Copying machine having a mechanism for feeding recording sheets

Details Copying machine having a mechanism for feeding recording sheets Copying machine having a mechanism for feeding recording sheets

1997-03-27

1998-08-18

Brase, Sandra L.

Electrophotography

Document handling

Copy

27126501, 399374, 399388, G03G 1500, B65H 704

Patent

active

057970807

ABSTRACT:
A copying machine allowing high copying efficiency and reliability by feeding recording sheets from any of a plurality of recording sheet storage regions to an image transfer region at a constant timing. Recording sheets stored in a cassette are fed one by one to a conveyance path by a sheet feed roller. The recording sheets P retained in an intermediate tray are fed one by one to a conveyance path by a sheet feed roller. The timings at which the sheet feed rollers, which are first drive rollers, are driven are controlled in such a way that a register roller, which is a second drive roller, can be driven at a constant cycle time with respect to a plurality of recording sheets fed from the conveyance path. Even when the cassette and the tray are switched over, the register roller is driven always at a constant cycle time. Thus, the image forming operation can be executed by feeding recording sheets in synchronization with the image-reading timing.

REFERENCES:
patent: 4914485 (1990-04-01), Emori
patent: 4918489 (1990-04-01), Inage et al.
patent: 4980729 (1990-12-01), Okamoto
patent: 5056771 (1991-10-01), Beck et al.
patent: 5155540 (1992-10-01), Yamada et al.
patent: 5257064 (1993-10-01), Okamoto
patent: 5323220 (1994-06-01), Yasuda
patent: 5528353 (1996-06-01), Ushio et al.

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