Abstract: A plant growth regulator comprising, as the active substance, one or more of N-substituted alanine derivatives of the general formula: ##STR1## wherein X represents halogen atom or trifluoromethyl, R represents hydrogen, straight chain or branched chain alkyl having 1-4 carbon atoms, alkenyl having 2-4 carbon atoms, an alkali metal atom or amine-forming residue, and n is zero or an integer of 1 or 2, with the proviso that when n is 2, X may be same or different, together with an inert carrier or diluent, in particular, an agent effective for controlling suckers of tobacco, and a process for regulating plant growth by using said plant growth regulator.

Abstract: A belt-operated false-twisting unit having two endless belts extending across each other and urged against each other at the intersection. The belts are drivable to run in opposite direction for nipping a yarn at the intersection to false-twist the yarn. The belts and yarn guides are set to form a parallelogrammatic region in the intersection of the belts, where the yarn is nipped and false twisted.

Abstract: An apparatus for setting and maintaining the nip pressure at a predetermined level in a false twister where two belts running in opposite directions are crossed in such a state that the surfaces of both the belts are contacted with each other and a yarn is nipped at this crossing point by the two belts to impart false twists to the yarn is disclosed. This nip pressure setting apparatus includes a device for compensating variations of the nip pressure where according to decrease of the nip pressure, at least one of pulleys supporting the belts is moved in a direction approaching to the opposite belt so as to increase the nip pressure and maintain it at a predetermined level.

Abstract: A false twisting apparatus comprising two endless belts crossing each other and running in opposite directions at the crossing point is disclosed, in which a yarn running through the crossing point is nipped by both the belts at the crossing point and is false-twisted by a frictional effect caused between the two belts. In this false twisting apparatus, the angle of crossing of the two endless belt is set in advance, and the apparatus may include means for detecting minute variations of this predetermined crossing angle and correcting such minute variations.

Abstract: A false twisting spindle comprises a turbine including a hollow turbine shaft, a twister pin mounted in the hollow shaft and a turbine blade impeller. The turbine is mounted in a hollow hole of a housing by being supported by means of fluid bearings. The most preferable diameter of the turbine blade impeller is determined depending on the denier of a yarn employed.

Abstract: A false twisting spindle comprises a turbine including a hollow turbine shaft, a twister pin mounted in the hollow shaft and a turbine blade impeller. The turbine is mounted in a hollow hole of a housing by being supported by means of fluid bearings. The most preferable diameter of the turbine blade impeller is determined depending on the denier of a yarn employed.

Abstract: A bobbin tube, particularly suitable for use in filament winding apparatus having automatic bobbin-changing mechanisms, has a tubular body provided on its outer circumferential surface with tentacular filament engaging material provided on at least one portion of this surface, so as to engage and capture a filament which moves over the surface.

Abstract: The present invention relates to a false twisting device comprising false twisting spindles including a turbine provided with turbine blades capable of rotating by employing of fluid and controlling device for the rotation number of the turbine. The control of the rotation number can be performed by using a rotation number detector, a rotation number prescribing device, a controller for controlling the rotation number of each turbine through a sevo valve and a scanner.

Abstract: False twisting device for producing crimped filamentary yarns by introducing the filament into a cylindrical hollow of a hollow spindle, winding it around a twisting pin mounted transversely in the cylindrical hollow and taking out the filament therefrom, wherein a center point of the minimum diameter portion of the twisting pin is displaced from a rotational center axis of the hollow spindle, both in the vertical and parallel directions as related to the axial line of the twisting pin respectively, so that the filament rotated together with the hollow spindle therein is positioned concentrically with the rotating center of the hollow spindle.Said hollow spindle is mounted in a housing and supported by air bearings and it is rotated by applying compressed air to turbine blades which is provided on the circumference of the cylindrical hollow.