Patent US3817677A successfully refreshed from Google Patents.
US3817677A
Expired / Lapsed
US
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Metal neck forming plug having polytetrafluoroethylene shoulder
Assignee: Phillips Petroleum Co
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Filing: 1972-07-31
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Granted: 1974-06-18
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Expires: 1992-07-31
Abstract
Abstract In an apparatus for stretching a parison preform at orientation temperature and thereafter expanding same out into conformity with a neck forming means, a plug is provided for moving axially into said parison said plug having a first metal section of reduced diameter and a second metal section adjacent to said first having a larger diameter, said first and second sections being connected by a sloping shoulder section made of polytetrafluoroethylene.
Inventors
- 👤 C Seefluth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:58
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/76; B29C49/761; B29C49/02; B29C49/04; B29C49/58
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
12 words
Apparatus according to claim 1 wherein said first section is generally cylindrical.
Claim 2
Dependent Claim
22 words
Apparatus according to claim 1 wherein said second section has a surface finish within the range of 1-125 microinches root mean square.
Claim 3
Dependent Claim
22 words
Apparatus according to claim 1 wherein said second section has a surface finish within the range of 10-75 microinches root mean square.
Claim 4
Dependent Claim
13 words
Apparatus according to claim 1 wherein said second section has internal cooling means.
Claim 5
Dependent Claim
16 words
Apparatus according to claim 1 wherein said polytetrafluoroethylene shoulder portion is formed by machining or casting.
Claim 6
Dependent Claim
21 words
Apparatus according to claim 1 wherein said second section has a diameter of 1.1-2 times the diameter of said first section.
Claim 7
Dependent Claim
21 words
Apparatus according to claim 1 wherein said second section has a diameter of 1.1-1.4 times the diameter of said first section.
Claim 8
Dependent Claim
30 words
Apparatus according to claim 8 wherein said first section is generally cylindrical, and said second section has a surface finish of 10-75 microinches root mean square and is internally cooled.
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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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |