Sheet stacking device and image forming apparatus

Details Sheet stacking device and image forming apparatus Sheet stacking device and image forming apparatus

2006-09-26

2006-09-26

Crawford, Gene O. (Department: 3651)

Sheet-material associating

Associating or disassociating

Sheet associating

C270S058010, C270S058080, C270S058110, C270S058140

Reexamination Certificate

active

07111839

ABSTRACT:
The present invention relates to a sheet stacking device which stacks sheets thereon, comprising: a buffer unit which allows a preceding sheet to temporarily stay so as to superimpose the preceding sheet and a following sheet one on another; a sheet discharging roller which discharges the sheets superimposed in the buffer unit; and a sheet stacker which stacks the sheets discharged from the buffer unit. The sheets to be discharged in superimposition by the sheet discharging roller is superimposed in a state in which a rear end of a lower sheet in a sheet conveying direction advances in the sheet conveying direction more than a rear end of an upper sheet, and the lower sheet is previously discharged to the sheet stacker.

REFERENCES:
patent: 5112034 (1992-05-01), Uto et al.
patent: 5765824 (1998-06-01), Kawano et al.
patent: 6199850 (2001-03-01), Seki
patent: 6332606 (2001-12-01), Seki
patent: 6845228 (2005-01-01), Suzuki et al.
patent: 2002/0190456 (2002-12-01), Miyake et al.
patent: 2004/0178572 (2004-09-01), Nishimura et al.
patent: 2002-154731 (2002-05-01), None

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