Medium discrimination device, image forming apparatus, and...

Details Medium discrimination device, image forming apparatus, and... Medium discrimination device, image forming apparatus, and...

2006-01-09

2008-10-28

Punnoose, Roy M (Department: 2886)

Optics: measuring and testing

Document pattern analysis or verification

C356S432000

Reexamination Certificate

active

07443490

ABSTRACT:
A medium discrimination device includes a transmitted light quantity measurement device arranged to measure a transmitted light quantity in a thickness direction of a printing medium on a conveyance route, and configured to perform a measurement of the transmitted light quantity at each time the printing medium is conveyed, a measurement value memory device storing a result of the measurement performed by the transmitted light quantity measurement device, a medium setting device configured to previously set a type of printing medium to be used, a medium information memory device storing information of a transmitted light quantity assigned to each printing medium to be set by the medium setting device, and a control processing unit configured to perform paper type detection on a first printing medium, and double feed detection on following printing mediums.

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Patent Abstracts of Japan, JP 06-056312, Mar. 1, 1994.
Patent Abstracts of Japan, JP 2003-137457, May 14, 2003.

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