GB367182A - Improvements in and relating to methods of and machines for the manufacture of mixed yarn - Google Patents

Abstract

367,182. Spinning composite yarns. SOJKA, F., 14, Leopold Ernstgasse, Vienna. Feb. 23, 1931, No. 5646. [Classes 120 (ii) and 120 (iii).] A method for manu - facturing mixed yarn in which one or more fine spun yarns is added to one or more rovings within the drawing mechanism of an ordinary fine-spinning machine is characterized in that the roving passes from the intermediate to the front drawing rollers without passing through a yarn guide while the fine spun yarn, which only passes through the front pair of drawing rollers, passes through a yarn guide close to these rollers, the guides for the roving and the spun yarn being reciprocated in unison so that the fine spun yarn always overlaps the roving. The roving 8 passes through a guide hole 9 in the traverse rail 10, the back rollers 1, the intermediate rollers 2, and the front rollers 3. A stirrup-shaped member 11, connected to the traverse rail 10, passes under the rollers 1, 2 and projects upwardly through the gap between the constricted neck portions 25 of the rollers 2, 3. An arm 26 is adjustably secured by a screw 32 passing through a slot 31 to the member 11. The lower portions of the ends of the arm 26 hang down as flaps 27 over two rovings 8 and the upper portions 35 of these ends are bent backwards at an obtuse angle to the flaps 27. Each cut 36 in one of these ends receives a fine spun yarn 18 which passes from a bobbin 37 over an adjustable guide-bar 17 on its way to the nip of the front drawing rollers where it is mixed with a roving. Adjustment of the bar 17 regulates the contact of the fine spun yarn with the ends of the cut 36 and acts as a tensioning device. The arm 26 may be in two parts each adjustably secured to the member 11. In place of the cut 36 a hole may be provided in the portion 35 and another hole in the flap 27. In a modified form of the invention, a stirrup-shaped member is connected to the traverse rail and passes over the back and intermediate drawing rollers to project downwardly between the intermediate and front drawing rollers. One stirrup-shaped. member may be provided for each roving and it may be hinged to the traverse rail so that it may be swung out of position. A set screw is provided to adjust the yarn guide in a vertical plane. This form is particularly useful where, in addition to the usual cleaning rollers 5, 6, a cleaning roller is provided below the back and intermediate drawing rollers. In another modification, particularly suitable for smooth fine spun yarns, such as artificial silk, the yarn guide for the fine spun yarn consists of a round section wire formed in one piece with the stirrup-shaped member and having an open eye at its upper end. The fine spun yarn passes through this eye and then round the upper cleaning roller, the rough surface of which imparts to the smooth yarn a velocity equal to the peripheral velocity of the front drawing rollers. From the cleaning roller the fine spun yarn passes around the stem of the yarn guide and so into the nip of the drawing rollers where it mixes with the roving.