Browse Prior Art Database

Charge-Control Paper Guide for Electrophotographic Printer

IP.com Disclosure Number: IPCOM000119366D
Original Publication Date: 1991-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Horrall, PD: AUTHOR [+2]

Abstract

Disclosed is a sawtooth, paper guide which is novel due to its combined function of guiding paper, preventing accumulation of electrostatic charge, and removing charge which has been deposited onto the paper. The guide is positioned after the transfer station of an electrophotographic (EP) printer. The guide has particular utility in preventing triboelectric charging of paper against the clear lens of an erase lamp located at the transfer station.

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This is the abbreviated version, containing approximately 80% of the total text.

Charge-Control Paper Guide for Electrophotographic Printer

      Disclosed is a sawtooth, paper guide which is novel due
to its combined function of guiding paper, preventing accumulation of
electrostatic charge, and removing charge which has been deposited
onto the paper.  The guide is positioned after the transfer station
of an electrophotographic (EP) printer.  The guide has particular
utility in preventing triboelectric charging of paper against the
clear lens of an erase lamp located at the transfer station.

      The sawtooth paper guide preserves print quality by reducing or
eliminating electrostatic interaction between the charged toner and
the otherwise highly-charged paper. Toner smearing created by an
electrostatic interaction would otherwise cause unacceptable print
quality.  The sawtooth guide preserves print quality over a wide
range Continued of papers and environments.

      The sawtooth guide accomplishes two functions.  Refer to the
figure.

      First, the guide positions the paper slightly above the lens.
This prevents triboelectric charging of the paper and lens by
preventing scrubbing of the paper against the lens. Charge on the
paper is reduced and the likelihood of toner smearing is also
reduced.

      Second, charge deposited on the paper at the transfer station
is partially removed by the sawtooth portion of the guide.  This
charge is removed by passing the paper in close proximity to the
grounded row of sharp, pointed...