Patent GB-1371166-A (GB)
Title: Treatment of textile thread or yarn materials
IPC: D06C29/00
Filed: 1972-05-23
Abstract: 1371166 Treating yarns; yarn delivery rollers HACOBA TEXTILSMASCHINEN GmbH & CO KG 23 May 1972 [22 June 1971 4 Nov 1971] 24234/72 Headings DID and DIF Apparatus for continuously treating e.g. shrinking, bulking, damping, loosening and/or fixing a yarn (or yarn forming material) by means of a heated gaseous and/or liquid treating agent under controlled conditions which may require an absence of turbulence and countercurrent and/or concurrent passages of yarn and agent, comprises a treatment chamber or tube provided with a yarn inlet duct, a feed pipe leading into it for the agent and outlets for the agent and the yarn, and a regulatable yarn delivery system upstream of the chamber and a downstream yarn advancing or winding device. The yarn delivery system comprises two delivery rollers rolling on one another, one or both of which is/are conical, and a thread guide adjacent to the line of contact of the rollers and displaceable parallel thereto. A U-guide tube is arranged at the lower end of the chamber together with a treatment tube (for the yarn to be drawn up above the upwardly directed outlet of the guide tube) supplied with suction and supply connections, the latter for treatment vapour or cold or hot air. As shown in Fig. 1, a treatment apparatus comprises a tube 3, having a yarn inlet duct 1 and supply pipe 2 for treating agent, into which yarn is led from supply package 5 through a brake 6 and delivery system 7. A perforated port of tube 3 is surrounded by a condenser 8 defining a space connected to a suction conduit 9. Yarn leaving tube 3 passes through a U-tube 10 thence through a treatment tube 11 connected by duct 12 to a heating element 13, wherein steam or hot air is produced, or directly to duct 14 through which such heating medium may be supplied, and by tube 15 to condenser 8 or conduit 9. Yarn Delivery. In the system 7, the speed of the yarn 4 is varied without slipping according to the point at which it passes through the rollers 7', 7", which are rotated at constant speed. The variation is necessary in order to avoid a constant filling of the chamber or tube, yarn breakages, formation of loops, and to ensure a constant yarn removal, uniformity of winding and/or yarn formation. As shown in Fig. 2, roller 7' is driven by a belt 16 or gear wheels (not shown) and roller 7" rests thereon under its own weight and is driven thereby, and a yarn guide 18 (mounted for displacement between limit stops 22, 23) on a rod 18' connected with a threaded spindle 19 determines the point of entry of yarn into the nip of the rollers, along line 7"'. Spindle 19 is constantly driven through gear drive 21 by a motor 20 which is reversed'(in polarity and direction of rotation) by a device (not shown) which corresponds to the pressure of agent passing into tube 3, and thus regulates filling thereof. In another embodiment of system 7, Fig. 3, a roller 26 is pressed against, and driven by a continuously motor-driven, rubber covered, conical roller 24; roller 24 and a yarn guide 27 are on a sliding carriage 28 which is displaced against the bias of a spring 30 on a guide rod 29 by a crank lever 32, one arm of which is connected to a lifting rod 33 operated by an electro-magnet 34. When filling of tube 3 is detected or if filling lessons, then the magnet 34 is actuated or deenergised in order to rock lever 32 about pivot 31 thus causing arm 32" to displace carriage 28 and thereby effect correction of yarn delivery speed or allowing spring 30 to restore the mechanism. In the embodiment of Fig. 4, also comprising conical rollers 7, 7", a yarn guide rotatably movable along the line 7"' to effect the corrective speed variation is carried by a lever 35 mounted on the shaft of, and operated by a rotary electro-magnet 36 responsive to filling conditions in the tube 3. Several forms of U-guide tube, treatment tube and chamber, and yarn storage tube are described with reference to Figs. 6-8, Figs. 9-17, Figs. 20-23 and Figs. 18, 19, (not shown).