Photocopying – Contact printing – Light boxes
Patent
1993-09-17
1995-11-14
Grimley, A. T.
Photocopying
Contact printing
Light boxes
198806, 355207, 474102, G03G 500
Patent
active
054671710
ABSTRACT:
An apparatus for steering a moving web, particularly in an electrophotographic printing machine of the type having an endless photoreceptor belt supported by a plurality of rolls and arranged to move in a predetermined path through a plurality of processing stations disposed therealong the web being of the type which is supported by a plurality of rolls. A web steering roll for supporting the web being adapted for rotational movement about a first axis and tilting movement about a second axis transverse to the first axis is used. A compact internal tilting mechanism utilizing a motor inside of the roll connected at one end to a first pin extending outwardly from one end of said steering roll, the first pin being positioned eccentrically of the rotary axis, and a second pin extending outwardly at the other end of the roll also positioned eccentrically of the rotary axis and connected to the motor through a connecting mechanism so that when said motor is actuated the second pin rotates in a direction opposed to that of the first pin. The pins are supported in substantially parallel guides so that the movement of the roll is limited to one plane. A belt edge sensor can be utilized to track the position of the belt and feed that information to the machine controller which then actuates the steering motor to tilt the roll to the extent and for as long as is necessary to maintain the proper belt tracking pattern on the roll.
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Castelli Vittorio
Chai Stephen T.
Grimley A. T.
Kepner Kevin R.
Lee Shuk Y.
Xerox Corporation
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