Apparatus for perforating hollow cylinders

Cutting – Other than completely through work thickness or through work... – Pricking

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83 30, 83 54, 834401, 83660, 83926C, 131281, B26F 124

Patent

active

042928729

ABSTRACT:
Hollow cylinders of relatively rigidized paper are perforated in closely spaced circularly extending, axially spaced rows by perforating adjacent ones of the rows from opposite sides on the cylinders. Apparatus for perforating the cylinders uses a fixed rolling shoe and a rotating drum each of which carry needles to effect perforation. The method and apparatus are especially effective for perforating paper cylinder cigarette mouthpieces.

REFERENCES:
patent: 528696 (1894-11-01), Sergeant
patent: 1958694 (1934-05-01), Chandler
patent: 4020725 (1977-05-01), Climo
patent: 4061148 (1977-12-01), Goslin et al.
patent: 4090826 (1978-05-01), Hinzmann
patent: 4140137 (1979-02-01), Snow
patent: 4184619 (1980-02-01), Stewart et al.
patent: 4193410 (1980-03-01), Williams et al.

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