Printing – Rolling contact machines – Rotary
Patent
1988-02-26
1990-03-06
Crowder, Clifford D.
Printing
Rolling contact machines
Rotary
101228, 226 6, 226 74, 400577, 4006162, 400618, B41F 1302, B41J 1130
Patent
active
049055976
ABSTRACT:
A strip provided adjacent the edges thereof with perforations is driven forwards during a printing operation by the cooperating printing and counter-pressure cylinders of an offset mechanism, and by two pairs of pin tractors, pins of which enter the somewhat larger perforations. When the cylinders release the strip, same is moved backwards by the pin tractors over a distance equal to the difference between the forward displacement and the length of a form. To position the strip before a new printing operation, those pins going through the perforations of the pin tractors are moved a little forwards until they lie anew frontwards in the perforations.
REFERENCES:
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patent: 3543982 (1970-12-01), Sargent
patent: 3797389 (1974-03-01), Wolff
patent: 4095731 (1978-06-01), Harding et al.
patent: 4153191 (1979-05-01), Bishop
patent: 4328749 (1982-05-01), Inouye et al.
patent: 4512256 (1985-04-01), Schriber et al.
patent: 4742772 (1988-05-01), Grose
patent: 4751879 (1988-06-01), Van Pelt
patent: 4775087 (1988-10-01), Moser et al.
Crowder Clifford D.
Web Converting Equipment N.V.
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