Apparatus for forming superimposed images
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United States of America Patent
Stats
-
Mar 27, 1990
Grant Date -
N/A
app pub date -
May 19, 1988
filing date -
May 30, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An image forming apparatus for forming superimposed images includes a plurality of image forming devices each for forming a different image and a registration mark, corresponding to the position of the associated image, on an image transferring medium. The registration mark is formed on a transparent part of the medium and is illuminated from below. A detector above the medium detects the position of the shadow of the registration mark for each image and the result of detection is used to adjust the position of at least one image forming device to produce proper registration between the images formed by the respective image forming devices.
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Cited Art Landscape
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