Appeal No. 2000-0154 Page 2
Application No. 08/942,954
images on a web or sheet of paper. When a paper already
printed and fixed on one side is to be printed and fixed on
the other, the paper must be passed over the hot surface of
the preheating saddle for the second fixing. Unfortunately,
the image that is already fixed is heated to such an extent
that it softens and smears on the surface of the saddle. In
contrast, the appellant’s invention senses the temperature of
at least one region of the sliding surface of a preheating
saddle and controls the heating elements in the saddle
according to a desired surface temperature. Such controlling
prevents damage to the image that is already fixed while still
being able to fix the second toner image during the second
pass.
Claim 21, which is representative for present purposes,
follows:
21. An electrographic printer thermal fixing
system, comprising:
a heat transfer fixing station for fixing a
first toner image on a first side of a recording
medium by direct heating thermal contact between the
recording medium and at least one heating roller;
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007