Abstract: A loom gripper band driving device includes apparatus for changing the path of motion of the gripper band. The drive device includes a band driving wheel connected to a gear that engages a gear segment pivotable about a fixed support shaft and that is connected by a coupling rod to a crank arm that pivots about a fixed crankarm supporting shaft. The coupling rod is connected at its opposite ends to the gear segment and the crankarm, respectively, with the connecting points between the coupling rod, gear segment and crankarm being variable to change the path of motion of the gear segment and the gripper drive relative to the crankarm and in particular the crankarm supporting shaft.

Abstract: A power loom selvage forming device includes at least two thread guide elements for guiding selvage threads. The thread guide elements are guided in longitudinal guides and are connected by transmission elements to a drive shaft driven by a drive motor. The axis of the drive shaft is perpendicular to the direction of motion of the thread guide elements, with the transmission element converting the rotations of the drive motor into longitudinal motions of the thread guide elements containing at least one element mounted on the drive shaft and including articulation points eccentric to the drive shaft and at a mutual angular separation. The drive motor is rotatable by a control into predetermined angular positions at predetermined times.

Abstract: A weaving machine having mutually separable major assemblies wherein the region between a back rest (7) preferably together with a warp beam (4) associated with one machine assembly (2) and means (9) for removing the fabric (12) and associated with the other assembly (1) is covered by an upper shield and/or a lower shield. The shields are composed of sets of mutually complementing cover pairs (23, 24; 27, 28), with each cover mounted to one of the assemblies.

Abstract: A gear (1) for driving a rapier of a loom and composed of a separately manufactured synthetic base body (3, 5) to which a wear-resistant band (9) forming the outside teeth (2) of the gear is bonded by an adhesive (10).

Abstract: A method for advancing and drawing in new warp threads connected by knots to existing warp threads in a weaving machine wherein the warp threads are advanced through apertured elements such as heddles of shed-forming devices or a warp stop motion wherein the warp threads are advanced to the apertures at an angle of less than 90.degree.. Apparatus for achieving the method includes supporting arrangements for heddles and warp stop motion elements, including an arrangement to vary the angle of approach to warp stop motion elements by the warp threads.

Abstract: A loom drive comprising a drive motor (1) connected by a gear unit to first driven components (20) and to second driven components (23), a switching gear (15) being mounted inside the gear unit and being displaceable into different switch positions in such manner that in one switch position the main drive motor (1) drives the first and second driven components (20, 23) and that in another switch position the drive connection to the first or second driven components (20, 23) is interrupted.

Abstract: A method and apparatus for removing waste selvages (11) formed when weaving fabric on a loom includes a pair of selvage removal rollers (19, 23) fitted with friction coverings and driven against one another to form a gripping nip for engaging and drawing the waste selvage away from the woven fabric, whereby the waste selvage is first fed to the peripheral surface of the first one of the pair of removal rollers (19) over a wrapping angle larger than 150.degree. and preferably larger than 180.degree., before reaching the clamping nip between the rollers (19,23). Alternate embodiments of the invention are described.

Abstract: A feed mechanism for several weft yarns, each with its own feed device capable of selecting the weft yarn to be inserted, includes sensors for monitoring the weft yarns for quality defects and for, upon detection a defect in a weft yarn, precluding the weft yarn from being selected for insertion until the portion of the weft yarn with the defect has been shunted into a region from where it can no longer be woven into the fabric.

Abstract: A weft brake for an airjet loom includes a controlled drive for causing at least one thread guide to deflect the weft and thereby brake it, and a transmission which permits relative motion between the drive and the thread guide. The transmission is placed between the controlled drive and the thread guide to permit relative motion between the drive and the thread guide. As a result, rapid drive motion will not directly cause a rapid thread guide motion, resulting in a reduction in tension spikes during braking. Because the motion of the thread guide depends on the weft tension, when the weft tension is high, the amount of the deflection and consequent braking is less and the increase in weft tension caused by the braking is in turn limited. Moreover, even in the event of slackening of the weft tension, the weft still is kept tension. The drive may be in the form of a rotary drive and the transmission may be in the form of a helical spring.

Abstract: A device for affixing a shaft drive element to a loom warp beam shaft includes a clamping element having teeth, teeth at one end of the drive shaft and teeth on the drive element, and a displacement mechanism for sliding the clamping element and drive element on the drive shaft such that the clamping element teeth and the drive element teeth engage the drive shaft teeth. Upon sliding the drive and clamping elements over the drive shaft, the clamping and drive element teeth and the shaft teeth are mutually rotated to cause oppositely facing flanks on the drive and clamping element teeth to be pressed against corresponding flanks on the drive shaft teeth and thereby prevent relative rotation.

Abstract: A weft insertion system for an air-jet loom includes at least one main blower nozzle and a compressed air supply for the main blower nozzle, the compressed air supply including stationary components and components which move together with the main blowing nozzle, the stationary and movable components being connected by a compressed-air conduit which extends between an outlet of one of the stationary components to an intake of one of the movable components. The stationary components are mounted in such a manner that the outlet of the stationary components is located above the intake of the components which move together with the main blower nozzle and, furthermore, is mounted approximately centrally with respect to the end positions of the movement of the moving components.

Abstract: A gripper loom includes guides mounted laterally outside the shed and guides displaceable into and out of said shed. Both guides engage guide surfaces of a rapier to guide the rapier, but the set of guide surfaces engaged by the guides mounted laterally outside the shed and the set of guide surfaces engaged by the guides displaceable into and out of the shed are located at different sites on the rapier.

Abstract: In an apparatus for selecting and feeding wefts to an insertion device of a weaving machine, the feeders are directly connected to eccentric drives which have an excursion corresponding at least to the paths covered by the feeders between their rest and feed positions, and each feeder is associated with a guide and arranged to compensate for transverse displacements of the eccentric drives which deviate from the reciprocating motions of the feeders. The feeders have an excursion corresponding to at least the distance between the rest and feed positions of the feeder, with each feeder together with a drive motor, the eccentric drive, and the guide forming a module to simplify matching of yarn feeders to the requirements of a specific fabric and exchange of units in case of a defect. Advantageously, the modules of neighboring feeders may be mounted in mirror-symmetric manner relative to a common plane in which all of the feeders are mounted.

Abstract: A control system for adjusting and/or checking the operational parameters of a weaving machine includes a control unit with a monitor, the control unit including an image memory for storing images of the site and/or type of thread breaks. The images are displayable on the monitor when a thread break occurs, and are associated by the control unit with selection keys which, when actuated, allow data concerning the site and/or the kind of thread break that occurred to be fed into the control unit.

Abstract: A device for forming a shed in weaving machines includes a harness and coupling elements for coupling the harness to a drive mechanism. The height of the harnesses is made adjustable by mounting respective coupling elements on setting screws integrated into the side beams of the harness elements and movable relative to the side beams for enabling individual height adjustment of each harness element relative to its coupling element. Because the height adjustment is done on the harness itself, the height adjustment can be done when the harness is inside as well as outside the weaving machine. The setting screws extend through the side beams to the coupling elements, which are situated below the harness, adjustment being effected by turning the screws from the top of the side beams to move of the harness up and down relative to the ends of the setting screws and coupling elements coupled thereto at the bottom of the side beams.

Abstract: A loom having an optical weft detector which includes a light emitter and a light detector for picking up light reflected by a weft thread in a guide duct formed by blades of the reed, is mounted on the side of the reed which faces away from the guide duct and outside the blades, the detection zone of the light detector being spatially limited to the light reflected by the weft thread in the guide duct.

Abstract: A split loom includes securing elements which can be affixed to a removable loom part to receive the harnesses before separating the removable loom part from a stationary loom part, thereby retaining the harnesses in predetermined positions until re-assembly of the removable loom part to the stationary loom part.

Abstract: A two-part weaving machine includes lamellar side parts in both portions of the machine frame. The side parts are fitted with mutually associated, essentially horizontal rest surfaces and with mutually associated, essentially vertical stop surfaces. In addition, a tightening system containing tightening wedges is provided for each machine side to press the stop surfaces of the side parts against each other.