Valve system for the count roll of an interfolding machine

Details Valve system for the count roll of an interfolding machine Valve system for the count roll of an interfolding machine

2007-05-22

2007-05-22

Bollinger, David H. (Department: 3653)

Sheet feeding or delivering

Feeding

By means to convey sheet

C271S196000

Reexamination Certificate

active

10957006

ABSTRACT:
An interfolding machine includes an assembly for and method of separating overlapped sheets of material at a desired sheet count. The assembly includes a vacuum assembly with a manifold having a plurality of vacuum inlet ports coupled to a valve body having a plurality of chambers. A spool is contained within the valve body and includes a plurality of ports to provide a plurality of respective vacuum paths to a rotating count roll. The spool also includes a plurality of inlet openings in its outer surface. Each opening in the spool communicates a respective set of count roll vacuum ports with a respective interior chamber of the valve body. A control valve selectively releases the vacuum pressure in the vacuum chambers to atmosphere. The selective application of vacuum pressure to the holes in the count roll creates a fold that separates the sheets to form separate stacks of sheets at the discharge of the interfolding machine.

REFERENCES:
patent: 4838982 (1989-06-01), Klaeser et al.
patent: 5480137 (1996-01-01), Haupenthal
patent: 6688594 (2004-02-01), Dunninger et al.
patent: 2003/0020232 (2003-01-01), Kobayashi et al.
patent: 2003/0047866 (2003-03-01), Dunninger et al.
patent: 1 026 114 (2000-08-01), None
patent: 1 371 593 (2003-12-01), None

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