Patent US2179442A successfully refreshed from Google Patents.
Patent US4301200A successfully refreshed from Google Patents.
US4301200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic tube formed by spiral winding of a snap locking profile strip
Assignee: Pont a Mousson SA
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Filing: 1980-09-05
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Granted: 1981-11-17
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Expires: 2000-09-05
Abstract
Abstract A profile strip 1 is composed of a rectangular cross-sectional body 2 having on each edge a recessed fastening means 3, 4, one male and the other female. Each fastening means 3-4 comprises an axial support flange 10, 13 which lengthens one of the exterior and interior surfaces 5, 6 of the body 2. The two adjacent flanges are abutting, and the two fastening means when engaged define, with the adjacent sides 7 of the body, a U-sectioned space which is filled by a border insert 16 having a complementary cross-section. The invention enables large diameter tubes of plastic material to be formed without any internal or external projections.
Inventors
- 👤 Michel Langenfeld
- 👤 Andre Lagabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:39
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/16; B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/78; Y; Y10; Y10S; Y10S24/00; Y10S24/30; Y10S24/50; Y10T; Y10T428/00; Y10T428/24; Y10T428/24744
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
A tube of plastic material formed by spirally winding a profile strip comprising a rectangular cross-sectional body (2) having a recessed fastening means on each edge, one male and the other female, wherein each fastening means (3, 4) comprises an axial support flange (10, 13) which lengthens one of the exterior (5) and interior (6) surfaces of the body, said axial support flanges (10, 13) both extending from the same surface of said body, two adjacent flanges abutting one another and two fastening means when engaged defining with adjacent sides (7) of the body a U-sectioned space, and a border insert (16) having a complementary cross-section filling said space and operating to lock said fastening means together.
Claim 2
Dependent Claim
117 words
A tube of plastic material formed by spirally winding a profile strip comprising a rectangular cross-sectional body (2) having a recessed fastening means on each edge, one male and the other female, wherein each fastening means (3, 4) comprises an axial support flange (10, 13) which lengthens one of the exterior (5) and interior (6) surfaces of the body, said axial support flanges (10, 13) both extending from the same surface of said body, two adjacent flanges abutting one another and two fastening means when engaged defining with adjacent sides (7) of the body a U-sectioned space, and a border insert (16) having a complementary cross-section filling said space and operating to lock said fastening means together.
Claim 3
Dependent Claim
16 words
The tube of claim 1, wherein the border insert is also made of a plastic material.
Claim 4
Dependent Claim
46 words
The tube of claim 2, wherein the profile strip and the border insert are made of a thermoplastic material, the fastening means being welded one to the other, and the border insert being welded to said fastening means and to the adjacent sides of the body.
Claim 5
Dependent Claim
23 words
The tube of any one of claims 1 to 3, wherein both said axial flanges lengthen the interior surface (6) of the body.
Claim 6
Dependent Claim
18 words
The tube of any one of claims 1 to 3, wherein the fastening means have mating dovetailed profiles.
Claim 7
Dependent Claim
19 words
The tube of any one of claims 1 to 3, wherein the fastening means have mating three-quarter circular profiles.
References Cited (Backward Citations)
US3495628A
Cited
US3679531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |