Sheet feeder device and image forming apparatus

Details Sheet feeder device and image forming apparatus Sheet feeder device and image forming apparatus

2004-06-24

2008-12-16

Joerger, Kaitlin S (Department: 3653)

Sheet feeding or delivering

Feeding

Separators

C271S117000

Reexamination Certificate

active

07464924

ABSTRACT:
A sheet feeder device is provided with a pick-up roller driving section which is operative to position the pick-up roller into a retracted position spaced a predetermined distance apart from a stack of document sheets on a document tray before and after the operation for feeding the series of document sheets, into a sheet feed position in which the pick-up roller abuts against the stack of document sheets for feeding the document sheets at an occasion of feeding of each of the document sheets in the operation for feeding the series of document sheets, and into the standby position above and close to the height of a stack of a maximum load number of document sheets carried on the document tray during a period from a point in time just after feeding of one sheet to a point in time just before feeding of a succeeding sheet.

REFERENCES:
patent: 4822023 (1989-04-01), Miyoshi
patent: 5435537 (1995-07-01), Gysling
patent: 5842694 (1998-12-01), Brooks et al.
patent: 6554270 (2003-04-01), Yamamoto
patent: 02-231320 (1990-09-01), None
patent: 2001-220026 (2001-01-01), None
patent: 2001-146329 (2001-05-01), None

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