Lafarge Platres

Siniat

Jean Paul Solomut

Michel Rigaudon

Paul Jallon

Jean Louis Laurent

Jean-Louis Laurent

The invention relates to a method of manufacturing sheets based on hydraulic binder, particularly sheets of plasterboard with feathered edges. The method comprises the steps of (I) making a mark () on a facing (or) of the preform (), (II) detecting the mark (), and (III) sending an actuating signal to a device () for cutting the preform (). The invention also relates to a production line for producing such sheets, and to an apparatus, particularly for making an impression () in a preform (). The apparatus comprises a frame (), first () and second () pulleys, two belts () wrapped around the pulleys (), and at least one wire () extending between these belts () so that its axis is parallel to the axis of the pulleys ().

Method of manufacturing sheets based on hydraulic binder, production line for producing such sheets and apparatus for making an impression

A production line for producing sheets based on hydraulic binder, the production line including in an upstream zone of the production line, marking device for marking a facing material of the preform with a mark; in a downstream zone of the production line, detecting device for detecting the mark made by the marking device; a cutting device; and an actuating device for actuating said cutting device after receiving a detection signal from the detection device.

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Izon, France

Jean Paul Solomut