Patent US1395818A successfully refreshed from Google Patents.
US4267136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of thin, plastic-reinforced, hydraulically bound boards
Assignee: Stamicarbon BV
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Filing: 1978-08-28
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Granted: 1981-05-12
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Expires: 1998-08-28
Abstract
Abstract A continuous process for manufacturing composite articles, such as thin hydraulically bound boards, which are reinforced with separate layers of a stretched, fibrillated, extended plastics net reinforcing material is disclosed. An aqueous suspension of cement or other material is applied onto and into the plastics network, dewatered, taken up and rolled into a composite cylinder until the desired thickness is reached. The cylinder is then cut axially, given the desired shape and cured.
Inventors
- 👤 Jan M. J. M. Bijen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:11
CPC Classifications
C; C04; C04B; C04B16/00; C04B16/04; C04B16/06; C04B16/0608; B; B28; B28B; B28B1/00; B28B1/30; B28B1/40; B28B1/42; B28B23/00; B28B23/0006; Y; Y10; Y10S; Y10S264/00; Y10S264/47; Y10T; Y10T442/00; Y10T442/10; Y10T442/184; Y10T442/198
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
157 words
A continuous process for the manufacture of composite articles consisting of a hydraulically bound material having an extended net plastics material incorporated therein, said process including the successive steps of (a) contacting a stretched, fibrillated, extended plastics net reinforcing material in the form of a continuous belt with an aqueous suspension of hydraulic binding material thereby forming a thin layer of aqueous suspension on and in the net while adjusting the rate of application and thickness of the thin layer as it is formed; (b) removing excess water from the thus formed thin layer; (c) rolling the dewatered thin layer onto a forming roller and continuing such rolling until the predetermined number of continuous net layers desired in the final product are formed in the composite; (d) removing the rolled composite from the roller when the predetermined thickness is obtained; (e) shaping the composite; and (f) hardening the shaped composite to form the desired shaped composite article.
Claim 2
Dependent Claim
157 words
A continuous process for the manufacture of composite articles consisting of a hydraulically bound material having an extended net plastics material incorporated therein, said process including the successive steps of (a) contacting a stretched, fibrillated, extended plastics net reinforcing material in the form of a continuous belt with an aqueous suspension of hydraulic binding material thereby forming a thin layer of aqueous suspension on and in the net while adjusting the rate of application and thickness of the thin layer as it is formed; (b) removing excess water from the thus formed thin layer; (c) rolling the dewatered thin layer onto a forming roller and continuing such rolling until the predetermined number of continuous net layers desired in the final product are formed in the composite; (d) removing the rolled composite from the roller when the predetermined thickness is obtained; (e) shaping the composite; and (f) hardening the shaped composite to form the desired shaped composite article.
Claim 3
Dependent Claim
31 words
The process as claimed in claim 1 wherein the continuous belt of net is contacted with the aqueous suspension by immersing the net in the suspension in contact with a sieve.
Claim 4
Dependent Claim
26 words
The process as claimed in claim 1 wherein the net is contacted with the aqueous suspension by sprinkling or spraying the aqueous suspension onto the net.
Claim 5
Dependent Claim
24 words
The process as claimed in claim 1 wherein the net is contacted with the aqueous suspension by pouring the aqueous suspension over the net.
Claim 6
Dependent Claim
41 words
The process as claimed in claim 1, 2, 3 or 4 wherein a plastics film is extruded, stretched and fibrillated, and expanded to form said net reinforcing material whereafter said resulting net reinforcing material is directly contacted with the aqueous suspension.
Claim 7
Dependent Claim
25 words
The process as claimed in claim 1 wherein the excess water in step (b) is removed by applying a partial vacuum to the thin 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) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |