Electrophotography – Control of electrophotography process – Control of fixing
Reexamination Certificate
2008-01-29
2008-01-29
Gray, David M. (Department: 2852)
Electrophotography
Control of electrophotography process
Control of fixing
C399S070000
Reexamination Certificate
active
07324771
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: 2005/0191076 (2005-09-01), Dan
Lemaster John
Murphy Calvin D.
Gray David M.
Lexmark International Inc.
Stevens & Showalter L.L.P.
Walsh Ryan D.
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