Electrophotography – Control of electrophotography process – Control of fixing
Reexamination Certificate
2007-05-15
2007-05-15
Ngo, Hoang (Department: 2852)
Electrophotography
Control of electrophotography process
Control of fixing
Reexamination Certificate
active
11029598
ABSTRACT:
A rotation speed of a heating roller39aand a pressure roller39bis variably controlled by a CPU542based on a sheet size to be printed, a direction the sheet is to be passed, and a number of sheets to be printed. Specifically, variable control of the rotation speeds of the heating roller39aand the pressure roller39bby the CPU542is based on an occurrence of a pass-through area39b1and a non-pass-though area39b2by a sheet of recording paper with respect to a roller lengthwise direction (axial direction) of a position at which the sheet of recording paper passes between the heating roller39aand the pressure roller39b, and controlled based on a thermal expansion coefficient of a roller diameter of the non-pass-though area39b2of the pressure roller39b.
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Iwakura Yoshie
Izumi Hideshi
Kohno Akira
Murakami Susumu
Tomiyori Minoru
Birch & Stewart Kolasch & Birch, LLP
Ngo Hoang
Sharp Kabushiki Kaisha
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