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.

Abstract: The invention relates to method and apparatus for controlling the powering of electric drive motors (8) of a group of at least two machines (2, 3, 4), the motors operating in periodic motions, wherein the periodic motions are mutually coordinated in a manner so as to control a parameter which is representative of the operations of the machines. Parameters may include one or more of the sum of the electric power applied to the drive motors, the magnitude of the noise level generated by the machines and machine-caused vibrations. The drive motors of one machine may be controlled as a function of the periodic motion of the drive motor of the other machine, and power applied to one drive motor may be applied as a function of a mutually related drive motion of the machines.

Abstract: The invention relates to a receiving gripper for a rapier weaving machine, the gripper being fitted at one end with a clamping hook (12) including a clamping surface, the hook being paired with a mating clamp face of a head (15) of a pivotably supported, two-arm lever (14), wherein both the end face of the head (15) and the clamping hook (12) are fitted with guide elements (18, 19) guiding the lever head in the circumferential direction relative to a pivot pin for the lever.

Abstract: A weaving machine, in particular an airjet loom, which is fitted with a system (16) for cutting a filling thread (12?), which is being held ready for filling insertion, from a filling (12) already beaten into a fabric (10), wherein the system (16) includes a laser.

Abstract: A selvage bracket (15) including a rotatable insert (33) is used in a weaving machine selvage insertion device (1), the insert is connected to at least one source of compressed air and includes at least one blowing aperture (37). The direction of blowing of the aperture is adjustable by changing the position of the insert relative to the holder.

Abstract: A heald frame for a weaving machine includes a stop (15, 16) made of a material with shock-absorbing properties associated with at least one end of the healds (10). A gap is provided between the hold ends and the stop, such gap ensuring that the healds can be moved along guiding and drive rails forming part of the heald frame while reducing noise and potentially damaging vibrations.

Abstract: A weaving machine, in particular an airjet loom, which is fitted with a system (16) for cutting a filling thread (12′), which is being held ready for filling insertion, from a filling (12) already beaten into a fabric (10), wherein said system (16) includes a laser.

Abstract: A machine includes an electric drive motor and at least one component carrying out a periodic motion. The machine is configured to control the drive motor in such a manner that it applies a predetermined torque to the machine.