Controlled zone vacuum system

Details Controlled zone vacuum system Controlled zone vacuum system

1993-09-21

1995-05-09

Gordon, Paul P.

Boots, shoes, and leggings

36447409, 269 21, 83451, G05B 1101, B26D 704

Patent

active

054146178

ABSTRACT:
A scheme for controlling the vacuum holddown in a cutter table of the type having a conveyorized support surface comprised of a plurality of bristle members which create a permeable bed through which a vacuum is communicated employs separate zone regions on the vacuum bed which are controllably energized and de-energized in response to command signals generated by a controller in response to cutter head movement which anticipates the position of the knife prior to its arrival at a given zone in order that material set up in reaction time in the valve system is allotting for.

REFERENCES:
patent: 4528878 (1985-07-01), Gerber
patent: 4587873 (1986-05-01), Gerber
patent: 4723766 (1988-02-01), Beeding
patent: 4730526 (1988-03-01), Pearl et al.
patent: 4768763 (1988-09-01), Gerber
patent: 5285373 (1994-02-01), Watanabe et al.

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