Sheet feeding or delivering – Feeding – Multiple supplies
Patent
1976-10-26
1978-04-11
Schacher, Richard A.
Sheet feeding or delivering
Feeding
Multiple supplies
271149, B65H 344, B65H 102
Patent
active
040835545
ABSTRACT:
A power unit, comprising a telescopically joined plunger assembly and barrel assembly, is internally configured to define a pair of separate fluid chambers, each of which is alternately communicated to a common source of fluid energy. The plunger and barrel assemblies are coaxially mounted on a common support shaft along which the power unit travels in incremental steps. The external end of each of the plunger and barrel assemblies is internally fitted with a set of unidirectionally acting locking rings, each set being normally biased against an associated locking wedge and into canted positions frictionally locked onto the supporting shaft. Alternate pressurization and venting of the pair of fluid chambers alternately unlocks one set of rings and effects a limited increment of inboard movement of either the plunger assembly or barrel assembly, the other assembly remaining locked to the support shaft. The pair of wedges are keyed to the support shaft to normally support a feed paddle in driving contact with one end of a supply of articles held in a feed magazine. By means of a handle on the feed paddle, the plunger and barrel assemblies can be turned on the pair of locking wedges to mechanically unlock the two sets of rings to deactivate the device to permit its withdrawal along the shaft in the outboard direction.
REFERENCES:
patent: 1213626 (1917-01-01), Greene
patent: 1366549 (1921-01-01), Winkley
patent: 3285606 (1966-11-01), Johnson
Mueller Frederick E.
Schacher Richard A,.
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