US3671615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a composite board product from scrap materials
Assignee: Reynolds Metals Co
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Filing: 1970-11-10
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Granted: 1972-06-20
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Expires: 1990-11-10
Abstract
Abstract A method of making a composite board product from scrap materials such as are customarily available from a printing plant. The scrap materials are derived from three types of materials designated herein as plastic materials, fibrous materials and filler materials. The scrap materials are shredded or pulverized into small particles after which particles of a specified size are separated, filtered or culled out for further processing. The separated particles of the required size are homogenized in a mixing step and then placed in a preheated mold. Here the particles are subjected to unusually low pressure and temperature while formed into a finished product with the aid of a platen press. Typical finished products are employed as floor tiles, counter tops, wall panels or insulation.
Inventors
- 👤 Herbert K Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:57
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; D; D21; D21J; D21J1/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
43 words
A method of making a composite board product from scrap materials as defined in claim 1 wherein said plastic materials are selected from the group consisting of polyethylene, polypropylene, polyvinyl chloride, acrylic, polyester, polyamide, polysulfide, polycarbonate, ethylene-vinyl acetate, polyether, polystyrene, and combinations thereof.
Claim 2
Dependent Claim
32 words
A method of making a composite board product from scrap materials as defined in claim 1 wherein said fibrous materials are selected from the group consisting of paper, paperboard, cloth and rags.
Claim 3
Dependent Claim
34 words
A method of making a composite board product from scrap materials as defined in claim 1 wherein said filler materials are selected from the group consisting of metallic foils, ink pigments, plasticizers, and wax.
Claim 4
Dependent Claim
43 words
A method of making a composite board product from scrap materials as defined in claim 1 wherein said separating step consists of filtering said separated particles through screens having a mesh in a range from about one-tenth inch to about one sixty-fourth inch.
Claim 5
Dependent Claim
27 words
A method of making a composite board product from scrap materials as defined in claim 5 wherein said screen has a mesh of about one thirty-second inch.
Claim 6
Dependent Claim
24 words
A method of making a composite board product from scrap materials as defined in claim 1 wherein said plastic materials are thermoplastic in nature.
Claim 7
Dependent Claim
43 words
A method of making a composite board product from scrap materials as defined in claim 7 wherein said plastic materials are selected from the group consisting of polyethylene, polypropylene, polyvinyl chloride, acrylic, polyester, polyamide, polysulfide, polycarbonate, ethylene-vinyl acetate, polyether, polystyrene and combinations thereof.
Claim 8
Dependent Claim
30 words
A method of making a composite board product from scrap materials as defined in claim 1 wherein said pressure range is limited to between about 80 psi and 100 psi.
Claim 9
Dependent Claim
42 words
A method of making a composite board product from scrap materials as defined in claim 1 wherein said homogenized particles are compressed between said platens of said forming press for a period of time from about 30 seconds to about 90 seconds.
Claim 10
Dependent Claim
35 words
A method of making a composite board product from scrap materials as defined in claim 1 including the additional step of coating said platents of said forming press with a release coating consisting of polytetrafluoroethylene.
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |