ADJUSTABLE CARRIAGE DRIVE MECHANISM

摘要

A carriage drive mechanism for a screen printing press includes a stroke adjustment mechanism which enables the length of the printing stroke to be altered quickly and conveniently from the exterior of the press without interrupting operation of the press. The preferred drive mechanism includes a pivoting drive lever joined to a crank link by a movable connector. Longitudinal displacement of the connector on the drive lever alters the length of the stroke of the drive lever, which alters the length of the printing stroke. The preferred means for displacing the connector includes a threaded rod which is disposed within the drive lever and which extends through a threaded bore in the connector so that rotation of the threaded rod about its longitudinal axis imparts longitudinal motion to the connector.