Method of manufacturing sheets based on hydraulic binder,...

B - Operations – Transporting – 28 – B

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B28B 19/00 (2006.01) B26D 5/34 (2006.01) B28B 11/08 (2006.01) B28B 11/14 (2006.01) B28B 11/16 (2006.01)

Patent

CA 2476497

The invention relates to a method of manufacturing sheets based on hydraulic binder, particularly sheets of plasterboard with feathered edges. This method comprises the steps of: 1) making a mark (301) on a facing (2 or 3) of the preform (5); 2) detecting the mark (301); and 3) sending an actuating signal to a device (9) for cutting the preform (5). The invention also relate to a production line for producing such sheets, and to an apparatus, particularly for making an impression (12, 12bis) in a preform (5). This apparatus comprises: - a frame (101); - first (102, 103) and second (105, 106) pulleys; - two belts (108, 109) wrapped around the pulleys (102, 103, 105, 106); - at least one wire (111) extending between these belts (108, 109) so that its axis is parallel to the axis of the pulleys (102, 103, 105, 106).

L'invention concerne un procédé de fabrication de plaques à base de liant hydraulique, en particulier, de plaques de plâtre à bords amincis. Ce procédé comprend les étapes de : 19 réalisation d'une marque (301) sur un parement (2 ou 3) de la préforme (5) ; 2) détection de la marque (301) ; et 3) envoi d'un signal d'actionnement à un dispositif de coupe (9) de la préforme (5). L'invention concerne également une ligne de production de telles plaques, ainsi qu'un appareil, notamment, pour la réalisation d'une empreinte (12, 12bis) dans une préforme (5). Cet appareil comprend : - un bâti (101) ; - des premières (102, 103) et secondes poulies (105, 106) ; - deux courroies (108, 109) entourant les poulies (102, 103, 105, 106), - au moins un fil (111) s'étendant entre ces courroies (108, 109), de telle sorte que son axe soit parallèle à l'axe des poulies (102, 103, 105, 106).

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