Image fixing apparatus and image forming apparatus capable...

Details Image fixing apparatus and image forming apparatus capable... Image fixing apparatus and image forming apparatus capable...

2006-09-11

2010-06-08

Gray, David M (Department: 2852)

Electrophotography

Control of electrophotography process

Control of fixing

C399S067000, C399S094000, C399S335000

Reexamination Certificate

active

07734208

ABSTRACT:
An image fixing apparatus controls temperature of a rotating member for fixing with compensation for delay by using a Smith predictor with a controlled object model to reduce temperature ripple effectively. In one example, the image fixing apparatus includes a pair of rotating members to form a nip portion, a heater to heat the rotating member, a temperature sensor to detect temperature of the rotating member, a calculator to calculate a heat value to attain a target temperature of the rotating member, a controller to control the heater based on a calculation result of the heat value with compensation for delay using a model according to the calculation result, and a selector to select a control in which an output of the compensation is input into the calculator or a control in which the output of the compensation is not input into the calculator.

REFERENCES:
patent: 5681494 (1997-10-01), Suzuki et al.
patent: 2005/0201768 (2005-09-01), Tatematsu et al.
patent: 56-069675 (1981-06-01), None
patent: 09-152805 (1997-06-01), None
patent: 2003-167605 (2003-06-01), None
patent: 2004-233543 (2004-08-01), None
patent: 2005-012685 (2005-01-01), None
Machine translation of reference Shirai (JP2004-233543, Listed in IDS).
Machine translation of reference Minamino (JP2003-167605, Listed in IDS).

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