PAPER SHEET DETECTOR FOR ELECTROPHOTOGRAPHIC DEVICE

PROBLEM TO BE SOLVED: To surely detect various kinds of paper sheets at low cost without lowering the reliability by providing an attaching position of an optical receiver in relation to an optical projector deviated relatively in the horizontal and vertical directions. SOLUTION: A primary light emi...

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Bibliographic Details
Main Authors IWANAGA HIDEKI, TAKAHASHI KUNITOMO, YAMAZAKI AKIHIKO, HIROSE YOJI, YOKOGAWA HIDEHO
Format Patent
LanguageEnglish
Published 03.06.1997
Edition6
Subjects
CINEMATOGRAPHY
CONVEYING
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HANDLING THIN OR FILAMENTARY MATERIAL
HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES
HOLOGRAPHY
MAGNETOGRAPHY
PACKING
PERFORMING OPERATIONS
PHOTOGRAPHY
PHYSICS
STORING
TRANSPORTING
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Summary:PROBLEM TO BE SOLVED: To surely detect various kinds of paper sheets at low cost without lowering the reliability by providing an attaching position of an optical receiver in relation to an optical projector deviated relatively in the horizontal and vertical directions. SOLUTION: A primary light emitted from an optical projector 1 is reflected on a mirror 3 so as to be a secondary light without having a printing paper sheet and it enters into an optical receiver 2 so as to detect that there is no paper. On the contrary, when the paper sheet 5 is existed between the optical projector 1 and the mirror 3, the primary light is shielded by the paper sheet so as to generate no secondary light. When the primary light passes through a hole such as a file hole, a bind hole, etc., provided in the paper sheet, it is shielded by a paper sheet between the mirror 3 and the optical receiver 2 so that the optical receiver 2 senses no light. In the figure, the optical projector 1 and the optical receiver 2 are fixed in such a state as deviated to the vertical direction and both of the primary and the secondary lights are provided with vertical components as well as the horizontal components so that error detection of 'no paper', occurring when the primary and the secondary lights pass through the hole, is reduced.
Bibliography:Application Number: JP19950299693