US4933135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a blow-moulded container from a thermoplastic polyester, in particular pet
Assignee: KHS GmbH
•
Filing: 1988-11-21
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Granted: 1990-06-12
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Expires: 2008-11-21
Abstract
Abstract To improve the properties of biaxially orientated blow-moulded containers of PET the mouth region of the container serving for fitting a closure member is heat-set, i.e. crystallized at elevated temperature. The heat-setting is effected at the mouth end of a parison or preform and the previously heat-set mouth end is then reshaped to the finished mouth portion. This improves the dimensional stability of the mouth region.
Inventors
- 👤 Claus Horwege
- 👤 Wolfgang Reymann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:24
CPC Classifications
B; B29; B29C; B29C57/00; B29C49/00; B29C49/42; B29C49/64; B29C49/6409; B29C49/76; B29C49/761; B29C71/00; B29C71/0063; B29C71/02; B29C49/6436; B29C49/6445; B29C49/6452; B29K; B29K2067/00; B29K2995/00; B29K2995/0012; B29K2995/0017; B29K2995/0037; B29K2995/0041; Y; Y10; Y10S; Y10S264/00; Y10S264/907; Y10S264/908
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
112 words
Method of making a blow-molded container from a thermoplastic polyester comprising the steps of forming a parison having a mouth section to be provided with a closure attachment configuration to subsequently serve for detachable fitting of a closure member; first heat setting the mouth section by heating the mouth section to the crystallization temperature of the thermoplastic polyester for a period of time sufficient to effect crystallization of the mouth section; after the mouth section is heat set introducing the mouth section of the parison into a mold and forming the closure attachment configuration in the heat set mouth section; and blow molding the parison to make the container with biaxial orientation.
Claim 2
Dependent Claim
112 words
Method of making a blow-molded container from a thermoplastic polyester comprising the steps of forming a parison having a mouth section to be provided with a closure attachment configuration to subsequently serve for detachable fitting of a closure member; first heat setting the mouth section by heating the mouth section to the crystallization temperature of the thermoplastic polyester for a period of time sufficient to effect crystallization of the mouth section; after the mouth section is heat set introducing the mouth section of the parison into a mold and forming the closure attachment configuration in the heat set mouth section; and blow molding the parison to make the container with biaxial orientation.
Claim 3
Dependent Claim
15 words
Method according to claim 1, characterized in that the closure attachment configuration comprises a thread.
Claim 4
Dependent Claim
17 words
Method according to claim 1, characterized in that the mouth section end is cooled in the mould.
Claim 5
Dependent Claim
21 words
Method according to claim 2, characterized in that the mouth section end and closure attachment configuration is cooled in the mould.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |