53results about "Selvedge shedding mechanism" patented technology

A leno cloth is prepared, which comprises at least ground warp threads 1, leno warp threads 3 and weft threads 2, and in which the weft threads 2 and the ground warp threads 1 are arranged essentially interspace free. The weft threads are bound-off by means of the leno warp threads 3, which comprise a clearly lower titer relative to the ground warp threads 1, with such a lower tension relative to the ground warp threads, so that the crossings of the leno warp threads 3 with the ground warp threads 1 that are present due to the binding are arranged in a plane parallel to the plane of the maximum thickness of the weft threads. The leno warp threads 3 comprise a higher working-in or take-up into the woven cloth than the ground warp threads 1. According to a further aspect of the invention, a method for the production of a leno cloth as well as a loom for the carrying out of the method for the production of a leno cloth are described.

A leno ground fabric is produced over the entire weaving width of a loom by using two heald frames each having a length corresponding to the weaving width. The heald frames are equipped with a multitude of lifting healds or heddles and with a multitude of half healds or heddles that move the leno warp thread and the ground warp threads for the shed formation over the entire loom width.

A method and an apparatus serve to process a catch selvage that has been trimmed from a web being woven on a loom, so as to separate weft thread ends and leno threads from the catch selvage to produce a type-pure weft thread waste and a type-pure leno thread waste or reusable leno threads. The term "type-pure" refers to a waste material containing a single uncontaminated type or color of thread material, e.g. wool vs. synthetic or blue vs. red. After the catch selvage (1) has been trimmed from the edge (11) of the woven web (2), the leno threads (4, 4') are untwisted from each other by being rotated by an untwisting apparatus (5) in a direction opposite the binding twist applied by the leno device (18). Thereby, the full leno binding (1A) is completely unbound and opened, so as to release the weft thread ends (3A), which are then sucked into a proper one of weft waste collection containers (6B) by a suction pipe (6A), so that only a single type-pure and/or color of weft thread end is collected in each container (6B). The unbound leno threads (4) are collected as a type-pure waste or are rewound on spools to be reused. Alternatively, by using endless closed-loop leno threads (4'), the leno threads (4') are continuously recirculated back to the leno device (18), without intermediately being wound onto spools.

The invention relates to a catchcord opening apparatus of loom, aims to provide a catchcord opening apparatus which doses not applies tension to the weft yarn end sharply, and reduces the possibility of texture disadvantage such as weft yarn retraction generated in fabric. The apparatus has: a first shaft and a second shaft disposed opposite wefting side; a plurality of first swing rods supported on the first shaft; and a plurality of second swing rods supported on the second shaft. each swing rod has a inserting hole for inserting warp yarn with actchselvedge, and the swing rods swing to opposite directions; the front ends of the second swing rods are arranged to move into and out from the spaces between the front ends of the first swing rods; the catchcords are arranged to perform an opening movement and intercrossed while clamping the weft yarn ends along with the swing of the first and second swing rods; thereby, in the catchcord opening apparatus of the fluid jet type loom on the catchcord holding weft yarn end, at least two of the first swing rods is inserted into the hole and reached to the cord position line at different times.

In a leno selvedge device, an apparatus for adjusting thread tension of the doup ends and of the stationary threads that are guided through the leno selvedge forming device includes a holding structure accommodated directly in front of the leno selvedge device which keeps the stationary thread and/or the doup end under resilient tension. The holding structure includes at least one eyelet, through which thread is threaded. The eyelet is kept under tension by a spring and disposes the thread in a downward direction.

The invention provides a simple and cheap weaving edge forming device. In terms of the weaving part with carded weft density, the weaving edge forming device can stably form an arc weaving edge through the end of the weft cooperating with the density of the weft, and a rubber strengthening textile weaving loom of a rubber strengthening textile (1) having the weaving part with carded weft density (1a) is generated. The air spray type weaving edge forming device comprises over one weaving nozzles (32) which are disposed at the side of warp for weaving the end part (2a) of the lead-in weft. In the rubber strengthening textile weaving loom, the weaving edge forming device comprises a limiting device (20) which is disposed near the most front position (5) of a reed along the warp direction, and limits the opening of the warp (3) in a part of the warp array having warps at the most external side in the direction of weaving width.

PCT No. PCT/EP97/00495 Sec. 371 Date Nov. 20, 1998 Sec. 102(e) Date Nov. 20, 1998 PCT Filed Feb. 4, 1997 PCT Pub. No. WO97/29232 PCT Pub. Date Aug. 14, 1997A selvage-forming device (1) for a loom includes yarn guide structures (2, 3, 5) to guide at least two selvage yarns (8, 11) that are alternating raised and lowered to form a selvage shed (12). These yarn guide structures are powered through the intermediary of eccentrics driven by their own independently controlled drive (13) and an eccentric drive coupling-bracket (16) that creates a motion by which one selvage yarn (8) is additionally shifted transversely to form mutually crossing interlacings.

A loom, especially an air jet loom for producing a leno cloth with integrated patterning includes a weaving reed and first and second shed forming devices. The first shed forming device includes a pivotable reed as a first guide arrangement for guiding and shedding leno warp threads, and an upright reed as a second guide arrangement for guiding and shedding ground warp threads, to form leno bindings. The second shed forming device includes a third guide arrangement for guiding and shedding patterning warp threads, to form pattern bindings. The third guide arrangement is arranged between the first shed forming device and the weaving reed.

The subject matter of the invention is a device for regulating the tension of a thread unwound from a bobbin of a bobbin-holder for a leno selvedge apparatus, said device comprising a brake drum for receiving the bobbin-holder, said brake drum having a brake means and the device being provided with a guide arm for the thread of the bobbin, the brake means (4) comprising a pivotable brake lever (10) having a brake shoe (4) resting against the brake drum (1), with the brake lever (10) having a guide arm (20) provided with an eye (21) for passage of the thread (6) unwound from the bobbin (5).

The subject matter of the invention is a heald (1), more specifically a lifting heald as a part of a leno selvedge device, said heald comprising a head portion and a base portion with a closed or an open eyelet for mounting to a heald frame or to a heald ridge bar (13), said head portion and/or base portion (2, 3) being adapted to be secured stationarily to the heald frame or the heald ridge bar (13), with the head portion (2) and/or the base portion (3) being adapted to be interlockingly fixed to the heald frame or to the heald ridge bar (13) by means of a detent system (11, 12, 13a).

The present invention provides with a list formation device which enlarges the open angle of yarn fringes without interfere the high speeding in a spinning machine. A power delivery tooth 181 of a wheel 18 is rotating by an electric motor 17 and engaging with power bearing holes 231, 234 of a first ligature 23 and a second ligature 24, respectively. An engage position between the first ligature 23 and the wheel 18 is limited by a first position regulation object 19, and the engage position between the second ligature 24 and the wheel 18 is limited by a second position regulation object 19. A part of the ligatures 23, 24 is inserting into guiding slots 221, 222 of a guiding path 22. A warp-lifting device 11 for use in a first side is supported by hooks 25, 26 of the ligature 23, and A warp-lifting device 12 for use in a second side is supported by hooks 27, 28 of the ligature 24.

The present invention provides an actuator (10) for a shed-forming device for a weaving machine, the actuator (10) being arrangeable for moving at least one warp thread (1), the actuator (10) comprising an artificial muscle (11) having an input for receiving an actuation signal (12), the configuration of the artificial muscle (11) being variable in response to the actuation signal (12) in order to move the at least one warp thread (1). The use of an artificial muscle (11) as an actuator (10) has the benefit of a fast response when a change in configuration is required, reduced power requirements when compared to conventional actuators based on electric motors, compactness, robustness, reduced noise during operation and reduced cost to manufacture.

The present invention provides a fluid jet type weaving machine having a planet selvedge apparatus and a catching side-warp opening device corresponding to high-speed running. The fluid jet type weaving machine having a planet selvedge apparatus and a catching side-warp opening device that are supported on one side reverse to picking of the weaving machine is provided with a driving shaft having a half speed ratio of a main shaft, a rotating shaft is driven by the driving shaft to rotate through a rotating transfer mechanism, and a swinging rod is driven by the driving shaft to swing through a sport changeover mechanism. The rotating transfer mechanism comprises a first toothed rotary part that is moveable in the direction of axial cord and is fixed on the driving shaft, and a second toothed rotary part having an identical number of teeth with the first toothed rotary part and being fixed on the rotating axle, and the rotating transfer mechanism is arranged to form that the connectionphase of the rotating shaft with the driving shaft is changeable. The sport changeover mechanism comprises a rotary part for making the swinging rod swing, the rotary part is moveable in the direction of the axial cord, is independent with the first toothed rotary part, is fixed on the driving shaft and is arranged to form that the connection phase of the rotating shaft with the driving shaft is changeable.

A warp shedding apparatus of a loom includes a plurality healds arranged in a weaving width direction of the loom. Each heald has a thread eyelet through which a ground warp yarn is passed and held. The healds are raised and lowered to form a shed. A difference in tension between raised ground warp yarns and lowered ground warp yarns held by the healds located in opposite end portions in the weaving width direction is greater than a difference in tension between raised ground warp yarns and lowered ground warp yarns held by the healds located in a central portion in the weaving width direction.

An angular servo-motor for the controlled positioning of elements connected to weft or warp yarns, in a weaving machine, essentially comprising a position control angular motor, with direct current sent to a 'brushless' rotor (1), the latter connected to a sequence of elements consisting of cables (5) and small heddle-carrier looms (10, 11); the servo-motor in question is capable of conferring an alternating motion to the aforesaid small heddle-carrier looms (10, 11), such to obtain the desired weaves between the weft and warp yarns.