Image forming system having sheet hold-down device

Details Image forming system having sheet hold-down device Image forming system having sheet hold-down device

1993-02-08

1993-11-09

Grimley, A. T.

Photocopying

Contact printing

Light boxes

271220, G03G 2100

Patent

active

052607593

ABSTRACT:
An image forming system includes a sheet ejection open tray on which ejected sheets can be collected; and a sheet hold-down device including a sheet hold-down member pivotally mounted on the sheet ejection open tray via a support shaft for pivotal movement in a direction perpendicular to a surface of the sheet ejection open tray, and a hold-down member biasing device for biasing the sheet hold-down member away from the surface of the sheet ejection open tray in opposition to a weight of the sheet hold-down member itself and for maintaining a predetermined urging force of the sheet hold-down member so long as the sheet hold-down member is within a predetermined range of its pivotal movement.

REFERENCES:
patent: 2991999 (1961-07-01), Doerner
patent: 3805971 (1974-04-01), Behrens et al.
patent: 3900192 (1975-08-01), Gibson
patent: 4068839 (1978-01-01), Bullock et al.
patent: 4084809 (1978-04-01), Looney
patent: 5017972 (1991-05-01), Daughton et al.
patent: 5033731 (1991-07-01), Looney
Ernst, IBM Technical Disclosure Bulletin, vol. 23, No. 6, Nov. 1980.
IBM Technical Disclosure Bulletin, "Variable Size Exit Tray", vol. 18, No. 7, Dec. 1975, D. F. Colglazier, et al.

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