Patent GB-1076758-A (GB)
Title: Cross-winding machine
IPC: B65H59/00
Filed: 1964-08-04
Abstract: 1,076,758. Winding threads. W. REINERS. Aug. 4, 1964 [July 22, 1963 (2)], No. 30684/64. Headings DID and D1J. To increase adhesion friction whilst the first layers of thread are wound onto a tube, the thread tension is briefly increased only during the commencement of the winding. In Fig. 1, the traversing drum 6 drives the take-up-spool 7. On depressing a switch-on lever 14 the drive to the drum 6 is brought into operation and, at the same time, this downward movement of the lever 14 causes linkages 12, 10, 9, 15 and 17 to deflect an arm 19 in a manner increasing the pressure of a spring 21 in a plate yarn brake 5. After the return of the lever 14 to its upper setting a damping device 20 maintains the increased pressure on the brake 5 for a predetermined period. In a modified construction, Fig. 2 (not shown), the spool frame 8 carrying the take-up spool 7 carries a magnet 23 the magnetic field of which acts on a magnetisable part 24 of the machine frame whilst the spool 7 is empty to increase the pressure between the spool 7 and the drum 6 during the first layers of winding. As the diameter of the package on the spool 7 increases the frame 8 rocks the magnet 23 away from the part 24 of the machine frame and the force exerted by the magnet is rapidly diminished. In this modified construction the thread also passes through a plate yarn brake 5 and under two spaced thread guide means 4 arranged between the brake 5 and the drum 6. A rod 25 connects one arm of a doublearmed lever 26 to the frame 8 and the other arm of the double-armed lever 26 deflects the thread between the thread guide means 4 whilst the frame 8 is in its lowermost setting as determined by the spool 7 and the first few layers of thread thereon. This initial deflection of the thread between the guide means 4 serves to briefly increase the thread tension. Doffing. In a further construction, Fig. 3 (not shown), the additional thread-tensioning means are controlled by an automatic take-up spool changing system. In Fig. 3 the drum 6 drives the package 121 and when the package reaches a predetermined diameter cams, links, springs and a slipping clutch drive causes arms 168 to move towards the package 121 to cause horns 172 to slide under and support the package. The horns 172 also strike bolts on arms 163 to cause arms 163 to rotate to a setting in which they release package spindle holding means. The arms 168 then move to the right to place the doffed package on carrier 180. When the fully wound package 121 has been removed from the arms 8 they drop to a lower setting indicated at T and the magazine 155 swings downwardly to place a fresh spool in line with the axis of rotation of the arms 163. The downward movement of the magazine 155 causes a screw 158 to strike a pawl 159 in a manner causing it to release its engagement with the spring biassed arms 163 that then rotate under the influence of springs 166 to a setting in which they lock onto the ends of the near spool. When the magazine is raised the newly locked-in-position spool is forced to leave the magazine 155, a spring biassed lid 156 thereon retaining the remaining spools in the magazine. When the fresh bobbin is in position cam means cause a friction roller 125 to move to a setting where it connects a driving roller 116 with the thread guide drum 6 to start the next winding operation. This fresh winding causes the thread extending between the new and old bobbins to break. During the initial stage of the winding cam and link means cause a yarn brake 5 to apply extra pressure to the thread F and further cam means causes the new take up spool to be pressed with increased pressure against the guide drum 6.