Patent ID: 7095534
Filing Date: 2006-08-22
Classification: H04N

Abstract:
1. A method for positioning a platen glass at a predetermined horizontal position on the casing of an image reader adapted to irradiate an original placed on said platen glass with light beams from a light source lamp, to pick up light beams reflected on the original and thereby to read an image formed on said original, said method comprising steps of: mounting guide plates on the surface of a platen glass so as to guide the horizontal position of an original to be copied; operatively associating one end of the platen glass with a glass retainer adapted to fix the platen glass to the image reader and simultaneously to guide the position of the original; mounting the platen glass on the image reader and actuating said image reader to read an image formed on a predetermined original positioned in a predetermined manner in relation to the guide plates; adjustably shifting said platen glass in a horizontal plane to acquire image data from said predetermined original which corresponds to the data on the predetermined original; securing the platen glass with horizontal positioning blocks selectively engaging the other end of the platen glass to the image reader at the position allowing said predetermined image data to be acquired; and placing said platen glass against said positioning blocks by said glass retainer and securing the retainer to the casing of the image reader, thereby accurately positioning said platen glass.