Duplicating machine with duplexing capability

Details Duplicating machine with duplexing capability Duplicating machine with duplexing capability

1982-11-22

1984-04-17

Prescott, A. C.

Photocopying

Including fiber optics

355 14SH, 355 3DR, 355 23, 355 24, 101218, 101223, 101230, 101411, 271 69, 271184, 271225, 271DIG9, G03G 1500

Patent

active

044430949

ABSTRACT:
In a duplicating machine for duplicating images on both sides of copy sheets including a blanket cylinder and an impression cylinder, a mechanism for handling the sheets and re-feeding the sheets back to the impression cylinder for duplex copying. The blanket cylinder has first and second images transferable to the copy sheets. The impression cylinder forms a nip with the blanket cylinder for transferring the copy sheets through the nip. A first gripper on the impression cylinder releasably engages a lead end of a copy sheet and moves the sheet through the nip to transfer the first image on a first side of the sheet. A chain gripper releasably engages the lead end of the sheet transferred thereto by the first gripper and transports the sheet away from the impression cylinder. A swing gripper releasably engages a trail end of the sheet in timed relation with release of the sheet by the chain gripper and re-feeds the sheet back to the impression cylinder. A second gripper on the impression cylinder releasably engages the trail end of the sheet and moves the sheet through the nip to transfer the second image to a second side of the sheet.

REFERENCES:
patent: 3012500 (1961-12-01), Koch
patent: 3557391 (1970-11-01), Mowry
patent: 3672765 (1972-06-01), Altmann
patent: 3796154 (1974-03-01), Weisgerber
patent: 3865362 (1975-02-01), Luffy et al.
patent: 4026647 (1977-05-01), Kanno et al.
patent: 4155545 (1979-05-01), Yanagawa et al.
patent: 4299473 (1981-11-01), Endo
patent: 4336992 (1982-06-01), Szlucha et al.

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