Self-triggering quality control sensor

Details Self-triggering quality control sensor Self-triggering quality control sensor

G - Physics

03

G

314/7, 340/123.4

G03G 15/00 (2006.01) G03G 15/08 (2006.01)

Patent

CA 1172304

B0980022 Abstract of the Disclosure A system for checking copy quality variables within an electrophotographic copier machine involving the production of a developed sample test area and a base reference test area on a photoreceptive surface. An optical transducer is used to view the test area and circuits are provided to produce an output signal indicative of quality. The circuit triggers itself by detecting a substantial change in tranducer produced signal level when the sample test area is viewed, thus negating the requirement that the test circuits be operated under the control of the machine.

388866

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