Image forming apparatus employing two printing methods

Details Image forming apparatus employing two printing methods Image forming apparatus employing two printing methods

2006-05-23

2006-05-23

Arana, Louis (Department: 2859)

Electrophotography

Combined with diverse subject matter

With diverse image formation

C399S006000

Reexamination Certificate

active

07050725

ABSTRACT:
An image forming apparatus has a first image forming unit and a second image forming unit that form images by different methods on the same page. The image formed by the second image forming unit is used as an identifying image to distinguish an original document made by the image forming apparatus from copies of the original document. The second image forming unit may, for example, emboss or punch holes in the printing medium. The second image forming unit may accordingly be a serial impact dot matrix printing unit or a stamping unit, while the first printing unit may be, for example, an ink jet printing unit or an electrophotographic printing unit. One of the two image forming units is preferably capable of making copies by printing on multiple-ply forms.

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patent: 5563694 (1996-10-01), Katayama
patent: 5729785 (1998-03-01), Sakaizawa et al.
patent: 5781823 (1998-07-01), Isobe et al.
patent: 6725770 (2004-04-01), Maeda
patent: 09-169474 (1997-06-01), None

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