Abstract: A method for collaboratively constructing a column envelope profile of two flanks of a star wheel tooth includes steps of: determining a tooth width B of a star wheel according to a diameter of the star wheel and a dimension of a root circle; thereafter, geometrically representing positions and shapes of the two flanks by two base columns having parallel axes and the same diameter; wherein: the axes of the base columns are parallel with a center line of the star wheel tooth; on a section of a tooth top of the star wheel tooth, a local projection of a first base column close to a front flank is projected on a lowermost part of a projection of the front flank; and a local projection of a second base column close to a back flank is projected on an uppermost part of a projection of the back flank.

Abstract: The present disclosure relates to an apparatus for joining tissue in surgical applications and/or incision repair, and to methods for making the same. The apparatus includes an elongated member formed of a biocompatible material, and a rigidifying agent associated with a distal end portion of the elongated member, wherein the rigidifying agent increases the rigidity of the distal end portion such that the distal end portion is mechanically reconfigurable to define a penetrating end integrally formed with the elongated member.

Abstract: In the case of a process for the continuous heat setting of yarn, the yarn, laid down in loops on transport belts, is fed through a heat setting chamber which operates with superheated steam and under atmospheric pressure. Because of the entry and exit openings, the temperature inside the heat setting chamber is constant only over a part of the transport length. The chamber temperature is set slightly above the required heat setting temperature. Transport speed and chamber length are so adjusted in relation to each other than the yarn, having reached the heat setting temperature, essentially retains it along a part of the transport length.

Abstract: A system for automatically rippling and hackling wig yarns. The system comprises a rippling heater having a pair of wave rollers each having a waveformed surface and a heating coil, a cooler having a cooling belt and a blast unit comprising a blast fan, a blast pipe and a blast diffuser, a hackling device for hackling the wig yarns from the cooler, a pair of tension rollers arranged between the cooler and the hackling device, and a plurality of pulling rollers having different diameters. The hackling device comprises a plurality of hackling units and/or a plurality of hackling conveyors. The hackling unit includes hackle bar driven by a drive unit, the hackle bar having a plate provided with a plurality of erected hackle pins and vertically reciprocating by the rotational force of the drive unit.

Abstract: In the crimping process the yarns (1) are introduced continuously into a crimping machine (3) in which they are subjected to a compression which has the effect of crimping them.Before being introduced into the crimping machine (3) the yarns (1) are subjected to a presteaming operation in a chamber (6).Use especially for improving the bulk of the yarns before they are crimped.

Abstract: A machine for crimping yarns has an elongate chamber (14) with, at one end, an opening (15) for introducing the yarn (1) to be crimped and, at the other end, an opening (16) for exiting the crimped yarn. The wall (17) of the chamber (14) includes an elongate opening (18) parallel to the axis of the chamber, in which fingers (19) , uniformly distributed along the opening (18) are engaged. A drive (20) is provided for moving the fingers (19) in order to permit them to move the crimped yarn positively towards the exit opening (16) of the chamber (14).

Abstract: An apparatus for crimping and permanently heat setting a fiber or tow without stress or tension, comprising a mechanical crimping means, a conveying means which receives the crimped fiber or tow, and a heating or irradiation zone through which the conveying means and fiber or tow passes.

Abstract: An apparatus for crimping and permanently heat setting a fiber or tow without non-uniform stress or tension, comprising a conveying means having a multiplicity of openings, means for supplying the fiber or tow across the conveying means, means for inserting the fiber or tow into the openings of the conveying means whereby the fiber is retained in a non-linear shape in the openings without stress or tension, and a heating or irradiation zone through which the conveying means and fiber or tow pass.

Abstract: Apparatus for mechanically crimping and shrinking textile webs mainly comprises an elongated chamber through which the textile web is moved in a predetermined direction, at least two endless crimping grates arranged in said chamber and each including an endless link chain and a plurality of crimping plates projecting equally spaced from each other in a direction transverse to the chain from the latter and in which each endless chain is guided over a pair of guide rolls so that each chain has one run moving in the direction of movement of the web through the chamber and another run moving in the opposite direction. The apparatus includes further heating means having a heated smooth guide surface opposite said one run of each endless chain and said textile web is passed between the respective heated guide surface and the outer ends of the crimping plates on the one run. The chains on successive crimping plates are driven in opposite directions and preferably at speeds which can be steplessly adjusted.

Abstract: A machine for the crimping of yarns, in particular for producing false, wavy hairs for wigs, wherein the yarn, coming from a delivery package, is spirally wound about a cylindrical, supporting element, said yarn being eccentrically led through a mandrel, which is revolvingly driven about said supporting element, coaxially therewith.