US4011354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making tubular resin elements such as pipes
Assignee: Individual
•
Filing: 1972-03-22
•
Granted: 1977-03-08
•
Expires: 1992-03-22
Abstract
Abstract There is disclosed a method and apparatus for making tubular fiber reinforced thermosetting resin elements having a thermoplastic lining. The technique involves application of a thermoplastic lining layer to an axially moving mandrel surface, application of at least one layer of fiber reinforced thermosetting resin material superimposed upon the lining layer, providing for bonding of thermosetting and thermoplastic layers to each other, and heating the thermosetting resin to effect solidification during axial advancement of the superimposed layers with the moving mandrel surface. Provision is also made for applying a thermoplastic jacket layer superimposed upon the thermosetting layer.
Inventors
- 👤 Frede Hilmar Drostholm
- 👤 Leonard S. Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:21
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/74; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/109
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
112 words
In the manufacture of tubular fiber reinforced resin elements, the method which comprises applying a tube lining to an axially moving mandrel surface to be advanced axially of the mandrel by said moving surface, applying at least one layer of liquid fiber reinforced thermosetting resin material superimposed upon the tube lining to be advanced axially with the lining, the lining layer being applied by depositing solid particulate thermoplastic resin material on the mandrel surface, heating the particulate resin material to soften and fuse it in situ on the mandrel surface, and heating the thermosetting resin material to effect solidification thereof during axial advancement of the superimposed layers with the moving mandrel surface.
Claim 2
Dependent Claim
112 words
In the manufacture of tubular fiber reinforced resin elements, the method which comprises applying a tube lining to an axially moving mandrel surface to be advanced axially of the mandrel by said moving surface, applying at least one layer of liquid fiber reinforced thermosetting resin material superimposed upon the tube lining to be advanced axially with the lining, the lining layer being applied by depositing solid particulate thermoplastic resin material on the mandrel surface, heating the particulate resin material to soften and fuse it in situ on the mandrel surface, and heating the thermosetting resin material to effect solidification thereof during axial advancement of the superimposed layers with the moving mandrel surface.
Claim 3
Dependent Claim
26 words
A method as defined in claim 1 and further including cooling the fused thermoplastic resin material on the mandrel before application of the thermosetting resin material.
Claim 4
Dependent Claim
126 words
In the manufacture of tubular fiber reinforced resin elements, the method which comprises applying a thermoplastic resin tube lining layer to an axially moving mandrel surface to be advanced axially of the mandrel by said moving surface, the lining layer being applied by delivering to the mandrel surface particulate thermoplastic resin material and heating and fusing the particles to form the layer in situ on the mandrel surface, applying at least one layer of liquid fiber reinforced thermosetting resin material superimposed upon the tube lining to be advanced axially with the lining, bonding adjacent superimposed thermosetting and thermoplastic resin layers to each other, and heating the thermosetting resin material to effect solidification thereof during axial advancement of the superimposed resin layers with the moving mandrel surface.
Claim 5
Dependent Claim
126 words
In the manufacture of tubular fiber reinforced resin elements, the method which comprises applying a thermoplastic resin tube lining layer to an axially moving mandrel surface to be advanced axially of the mandrel by said moving surface, the lining layer being applied by delivering to the mandrel surface particulate thermoplastic resin material and heating and fusing the particles to form the layer in situ on the mandrel surface, applying at least one layer of liquid fiber reinforced thermosetting resin material superimposed upon the tube lining to be advanced axially with the lining, bonding adjacent superimposed thermosetting and thermoplastic resin layers to each other, and heating the thermosetting resin material to effect solidification thereof during axial advancement of the superimposed resin layers with the moving mandrel surface.
Claim 6
Dependent Claim
40 words
A method as defined in claim 3 in which the fusion of the particulate material on the mandrel surface is effected by preheating the mandrel surface to the fusion temperature of the thermoplastic resin material before applying the resin material.
Claim 7
Dependent Claim
35 words
A method as defined in claim 3 in which the fusion of the particulate material on the mandrel surface is effected by heating the particulate material while it is being advanced by the mandrel surface.
Claim 8
Dependent Claim
47 words
A method as defined in claim 3 in which the bonding of the adjacent superimposed layers to each other is effected by applying aggregate particles to the heated and fused thermoplastic lining layer, and cooling the fused aggregate bearing layer before the liquid thermosetting resin is applied.
Claim 9
Dependent Claim
146 words
In the manufacture of tubular fiber reinforced resin elements, the method which comprises applying a tube lining to an axially moving mandrel surface to be advanced axially of the mandrel by said moving surface, applying at least one layer of fiber reinforced thermosetting resin material superimposed upon the tube lining to be advanced axially with the lining, the lining layer being applied by depositing solid particulate thermoplastic resin material on the mandrel surface, heating the particulate resin material to soften and fuse it in situ on the mandrel surface, applying and partially embedding solid bonding means in the softened resin layer before the liquid thermosetting resin material is applied and thereby provide for partially embedding the bonding means also in the thermosetting resin material, and curing the thermosetting resin material to effect solidification thereof during axial advancement of the superimposed layers with the moving mandrel surface.
Claim 10
Dependent Claim
146 words
In the manufacture of tubular fiber reinforced resin elements, the method which comprises applying a tube lining to an axially moving mandrel surface to be advanced axially of the mandrel by said moving surface, applying at least one layer of fiber reinforced thermosetting resin material superimposed upon the tube lining to be advanced axially with the lining, the lining layer being applied by depositing solid particulate thermoplastic resin material on the mandrel surface, heating the particulate resin material to soften and fuse it in situ on the mandrel surface, applying and partially embedding solid bonding means in the softened resin layer before the liquid thermosetting resin material is applied and thereby provide for partially embedding the bonding means also in the thermosetting resin material, and curing the thermosetting resin material to effect solidification thereof during axial advancement of the superimposed layers with the moving mandrel surface.
Claim 11
Dependent Claim
15 words
A method as defined in claim 7 in which the bonding means comprises aggregate particles.
Claim 12
Dependent Claim
16 words
A method as defined in claim 7 in which the bonding means comprises a fibrous material.
Claim 13
Dependent Claim
15 words
A method as defined in claim 7 in which the bonding means comprises fibrous roving.
Claim 14
Dependent Claim
29 words
A method as defined in claim 7 and further including cooling the thermoplastic layer to solidify it after applying the bonding means but before applying the liquid thermosetting resin.
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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) | 1980-03-07 | 1980-09-06 | 1981-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-07 | 1984-09-06 | 1985-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-07 | 1988-09-06 | 1989-03-08 | $7700.00 | Window Closed / Lapsed |