US4468187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing a tubular article having an annular groove therein
Assignee: Rexam AB
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Filing: 1982-09-07
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Granted: 1984-08-28
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Expires: 2002-09-07
Abstract
Abstract A tubular article having a peripheral groove is formed by providing the groove in the wall of a tubular blank made of thermoplastic material such as polyethylene terephthalate by applying simultaneously a pressure against the wall of the blank and axial stretching forces. In the bottom of the groove the material is drawn to yielding and the blank is simultaneously elongated.
Inventors
- 👤 Claes T. Nilsson
- 👤 Kjell M. Jakobsen
- 👤 Lars G. Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:46
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/02; B65D1/0207; B29; B29C; B29C31/00; B29C31/002; B29C49/00; B29C49/071; B29C49/08; B29C49/10; B29C49/14; B29C49/42; B29C49/48; B29C49/54; B29C49/541; B29C55/00; B29C55/22; B29C55/30; B29C59/00; B29C59/02; B29C59/04; B29C59/043; B29C67/00; B29C67/0003; B29C67/0014; B65D1/0223; B29C43/00; B29C43/32; B29C43/36; B29C43/361; B29C2043/3615; B29C2043/3631; B29C2793/00; B29C2793/009; B29C2949/00; B29C2949/07; B29C2949/072; B29C2949/0723; B29C2949/073; B29C2949/0732; B29C2949/076; B29C2949/0768; B29C2949/077; B29C2949/0772; B29C2949/0776; B29C2949/078; B29C2949/079; B29C2949/08; B29C2949/0861; B29C2949/0862; B29K; B29K2067/00; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/258; B29K2995/00; B29K2995/0037; B29K2995/004; Y; Y10; Y10S; Y10S425/00; Y10S425/218; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139; Y10T428/1397
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
A device for producing a tubular article with a peripheral groove from a tubular blank having a wall of essentially amorphous material, comprising fixing means for fixedly engaging the wall of the blank on both sides of a region in which the groove is to be formed and for axial movement in opposite directions while maintaining secure engagement with the wall of the blank to produce axial stretching forces in the blank, and mechanical shaping means for contacting and compressing the wall of the blank in the region in which the groove is to be formed while undergoing movement peripherally around the blank and also perpendicular to the axis of the blank such that said groove is formed in the wall of the blank with gradually increasing depth and the axial stretching forces applied by said fixing means to the material in the bottom of the groove causes the material to yield while its thickness is simultaneously reduced.
Claim 2
Independent Claim
158 words
A device for producing a tubular article with a peripheral groove from a tubular blank having a wall of essentially amorphous material, comprising fixing means for fixedly engaging the wall of the blank on both sides of a region in which the groove is to be formed and for axial movement in opposite directions while maintaining secure engagement with the wall of the blank to produce axial stretching forces in the blank, and mechanical shaping means for contacting and compressing the wall of the blank in the region in which the groove is to be formed while undergoing movement peripherally around the blank and also perpendicular to the axis of the blank such that said groove is formed in the wall of the blank with gradually increasing depth and the axial stretching forces applied by said fixing means to the material in the bottom of the groove causes the material to yield while its thickness is simultaneously reduced.
Claim 3
Dependent Claim
27 words
A device as claimed in claim 1 wherein said mechanical shaping means comprises at least one roller having an axial parallel to the axis of the blank.
Claim 4
Dependent Claim
39 words
A device as claimed in claim 1 wherein said mechanical shaping means comprises an elongated shaping device having a shaping edge against which the blank rolls while the distance to the axis of the blank axis is gradually reduced.
Claim 5
Dependent Claim
36 words
A device as claimed in claim 1 comprising an internal mandrel insertable into said blank to form a supporting surface for said wall upon application of said shaping means and fixing means to form said groove.
Claim 6
Dependent Claim
28 words
A device as claimed in claim 4 wherein said mandrel includes a central part and two outer parts each movable relative to the central part of the mandrel.
Claim 7
Dependent Claim
67 words
A device as claimed in claim 5 wherein said outer parts of the mandrel are shaped relative to the inside of the tubular blank to permit the mandrel to be placed inside the blank such that the central and outer parts of the mandrel provide supporting surfaces for the wall of the blank when the shaping means and the fixing means convert the blank to the article.
References Cited (Backward Citations)
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Cited
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US3728059A
Cited
US3998919A
Cited
US3939243A
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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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |