Barmag Ag

Klaus Gerhards

Klaus Burkhardt

Erich Lenk

Hans-Peter Berger

Manfred Greb

Donald J Dobbins

Horst Beifuss

Winfried Wubken

Rainer Keuth

Frank Backer

Hans-Peter Eck

An apparatus and a method of stuffer box crimping a synthetic multifilament yarn, wherein the yarn is advanced in a conveying nozzle by means of a heated conveying gas into a stuffer box and compressed to a yarn plug. At the outlet of the stuffer box, a pair of rolls form a conveying gap for advancing the yarn plug and which has a width smaller than the cross section of the plug leaving the stuffer box so as to compress the yarn plug. The internal passage of the stuffer box is constructed with a cross section that increases in the direction of advance in such a manner that no significant cohesive force develops on the yarn plug, and the resistance to the forward pressure in the yarn plug resulting from the heated conveying gas is provided essentially only by the force on the yarn plug generated by its compression in the conveying gap.

Apparatus and method for stuffer box crimping a synthetic yarn

A yarn winding bobbin having a tubular wall and which includes a yarn catching slot so that the bobbin is able to catch a continuously advancing yarn during a bobbin changing operation on a continuous winding machine. The yarn catching slot is configured to catch the yarn as the yarn and surface of the bobbin move in the same direction, and it includes a tongue for initially engaging the yarn and a clamping slot into which the yarn is guided by the tongue.

Yarn winding bobbin

An apparatus and method for the production of a multicomponent yarn which is composed of several multifilament strands with differing characteristics, such as color. The individual strands are drawn in parallel and simultaneously by a pair of godets following spinning, and then crimped by compression in an air jet crimping device. According to the invention, the individual strands are spread apart from one another prior to run-off from the drawing godet in such a way that the distance in the axial direction between the run-off points of the individual strands on the godet surface is increased. This spreading of the strands assures that the strands do not intermix prior to entering the air jet crimping device.

Apparatus and method for the production of a multicomponent yarn

An apparatus for stuffer box crimping synthetic filament yarns is disclosed, which includes an air nozzle for pulling in and advancing multi-filament yarns at a high speed, and a downstream stuffer box in which the gaseous transport fluid is separated and the yarn is compressed to a compact yarn plug. To increase the production speed and production reliability, the speed at which the yarn is advanced through the air nozzle, and the yarn tension which is produced by the air nozzle is increased. This occurs in accordance with the invention in that the duct for the common advance of the yarn and the transport fluid is configured such that the flow duct narrows in the shape of a nozzle in a first segment down to a restriction at which the outflowing transport fluid reaches the speed of sound, and the duct then widens in a second segment at a small angle of opening.

Apparatus and method for stuffer box crimping synthetic filament yarns

An apparatus for forming a blended yarn from a plurality of yarn strands is disclosed, and wherein the yarns are advanced to contact the surface of a feed roll in a side by side arrangement. A guide roll for each of the yarn strands is positioned upstream of the feed roll, and one or more of the guide rolls has a circumferential configuration which serves to repeatedly move the advancing yarn strands relative to each other so that the strands laterally cross each other on the surface of the feed roll in a predetermined pattern.

Apparatus and method for blending yarn strands

A method and apparatus for producing multi-colored crimped yarns is disclosed, and which includes the steps of spinning a plurality of differently colored groups of filaments, subjecting the filaments of each group to a treatment liquid, and then combining the filaments to form respective strands. Each strand is then subjected to an air tangling process, then stretched and the strands are thereafter combined in a thermo-pneumatic texturizing process. This processing sequence produces multi-filament yarns with good color blending.

Method and apparatus for combining differently colored threads into a

A yarn texturing apparatus is disclosed which includes a nozzle having a yarn duct therethrough, and a perforated stuffer box at the outlet end of the duct. Heated air is introduced into the duct, and the air is heated by a heater which is positioned in the air supply line leading to the nozzle. The output of the heater is controlled by a temperature sensor which is positioned inside the stuffer box. Also, the nozzle comprises two confronting sections which can be separated to facilitate yarn thread-up, and a valve is provided in the supply line to divert the heated air to an exhaust line when the nozzle is opened. A second temperature sensor is positioned in the supply line and is operative when the nozzle is opened to regulate the output of the heater and avoid large fluctuations of its output. In a further embodiment, the heater is controlled by a circuit which stores the signal from the temperature sensor in the stuffer box, and this stored signal is utilized to control the heater when the nozzle is opened.

Yarn texturing apparatus with heat sensor in stuffer box to control heat

A yarn texturizing nozzle and method of thread-up of the nozzle are disclosed, and wherein the temperature of the nozzle remains substantially unchanged during yarn thread-up. The nozzle includes a body member having a yarn passageway extending therethrough, and the passageway is adapted to be laterally opened to permit the lateral insertion of the yarn during thread-up. Means are provided for supplying a heated treatment fluid such as air to the passageway, and control means are provided for maintaining the mass flow rate of the air substantially the same during yarn thread-up as when the passageway is closed during normal yarn processing.

Method of threading a yarn processing nozzle

A yarn texturing nozzle is disclosed which comprises a yarn feeding inlet portion wherein a yarn is subjected to a heated and pressurized treatment fluid to heat the yarn and also advance the yarn therethrough. The nozzle also includes a stuffer box located downstream of the inlet portion. The inlet portion comprises a rectangular block which is divided into two parts along a plane extending coaxially through the yarn passageway to facilitate yarn threadup, and the stuffer box includes a slot through the side wall thereof which further facilitates yarn threadup.

Growing community of inventors

Huckeswagen, Germany

Klaus Gerhards