US3900355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of internally winding reinforcing material and of producing reinforced synthetic pipe
Assignee: Kanadevia Corp
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Filing: 1973-03-14
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Granted: 1975-08-19
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Expires: 1993-03-14
Abstract
Abstract A method for applying a fiber or fabric reinforcing material to an internal cylindrical surface in which the reinforcing material is first wound on a shaft, the shaft is then placed concentrically within a tubular cylinder, and the cylinder is rotated so as to centrifugally rewind the reinforcing material from the shaft onto the internal cylindrical surface of the cylinder. With this method, reinforced pipe is produced by applying a synthetic resin in liquid form to the internal cylindrical surface prior or subsequent to the application of the reinforcing material thereto, and the resin is set and bonded to the reinforcing material while the cylinder is rotated.
Inventors
- 👤 Toshiho Goto
- 👤 Yoshinori Nishino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:55
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; B29C70/30; B29C70/32; B29C70/323; B29C70/326; B29C63/00; B29C63/0017; B29C63/0021; B29C63/26; B29C63/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
117 words
THE METHOD OF APPLYING A REINFORCING MATERIAL TO AN INTERNAL CYLINDRICAL SURFACE WHICH INCLUDES, WINDING THE REINFORCING MATERIAL ON A SHAFT, PLACING THE SHAFT CONCENTRICALLY WITHIN A CYLINDER HAVING SAID INTERNAL CYLINDRICAL SURFACE THEREON AND ROTABLE ON THE AXIS THEREOF, THE SHAFT AND THE CYLINDRICAL SURFACE, AND OF THE CYLINDRICAL SURFACE THEREBY PROVIDING AN ANNULAR SPACE BETWEEN THE SHAFT AND THE CYLINDRICAL SURFACE, AND, REWINDING THE REINFORCING MATERIAL FRON THE SHAFT ONTO THE INTERNAL CYLINDRICAL SURFACE BY ROTATING AT LEAST THE CYLINDER TO PRODUCE A ROTATIONAL SPEED DIFFERENCE BETWEEN THE CYLINDER AND THE SHAFT SUCH AS TO UNWIND THE REINFORCING MATERIAL FROM THE SHAFT, THE REINFORCING MATERIAL REVERSING DIRECTION WITHIN SAID ANNULAR SPACE DURING THE REWINDING STEP.
Claim 2
Independent Claim
117 words
THE METHOD OF APPLYING A REINFORCING MATERIAL TO AN INTERNAL CYLINDRICAL SURFACE WHICH INCLUDES, WINDING THE REINFORCING MATERIAL ON A SHAFT, PLACING THE SHAFT CONCENTRICALLY WITHIN A CYLINDER HAVING SAID INTERNAL CYLINDRICAL SURFACE THEREON AND ROTABLE ON THE AXIS THEREOF, THE SHAFT AND THE CYLINDRICAL SURFACE, AND OF THE CYLINDRICAL SURFACE THEREBY PROVIDING AN ANNULAR SPACE BETWEEN THE SHAFT AND THE CYLINDRICAL SURFACE, AND, REWINDING THE REINFORCING MATERIAL FRON THE SHAFT ONTO THE INTERNAL CYLINDRICAL SURFACE BY ROTATING AT LEAST THE CYLINDER TO PRODUCE A ROTATIONAL SPEED DIFFERENCE BETWEEN THE CYLINDER AND THE SHAFT SUCH AS TO UNWIND THE REINFORCING MATERIAL FROM THE SHAFT, THE REINFORCING MATERIAL REVERSING DIRECTION WITHIN SAID ANNULAR SPACE DURING THE REWINDING STEP.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the reinforcing material is cross wound on the shaft and cross rewound onto the internal cylindrical surface.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein the reinforcing material is a fabric wound on the shaft and rewound onto the internal cylindrical surface.
Claim 5
Dependent Claim
29 words
The method of claim 1 wherein the ends of the cylinder are sealed after the shaft is placed within the cylinder and before rotation is imparted to the cylinder.
Claim 6
Dependent Claim
55 words
The method of claim 1 wherein the reinforcing material wound on the shaft has a terminal winding end, retaining the terminal winding end against the shaft, and releasing the terminal winding end when the cylinder reaches a predetermined rotational speed to permit the terminal winding end to move into contact with the internal cylindrical surface.
Claim 7
Dependent Claim
36 words
The method of claim 1 wherein a synthetic resin liquid is supplied through a rotatable nozzle tube placed concentrically within the cylinder and rotated in the same direction as the direction of rotation of the cylinder.
Claim 8
Dependent Claim
41 words
The method of claim 1 wherein the shaft on which a reinforcing material is wound is a nozzle tube through which the synthetic resin is supplied after the reinforcing material has been rewound from the shaft onto the internal cylindrical surface.
Claim 9
Independent Claim
166 words
The method of applying a reinforcing material to an internal cylindrical surface which includes: winding the reinforcing material on a shaft, the reinforcing material having a terminal winding end; mounting the shaft concentrically within a cylinder having said internal cylindrical surface thereon and rotatable on the axis thereof, the shaft having a diameter less than that of the cylindrical surface thereby providing an annular space between the shaft and the cylindrical surface; retaining the terminal winding end of the reinforcing material out of contact with the internal cylindrical surface; rotating at least the cylinder to produce a rotational speed difference between the cylinder and shaft such as to unwind the reinforcing material from the shaft; and, permitting the terminal winding end of the reinforcing material to contact the internal cylindrical surface when the cylinder reaches a desired rotational speed, thereby initiating a rewinding of the reinforcing material from the shaft onto the internal cylindrical surface in which rewinding the material reverses direction within said annular space.
Claim 10
Independent Claim
166 words
The method of applying a reinforcing material to an internal cylindrical surface which includes: winding the reinforcing material on a shaft, the reinforcing material having a terminal winding end; mounting the shaft concentrically within a cylinder having said internal cylindrical surface thereon and rotatable on the axis thereof, the shaft having a diameter less than that of the cylindrical surface thereby providing an annular space between the shaft and the cylindrical surface; retaining the terminal winding end of the reinforcing material out of contact with the internal cylindrical surface; rotating at least the cylinder to produce a rotational speed difference between the cylinder and shaft such as to unwind the reinforcing material from the shaft; and, permitting the terminal winding end of the reinforcing material to contact the internal cylindrical surface when the cylinder reaches a desired rotational speed, thereby initiating a rewinding of the reinforcing material from the shaft onto the internal cylindrical surface in which rewinding the material reverses direction within said annular space.
Claim 11
Dependent Claim
37 words
The method of claim 8 in which the terminal winding end of the reinforcing material is retained out of contact with the internal cylindrical surface by rotating the shaft in the direction which winds the material thereon.
Claim 12
Dependent Claim
27 words
The method of claim 8 in which the terminal winding end of the reinforcing material is permitted to contact the internal cylindrical surface by rotating the shaft.
Claim 13
Dependent Claim
42 words
The method of claim 8 in which a thermosetting substance is applied to the reinforcing material prior to the winding of said material on the shaft, and said substance is set subsequent to said rewinding step and while the cylinder is rotating.
Claim 14
Dependent Claim
40 words
The method of claim 8 wherein a synthetic resin liquid is applied to the internal cylindrical surface prior to said rewinding step, and the synthetic resin liquid is set subsequent to said rewinding step and while the cylinder is rotating.
Claim 15
Dependent Claim
29 words
The method of claim 8 wherein a synthetic resin is applied to the internal cylindrical surface subsequent to said rewinding step and is set while the cylinder is rotating.
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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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |