Alarm or warning device for signaling left-behind master or orig

Details Alarm or warning device for signaling left-behind master or orig Alarm or warning device for signaling left-behind master or orig

1981-10-07

1983-08-16

Trafton, David L.

Communications: electrical

Condition responsive indicating system

Specific condition

340673, 340679, 367 93, G08B 1314

Patent

active

043994318

ABSTRACT:
An alarm system for the copying machine for giving the audio or visual alarm signal when an operator leaves a copying machine without taking a master or original out of it after a copying operation. The alarm system includes a master detection means for detecting whether or not a master or original is set on a master or original stand and either a copy detection means for detecting whether or not one or more copies are present in a copy discharge tray or an operator detection means for detecting whether an operator is within a predetermined range from the copying machine. The alarm system is activated if, after a predetermined number of copies have been printed, the copy detection means detects the absence of a copy in the discharge tray or the operator detection means detects that the operator is out of a predetermined range when the master or original detection means detects the presence of the master on the master or original stand, whereby the audio or visual warning signal is given to the operator so as to take out the master or original.

REFERENCES:
patent: 3431549 (1969-03-01), Tullio et al.
patent: 3623058 (1971-11-01), Maloney
patent: 4291301 (1981-09-01), Chan

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