Abstract: In a weft detecting device, optical fiber bundles, lenses, a light emitting module, a light receiving module, and an amplifier are integrated in a thin detecting sensor body having substantially the same shape of that of reed dent so that the device can be fitted in the narrow space between the reed dents of an air jet loom.

Abstract: The invention provides an end structure for at least one optical fiber ribbon wherein the same-side ends of the optical fiber ribbons are bundled together and tightly fitted in a metallic sleeve member so that coating layers of the optical fiber ribbons may be on the inner surface of the metallic sleeve member.

Abstract: The invention provides a working equipment for roughening the side of optical fiber having a hot stamper, a sheet having rough surface to be transferred, a cushion, and a cushion-mounted plate having a portion formed in stepwise or continuously curved or sloped form.

Abstract: Disclosed is a hollow-fiber filter module having a novel structure in which a large number of hollow fibers for filtration use are disposed in a rectilinear fashion, two exit planes are defined by the opposite open ends of the hollow fibers, a filtrate collection chamber is formed over one of the exit planes, and one or more filtrate conduits are provided in order to conduct the filtrate collected in the filtrate collection chamber to the other exit plane. A reinforcing ring helps secure the filtrate conduits. This hollow-fiber filter module permits the efficient utilization of a hollow-fiber filter membrane and, therefore, can reduce the space occupied by the module. Moreover, a plurality of such hollow-fiber filter modules can be connected in series and used in the form of a hollow-fiber filter module assembly having a length of several meters.

Abstract: Disclosed is a hollow-fiber filter module having a novel structure in which a large number of hollow fibers for filtration use are disposed in a rectilinear fashion, two exit planes are defined by the opposite open ends of the hollow fibers, a filtrate collection chamber is formed over one of the exit planes, and one or more filtrate conduits are provided in order to conduct the filtrate collected in the filtrate collection chamber to the other exit plane. The hollow-fiber filter module permits the efficient utilization of a hollow-fiber filter membrane and, therefore, can reduce the space occupied by the module. Moreover, a plurality of such hollow-fiber filter modules can be connected in series and used in the form of a hollow-fiber filter module assembly having a length of several meters.

Abstract: The present invention discloses a hollow-fiber filter module comprising (a) an annular member, (b) a filter membrane consisting of a large number of hollow fibers, (c) a fastening member attached to the inside surface of the annular member for bundling and fixing the hollow fibers in a U-shaped pattern with their both ends left open, (d) a supporting member consisting of a plurality of supporting pillars or a cylinder, said supporting member being joined to said annular member and extending along the U-shaped portions of the hollow fibers, and (e) a hollow fiber retaining member joined to the supporting member and extending through the space enclosed in the U-shaped portions of the hollow fibers. This hollow-fiber filter module is suitable for use in water purifiers for treating large volumes of water containing minute colloidal particles and can be efficiently regenerated by gas bubble treatment to restore its filtering function.

Abstract: A sheet material is formed of a base cloth consisting of a woven fabric, knit fabric, nonwoven fabric, or web material having a favorable form stablity and a short fiber material consisting at least partly of a natural fiber material, said sheet material having a structure in which said base cloth is covered on at least one surface with the short fiber material and a part of the short fiber material is stuffed into the gaps in the network of the base cloth so that the base cloth and short fiber material are substantially integrated with each other.

Abstract: An apparatus for producing composite structure fibers is disclosed which includes an upper distribution plate provided with plural slits for making at least two spinning components into independent thin layer streams, a lower distribution plate provided with plural fine holes for dividing each of said thin layer streams into plural fine capillary streams independent from each other and a spinneret plate provided with a bundling space and extrusion orifices for bundling said previously divided fine capillary streams and extruding them into filaments, said upper distribution plate, lower distribution plate and spinneret plate being piled up in this order.