Membrane press, work base, and fluid-actuated elevating assembly

Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Chamber enclosing work during bonding and/or assembly

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Details

156475, 1565833, 100211, 100299, 269 20, 269 21, 269 58, B29C 5100, B30B 502

Patent

active

058207244

ABSTRACT:
A membrane press is provided for applying a laminating foil to a three-dimensional workpiece to be laminated. The membrane press includes a work base having a supporting surface for carrying the workpiece, and a frame located above the workpiece for holding the foil. The improvement in the membrane press includes a pedestal housing located in the work base and having a cylinder therein communicating through a pedestal opening with the supporting surface of the work base. A piston rod including a workpiece elevating and lowering pedestal is positioned in the cylinder in axial alignment therewith. The pedestal communicates with the supporting surface through the pedestal opening. Upper and lower pistons are affixed to the piston rod in fluid-pressure transmitting relation within the cylinder in axially spaced-part relation to each other. The pistons define respective upper and lower axially aligned pressure-transmitting surfaces. Fluid pressure selectively communicates with the cylinder and the pressure-transmitting surfaces of the pistons for moving the pistons and the pedestal between a workpiece-elevating position wherein one end of the pedestal extends through the pedestal opening to elevate the workpiece above the supporting surface of the work base, and a workpiece-loading position wherein the pedestal is retracted to a position below the workpiece supporting surface of the work base.

REFERENCES:
patent: 4314814 (1982-02-01), Derode
patent: 4447282 (1984-05-01), Valerio et al.
patent: 5225027 (1993-07-01), Diekwisch
patent: 5346193 (1994-09-01), Kitagawa
patent: 5397214 (1995-03-01), Cheung
patent: 5522478 (1996-06-01), Diekwisch
patent: 5580415 (1996-12-01), Diekwisch
Prof. Rolf Hesch, "Membrane Press Systems A Critical Comparison with View to Heating Systems, Heat Distribution, Pressing Time and Costs," all pages.
Heinrich Wemhoner, "The Development of Membrane Press Technology," all pages.
FDM's Woodworking Technology 2000, "Unbeatable Doors at Any Price," Oct. 1993, all pages.

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