Photocopying – Contact printing – Light boxes
Patent
1993-09-24
1994-09-13
Grimley, A. T.
Photocopying
Contact printing
Light boxes
271 9, 271153, 271258, 355308, G03G 1500, G03G 2100
Patent
active
053473507
ABSTRACT:
A sheet feeder includes a feeder for feeding a sheet, a cassette for containing a plurality of stacks of small sized sheets side by side therein, the cassette including a plurality of biasing members for biasing the respective stacks of small sized sheets upwards so as to bring uppermost sheets of the respective stacks into contact with the feeder, a plurality of sheet detectors arranged in positions corresponding to the respective stacks of sheets for detecting the height of the respective stacks of sheets contained in the cassette, and a controller responsive to the plurality of sheet detectors for determining the absence of sheet in the cassette when at least one of the plurality of sheet detectors detects that the height of the stack has become lower than a predetermined height, and stopping a sheet feeding operation. This sheet feeder prevents the transfer device of an image forming apparatus from being smeared due to the fact that the small sized sheet is fed from only one stack.
REFERENCES:
patent: H21 (1986-02-01), Schieck
patent: 4229113 (1980-10-01), Anderson et al.
patent: 4472049 (1984-09-01), Honma et al.
patent: 4524691 (1985-06-01), Miller
patent: 4535463 (1985-08-01), Ito et al.
patent: 4603846 (1986-08-01), Miles
patent: 4733310 (1988-03-01), Kapp et al.
patent: 4860055 (1989-08-01), Ohira et al.
patent: 4991830 (1991-02-01), Yamanaka
patent: 5076562 (1991-12-01), Sai et al.
patent: 5102112 (1992-04-01), Takahashi
patent: 5104111 (1992-04-01), Matsuda et al.
Fuchi Masami
Kubota Hiroshi
Makiura Yoshinori
Migita Kouji
Nakahata Akinobu
Brase Sandra L.
Grimley A. T.
Mita Industrial Co. Ltd.
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