Patent US3607600A successfully refreshed from Google Patents.
US3607600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite molding process and product
Assignee: Hauck Manufacturing Inc
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Filing: 1969-07-15
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Granted: 1971-09-21
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Expires: 1989-07-15
Abstract
Abstract Strong, abrasion-resistant composite molded articles are produced that include a reinforced synthetic resin backing layer and an elastomeric surface layer that is molded to predetermined dimensions. The articles are molded by applying a first coating of an elastomer on a treated mold surface and then curing the elastomer just enough to produce a tack-free surface. A second coating of liquid elastomer is applied to the tack-free surface and fibers are deposited on the liquid coating of elastomer and worked to form a continuous fiber coating. Subsequently, at least one layer of reinforced synthetic resin is applied and rolled into the exposed surface of the fibers before the second elastomer coating solidifies. The fibers which extend from the second elastomer coating into the backing layer provide a strong mechanical bond that prevents separation of the elastomer layers from the synthetic resin. A porous reinforcing mat can be inserted into the first coating of elastomer while it is liquid to dramatically increase the article''s tear strength and flexural strength.
Inventors
- 👤 Robert E Schreter
- 👤 John A Marino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:58
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/426; F04D29/4286; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
39 words
The process of claim 1 in which a porous web of reinforcing material is placed on the first coating of elastomer while the first coating is fluid, to increase the tear strength of the elastomeric surface of the article.
Claim 2
Dependent Claim
12 words
The process of claim 2 in which the elastomer is a polyurethane.
Claim 3
Dependent Claim
13 words
The process of claim 3 in which the elastomer is a polyether polyurethane.
Claim 4
Dependent Claim
15 words
The process of claim 1 in which the bonding fibers are chopped fiber glass strands.
Claim 5
Dependent Claim
32 words
The process of claim 5 in which the bonding fibers are rolled to cause the bonding fibers to form a substantially continuous coating on the surface of said first coating of elastomer.
Claim 6
Dependent Claim
149 words
A process for molding a composite article including a polyurethane surface layer which is molded to predetermined external dimensions, and a reinforced polyester backing layer which provides structural strength comprising: a. treating a mold surface with a release agent; b. applying a first coating of polyurethane on the treated mold surface, and curing the polyurethane just long enough to produce a tack-free surface; c. applying a second coating of polyurethane to the tack-free surface of the first coating; d. depositing fibers on the liquid second coating of polyurethane and working the fibers to form a substantially continuous layer of fibers, the fibers being long enough to form the continuous fiber layer and still protrude into the adjacent layers; and e. applying at least one coating of polyester resin to the exposed surface of the second polyurethane coating, said resin coating being applied before the second polyurethane coating completely solidifies.
Claim 7
Dependent Claim
12 words
The process of claim 7 in which the polyurethane is polyether polyurethane.
Claim 8
Dependent Claim
27 words
The process of claim 7 in which chopped fiber glass strands are applied on the liquid second coating of polyurethane and rolled to form a continuous coating.
Claim 9
Dependent Claim
34 words
The process of claim 9 in which the liquid surface of the polyester resin coating is rolled to remove entrapped air and to cause the bonding fibers to form a substantially continuous fiber coating.
Claim 10
Dependent Claim
39 words
The process of claim 7 in which a porous web of reinforcing material is placed on the first coating of polyurethane while the first coating is fluid, to increase the tear strength of the elastomeric surface of the article.
Claim 11
Dependent Claim
80 words
A strong, abrasion-resistant, molded composite article comprising: a. an elastomer layer molded to accurate surface dimensions and contours including a first outer coating and a second coating; b. a composite layer abutting said second coating and including bonding fibers which form a fiber layer, and intermingled elastomer and synthetic resin; and c. a synthetic resin backing layer abutting the composite layer with the bonding fibers extending into said backing layer to mechanically bond said elastomeric layer and said backing layer.
Claim 12
Dependent Claim
23 words
The article of claim 11 in which a porous fibrous mat is positioned between said first and second coatings of said elastomeric layer.
Claim 13
Dependent Claim
25 words
The article of claim 12 in which the elastomer is a polyurethane, the synthetic resin is a polyester, and the bonding fibers are fiber glass.
Claim 14
Dependent Claim
115 words
An inlet half of a casing for a centrifugal air blower comprising: a. a polyurethane layer molded to accurate surface dimensions and contours and including a first coating and a second coating; b. a composite layer abutting said second coating and including bonding fibers which form a fiber layer, and intermingled elastomer and synthetic resin; c. a synthetic resin backing layer abutting the second layer with the bonding fibers extending into said backing layer to mechanically bond said elastomeric layer and said backing layer; and d. the inlet casing half having a generally annular shape and including a central inlet opening with the polyurethane layer providing an abrasion-resistant surface for the interior of the casing.
Claim 15
Dependent Claim
23 words
The article of claim 14 In which a porous fibrous mat is positioned between said first and second coatings of said elastomeric layer.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |