Patent US3581631A successfully refreshed from Google Patents.
US3581631A
Expired / Lapsed
US
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Manufacture of film reinforced bituminous structures
Assignee: Akzona Inc
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Filing: 1969-05-13
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Granted: 1971-06-01
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Expires: 1989-05-13
Abstract
Abstract A process for the manufacture of a film reinforced bituminous structure including at least one bitumen-containing layer which comprises the steps of applying a polymeric adhesive film containing synthetic threads and thereafter applying a molten layer of bitumen-containing material to the film so that the adhesive will soften and promote adhesion between the two layers of material and the synthetic threads. The film is formed of a plurality of synthetic reinforcing threads, e.g. a fabric of polyester threads, having spaces therebetween filled with the polymeric adhesive, e.g. montan resin. A process and an apparatus for forming the thread containing film are also disclosed.
Inventors
- 👤 Sigbert Samson
- 👤 Jacobus P Van Der Ploeg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:56
CPC Classifications
B; B32; B32B; B32B27/00; D; D06; D06N; D06N5/00; E; E01; E01C; E01C11/00; E01C11/16; E01C11/165; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/153; Y10T442/172; Y10T442/181
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
17 words
The process of claim 1 in which the adhesive used to form said film comprises montan resin.
Claim 2
Dependent Claim
17 words
The process of claim 1 in which the adhesive used to form said film comprises tall resin.
Claim 3
Dependent Claim
16 words
The process of claim 1 in which the adhesive used to form said film comprises rosin.
Claim 4
Dependent Claim
45 words
The process of claim 1 in which use is made of a film containing an adhesive which comprises a synthetic polymer having a softening point hIgher than 50* C., which, when in a softened condition, wets the synthetic threads and which is miscible with bitumen.
Claim 5
Dependent Claim
18 words
The process of claim 1 in which the adhesive used to form said film contains a softening agent.
Claim 6
Dependent Claim
23 words
The process of claim 6 in which the softening agent comprises from about 5 to about 20 percent by weight of the film.
Claim 7
Dependent Claim
18 words
The process of claim 6 in which the softening agent comprises a copolymer of vinyl acetate and ethylene.
Claim 8
Dependent Claim
16 words
The process of claim 1 in which the reinforcing threads are formed of drawn polyester threads.
Claim 9
Dependent Claim
33 words
The process of claim 1 in which said synthetic reinforcing threads are crossing threads of a fabric, the surface area of the meshes between the crossing threads being at least approximately 5 mm.2.
Claim 10
Dependent Claim
38 words
The process of claim 1 in which said layer of material comprises a sublayer of a sand bed, said reinforced film is directly applied to said sublayer, and one or more bitumen layers are applied to said film.
Claim 11
Dependent Claim
16 words
The process of claim 1 in which the film is applied between two successive bitumen-containing layers.
Claim 12
Independent Claim
96 words
An apparatus for forming a thread-containing polymeric film, which comprises lower and upper driven endless belts, means for supplying a sheet of synthetic threads between said belts, means for applying molten adhesive to said sheet, and heating and cooling means, which extend one after the other in the direction of travel of the belts, for successively heating the adhesive-covered sheet to insure that the spaces between the threads are filled with the adhesive, and then cooling the adhesive-covered sheet to form a continuous thread-containing film, and means for withdrawing the cooled film from between said belts.
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |