US3649150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stellite neck forming plug for blow molding oriented articles
Assignee: Phillips Petroleum Co
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Filing: 1969-11-26
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Granted: 1972-03-14
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Expires: 1989-11-26
Abstract
Abstract Jaw means for grasping an open end of a tubular parison and a Stellite neck forming plug movable axially so as to enter the parison and force the parison out into conformity with a molding zone of the jaw means. Means are provided for moving the plug and for forming and blow molding the parison. The plug has a first section of reduced diameter and a second adjacent section of larger diameter.
Inventors
- 👤 Dixie E Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:32
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/76
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
148 words
Apparatus comprising in combination: jaw means adapted to grasp an open end of a tubular parison; a plug Having a first section of reduced diameter and a second section adjacent to said first section having a larger diameter, said second section having a surface finish within the range of 1 to 125 microinches, root mean square, over which is superimposed generally annular serrations having a depth of 1-4 mils, at least the surface of said plug being made of an alloy comprising 40-80 percent cobalt, 20-35 percent chromium, 0.75-2.5 percent carbon, 0-25 percent tungsten, 0-5 percent nickel, 0-5 percent iron, 0-3 percent manganese, 0-3 percent silicon, and 0-2 percent molybdenum, said plug being coaxially disposed relative to said jaw means; and means to move said plug axially so as to enter said tubular parison and force same out into conformity with a molding zone of said jaw means.
Claim 2
Dependent Claim
148 words
Apparatus comprising in combination: jaw means adapted to grasp an open end of a tubular parison; a plug Having a first section of reduced diameter and a second section adjacent to said first section having a larger diameter, said second section having a surface finish within the range of 1 to 125 microinches, root mean square, over which is superimposed generally annular serrations having a depth of 1-4 mils, at least the surface of said plug being made of an alloy comprising 40-80 percent cobalt, 20-35 percent chromium, 0.75-2.5 percent carbon, 0-25 percent tungsten, 0-5 percent nickel, 0-5 percent iron, 0-3 percent manganese, 0-3 percent silicon, and 0-2 percent molybdenum, said plug being coaxially disposed relative to said jaw means; and means to move said plug axially so as to enter said tubular parison and force same out into conformity with a molding zone of said jaw means.
Claim 3
Dependent Claim
19 words
Apparatus according to claim 1 wherein said first and second sections are connected by a gradually sloping shoulder section.
Claim 4
Dependent Claim
21 words
Apparatus according to claim 2 wherein said serrations are in the form of threads having a lead of 2- 15 mils.
Claim 5
Dependent Claim
18 words
Apparatus according to claim 3 wherein said finish is within the range of 3-10 microinches, root mean square.
Claim 6
Dependent Claim
63 words
Apparatus according to claim 1 comprising in addition: means to extrude a continuous length of tubing; means to cool said tubing; means to cut said tubing into said work pieces; means to reheat said parisons; means to stretch said parisons longitudinally; mold means; and means to introduce fluid pressure into said parison so as to expand same into conformity with said mold means.
Claim 7
Dependent Claim
13 words
Apparatus according to claim 1 comprising in addition: means to cool said plug.
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |