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US4112038A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for producing molded articles

Assignee: Bolivia Lumber Co
•
Filing: 1976-09-02
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Granted: 1978-09-05
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Expires: 1996-09-02
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Abstract

Abstract A method of producing molded articles comprising taking a by-product from a main process, that by-product comprising a contaminated thermoplastic material impregnated with a fibrous material, usually paper and in some instances additionally a metallic foil, removing a portion of the fibrous material for re-use in the main process and thereafter heating and molding the remaining material to form an article. In instances where the thermoplastic material is not contaminated with a fibrous material, it may be considered desirable to introduce such material.

Inventors

  • 👤 Lynn Thomas Garner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 06:59
CPC Classifications
B; B29; B29B; B29B17/00; B29B17/0026; B29B17/0042; B29B17/02; B29B2017/0213; B29B2017/0255; B29B2017/0258; B29K; B29K2711/00; B29K2711/12; B29L; B29L2009/00; B29L2009/003; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S264/00; Y10S264/911; Y10S264/913; Y10S264/914; Y10S264/918

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 173 words
Method of producing a molded article of desired shape from a by-product of a process producing a paper product having a thermoplastic material coating said by-product comprising a thermoplastic material impregnated with a fibrous material, comprising: a. separating a portion of the fibrous material from said by-product; b. returning said portion of separated fibrous material to said paper product process; c. delivering the remaining portion of said thermoplastic material and fibrous material to the exit side of a nip defined between a pair of contra-rotating heated drums to heat and render said remaining materials plastic, and to cause said remaining materials to adhere to the surfaces of said drums, and to be carried thereon from said exit side of said nip towards the entrance side of said nip; d. removing said adhered plastic remaining materials from the surfaces of said rotating drums at a location adjacent the entrance side of said nip; e. delivering said plastic remaining materials to a molding means; and f. molding said plastic materials to a desired article shape.
Claim 2
Dependent Claim 173 words
Method of producing a molded article of desired shape from a by-product of a process producing a paper product having a thermoplastic material coating said by-product comprising a thermoplastic material impregnated with a fibrous material, comprising: a. separating a portion of the fibrous material from said by-product; b. returning said portion of separated fibrous material to said paper product process; c. delivering the remaining portion of said thermoplastic material and fibrous material to the exit side of a nip defined between a pair of contra-rotating heated drums to heat and render said remaining materials plastic, and to cause said remaining materials to adhere to the surfaces of said drums, and to be carried thereon from said exit side of said nip towards the entrance side of said nip; d. removing said adhered plastic remaining materials from the surfaces of said rotating drums at a location adjacent the entrance side of said nip; e. delivering said plastic remaining materials to a molding means; and f. molding said plastic materials to a desired article shape.

References Cited (Backward Citations)

US3082055A Cited
US3574050A Cited
US3599788A Cited
US3607999A Cited
US3718536A Cited
US3671615A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-09-04 1982-03-06 1982-09-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-09-04 1986-03-06 1986-09-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-09-04 1990-03-06 1990-09-05 $7700.00 Window Closed / Lapsed

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