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AssigneeLafarge Platres
InventorsPaul Jallon, Jean-Louis Laurent, Frederic Peronnet, Roger Arese, Lionel Zbinden, Emmanuel Vial, Loic Martin
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The subject of the invention is a novel plasterboard and its manufacturing processes. The novel board comprises, on one side, two first parallel feathered edges and, on the other side, two other, second, parallel feathered edges that are perpendicular to the first ones; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said other parallel feathered edges having a width of between 100 and 200 mm; or, on one side, two first parallel feathered edges and, either on the same side or on the other side, two second parallel feathered edges that are perpendicular to the first ones, the said second parallel feathered edges having a width such that the ratio of the width of the said second parallel feathered edges to the width of the said first parallel feathered edges is between 1.5 and 5.
A production line for producing hydraulic-binder-based boards from a preform comprising a facing material covered with a hydraulic binder composition and supported by a conveyor belt, comprising at least two forming tapes fitted with longitudinal tapes, the line further including a device that produces an impression in the preform before the first forming tape, the impression being produced in an upper part of the preform,
A production line for producing hydraulic-binder-based boards from a preform comprising a facing material covered with a hydraulic binder composition and supported by a conveyor belt, comprising at least two forming belts fitted with longitudinal tapes, the line further including a device for making an impression in the preform before the first forming belt, and a device for introducing, under the preform between two forming belts, a lath opposite the point or at the point where the impression has been made.
Dependencies are inferred from the claim text.