Photocopying – Including fiber optics
Patent
1985-04-24
1986-06-03
Prescott, A. C.
Photocopying
Including fiber optics
355 14D, 222 64, 430122, 118657, G03G 1508
Patent
active
045926425
ABSTRACT:
A developing material amount detecting apparatus for detecting an amount of developing material contained in a tank includes a detection member provided inside the tank movably between a settled position and a raised position, toner feeding vane for periodically sending the detection member from the settled position to the raised position, and a switch which turns on when the detection member is held substantially in the settled position and turns off when the detection member is held substantially in a position other than the settled position. The apparatus further includes a timer for counting a predetermined time length. The timer starts counting when the switch is turned off. When the switch is maintained off for a time length longer than the predetermined time length, it is indicated that the amount of developing material inside the tank is more than a predetermined amount.
REFERENCES:
patent: 4026643 (1977-05-01), Bergman
patent: 4200665 (1980-04-01), Suzuki et al.
patent: 4210864 (1980-07-01), Miyakawa et al.
patent: 4270487 (1981-06-01), Terashima et al.
patent: 4277003 (1981-07-01), Tabuchi et al.
patent: 4341461 (1982-07-01), Fantozzi
patent: 4348100 (1982-09-01), Snelling
patent: 4506804 (1985-03-01), Oka
Imaizumi Masaru
Tanaka Kenzou
Minolta Camera Kabushiki Kaisha
Prescott A. C.
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