Abstract: A fabric based on raw or pulp-colored polypropylene is intended in particular for use as a “mechanical fastener” of the hook and loop type and utilization of the fabric in health and personal care sector.

Abstract: A fabric based on raw or pulp-colored polypropylene intended in particular for use as a “mechanical fastener” of the hook and loop type and utilization of said fabric in health and personal care sector.

Abstract: Process for the production of warp-knitted fabrics realized from discontinuous natural or synthetic yarns constituted of at least 50% of discontinuous fiber yarns, or yarns constituted of at least 50% discontinuous fiber, comprising the healding of the yarn in an air current, warp-knitted fabrics from discontinuous fibers so obtained, and apparatus for the production thereof.

Abstract: For improving the cleaning effect of a fibrous material in an opener (1) comprising a rotatable opener roller (2) and blades (3,4) and carding plates (5) cooperating with the peripheral surface of the roller (2), there is provided in the material drawing zone at least one separator element (13) for the air current (14) generated by the rotation of the opener roller (2). The separator element (13) penetrates with a certain angle into the air current (14) and so it allows to deviate away from the opener roller (2) a radially outermost part of the air current (14), which owing to a greater centrifugal action includes residual impurities and cotton flocks still incorporating dirt or not yet opened because they have remained clamped between the teeth of the roller clothing, whereas the radially innermost part of the air current (14), which carries cleaned fibrous material that is lighter, is conveyed towards the outlet (16) for the material. The separator element (13) may be adjustable in position.

Abstract: A process of and a feeding device for feeding material in fibre form to a machine for preparing the material for subsequent spinning includes a material feeding bin through which the material is continuously fed to a substantially horizontal feeding table situated approximate a rotary preparing roll. The horizontal feeding table and the approximate rotary preparing roll define an air gap therebetween. A feeder roll is located above the feeding table which conveys the material toward the air gap, and the feeding table is supported to move in a substantially radial direction relative to the rotary preparing roll under the influence of data detected by a detecting device which detects the impurity level of the material at a point upstream of the feeding table relative to the direction of fibre flow.

Abstract: A device to form the selvedge in shuttleless looms, includes a weft yarn gripping member, a first shaft reciprocable lengthwise to operate the weft yarn gripping member, a first linear electric motor to reciprocate the first shaft, a cutting member for cutting weft yarn gripped by the gripping member, a second shaft reciprocable lengthwise to actuate the cutting member, and a second linear electric motor for reciprocating the second shaft. A yarn engaging hook is carried by a needle to insert weft tails cut off by the cutting member, into a strip of warp yarns, thereby to form a selvedge. A third shaft carries the needle, from which said needle extends transversely. A third linear electric motor reciprocates the third shaft lengthwise. A sensor senses the reciprocated position of the third shaft thereby to control the third linear electric motor. A fourth linear electric motor rotates the third shaft.

Abstract: In a system for automatically controlling the tension of weft yarns fed to a loom with continuous weft feed, the extent of braking of the weft yarn is controlled based on signals output from a device for measuring weft yarn tension. Specifically, signals from a weft yarn tension measuring device are output to an electronic interface unit, which processes those signals and directs an actuator to brake the weft yarn more heavily when the detected tension is below a predetermined level, and less heavily when the detected tension is above a predetermined level.

Abstract: In a heald frame for weaving looms, wherein the two heald slide bars consist of standard elongated sections, the lower heald slide bar is formed of an elongated section of width smaller than that of the elongated section forming the upper heald slide bar.

Abstract: A strap controlling the motion of weft yarn grippers in shuttleless looms, allowing to detect its state of wear, is provided with layers or inserts distributed according to the thickness and positioned along the length of the strap, adapted to supply optic, electric or magnetic signals indicating the wear of the strap.

Abstract: A guide for the motion of a pair of weft grippers inside the shed of a shuttleless loom, in which two control straps each carrying one of the grippers move on a substantially horizontal plane under the action of two gearwheels with reciprocating motion. A plurality of elements guide the straps in this motion, these guide elements being aligned on a sley facing a reed of the loom and positioned perpendicularly thereto, the straps having a substantially rectangular section of greater width than thickness and a shaped recess extending along each longitudinal side edge. The guide elements are substantially horizontal tooth projection, shaped like and engaged in those recesses. The projections are wedge-shaped, the apices of the wedges being substantially half way along the thickness of the straps. The straps are wider and thicker adjacent the grippers than remote from the grippers.

Abstract: A device for the automatic control of the weft yarn feed in air looms which includes a weft yarn feeder and sensors to sense the time required for each turn of the weft yarn leaving the feeder to unwind. The sensors generate a signal which is received by an analysis circuit associated with a programmable control circuit which controls the feeding of the weft yarn. The feeding of the yarn can be varied based on differences in the physical characteristics of the yarn which effect the operation of the loom.

Abstract: A guide for the to-and-fro motion of a pair of weft carrying grippers inside the shed of weaving looms with continuous weft feed, of the type comprising two control straps movable in a substantially horizontal plane thanks to the action of two gearwheels with reciprocating motion, and a plurality of guide elements for the straps, aligned on the sley facing the reed and positioned perpendicularly thereto. The strps have at least one undercut groove and the guide elements are open and form pairs of bilateral guides for the straps, of which they engage the undercut groove. The guide elements are suitably hook elements, open towards the reed, and the straps project out of these elements towards the reed, the pairs of bilateral guides each operating according to at least two orthogonal planes.

Abstract: Improved structure for guiding the weft-carrying grippers and their control straps through the shed of gripper looms comprises a single plurality of guide elements (3) aligned on the sley (1), each element (3) being provided with at least two distinct seats (4, 5) for housing respectively the strap (6) and the gripper (8), the seat (5) housing the gripper (8) being apt to prevent--either by itself or in cooperation with the seat (4) for the strap (6)--any lateral or upward movements of said gripper (8).

Abstract: A pair of weft grippers for moving weft yarn through a shuttleless weaving loom, comprises a carrying gripper for carrying the weft partway into the sheds of the loom and a drawing gripper for thereafter receiving and completing the passage of the yarn through the sheds. Each gripper has a body of solid synthetic resin faced on opposite sides with sheet steel that is partially embedded in the resin by molding. The spaced-apart steels shells impart great rigidity and wear resistance to the body, at the same time that the plastic body between the shells achieves light weight and low cost of the gripper.

Abstract: Unwinding device for twin warp beams, with two separate unwinders, wherein the adjustment of the two unwinders (3, 4) is carried out according to the inclinations, detected by sensors (23, 24), which the two yarn carriers (5, 6) of the beams (1, 2) take up under the different tensions of the warp yarns (f).

Abstract: A composite gearwheel structure for reciprocating the gripper-carrying straps in weaving looms, comprises a gearwheel body of synthetic plastic material. Its teeth are partially covered with sheet metal associated with the body and forming an integral part thereof.

Abstract: A pair of weft carrying grippers, of the type wherein the weft yarn is retained by engagement of the head of a slider moving lengthwise, with a counteracting cooperating surface of the gripper body, the slider being thrust forward by a spring and being released by pulling a flexible lamina element connected thereto. In this pair of grippers, the flexible lamina element causing the release of the slider is controlled by a rotary cam having a slightly curved contour, around which the element may wind smoothly. Moreover, the slider head is shaped like a helical wedge, adapted to mate with an equally shaped counteracting surface of the gripper body, or it may carry at least one spring lamina, adapted to engage with a substantially flat counteracting surface of the gripper body.

Abstract: A device for preventing dust deposits on weft feeders for weaving looms--of the type wherein the amount of weft yarn being drawn from a reserve wound on a drum of the feeder, to be fed to the loom, is reckoned by a detecting unit--comprises nozzles for blowing blasts of air between the detecting unit and the drum.

Abstract: In a mechanism to control the movements of the weft carrying grippers in shuttleless weaving looms--of the type wherein a gearwheel controlling the grippers carrying strap is caused to rotate forward and backward by a variable pitch cam screw, passing longitudinally through a slider which moves forward and backward along a forced rectilinear path--the slider carries structure engaging the threading of said screw and adapted to cause the rotation thereof, comprising opposed pairs of oscillating sliding blocks.