Abstract: A draft device for a spinning machine comprises a plurality of pairs of a top roller and a bottom roller, a draft cradle for supporting shafts of the top roller and a belt tenser. Top roller shafts are supported by a top roller support which is rotatably supported on a frame at one end thereof and side plates for fitting the top roller shafts therein, and spring members for pressing the roller shafts are disposed within the top roller support. A tenser of the belt tenser has an engaging portion wherein the top roller shaft is loosely fitted.

Abstract: A spinning machine wherein a yarn knotting truck having a knotter provided thereon travels in a truck travelling spacing provided along a number of spinning units further includes an apparatus for automatically doffing winding packages which have yarns fully wound thereon. A doffing truck which has provided thereon a doffing apparatus travels in the truck travelling spacing.

Abstract: A device for the uniform retrieval of yarn ends in an air spinning device. A suction force gradient is created between the air jet nozzle and the waste suction pipe. Gravitational force and the suction gradient cause broken yarn ends to drop from the air jet nozzle orifice toward the waste suction pipe. When yarn piecing is desired, a piecing suction pipe retrieves the yarn end from the nozzle orifice.

Abstract: An air nozzle for spinning yarn is positioned adjacent a pair of drafting rollers. The space between a cap covering the nozzle and the nozzle itself forms a tank for the air to be jetted through the nozzle. A tapered throttle located behind the nozzle reduces resistance to air exiting from the jetting ports.

Abstract: A yarn slacking apparatus for slacking and retaining a fed yarn therein during the knotting operation in a winder. The sucking action is caused in the slack tube only when the knotting operation is carried out, while the sucking action of the slack tube is stopped by means of providing a shutter means for an opening of the slack tube, when the knotting operation is not conducted.

Abstract: An air current rectifier plate surrounds the foremost air jet nozzle in an air spinning device. The rectifier plate produces a non-turbulent flow of air toward the waste suction pipe and prevents debris from back-flowing into the air jet nozzle.

Abstract: A process for producing tetrafluoroethylene/hexafluoropropylene copolymer having a hexafluoropropylene content of 8 to 20% by weight and having an excellent stress-cracking resistance and also excellent heat resistance, molding properties, chemical resistance and electrical characteristics, which comprises polymerizing tetrafluoroethylene monomer and hexafluoropropylene monomer in the presence of a polymerization initiator, wherein the tetrafluoroethylene monomer is used in a large amount at the first stage of the polymerization reaction and thereafter the polymerization reaction is continued in a smaller amount of the tetrafluoroethylene monomer.

Abstract: A seat cushion of a rear seat is cut away at its forward part to provide a forwardly and upwardly opening recess. A foldable cushion is usually received within the recess, while it is foldable upwardly and rearwardly to be laid upon the remaining portion of the seat cushion. A backrest of a front seat is tiltable to be substantially planar with the rear seat cushion to be received the recess, forming a sleeper's bed.

Abstract: An apparatus for automatically feeding yarn cops to a cop supply device providing yarn cops to an automatic winder in sequence with the heads and tails of the individual cops properly positioned. The cop supply device has a cop sequencing device receiving cops thereon randomly and discharging them one-by-one in sequence. The cops are conveyed from the cop sequencing device and may be sorted and stored automatically in groups according to characteristics of yarn thereon. The automatic winder controls the cop sequencing device output depending upon its own demands and the cops are transported by means controlled by the winder for routing to the winder and are arranged by means automatically as to the relative positions of the heads and tails thereof in a desired relative position.

Abstract: Cops doffed from spinning machines are supplied at random to a cop sequencing device of high frequency vibration type, issued therefrom in sequenced order and fed to one or more sets of automatic control of their head and tail directional disposition.