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Browse Prior Art Database

Fuser Hot Roll for Edge-Fed Paper Path

IP.com Disclosure Number: IPCOM000101088D
Original Publication Date: 1990-Jun-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Hamilton, DC: AUTHOR [+3]

Abstract

Disclosed is a fuser hot-roll design for an electrophotographic (EP) printer which feeds paper and envelopes referenced to an edge of the paper path. The design includes a saddle-shaped hot roll with the minimum diameter closer to the paper reference edge. The spring force applied to each end of the backup roll is unbalanced for best performance; the smaller spring force is at the paper reference edge of the fuser.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 96% of the total text.

Fuser Hot Roll for Edge-Fed Paper Path

       Disclosed is a fuser hot-roll design for an
electrophotographic (EP) printer which feeds paper and envelopes
referenced to an edge of the paper path.  The design includes a
saddle-shaped hot roll with the minimum diameter closer to the paper
reference edge.  The spring force applied to each end of the backup
roll is unbalanced for best performance; the smaller spring force is
at the paper reference edge of the fuser.

      The design incorporates four key features.  Refer to the
figure.
   1.   The hot roll 1 is saddle-shaped with the minimum diameter 2
located closest to the paper reference edge 3 of the paper path.  The
minimum diameter should be located 60 to 100 mm from the reference
edge for best performance on envelopes and narrow papers.
   2.   The spring force applied to each end of the back-up roll 4 is
unbalanced in the preferred embodiment. The unbalanced force
significantly reduces wrinkling, creasing, and folding of envelopes.
The smaller force is applied at the paper reference edge of the
fuser.
   3.   The hot roll has a parabolic shape which is concave along its
entire length.  This is necessary to keep the print media in constant
tension as it enters the fuser. A "V" shape is not as effective in
eliminating wrinkling and creasing of paper and envelopes.
   4.   The two ends of the hot roll have approximately equal
diameters 5, 6.  Diameters can be adjusted to minimize skew on a
p...