US3942230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite metallic roll with release surface and method of making same
Assignee: Plasma Coatings Inc
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Filing: 1974-03-05
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Granted: 1976-03-09
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Expires: 1994-03-05
Abstract
Abstract A composite metallic roll or other member comprising a body member of a base metal, a porous plasma flame spray plate of a nickel chromium alloy, and a continuous film of a Teflon deposited over said plate and impregnating the same for gradual exposure over a predetermined life. The corresponding method comprises the steps of applying the plasma flame spray plate with a porous finish and a subsequent application of a thin uniform deposit of a Teflon (tetraflouroethylene). The Teflon is thereupon heated to and is above its fusion temperature whereby to provide an impregnate film for gradual exposure over a predetermined life.
Inventors
- 👤 Thomas E. Nalband
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:57
CPC Classifications
F; F16; F16C; F16C13/00; D; D21; D21G; D21G1/00; D21G1/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49544; Y10T29/4956; Y10T29/49563
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
73 words
A composite metallic roll or the like comprising a body member, a porous plate to a depth of 0.002 to 0.003 of an inch and comprising stainless steel, nickel, nickel chromium, molybdenum, a carbide, or a ceramic flame sprayed over the body member, and a continuous film of a fluorocarbon polymer impregnated into said porous plate for a gradual exposure over a predetermined life, said fluorocarbon polymer comprising tetrafluoroethylene, hexafluoropropylene, monochlorotrifluoroethylene, or tetrafluoroethylene-hexafluoropropylene.
Claim 2
Dependent Claim
73 words
A composite metallic roll or the like comprising a body member, a porous plate to a depth of 0.002 to 0.003 of an inch and comprising stainless steel, nickel, nickel chromium, molybdenum, a carbide, or a ceramic flame sprayed over the body member, and a continuous film of a fluorocarbon polymer impregnated into said porous plate for a gradual exposure over a predetermined life, said fluorocarbon polymer comprising tetrafluoroethylene, hexafluoropropylene, monochlorotrifluoroethylene, or tetrafluoroethylene-hexafluoropropylene.
Claim 3
Dependent Claim
27 words
A composite metallic roll or the like as set forth in claim 1 wherein said flame spray plate takes the form of a wire flame spray plate.
Claim 4
Dependent Claim
27 words
A composite metallic roll or the like as set forth in claim 1 wherein said flame spray plate takes the form of a plasma flame spray plate.
Claim 5
Dependent Claim
27 words
A composite metallic roll or the like as set forth in claim 3 wherein said plasma flame spray plate takes the form of a nickel chromium alloy.
Claim 6
Dependent Claim
22 words
A composite metallic roll or the like as set forth in claim 4 wherein said fluorocarbon polymer takes the form of tetrafluoroethylene.
Claim 7
Independent Claim
97 words
A method of making a composite metallic roll or the like comprising the steps of providing a body member, applying a porous plating to a depth of 0.002 to 0.003 inches to said body in a flame spraying process, said plating comprising stainless steel, nickel, nickel chromium, molybdenum, a carbide, or a ceramic, and applying a thin uniform deposit of a fluorocarbon polymer comprising tetrafluoroethylene, hexafluoropropylene, monochlorotrifluoroethylene, or tetrafluoroethylene-hexafluoropropylene, and heating said deposit to a level above the fusion temperature of the fluorocarbon polymer whereby to provide an impregnant film for gradual exposure over a predetermined life.
Claim 8
Independent Claim
97 words
A method of making a composite metallic roll or the like comprising the steps of providing a body member, applying a porous plating to a depth of 0.002 to 0.003 inches to said body in a flame spraying process, said plating comprising stainless steel, nickel, nickel chromium, molybdenum, a carbide, or a ceramic, and applying a thin uniform deposit of a fluorocarbon polymer comprising tetrafluoroethylene, hexafluoropropylene, monochlorotrifluoroethylene, or tetrafluoroethylene-hexafluoropropylene, and heating said deposit to a level above the fusion temperature of the fluorocarbon polymer whereby to provide an impregnant film for gradual exposure over a predetermined life.
Claim 9
Dependent Claim
27 words
A method of making a composite metallic roll or the like as set forth in claim 6 wherein said flame spraying process is of the wire type.
Claim 10
Dependent Claim
27 words
A method of making a composite metallic roll or the like as set forth in claim 6 wherein said flame spraying process is of the plasma type.
Claim 11
Dependent Claim
28 words
A method of making a composite metallic roll or the like as set forth in claim 8 wherein said plasma flame spraying process employs a nickel chromium alloy.
Claim 12
Dependent Claim
26 words
A method of making a composite metallic roll or the like as set forth in claim 6 wherein said fluorocarbon polymer takes the form of tetrafluoroethylene.
Claim 13
Dependent Claim
55 words
A method of making a composite metallic roll or the like as set forth in claim 10 wherein said step of heating takes the form of oven heating a metallic roll or other member to a temperature in the range of 700° to 750°F. for a time period in the range 15 to 25 minutes.
Claim 14
Dependent Claim
35 words
A method of making a composite metallic roll or the like as set forth in claim 11 wherein said temperature falls in the range 725° to 735° and said time period is approximately 20 minutes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |