Original feeding device
AssigneesCanon Kabushiki Kaisha, Canon Aptex Inc.
InventorsShunji Sato, Kimiaki Hayakawa, Yoshihiko Kitahara, Kenichi Iizumi, Noriaki Nakazawa
Life of this patent
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Abstract
An original feeding device for feeding OHP originals to the display stage of an overhead projector is capable of transportation control suitable for OHP projection. The originals are transported by a conveying film onto the display stage. In order to stop the original at the center of the display stage, after the original is detected by the registration sensor, the conveying film is advanced by an amount equal to the sum of the distance from the registration sensor to the display stage, a half of the length of the display stage and a half of the length of the original.
Claims12
An original feeding device for consecutively feeding a plurality of originals to a display stage of a projecting apparatus for projecting the image of the original placed on the display stage, comprising:
- original length detecting means for detecting length of the original;
- transport means for consecutively transporting the plurality of originals one by one onto said display stage;
- and
- control means for activating said transport means, after a front end of the original transported by said transport means passes an end portion of said display stage, by an amount corresponding to the sum of one half of the length of said display stage and one half of the length of the original detected by said original length detecting means,
- wherein said control means is adapted to control the transportation of the originals in such a manner that the distance from a rear end of an original to a front end of a next original becomes at least equal to a distance, obtained by subtracting one half of the length of the original detected by said original length detecting means from one half of the length of the display stage.
An original feeding device for feeding originals to a display stage of a projecting apparatus for projecting the image of the original placed on the display stage, comprising:
- a first transparent belt wound on a first roller;
- a second transparent belt wound on a second roller, said second transparent belt being overlapped with said first transparent belt on the display stage;
- stacking means for stacking the originals;
- feeding means for feeding the originals on said stacking means one by one to be sandwiched between said first transparent belt and said second transparent belt;
- a third roller for winding up said first and second transparent belts as said first transparent belt and said second transparent belt sandwich the originals;
- detecting means for detecting a mark provided on one of said first or second transparent belts to indicate a home position of said first and second transparent belts;
- and
- control means for controlling winding by said first and second rollers or winding by said third roller in accordance with a detection result of said detecting means.
Dependencies are inferred from the claim text.