Printing – Rolling contact machines – Rotary
Patent
1987-03-18
1988-06-21
Eickholt, Eugene H.
Printing
Rolling contact machines
Rotary
226 8, 226143, 493411, B41F 1354
Patent
active
047518790
ABSTRACT:
A system is provided for intermittently processing successive definite lengths of flexible sheet material in continuous web form, e.g., tractor-fed computer printout paper, with nearly tensionless transport of the web through web feeding operations, cyclical web processing and driving operations, and web delivery operations, that are not speed-interdependent. For each processing cycle, with the web extended without slack through an upstream lead to a processing station where a certain length of the web is positioned to be next processed, an excess length of loose web is fed into that lead, typically forming a loop in it; then the certain web length is processed and driven forward a distance shorter than the length of loose web; and then web is retracted from the upstream lead to remove the residual loose web and leave a next certain web length in position to be processed. The processed web is delivered and may be folded into a pack as a downstream lead of it is made slack by web driven from the processing station. The system enables increased speeds of offset printing of paper such as continuous computer printout forms.
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Eickholt Eugene H.
Johnston Albert C.
Van Pelt Equipment Corporation
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