Patent US4083910A successfully refreshed from Google Patents.
US4083910A
Expired / Lapsed
US
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Process for molding plastic articles
Assignee: Solvay SA
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Filing: 1975-05-16
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Granted: 1978-04-11
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Expires: 1995-05-16
Abstract
Abstract A mold composed of two half-molds arranged to undergo pivotal movement into a mold closing position, for molding an article having a reentrant portion extending to both sides of the plane of closure of the half-molds, is also arranged so that during pivotal movement out of the mold closing position one of the half-molds undergoes translational movement parallel to the plane of closure in order to release the reentrant portion of the article from the mold cavity.
Inventors
- 👤 Hubert Tits
- 👤 Jean-Marie Losson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:53
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/20; B29C49/00; B29C49/42; B29C49/48; B29C49/54; B29C49/56; B29C49/5601; B29C49/5602; B29C33/26; B29C33/44
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
123 words
In a process for molding plastic articles possessing a reentrant part wherein a mold is formed by bringing two half-molds together, a molding operation is carried out in the mold, and the mold is opened to release the molded article, the reentrant part of the article extending across the closure plane of the mold, the improvement wherein the opening of the mold at the completion of the molding operation is carried out by causing the entirety of one of the half-molds to undergo a pivoting movement away from the other half-mold accompanied by a translational movement along a direction parallel to the closure plane of the mold, permitting release of the reentrant part of the article before the mold has been completely opened.
Claim 2
Dependent Claim
123 words
In a process for molding plastic articles possessing a reentrant part wherein a mold is formed by bringing two half-molds together, a molding operation is carried out in the mold, and the mold is opened to release the molded article, the reentrant part of the article extending across the closure plane of the mold, the improvement wherein the opening of the mold at the completion of the molding operation is carried out by causing the entirety of one of the half-molds to undergo a pivoting movement away from the other half-mold accompanied by a translational movement along a direction parallel to the closure plane of the mold, permitting release of the reentrant part of the article before the mold has been completely opened.
Claim 3
Dependent Claim
22 words
Process according to claim 1 wherein the translational movement component is effected along a direction parallel to the axis of the mold.
Claim 4
Dependent Claim
20 words
Process according to claim 1 wherein the translational movement component is brought about after the mold has been partially opened.
Claim 5
Dependent Claim
17 words
Process according to claim 1 in which the plastic articles are produced by the technique of blow-molding.
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) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |