Patent GB-1143966-A (GB)
Title: Improvements in or relating to break-spinning apparatus
IPC: D01H4/00
Filed: 1966-03-24
Abstract: 1,143,966. Break - spinning apparatus. MAREMONT CORP. 24 March, 1966 [24 March, 1965], No. 13124/66. Heading D1D. In break-spinning apparatus, fibres are detached from a sliver by a device brought intermittently into contact with it. In Figs. 2. 3 sliver is fed by rotating rollers 22, 23 to a roller 20 rotatable in fixed supports. With this roller a roller 15 is arranged, as described below, to make intermittent and frequent contact so that fibres are intermittently detached from the sliver. The roller 15 has slots through which air is drawn to the interior of the roller; it also rotates slowly so that the fibres adhering to it are carried around to a point where the roller is engaged by a further roller 25. At this point, at the start of an operation, a length of spun yarn extending from the nip of two rotating rollers 28, 29 is laid in contact with the fibres. This nip lies on an axis about which the rollers 15, 25 rotate as a unit so that their point of engagement describes a path about this axis and the fibres are twisted into yarn which is continuously withdrawn by the rollers 28, 29. To provide for the bodily rotation of the rollers 15, 25 and the intermittent contact of roller 15 with roller 20, the rollers 15 25 are mounted on axes parallel with one another and with the axis of roller 20 at right angles to the inclined face of a head 36 on a rotating hollow shaft 35; to provide for the slow axial rotation of the roller 15 it has a bevel-gear 37 engaging another on the end of a shaft 30 within the hollow shaft. The hollow shaft is rotated at high speed, and the shaft within it at a few r.p.m. more. To provide for air suction at the slots, the roller 15 has a hollow space communicating with the space between the two shafts, which itself communicates with a source of reduced pressure. The shaft of roller 25 is pivoted to the head so that it may be moved off the roller 15. In another form, Fig. 11, the incoming sliver is intermittently nipped against a roller 16 by that part of an endless apertured apron 55 lying on a cradle 71 to which suction air is admitted. The apron is constrained to form one-half of a fast-rotating cylindrical surface, the other half being formed by a member which is recessed so that it does not nip the sliver. The apron is constrained by a cradle and two rollers which are slowly rotated to advance the apron so that the fibres are carried around to a point where it is engaged by a roller 81 mounted eccentrically of the rotational axis of the surface. On this axis lies the nip of two rotating withdrawing- rollers so that as the surface rotates, the roller describes a path around the axis, and the fibres are twisted into yarn which is withdrawn over a guide. In Fig. 16, the sliver is nipped intermittently between the face of a disc 102 and a roller 120. The disc rotates slowly about axis A and moves bodily and rapidly in a path around an axis 0 so that it intermittently moves out of contact with the roller. The disc has air slots 104; moving with it about the axis 0 is a roller 118 by which the fibres are taken off as yarn. To rotate the disc, circumferential teeth on it successively mesh teeth on a disc 109 rotating at high speed about the axis 0. For the eccentric movement of the disc it is carried by an axle 114 secured to a third disc rotating at a slightly different speed from the disc 109 about the axis 0. The roller 118 is secured to the axle. In Fig. 17, the fibres are deposited centrifugally and or by air-suction generated centrifugally on the inside of a slotted ring 140 lying within a second slotted ring canted on a shaft 132. To advance the ring 140 it has gear teeth meshing a gear 152 on a shaft 134 driven at a slightly different speed from shaft 132. Spaced from the rotational axis of the discs is a fibre-detaching roller 146 and a yarn-take-off roller 144, the latter being fixed to ring 140, and a yarn-guide 154.