Method and apparatus for preventing misregistration between plate and blanket cylinders of a sheet type printing press
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United States of America Patent
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Aug 27, 1991
Grant Date -
N/A
app pub date -
Sep 28, 1989
filing date -
Sep 28, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sheet type printing press is disclosed which includes a transmission assembly that prevents misregistration of plate and blanket cylinders upon their separation. The assembly also permits the press to be advanced or retarded while running to either correct misregistration or to start a new job using the same plate cylinders. A double harmonic drive is used to advance or retard the press. The harmonic drive is mounted to a hub which causes one of the circular splines and flexsplines thereof to be maintained under constant load. Such loading prevents misregistration when the plate cylinder drive gear is disengaged.
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