Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1981-07-16
1983-09-20
Moses, R. L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
118689, 222DIG1, 355 3DD, G03G 1508
Patent
active
044052260
ABSTRACT:
The present invention relates to a developing material supplying control device for an electrostatic copying apparatus which includes an oscillator circuit composed of an oscillation coil provided along a toner supplying passage, a timer, a counter for counting the output signal from the oscillation circuit at every interval predetermined by the timer to supply a discriminating output signal when the counted value is equal to a predetermined value for each of the intervals. A toner supply acts in response to the discriminating output signal from the counter for supplying toner to the toner supplying passage. Since this invention employs the oscillation coil and does not employ a mechanical switch having a movable contact for detecting toner in the toner supplying passage, the toner supplying operation is achieved precisely.
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Hisajima Masahiko
Irie Yoichiro
Kimura Hiroshi
Morimoto Kiyoshi
Shigemura Yutaka
Mita Industrial Company Limited
Moses R. L.
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