Cutting – Processes – With preparatory or simultaneous ancillary treatment of work
Patent
1989-09-18
1991-11-12
Yost, Frank T.
Cutting
Processes
With preparatory or simultaneous ancillary treatment of work
83 22, 83169, 83451, 83939, 269 21, 269 545, B26D 701, D06H 700
Patent
active
050638009
ABSTRACT:
A method and apparatus for supporting sheet material such as cloth during operations thereon such as cutting wherein a pattern is placed on a supporting surface provided with a plurality of pins extending through apertures in the surface, the pins are lowered below the surface for removal of the pattern whereupon sheet material is placed on the surface, typically a plurality of plies being layed up in a stack, and simultaneously the pins are moved through the sheet material to maintain alignment and matching of the plies in the stack. The pattern then is placed on the sheet material in a position determined by the location of the pins, and the material is shaped such as by cutting. A plurality of separate pin holding and supporting devices of narrow width are spaced lengthwise along the apparatus and independently movable lengthwise toward and away from each other. Pins of adjacent rows can be closely spaced together thereby achieving a grid pattern wherein the pins are relatively closely spaced. There is provided apparatus for developing a positive pressure which is employed to apply a flotation force to sheet material on the surface to facilitate movement of the material along the surface, apparatus for developing a negative pressure which is employed to apply a hold down force to sheet material on the surface to facilitate operating on the material, and apparatus for controlling selection of positive or negative pressure so developed.
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Jung Rolf
Pieroni Robert J.
Schwartzott Jack M.
Tobler Arnold
Eastman Machine Company
Peterson Kenneth E.
Yost Frank T.
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