Sheet feeding or delivering – Feeding and delivering – Separator and conveyor
Patent
1985-10-03
1987-01-20
Reger, Duane A.
Sheet feeding or delivering
Feeding and delivering
Separator and conveyor
271 9, 271 12, 271197, 271276, B65H 312, B65H 344, B65H 522
Patent
active
046375996
ABSTRACT:
The invention is concerned with a suction-lifting conveyor for the transfer of sheet-shaped objects, in particular of sheets of plywood veneer (4), one by one from a stack to further processing or to another stack. The device comprises a box-shaped suction-channel equipment (1) extending substantially over the entire length and width of the conveyor, blower means (2) for maintaining a negative pressure in the suction-channel system, endless belts (3) performing the transfer of the sheets and running substantially horizontally above the stacks of sheets, the said belts being arranged so that during their transfer movement they run against the outside of the bottom face of the suction-channel system, being subject to the effect of the negative pressure in the suction-channel system, and that during their return movement they run in the suction-channel system. According to the invention, at the transfer side of the conveyor belts (3), in immediate proximity of the running zone of the belts, above each stack of sheets, at least one suction box (5) is provided whose bottom face can be lowered onto the stack of sheets and, correspondingly, whose bottom face can be raised at least to the level of the transfer side of the conveyor belt (3), the said suction box being connected to the suction-channel equipment (1) so as to produce a suction effect at the bottom face of the suction box.
REFERENCES:
patent: 2753795 (1956-07-01), Bruns
patent: 3409149 (1968-11-01), Graux
patent: 3463483 (1969-08-01), Keller et al.
patent: 4382593 (1983-05-01), Beran et al.
Barlow James E.
Raute Oy
Reger Duane A.
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