the present invention will now be disclosed in detail with the aid of the embodiment of fig1 through 7 . fig1 shows an ejector holder of a type especially designed to hold in an operative position a cartridge in conjunction to form a system that embodies the principles of the present invention . the holder comprises a barrel ( 1 ) having an interior bore ( 2 ) extending from a rearward end ( 3 ) toward the forward end ( 4 ) thereof for receiving a plunger ( 5 ) of the same diameter as that of the interior bore ( 2 ) for the major portion of the length of the plunger . the forward end of the plunger has a smaller diameter extension ( 6 ). the rearward end ( 3 ) of the barrel ( 1 ) extends through the handle member ( 8 ). the barrel ( 1 ) has a flange ( 7 ) that is located in a recess of the handle ( 8 ) that is perpendicular to the barrel ( 1 ). the barrel is then free to rotate within this recess ( 14 ). connected to the flange ( 7 ) of the barrel ( 1 ) is an electrical connection ( 26 ) such that when the barrel ( 1 ) is rotated the electrical connection is not compromised . the proximal end of the barrel ends in forward bulkhead ( 15 ) that allows the forward end of the plunger ( 2 ) to pass through . the bulkhead is of such thickness as to allow for an electrical connection to electrical leads ( 21 ) running longitudinally from the electrical connection ( 50 ) at the proximal end of the barrel to the distal flange ( 7 ) with the associated electrical connection ( 26 ). the proximal end of the barrel ( 1 ) has forward extensions such as to engage recesses ( 61 ) located in the distal face of the cartridge ( 32 ) as shown in fig3 and 5 , in such a configuration that these mated extensions and recesses ( 61 ) when rotated in the proper direction will give a positive seat between the anterior portion of the bulkhead ( 15 ) and the flat portion of the distal end of the cartridge ( 28 ). the cartridge ( 32 ) has an electrical connection ( 50 ) which mates with a concomitant connection in the bulkhead ( 15 ) of barrel ( 1 ) as shown in fig2 . the cartridge ( 32 ) has an embedded coil ( 60 ) as shown in fig1 and 2 . the cartridge ( 32 ) mates with the barrel ( 1 ) at its proximal end which contains a bulkhead ( 15 ) allowing for a strong connection of the combined member to become a part of a rotating , electrically conductive component attached to a handle ( 8 ). the handle ( 8 ) is pivotally connected to an operating lever ( 12 ) through a pivot pin ( 10 ) located at the upper end of the handle ( 9 ) and the operating lever ( 12 ) that is offset laterally to facilitate the operation of the lever ( 12 ) with respect to the outer end of the plunger ( 8 ) which terminates in a button ( 11 ) engaged by the inner surface ( 12 ) of the operating lever . a coiled spring ( 28 ) surrounds the distal portion of the plunger between the forward handle ( 8 ) and the button ( 11 ) for purposes of extracting the plunger ( 5 ) when the operating lever ( 9 ) is released , following ejection of material from the cartridge ( 32 ). the handle ( 8 ) contains an appropriate electrical source ( 13 ) such as a battery or capacitor discharge device and / or connection to an electrical outlet through a connecting cable . the handle ( 8 ) contains an on / off switch ( 22 ) connected to the electrical source ( 13 ) in conjunction with a temperature controller device ( 23 ) through a feedback thermocouple contained within or on the surface of the cartridge ( 60 ) ( 55 ). the cartridge ( 32 ) which in conjunction with the dispensing device comprises the system is located at the proximal end of the barrel ( 1 ). the cartridge ( 32 ) is preferably formed by molding from a rigid synthetic resin or plastic material by means of a suitable mold . the intermediate body portion of the capsule ( 63 ) as shown in fig5 for connection to the barrel ( 1 ) projections and also has electrical connections ( 50 ) that mate with similar connections ( 59 ) in the connecting face of the barrel ( 1 ). the cartridge is of sufficient thickness ( 62 ) to allow for an appropriate placement and configuration of a wire ( 60 ) that may be a coil but not limited to such configuration that when an electrical current is passed through creates a rise in temperature through resistance in one method and induction in the second method . the capsule ( 32 ) has a thermocouple device ( 55 ) to allow for a feedback mechanism to control the temperature of the material in the cartridge ( 70 ). horizontal metal ribs ( 55 ) located in a longitudinal direction within the cartridge walls beneath the induction coil ( 60 ) become hot when subjected to the proper current and also act as a thermocouple ( 55 ) in a form of the invention . in another form of the invention , the barrel ( 1 ) is extended to cover the cartridge ( 32 ) which contains only the horizontal metal ribs ( 55 ) and no induction coil ( 60 ). the induction coil ( 60 ) is located in the barrel ( 1 ) as shown in fig2 at the extended end and the electrical connection is with a direct wire ( 21 ) to the distal portion of the barrel ( 1 ) and connected to an on / off switch connected to the temperature feedback mechanism . the body of the cartridge ( 63 ) extends forward in a uniform manner to a hemispherical closed end with an opening into an angularly placed discharge nipple ( 40 ), the opening of which is preferably a very fine dimension of small diameter . to effect the ejection of material from the cartridge ( 32 ) such as dental filling material , cement , or other viscous material and the like , for example , the cartridge ( 32 ) includes a piston ( 31 ) as shown in fig2 , and the inner end thereof also is hemispherical and complementary to the interior of the closed end of the cartridge . without restriction thereto , the outer end of the piston may be flat for encasement , for example in fig2 where the proximal end of plunger ( 5 ) is moved forward by actuation of the operating lever ( 9 ). removal of the cartridge ( 32 ) from the proximal end of the barrel is accomplished by turning in the appropriate direction allowing the connecting tangs on the proximal end of the barrel ( 15 ) to disengage from the female connection ( 61 ) in the distal end of the cartridge ( 28 ). from the foregoing , it will be seen that the proximal end of the barrel ( 15 ) is especially adapted to receive the particular type cartridge ( 32 ) to be used therewith , which is a subject of the system in this application . this does not limit the connecting mechanism to the one previously described but only to demonstrate the necessity of having a positive connection to allow for a secure tight seal and positive electrical conductivity . the connection is very simple , highly effective design to permit a sure and effective adaptation and release . the cartridge ( 32 ) comprising part of the method and the system of the invention not only is capable of serving as receptacle for material to be discharged when filled for example , from storage supply , but , even more importantly , the cartridge can be filled at a factory with predetermined quantities of material , by automatic machinery , and sealed therein by application of the piston ( 31 ) which , under the circumstance , serves as a closure for the cartridge . the above described design particularly facilitates such operations . further , during filling , air in the cartridge in advance of the material can be discharged through the nipple ( 44 ) until filled and then the open end of the nipple may be suitably and inexpensively closed by suitable seal means , such as a small piece of sheet material having pressure sensitive cement on one side and placing said piece across the nipple in any suitable manner . in accordance with the invention , a further improved feature for the cartridge comprises providing a preferably cup - shaped cap ( 45 ) which is of a suitable shape either to frictionally engage the tip portion of the nipple ( 44 ) or either the cap or nipple , or both to secure the cap releasably upon the tip of the nipple in sealed manner . cap ( 45 ) has an outer flange position adjacent to the opening of the cap . in closed position , the inner surface of the cap ( 45 ) is retained by the nipple with a force sufficient to slightly bend the wall of the cap . this creates enough friction to allow for a secure closure and also allows for easy removal prior to its intended use . moreover , the cap ( 45 ) serves an important additional feature in that , in addition to sealing the contents of the cartridge in conjunction with the piston ( 31 ), the cap may be color coded to any number of purposes , weight or quantity of the material therein , setting time , and otherwise . also the body of the cartridge as well as the cap ( 45 ) and piston ( 31 ) may all be molded from a similar plastic material which is colored suitably to render the items opaque or otherwise impervious to the transmission of ambient light which , if the contents are subject to being set by such light , prevents premature setting thereof . in an alternate , and preferred , embodiment the wire 60 defines an induction coil and the piston 31 is formed at least in part of material such as iron which , when subjected to a varying electromagnetic field , will become heated and transfer heat to the cartridge contents . the foregoing description illustrates preferred embodiments of the invention . however , concepts employed may , based upon such description , be employed in other embodiments without departing from the scope of the invention . accordingly , the following claims are intended to protect the invention broadly , as well as in the specific forms shown herein .
a cartridge - type system having a fluid containment in the cartridge which comprises a fluid containing body which is adapted to be attached to a delivery device , the body of the cartridge including preferably electrically energizable heating means , preferably energized through a delivery device , for heating the contents of the cartridge and thus enhancing their deliverability .