Plastic article or earthenware shaping or treating: apparatus – Preform reshaping or resizing means: or vulcanizing means... – By fluid pressure actuated flexible diaphragm
Reexamination Certificate
2005-02-08
2005-02-08
Davis, Robert B. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Preform reshaping or resizing means: or vulcanizing means...
By fluid pressure actuated flexible diaphragm
C156S285000, C156S382000
Reexamination Certificate
active
06851945
ABSTRACT:
A reusable vacuum bag is configured for application of at least one sealant bead for providing vacuum tight sealing of the reusable vacuum bag to a forming tool during fabrication of a composite part. The reusable vacuum bag comprises at least one elastomeric layer and a fluoroelastomeric strip. The elastomeric layer is sealable to the forming tool and has a sealing flange extending peripherally thereabout. The fluoroelastomeric strip extends substantially along the sealing flange and has first and second surfaces. The elastomeric layer and the fluoroelastomeric strip each have polymers and a peroxide curative. The peroxide curative initiates vulcanization wherein the polymers of each material cross-link at an elevated temperature to form double-oxygen bonds such that a permanent bond is formed between the sealing flange and the fluoroelastomeric strip at the first surface. The fluoroelastomeric strip is releaseably adhered at the second surface to the sealant bead.
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Mead William
Potter John
Davis Robert B.
Northrop Grumman Corporation
Stetina Brunda Garred & Brucker
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