Medium detection method and a medium processing device

Details Medium detection method and a medium processing device Medium detection method and a medium processing device

2011-07-26

2011-07-26

Joerger, Kaitlin S (Department: 3653)

Sheet feeding or delivering

Feeding

By means to convey sheet

C271S265040, C194S334000, C194S335000

Reexamination Certificate

active

07984906

ABSTRACT:
Using detectors, skewed conveyance of sheet media such as checks can be detected accurately regardless of whether part of the conveyed medium is folded over. The biased feed detection unit33of a check processing device1according to at least one embodiment of the invention determines the lengths L1and L2of the conveyed check6(ST31and ST32) and the thickness of a folded part of the check6(ST33) at different positions perpendicular to the transportation direction based on the output of a paper thickness detector25and a length detector26disposed to the check transportation path7. The folded length L3is then subtracted from the difference ΔL of the detected lengths to acquire a corrected difference ΔL1(ST35). If the corrected difference ΔL1is less than or equal to a threshold value D, the medium is determined to be conveyed normally (ST37). If the corrected difference ΔL1exceeds the threshold value D, the medium is determined to be skewed (ST38). Skewed conveyance of the check6can thus be accurately determined.

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