Method for minimizing temperature droop in a fuser

Details Method for minimizing temperature droop in a fuser Method for minimizing temperature droop in a fuser

2008-01-29

2008-01-29

Gray, David M. (Department: 2852)

Electrophotography

Control of electrophotography process

Control of fixing

C399S070000

Reexamination Certificate

active

11217055

ABSTRACT:
A method of controlling a fuser assembly within an image forming apparatus having a fuser assembly including a heating member and a backup member cooperating with the heating member to form a nip therebetween for fusing images onto substrates passing through the nip. The method is provided to minimize or avoid a temperature droop condition of the fuser and includes the steps of determining a set point temperature for performing a fusing operation, and determining whether the image forming apparatus has transitioned from a standby mode to a print mode upon receipt of a print job. If a sensed temperature of the fuser is within a temperature range having an upper threshold temperature that is less than the heating temperature and greater than the set point temperature or a lower threshold temperature, a power control for the fuser is switched to operate in a high power region, increasing power to the fuser, to provide heat energy to the heating member.

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patent: 6927368 (2005-08-01), Cao et al.
patent: 2004/0131375 (2004-07-01), Lee
patent: 2005/0191076 (2005-09-01), Dan

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