Drum printing machines having drive means with freewheel and crank-connecting rod system

摘要

A printing machine is disclosed comprising a drum with a plurality of article holding mandrels. A feeding mechanism selectively feeds and positions article to be printed on the mandrels. An ejection mechanism automatically removes the printed articles from the mandrels. A drive effects stepwise annular displacement of the drum. A first actuating means effects reciprocating operation of the feeding mechanism and another actuating means effects reciprocating operation of the ejecting mechanism. Both the actuating mechanisms are controlled in synchronism with the drive and are independent and distinct from each other. The drive comprises a freewheel having an inner race fixed for rotation with the drum and a crank-connecting rod system attaching the outer race of the freewheel to a rotatably mounting driving shaft. Preferably the speed ratio of the actuating means of the feeding mechanism to that of the ejection mechanism is 2 to 1. The crank-connecting rod system comprises rods and cranks which are of adjustable length.