Image forming apparatus performing post treatment accompanied with perforation

An image forming apparatus comprising:

• an image forming unit for forming an image on a recording medium;
• an additional image forming unit for forming an additional image on the recording medium by filling a predetermined area including a portion, which is to be perforated, of the recording medium having the image formed thereon;
• a judgment unit for judging whether an image to be formed by the image forming unit and the additional image to be formed by the additional image forming unit are superposed or not;
• and
• an image reduction unit for reducing the image to be formed by the image forming unit when the judgment unit judges that the image and the additional image are superposed.

An image forming apparatus comprising:

• an image forming unit for forming an image on a recording medium;
• an additional image forming unit for forming an additional image on the recording medium by filling a predetermined area including a portion, which is to be perforated, of the recording medium having the image formed thereon;
• a judgment unit for judging whether an image to be formed by the image forming unit and the additional image to be formed by the additional image forming unit are superposed or not;
• and
• a position changing unit for changing a position of the image to be formed on the recording medium by the image forming unit when the judgment unit judges that the image and the additional image are superposed.

An image forming apparatus comprising:

• an image forming unit for forming an image on a recording medium;
• a post treatment unit for performing post treatment accompanied with perforation for the recording medium having the image formed thereon;
• and
• an additional image forming unit for forming an additional image on the recording medium by filling a predetermined area including a portion to be perforated by the post treatment unit, the predetermined area including a filled area which remains on the recording medium following the perforation so as to reinforce the perforated portion.