Back to results
US 4,665,930 AGranted
Manufacture of ventilated cigarettes
AssigneeMolins Limited
InventorsHugh M. Arthur, John A. Mills, Godfrey A. Wood
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeMolins Limited
InventorsHugh M. Arthur, John A. Mills, Godfrey A. Wood
Estimating the term…
Cigarettes are perforated by being rolled along a row of pins which are excited, for example by being vibrated. Vibration may be towards and away from the cigarettes so that the pins penetrate as a result of the vibration; the depth of penetration may be varied to control the size of the perforations. Alternatively the vibration may be in a direction transverse to the axes of the pins. In either case the pins may be mounted on a flexible member having a resonant frequency equal to the frequency of vibration. The vibratorary drive may be an electro magnetic device or a piexoelectric crystal. An alternative form of excitation of the pins involves passing compressed air through the pins and into the cigarettes, the pins being tubular for that purpose.
A method of perforating cigarettes comprising rolling the cigarettes with respect to a set of pins and vibrating the pins to promote their penetration through the wrappers of the cigarettes, said pins being vibrated at a frequency which is substantially higher than the frequency at which holes are formed in each cigarette.
A method of perforating cigarettes comprising rolling the cigarettes with respect to a set of pins and exciting the pins to promote their penetration through the wrappers of the cigarettes, in which the pins are tubular and the excitation of the pins comprises passing compressed gas through the pins and into the cigarettes.
A cigarette perforating device comprising means for rolling a succession of sideways-moving cigarettes along a row of pins on a perforating member, and means for vibrating the pins to promote their penetration through the wrappers of the cigarettes, said pins being vibrated at a frequency which is substantially higher than the frequency at which holes are formed in each cigarette.
A cigarette perforating device comprising means for rolling a succession of sideways moving cigarettes along a row of tubular pins on a perforating member, and means for passing compressed gas through the pins and into the cigarettes to promote their penetration through the wrappers of the cigarettes.
Dependencies are inferred from the claim text.