Perforation method

Details Perforation method Perforation method

1978-03-15

1980-07-22

Schran, Donald R.

Cutting

Processes

Puncturing

83405, B26F 124, B26F 120

Patent

active

042133610

ABSTRACT:
A method for providing a running web with a perforation pattern fitting into printed image units successively printed on the web. The method includes the steps of performing a longitudinal perforation in a separate longitudinal perforator and performing a transverse perforation in a transverse perforator, wherein the perforation is divided to be carried out by a plurality of separate units. The pitch of the transverse perforation rows in the longitudinal direction of the web is controlled by changing the relative position of the transverse perforation units with respect to each other in accordance with the desired perforation pattern. The transverse perforator can be formed by a plurality of transverse perforation units each having a die roll in cooperation with two needle rolls placed diametrically at opposite sides of the die roll.

REFERENCES:
patent: 3255651 (1966-06-01), Huck
patent: 3866497 (1975-02-01), Wolfberg et al.

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