BACK RAIL MECHANISM FOR WEAVING LOOMS

• Main Authors: ROTREKL,OTTO,CS, HENZL,JINDRICH,CS, VASICEK,VLADIMIR,CS
• Format: Patent
• Language: English
• Published: 29.06.1979
• Edition: 2
• Subjects: LOOMS; METHODS OF WEAVING; TEXTILES; WEAVING; WOVEN FABRICS

There is disclosed a back rest mechanism for a loom. In a first disclosed embodiment a back rest roller is rotatably mounted on the outer ends of parallel arms or levers, mounted for oscillation about their inner ends, which are connected for joint movement by a hollow back rest shaft. Deflection of the back rest roller by the warp passing from the warp package on the warp beam to the shed of the loom is resiliently opposed by one or more torque rods extending between and connected to a central portion of the back rest shaft and a fixed part or structure, such as the frame, of the loom. Means is provided for adjusting the basic torque to which the torsion bar or bars are subjected under a predetermined set of operating parameters of the loom. In a second disclosed embodiment the hollow back rest shaft is fixed against rotation about its axis, the laterally inner ends of two aligned torque rods are secured to the hollow back rest shaft intermediate its length, and the radially inner ends of the parallel arms or lenses are secured to the laterally outer ends of the respective torque rods.