Preparing cigarette filters

Details Preparing cigarette filters Preparing cigarette filters

1975-11-20

1978-06-20

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Forming continuous work followed by cutting

131 103, 131 105, 131261B, 264157, 264167, 264174, 264284, A24C 550

Patent

active

RE0296740

ABSTRACT:
Cigarette filters are made by passing a continuous rod of filter material continuously through a moving die to form a continuous filter element having a repeated pattern of staggered grooves so arranged that the continuous filter element can be cut at regular intervals to form individual filter elements each having in its peripheral surface a number of grooves extending substantially axially alternately from opposite ends of the element.

REFERENCES:
patent: 1967585 (1934-07-01), Minton
patent: 2033867 (1936-03-01), Segal
patent: 2931748 (1960-04-01), Muller
patent: 2954773 (1960-10-01), Lebert
patent: 2979433 (1961-04-01), MacHenry
patent: 3180911 (1965-04-01), Muller
patent: 3520963 (1970-07-01), Allseits et al.
patent: 3538210 (1970-11-01), Gatto
patent: 3546325 (1970-12-01), Muller
patent: 3579623 (1971-05-01), Thomson et al.
patent: 3637447 (1972-01-01), Berger et al.

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