Coating apparatus – With vacuum or fluid pressure chamber
Patent
1977-10-25
1979-03-20
Stein, Mervin
Coating apparatus
With vacuum or fluid pressure chamber
118 60, 219216, 219469, 432 60, H05B 102
Patent
active
041448359
ABSTRACT:
A contact heat fixing apparatus comprising heat roll 1 having metal core 3 coated with heat resistant toner releasing material 4 on the surface thereof and provided with a heating element to the inside thereof. Temperature control circuit A comprising detection circuit 15 for the detection of the surface temperature of heat roll 1, comparison circuit 16 for comparing the level of a signal issued from said detection circuit 15 with that of a reference signal, pulse generation circuit 17 for converting the signal produced from said comparison circuit 16 into a pulse and an alternating current power source 12 whose electric power to be supplied to said heating element 11 is controlled by the signal from said pulse generation circuit, and switching circuit B for applying, to said temperature control circuit A, control signals which control the surface temperature of said heat roll 1 to set temperature T.sub.1 during a copy stand-by period, to set temperature T.sub.2 lower than said set temperature T.sub.1 during copy operation after a certain period from the start of copy, and again to set temperature T.sub.1 after another certain period from the completion of copy operation.
REFERENCES:
patent: T947012 (1976-01-01), Brandon et al.
patent: 3946199 (1976-03-01), Nakamura
patent: 4001545 (1977-01-01), Wada et al.
patent: 4006985 (1977-02-01), Hutner
patent: 4046990 (1977-09-01), White
patent: 4078166 (1978-03-01), Kitamura et al.
Fukase Yasuji
Nishide Hiroo
Rank Xerox Limited
Stein Mervin
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