Printing press feed mechanism

Details Printing press feed mechanism Printing press feed mechanism

1989-09-27

1991-01-22

Schacher, Richard A.

Sheet feeding or delivering

Special articles

Envelope

271 5, 271 9, 271 99, 271108, 271107, B65H 310

Patent

active

049865226

ABSTRACT:
A device for feeding envelopes or similar work pieces to a printing press or the like utilizes a vacuum chamber mounted on a reciprocably driven roller for removing the lowermost envelope out of a stack of envelopes in a hopper and advancing it to a carrier for conveyance to the printing press. The vacuum is fed to the vacuum drum through an elongated passageway along the axis of the roller and a valve at the input of the vacuum at one end of the roller reciprocates with the roller to open and close the vacuum passageway. Also, a pusher lug is provided to assist in removing heavier stock from the hopper.

REFERENCES:
patent: 3834691 (1974-09-01), Paulson
patent: 4121819 (1978-10-01), Di Francesco
patent: 4583729 (1986-04-01), Blumle

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