Photocopying – Contact printing – Light boxes
Patent
1994-10-25
1996-04-09
Brase, Sandra L.
Photocopying
Contact printing
Light boxes
355285, G03G 1520
Patent
active
055066674
ABSTRACT:
An image-fixing apparatus including a presser roller; a heater roller held in contact with the presser roller to provide a nipper for nipping a recording sheet bearing an unfixed image thereon, an electric resistance of the heater roller decreasing as respective contact areas of the heater and presser rollers which areas define the nipper increase; a supplying device which supplies an electricity to the heater roller so that the nipper generates a thermal energy to thermally fix the unfixed image on the recording sheet; a measuring device which measures the electricity supplied from the supplying device to the heater roller; and a sheet-jamming detecting device which detects a jamming of the recording sheet at the nipper, based on the electricity measured by the measuring device.
REFERENCES:
patent: 4471210 (1984-09-01), Van Den Eijnden
patent: 5045887 (1991-09-01), Nakamura
patent: 5138379 (1992-08-01), Kanazashi
patent: 5149941 (1992-09-01), Hirabayashi et al.
patent: 5276482 (1994-01-01), Nakanishi
patent: 5283621 (1994-02-01), Hashizume
patent: 5361124 (1994-11-01), Rowe et al.
patent: 5402211 (1995-03-01), Yoshikawa
patent: 5412453 (1995-05-01), Matsuo
Brase Sandra L.
Brother Kogyo Kabushiki Kaisha
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