Electrophotographic printer

Details Electrophotographic printer Electrophotographic printer

1998-08-28

1999-09-28

Royer, William

Electrophotography

Image formation

Treatment of developed image prior to transfer

G03G 1516

Patent

active

059602406

ABSTRACT:
An electrophotographic printer includes a rotating photoconductive drum, a developing unit, a transfer roller, and a neutralizer. The neutralizer neutralizes a second area of the surface of the photoconductive drum different from a second area in which the toner is applied. A sensor may be provided along the transport path to detect a leading end and a trailing end of the print medium passing along the transport path. In accordance with the sensor output, the neutralizer neutralizes the second area (i.e., top margin and bottom margin) on the photoconductive drum adjacent the leading end and the trailing end of the print medium. A neutralization data generator may be added. The neutralization data generator searches the bit map data for dots which should be printed, and produces neutralization data on the basis of the dots. Then, the neutralizer illuminates only the second area (i.e., areas in which toner is absent) in accordance with the neutralization data. The neutralization data generator inverts bit map data produced by a controller to produce the neutralization data and the neutralizer includes light emitting elements energized in accordance with the neutralization data to illuminated the area in which toner is absent. The neutralization data generator produces the neutralization data such that there is a buffer area surrounding the first area having a predetermined width. The buffer area is not neutralized.

REFERENCES:
patent: 4797707 (1989-01-01), Iwahashi et al.
patent: 5250963 (1993-10-01), Smith et al.
patent: 5585906 (1996-12-01), Takahashi et al.

Affiliated with

Also associated with

Rating

Electrophotographic printer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrophotographic printer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrophotographic printer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-714825