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US 4,308,792 AGranted
Drum printing machines having drive means with freewheel and crank-connecting rod system
AssigneeMachines Dubuit Societe Anonyme
InventorJean-Louis Dubuit
Life of this patent
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AssigneeMachines Dubuit Societe Anonyme
InventorJean-Louis Dubuit
Estimating the term…
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.
In printing machine of the type comprising a drum carried by a rotatable shaft at a printing station and provided with a plurality of article holding mandrels, a feeding mechanism for selectively feeding and positioning articles to be printed on said mandrels, an ejection mechanism for automatically removing printed articles from said mandrels, drive means for effecting stepwise angular displacement of said drum, actuating means for effecting reciprocating operation of said feeding mechanism, and actuating means for effecting reciprocating operation of said ejection mechanism, both of said actuating means being controlled in synchronism with said drive means, the improvement comprising said drive means including a freewheel having an inner race fixed for rotation with said drum and an outer race, a crank-connecting rod system attaching said outer race to a rotatably mounted driving shaft, and means for positively determining the angular position of the drum comprising an indexing member fixed to the drum and brake means coacting with means fixed relative to said drum.
In printing machine of the type comprising a drum carried by a rotatable shaft at a printing station and provided with a plurality of article holding mandrels, a feeding mechanism for selectively feeding and positioning articles to be printed on said mandrels, an ejection mechanism for automatically removing printed articles from said mandrels, drive means for effecting stepwise angular displacement of said drum, actuating means for effecting reciprocating operation of said feeding mechanism, and actuating means for effecting reciprocating operation of said ejection mechanism both said actuating means being controlled in synchronism with said drive means, the improvement comprising said drive means including a freewheel having an inner race fixed for rotation with said drum and an outer race, a crank-connecting rod system attaching said outer race to a rotatably mounted driving shaft, said actuating means for said feeding mechanism being independent and distinct from said actuating means for said ejection mechanism, said feeding mechanism comprising a push rod connected to a first link attached to one of the arms of a bellcrank lever fulcrumed at the intersection of its arms, and the other arm of said bellcrank lever being attached to a second link reciprocated by a cam, characterized by an adjustable position connection between one of said links and the associated arm of said bellcrank lever whereby the stroke of said push rod is adjustable by adjustment of the position connection.
In printing machine of the type comprising a drum carried by a rotatable shaft at a printing station and provided with a plurality of article holding mandrels, a feeding mechanism for selectively feeding and positioning articles to be printed on said mandrels, an ejection mechanism for automatically removing printed articles from said mandrels, drive means for effecting stepwise angular displacement of said drum, actuating means for effecting reciprocating operation of said feeding mechanism, and actuating means for effecting reciprocating operation of said ejection mechanism, both said actuating means being controlled in synchronism with said drive means, the improvement comprising said drive means including a freewheel having an inner race fixed for rotation with said drum and an outer race, and a crank-connecting rod system attaching said outer race to a rotatably mounting driving shaft, said feed mechanism comprising a push rod connected to a first link attached to one of the arms of a bellcrank lever fulcrumed at the intersection of its arms, and the other arm of said bellcrank lever being attached to a second link reciprocated by a cam, characterized by an adjustable position connection between one of said links and the associated arm of said bellcrank lever whereby the stroke of said push rod is adjustable by adjustment of the position connection.
Dependencies are inferred from the claim text.