Apparatus for treating webs of filtering material for tobacco pr

Details Apparatus for treating webs of filtering material for tobacco pr Apparatus for treating webs of filtering material for tobacco pr

1974-10-09

1977-01-18

Shore, Ronald J.

Plastic article or earthenware shaping or treating: apparatus

Means imparting irregular denier to filaments

425 66, 425145, 425363, 425369, 425383, 425168, D01D 520

Patent

active

040036847

ABSTRACT:
Improved apparatus for treating a web of fibrous material, usually paper, to render it particularly suitable for making filter plugs for cigarettes, including at least one first pair of meshing rotating rolls provided with longitudinal grooves alternating with longitudinal ribs, which engage the paper and stretch it longitudinally in closely spaced successive narrow transverse areas to loosen and expose fibers without impairing the longitudinal continuity of the paper, and at least one second pair of meshing rotating rolls provided with circumferential grooves alternating with circumferential ribs, which engage the paper and groove it in a direction parallel to its travel while also stretching it transversely to further loosen and expose fibers without impairing the transverse continuity of the web. Preferably the apparatus also includes means for moistening the paper in advance of its passage through the rolls and for drying it after its passage therethrough. Means responsive to the tension on the web also are provided for adjusting the speed of the first pair of rolls relative to the second pair.

REFERENCES:
patent: 2995481 (1961-08-01), Muller
patent: 3161557 (1964-12-01), Muller
patent: 3226280 (1965-12-01), Muller
patent: 3445886 (1969-05-01), Lemoine et al.
patent: 3694537 (1972-09-01), Fairbanks
patent: 3804695 (1974-04-01), Randall et al.
patent: 3852007 (1974-12-01), Levers et al.

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