The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 1985
Filed:
Oct. 12, 1984
William T Kline, Seattle, WA (US);
Robert F Mittelstadt, Auburn, WA (US);
The Boeing Company, Seattle, WA (US);
Abstract
In vacuum bagging and similar operations involving composite materials, it is necessary to provide both a release layer that directly contacts the composite material and will not adhere to such material, and passages for removing entrapped air. A problem with known release layers is that they are not sufficiently stretchable to provide uniform contact with complex or sharply bending surface configurations. The invention provides a breather/release material (6). Material (6) includes a flexible, stretchable foraminous fabric (10) that has a ribbed major surface (16). A foraminous coating (20) of silicone rubber release compound is formed on fabric (10) by a shrink drying process. Coating (20) conforms to the ribbed configuration of surface (16) and has holes (24) generally coinciding with holes (12) in fabric (10). Ribbed surface (16) may be bonded to an impervious layer (4) with an adhesive (8). Passageways (26) formed by ribs (14) of surface (16) and holes (12, 24) are kept open by limiting the amount of adhesive ( 8) used.