a food processor 1 is illustrated and described -- first of all with reference to fig1 -- which has an agitator drive 2 , not illustrated in any more detail , in the form of an electric motor . a mixing vessel 4 , which has a handle 5 , is received in a mixing - vessel mount 3 . as can be seen from the plan view according to fig2 a cutter mechanism 6 is located in the mixing vessel 4 . the cutter mechanism 6 may also be exchanged and replaced by another cutter mechanism . it can be seen from the illustration according to fig1 but also from the end view according to fig3 that , at its upper rim 7 , the mixing vessel 4 is formed such that it widens by way of a conical shoulder 8 . a mixing - vessel lid 9 is illustrated in plan view in fig4 . it has a substantially circular opening 10 . the circular opening 10 has a centre point 11 which is offset with respect to a geometrical centre point 12 of the mixing - vessel lid 9 . the mixing - vessel lid 9 has an elliptical surface area . formed at the ends of the mixing - vessel lid 9 which are associated with the greater axis of the surface area , is , on one side , a hand grip 13 and , opposite this , a protrusion grip 14 , which is explained in detail hereinbelow . as can also be seen from the side view according to fig5 a locking hook 16 is formed on the underside of the hand grip 13 and , when the mixing vessel lid has been attached onto the mixing vessel , engages in a corresponding locking opening in the mixing vessel 4 . furthermore , it can also be seen that the opening 10 is adjoined by a downwardly projecting cylindrical continuation 15 which , when the lid has been attached , projects into the interior of the mixing vessel 4 . the protrusion grip 14 has a downwardly projecting spigot 17 . the latter interacts with the securing device , as is explained in more detail hereinbelow . fig6 shows the end view of the mixing - vessel lid 9 , on the side of the protrusion grip 14 . taking fig5 and 6 together , it is possible to see , specifically , a peripheral centring edge 70 which , in the inserted condition , is located in the interior of the mixing vessel 4 . furthermore , it is possible to see , specifically , from fig8 that the centring edge 70 consists of a relatively pliable plastics which is either moulded on in the two - component process or , as a ring , is fitted onto the structure of the mixing - vessel lid 9 or is inserted into the recess illustrated . specifically , the centring edge 70 has a protruding lip 71 which protrudes in the form of a v with respect to a solid region 72 of the centring edge 70 . if a liquid is in contact with the seal , then this pushes against the inside of the sealing lip 71 , thus increasing the contact - pressure force against the mixing vessel 4 . it can be seen from the bottom view of the mixing - vessel lid 9 illustrated in fig7 that the centring edge 70 has a geometrically identical progression , although on a smaller scale , to the surface area of the mixing - vessel lid 9 . it is thus also adapted to an opening cross - section of the mixing vessel 4 in the upper region , as is illustrated in detail hereinbelow . fig8 shows a section through the mixing - vessel lid in the direction of the greater axis of the elliptically - shaped surface area . fig9 shows a cross - section according to the illustration of fig8 although the section plane is offset by 90 ° with respect to the section plane of fig8 . as in fig4 it can also be seen here that an -- inner -- termination surface 73 provided on the narrow sides runs in a rectilinear manner , unlike the rest of the inner surface of the mixing - vessel lid 9 , which is curved to a relatively pronounced extent ( in the edge region ) or shallow extent . from the detail of fig1 , the spigot 17 can be seen , which interacts with the securing device , as is now explained in detail hereinbelow . it is disposed centrally with respect to the protrusion grip 14 , the latter also forming a protrusion edge 74 which projects downwards in the direction of the spigot 17 . from the cross - sectional detail of fig1 , it is also possible to see , in particular , an attachment edge 75 which is formed at the bottom of the upper cover periphery 76 , the outer surface of which connects with the mixing vessel 4 as a continuation thereof . it can be seen from the side illustration of the mixing vessel 4 according to fig1 that the mixing vessel 4 can be divided up essentially into three regions a , b and c . the lower region a is of substantially cylindrical construction . the region b adjoining it is of substantially conical construction . further , a region c connects with this in the upward direction , which defines a protruding portion extending away from the handle 5 , region c leading to a curved front contour line 18 -- on the side opposite the handle 5 . this contour line 18 also corresponds to an inner contour line . the end view of the mixing vessel 4 according to fig1 shows that the curved contour line 18 is not formed in the side regions of the mixing vessel 4 . it can be seen from the plan view according to fig1 that a centre point 19 of a circular opening cross - section of the lower region a , which centre point 19 coincides with an axis of rotation of the cutter mechanism , is located offset with respect to a centre point 19 &# 39 ; of the elliptically - shaped upper opening cross - section of the region c . the offset section v is formed in the direction of a greater longitudinal axis x of the upper elliptically - shaped opening cross - section , pointing away from the handle 5 . in addition , the bottom view of the mixing vessel 4 according to fig1 shows , in particular , a star - shaped coupling insert 20 for driving , for example , the cutter assembly 6 , which is described in more detail hereinbelow . it can further be seen from the cross - sectional illustration according to fig1 that an inwardly protruding step 21 is provided in the interior of the mixing vessel 4 . the step 21 is part of an overall wedge - shaped structure which extends in the region of the central section b and of the upper section c of the mixing vessel . the step 21 is provided on one side in the mixing vessel , as can also be gathered , in particular , from the illustration of fig1 . the step 21 proceeds further at a small angle to merge , via a surface 22 , into the inner wall 23 of the mixing vessel . the centre point of curvature for the surface 22 is in this connection the centre point 19 . the step 21 is arranged such that the material being stirred or mixed passes over it as it is subjected to a pronounced rotary movement , the cutter mechanism or a stirring insert thus not engaging against the step 21 . moreover , as can also be seen from the illustration shown , the step 21 is of an angled configuration , an upper step surface running approximately at and along the lower edge of the shoulder 8 . the other step surface runs approximately perpendicular thereto , with the curved transition in the right angle . the largest step shoulder can also be seen in the curved , substantially right - angled transition . towards the bottom , in the vertical region , the step surface is fully curved to a slight extent such that in detail , no right angle is formed , but rather an acute angle which is defined by the upper and vertical step surfaces . towards the bottom , the step shoulder is also reduced to an increasing extent until it terminates substantially in the region of an upper boundary of the region a of the mixing vessel 4 . overall , the upper surface 22 , which is parallel to the wall or is integrated into the circular shape of the wall , extends approximately over a quarter - circle of the surface area of the mixing vessel 4 . a securing device 24 is provided in the handle 5 of the mixing vessel 4 . the securing device 24 specifically comprises a hand lever 25 which is connected fixedly to a bush 26 formed as a coupling rod . a securing pin 27 is received in an upper region in the bush 26 . the securing pin 27 can only be moved vertically in the bush 26 , i . e . against the force of a spring 28 . by attaching the mixing - vessel lid 9 , the securing pin 27 is pushed downwards , i . e . by the spigot 17 ( see fig8 and 10 ). by this , specifically , a securing continuation 28 which is connected to the securing pin 27 is moved vertically downwards out of a slot 29 &# 39 ; of the bush 26 . the securing continuation 28 thus passes into a groove - like , at least partially circular , recess 29 , so that a rotation of the bush 26 by means of the hand lever 25 together with the securing pin 27 is enabled . a securing lug 30 is also formed on the hand lever 25 ( see also fig1 ) which engages in a securing groove 31 of the mixing - vessel lid 9 . by rotation of the hand lever 25 , the attached mixing - vessel lid 9 is thus simultaneously locked on the mixing vessel . however , due to the necessary vertical movement of the securing pin 27 , it is not possible to rotate the hand lever 25 unless the mixing - vessel lid 9 has been attached correctly . it is essential that the hand lever 25 , the securing pin 27 and the bush 26 are located outside the actual mixing vessel 4 , i . e . outside a mixing - vessel wall 32 . a through - passage in the wall 32 of the mixing vessel 4 is neither provided nor necessary for actuating the securing means and for providing the securing arrangement . a circumferential attachment edge 33 is provided on the outside of the mixing vessel 4 at the transition between the region a and the region b of the said mixing vessel 4 . a second wall 34 which terminates in the attachment edge 33 is also provided in the lower region of the mixing - vessel wall . the diameter of this attachment edge 33 increases towards the side at which the handle 5 is provided . the attachment edge 33 also secures at the same time the handle to the mixing vessel 4 in its lower region . in the upper region ( see fig1 ), the handle 5 is screwed to the mixing - vessel wall 32 by means of a screw - connection 77 . the securing of the handle 5 on the mixing vessel 4 is , in detail , arranged such that , as has been mentioned above , the handle 5 is screwed to the mixing - vessel wall 32 in the upper region and , in the lower region , is connected at the attachment edge 33 , for example , by hooking in . if , when the mixing vessel 4 has been inserted , any food or liquid should run down the outer wall of this mixing vessel , then the attachment edge 33 deflects this food or liquid around the mixing - vessel mount 3 , with the result that a heating device or the like provided there is not soiled . this could result in the mixing vessel 4 &# 34 ; sticking fast &# 34 ; in the mount 3 , whereupon removal of the vessel 4 from the mount is at least rendered more difficult . rather , the food or liquid trickling off runs off the housing . a free end 35 of the bush 26 has a positive - lock opening 36 level with the attachment edge 33 . the positive - lock opening 36 interacts with a coupling part 38 in the mixing - vessel mount 3 . this coupling part 38 is indicated schematically in the upper region of fig1 , one end of the bush 26 being illustrated here only by dashed lines . the coupling part 38 has a transverse pin 39 which engages in the positive - lock recess of the bush 26 . correspondingly , the mixing vessel can only be inserted into the mixing - vessel mount 3 when the hand lever 25 is located in a position corresponding to the open position . connected to the coupling part 38 , in axial extension of it , is an expansion toggle 40 , fig1 illustrating the non - actuated disposition and the actuated disposition of the expansion toggle . furthermore , these actuated and non - actuated positions can also be seen in the cross - sectional illustrations of fig2 to 23 . specifically , the expansion toggle 40 acts , via the spreading jaws 41 and 42 , on a retaining sleeve 43 which , in the non - stressed state ( see fig2 and 23 ), retains the inserted mixing vessel 4 in the lower region a in a positively locking manner . in the expanded state of the expansion toggle 40 ( see fig1 , 20 and 21 ), the sleeve 43 is biased against the action of the u - shaped spring 44 which acts on the spreading jaws 41 and 42 . it can also be seen from fig1 that a securing lever 45 is provided at a lower end of the coupling part 38 , the securing lever being illustrated in more detail in fig2 and 25 . the securing lever 45 turns with a rotational movement of the coupling part 38 . in this , it runs over a contact switch 46 and moves into the region of a plate 47 . the action of running over the contact switch 46 and moving in the region of the plate 47 further causes a securing pin 48 to move out upwards ( see also fig1 ), which mechanically secures the disposition of the securing lever 45 on the far side of the securing pin 48 and thus in the region of the plate 47 . without moving the securing pin 48 back , it is not possible to release and thus remove the mixing vessel 4 from the mixing - vessel mount 3 in the food processor 1 . also associated with this is the fact that it is only when the securing pin 48 is moved out that the agitator or the heating device can be freed for activation . correspondingly , the mixing vessel 4 cannot be removed without the agitator and the heating device being deactivated . if the food processor is put into operation by means of the speed regulator , then the securing pin 48 moves out and locks the securing lever 45 . this can take place purely mechanically or else electromechanically . the securing pin 48 only moves back when the drive motor and thus the cutter mechanism 6 have come to a standstill . it is only after this that it is possible to unlock the mixing - vessel lid and remove the mixing vessel 4 from the mount 3 . it is thus ensured that the cutter mechanism 6 is at a stand - still before the mixing vessel 4 is opened . any risk to the user is thus ruled out . fig2 to 31 illustrate a cooking insert 50 which is advantageous , in particular , for use in the interior of the mixing vessel 4 beneath the mixing - vessel lid 9 . the cooking insert 50 has a perforated , substantially conical or , optionally , also cylindrical side wall 51 and a perforated base 52 . furthermore , it has an upper peripheral collar 53 which has an elliptical surface area . here , in a manner comparable with the mixing vessel 4 , the elliptical surface of the collar 53 is offset with respect to a centre point of the base 52 . the point 54 can be regarded as the centre point of the base 52 , while the point 55 can be regarded as the geometrical centre point of the elliptical configuration of the collar 53 . this results in the collar 53 having a larger extent of projection y on one side -- the front side -- than to the rear -- z . the lateral extent of projection -- t -- is , in turn , smaller than the rear extent of projection z . in the front region of the collar 53 , there are likewise provided slot - like through - passages 56 , these also being provided in the conical wall and in the base . furthermore , in its front region , the cooking insert has a pouring spout 57 cut into it , which has a crossbar 58 gripping over it . the crossbar 58 may thus act in the manner of an eyelet for receiving a hook in a seating manner . the incorporated of the cooking insert into the mixing vessel is illustrated in fig3 . fig3 shows a plan view of the mixing - vessel mount 3 . this is formed in the manner of a bowl . provided in the base of the mixing - vessel mount 3 is a discharge opening 59 , in regard to which reference is also directed to fig3 . furthermore , it is possible to see a star - shaped coupling recess 60 which transmits the motor power to the agitator and / or the cutter assembly 6 . the star - shaped coupling insert 20 ( see fig1 ) engages in the coupling recess 60 . the three - pointed star configuration of the one side of the coupling and the six - pointed star construction of the other side of the coupling means that , on the one hand , the coupling position can be easily obtained when the mixing vessel 4 is inserted and , on the other hand , a secure , positively locking coupling connection is also achieved . it can be seen from the sectional illustration according to fig3 that the discharge opening 59 engages in a connection piece 62 which projects upwards from a base 61 of the food processor 1 , with the result that any liquid or the like which has run over into the mount 3 can run out in its entirety , from the food processor 1 , through the discharge opening 59 . a mixing - vessel spatula 78 is illustrated in fig3 . the essential feature of the mixing - vessel spatula 78 is a hook - like formation 79 . this is suitable , in particular , for interacting with the eyelet ( crossbar 58 ) on the cooking insert 50 . as a result , the cooking insert 50 can be held down in the mixing vessel 4 , for example , when liquid is being poured out . the vessel may be configured in the form of a bowl . in fig1 , a cream - whipping device 64 inserted in the mixing vessel 4 is illustrated . said cream - whipping device 64 has two blades 66 which are moulded radially onto a cylindrical coupling mount 65 . the blades 66 have regular through - passages and , at least in their lower regions , have an outer contour which corresponds to the mixing - vessel base 67 . the cream - whipping device 64 is positioned on the cutter mechanism 6 , for example on a nut which secures the cutter mechanism 6 , by means of its coupling mount 65 . a second embodiment of the cream - whipping device 80 is illustrated in fig3 to 38 . corresponding to the first exemplary embodiment in fig1 , this cream - whipping device 80 has a cylindrically shaped coupling mount 81 from which there extend two mutually opposite , radially outwardly directed whipping blades 82 . these whipping blades 82 are essentially formed in the manner of a skeleton and , in their regions remote from the mount 81 , have cross - pieces 83 which are aligned perpendicularly with respect to the axis of rotation of the cream - whipping device 80 . as can be seen from fig3 , said cross - pieces are offset at an angle with respect to a horizontal , the cross - pieces 83 being alternately offset in the positive and negative directions with respect to the horizontal . a handle - like grip 84 is moulded on at the top of the coupling mount 81 , by means of which the cream - whipping device 80 can be positioned in the mixing vessel 4 or on the cutter mechanism 6 , or removed from the actor mechanism , in an extremely simple manner . in fig3 , there is illustrated the inserted condition of cream - whipping device 80 in the mixing vessel 4 . it can be seen that the cream - whipping device 80 is plugged onto a driver 85 of the cutter mechanism 6 by means of its coupling mount 81 . the arrangement here is such that the whipping blades 82 are located in a wedge of the cross - form cutter assembly 6 . a second embodiment of the securing device 24 is also illustrated in fig3 . the rotatable hand lever 25 attached on the handle 5 has a u - shaped configuration in cross - section . a coupling rod 86 is actuated by means of this hand lever 25 , as is also the case in the first exemplary embodiment . said coupling rod is connected in a rotationally fixed manner to the hand lever 25 and has a curved extent within the handle 5 . a first section of curvature of the coupling rod 86 is located in an upper region of the handle 5 , the curvature running substantially towards a centre axis z of the mixing vessel 4 . a further , second section of curvature of the coupling rod is effected in the lower region of the handle 5 before the coupling rod 86 passes out of the handle 5 to bring the coupling rod 86 into a vertical position again . this configuration makes it possible to displace the handle 5 or the handle region in the direction of the centre axis z of the mixing vessel 4 such that the lever forces are kept low when the mixing vessel 4 is full . the coupling rod 86 passes through the handle 5 in the region of an opening 87 . the coupling end 88 which projects from the bottom of the handle 5 is in the form of a hammer head . the opening 87 has a contour which corresponds to the hammer head ( see fig4 ). in the region of the coupling rod 86 which is associated with the hand lever 25 , the coupling rod is associated , in a rotationally fixed manner , with a securing pin 89 which is aligned parallel , but in a radially offset manner , to the coupling rod 86 in this region . the securing pin 89 is fastened on the coupling rod 86 by means of a spring 90 . this spring 90 always forces the securing pin in the direction of the hand lever 25 and towards the handle cover 91 provided there . furthermore , the securing pin 89 is retained on a disc 92 located in a rotationally fixed manner on the coupling rod 86 , which disc has a bore 93 for the passage of the securing pin 89 . in the partial representation in fig3 a , the blocking position of the securing device 24 is illustrated . it can be seen that the securing pin 89 passes , by means of the spring 90 , through the bore 93 of the disc 92 into a blocking opening 94 of the handle cover 91 . this blocking opening 94 is open upwardly , that is to say in the direction of the hand lever 25 . the mixing - vessel lid 9 which is to be attached has a downwardly directed spigot 95 which , when the lid 9 has been attached , enters into the blocking opening 94 from above . this results in a displacement of the securing pin 89 into an unblocked disposition according to fig3 . after this , a pivoting of the hand lever 25 can be effected . a rotation or pivoting of the hand lever 25 results in corresponding pivoting of the hammer - head - formed coupling end 88 . pivoting through approximately 67 ° is preferred here . this construction has proved to be particularly advantageous , since there are no relative movements between the actuating elements and no wear thus occurs . the entire securing device 24 can be removed from the handle 5 and inserted into it again in an extremely simple manner . the entire device is fastened on said handle cover 91 which , in turn , can be fastened on the handle 5 , for example by means of a rear - engagement fastening and a fixing screw 96 . a third embodiment of the securing device 24 is illustrated in fig4 , 40a and 40b . in the region of the coupling rod 86 which is associated with the hand lever 25 , a locking protrusion 150 is moulded on this coupling rod 86 , beneath the handle cover 91 , which protrusion , in a blocking position according to fig4 a and 40b , is oriented in the direction of the centre axis z of the mixing vessel 4 . in the blocking position , this locking protrusion 150 is located in a blocking pocket 151 of a locking link 152 . the latter is essentially made up of a plate , which is aligned perpendicularly with respect to the coupling rod 86 and has the blocking pocket 151 , and of an angled leg which extends from this plate . by way of this leg , the locking link 152 is mounted on the underside of the handle cover 91 such that it can be pivoted via a pin 153 . the plate 154 has a central bore 155 for the passage of the coupling rod 86 . the radially aligned blocking pocket 151 extends from this bore 155 on the side facing the handle cover 91 . provided on that side of the bore 155 which is directed away from the blocking pocket 151 is a further through - passage 156 , through which a bolt 157 on the handle cover passes . in the region of its free end , this bolt is provided with an annular collar on which there is mounted a compression spring 158 which engages around the bolt 157 . said compression spring acts on the underside of the locking link 152 by means of its end directed away from the annular collar , with the result that said locking link is spring - loaded in the direction of the underside of the handle cover 91 . this means that the locking link 152 is always biassed in the direction of a position in which the locking protrusion 150 is blocked . as can be seen from fig4 a and 40b , it is not possible , in this position , for the coupling rod 86 to be rotated by means of the hand lever 25 since the locking protrusion 150 is located in the blocking pocket 151 , which is the very thing which prevents this rotation . in order to permit rotation of the coupling rod 86 , the mixing - vessel lid 9 has to be attached . the latter is provided on its underside , in the region of its protrusion grip 14 , with two actuating protrusions 159 which , when the mixing - vessel lid 9 is attached , pass through corresponding bores 160 in the region of the handle cover 91 and act on the locking link 152 . as a result , the locking link 152 is pivoted around the pin 153 against the spring force of the compression spring 158 , with the result that the blocking pocket 151 releases the locking protrusion 150 for turning ( see fig4 ). unlike the exemplary embodiments described above , in this case it is not the securing pin or the locking protrusion which is displaced into a position for turning - action release , but rather the locking link which blocks the locking protrusion . as was also the case in the first exemplary embodiment , the coupling rod 86 or its coupling end 88 acts on a coupling part 38 when the mixing vessel 4 has been inserted into the mixing - vessel mount 3 . in fig4 and 43 , this coupling part 38 is illustrated in more detail in a second embodiment . it can be seen that the coupling part 38 comprises a coupling bush 98 which is pushed onto the top of a camshaft 97 , it being possible for the coupling bush 98 to be displaced vertically against a spring 99 on the camshaft 97 . coupling bush 98 and camshaft 97 are always connected to one another in a positively locking manner irrespective of the vertical displacement position of the coupling bush 98 , with the result that rotational movements of the coupling bush 98 are transmitted to the camshaft 97 . as in the first exemplary embodiment , the camshaft 97 carries an expansion toggle 40 for spreading apart two spreading jaws 41 and 42 of a retaining sleeve 43 . in its upper region , the coupling bush 98 has a peripheral edge 100 . for positively locking coupling to the coupling end 88 of the coupling rod 86 , the coupling bush 98 has a slot - like receiving means 101 located at the top . latched on to the peripheral edge 100 is a blocking sleeve 102 which has a keyhole - like through - opening 103 corresponding to the cross - section of the hammer - head - formed coupling end 88 . the blocking sleeve 102 is preferably moulded as a plastics injection moulding and provides a frustoconical sealing bead 104 at the top . the blocking sleeve 102 has two radially aligned pairs of jaws 105 , between which pairs of jaws 105 there engage pins 106 which are secured to the housing ( see fig4 ). this arrangement prevents the blocking sleeve 102 from rotating , but permits a vertical movement of the blocking sleeve 102 . the hammer - head - formed coupling end 88 passes through the housing 107 of the food processor 1 in the region of a circular through - opening 108 which has at the bottom , that is to say facing the blocking sleeve 102 , a frustoconical contour corresponding to the sealing bead 104 . when the mixing vessel 4 is inserted into the mixing - vessel mount 3 , the coupling end 88 passes through the through - opening 108 of the housing 107 and , after this , through the keyhole - like opening 103 of the blocking sleeve 102 until the coupling end 88 is located in the receiving slot 101 of the coupling bush 98 . after this , there is effected a vertical displacement of the coupling bush 98 together with the blocking sleeve 102 against the pressure of the spring 99 , the coupling bush 98 and blocking sleeve 102 being moved away from the housing through - opening 108 . after insertion of the mixing vessel 4 into the mount 3 has been completed , the above - described pivoting of the hand lever 25 takes place , which results in the coupling rod 86 , and thus the coupling end 88 , being rotated . likewise due to the positive lock , this rotation causes a rotation of the coupling bush 98 , and , as a result , a rotation of the camshaft 97 into the position in which the mixing vessel 4 is clamped in . the blocking sleeve 102 accompanies the vertical movement , but does not rotate . the blocking - sleeve opening 103 and the hammer - head - formed coupling end 88 are oriented offset with respect to one another in this position ( see fig4 ). accordingly , the coupling end 88 is arrested in the vertical direction in this position . should the user wish to remove the mixing vessel 4 , then a reverse displacement into the basic position by means of the hand lever 25 is first of all imperative in order that the receiving slot 101 and the keyhole opening 103 or the coupling end 88 and the keyhole opening 103 are made to coincide . it is only after this , that the hammer - head - shaped coupling end 88 can be pulled vertically out of the coupling part 38 . this precludes the risk of the user spreading apart the retaining sleeve 43 to such an extent that the mixing vessel 4 can indeed be removed , but the retaining sleeve 43 does not latch into its end position . in this case , during removal of the mixing vessel 4 , the coupling end 88 would be pulled out of the coupling part 38 , so that the u - spring 44 allows the retaining sleeve 43 to grip again and clamps the mixing vessel 4 in . since , in this position , the coupling would already have been disengaged , it would no longer be possible for the user to remove the mixing vessel 4 . this malfunctioning is avoided by the invention specified since it is only in a stop position in which the slots and openings of the blocking sleeve 102 and coupling bush 98 are located one above the other that the coupling rod 86 can be pulled out . in the locking position shown in fig4 , the seal in the region of the housing through - opening 108 is deactivated . the seal only takes effect when the mixing vessel 4 has been removed . in this case , the sealing bead 104 of the blocking sleeve 102 seals the region of the housing through - opening 108 in this region . the cones of the sealing bead 104 and of the opening 108 grip one inside the other and thus provide an effective seal . the receiving slot 101 , formed as a driver pocket , of the coupling bush 98 is closed towards the bottom , with the result that it is not possible for any water or the like to penetrate in there either . furthermore , it has proved to be advantageous here that , when the mixing vessel 4 has been inserted , the coupling part 38 and also the coupling end 88 passing through the housing 107 do not come into contact with the housing 107 . manufacturing tolerances in the vertical direction are compensated for by the coupling part 38 penetrating into the housing 107 . tolerances in the horizontal direction do not result in any contact between the coupling rod 86 and housing 107 , since the through - opening 108 is arranged to be considerably larger than the diameter of the coupling rod 86 . furthermore , the weighing result is not influenced by the coupling part 38 being decoupled from the housing 107 . fig4 to 49 illustrate a second embodiment of the cutter - mechanism fastening , in detail and assembly views . the cutter assembly 6 is made up essentially of four cutters 110 which are arranged radially around a drive shaft 109 and in each case enclose an angle of 90 ° with one another , two mutually opposite cutters 110 , starting from the drive shaft 109 , first of all extending perpendicularly with respect to the drive shaft 109 and being then curved downwards , in the direction of the mixing - vessel base 67 in the installed position . the other two cutters 110 run essentially in a horizontal direction . the cutters 110 or the cutter assembly 6 is / are fastened on the drive shaft 109 by means of a screw - member 111 . furthermore , the screw - member 111 carries the abovementioned driver 85 at the top . the drive shaft 109 is mounted rotatably in a cutter bearing 112 and the bottom of the cutter bearing 112 continues in the abovementioned coupling insert 20 . the cutter assembly 6 is operationally connected in non - releasable manner to the cutter bearing 112 . this structural unit is inserted into the mixing vessel 4 from above , the cutter bearing 112 passing through the mixing - vessel base 67 in the region of a correspondingly shaped retaining opening 113 . for engaging against the edge region of the retaining opening 113 , the cutter bearing 112 has a supporting shoulder 114 . in the region which is located beneath the supporting shoulder 114 , which tapers in cross - section , the cutter bearing 112 , which has a substantially circular shape , has two diametrically opposite flattened portions 115 . outwardly directed spigots 116 are provided so as to be offset by 90 ° with respect to these flattened portions 115 . the retaining opening 113 of the mixing - vessel base 67 has a corresponding contour . flattened opening regions 117 and passage regions 118 for the spigots 116 are thus also provided here . fig4 illustrates a stand 119 in section . this stand 119 is preferably a plastics part . the outer contour of the stand 119 corresponds substantially to the shaping in the region of the mixing - vessel base 67 . the stand 119 has a central , circularly shaped , through - opening 120 which , in two mutually opposite regions , has radially outwardly extending through - passages 121 . at the top , the through - opening 120 is surrounded by a collar 123 . at the bottom , the through - opening 120 is provided with a downwardly directed wall 122 which has a larger diameter than the through - opening 120 . said wall 122 has two mutually opposite recesses 124 with open edges . the residual wall regions remaining between these recesses 124 have inwardly projecting latching lugs 125 . these latching lugs 125 hold a retaining ring 126 which , as seen in the vertical direction , is mounted between the latching lugs 125 and the underside of the through - opening 120 . the retaining ring 126 is retained in a rotationally fixed manner since the retaining ring 126 has , on its outer wall , two mutually opposite protrusions 127 which engage in the abovementioned recesses 124 of the wall 123 . a wavy spring 128 located in the region between the retaining ring 126 and the underside of the through - opening 120 forces the retaining ring 126 in the direction of the latching lugs 125 . as already mentioned , the cutter bearing 112 along with the cutter mechanism 6 is plugged through the retaining opening 113 of the mixing - vessel base 67 , after which , due to the flattened formations , it is no longer possible for the cutter bearing 112 to be rotated . provided between the supporting shoulder 114 and the mixing - vessel base 67 is a sealing ring 129 which seals axially between the cutter bearing 112 and the mixing vessel 4 so that it is not possible for any liquid to pass out of the mixing vessel 4 . in order to fasten the cutter bearing 112 on the mixing - vessel base 67 , the stand 19 is then positioned against the cutter bearing 112 from beneath such that the spigots 116 pass through the through - passages 121 in the region of the through - opening 120 . the retaining ring 126 has correspondingly formed recesses 130 . when the stand 119 is turned through approximately 180 °, the spigots 116 engage behind correspondingly formed annular shoulders 131 , which define run - on slopes . a stop projection 132 is provided at the end of each run - on slope . the seal 129 is given a defined bias by the stand 119 , which , at two laterally projecting spigots 116 of the cutter bearing 112 , pushes the latter downwards against the mixing - vessel base 67 . in this case , the stand 119 is supported against the underside of the mixing - vessel base 67 . in order to render the contact - pressure force virtually independent of tolerances , the spring - biassed latching ring , which is made up of the retaining ring 126 and the wavy spring 128 , is fastened in the stand 119 . this latching ring is in positively locking contact with the spigots 116 on the cutter bearing 112 . in order to provide improved support of the cutter bearing 112 on the mixing - vessel base 67 , it may also be provided that the cutter bearing 112 has a radial collar by means of which the cutter bearing 112 engages fixedly against the mixing - vessel base 67 . in this case , the biassing of the seal 129 depends on the vertical extent of the collar . as already mentioned , the stand 119 is produced from plastics and serves simultaneously as a set - down surface of the mixing vessel 4 . in all cases , the temperature of the stand 119 is considerably lower than that of the mixing vessel 4 , thus also making it possible for the hot mixing vessel 4 to be positioned on surfaces which are not heat - resistant , such as , for example , wood . a cooking insert 50 in a second embodiment is illustrated in fig5 to 52 . this differs from the first exemplary embodiment shown in fig2 to 31 essentially in the eyelet - like configuration for mounting reception of a hook . as can be seen , in particular , from the partial section of fig5 , a dovetail - like receiving eyelet 133 is provided here , which is located , as a sheet - metal part , in the region of the pouring spout 57 . the receiving eyelet 33 is upwardly open . the through - passages 56 of the cooking insert 50 serve , inter alia , for rinsing foods , such as , for example , rice , with boiling water . furthermore , when liquid is poured out , solid constituents contained therein are retained by the cooking insert 50 . if the cooking insert 50 is inserted into the mixing vessel 4 before fruit , for example , is chopped up , then this results in an increased amount of juice being produced , since the fruit cannot pass into the upper part of the mixing vessel 4 and is thus subjected to more intensive processing by the cutters 110 . in fig5 to 55 the mixing vessel 4 , the cooking insert 50 and the mixing - vessel lid 9 in a second embodiment are illustrated , in each case in a side view . it can be seen here that , instead of the locking hook 16 provided in the first exemplary embodiment , the mixing - vessel lid 9 now has a cross - member 134 . this cross - member 134 is provided with a slot 135 in which a tongue 136 of the mixing vessel 4 engages when the mixing - vessel lid 9 has been attached . after the mixing - vessel lid 9 has been removed , the tongue 136 also serves as a pouring spout . dual securing is thus provided for the attached mixing - vessel lid , on the one hand by the engagement of the tongue 136 in the slot 135 and on the other hand by a u - leg of the hand lever 25 gripping over the protrusion grip 14 ( see fig3 in this context ). a mixing - vessel spatula 78 in a second embodiment is illustrated in fig5 to 58 . said spatula is made up essentially of a spatula handle 137 and a spatula portion 138 . spatula handle 137 and spatula portion 138 are formed separately , the spatula portion 138 preferably consisting of a more pliable plastics than the spatula handle 137 . the spatula portion 138 is pushed onto the spatula handle 137 by way of a groove - tongue connection . the spatula handle 137 has a plate - like handle - region boundary 139 . furthermore , in the region of the spatula portion 138 , the mixing - vessel spatula 78 has a removal protrusion 140 which is configured in the form of a dovetail , for interacting with an insert vessel , for example , with the cooking insert 50 . in order to remove the cooking insert 50 from the mixing vessel 4 , use may then be made of the mixing - vessel spatula 78 , in that the dovetail - like removal protrusion 140 is pushed into the receiving eyelet 133 , which is likewise in the form of a dovetail . such a removal position is illustrated in fig5 . furthermore , this configuration may also serve to hold down the cooking insert 50 when the mixing vessel 4 is being emptied . furthermore , use is made of the mixing - vessel spatula 78 during mixing operation , in particular for preparing a dough , mix or batter . for this purpose , the mixing - vessel spatula 78 is passed through the mixing - vessel lid 9 and held , in the region of its opening 10 , in the dough , mix or batter which is to be mixed . a further configuration of the safety lock according to fig2 and 25 is illustrated in fig6 to 61a . in this case , a radially outwardly projecting securing lever 45 &# 39 ; is likewise disposed at the lower end of the camshaft 97 , a blocking link 161 being moulded on in its free end region . said blocking link is formed as an extension to the securing lever 45 &# 39 ; and , in plan view , has a contour in the form of part of a ring . as can be seen , in particular , from fig6 a , the blocking link 161 is moulded on on the underside of the securing lever 45 &# 39 ;. a lever - like momentary - contact switch 162 , which is mounted pivotably on a housing wall 163 , is also provided . the switch is mounted via a pivot pin 164 , on which a leg spring 165 is also located . one end of said leg spring is supported on the housing wall 163 and its other end is supported on the inner side of the momentary - contact switch 162 , as a result of which the latter is biassed in a direction which is oriented away from the securing lever 45 &# 39 ;. at its free end , the momentary - contact switch 162 has an l - shaped blocking shoulder 166 , one l - leg 167 being oriented in the direction of the securing lever 45 &# 39 ;. an actuating protrusion 168 which is likewise oriented in the direction of the securing lever 45 &# 39 ; is provided beneath this blocking shoulder 166 . to be specific , this actuating protrusion 168 is oriented in the direction of a safety switch 46 &# 39 ;, which is likewise secured on the wall 163 . on the side directed away from the safety switch 46 &# 39 ;, the momentary - contact switch 171 is supported by a push rod 169 of an electromagnet 170 . this electromagnet 170 is likewise secured on the housing . in fig6 and 60a , a basic position is illustrated , i . e . a position in which the safety device has not yet been activated , for example when the mixing vessel 4 has not yet been inserted into the mount 3 and / or the mixing vessel lid 9 has not yet been attached to the mixing vessel 4 . in this position , the agitator drive 2 or the heating device should be prevented from being activated . this is prevented by the momentary - contact switch 162 , which is to activate the safety switch 46 &# 39 ;, being blocked , in the direction of the safety switch 46 &# 39 ;. in this way , the l - leg 167 of the blocking shoulder 166 is supported against the blocking link 161 ( see fig6 a ). if , in this position , an attempt is made to switch on the agitator drive , then the electromagnet 170 is activated . the push rod 171 tends to move out and displace the momentary - contact switch 162 in the direction of the safety switch 46 &# 39 ;. however , as already mentioned , this is prevented by the blocking link 161 . operation of the agitator drive 2 is thus not possible without first of all inserting the mixing vessel 4 and providing this with the lid 9 . it is only after actuation of the securing device 24 and associated pivoting of the securing lever 45 &# 39 ;, mounted on the camshaft 97 , into the position illustrated in fig6 and 61a that the drive 2 can be switched on . the blocking link 161 leaves the region of the momentary - contact switch 162 , the latter thus pivoting about the pivot pin 164 as a result of the rearward action of the push rod 171 . this pivoting causes actuation of the safety switch 46 &# 39 ; by means of the actuating protrusion 168 . the safety switch 46 &# 39 ; may , for example , be a break - contact element which , upon actuation , closes the circuit to the drive 2 . it is , however , also possible to provide a safety switch 46 &# 39 ; which , for the purpose of releasing the drive , merely sends a pulse to an electronics unit inside the appliance . when the momentary - contact switch 162 is in the pivoted position , locking of the securing lever 45 &# 39 ; in its securing position is effected according to fig6 . it is thus possible to move the securing lever 45 &# 39 ;, by means of the securing device or by the camshaft 97 , into its initial position again only when the momentary - contact switch 162 has been moved back . in this exemplary embodiment , blocking of the securing lever 45 &# 39 ; takes place at two points . on the one hand , the l - leg 167 of the blocking shoulder 166 of the momentary - contact switch 162 blocks the securing lever 45 &# 39 ; in the region of its blocking link 161 and , on the other hand , the other l - leg of the blocking shoulder 166 blocks the securing lever 45 &# 39 ; in the region of the end portion of the latter which projects beyond the blocking link 161 . in order to release the securing lever 45 &# 39 ;, the momentary - contact switch 162 can only be pivoted into a release position when the electromagnet 170 is demagnetized and the leg spring 145 thus becomes effective . for this purpose , it is necessary first of all to switch off the drive 2 and , if appropriate , the heating device . however , the electromagnet 170 is only demagnetized after the cutter mechanism 6 is at a complete standstill . for this purpose , there may be provided , on the agitator drive 2 or in the region of the cutter mechanism , a speed sensor which only interrupts the power supply to the electromagnet 170 when the cutters are at a complete standstill . the push rod 171 is no longer moved in the direction of the momentary - contact switch 162 . the leg spring 165 causes the momentary - contact switch 162 to be moved back , the actuating protrusion 168 leaving the safety switch 46 &# 39 ; and the blocking shoulder 166 leaving the region of the securing lever 45 &# 39 ;. it is then possible to rotate the latter , as a result of which it is also possible to expand the sleeve retaining the mixing vessel 4 . also conceivable is a configuration in which the electromagnet 170 is always activated when the food processor 1 is in the basic switched - on state and , in a basic position , the momentary - contact switch 162 always engages against the blocking link 161 . in this case , it is necessary to switch off the food processor 1 fully in order to release the securing position of the securing lever 45 &# 39 ; shown in fig6 and 61a , this demagnetizing the electromagnet 170 in order to release the momentary - contact switch 162 . finally , a lid cap 141 is provided , which is illustrated in fig6 and 63 . this lid cap is formed as a cylindrical hollow body and is provided with a top 142 . approximately halfway up , the lid cap 141 is provided , on its outside sleeve surface , with an annular collar 143 which has an approximately triangular cross - section . the external diameter of the annular collar 143 is somewhat larger than the diameter of the opening 10 of the mixing - vessel lid 9 . also provided in the region of the annular collar 143 are three supporting protuberances 144 which are distributed uniformly on the circumference , each protuberance 144 extending uniformly above and beneath the annular collar 143 . the radial depth of each supporting protuberance 144 corresponds to that of the annular collar 143 . the lid cap 141 serves for insertion into the opening 10 of the mixing - vessel lid 9 . the lid cap 141 is supported by this in the region of its the supporting protuberances 144 by these protuberances in the edge region of the opening 10 , as a result of which an annular slot 145 remains for the passage of vapour ( see fig6 ).
the invention pertains to a food processor with a mixing vessel and a drive mechanism for an agitator in the mixing vessel , where the mixing vessel has in its lower region an opening of substantially circular cross - section . to make this type of food processor more practicable the invention proposes that the cross - section of the upper opening be elliptical and that a geometric mid - point of the upper opening cross - section be offset from a mid - point of the lower opening cross - section .