Vacuum plenum system for facilitating the high-speed...

Sheet feeding or delivering – Delivering – By pneumatic conveyor

Reexamination Certificate

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Details

C271S276000, C271S003220, C271S196000

Reexamination Certificate

active

07014187

ABSTRACT:
A new and improved article or mail-piece conveyor system has a vacuum plenum system integrally incorporated therein which effectively withdraws ambient air ahead or downstream of the oncoming conveyed articles or mail pieces such that the oncoming conveyed articles or mail pieces will not be subjected to tip vortices and/or other disruptive aerodynamic forces. In this manner, the articles or mail pieces will not be subjected to destabilizing aerodynamic circulation, currents, downflow, downwash, or momentum forces so as not to, in turn, exhibit flutter, fluctuations, or oscillation movements. Accordingly, extremely high speed conveyance of the articles or mail pieces, within the range of, for example, two hundred inches per second (200 ips) can in fact be achieved.

REFERENCES:
patent: 3796424 (1974-03-01), Fox
patent: 4314696 (1982-02-01), Graef
patent: 5192066 (1993-03-01), Steinhilber
patent: 5499809 (1996-03-01), Takemoto et al.
patent: 5564693 (1996-10-01), Elkis et al.
patent: 5676368 (1997-10-01), Wilson et al.
patent: 6494452 (2002-12-01), Karasiewicz
patent: 05286628 (1993-11-01), None

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