Methods of making tobacco smoke filter elements

Details Methods of making tobacco smoke filter elements Methods of making tobacco smoke filter elements

1992-04-22

1996-06-04

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 53, 264140, 264148, 264157, 2642101, 264238, B29C 4422

Patent

active

055230369

ABSTRACT:
A particulate plastics material, a polysaccharide and water are fed to an extruder which is operated under such heat and pressure conditions that upon emergence of the extrudate from the extruder die, the extrudate assumes a cross-section greater than that of the exit orifice of the die. The extrudate is then further processed, either by shredding to produce particulate material for feeding to filter-making section of a cigarette making machine, or by forming into smoking article filter rod lengths.

REFERENCES:
patent: 3358695 (1967-12-01), Blakey, Jr. et al.
patent: 4279848 (1981-07-01), Baxter et al.
patent: 4559367 (1985-12-01), Hurps et al.

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