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US 4,007,706 AGranted
Apparatus for treating work pieces
OwnerKarl Ewald Arvidssoninventor
Life of this patent
Estimating the term…
Abstract
An apparatus for treating work pieces in a closed space having a collapsible material. The treatment utilizes a period of subpressure and a period of pressure, in which cavities in the pieces are more or less filled with liquid. Prior to this the cavities are wholly or partially filled with a surface-tension reducing gas and/or solution.
Claims13
Apparatus for treating workpieces in an enclosed space, said apparatus comprising:
- a. workpiece-supporting means having a workpiece-supporting surface;
- b. a rigid framework in proximity to and coextensive with edge portions of said workpiece-supporting surface, said framework having a side facing said workpiece-supporting surface;
- c. a collapsible material secured to said framework defining an enclosed space over the workpiece-supporting surface;
- d. a plurality of spaced posts secured to said framework;
- and
- e. wall members secured to and supported by said spaced posts extending continuously about said framework, said wall members together with said collapsible material defining between them a liquid-tight chamber.
3 more elements
Apparatus for treating workpieces in an enclosed space, said apparatus comprising:
- a. workpiece-supporting means having a workpiece-supporting surface;
- b. a rigid framework in proximity to and coextensive with edge portions of said workpiece-supporting surface;
- c. collapsible material secured to said framework defining an enclosed space over said workpiece-supporting surface;
- d. sealing means between said framework and said workpiece-supporting surface for sealing said enclosed space;
- e. a plurality of spaced posts secured to said framework;
- f. wall members secured to and supported by said spaced posts extending continuously about said framework, said wall members together with said collapsible material defining between them a liquid-tight chamber surrounding said enclosed space;
- g. suction means mounted on said collapsible material within the enclosed space;
- h. external ejector means connected to said suction means for providing a subatmospheric pressure within said enclosed space;
- i. pressurizing means and means connecting said pressurizing means to the enclosed space for providing a super-atmospheric pressure within said enclosed space;
- j. liquid reservoir means;
- k. liquid transfer means communicating with said liquid reservoir means and with said liquid-tight chamber and said enclosed space;
- l. valve means connected to said liquid transfer means for selectively directing liquid from said reservoir means to said liquid-tight chamber or to said enclosed space;
- and
- m. means for returning liquid from said liquid-tight chamber and enclosed space to said reservoir means.
11 more elements
Dependencies are inferred from the claim text.