Sheet feeding or delivering – Feeding – Separators
Patent
1983-02-14
1984-11-13
Schacher, Richard A.
Sheet feeding or delivering
Feeding
Separators
271153, 271258, B65H 322
Patent
active
044821433
ABSTRACT:
A device for sensing the removal of workpieces from a stack by a pickup head which, during its intended function, is lowered to engage the upper workpiece in a stack, then elevated to remove the workpiece and then rotated so the workpiece can be deposited in a preselected location. The sensing device is pivotably mounted on the pickup head and movable between positions below the underside of the pickup head when the latter fails to engage a workpiece and at a level even with the underside of the pickup head which is accomplished through its engagement with a workpiece held by the pickup head. Upon engagement and pick up of a workpiece, a signal is given to raise the pickup head and then rotate it so the workpiece can be deposited in a predetermined location. Upon failure to engage and remove a workpiece from a stack, a signal is given for the pickup head to make a plurality of repeated attempts to engage and remove a workpiece from the stack. After a predetermined number of failures of the pickup head to perform its intended function, a warning signal is activated for the purpose of drawing attention thereto.
REFERENCES:
patent: 3966197 (1976-06-01), Riedl
patent: 4165811 (1979-08-01), Mainvielle
Rockwell-Rimoldi S.p.A.
Schacher Richard A,.
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