Patent GB-1225836-A (GB)
IPC: D01G21/00
Filed: 1968-05-07
Abstract: 1,225,836. Mixing fibres; drafting. IDEAL INDUSTRIES Inc. 7 May, 1968, No. 21483/ 68. Headings DID and D1F. Textile fibres of different drafting characteristics are blended by directing the fibres S through respective primary drafting units 80, the resultant webs W1-W4 being superposed and delivered to a common secondary drafting unit V, a progressively increasing drafting tension being applied to the webs K1-W4 by calendar rolls 24 in their course to the secondary drafting unit. As shown, slivers S of fibrous material pass to respective primary drafting units I, II, III, IV and issue therefrom in the form of respective flat thin webs Wl, W2, W3, W4. The latter are superimposed upon each other to form a web W5 which is passed through a secondary drafting unit V and is then condensed by means 67, 70 into a compound sliver S' which is coiled in a cam 25. Each drafting unit comprises four lower power-driven fluted rollers 31', 32', 33', 34' cooperating with respective idle upper rollers 31, 32, 33, 34. Each end of each lower roller is journalled in an anti-friction bearing comprising a reduced end portion 36 which is mounted in a bearing block 37 and an enlarged inner portion 40 having a diameter approximately equal to the pitch diameter of the corresponding bottom roller. Each end of each upper roller is journalled in an anti-friction bearing having a reduced end portion 41 freely received in block 37 and an enlarged inner portion 42 surrounded by a thin detachable sleeve 43 which engages portion 40 to determine the extent of intermeshing of the flutes. A spring- loaded plunger 98 bears downwardly upon sleeve 43. The diameter of sleeve 43 at the intake rollers 31 of the four primary units is such that when the slivers S are passing between the rollers 31, 31', sleeve 43 does not engage portion 40. It is stated that the rollers 31 to 33 and 31' to 33' of the primary units and all the rollers of the secondary unit may be smooth. The output rollers 34' of the four primary units are interconnected by a driven shaft 50. Each roller 34' of the primary units is coupled by a train of adjustable gearing to a pinion 87 rigid with roller 32', and the latter is coupled by respective trains of adjustable gearing to pinions 96 and 97 rigid with rollers 33' and 31' respectively. The output roller 34' of the secondary unit V is coupled to a motor is coupled by respective trains of adjustable gearing to roller 32', while the latter is coupled by respective chains of adjustable gearing to rollers 31' and 33' of unit V. The input roller 31' of unit V is coupled via gearing 63, a chain 62 and gearing 56 to shaft 50. The webs W1 and W4 are placed by respective guides 20 in inverted position, and in superimposed relation to one another, upon a table 100, and are fed thereupon by pairs of fluted rollers 102, the lower rollers of which are coupled by respective gearing 130 to a shaft 125 which is coupled by gearing 126 to shaft 50. The compound web W5 is advanced into unit V by fluted rollers 121 driven by a chain 134 from the lower roller of the adjacent pair 102. The condensing means 70 is driven via gearing 76 from motor 65.