Device to pick up sheets from a stack and transport the...

Details Device to pick up sheets from a stack and transport the... Device to pick up sheets from a stack and transport the...

B - Operations, Transporting

65

H

270/168

B65H 3/08 (2006.01) B65H 3/12 (2006.01) B65H 5/22 (2006.01)

Patent

CA 1237452

ABSTRACT A guide block (11) has a groove (16) with a flat floor cut into it, in which an endless belt (15) contain- ing perforations (17) travels. A suction opening (18) opens into the floor of the groove (16), to which a vacuum is periodically applied by means of a valve (12). The endless belt (15) travels over a stack (1) of sheets (2) by means of guide rollers (4,5) and a drive roller (3). The vacuum, when periodically applied by the valve (12), operates through the perforations (17) so that the top- most sheet (2) of the stack (1) is sucked against the endless belt (15) and carried away in the same direction (28). One preferred form of the endless belt (15) is a toothed belt, with spaces between the teeth (21) that form vacuum chambers (22). With this compact and there- fore easily positionable device, sheets (2) are sucked up from a stack (1) and transported away while maintain- ing their orientation, meaning that very high production rates are attained.

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