US4225370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contracted fibrous overwrap method for thermoplastic coated article
Assignee: Internorth Inc
•
Filing: 1979-01-08
•
Granted: 1980-09-30
•
Expires: 1999-01-08
Abstract
Abstract A method is disclosed of coating articles of manufacture to prevent corrosion which comprises applying a thermoplastic coating material to the article, applying a layer of fibrous material over the coating material, wetting the layer of fibrous material, and heating the three components, whereby contraction of the fibrous material, during heating, will compress the coating material and counteract its deformation tendencies such that it is well bonded to the article. The thermoplastic coating material is preferably applied in the form of a coating tape comprising the thermoplastic coating material and a thermoplastic adhesive and is used to provide a protective coating for underground pipe.
Inventors
- 👤 Leland C. Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:06
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/18; B; B29; B29C; B29C61/00; B29C61/006; B29C63/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1009
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
117 words
A method of coating an article of manufacture, comprising the steps of: (a) applying a thermoplastic coating material to the article to form a distinct layer thereon; (b) applying a layer of fibrous material over the coating material, said fibrous material being a fibrous product with relatively high wet strength which condenses while drying; (c) wetting the layer of fibrous material with a wetting agent selected from the group consisting of water and aqueous solution; and (d) heating the article, coating material, and wet fibrous material, whereby contraction of the fibrous material, during heating, will compress the coating material and counteract the deformation tendencies of the coating material such that it is well bonded to said article.
Claim 2
Independent Claim
117 words
A method of coating an article of manufacture, comprising the steps of: (a) applying a thermoplastic coating material to the article to form a distinct layer thereon; (b) applying a layer of fibrous material over the coating material, said fibrous material being a fibrous product with relatively high wet strength which condenses while drying; (c) wetting the layer of fibrous material with a wetting agent selected from the group consisting of water and aqueous solution; and (d) heating the article, coating material, and wet fibrous material, whereby contraction of the fibrous material, during heating, will compress the coating material and counteract the deformation tendencies of the coating material such that it is well bonded to said article.
Claim 3
Dependent Claim
30 words
The method of claim 1 and further characterized in that step (a) comprises wrapping the article with a coating tape comprised of a thermoplastic coating material and a thermoplastic adhesive.
Claim 4
Dependent Claim
30 words
The method of claim 2 and further characterized in that the thermoplastic coating material is a polyolefin and the thermoplastic adhesive is a copolymer of an olefin and acrylic acid.
Claim 5
Dependent Claim
25 words
The method of claim 1 and further characterized in that step (b) comprises overwrapping the thermoplastic coating material with a layer of the fibrous material.
Claim 6
Dependent Claim
18 words
The method of claim 4 and further characterized in that the fibrous material is a natural cellulose fiber.
Claim 7
Independent Claim
116 words
The method of coating a pipe or other conduit, comprising the steps of: (a) applying a thermoplastic coating material to the pipe to form a distinct layer thereon; (b) applying a fibrous material over the coating material, said fibrous material being a fibrous product with relatively high wet strength which condenses while drying; (c) wetting the layer of fibrous material with a wetting agent selected from the group consisting of water and aqueous solutions; and (d) heating the pipe, coating material, and wet fibrous material, whereby contraction of the fibrous material, during heating, will compress the coating material and counteract the deformation tendencies of the coating material such that it is well bonded to said pipe.
Claim 8
Independent Claim
116 words
The method of coating a pipe or other conduit, comprising the steps of: (a) applying a thermoplastic coating material to the pipe to form a distinct layer thereon; (b) applying a fibrous material over the coating material, said fibrous material being a fibrous product with relatively high wet strength which condenses while drying; (c) wetting the layer of fibrous material with a wetting agent selected from the group consisting of water and aqueous solutions; and (d) heating the pipe, coating material, and wet fibrous material, whereby contraction of the fibrous material, during heating, will compress the coating material and counteract the deformation tendencies of the coating material such that it is well bonded to said pipe.
Claim 9
Dependent Claim
30 words
The method of claim 6 and further characterized in that step (a) comprises wrapping the pipe with a coating tape comprised of a thermoplastic coating material and a thermoplastic adhesive.
Claim 10
Dependent Claim
31 words
The method of claim 7 and further characterized in that the thermoplastic coating material is a polyolefin and the thermoplastic adhesive is a copolymer of an olefin and an acrylic acid.
Claim 11
Dependent Claim
25 words
The method of claim 6 and further characterized in that step (b) comprises overwrapping the thermoplastic coating material with a layer of the fibrous material.
Claim 12
Dependent Claim
18 words
The method of claim 9 and further characterized in that the fibrous material is a natural cellulose fiber.
Claim 13
Independent Claim
130 words
The method of coating a pipe or other conduit, comprising the steps of: (a) wrapping the pipe with a coating tape comprised of a thermoplastic coating material and a thermoplastic adhesive; (b) overwrapping the coating tape with a layer of fibrous material which is a fibrous product with relatively high wet strength which condenses while drying; (c) wetting the layer of fibrous material with a wetting agent selected from the group consisting of water and aqueous solutions; and (d) heating the pipe, the coating tape, and the wet fibrous material, whereby the contraction of the fibrous material, during heating will compress the thermoplastic coating material and adhesive and counteract the deformation tendencies of the thermoplastic coating material and adhesive such that the coating tape is well bonded to said pipe.
Claim 14
Independent Claim
130 words
The method of coating a pipe or other conduit, comprising the steps of: (a) wrapping the pipe with a coating tape comprised of a thermoplastic coating material and a thermoplastic adhesive; (b) overwrapping the coating tape with a layer of fibrous material which is a fibrous product with relatively high wet strength which condenses while drying; (c) wetting the layer of fibrous material with a wetting agent selected from the group consisting of water and aqueous solutions; and (d) heating the pipe, the coating tape, and the wet fibrous material, whereby the contraction of the fibrous material, during heating will compress the thermoplastic coating material and adhesive and counteract the deformation tendencies of the thermoplastic coating material and adhesive such that the coating tape is well bonded to said pipe.
Claim 15
Dependent Claim
39 words
The method of claim 11 and further characterized in that the thermoplastic coating material is a polyolefin, the thermoplastic adhesive is a copolymer of an olefin and an acrylic acid, and the fibrous material is a natural cellulose fiber.
Claim 16
Independent Claim
122 words
The method of coating a pipe or other conduit, comprising the steps of: (a) wrapping the pipe with a coating tape comprised of a thermoplastic coating material, a thermoplastic adhesive, and an outer layer of a fibrous material which is a fibrous product with relatively high wet strength which condenses while drying; (b) wetting the layer of fibrous material with a wetting agent selected from the group consisting of water and aqueous solutions; and (c) heating the pipe and the coating tape, whereby the contraction of the fibrous material, during heating, will compress the thermoplastic coating material and adhesive and counteract the deformation tendencies of the thermoplastic coating material and adhesive such that the coating tape is well bonded to said pipe.
Claim 17
Independent Claim
122 words
The method of coating a pipe or other conduit, comprising the steps of: (a) wrapping the pipe with a coating tape comprised of a thermoplastic coating material, a thermoplastic adhesive, and an outer layer of a fibrous material which is a fibrous product with relatively high wet strength which condenses while drying; (b) wetting the layer of fibrous material with a wetting agent selected from the group consisting of water and aqueous solutions; and (c) heating the pipe and the coating tape, whereby the contraction of the fibrous material, during heating, will compress the thermoplastic coating material and adhesive and counteract the deformation tendencies of the thermoplastic coating material and adhesive such that the coating tape is well bonded to said pipe.
Claim 18
Dependent Claim
39 words
The method of claim 13 and further characterized in that the thermoplastic coating material is a polyolefin, the thermoplastic adhesive is a copolymer of an olefin and an acrylic acid, and the fibrous material is a natural cellulose fiber.
References Cited (Backward Citations)
US3072517A
Cited
US3276929A
Cited
US3190780A
Cited
US3245856A
Cited
US3525656A
Cited
US3736305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |