Sheet transporting apparatus and printing apparatus

Details Sheet transporting apparatus and printing apparatus Sheet transporting apparatus and printing apparatus

2008-05-06

2008-05-06

Brase, Sandra L. (Department: 2852)

Electrophotography

Control of electrophotography process

Control of fixing

C399S018000, C399S322000

Reexamination Certificate

active

07369786

ABSTRACT:
A sheet transporting apparatus includes: a heating roller and a pressure roller that heats and presses a toner image to fix the toner image onto the sheet; a pressure roller detection unit that detects a contact posture of the rollers; a sheet meander correction mechanism that corrects a meander of the sheet by varying a difference in pressures between the rollers at both ends of the rollers; and a microprocessor that computes and stores the amount of the meander and the amount of correction, wherein the toner is fixed on the sheet when the contact posture is within a fixable range, and wherein when the pressure roller detection unit detects that the contact posture is out of the fixable range during transport of the sheet, the contact posture is controlled to return to a predetermined fixable posture, and the microprocessor corrects an error in the amount of correction.

REFERENCES:
patent: 4419003 (1983-12-01), Fujie et al.
patent: 4890140 (1989-12-01), Negoro et al.
patent: RE34685 (1994-08-01), Negishi et al.
patent: 2003-160262 (2003-06-01), None

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