Apparatus for stacking and unstacking sheet material, more parti

Details Apparatus for stacking and unstacking sheet material, more parti Apparatus for stacking and unstacking sheet material, more parti

1977-08-09

1978-06-06

Paperner, L. J.

Sheet feeding or delivering

Delivering

Rotary conveyor

214 85D, 271103, 271194, B65G 5728

Patent

active

040930831

ABSTRACT:
The specification describes an apparatus for stacking and unstacking sheet material, more particularly glass sheets, comprising one or more suction plates, capable of moving towards a sheet material stack and adapted to be moved by a pressure cylinder actuator, and with a sensing member, which on making contact with the stack, the surface position of which changes as the stacking or unstacking progresses generates a pulse adapted to control movement of the piston rod of the pressure cylinder actuator. As a sensing member a switch (vacuum monitor, pressure monitor) responsive to changes in pressure is provided in the suction duct system of the suction plates and/or in the pressure duct system of the pressure cylinder actuator.

REFERENCES:
patent: 2049850 (1936-08-01), Lytle et al.
patent: 3326547 (1967-06-01), Walters et al.
patent: 3542241 (1970-11-01), Middleditch
patent: 3679073 (1972-07-01), Malburet
patent: 3679076 (1972-07-01), Miller et al.
patent: 3757966 (1973-09-01), Cox et al.

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