Multiple sequenced rotational air valves for vacuum transport

Details Multiple sequenced rotational air valves for vacuum transport Multiple sequenced rotational air valves for vacuum transport

2011-07-19

2011-07-19

McCullough, Michael C (Department: 3653)

Sheet feeding or delivering

Feeding

By means to convey sheet

C271S196000, C198S803500

Reexamination Certificate

active

07980558

ABSTRACT:
A vacuum control assembly for use in an image production device is provided. The assembly has a plenum, a perforated plate, a plurality of valve assemblies, and a controller. Each valve assembly has a rotating valve having a vacuum passage, and a chamber body having a plurality of chambers. Each valve is rotatable between a first position that fluidly connects the vacuum passage with at least one of the chambers to complete a fluid path between the plenum and the perforated plate, and a second position at which the vacuum passage connects the plenum with none of the chambers. The controller controls the plurality of valve assemblies to provide vacuum to a first predetermined portion of the perforated plate while also providing no vacuum to a second predetermined portion of the perforated plate.

REFERENCES:
patent: 5921544 (1999-07-01), Benedict
patent: 6543948 (2003-04-01), Beehler et al.

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