Heat fixing roll for copying machine, method of producing the sa

Details Heat fixing roll for copying machine, method of producing the sa Heat fixing roll for copying machine, method of producing the sa

1990-05-18

1991-11-12

Grimley, Arthur T.

Photocopying

Contact printing

Light boxes

29895, 219216, 355285, G03G 1520

Patent

active

050651935

ABSTRACT:
A heat fixing roll for a copying machine includes an insulating layer formed on the surface of a hollow tube, a heating resistor layer formed on the surface of the insulating layer by uniformly thermal spray coating a resistor material, a screw-like heating resistor formed by forming a helical groove having a depth reaching the surface of the insulating layer by using a laser irradiation head connected to an electric resistance compensator, and an antisticking layer formed on the surface of the resistor and the groove by coating. The present invention also provides a method of producing the heat fixing roll and an electronic copying machine provided with the roll.

REFERENCES:
patent: 958144 (1910-05-01), Lockwood
patent: 4170726 (1979-10-01), Okuda
patent: 4743940 (1988-08-01), Nagasaka et al.
patent: 4806731 (1989-02-01), Bragard
patent: 4866826 (1989-08-01), Koide

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