G - Physics – 03 – G
Patent
G - Physics
03
G
314/38.5
G03G 15/20 (2006.01)
Patent
CA 1051085
CONTROL CIRCUIT FOR ELECTROSTATIC COPYING MACHINE Abstract of the Disclosure An electrostatic copying machine of the type which includes apparatus for forming a developed graphic image on, for example, a sheet of paper, and includes a heatable enclosure space within which the image bearing paper is disposable and apparatus for heating the space to bond the image to the paper; is provided with a circuit for controlling operation of the machine in con- sideration of the temperature of the enclosure space. The circuit includes a switch for energizing the forming and heating apparatus from a suitable source of electrical power, and a switch for actuating the energized forming apparatus. In addition, the circuit includes apparatus for sensing the temperature of the space and disabling operation of the actuating switch, and thus the forming apparatus, until the enclosure space heats up to a predetermined graphic-image-bonding temperature level. Further, the circuit includes apparatus for preventing disablement of the aforesaid actuating switch until the actuated forming apparatus has been thereafter deenergized; and includes a lamp for visually signalling whether or not the enclosure space has heated up to the predetermined temperature level.
222706
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