Electrophotographic copying device

Abstract

An electrophotographic copying machine using a roll of sensitive paper in which the original holder for carrying the original reciprocates on the machine case of the electrophotographic copying device. While the original holder is in its backward motion, the original is illuminated so as to subject the electrophotographic-sensitive paper to a slit exposure, and the copy is obtained through subsequent steps of developing and fixing. The reciprocating motion of the original is related to the paper feed so that the paper is cut to the length of the original. An indicator is provided for indicating the size of the roll of sensitive paper in the paper-feeding unit and for indicating the maximum size original capable of being copied.

What is claimed is: 
     
       1. An electrophotographic copying device comprising in combination a reciprocally movable holder for supporting an original, said holder having a visible reference for locating relative thereto one edge of the area of an original to be copied, an adjustable index member positionable alongside said original adjacent the opposite edge of said area to be copied, means for holding a supply roll of copying material, electromechanical cutoff means, means for feeding said copying material from said roll over a predetermined path past said cutoff means to an exposure station including separate feed means located before and after said cutoff means, means operable while said holder is moving for projecting an image from an original supported on said holder upon said copying material as the latter passes through said exposure station, means for developing and fixing said image on said copying material after it is exposed, means for feeding said copying material from said exposure station through said developing and fixing means, switch means for controlling both said cutoff means and that feed means which is located before said cutoff means to simultaneously sever said copying material and interrupt the feeding of said material from said roll, and means interrelating said adjustable index member with said switch means for causing said switch means to be actuated after said holder has moved during projection of said image a distance equal to the difference between the length between said edges of said area to be copied and the length of said predetermined path from said cutoff means to said exposure station. 
     
     
       2. An electrophotographic copying device according to claim 1, wherein said means interrelating said adjustable index member with said switch means comprises means mounting both said index member and said switch means for movement along a path parallel to the path of movement of said holder, a continuous belt interconnecting said switch means with said index member for reciprocal movement toward or away from each other, and a cam element carried by said holder for actuating said switch means as it moves past while an image is being projected. 
     
     
       3. An electrophotographic copying device according to claim 1, wherein said means interrelating said adjustable index member with said switch means comprises means mounting said index member on said holder for adjustable movement relative to said holder along a path parallel to the path of movement of said holder, means mounting said switch means adjacent the path of travel of said index member when the latter is carried by said holder during movement of the holder, and means associated with both said index member and said switch means for actuating said switch means as it is passed by said index member while an image is being projected. .Iadd. 4. An electrophotographic copying device comprising in combination a reciprocally movable holder for supporting an original, said holder having a visible reference for locating relative thereto one edge of the area of an original to be copied, an adjustable index member positionable alongside said original adjacent the opposite edge of said area to be copied, means for holding a supply roll of copying material, electromechanical cutoff means, means for forming on said copying material an image of said area to be copied, means for feeding said copying material from said roll over a predetermined path past said cutoff means to said image forming means including separate feed means located before and after said cutoff means, said image forming means including exposure means operable while said holder is moving for projecting an image from an original supported on said holder, for use in forming the image upon said copying material as the latter passes through said image forming means, switch means for controlling both said cutoff means and that feed means which is located before said cutoff means to simultaneously sever said copying material and interrupt the feeding of said material from said roll, and means interrelating said adjustable index member with said switch means for causing said switch means to be actuated after said holder has moved during projection of said image a distance equal to the difference between the length between said edges of said area to be copied and a predetermined length through which said copying material extends beyond said cutoff means at the commencement of said projection of said image. .Iaddend.