Device for unstacking relatively flat objects such as letters or

Details Device for unstacking relatively flat objects such as letters or Device for unstacking relatively flat objects such as letters or

1988-05-26

1989-09-19

Shaver, Kevin P.

Sheet feeding or delivering

Special articles

Envelope

271 6, 271 12, 271 13, 271 311, 271225, 271149, 271150, 271241, B65H 500

Patent

active

048674303

ABSTRACT:
A device for unstacking relatively flat objects such as letters or postal packets of various different lengths, widths, and thicknesses. The device includes: a conveyor for conveying stacks of objects as well as an object separating and grasping mechanism for separating and grasping the objects one-by-one, and a transport conveyor for transporting the objects one after another. The object separating and grasping mechanism has retainer and guide for retaining and guiding a stack of objects, for example a wall against which one of the edges of each object is pressed and object-grasping suction cup for engaging the first object of the stack as well as a displacement mechanism for displacing the cups initially in a first direction substantially perpendicular to the direction of stack advance and substantially parallel to the plane of the retainer and guide means, and then in a second direction which is substantially perpendicular to the movement of the first direction, in order to convey the object towards the transport conveyor.

REFERENCES:
patent: 3146902 (1964-09-01), Voelker
patent: 3866764 (1975-02-01), Leiser
patent: 3885784 (1975-05-01), Sautton
patent: 4346876 (1982-08-01), Guenther et al.
patent: 4701094 (1987-10-01), Courjaret et al.
patent: 4759537 (1988-07-01), Illig et al.

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