US3272896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming plastic articles
Assignee: Monsanto Co
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Filing: 1963-11-13
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Granted: 1966-09-13
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Expires: 1983-11-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Raymond E Winchester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:27
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/76; B29C49/761
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
A METHOD OF FORMING AN ARTICLE FROM PLASTIC MATERIAL, SAID METHOD COMPRISING: POSITIONING A GENERALLY TUBULAR LENGTH OF PLASTIC MATERIAL WITHIN A CLOSED, SECTIONAL MOLD, WITH ONE END OF SAID LENGTH BEING OPEN AND ENGAGING AN END OF MANDREL MEANS, SAID END OF SAID LENGTH BEING UNRESTRAINED AGAINST RADIALLY OUTWARD MOVEMENT AND SPACED FROM INTERIOR WALL PORTIONS OF SAID CLOSED THEREAFTER INTRODUCING PRESSURIZED FLUID INTO THE INTERIOR OF SAID LENGTH OF PLASTIC MATERIAL SO AS TO CAUSE RADIAL EXPANSION THEREOF WHILE SAID END OF SAID LENGTH REMAINS IN ENGAGEMENT WITH SAID END OF SAID MANDREL MEANS AND THE EXTREMITY OF SAID END OF SAID LENGTH REMAINS SPACED FROM SAID INTERIOR WALL POSITIONS OF SAID CLOSED MOLD SECTIONS AND MOVING SAID MANDREL MEANS TOWARD SAID END OF SAID LENGTH OF PLASTIC MATERIAL SO AS TO CAUSE SAID END OF SAID LENGTH TO FOLD OVER INWARDLY TOWARD THE INTERIOR OF SAID LENGTH AND LIE ADJACENT AN INNER, TUBULAR WALL PORTION OF SAID LENGTH.
Claim 2
Independent Claim
161 words
A METHOD OF FORMING AN ARTICLE FROM PLASTIC MATERIAL, SAID METHOD COMPRISING: POSITIONING A GENERALLY TUBULAR LENGTH OF PLASTIC MATERIAL WITHIN A CLOSED, SECTIONAL MOLD, WITH ONE END OF SAID LENGTH BEING OPEN AND ENGAGING AN END OF MANDREL MEANS, SAID END OF SAID LENGTH BEING UNRESTRAINED AGAINST RADIALLY OUTWARD MOVEMENT AND SPACED FROM INTERIOR WALL PORTIONS OF SAID CLOSED THEREAFTER INTRODUCING PRESSURIZED FLUID INTO THE INTERIOR OF SAID LENGTH OF PLASTIC MATERIAL SO AS TO CAUSE RADIAL EXPANSION THEREOF WHILE SAID END OF SAID LENGTH REMAINS IN ENGAGEMENT WITH SAID END OF SAID MANDREL MEANS AND THE EXTREMITY OF SAID END OF SAID LENGTH REMAINS SPACED FROM SAID INTERIOR WALL POSITIONS OF SAID CLOSED MOLD SECTIONS AND MOVING SAID MANDREL MEANS TOWARD SAID END OF SAID LENGTH OF PLASTIC MATERIAL SO AS TO CAUSE SAID END OF SAID LENGTH TO FOLD OVER INWARDLY TOWARD THE INTERIOR OF SAID LENGTH AND LIE ADJACENT AN INNER, TUBULAR WALL PORTION OF SAID LENGTH.
Claim 3
Independent Claim
129 words
AN APPARATUS FOR FORMING AN ARTICLE FROM PLASTIC MATERIAL, SAID APPARATUS COMPRISING: MEANS FOR POSITIONING A GENERALLY TUBULAR LENGTH OF A PLASTIC MATERIAL WITHIN A CLOSED, SECTIONAL MOLD, WITH ONE END OF SAID LENGTH BEING OPEN AND ENGAGING AN END PORTION OF MANDREL MEANS, SAID MANDREL MEANS HAVING A GRADUALLY OUTWARDLY EXPANDING SHOULDER, SAID END OF SAID LENGTH BEING UNRESTRAINED AGAINST RADIALLY OUTWARD MOVEMENT; SAID CLOSED MOLD SECTIONS INCLUDING INTERIOR WALL PORTIONS RADIALLY SPACED FROM SAID END OF SAID LENGTH; AND MEANS FOR MOVING SAID MANDREL MEANS TOWARD SAID END OF SAID LENGTH OF PLASTIC MATERIAL SO AS TO CAUSE SAID END OF SAID LENGTH TO FOLD OVER INWARDLY ALONG SAID SHOULDER TOWARD THE INTERIOR OF SAID LENGTH AND LIE ADJACENT AN INNER, TUBULAR WALL PORTION OF SAID LENGTH.
Claim 4
Independent Claim
129 words
AN APPARATUS FOR FORMING AN ARTICLE FROM PLASTIC MATERIAL, SAID APPARATUS COMPRISING: MEANS FOR POSITIONING A GENERALLY TUBULAR LENGTH OF A PLASTIC MATERIAL WITHIN A CLOSED, SECTIONAL MOLD, WITH ONE END OF SAID LENGTH BEING OPEN AND ENGAGING AN END PORTION OF MANDREL MEANS, SAID MANDREL MEANS HAVING A GRADUALLY OUTWARDLY EXPANDING SHOULDER, SAID END OF SAID LENGTH BEING UNRESTRAINED AGAINST RADIALLY OUTWARD MOVEMENT; SAID CLOSED MOLD SECTIONS INCLUDING INTERIOR WALL PORTIONS RADIALLY SPACED FROM SAID END OF SAID LENGTH; AND MEANS FOR MOVING SAID MANDREL MEANS TOWARD SAID END OF SAID LENGTH OF PLASTIC MATERIAL SO AS TO CAUSE SAID END OF SAID LENGTH TO FOLD OVER INWARDLY ALONG SAID SHOULDER TOWARD THE INTERIOR OF SAID LENGTH AND LIE ADJACENT AN INNER, TUBULAR WALL PORTION OF SAID LENGTH.
References Cited (Backward Citations)
US2810934A
Cited
US3009196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |