Patent Document ID: 5530560
Application ID: 08358512
Patent Status: 1

Claim One:
1. An image forming apparatus having a two-face copy mode wherein document images are formed on front and back faces of a paper, which apparatus comprises: a document direction setting means for setting a direction of an image in a document; a margin setting means for setting a first margin position for a document image on the front face in a reproduced image on a paper and for setting a second margin position for another document image on the back face in another reproduced image on the paper, said second margin position being determined as a position opposite to the first margin position such that said first and second margin positions together define a margin on said paper; an image reader for detecting a document image and for providing digital image data thereof; an image memory for receiving the digital image data provided by said image reader and for storing said received digital image data; a rotation angle determination means for determining a rotation angle according to the document direction set by said document direction setting means and the first and second margin positions set by said margin setting means so that images can be observed in a normal orientation on the front and back faces of the paper if the paper is turned over by fixing it at the margin; a reading and rotation means for reading the digital image data from said image memory and for rotating the read digital image data by the rotation angle determined by said rotation angle determination means; and an image forming means for receiving the digital image data from said reading and rotation means and for forming images on the front and back faces of the paper.