Method and apparatus for transport speed optimization to minimize image smear

A method and apparatus for minimizing image smear. A plurality of sheets are printed, each having the same test pattern thereon but varying a sheet transport speed as each sheet is printed. The sheets are then scanned by the machine and a velocity profile for each sheet is created. The velocity prof...

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Bibliographic Details
Main Author WONG; LAM F
Format Patent
LanguageEnglish
Published 22.10.1996
Edition6
Subjects
CINEMATOGRAPHY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:A method and apparatus for minimizing image smear. A plurality of sheets are printed, each having the same test pattern thereon but varying a sheet transport speed as each sheet is printed. The sheets are then scanned by the machine and a velocity profile for each sheet is created. The velocity profile is then used to determine a standard deviation and a mean velocity which are then calculated and stored or can be plotted for each sheet. The point at which the relationship between the standard deviation and the mean results in the lowest value is the optimum speed for the subsystem being calibrated. The test is then performed on a second subsystem and repeated several times so that the optimum speeds for the pre and post transfer drives are quickly and easily determined.
Bibliography:Application Number: US19940349299