Photocopying – Contact printing – Light boxes
Patent
1992-10-22
1994-11-15
Grimley, A. T.
Photocopying
Contact printing
Light boxes
340679, 355309, G03G 2100
Patent
active
053653114
ABSTRACT:
An image forming system including a laser printer and optional devices. The laser printer has a control section. The optional devices each have an upper device switch. Status data items are supplied from the optional devices to the control section. The data generated by the upper device switch of the optional device, showing whether or not the optional device is mounted on the device, is also supplied to the control section. Further, data generated by the upper device switch of the device and showing whether or not the optional device is mounted on the device are supplied to the control section. In addition, status data items are supplied from the optional devices to the control section. Based on the various data items received, the control section determines, with high accuracy, whether or not the optional devices are connected to the laser printer.
REFERENCES:
patent: 5049946 (1991-09-01), Harada
patent: 5063410 (1991-11-01), Kimoshita et al.
patent: 5103259 (1992-04-01), Saitoh et al.
Grimley A. T.
Kabushiki Kaisha Toshiba
Lee Shuk Y.
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