Patent US3771209A successfully refreshed from Google Patents.
US3771209A
Expired / Lapsed
US
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Process for reclaiming non-metallic materials joined together by metal fasteners
Assignee: Individual
•
Filing: 1972-10-10
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Granted: 1973-11-13
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Expires: 1992-10-10
Abstract
Abstract A process for separating non-metallic materials joined together by a metallic fastener whereby sufficient heat is generated in the metal fastener to disintegrate a portion of the material adjacent the fastener so as to disjoin the metallic fastener from the material. This disclosure is concerned with a process for separating nonmetallic material joined together by a metallic fastener and, more particularly is concerned with a process for reclaiming wood from wooden structures which are assembled by use of metallic fasteners.
Inventors
- 👤 J Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:53
CPC Classifications
B; B27; B27M; B27M1/00; B27M1/06; B23; B23P; B23P19/00; B23P19/04; B23P19/041; H; H05; H05B; H05B6/00; H05B6/02; H05B6/10; H05B6/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49815; Y10T29/49821
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
56 words
A process for separating non-metallic cellulosic materials joined together by at least one metallic fastener, said process comprising selectively heating the fastener to increase its temperature; maintaining the temperature of the fastener at a temperature sufficient only to disintegrate a portion of the materials immediately adjacent to the fastener; and segregating the materials from the fastener.
Claim 2
Dependent Claim
56 words
A process for separating non-metallic cellulosic materials joined together by at least one metallic fastener, said process comprising selectively heating the fastener to increase its temperature; maintaining the temperature of the fastener at a temperature sufficient only to disintegrate a portion of the materials immediately adjacent to the fastener; and segregating the materials from the fastener.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the heat is generated by induction.
Claim 4
Dependent Claim
19 words
The process of claim 1 including the step of vibrating the materials after said portion of materials is disintegrated.
Claim 5
Dependent Claim
30 words
The procss of claim 1 wherein the fastener is segregated from the materials by subjecting them to a magnetic field whereby the fastener is attracted and separated from the materials.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein the materials are paper.
Claim 7
Dependent Claim
10 words
The process of claim 2 wherein the materials are wood.
Claim 8
Dependent Claim
12 words
The process of claim 6 wherein the wood materials are shipping pallets.
Claim 9
Dependent Claim
71 words
A process of separating non-metallic cellulosic materials, which materials are joined together by at least one metallic fastener, said process comprising selectively inducing a current to flow through the fastener to increase its temperature; maintaining the flow of current through the fastener until its temperature is raised to a point sufficient only to disintegrate a portion of the materials immediately adjacent to the fastener; and segregating the materials from the fastener.
Claim 10
Dependent Claim
71 words
A process of separating non-metallic cellulosic materials, which materials are joined together by at least one metallic fastener, said process comprising selectively inducing a current to flow through the fastener to increase its temperature; maintaining the flow of current through the fastener until its temperature is raised to a point sufficient only to disintegrate a portion of the materials immediately adjacent to the fastener; and segregating the materials from the fastener.
Claim 11
Dependent Claim
14 words
The process of claim 8 wherein an alternating current is induced into the fastener.
Claim 12
Dependent Claim
19 words
The process of claim 8 including the step of vibrating the materials after said portion of materials is disintegrated.
Claim 13
Dependent Claim
30 words
The process of claim 8 wherein the fastener is segregated from the materials by subjecting them to a magnetic field whereby the fastener is attracted and separated from the materials.
Claim 14
Dependent Claim
10 words
The process of claim 8 wherein the materials are paper.
Claim 15
Dependent Claim
10 words
The process of claim 8 wherein the materials are wood.
Claim 16
Dependent Claim
11 words
The process of claim 13 wherein the wood materials are pallets.
Claim 17
Dependent Claim
94 words
A process for continuously reclaiming wood from wooden structures composed of wooden components being joined by at least on fero-metallic fastener, said process comprising: a. transporting the structures to a current-inducing zone; b. passing the structures through the zone to selectively induce a current to flow through the fastener to selectively heat the fastener; c. maintaining the flow of current through the fastener until its temperature is raised to a point sufficient to combustively decompose a portion of the wooden components immediately adjacent to the fastener; and d. segregating the wood from the fastener.
Claim 18
Dependent Claim
19 words
The process of claim 15 including the step of vibrating the structures after said portion of wood is decomposed.
Claim 19
Dependent Claim
30 words
The process of claim 15 wherein the fastener is segregated from the wood by subjecting it to a magnetic field whereby the fastener is attracted and separated from the wood.
Claim 20
Dependent Claim
19 words
The process of claim 15 wherein any gases or combustion products are exhausted from the zone and thereafter filtered.
References Cited (Backward Citations)
US1385079A
Cited
US1569397A
Cited
US2291862A
Cited
GB577830A
Cited
US2513431A
Cited
US2593843A
Cited
US2699483A
Cited
US3697715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |