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US4123494A Expired / Lapsed US ⏱️ 0.0 years remaining

Method and apparatus for reinforcing a hot shaped shell

Assignee: Altulor
•
Filing: 1977-07-06
•
Granted: 1978-10-31
•
Expires: 1997-07-06
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Abstract

Abstract The present invention relates to a method and apparatus for reinforcing an object or article essentially comprising a hot-shaped shell, and more particularly to reinforcing a hot-shaped thermoplastic resin sheet with a resin/glass fibre laminate. According to the invention there is provided a method for reinforcing an article or object which essentially comprises a hot-shaped shell, comprising supporting a surface of the shell on an elastically deformable pad intimately matable therewith, placing a mould part having a working surface of shape complementary to the other surface of the shell so that a free space is formed between the mould part and the shell, injecting a reinforcing resin into the free space and then demoulding the thus-reinforced shell. According to the invention there is also provided an apparatus for carrying out the method, comprising an elastically deformable pad adapted to support (and intimately matable with) a surface of a hot-shaped shell, a mould part complementary to the shape of the other surface of the shell, and means for injecting resin under pressure into the free space formed between the mould part and the shell when in assembled position.

Inventors

  • 👤 Paul Evrard
  • 👤 Michel-Claude Terroy

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 03:18
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/14; B29C45/14065; B29C45/14778; B29C45/17; B29C45/26; B29C45/37; B29C45/40; B29C45/44; B29C45/4478

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 106 words
A method for reinforcing a fragile, hot-shaped, hollow shell in a mold, comprising: placing said fragile shell against an elastically deformable female member shaped to uniformly mate with said shell and uniformly support said shell against molding stresses; pressing a male mold member within said shell against peripheral portions of said shell thereby forming a mold cavity between said mold member and areas of said shell to be covered with a resin material; securing said male mold member to a rigid female support member; injecting a molding resin material into said mold cavity and hardening said material; and removing said resin coated shell from said mold.
Claim 2
Independent Claim 106 words
A method for reinforcing a fragile, hot-shaped, hollow shell in a mold, comprising: placing said fragile shell against an elastically deformable female member shaped to uniformly mate with said shell and uniformly support said shell against molding stresses; pressing a male mold member within said shell against peripheral portions of said shell thereby forming a mold cavity between said mold member and areas of said shell to be covered with a resin material; securing said male mold member to a rigid female support member; injecting a molding resin material into said mold cavity and hardening said material; and removing said resin coated shell from said mold.
Claim 3
Dependent Claim 23 words
The method of claim 1, wherein said elastically deformable female member is placed in a rigid female support member complementary to its shape.
Claim 4
Dependent Claim 27 words
The method of claim 1, which further comprises: placing an elastically deformable member whose working surface defines part of said mold cavity over said male mold member.
Claim 5
Dependent Claim 23 words
The method of claim 1, which further comprises: depositing fiber mats in a mutually overlying relationship on said shell within said mold cavity.
Claim 6
Dependent Claim 44 words
The method of claim 1, wherein the mold cavity between the rigid female support member and said shell is not fluid-tight, the injection of the resin being continued until the resin flows out of the mold at the interface of the rigid female support
Claim 7
Dependent Claim 25 words
The method of claim 1, which further comprises: depositing a layer of fibers in a mutually overlying relationship on said shell within said mold cavity.
Claim 8
Dependent Claim 29 words
The method of claim 6, wherein the molding resin is injected into the mold cavity at a rate which prevents the formation of bubbles or voids in the fibers.
Claim 9
Dependent Claim 35 words
The method of claim 1, wherein, when said shell has a necked portion, said elastically deformable male member is collapsed to allow insertion of said deformable male member into said shell through said necked portion.
Claim 10
Dependent Claim 36 words
The method of claim 8, wherein said deformable male member is removed from said mold by collapsing said deformable male member so that upon removal from the mold, the deformable male member clears said necked portion.

References Cited (Backward Citations)

US2714226A Cited
US3294887A Cited
US3218377A Cited
US3309450A Cited
US3158906A Cited
US3520961A Cited
US3618179A Cited
US3654062A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-10-30 1982-05-01 1982-10-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-10-30 1986-05-01 1986-10-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-10-30 1990-05-01 1990-10-31 $7700.00 Window Closed / Lapsed

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