Print head and image forming apparatus

Details Print head and image forming apparatus Print head and image forming apparatus

2006-02-07

2006-02-07

Hirshfeld, Andrew H. (Department: 2854)

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

C347S132000, C347S237000, C347S238000

Reexamination Certificate

active

06995781

ABSTRACT:
A print head comprises a plurality of light emitting devices which are arranged such that the adjacent light emitting devices are stepped from each other in the rotation direction of a photosensitive member, or a plurality of light emitting devices which are disposed linearly such that the light emitting devices emit light at different timings each other by employing a delay mechanism. Consequently, it is possible to provide the output pattern capable of directing the human eyes in two dimensions so as to reduce the visible difference in the image density.

REFERENCES:
patent: 4435064 (1984-03-01), Tsukada et al.
patent: 4575739 (1986-03-01), De Schamphelaere et al.
patent: 4589745 (1986-05-01), Plummer
patent: 5258629 (1993-11-01), Itoh et al.
patent: 6002420 (1999-12-01), Tanioka et al.
patent: 6215511 (2001-04-01), Asako et al.
patent: 6563526 (2003-05-01), Sekiya et al.

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