Horizontal scanning device able to scan a bar code label on an underside or on a standing side wall of an article
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United States of America Patent
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Apr 23, 2002
Grant Date -
N/A
app pub date -
Aug 11, 1999
filing date -
Nov 29, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A horizontal scanning device capable of scanning a bar code label on an underside or on a standing side wall of an article is revealed. The device is made of a source of laser light; a rotatably drivable polygonal mirror with mirror surfaces for distributing in scan lines the laser light transmitted by the laser source; a number of fixedly disposed mirrors for reflecting through a window the laser light beam distributed by the polygonal mirror, wherein the polygonal mirror has at least one mirror surface in co-action with a fixedly disposed mirror and at least one laser light beam is directed through the window at the article, which line extends for at least a moment substantially vertically to that window and the projection of which onto the article moves substantially in the plane perpendicular to that window and through that vertical line; and a detector for receiving light scattered by the code.
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