Work holders – With fluid means – Vacuum-type holding means
Patent
1991-04-08
1992-08-25
Schwartz, Larry I.
Work holders
With fluid means
Vacuum-type holding means
248363, 83451, B25B 1100
Patent
active
051412128
ABSTRACT:
A vacuum chuck includes a lower base with vacuum plenums, a permanent metal plate with vertically extending holes which communicate with the plenums, a panel of particle board with vertically extending holes disposed in registry with the holes in the metal plate, and a sheet of open cell foam covering the particle board and defining the top surface of the chuck. When a vacuum is drawn in the plenums, it is disbursed beneath the foam sheet via the holes and acts through the foam sheet to clamp the workpiece tightly with respect to the metal plate. During cutting of the workpiece into individual piece parts, a cutting tool cuts through the workpiece and the foam sheet but is prevented by the particle board from cutting into the permanent metal plate.
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Ekstrom Carlson & Co.
Schultz Robert
Schwartz Larry I.
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