US3817677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal neck forming plug having polytetrafluoroethylene shoulder
Assignee: Phillips Petroleum Co
•
Filing: 1972-07-31
•
Granted: 1974-06-18
•
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 11:50
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.
References Cited (Backward Citations)
US3025562A
Cited
US3360826A
Cited
US3303249A
Cited
US3390426A
Cited
US3412187A
Cited
US3507005A
Cited
US3632713A
Cited
US3649150A
Cited
US3695805A
Cited
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 |