Patent US3864206A successfully refreshed from Google Patents.
US3864206A
Expired / Lapsed
US
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Structurally Supported, Dimensionally Accurate, Shaped Articles and Method of Producing the Same
Assignee: Individual
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Filing: 1972-04-17
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Granted: 1975-02-04
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Expires: 1992-04-17
Abstract
Abstract A method of producing dimensionally accurate, structurally supported, shaped articles includes forming a wet felted mat of pulped fibers on a foraminous forming mold, filling a hollow portion of the wet felted mat with a rigid core such as a plastic foam while the felted mat is supported by the forming mold, bonding the core material to the wet felted mat to form an integral shell and core for the shaped article, removing the integral shell and core, and drying the wet felted mat with the core acting as a transfer means for removing the integral shell and core and acting as a form to retain dimensional stability of the felted mat during drying. A structurally supported, dimensionally accurate, shaped article is produced by the above method.
Inventors
- 👤 Rodney V Linderoth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:57
CPC Classifications
D; D21; D21J; D21J7/00; B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/14; B29C33/00; B29C33/44; B29C33/46; B29C35/00; B29C35/02; B29C35/0222; B29C37/00; B29C37/0025; B29C37/0028; B29K; B29K2105/00; B29K2105/06; B29K2105/12; Y; Y10; Y10S; Y10S264/00; Y10S264/06; Y10S264/07; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/24612; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249972; Y10T428/249986
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
120 words
A METHOD OF PRODUCING DIMENSIONALLY ACCURATE, STRUCTURALLY SUPPORTED, SHAPED ARTICLES OF PULPED FIBERS COMPRISING THE STEPS OF FORMING A WET FELTED MAT OF PULPED FIBERS ON A FORAMINOUS FORMING MOLD, THE WET FELTED MAT HAVING A HOLLOW PORTION; FILLING THE HOLLOW PORTION OF THE WET FELTED MAT WITH A CORE MATERIAL WHILE THE WET FELTED MAT IS SUPPORTED ON THE FORAMINOUS FORMING MOLD; CURING THE CORE MATERIAL AND BONDING THE SAME TO THE WET FELTED MAT TO FORM A CORE INTEGRAL WITH THE WET FELTED MAT; REMOVING THE WET FELTED MAT AND CORE FROM THE FORAMINOUS FORMING MOLD WITH THE CORE ACTING IN A TRANSFER SUPPORT CAPACITY BEFORE DRYING OF THE WET FELTED MAT; AND DRYING THE WET FELTED MAT.
Claim 2
Independent Claim
120 words
A METHOD OF PRODUCING DIMENSIONALLY ACCURATE, STRUCTURALLY SUPPORTED, SHAPED ARTICLES OF PULPED FIBERS COMPRISING THE STEPS OF FORMING A WET FELTED MAT OF PULPED FIBERS ON A FORAMINOUS FORMING MOLD, THE WET FELTED MAT HAVING A HOLLOW PORTION; FILLING THE HOLLOW PORTION OF THE WET FELTED MAT WITH A CORE MATERIAL WHILE THE WET FELTED MAT IS SUPPORTED ON THE FORAMINOUS FORMING MOLD; CURING THE CORE MATERIAL AND BONDING THE SAME TO THE WET FELTED MAT TO FORM A CORE INTEGRAL WITH THE WET FELTED MAT; REMOVING THE WET FELTED MAT AND CORE FROM THE FORAMINOUS FORMING MOLD WITH THE CORE ACTING IN A TRANSFER SUPPORT CAPACITY BEFORE DRYING OF THE WET FELTED MAT; AND DRYING THE WET FELTED MAT.
Claim 3
Dependent Claim
38 words
The method as recited in claim 1 wherein said filling step includes filling the hollow portion of the wet felted mat with a liquid foamable polymer, and said bonding step includes foaming and curing the polymer in situ.
Claim 4
Dependent Claim
35 words
The method as recited in claim 1 wherein said filling step includes disposing an aggregate and an adhesive in the hollow portion, and said bonding step includes bonding the aggregate to the wet felted mat.
Claim 5
Dependent Claim
14 words
The method as recited in claim 3 wherein the aggregate includes expanded polystyrene beads.
Claim 6
Dependent Claim
79 words
The method as recited in claim 1 wherein said forming step includes supporting the foraminous forming mold in a forming housing immersed in a slurry of pulped fibers and liquid, and supplying a vacuum to the forming housing to draw the pulped fibers to the foraminous forming mold to form the wet felted mat thereon, and further comprising the step of transfering the wet felted mat and foraminous forming mold to a filling housing prior to said filling step.
Claim 7
Dependent Claim
19 words
The method as recited in claim 5 wherein said removing step includes supplying compressed air to the filling housing.
Claim 8
Dependent Claim
31 words
The method as recited in claim 1 wherein said core material is a plastic foam and the curing and bonding thereof is effected by the exothermic reaction of the plastic foam.
Claim 9
Dependent Claim
16 words
The method as recited in claim 7 wherein said core material further includes an aggregate filler.
Claim 10
Dependent Claim
19 words
The method as recited in claim 1 wherein said core material includes an aggregate filler and a bonding adhesive.
Claim 11
Dependent Claim
15 words
The method as recited in claim 9 wherein said aggregate filler includes expanded polystyrene beads.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |