Photocopying – Including fiber optics
Patent
1987-09-15
1988-05-10
Prescott, A. C.
Photocopying
Including fiber optics
355 14FU, 219216, 428 36, 29611, G03G 1500
Patent
active
047439408
ABSTRACT:
A thermal fixing roller for use in a copying machine and a method for manufacturing the thermal fixing roller are disclosed. An insulator layer is formed on an outer surface of a cylindrical metallic pipe, a masking wire material is wound in a spiral manner on the surface of the insulator layer and a heat-generating resistor is formed by spray coating heat-generating resistor material on the insulator and wire surfaces. Thereafter the wire material is removed to leave a groove at its trace, and thereby the above-mentioned heat-generating resistor can be formed in a spiral shape. By choosing pitches at the opposite end portions of this spiral resistor smaller than that at the central portion thereof, uniform temperature is maintained over the entire length of the thermal fixing roller. Also by forming a cross-section configuration of the masking wire material in a rectangular shape, it is allowed to reduce the width of the above-mentioned groove to minimum.
REFERENCES:
patent: 4395109 (1983-07-01), Nakajima et al.
patent: 4438321 (1984-03-01), Moran
patent: 4540267 (1985-09-01), Moser
patent: 4611902 (1986-09-01), Schon
patent: 4628183 (1986-12-01), Satomura
Fujita Kazunori
Itoh Tsutomu
Kitoh Masayuki
Nagasaka Hideo
Saitoh Hiroshi
Onoda Cement Company, Ltd.
Prescott A. C.
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