Photocopying – Contact printing – Light boxes
Patent
1991-09-06
1992-08-11
Muses, R. L.
Photocopying
Contact printing
Light boxes
355309, 355271, G03G 2100
Patent
active
051383977
ABSTRACT:
A method and apparatus for assuring proper park positioning of a sheet gripper device. A reference signal is generated by a master control board causing the sheet gripper to commence its movement along the belts of a sheet transport system. An index marker and encoder coupled to a servo motor generate pulses based on the rotation of the shaft of the servo motor. A registration control board coupled to the servo motor generates an index interrupt after receipt of a predetermined number of pulses from the index marker. The number of rising and falling edges of a system clock that occur between the generation of the reference signal and the index interrupt is computed by the registration control board and sent to the master control board. The master control board compares this distance value to a predetermined resynchronization value. Based on the discrepancy between the two values, the master control board recalculates a park position value which is sent to the registration control board. The park position value is the amount of time that elapses after the sheet gripper has passed a gripper home sensor. Thus, recalculation of the park position value insures accurate park positioning prior to the performance of each job.
REFERENCES:
patent: 4386771 (1983-06-01), Lakdawala
patent: 4552448 (1985-11-01), Davidson
patent: 4849795 (1989-07-01), Spehrley et al.
patent: 4872037 (1989-10-01), Kasahara et al.
patent: 4875069 (1989-10-01), Takada et al.
patent: 4905052 (1990-02-01), Cassano et al.
patent: 5014123 (1991-05-01), Imoto
patent: 5041866 (1991-08-01), Imoto
patent: 5045892 (1991-09-01), Morisawa et al.
patent: 5075734 (1991-12-01), Durland et al.
U.S. patent application Ser. No. 07/630,629, "Sheet Transport System with Improved Registration", filed Dec. 20, 1990, Vittorio Castelli et al.
Dastin Richard M.
Gates Janine M.
Kusmierz Rachel C.
Mihalyov Kenneth J.
Muses R. L.
Xerox Corporation
LandOfFree
Park position control apparatus for a sheet transport system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Park position control apparatus for a sheet transport system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Park position control apparatus for a sheet transport system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-350124