Image forming system with scanner capable of changing magnification of scanned image

An image forming apparatus comprising:

• image reading means for reading a document image to generate an image signal;
• image forming means for forming a copying image corresponding to the image signal supplied from the image reading means, on an image receiving medium;
• feeding means for feeding the image receiving medium to the image forming means;
• magnification setting means for setting a reading magnification when the document image is read by the image reading means;
• and
• timing control means for controlling timing of supply of the image signal from the image reading means to the image forming means such that a size of a margin between a leading edge of the image receiving medium and that of the copying image formed on the image receiving medium is fixed irrespective of the reading magnification.

An image forming apparatus comprising:

• image reading means for reading a document image to generate an image signal;
• image forming means for forming a copying image corresponding to the image signal supplied from the image reading means, on image receiving medium;
• feeding means for feeding the image receiving medium to the image forming means;
• magnification setting means for setting a reading magnification when the document image is read by the image reading means;
• and
• timing control means for controlling timing of feed of the image receiving medium from the feeding means to the image forming means such that a size of a margin between a leading edge of the image receiving medium and that of the copying image formed on the image receiving medium is fixed irrespective of the reading magnification.

An image forming system comprising a scanner for scanning an image of a document to output an image signal and a printer for copying the image onto an image receiving medium in response to the image signal, wherein:

• the system comprises scanning magnification setting means for setting a scanning magnification when the scanner scans the document;
• the scanner includes an image sensor for outputting a signal generated by optically scanning the document in a main scanning direction and a sub-scanning direction perpendicular to the main scanning direction;
• the printer includes sub-scanning start signal generation means for generating a sub-scanning start signal for causing the scanner to start scanning the document in the sub-scanning direction;
• and
• the system is configured so as to change timing at which the sub-scanning start signal generation means generates the sub-scanning start signal in accordance with the scanning magnification set by the scanning magnification setting means.