US3977931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and machine for the continuous manufacture of panels
Assignee: Societe de Participations Etudes et Realisations SPER
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Filing: 1974-08-22
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Granted: 1976-08-31
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Expires: 1994-08-22
Abstract
Abstract The invention relates to a method for the continuous manufacture of panels of synthetic material with at least one surface covered with a rigid facing by means of a machine comprising: devices for the continuous advance of the facings; a distributing station to deposit, on a lower facing, in liquid form, expandable synthetic material which will constitute the inner layer of the panel; and continuous conveyor means, arranged above and below the plane of advance of the panels. This method comprises the steps of: Applying, on to the synthetic material in the liquid state, at the outlet of the distributing depositor, a sheet facing of non-woven material, relatively porous, gradually traversable by said synthetic material, Subjecting said material thus covered to a gauging operation before the non-woven material is traversed by this material in the course of expansion, And, after the gauging on to the non-woven material which has become adhesive by the traversal of the synthetic material and then presenting itself in the jell state, applying the rigid facing in plate form, by means of continuous conveyor means.
Inventors
- 👤 Jean-Marie Peille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:29
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/245; B29; B29C; B29C44/00; B29C44/20; B29C44/30; B32B5/02; B32B5/022; B32B5/18; B32B5/20; B32B7/00; B32B7/04; B32B7/12; B29L; B29L2007/00; B29L2009/00; Y; Y10; Y10S; Y10S425/00; Y10S425/119; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/249921; Y10T428/249953
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
193 words
A process for the continuous production of panels having a core of expandable synthetic material distributed in the form of a reactive liquid passing into a gel-like state and then into a solid state, a lower facing, an upper facing, at least one of said facings being formed of a rigid material compatible for adhering on contact with the synthetic material during the gel-like state, said process comprising the steps of: placing on said lower facing said expandable synthetic material in liquid form; applying to the top of said synthetic material during its liquid state a sheet of non-woven material, relatively porous, which can be progressively transversed by said synthetic material; submitting said synthetic material during its liquid state and said sheet of non-woven material to a gauging operation before said non-woven material is traversed by said synthetic material; permitting said synthetic material to freely expand thereby progressively traversing said synthetic material after said gauging step until said synthetic material changes into a gel-like state and said non-woven material has become sticky due to the transversal of said material; and applying to said non-woven material after it has become sticky said upper facing.
Claim 2
Dependent Claim
193 words
A process for the continuous production of panels having a core of expandable synthetic material distributed in the form of a reactive liquid passing into a gel-like state and then into a solid state, a lower facing, an upper facing, at least one of said facings being formed of a rigid material compatible for adhering on contact with the synthetic material during the gel-like state, said process comprising the steps of: placing on said lower facing said expandable synthetic material in liquid form; applying to the top of said synthetic material during its liquid state a sheet of non-woven material, relatively porous, which can be progressively transversed by said synthetic material; submitting said synthetic material during its liquid state and said sheet of non-woven material to a gauging operation before said non-woven material is traversed by said synthetic material; permitting said synthetic material to freely expand thereby progressively traversing said synthetic material after said gauging step until said synthetic material changes into a gel-like state and said non-woven material has become sticky due to the transversal of said material; and applying to said non-woven material after it has become sticky said upper facing.
Claim 3
Dependent Claim
55 words
A process in accordance with claim 1, further comprising the steps of: applying a continuous sheet to both the underside of said lower facing of a plurality of said panels and to the lateral sides of said panels thereby providing a protective covering for said lower facing and lateral sides of said plurality of panels.
Claim 4
Dependent Claim
128 words
A machine for the continuous manufacture of panels comprising: means for continually advancing an upper and a lower rigid facing through said machine; means for disposing in liquid form an expandable synthetic material onto said lower facing; first shaper means for applying a sheet of porous, non-woven material to said synthetic material so deposited on said lower facing during its liquid state and for gauging said material; means for permitting progressive impregnation of said non-woven material by said synthetic material during its gel-like state as said upper and lower facings are drawn through said machine over a predetermined distance; and means for restraining the expansion of said synthetic material after said upper and lower facings have passed through said means for permitting progressive impregnation of said non-woven material.
Claim 5
Dependent Claim
128 words
A machine for the continuous manufacture of panels comprising: means for continually advancing an upper and a lower rigid facing through said machine; means for disposing in liquid form an expandable synthetic material onto said lower facing; first shaper means for applying a sheet of porous, non-woven material to said synthetic material so deposited on said lower facing during its liquid state and for gauging said material; means for permitting progressive impregnation of said non-woven material by said synthetic material during its gel-like state as said upper and lower facings are drawn through said machine over a predetermined distance; and means for restraining the expansion of said synthetic material after said upper and lower facings have passed through said means for permitting progressive impregnation of said non-woven material.
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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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |