Method of and apparatus for treating a filter tow

Manufacturing container or tube from paper; or other manufacturi – Cigarette filter making – With shaping or compacting of filter material

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Details

493 48, 493 50, 131336, B31C 1300

Patent

active

060597062

ABSTRACT:
A tow of fibrous filter material for tobacco smoke is transported lengthwise through a so-called finger which is an elongated channel wherein the cross-sectional area of the tow is gradually reduced to that of the rod-like filler in the wrapper of a filter rod. The homogeneity of the tow is enhanced by introducing a compressed gas into longitudinally spaced apart gas admitting portions of the channel and by providing the channel with sets of openings for the evacuation of gas downstream of each gas admitting portion. The channel discharges a continuous homogenized tow into a wrapping mechanism wherein the tow is draped into a web of cigarette paper or the like, and the thus obtained filter rod is severed to yield a file of filter rod sections of unit length or multiple unit length.

REFERENCES:
patent: 3974007 (1976-08-01), Greve
patent: 4747814 (1988-05-01), Berger
patent: 4889139 (1989-12-01), Heitmann
patent: 5106357 (1992-04-01), Kampen
patent: 5135008 (1992-08-01), Oesterling et al.
patent: 5203757 (1993-04-01), Kampen
patent: 5282779 (1994-02-01), Sakai et al.
patent: 5387285 (1995-02-01), Rivers
patent: 5725467 (1998-03-01), Chehab et al.

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