Printing – Rolling contact machines – Rotary
Patent
1983-03-04
1985-04-23
Eickholt, E. H.
Printing
Rolling contact machines
Rotary
271186, B41F 502, B65H 2900
Patent
active
045122555
ABSTRACT:
A sheet handling mechanism for use in a duplicating machine for duplicating images on both sides of copy sheets including a first printing couple, having an impression cylinder, for transferring a first image to a first side of a copy sheet and a second printing couple for transferring a second image to a second side of the sheet. Mechanism directs each sheet issuing from the impression cylinder in a path away from the first printing couple. Mechanism engages a lead end of each sheet issuing from the directing mechanism and diverts each sheet generally transversely out of the path toward a reversing station. Re-feeding mechanism at the reversing station engages the lead end of the sheet and re-feeds the sheet, trail end first, back into the path whereby the trail end becomes a new lead end of the sheet. Transport mechanism engages the new lead end and transports the sheet toward the second printing couple. A stream of air is directed against the trail end of the sheet as the sheet leaves the diverting mechanism to bias the trail end into engagement with the transport mechanism. The air stream is pulsated in synchronization with issuance of sheets seriatim from the first printing couple whereby air is directed against only the trail end of each sheet as the sheet leaves the diverting mechanism.
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patent: 4365794 (1982-12-01), Roller
patent: 4405125 (1983-09-01), Kulpa
AM International
Camasto Nicholas A.
Eickholt E. H.
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