Method and apparatus for perforating an assembled filter used on

Details Method and apparatus for perforating an assembled filter used on Method and apparatus for perforating an assembled filter used on

1977-12-12

1980-02-19

Schran, Donald R.

Cutting

Other than completely through work thickness or through work...

Pricking

83866, 83170, 131 23R, 131170R, A24C 550

Patent

active

041888472

ABSTRACT:
This invention relates to a method and apparatus for perforating the walls of an assembled filter element used on smoking products including a continuously moving conveying means for receiving a plurality of said filter elements and means for retaining said assembled filter elements on said conveying means, a plurality of piercing elements positioned at right angles to the direction of movement of said assembled filter elements, and a means for manipulating the piercing elements so that it penetrates and withdraws from the walls of the filter element.

REFERENCES:
patent: 3831476 (1974-08-01), Noren et al.
patent: 3847044 (1974-11-01), Rudszinat
patent: 4061148 (1977-12-01), Goslin et al.

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