US3695805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming plug for blow molding oriented articles
Assignee: Phillips Petroleum Co
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Filing: 1970-02-17
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Granted: 1972-10-03
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Expires: 1990-02-17
Abstract
Abstract A first end portion of a tubular parison free form which has been heated to orientation temperature is expanded out into conformity with neck or thread forming jaws by inserting into one end of said parison a first end portion of a plug, closing the jaws over the first end portions of the parison and the plug, and thereafter forcing the first end portion and other portions of the plug into the parison.
Inventors
- 👤 Dixie E Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:12
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/76
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
298 words
An apparatus for forming a first portion of a blow-molded, oriented parison, comprising: a plug having a first end portion and being movable between a first position at which the first end portion is inserted within the first end portion of the parison and a second position at which the first and a larger second portion of the plug are positioned within the first end portion of the parison, said first and second portions of the plug having a cylindrical configuration with the first portion of the plug having an outside dimension related to a preselected outside dimension of the second portion of the plug by the equation where: A OD of that area encompassed by jaw pair at the second position (inches) B annular cross-sectional area of preselected parison to be formed and the difference between the outside diameter of the second portion of the plug and the inside diameter of the jaws at the second position is about twice as large as a preselected wall thickness of the first portion of the parison in the formed condition; a pair of jaws movable from a first position at which each jaw is spaced from a first end portion of the parison at the first position of the plug and a second position at which the jaws are forcefully urging the first end portion of the parison against the first end portion of the plug about the circumference of said plug portion in the first position of said plug for initially forming the therebetween portion of the parison and against the second end portion of the plug in the second position of said plug; means for moving the jaws between the first and the second positions; and means for moving the plug between the first and second positions.
Claim 2
Independent Claim
298 words
An apparatus for forming a first portion of a blow-molded, oriented parison, comprising: a plug having a first end portion and being movable between a first position at which the first end portion is inserted within the first end portion of the parison and a second position at which the first and a larger second portion of the plug are positioned within the first end portion of the parison, said first and second portions of the plug having a cylindrical configuration with the first portion of the plug having an outside dimension related to a preselected outside dimension of the second portion of the plug by the equation where: A OD of that area encompassed by jaw pair at the second position (inches) B annular cross-sectional area of preselected parison to be formed and the difference between the outside diameter of the second portion of the plug and the inside diameter of the jaws at the second position is about twice as large as a preselected wall thickness of the first portion of the parison in the formed condition; a pair of jaws movable from a first position at which each jaw is spaced from a first end portion of the parison at the first position of the plug and a second position at which the jaws are forcefully urging the first end portion of the parison against the first end portion of the plug about the circumference of said plug portion in the first position of said plug for initially forming the therebetween portion of the parison and against the second end portion of the plug in the second position of said plug; means for moving the jaws between the first and the second positions; and means for moving the plug between the first and second positions.
Claim 3
Dependent Claim
60 words
An apparatus, as set forth in claim 1, wherein at least the outer surface of the plug is 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.
Claim 4
Dependent Claim
21 words
An apparatus, as set forth in claim 1, wherein the first aNd second portions of the plug have a cylindrical configuration.
Claim 5
Dependent Claim
23 words
An apparatus, as set forth in claim 1, wherein the first and second portions of the plug each have a relatively small taper.
Claim 6
Dependent Claim
18 words
An apparatus, as set forth in claim 1, wherein the means for moving the jaws are hydraulic cylinders.
Claim 7
Independent Claim
351 words
An apparatus for forming a first portion of a blow-molded oriented parison comprising: a plug having a first end portion and being movable between a first position at which the first end portion is inserted within the first end portion of the parison and a second position at which the first and a larger second portion of the plug are positioned within the first end portion of the parison, said first and second portions of the plug having a cylindrical configuration with the first portion of the plug having an outside dimension related to a preselected outside dimension of the second portion of the plug by the equation where: A OD of that area encompassed by jaw pair at the second position (inches) B annular cross-sectional area of preselected parison to be formed and the difference between the outside diameter of the second portion of the plug and the inside diameter of the jaws at the second position is about twice as large as a preselected wall thickness of the first portion of the parison in the formed condition; and with at least the outer 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; a pair of jaws movable from a first position at which each jaw is spaced from a first end portion of the parison at the first position of the plug and a second position at which the jaws are forcefully urging the first end portion of the parison against the first end portion of the plug about the circumference of said plug portion in the first position of said plug for initially forming the therebetween portion of the parison and against the second end portion of the plug in the second position of said plug; means for moving the jaws between the first and the second positions; and means for moving the plug between the first and second positions.
Claim 8
Independent Claim
351 words
An apparatus for forming a first portion of a blow-molded oriented parison comprising: a plug having a first end portion and being movable between a first position at which the first end portion is inserted within the first end portion of the parison and a second position at which the first and a larger second portion of the plug are positioned within the first end portion of the parison, said first and second portions of the plug having a cylindrical configuration with the first portion of the plug having an outside dimension related to a preselected outside dimension of the second portion of the plug by the equation where: A OD of that area encompassed by jaw pair at the second position (inches) B annular cross-sectional area of preselected parison to be formed and the difference between the outside diameter of the second portion of the plug and the inside diameter of the jaws at the second position is about twice as large as a preselected wall thickness of the first portion of the parison in the formed condition; and with at least the outer 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; a pair of jaws movable from a first position at which each jaw is spaced from a first end portion of the parison at the first position of the plug and a second position at which the jaws are forcefully urging the first end portion of the parison against the first end portion of the plug about the circumference of said plug portion in the first position of said plug for initially forming the therebetween portion of the parison and against the second end portion of the plug in the second position of said plug; means for moving the jaws between the first and the second positions; and means for moving the plug between the first and second positions.
References Cited (Backward Citations)
US3311950A
Cited
US3507005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |