Patent US3917149A successfully refreshed from Google Patents.
US3917149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing embossed sintered articles of manufacture
Assignee: Mallory Composites Inc
•
Filing: 1972-09-15
•
Granted: 1975-11-04
•
Expires: 1992-09-15
Abstract
Abstract Process of preparing embossed sintered articles of manufacture by mechanically working a mixture of solid particulate material selected from the group consisting of ceramics, metals, intermetallic compounds, plastics or combinations thereof and a particulate polytetrafluoroethylene (PTFE) resin to form a nonwoven cloth, folding the cloth, mechanically working the folded cloth along a crosswise axis to the direction of work in forming the initial cloth, forming in the resulting cloth the pattern to be replicated and finally heating the cloth while on a substrate to a temperature sufficient to sinter said solid particulate material. The process is useful in the preparation of embossed sintered articles of manufacture including tools, printing rolls and others. Also disclosed is a process of preparing an article having an embossed pattern on at least one surface thereof which comprises mixing and working solid particulate braze alloy material and particulate polytetrofluorethylene resin to provide a first cloth, mixing and working solid particulate filler material and particulate polytetrafluoroethylene resin to provide a second cloth, forming a surface of the cloth containing filler material into a pattern to be replicated, and heating the cloths while contiguous to each other to a temperature sufficient to drive off polytetrofluorethylene and infiltrate braze alloy into the cloth containing filler material by melting braze alloy to provide an article having an embossed pattern on a surface thereof.
Inventors
- 👤 Ernest J Breton
- 👤 Jack D Wolf
- 👤 Dexter Worden
- 👤 John T Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:46
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/14; B22; B22F; B22F3/00; B22F3/20; B23; B23K; B23K35/00; B23K35/02; B23K35/0222; B23K35/0244; B32B3/00; B32B3/26; B32B3/30; B23K35/0233; B23K35/0238; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2305/00; B32B2305/80; Y; Y10; Y10S; Y10S228/00; Y10S228/903; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/927; Y10S428/932; Y10T; Y10T428/00; Y10T428/12; Y10T428/12007; Y10T428/12014; Y10T428/1216; Y10T428/12389; Y10T428/12396; Y10T428/12493; Y10T428/12771; Y10T428/12778
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
171 words
A PROCESS OF PREPARING AN ARTICLE HAVING AN EMBOSSED PATTERN ON AT LEAST ONE SURFACE THEREOF WHICH COMPRISES MIXING SOLID PARTICULATE BRAZE ALLOY MATERIAL AND PARTICULATE POLYTETRAFLUOROETHYLENE RESIN TO PROVIDE A FIRST MIXTURE AND MIXING SOLID PARTICULATE FILLER MATERIAL AND PARTICULATE POLYTERAFLUOROETHYLENE RESIN TO PROVIDE A SECOND MIXTURE EACH OF THE MIXTURES CONTAINING ABOUT 1 TO ABOUT 20 VOLUME PERCENT POLYTETRAFLUOROETHYLENE RESIN, MECHANICALLY WORKING EACH OF THE MIXTURE UNTIL THE POLYTETRAFLUOROETHYLENE FIBRILLATES AND THE RESULTING FIBRILS INTERCONNECT AND ENTRAP SOLID PARTICULATE MATERIAL TO PROVIDE NON-WOVENCLOTHS HAVING HANDLEABILITY AND FLEXIBILITY, FOLDING EACH OF THE CLOTHS, MECHANICALLY WORKING EACH OF THE FOLDED CLOTHES ALONG A CROSSWISE AXIS TO THE DIRECTION OF THE INITIAL MECHANICAL WORKING STEP, FORMING A SURFACE OF THE CLOTH CONTAINING FILLER MATERIAL INTO A PATTERN TO BE REPLICATED, AND HEATING THE CLOTHS WHILE CONTIGUOUS TO EACH OTHER TO A TEMPERATURE SUFFICIENT TO DRIVE OFF POLYTETRAFLUOROETHYLENE AND INFILTRATE BRAZE ALLOY INTO THE CLOTH CONTAINING FILLER MATERAL BY MELTING BRAZE ALLOY TO PROVIDE AN ARTICLE HAVING EMBOSSED PATTERN ON A SURFACE THEREOF,
Claim 2
Dependent Claim
171 words
A PROCESS OF PREPARING AN ARTICLE HAVING AN EMBOSSED PATTERN ON AT LEAST ONE SURFACE THEREOF WHICH COMPRISES MIXING SOLID PARTICULATE BRAZE ALLOY MATERIAL AND PARTICULATE POLYTETRAFLUOROETHYLENE RESIN TO PROVIDE A FIRST MIXTURE AND MIXING SOLID PARTICULATE FILLER MATERIAL AND PARTICULATE POLYTERAFLUOROETHYLENE RESIN TO PROVIDE A SECOND MIXTURE EACH OF THE MIXTURES CONTAINING ABOUT 1 TO ABOUT 20 VOLUME PERCENT POLYTETRAFLUOROETHYLENE RESIN, MECHANICALLY WORKING EACH OF THE MIXTURE UNTIL THE POLYTETRAFLUOROETHYLENE FIBRILLATES AND THE RESULTING FIBRILS INTERCONNECT AND ENTRAP SOLID PARTICULATE MATERIAL TO PROVIDE NON-WOVENCLOTHS HAVING HANDLEABILITY AND FLEXIBILITY, FOLDING EACH OF THE CLOTHS, MECHANICALLY WORKING EACH OF THE FOLDED CLOTHES ALONG A CROSSWISE AXIS TO THE DIRECTION OF THE INITIAL MECHANICAL WORKING STEP, FORMING A SURFACE OF THE CLOTH CONTAINING FILLER MATERIAL INTO A PATTERN TO BE REPLICATED, AND HEATING THE CLOTHS WHILE CONTIGUOUS TO EACH OTHER TO A TEMPERATURE SUFFICIENT TO DRIVE OFF POLYTETRAFLUOROETHYLENE AND INFILTRATE BRAZE ALLOY INTO THE CLOTH CONTAINING FILLER MATERAL BY MELTING BRAZE ALLOY TO PROVIDE AN ARTICLE HAVING EMBOSSED PATTERN ON A SURFACE THEREOF,
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein at least two particulate filler materials are employed with polytetrafluoroethylene resin to provide a second mixture.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein the particulate filler material is selected from the group consisting of ceramics, metals, intermetallic compounds, plastics, or combinations thereof.
Claim 5
Dependent Claim
48 words
The process of claim 3 wherein the particulate material is an intermetallic abrasive material selected from the group consisting of metallic carbides, nitrides, borides and silicides, or combinations thereof and the braze alloy is selected from the group consisting of iron base, nickel base, and cobalt base alloys.
Claim 6
Dependent Claim
26 words
The process of claim 4 wherein the intermetallic abrasive is tungsten carbide, chromium carbide, tantalum carbide, titanium carbide, molybdenum carbide, silicon carbide, boron carbide or diamond.
Claim 7
Dependent Claim
30 words
The process of claim 1 wherein the pattern is formed with a die which is an electrode which, together with another electrode, also serves as a means for heating cloth.
Claim 8
Dependent Claim
28 words
The process of claim 1 wherein the amount of fibrillated polytetrafluoroethylene resin is 1 to 10% by volume of the mixture of resin and solid particulate filler material.
Claim 9
Dependent Claim
29 words
The process of claim 1 wherein the diameter of said solid particulate filler material is not in excess of about 25% of the resolution desired of the embossed pattern.
Claim 10
Dependent Claim
20 words
The process of claim 1 wherein the diameter of said solid particulate filler material is about 0.1 to 300 microns.
Claim 11
Dependent Claim
76 words
The process of claim 1 including the further steps of, prior to forming a surface of the cloth containing filler material, placing the cloths on a substrate, forming a surface of the cloth containing filler material into a pattern to be replicated, and heating the cloths to a temperature sufficient to drive off polytetrafluoroethylene and infiltrate braze alloy into the cloth containing filler material by melting braze alloy to provide an embossed pattern over the substrate.
Claim 12
Dependent Claim
21 words
The process of claim 10, wherein an adhering substrate is employed and the brazing alloy forms a bond with the substrate.
References Cited (Backward Citations)
US2456262A
Cited
US2593582A
Cited
US3185566A
Cited
US2845660A
Cited
US3086860A
Cited
US2866886A
Cited
US3155502A
Cited
US3315020A
Cited
US3556161A
Cited
US3395049A
Cited
US3281511A
Cited
US3365785A
Cited
US3486961A
Cited
US3743556A
Cited
US3778586A
Cited
US3717442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |