Patent DE-19924214-A1 (DE)
Title: Jacquard loom for weaving double pile layers
Inventor: DEBAES JOHNNY
IPC: D03D27/10
Filed: 1999-05-27
Abstract: The loom, for weaving a double layer with pile yarns between them, has a ratio (H/h) between the intermediate gaps (H1,H2) between two warp settings on one side, and the applied stroke movement height (h) for the third shed forming mechanism (16,17), which is larger than for the first two shed forming mechanisms (14,15). The three shed forming mechanisms (14-17) work with a lifter system (18,19) operated by the same drive. The ratio (H2/h) for the third shed forming mechanism (16,17) is close to 1.5 times the ratio (H1/h) for the first two shed forming mechanisms (14,15) which is close to 1. The three shed forming mechanisms (14-17) have a griffe system, with at least one pair of griffes (18,19) moving up and down, working together in a counter phase. The wefts are inserted by two weft insertion systems (1,2), on upper and lower weft insertion paths. The first (14) and/or second (15) shed mechanisms move the warps (3-6) appropriately at the weft insertion paths. The third shed forming mechanism (16,17) is a three-position pulley system of a Jacquard machine, while the first two shed forming mechanisms are two-position pulley systems (14,15) of the same Jacquard loom. The third shed forming mechanism, in two sections (16,17), has two pulleys (20,21;30,31) with at least one roller moved up and down by the same lifter (22,23;32,33).  Deflection rollers (24,25;34) are at a fixed height.  A third pulley (26;35) has two rollers.  An initial pulley cord (27) at the first section (16) is linked to the pulleys (20,21), and passes between them in succession over the first deflector (24), a roller of the first pulley (20), a roller of the third pulley (26), a roller of the second pulley (21) and the second deflector (25).  An initial pulley cord (36) of the second section (17) is linked to the Jacquard loom frame at two points (37,38) and between them, in succession, passes over a roller of the first pulley (30), the first roller of the third pulley (35) and a roller of the second pulley (31). A second pulley cord (28) of the first section (16) is linked to the Jacquard loom frame and from the anchor point (29) passes over the second roller of the third pulley (26) to carry one or more warps (7-12).  The second pulley cord (39) of the second section (17) is linked to the third pulley (35) to pass from its anchor point (39') in succession round the deflector (34) and the second roller of the third pulley (35) to take one or more warps. The first (14) and/or second (15) shed forming mechanism has a pulley (40) with at least one roller moved up and down by the same lifter (41,42).  A pulley cord (43), linked to the Jacquard loom frame, leads from the anchor point (44) over a roller of the pulley (40) to take one or more warps. Each pulley cord (28,36,43) anchor point (29,37,38,44) has a height adjustment. The weft insertion system has a selection facility, to give a number of different wefts to be used. An Independent claim is included for a weaving process where the ratio of the intermediate gaps (H1,H2) between two warp settings on one side and the lifting height (h) through the lifters (18,19) is larger for the pile warps (7-12) than for the ground warps (3-6).  Preferred Features: The ground warps (3-6) are placed in a position where the wefts can be inserted (1,2), such as under the weft movement paths. The loom uses wefts of different colors.