Patent GB-1429619-A (GB)
Title: Textile machines
IPC: D01H11/00
Filed: 1974-06-27
Abstract: 1429619 End catchers; cleaning spinning machines TOYODA JIDOSHOKKI SEISAKUSHOKK and DAIWA BOSEKI KK 27 June 1974 [28 June 1973 24 July 1973 22 Nov 1973 4 Dec 1973] 28594/74 Headings DID and DIF [Also in Division F2] A connection between a displaceable pneumatic pipe 4 and a main pneumatic duct I of a textile machine, such as an open-end spinning machine or winding machine, is achieved by attaching a flexible skirt 3 to the edge of an aperture 2 extending along the entire length of the duct 1 and inserting the pipe 4 into the aperture in such a way that it is sandwiched between the skirt 3 and the lower edge portion 1a of the duct 1. Thus the pipe is free to move along the duct, the aperture 2 being continuously sealed by the skirt 3. The duct 1 extends along the length of the machine, one end thereof being closed and the other being connected to a blower to provide air suction to prevent airflow into the duct 1 through the space between the pipe 4 and the skirt 3 a sealing cover 5 is rigidly secured to the pipe 4 being in sliding contact with the duct 1. To assist in movement of the pipe and cover assembly, rollers 5a and 5b, both contacting the outer surface of the duct, are connected to the sealing cover 5. To allow smooth deformation of the skirt 3 rods 6a and 6b are secured, to the sealing cover 5, the pipe 4 being disposed midway between them, or alternatively a guide plate having an arched guide surface can be rigidly fixed to the pipe 4. The skirt 3 is preferably made of a material having heterodirectional properties, that is the material should have a greater flexibility lengthwise along the duct than transverse to the duct, this being achieved by the inclusion of ribs or grooves or directional fibres in the material. In an alternative embodiment, the skirt 3 may be formed of two separate skirts attached to two opposite edges of the duct 1 forming a central longitudinal slit for insertion of the pipe 4. The contact edges of the skirts may have either an upward flange, a thickened portion incorporating hollow tubes passing longitudinally through the edge or the two skirts may overlap. The spinning machine itself is provided with a doffing and donning apparatus utilizing a pneumatic main duct and a pair of suction ducts having pipe connections as above. An open-end spinning frame A is provided with a head stock B, each operation unit comprising a spinning unit 11, and a winding unit 12 provided with a split drum 13 and a cradle 14 which holds a bobbin 15 so that a yarn package 16 can rotatably contact the split drum 13, and a pair of draw-off rollers 17 and 18 which takes off a yarn 19 from the spinning unit 11. A sliver 20 is supplied to the spinning unit 11 from a supply can 21. A duct 1 is mounted along the length of the spinning machine at a position above the winding units and a suction blower 22 is disposed at a position above the head stock B and is connected to the end of the duct 1. A driving mechanism 23 is disposed above the blower 22 and a horizontal endless belt 24, driven by the mechanism 23 is disposed above the duct 1. The carrier member 26 is detachably engaged to the belt 24 by an engaging member 27 so that the carrier member 26 is capable of both displacement along the machine and of stopping temporarily in front of any winding or spinning unit. Member 27 is provided with a pin 28 for engaging the carrier member 26 with the belt 24 which is provided with a plurality of apertures, any one of which is capable of receiving the pin 28 being urged towards the belt 24 by a expansion spring 29.