USRE28574E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber reinforced hot pressing molds
Assignee: —
•
Filing: 1971-12-17
•
Granted: 1975-10-21
•
Expires: 1991-12-17
Abstract
Abstract (A method for reinforcing a refractory mold by wrapping a carbonaceous textile material around the surface of the mold. The textile material may be coated with a binder and the assembly subsequently baked to a temperature sufficient to coke the binder in order to reinforce and mechanically link the textile material) A fiber reinforced hot pressing mold composed of a conventional refractory mold encased by a carbonaceous textile material. The textile material is coated with a binder prior to, or subsequent to, being wrapped around the surface of the mold and then the mold assembly so prepared is baked to a temperature sufficient to coke the binder in order to reinforce and mechanically link the textile material.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:27
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/06; B22C9/061
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
103 words
A METHOD FOR REINFORCING A REFACTORY MOLD COMPRISING: (A) APPLYING A THERMOSETTTING BINDER TO AT LEAST ONE SIDE OF A FLEXIBLE TEXTILE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CARBON YARN, GRAPHITE YARN, CARBON CLOTH, GRAPHITE CLOTH, CARBON TAPE AND GRAPHITE TAPE, SAID CARBONACEOUS BINDER BEING CAPABLE OF COKING AT HIGH TEMPERATURES SO AS TO PROVIDE A MECHANICAL LINKAGE FOR THE TEXTILE MATERIALS: (B) WRAPPING AT LEAST ONE LAYER OF SAID TEXTILE MATERIAL SUBSTANTIALLY AROUND THE OUTSIDE SURFACE OF THE REFRACTRY MOLD, AND (C) HEATING SAID MOLD, SAID TEXTILE MATERIAL AND SAID BINDER TO A TEMPERATURE SUFFICIENT TO CURE AND COKE SAID BINDER.
Claim 2
Independent Claim
103 words
A METHOD FOR REINFORCING A REFACTORY MOLD COMPRISING: (A) APPLYING A THERMOSETTTING BINDER TO AT LEAST ONE SIDE OF A FLEXIBLE TEXTILE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CARBON YARN, GRAPHITE YARN, CARBON CLOTH, GRAPHITE CLOTH, CARBON TAPE AND GRAPHITE TAPE, SAID CARBONACEOUS BINDER BEING CAPABLE OF COKING AT HIGH TEMPERATURES SO AS TO PROVIDE A MECHANICAL LINKAGE FOR THE TEXTILE MATERIALS: (B) WRAPPING AT LEAST ONE LAYER OF SAID TEXTILE MATERIAL SUBSTANTIALLY AROUND THE OUTSIDE SURFACE OF THE REFRACTRY MOLD, AND (C) HEATING SAID MOLD, SAID TEXTILE MATERIAL AND SAID BINDER TO A TEMPERATURE SUFFICIENT TO CURE AND COKE SAID BINDER.
Claim 3
Dependent Claim
52 words
The method as in claim 1 wherein said carbonaceous binder is selected from at least one of the groups consisting of phenol-formaldehyde resins and epoxy resins, and wherein the step of providing a recess about the periphery of the mold is carried out prior to the winding of the textile material thereon.
Claim 4
Dependent Claim
28 words
The method as in claim 1 wherein said wrapping is carried out by rotating said mold while simultaneously wrapping the textile material on the outside of the mold.
Claim 5
Dependent Claim
25 words
The method of claim 1 wherein the textile material is subjected to a tensional force while being wrapped about the surface of the refractory mold.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein an additional heating step is added between steps (b) and (c) to cure said binder.
Claim 7
Independent Claim
58 words
A method of producing a reinforced refractory mold comprising the steps of: wrapping a flexible textile material around a refractory mold, said material selected from the group consisting of carbon yarn, graphite yarn, carbon cloth, graphite cloth, carbon tape and graphite tape; inducing a compressional pre-load into the mold wall; and bonding said textile material to the mold.
Claim 8
Independent Claim
58 words
A method of producing a reinforced refractory mold comprising the steps of: wrapping a flexible textile material around a refractory mold, said material selected from the group consisting of carbon yarn, graphite yarn, carbon cloth, graphite cloth, carbon tape and graphite tape; inducing a compressional pre-load into the mold wall; and bonding said textile material to the mold.
Claim 9
Dependent Claim
49 words
A reinforced refractory mold comprising an inner refractory mold encased by a flexible textile material wound around the inner mold and bound thereto by a binder, said flexible textile material selected from the group consisting of carbon yarn, graphite yarn, carbon cloth, graphite cloth, carbon tape and graphite tape.
Claim 10
Dependent Claim
49 words
A reinforced refractory mold comprising an inner refractory mold encased by a flexible textile material wound around the inner mold and bound thereto by a binder, said flexible textile material selected from the group consisting of carbon yarn, graphite yarn, carbon cloth, graphite cloth, carbon tape and graphite tape.
Claim 11
Dependent Claim
20 words
A reinforced mold as set forth in claim 7 wherein said flexible textile material is tensionally wound around said mold.
Claim 12
Dependent Claim
28 words
A high strength hot-press mold comprising an inner graphite mold encased by a high strength graphite fiber wound around the inner mold and bound thereto by a binder.
Claim 13
Dependent Claim
28 words
A high strength hot-press mold comprising an inner graphite mold encased by a high strength graphite fiber wound around the inner mold and bound thereto by a binder.
Claim 14
Dependent Claim
24 words
A mold as set forth in claim 9 wherein said graphite fiber is tensionally wound to induce a compressional pre-load into the mold wall.
Claim 15
Dependent Claim
14 words
A mold as set forth in claim 10 wherein said binder is phenol-formaldehyde resin.
Claim 16
Independent Claim
38 words
A method of producing a high strength hot-press mold which method comprises: wrapping high strength graphite fibers around an inner graphite mold; inducing a compressional pre-load into the mold wall and bonding the fibers to the mold wall.
Claim 17
Independent Claim
38 words
A method of producing a high strength hot-press mold which method comprises: wrapping high strength graphite fibers around an inner graphite mold; inducing a compressional pre-load into the mold wall and bonding the fibers to the mold wall.
References Cited (Backward Citations)
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |