the holder 10 shown in fig1 - 6 is substantially tubular , with an annular wall 12 . the holder has a first end 14 which is adapted to receive and support a cigarette ( not shown ), and specifically the filter tip or end of the cigarette which would ordinarily be placed between the user &# 39 ; s lips ( also not shown ). the holder 10 has a second end 16 which in use will be placed between the user &# 39 ; s lips . the diameter of the annular wall 12 is larger than the outside diameter of a cigarette . in particular , the diameter of a standard cigarette is 8 mm , and the inner diameter of the annular wall 12 is around 10 mm , and the outer diameter is around 11 . 5 mm . accordingly , when a cigarette is inserted into the first end 14 of the holder 10 , there is substantially a 1 mm gap between the annular wall 12 and the periphery of the cigarette . in order to support the cigarette a number of internal ribs 20 are provided upon the annular wall 12 . in this embodiment there are six ribs 20 , but other embodiments can have three , four , five , or more ribs . as better seen in fig1 and 4 the ribs 20 are substantially triangular in cross - section and terminate at peaks 22 which peaks lie substantially parallel with the longitudinal axis l - l of the holder 10 . the peaks 22 could if desired lie exactly parallel to the longitudinal axis l - l , but in the embodiment shown the holder 10 is slightly tapered , so that the peaks 22 lie on a circle with a diameter of approximately 7 . 8 mm at the first end 14 , converging to a diameter of approximately 7 . 6 mm ( and the wall 12 converges similarly ). the diameter of the circle containing the peaks at the first end 14 is therefore slightly smaller than the diameter of a cigarette , so that in use the ribs 20 deform the periphery of the cigarette slightly so as to ensure the support thereof . the ribs 20 can if desired have their peaks rounded or flattened so as to reduce the likelihood that the paper layer surrounding the filter tip will be tom as the cigarette is inserted into the holder . however , it is desired that the ribs be substantially sharp so that the area of the paper layer which they cover is minimised , so as to minimise the blockage of any perforations which are present in the paper layer , and allow the passage of air through those perforations as intended . it will therefore be understood that the ribs 20 act to hold a cigarette substantially centrally within the holder , with the annular wall 12 spaced from the periphery of the cigarette . accordingly , the regions between the ribs 20 provide passageways 24 along which air can pass along the outside of the cigarette . it will be seen from fig2 and 5 in particular that the ribs 20 extend from the first end 14 to the second end 16 , but in other embodiments the ribs terminate away from either or both of the first and second ends . between the first end 14 and the second end 16 there is a series of walls 26 , each wall 26 lying between a pair of adjacent ribs 20 . the walls 26 close off the respective passageways 24 , and also provide a limitation to the insertion of the cigarette . thus , in use it is intended that the cigarette will be inserted into the holder from the first end 14 until the filter tip engages the walls 26 . the inner diameter of the walls in this embodiment is around 7 . 7 mm . it will therefore be understood that when a cigarette is inserted into the holder 10 , the walls 26 will close off the respective passageways 24 , so that air cannot flow along those particular passageways from the first end 14 to the second end 16 . however , in the embodiment shown one wall is not present ( or has been removed ), so that the passageway numbered 24 in fig4 is open , and air can flow along that passageway from the first end 14 to the second end 16 . the air flowing along the open passageway 24 , in addition to any air flowing though any perforations in the paper layer surrounding the filter tip , will therefore contain little or no smoke , and the proportion of smoke in the breath taken by the user will be correspondingly reduced . it will be understood that different holders can be provided with different numbers of walls removed , or else the walls 26 could be designed to be breakable so that the user can increase the number of open passageways 24 as desired . it is preferably arranged that the combined cross - sectional area of all of the passageways 24 ( when a cigarette is present ) is around 15 mm 2 . the cross - sectional area of a cigarette is around 50 mm 2 . however , the resistance to air flow through the tobacco and filter tip is much greater than that through the passageways , and it is believed that if all of the passageways 24 are open the user will in practice breathe in little or no smoke , i . e . substantially all of the air taken in will pass through the passageways 24 and not through the tobacco . in the embodiment shown the holder 10 has six ribs 20 , and therefore can have up to six walls 26 . six different holders can be provided in a set , with none , one , two , three , four and five walls 26 present , and the user can use the holder with five walls 26 until he or she is accustomed to the reduced smoke intake , and then move onto the holder with four walls 26 present and so on , in an attempt to overcome the addiction to smoking . alternatively , a single holder can be provided with breakable walls 26 as above described . a holder could of course be provided with all six walls 26 present . the use of such a holder would not reduce the proportion of smoke in each breath as all of the passageways 24 would be closed , but it may be necessary or desired by some users so that they become accustomed to using a holder . since the holder 10 is tapered , its second end 16 is not much larger than the filter tip of a cigarette . also , it can be relatively short , ( in this embodiment the distance between the first end 14 and the second end 16 is around 16 mm ). the holder can be colored similar to the filter tip if it is desired to be substantially unobtrusive . the relatively short length of the holder 10 will ensure that in use the first end 14 is very close to the user &# 39 ; s lips and there is little if any likelihood that the user will block any of the passageways 24 with his or her fingers . the holder 10 is preferably made of a plastic material . clearly , the material used must be “ food - grade ” or the like , i . e . suitable for holding between a person &# 39 ; s lips . the material must also not degrade in the presence of the materials in cigarette smoke .
this invention relates to a device which functions as a cigarette holder and can reduce the intake of cigarette smoke into the lungs of a user . the holder is substantially tubular and has a first end for mounting a cigarette , the first end having an annular wall with an internal dimension larger than the diameter of the cigarette , the annular wall carrying a plurality of inwardly - directed longitudinal ribs adapted to engage and support the cigarette . between the ribs are passageways which can allow the flow of air along the outside of the cigarette into the mouth of the user , so that the volume of smoke breathed in by the user can be reduced .