US5132069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of injection molding composite articles
Assignee: Individual
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Filing: 1990-01-09
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Granted: 1992-07-21
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Expires: 2010-01-09
Abstract
Abstract A method of molding complex composite articles having skin portions containing fibres to be injected with a resin and a core portion includes providing one or more galleries in the core or fibre skin and injecting resin into the gallery or galleries whereby it is rapidly transmitted to all portions of the skin. The galleries overcome the resistance to flow created by the capillary nature of the fibrous layer and enable more rapid mold cycles to be employed and more complex articles therefore to be molded.
Inventors
- 👤 John R. Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:14
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/68; B29C70/86; B29C70/865; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/46; B29C70/48; B29C70/54; B29C70/546; B29C70/547; B29K; B29K2105/00; B29K2105/04; B29K2105/046
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
A method of molding complex composite articles for use as structural members, said method comprising the steps of: providing a layer containing fibers to be injected with a resin and a core portion; providing at least one gallery in at least one of the core and fiber layer; injecting resin directly into said at least one gallery by inserting a nozzle through a port into said at least one gallery and injecting resin through said nozzle into said at least one gallery whereby the resin is rapidly transmitted to all portions of the layers; withdrawing the nozzle and plugging the port before the resin cures; and curing said resin.
Claim 2
Independent Claim
109 words
A method of molding complex composite articles for use as structural members, said method comprising the steps of: providing a layer containing fibers to be injected with a resin and a core portion; providing at least one gallery in at least one of the core and fiber layer; injecting resin directly into said at least one gallery by inserting a nozzle through a port into said at least one gallery and injecting resin through said nozzle into said at least one gallery whereby the resin is rapidly transmitted to all portions of the layers; withdrawing the nozzle and plugging the port before the resin cures; and curing said resin.
Claim 3
Dependent Claim
18 words
A method as defined in claim 1 further comprising: said core being a resin impermeable foamed plastics material.
Claim 4
Dependent Claim
19 words
A method as defined in claim 2 further comprising: said at least one gallery being provided in said core.
Claim 5
Dependent Claim
20 words
A method as defined in claim 1 further comprising: said at least one gallery being provided in the fiber layer.
Claim 6
Dependent Claim
31 words
A method as defined in claim 1 further comprising: said at least one gallery being at the surface of the core and being bounded by the fiber layer constituting a skin.
Claim 7
Dependent Claim
25 words
A method as defined in claim 1 further comprising: the fibers in the layer being selected from the group consisting of glass, carbon, and aramid.
Claim 8
Dependent Claim
25 words
A method as defined in claim 1 further comprising: said core being selected from the group consisting a closed cell foamed polyester and polyurethane material.
Claim 9
Dependent Claim
15 words
A method as defined in claim 1 further comprising: said fibers being elongated and continuous.
Claim 10
Dependent Claim
21 words
A method as defined in claim 1 further comprising: said gallery providing at least one line of penetration into the layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-21 | 1996-01-20 | 1996-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-21 | 2000-01-20 | 2000-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-21 | 2004-01-20 | 2004-07-21 | $7700.00 | Window Closed / Lapsed |