Fuji Xerox Co., Ltd.

Akira Kurimoto

Hiroatsu Kazama

Lights passing in the range of an optical path L1 to an optical path L2 are blocked off by a lead register 201 and, therefore, the light from a light source is prevented from reaching the range of a position P1 to a position P2. Lights in the range of an optical path L2 to an optical path L3 are allowed to pass through the end portion 203a of a platen glass 203. As a result of this, when an edge erasing processing is not executed, if a manuscript A is present in the range of the position P1 to a position P3, then a shadow is recorded in a recording sheet. To avoid this, a reference position RP, which is used as a reference when reading the images of the manuscript A, is set at a position which is more distant from the end portion 203a than the position P3. This prevents the recorded images from being influenced by variations in the quantity of light caused by the lead register 201 and end portion 203a.

Image forming apparatus having a reference position preventing blockage

An image formation apparatus for transferring an image of an original document to a copy paper sheet. Original documents are placed in an original document tray and copy paper sheets are stored in a paper tray. The original document tray has a tray sensor for sensing the original document placed on the original document tray. Upon transferring the original documents to an image scanning apparatus, a regi-sensor measures the length of the original document when the original document is transported to the scanning apparatus. A value corresponding to a transport distance is stored until the original document leaves the tray sensor based on the length of the original document. The tray sensor can sense when the original document is transported more than the transport distance corresponding to the value stored. Paper is fed out of the copy paper sheet tray to the image transfer apparatus when the controller senses the original document.

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Ebina, Japan

Akira Kurimoto