Abstract: A varnish-coated electric wire includes cured coatings of polybenzimidazole. The polybenzimidazole coatings are cured utilizing a polymerization initiator. The varnish-coated electric wire has a high heat-resistance.

Abstract: A heat-resistant roll for copying machine use which comprises a metallic roll having a surface which has been coated with a varnish containing polybenzimidazole as a major resin component, followed by curing, wherein the coating is conducted by means of rotational coating with application of pressure.

Abstract: A wiring assembly for equipment is produced at a low cost and has the same wiring connection as a flexible printed cable (FPC). Various kinds of terminal treatment processes are applied to the assembly. A circuit is formed by arranging polyurethane-insulated magnet wires 21 on a polyimide (PI) sheet 22 formed along a wiring circuit having bent, curved, and branched (jointed) portions. The formed circuit is coated with a PI sheet 23. Accordingly, an etching step such as in an FPC is not required. It is possible to produce a wiring assembly having the same function as an FPC at a low cost and to effect various kinds of terminal treatments as with an FPC. A wiring assembly having a single crossing in a circuit is formed by using insulated conductors.

Abstract: The present invention improves the quality and productivity in a coating peeling-off process in which the coating at an intermediate portion along the length of a wire is peeled off in order to expose a conductor inside the coated wire, while enabling coatings at intermediate portions along the length of multicore wires or small-diameter wires to be peeled off.In a primary process, a heating jig 16 is brought into press contact with the upper half portion of the coating of the peeling-off designated portion at an intermediate potion along the length of coated wires 1 so as to press down the coating downwardly relative to the transverse direction of the wires, whereby a coating peeled-off portion 20 in which a part of conductors 2 is exposed is formed.

Abstract: The present invention improves the quality and productivity in a coating peeling-off process in which the coating at an intermediate portion along the length of a wire is peeled off in order to expose a conductor inside the coated wire, while enabling coatings at intermediate portions along the length of multicore wires or small-diameter wires to be peeled off.In a primary process, a heating jig 16 is brought into press contact with the upper half portion of the coating of the peeling-off designated portion at an intermediate portion along the length of coated wires 1 so as to press down the coating downwardly relative to the transverse direction of the wires, whereby a coating peeled-off portion 20 in which a part of conductors 2 is exposed is formed.

Abstract: A flat multicore wire of the present invention has an end structure in which a group of round wires are disposed in a plane-like fashion in parallel with each other at predetermined intervals. In which coatings of the end portions of the group of round wires are uniformly peeled off so as to enable a group of exposed conductors so formed to act as contact portions, in which a connecting tape of a certain length is applied over the top surface of the coatings of the group of round wires along the proximal portions of the contact portions, and in which a securing tape is applied on the underside of the group of exposed conductors in such manner that the securing tape extends over a part of the coatings of the group of round wires.

Abstract: A double-twist type compact conductor manufacturing apparatus is comprised of a supply device for supplying conductor strands, a conductor twist machine, a converging and compacting die for converging and compacting a plurality of the conductor strands, and a capstan having a groove shaped so as to maintain the form of the converged and compacted conductor, as well as to provide feeding of the same. The converging compacting die is disposed upstream of the capstan but downstream from the conductor supply device and the conductor twist machine is downstream of the converging compacting die. The conductor twist machine is a double twist machine for imparting a double twist to the conductor. This configuration of the apparatus serves to prevent not only deformation of the twisted wire but also the breakage thereof.

Abstract: A filament drawing device for drawing a plurality of strands simultaneously in a downstream direction through a plurality of groups of dies, there being one die for each strand. Each group of dies is held in a retaining mechanism including first and second portions which are adapted for movement toward and away from one another. When the retaining mechanism is in the open position, wherein the portions have been moved away from each other, any one of the plurality of dies may be removed without removing or displacing other dies in the same group. When the portions are moved toward each other, they overlie at least partially the dies in the group and thereby retain them in position.

Abstract: A device for twisting multi-stranded wires having a first twisting portion comprising a supply reel carrying the wire and a first flyer bow rotatable about the axis defined by its ends. A second twisting portion, downstream of the first portion, has a second flyer bow which rotates about the axis defined by its ends. Means are provided for drawing the wire through the first portion and into the second portion and onto a take up reel. The wire is twisted in each of the first and second portions.In a preferred form of the device, a wire divergence plate, having a plurality of holes, is provided downstream of the supply reel. A convergence die is located downstream of the plate and upstream of the upstream end of the first flyer bow. The strands of wire pass separately through the holes and are brought together when passing through the die.