Patent US4178200A successfully refreshed from Google Patents.
US4178200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure roll for jacketing steel pipes with thermoplastic strip
Assignee: Vodafone GmbH
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Filing: 1978-03-09
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Granted: 1979-12-11
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Expires: 1998-03-09
Abstract
Abstract A roll or roller for urging extruded thermoplastic strip onto an axially advancing, rotating pipe is constructed from a silicon rubber core with a shore hardness of 40 and having a softer silicon rubber jacket with a shore hardness not exceeding 30. The core is traversed by axial bores.
Inventors
- 👤 Karl-Heinz Hakert
- 👤 Walter Quitmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:25
CPC Classifications
B; B29; B29C; B29C63/00; B29C63/0004; B29C63/02; B29C63/04; B29C63/08; B29C63/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
52 words
Pressure roller for forcing a thermoplastic ribbon, strip or the like onto the surface of a rotating and axially moving steel pipe, comprising: a shaft; a cylindrical core on the shaft, made of sillicone rubber: and a jacket on the core, made also of silicone rubber but being softer than the core.
Claim 2
Dependent Claim
52 words
Pressure roller for forcing a thermoplastic ribbon, strip or the like onto the surface of a rotating and axially moving steel pipe, comprising: a shaft; a cylindrical core on the shaft, made of sillicone rubber: and a jacket on the core, made also of silicone rubber but being softer than the core.
Claim 3
Dependent Claim
23 words
Roller as in claim 1, said core having a shore hardness of about 40, the jacket having a shore hardness not exceeding 30.
Claim 4
Dependent Claim
25 words
Roller as in claim 1, said core having a plurality of axially extending bores, traversing the core axially entirely and being arranged around the shaft.
Claim 5
Dependent Claim
40 words
In a method for helically winding thermoplastic strip onto an axially advancing rotating steel pipe, the step of urging the strip onto the pipe by means of a roller having a silicone rubber core and a softer silicone rubber jacket.
Claim 6
Dependent Claim
40 words
In a method for helically winding thermoplastic strip onto an axially advancing rotating steel pipe, the step of urging the strip onto the pipe by means of a roller having a silicone rubber core and a softer silicone rubber jacket.
Claim 7
Dependent Claim
16 words
The method as in claim 4, using a roller whose core is traversed by axial bores.
Claim 8
Dependent Claim
60 words
In an apparatus for helically winding thermoplastic strip onto an axially advancing rotating steel pipe, a pressure roller for forcing the strip onto the surface of the pipe the roller comprising: a shaft; a cylindrical core on the shaft, made of silicone rubber; and a jacket on the core, made also of silicone rubber but being softer than the core.
Claim 9
Dependent Claim
60 words
In an apparatus for helically winding thermoplastic strip onto an axially advancing rotating steel pipe, a pressure roller for forcing the strip onto the surface of the pipe the roller comprising: a shaft; a cylindrical core on the shaft, made of silicone rubber; and a jacket on the core, made also of silicone rubber but being softer than the core.
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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) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |