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US 4,059,660 AGranted
Method of molding a light-weight panel
AssigneeRoth Freres, S.A.
InventorsJacques Roth, Michel Roth, Paul Seiler, Roger Lavenir, Alain Manigold
Life of this patent
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Abstract
The disclosure is of a moulded light-weight panel and its manufacture, the panel comprising sheets of foamed material and cardboard, which may be corrugated, impregnated with a solution of elastomer which becomes polymerized to bond all the components of the panel together in a mould. Reinforcing and fastening elements may be incorporated in the panel.
Claims7
A method of manufacturing a moulded panel, characterised in that it comprises the steps of:
- i. wetting one of the surfaces of a sheet of cardboard with a solution of polymerisable urethane elastomer,
- ii. wetting one of the surfaces of a sheet of cured polyurethane foam with a solution of polymerisable urethane elastomer,
- iii. placing the non-wetted surface of the sheet of foam upon the wetted surface of the sheet of cardboard,
- iv. placing a finishing cover material upon the wetted surface of the foam,
- v. turning over the sandwich thus formed and then wetting the virgin surface of the sheet of cardboard with more of said solution,
- vi. disposing upon this last-mentioned surface after thus wetting it at least one strip or layer of cured polyurethane foam,
- vii. placing the resulting assemblage into a mould for shaping the assemblage into a panel of the desired form, and
- viii. polymerising said urethane elastomer at least far enough to ensure that the panel will retain the said desired form and then removing the panel from the mould.
5 more elements
Dependencies are inferred from the claim text.