Sensing print media size to temperature control a multi-heating

Details Sensing print media size to temperature control a multi-heating Sensing print media size to temperature control a multi-heating

1998-07-30

2000-01-04

Braun, Fred L.

Electrophotography

Control of electrophotography process

Control of fixing

G03G 1520

Patent

active

06011939&

ABSTRACT:
A fixing device control system controls multiple heating elements included in the fuser so that the duty cycle of the power applied to the multiple heating elements results in an optimal temperature profile over the length of the fuser. Multiple thermistors are used in a feedback control circuit to regulate the temperature profile of the fuser. A formatter uses print data from a host to generate data defining the size and location of a printing area on the print media. Using the data defining the size and location of the printing area, the formatter generates a command to send to a controller. The controller applies power to the multiple heating elements in order to generate the fuser temperature profile corresponding to the command. In a first embodiment of the fixing device control system, the formatter generates the command by using the data defining the size and location of the printing area to access information stored in a table. In a second embodiment of the fixing device control system, the formatter computes the command from the data defining the printing area.

REFERENCES:
patent: 4585325 (1986-04-01), Euler
patent: 5049906 (1991-09-01), Kobayashi et al.
patent: 5081493 (1992-01-01), Miyasaka
patent: 5220389 (1993-06-01), Kishimoto et al.
patent: 5303015 (1994-04-01), Sato
patent: 5568229 (1996-10-01), Szlucho

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