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This method provides a means for judging how well toner is fused to copy paper.
English (United States)
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Fuse Grading Technique
This method provides a means for judging how well toner is fused to copy
A copy is first made of a test master document. This copy is then subjected
to analysis by an image analyzer, i.e., a microscopic type device which is
automatically able to count very small toned picture elements which make up a
given area on the copy. This device is set to indicate the presence or absence of
toner in a given picture area by comparing this area's "gray" state to a reference.
The same copy is then subjected to an accurate and reproducible abrasion of
the fused image with an abrasive tool under consistent, controlled conditions of
speed and pressure.
This same area of the copy is again subjected to analysis by the image
analyzer. As a result of the abrasion step above-described, less picture areas
will now meet the analyzer's "gray" reference. A comparison of this second count
of picture elements, which meet the "gray" reference, with the first such count,
provides a measure of a copier's fusing process. That is, the closer these two
counts are to each other. the better the copier's fuser is operating.