EP0175510A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Vacuum bagging
Assignee: Aerovac Keighley Ltd
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Filing: 1985-08-30
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Granted: —
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Expires: 2005-08-30
Abstract
Abstract An apparatus for forming a vacuum bag comprises a stretchable membrane 12 held within a framework 10 and carrying affixed to the membrane 12 a resilient seal 14. The seal 14 comprises a pair of tubular members 20, 22 defining between them a cavity 24 within which a vacuum can be drawn when the framework and membrane are placed on a mould base 16. Vacuuming is drawn in the cavity 24 by means of passages 27 communicating with the framework manifold 10 which in turn is provided with vacuum valves 28.
Inventors
- 👤 Howard Thomas Gibson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 11:18
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/32; B29C43/36; B29C43/3642; B29C33/00; B29C33/0038; B29C43/3607; B29C43/02; B29C43/10; B29C43/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
65 words
An apparatus for forming a vacuum bag which comprises a stretchable membrane (12) held within a framework (10) and carrying affixed to the membrane a resilient seal (14) defining a cavity (24) within which a vacuum can be drawn when the framework and membrane are placed on a mould base (16) and means (10, 27, 28) for connecting the cavity with a source of vacuum.
Claim 2
Independent Claim
65 words
An apparatus for forming a vacuum bag which comprises a stretchable membrane (12) held within a framework (10) and carrying affixed to the membrane a resilient seal (14) defining a cavity (24) within which a vacuum can be drawn when the framework and membrane are placed on a mould base (16) and means (10, 27, 28) for connecting the cavity with a source of vacuum.
Claim 3
Dependent Claim
33 words
An apparatus as claimed in claim 1 in which the seal (14) comprises a pair of tubular members (20, 22) formed of a resilient plastics material between them defining a vacuum cavity (24).
Claim 4
Independent Claim
40 words
An apparatus as claimed in either of claims 1 or 2 in which the framework is hollow and forms a vacuum manifold (10) suppling vacuum to the seal (14) via one or more passages (27) communicating with the cavity (24).
Claim 5
Dependent Claim
18 words
An apparatus as claimed in claim 3 in which the framework (10) is a vacuum tight aluminium box-section.
Claim 6
Independent Claim
32 words
An apparatus as claimed in any one of claims 1 to 4 in which the membrane (12) is formed from an elastomeric slicone rubber sheet having high elongation and tear strength properties.
Claim 7
Independent Claim
23 words
An apparatus as claimed in any one of claims 1 to 5 in which the seal is formed from an elastomeric silicone rubber.
Claim 8
Independent Claim
31 words
An apparatus as claimed in any one of claims 2 to 6 in which the tubular members (20, 22) contain one or more air bleeds to prevent pressure build-up during autoclaving.
Claim 9
Independent Claim
42 words
An apparatus as claimed in any one of claims 1 to 7 in which a vacuum can be drawn between the membrane (12) and the mould base (16) independently of the vacuum which can be drawn in the vacuum seal cavity (24).
References Cited (Backward Citations)
No citation records indexed.
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