Method and apparatus for separating a predetermined number of sh

Details Method and apparatus for separating a predetermined number of sh Method and apparatus for separating a predetermined number of sh

1998-03-02

1999-11-16

Krizek, Janice L.

Material or article handling

Apparatus for moving intersupporting articles into, within,...

Unstacking apparatus

271 97, 4147955, 414801, B65H 348

Patent

active

059846224

ABSTRACT:
A method of and apparatus for separation from a stack of sheets a block of a predetermined number of sheets, the method including moving the stack in a forward direction, directing an air stream across one corner of the forward portion of the stack to spread the corners apart, sensing and counting the number of spread sheet corners that pass a predetermined location, and separating the group of sheets from the remainder of the stack when the sensed and counted sheets reach a predetermined number. Further directing a thin plane of air toward the corner and center of the sheets at said location to cause a greater space between the sheets in the group and the next sheet in the stack. Also, vacuum nozzles are provided to remove unwanted air from above and below the stack and group. With the group so formed, separation includes imparting lateral force on the group edges.

REFERENCES:
patent: 3635463 (1972-01-01), Stobb
patent: 4204667 (1980-05-01), Klenk
patent: 4222556 (1980-09-01), Chapman et al.
patent: 4306684 (1981-12-01), Peterson
patent: 4635921 (1987-01-01), Thomas
patent: 4986731 (1991-01-01), Shinomiya
patent: 5092578 (1992-03-01), Bergmeier et al.
patent: 5096370 (1992-03-01), Mohr
patent: 5110110 (1992-05-01), Wirz et al.

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