Abstract: A thread stretching device for a weaving machine, especially an air jet weaving machine, includes a thread gripper (22) for gripping the weft thread (10) as a device for stretching a weft thread inserted into a shed. A mechanism (23) for deflecting the weft thread is arranged upstream of the thread gripper, relative to the weft thread transport direction.

Abstract: Weaving machine, method and selvedge forming apparatus for introducing into a shed an end (30A) of a weft thread (30) which has been inserted into a shed, the selvedge forming apparatus (4, 5, 6) being provided with a device (20) for introducing the end of the inserted weft thread into a subsequent shed, wherein the selvedge forming apparatus (4, 5, 6) comprises a blowing device (50) having at least one blowing opening (51) which, in use, can be positioned at the level of the plane of a selvedge (16, 17) of the woven fabric (2, 3), with the blowing device (50), in use, blowing essentially toward the beat-up line (36).

Abstract: A device for inserting of weft threads in an air jet weaving machine comprising at least one set of main nozzles (13, 14) which are mounted in series, to which each time a regulating valve (21, 22) is assigned, is provided with a control and regulating unit (17) which defines the settings of the regulating valves (21, 22) of a set of main nozzles (13, 14) with respect to one another, in order to form an overall value for the intensity of the impulse transmission of the set of main nozzles.

Abstract: The invention relates to a heald frame comprising at least one frame part (10, 14nd at least one heald carrying rod (16). A multitude of projections (25, 26), which are arranged one behind the other while being situated essentially in a row, are formed from the heald carrying rod (16) while projecting therefrom by means of plastic deformation and are held inside a recess (28) or the like of the frame part (10,14).

Abstract: Blowing nozzle for supporting a weft thread in a weaving machine, provided with a flow-through canalisation (17) for a fluid tracing a bend (20) near the free end of the blowing nozzle (3) to subsequently flow into the environment via at least one outlet opening (18), wherein a jet pipe (21) is formed in this flow-through canalisation (17), and the jet pipe (21) is integrated in the bend (20).

Abstract: A loom having a first drive motor (10), which for instance drives a batten (13), and having at least one second drive motor (44), which drives a dobby (46), is provided with a control and regulating device (48), which forms a rotational angle course for a virtual synchronization shaft of the loom and communicates such rotational angle course to respective control and regulating units (49, 51) of each of the drive motors (10, 44), which synchronize the drive motors in at least one angular position relative to the virtual synchronization shaft.

Abstract: Method for optimizing a textile production process, which consists in manufacturing a fabric (11) on a weaving machine (1), characterized in that characteristics of the fabric (11) and/or fabric-determining elements are visualized on a machine screen by means of at least one image.

Abstract: Apparatus monitoring and/or adjusting tensile force in a yarn (10) including at least three consecutive yarn deflecting elements (11, 12, 13) of which the central deflecting element (12) is displaceably held by a retention device (14) that is supported in such a way that the motion and/or position of the deflecting element (12) is substantially a function only of the tensile force F1 in one yarn segment, such segment being situated between the displaceable deflecting element (12) and only one of the two neighboring deflecting elements (11 or 13).

Abstract: A drive system for a machine, in particular a weaving machine, is designed in a manner such that controlled electric power is applied to a rotary electric drive motor (2) as a function of particular angular positions of the motor and such that electrical energy applied to the motor is reduced or interrupted during phases of increasing angular speed of the motor. Phases of increasing angular speed are detected by the drive system to determine phases of increasing angular speed. A method for controlling an electrical motor drive system using a switchable reluctance motor to reduce or interrupt electrical energy supplied to the motor based on motor speed increases as a function of motor angular position is also disclosed.

Abstract: A thread clamp for a weaving machine includes a clamp having at least two clamping parts between which a thread may be clamped and an actuator arranged to move the clamping parts between clamping and unclamped positions. The actuator is arranged to operate the clamp so that it moves at least in one direction by a negative fluid pressure. The actuator may be formed as a small piston that may be actuated both by positive pressure and negative pressure to move the clamp between clamping and unclamped positions.

Abstract: A device for inserting weft threads in an airjet weaving machine including at least one main blower and a respective thread clamp associated with the main blower. The thread clamp is constituted of an element configured in a modular form. Such modular form enables several such elements to be assembled in a modular configuration, including one on top of another. Pneumatically actuated elements are used to engage and disengage the thread clamps whereby the thread clamps may be engaged or disengaged by pressure and vacuum supplied through a single supply conduit. A method for inserting weft threads in the shed of an airjet weaving machine includes holding each weft thread at least temporarily in a thread clamp that moves with the sley of the weaving machine and using a thread tensioner outside the shed at a location between the thread supply and the thread clamp.

Abstract: A thread section of a weft thread is held precisely ready for a receiving rapier in a feed rapier on a rapier loom despite the effects of retarding forces. Deflections of the thread section by the head of a receiving gripper are compensated for, whereby the feed rapier is provided with a thread clamp on the side facing the feed device for the weft thread, which releases on tension forces occurring in the thread section and permits a deflection of the thread section.

Abstract: A receiving gripper for a rapier loom, wherein at least the moving part is made of a ceramic material.

Abstract: A method to adjust weaving parameters of weaving machines when changing the weaving rate based on optimized weaving-parameter values, one or more altering functions being used to determine and adjust weaving-parameter values which match the changed weaving rate.

Abstract: A drive system powering a group of machines each fitted with a rectifying unit, wherein the inputs of the control devices of the machines' drive motors are interconnected by an electrical bus which implements a power exchange. The system enables swapping current from a power supply between motors of different machines.

Abstract: A stop element (24) is used to open a gripper clamp (20) of a weaving machine (3) and is associated to the gripper clamp's stop piece (21) and the stop element during the slow mode operation of the weaving machine is transversely moved into the path of the gripper clamp's stop piece (21) after the clamp already has moved into the vicinity of the stop element (24).

Abstract: A heald frame for a weaving machine includes stops (15, 16) made of a material with shock-absorbing properties associated with the ends of the healds (10). A gap is provided between the heald ends and the stops, such gap ensuring that the healds can be moved along guide rails forming part of the heald frame while reducing noise and potentially damaging vibrations. The healds are held on the guide rails with play and are moved by and limited in their movements in a longitudinal direction by the stops.

Abstract: Apparatus for producing a leno fabric includes a plurality of juxtaposed stationary needles (1) each fitted with one guide eye for a single warp and in addition a device (13) fitted with a plurality of juxtaposed warp guide eyes, the device (13) being displaceable relative to the stationary needles (1) along the needles' longitudinal direction and transversely thereof. The guide-eyes fitted device (13) is guided during longitudinal displacements along the longitudinal direction of the needles and along respective transverse displacements by guides (18).

Abstract: In order to deflect a warp thread sheet (2) in a weaving machine, a deflecting device (18)is provided which is guided in guides (26) that also guide heald frames (13, 14, 15, 16). The deflecting device positions a segment (46) of the warp thread sheet (2) that starts at a beatup line (7) of the fabric (8) between the beatup line and the heald frames.

Abstract: A weaving machine gripper housing, includes edges made of a sheetmetal forming the housing and includes edge yarn guide elements at the edges which have a thickness larger than the adjacent sheetmetal thickness. The thicker edge guide elements protect yarn engaging the edges during gripper use.