Patent FR-2777916-A1 (FR)
Title: Assembly to turn over and glue the edge of a woven carpet
Inventor: DESLOOVERE RONNY
IPC: D06C25/00
Filed: 1999-04-23
Abstract: The apparatus to glue the edge (1) of a woven carpet has a glue application head (8) to deliver the glue to the ends for bonding at the carpet edge (1). After the glue has been applied, a system (10) moves and compresses the glued edge against the back of the carpet while moving the carpet edge through the gluing station (8). The moving edge grip (6), to grip the edge, is synchronized with the transport and compression system (10). A unit (7) turns the glued edge (1). The edge turning unit (7) is between the grip (6) and the transport/compression system (10). A limit (20) for the upright yarns is in front of the grip (6), aligned on the direction of movement, for the carpet to slide with the upright yarns aligned to the back. The grip (6) and the transport/compression system (10) are mounted to a table (4), with the limit (20) formed by sections (19) of the table (4) edge at different levels for their upper sides. The table (4) has an additional continuous conveyor belt (15) powered by a drive motor (17), which is synchronized with the transport/compression system (10) for the carpet to be moved at the same linear speed. The moving grip (6) is formed by two continuous belts (21A), facing each other, with a movement which is synchronized with the transport compression system (10) for movement at the same linear speed to shift the carpet. The upper belt (21A) is supported by a frame (28) to hold it in a linkage over the lower belt. A further continuous belt (32) is at the edge folder (7), at a frame over the table (4) linked to the frame for the upper grip belt (21A), with the same drive (22). The edge folder (7) has a spiral guide (51) and a tine at the end of the folder aligned towards the transport/compression system (10). The edge folder (7) can have a guide with at least a part aligned upwards and to the rear to give a preliminary fold to the carpet edge (1), followed by a second guide to complete the edge fold. The leading guide extends to the side of a limit, where the carpet edge (1) is pressed against it during the first fold.  The second guide has a limit to support the carpet edge (1) during the final fold. The second guide has a grooved wheel to grip the edge fold, against the limit under the second guide. The grooved wheel rotates on a horizontal arm, attached to an aligned shaft which is rotated by the folder (7) mechanism, with a second arm fitted to the rotating shaft and linked to the piston rod of a pneumatic cylinder. The edge folder (7) has a cylinder and a pedestal with height movement through the cylinder, over the glue applicator head (8). The glue applicator head (8) is aligned towards the spiral guide (51), and behind it in the direction of movement, to open at the side of the tine with at least one spray opening. An elastic unit is at the side of the spiral guide (51) to hold the carpet at the edge (1) to be folded. A control unit (49), linked to sensors which register the carpet position, operates the shaft rotation, the displacement of the grooved wheel, and the cylinder which sets the pedestal height. The edge folder (7) is mounted to a slide (11), for lateral movement in relation to the direction of carpet travel through the displacement unit (12). A sensor (13) registers the presence of the upright yarns along the carpet edge (1) to be glued, and controls the displacement unit (12) through the control unit (49) to shift the slide (11) according to the monitored positions. The sensor is a probe, with a plate (37) held by linked arms at a support, with an encoder at one of the linked arms for the control unit (49). The control unit (49) delivers a delayed command signal to the slide (11) holding the edge folder (7), according to the sensor signals. The transport/compression system (10) has two continuous conveyor belts (57), over each other, with deflection rollers (58) and a drive motor (59).