Abstract: The arrangement can control the pulling tension of a thread 1 during its wind-off or wind-up, from or to a spool 3. The arrangement includes a thread brake 5 having a local portion 6 and a portion 8 movable relative thereto, between which the thread 1 is pulled during the wind-up or wind-off and which provides a frictional force upon thread 1. Furthermore, the arrangement includes an actuator 13 for applying a frictional force applied by thread brake 1 to thread 1 may be controlled. Preferably included is a piezoelectric sensor 14 which may be deformed by the force applied by the thread to the sensor 14. In the prior art, the actuator comprises a setting nut and a spring whose operation is time-consuming.

Abstract: In a warping machine, once a temporary feed speed for a warping reed is set in synchronism with the speed of rotation of the warping drum, the winding thickness of the warp lap is detected several times and the feed speed is corrected depending on the number of revolutions of the warping drum and the winding thickness that results therefrom. The winding of the warp lap is then completed at the corrected feed speed. During a starting phase, a theoretically correct feed speed for at least the first revolution of the warping drum is derived from warp parameters, such as the total number of threads, the width of the warp and the yarn count. The winding thickness of the first warp section is continuously and contactlessly measured during a learning phase that follows the starting phase, or during the starting phase. For that purpose, a winding thickness measurement arrangement is held at a predetermined, substantially constant distance from the surface of the warp layer that has just been wound.

Abstract: An apparatus for needling a fibrous web comprises a row of needle beams arrayed adjacently each other in a direction of an operating width. The needle beams may be attached to exchangeable needle boards and are driven with the needle boards up and down in a reciprocating motion path. The fibrous web is guided by a fibrous web support and a stripper positioned between the needle beams and the support. A conveyor conveys the exchangeable needle boards to and from the needle beams. The conveyor device extends alongside the row of needle beams and comprises revolving endless traction devices arranged at each side of the needle beams outside the reciprocating motion path, and needle board entrainment elements in the form of bearing flanges for supporting side edges of the needle boards.

Abstract: A holding device can holding implements for a knitting machines such as needles or guides. A needle (or guide) head (2) is held detachably on a carrier (9) by means of plug-type connections and a locking device. The needle head (2) is connected in one piece with a shank (3), which is flat and has a lateral recess (16) near its end. A holder (4) is arranged on the carrier (9). Following a guide section (19) matched to the shank cross section, the holder has a sprung catch (15) movable in the shank plane perpendicular to the shank axis. This catch can engage the recess (16) under pretension. More particularly, the holder (4) has between two external cover plates(6, 7), a middle plate (5) having free punchings forming the guide section (19) and the spring tongue (14). In this way the needle heads can be easily replaced individually.

Abstract: In a method for manufacturing a warp knitted fabric, the guides can also be displaced by one needle space (pitch) in addition to the overlap and underlap shog of the guide bar, so that the guides are not only selectively displaceable during the underlap shog, but also selectively during the overlap shog. A warp knitting machine for the purpose of carrying out the method comprises at least one thread system which consists of pattern threads laid in intermixed, varying patterns. These pattern threads have underlaps of n, n+1 and n-1 needle spaces and can produce a float and/or a twill. The number of pattern possibilities can be increased in this manner.

Abstract: In a process for the production of short warps, especially pattern weaves, an individual thread (1) of different or the same color is wound up on a wind surface (9,11) sequentially with turns lying next to each other in an individual layer. This layer corresponds to the warp length. A thread guide (4) is movable around the circumferential contour of a wind-up arrangement (2) in the wind plane. A forwarding arrangement further moves the side-by-side wound thread warp at each circuit of the thread guide (4) by an amount equivalent to the thread thickness. The first individual threads (1) are wound on a support surface (11) displaceable orthogonal to the wind plane (10). Each further individual thread (1) is wound onto the previously wound thread warp (18), having been displaced rearwardly by an amount at least equivalent to one thread thickness.

Abstract: An arrangement can produce short warps, in particular for woven patterns in which threads (1) of different colors are wound onto a winding arrangement in single layers next to each other and sequentially with respect to each other. The arrangement has positioned at one end face (8) of the winding arrangement a thread laying device (4), which rotates around the circumferential contour of the winding arrangement (2). At least one thread (1) is pulled from a spool (14) in a spool magazine (12) and laid off onto a feed arrangement (16) located on the circumference of the winding arrangement (2) in a winding plane. This feed arrangement transports the wound up thread sheet perpendicular to the winding plane by an amount corresponding to the wind growth. The thread sheet, obtained as an endless sheet band in the direction transverse to the winding direction, can be cut open after completion of the thread warp.

Abstract: At least one pattern thread (8) is bound into the fabric ground in a process for producing a patterned knitted fabric (12). The process uses a warp knitting machine having one needle bar (1), at least one fabric ground laying bar (2,3a), at least one pattern laying bar (9) carrying guides (7) for pattern threads and a knock-over arrangement (9) over which the fabric (12) can be pulled. The pattern thread (8) is grasped, by a grasping device (16), and held between the pattern thread guide and the knock-over arrangement (9). The grasped pattern thread is then severed proximal to the knock-over arrangement, by a cutting device (13). The severed pattern thread is held out of the knitting process for a predetermined time, before being bound again into the fabric ground, no earlier than after a new stitch formation. The excess pattern thread is again severed near the knock-over arrangement (9) and the freed thread cuttings removed.

Abstract: The described apparatus for needling a nonwoven web comprises at least one needle beam for carrying a needle board, a rocker for guiding the needle beam and a slider-crank mechanism for actuating the needle beam. To effect a mass compensation it is proposed that two needle beams are arranged one behind the other in the direction of travel of the nonwoven web and are guided each by a rocker and actuated each by a slider-crank mechanism and that the two slider-crank mechanisms comprise parallel crankshafts or eccentric shafts, which are rotated in mutually opposite senses.

Abstract: A warp knitting machine having at least one guide bar (1) comprises a plurality of retaining segments (11) releasably attached to the guide bar (1). The retaining segments receive in each case a subassembly (17) of piezoelectric bending transducers (9) for displacing the guides by a knitting needle space. The control lines leading to the bending transducers (9) are provided with connector contacts (37) for the purpose of being releasably connected to the control device (42). In this way, it is possible to replace rapidly guide, bending transducers or control lines.

Abstract: An apparatus which serves to needle a nonwoven web and comprises at least one needle beam for carrying at least one needle board, a rocker, which carries the needle beam and comprises at least two parallel arms, which are pivoted to a frame, and a slider-crank mechanism, which is coupled to the rocker or the needle beam. To permit an adjustment of the lift of the needle beam it is proposed that the slider-crank mechanism is adapted to be pivoted to the needle beam or the rocker at different distances from the pivotal axis of the rocker.

Abstract: The arrangement controls thread tension in a spool creel with a brake rotor (brake drum 4) for each spool holder (1). A braking element (brake band 5) operates therewith and is biasable by a tensioning lever (8) which takes an angular setting dependent upon the thread tension and the force of gravity. A fluid pressure activated biasing arrangement 13 influences the tensioning lever 8 at each spool holder 1. The fluid pressure is commonly adjustable for all of the biasing arrangements 13. In this manner a general changing of the thread tension can be combined with control of individual thread tension.

Abstract: A warp knitting machine has a machine base (10), a main shaft (12) and knitting tool bars (13 to 17). Placed on the machine base is at least one gear box (18), having at least one side wall (24, 41), which is pierced by a bearing (25). A gear mechanism (27; 43) interacts on an inner portion of a shaft segment (24; 41). The outer portion of this shaft segment is drivably connected with a carrier arm (19; 37) for tool bars (13, 14, 15). In this manner, one obtains a very compact construction which inhibits oil leakage and substantially reduces noise emission while also offering the possibility of reducing the force necessary to operate the bars.

Abstract: The described apparatus for needling a circular nonwoven web, particularly a nonwoven web having the configuration of a circular ring, comprises a needle board, which carries a multiplicity of needles and is adapted to be driven to reciprocate said needles in a predetermined piercing direction. The apparatus also comprises a turntable (1), which comprises a web support that is adapted to support the nonwoven web. The needle board is provided with needles only in at least one sector-shaped region, which has the configuration of a sector with respect to the axis of rotation of the turntable.

Abstract: In a warp-knitting machine with jacquard control, guide needles (1) are fastened to a guide bar (6) by means of carrier strips (3) which are bendable by at least one piezoelectric bending transducer. Each carrier strip (3) consists of electrically insulating material. The strip carries on at least one side, a layering consisting of (a) an inner electrode (8 to 11), (b) a piezoelectrically active layer (15, 17) covering the latter and (c) an outer electrode (16, 18). A control circuit (29) selectively supplies the inner electrode (8 to 11) with control voltage, while the outer electrode (16, 18) is connected to a reference potential. A contact-protected Jacquard control operated piezoelectrically is obtained in this way.

Abstract: A warp knitting machine having a main shaft has at least one bar mounted to reciprocate in accordance with a predetermined schedule. The machine also has an electrically activated drive arrangement with a body made of a material that can alter at least one of its dimensions in dependence upon the magnitude of an applied field. The machine also has a control arrangement coupled to the drive arrangement for providing an electrical signal thereto, in accordance with the predetermined schedule and in dependence upon the angular displacement of the main shaft. This electrical signal can establish the applied field with a predetermined timing within each displacement step of the one bar.

Abstract: Arrangement (15) for adjusting the tension of a thread which is pulled from a spool by means of a thread take-off arrangement, has a thread measuring device (23). This thread measuring device, positioned sequentially in the direction of thread travel, can determine thread tension. Also included is a driven drum (17) whose effective circumferential speed is alterable in the same sense as the measured thread tension. In this manner, it is possible to achieve very small thread tensions.

Abstract: A needle bar is made from a support member and a carrier. The needle bar can be made with a plurality of needle grooves. The bar is made by adhering the support member to the carrier. Then the support member is divided into a plurality of individual segments of predetermined length, after the support member is adhered to the carrier. Adjacent ones of the individual segments (a) can be spaced to form a gap narrower in width than the needle grooves, and (b) can have opposing edges shaped to form a concavity having a width equivalent to the needle grooves.

Abstract: A compensating thread brake useful, in particular, with warping creels. The thread brake has a rotatable roller whose circumference is at least partially surrounded by and drivable by thread. The roller is connected to the rotor of a turbine. A mechanical thread tension comparator by way of its setting member, influences a throttle in the path of the turbine inlet or outlet stream. The setting member may, preferably, be a throttle plate which regulates the inlet or outlet ports of turbine T. In this manner, the thread tension may be controlled without frictional load on the threads or the need to provide seals against oil or the like. Additionally, an eddy current brake can be provided for the nominal setting of the basic thread tension.

Abstract: Threads are warped with an axially moveable slide onto a drum having a cone, into a plurality of successive warp bands. The threads are warped for a first band based on a predetermined advancement schedule for the slide. The warping of the first band, after a predetermined initial phase, is performed by: (a) measuring an aspect parameter, signifying the form of the winding of the first band, (b) correcting the predetermined advancement schedule of the slide based on a comparison of the aspect parameter and a targeted parametric value to compose a corrected advancement schedule, and (c) storing a successive plurality of descriptive parameters signifying the evolving form of the winding of the band, when successive revolutions of the drum meet a predetermined drum schedule.