Method and apparatus for transport speed optimization to minimiz

Details Method and apparatus for transport speed optimization to minimiz Method and apparatus for transport speed optimization to minimiz

1994-12-05

1996-10-22

Braun, Fred L.

Photocopying

Contact printing

Light boxes

355311, G03G 2100

Patent

active

055682278

ABSTRACT:
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.

REFERENCES:
patent: 4017065 (1977-04-01), Poehlein
patent: 4017067 (1977-04-01), Soures et al.
patent: 4951095 (1990-08-01), Warden
patent: 5160946 (1992-11-01), Hwang
patent: 5166735 (1992-11-01), Malachowski
patent: 5313252 (1994-05-01), Castelli et al.

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