US2048444A - Means for drawing-off slivers in combing and like machines used in the preparation of textile fibers for spinning - Google Patents

Description

July 21, 1936. P. J. GILLESPIE 2,048,444 MEANS FOR DRAWING-OFF SLIVERS IN COMBING AND LIKE MACHINES USED IN THE PREPARATION OF TEXTILE FIBERS FOR SPINNING Filed June 10, 1935 2 1% (fame 9Z2 fzfsp z'e,

Patented July 21, 1936 'UNl'iiE'D; sm es rATENroFFlIcE] 1"2-,04s. l44. y p p THE PREPARATION OF TEXTILE :FIBERS FQRxSB NING PercyJoseph' Gillespie, Golders Green,

- London, England Ap l ion-lune 10, 935, S rial :No. 25 910 ;I;n, Great-Britain June 1, 1934 2 Claims. (01. 19-115) This invention provides improved means for tained in close contact with the driving roller drawing-off slivers and for like operations in when passing round it. combing and like machines used in preparing The surfaces of the. rollers, whether fusiform textile fibres for spinning. or cylindrical, may in known manner be fluted 5 In wide combing machines, such as the French or scratch-fluted longitudinally or helically, or 5 combing machines, the means commonly used for otherwise roughened, or may be smooth. effecting a drawing-oh" operation comprise a pair The band in drawing-off means according to of fusiform rollers, one a driver and the other an the invention may be endlessly moulded or otheridler, of small maximum diameter relative to' wise made, for example, of rubber, with or withtheir length and set close to a comb, with a Wide, out reinforcement. 10 endless drawing-off band of leather running I may carry out my invention, for example, about the driving roller and at least one spaced without structural modification of an existing guide roller. machine by retaining the usual fusiform driving A disadvantage of the known means is that roller for the drawing-off band, and substituting the band in passing about the fusiform driving for the usual cylindrical band a band bellied in 15 o r iS Sleek a its edges even W d w g t manufacture from its edges to its middle in cona ts middle- Consequently, When the b pa s formity with the shape of the driving roller. The be the driving and idling Te adjacent peripheral length of the band decreases progresthe the aetieh 0f the machine Causes e sively from its middle to its edges, the amount of bands at the ow d e f the d v roller t0 the decrease at any plane being substantially be y d p forward betweenlthe rollers and equal to the difierence between the circumference t c and qu y catch p the teeth of the driving roller at that plane and the cirof the latter and su Sma hac cumference of the roller at its middle plane. These catch the fibres being combed, which eveil- Th t is to say, the peripheral length of the band 5 w y form slubs liable to become entangled in any plane is varied substantially according to 2;

the combed slivers with resultant disadvantage th formula in the subsequent spinning and weaving processes. Furthermore, in some combing machines, 7 upp and lower blades known as where la and 1m are the lengths of the band in at ciprocate upwards and w wa between the the plane in question and the middle plane reto comb and the rollers, y touching the band, spectively, and ds and (its are the diameters of the and these blades also tend to catch and rupture roner in the same planes. In practice, it has i y loose P Of the bend, particularly at the been ascertained that a band having a peripheredges thereof. Cutting out of the hacked or torn length of 23" t t middle and 221 at its edge Portions of the band has been practised edges operates satisfactorily in conjunction with hitherto for preventing slubs gathered by such a driving roller having a maximum diameter at portions from being drawn into the combed'slivits middle of 1" decreasing to '1/ at its end5 ers. Moreover, the ruptures in the band are lia- Fig, 1 is a perspective View of part of an existble to exte r p y and Consequently materialing combing machine to which the invention is 40 y Shorten the life of the bandapplied Without structural modification (the cur- 40 My present invention has for an Object to vature of the rollers being greatly exaggerated come the aforesaid disadvantages. for clarity). The usual fusiform driving roller a Accordingly, I provide, in combination with a is retained, and for the usual cylindrical band fusiform driving roller of drawing-off means in there is substituted a bandb bellied from its edges a wide combing machine, aband of leather, rub to its hh in eonfermlty With the ap Of 45 her or other material which is bellied in manue drlvlhg r011er- The J c ey roller c is also facture from its edges to its middle in conformity fuslform 1n colfrespondehce t e ap Of with the varying diameters of the driving roller. g 3 2233 5 g gfig gi fi fi figgg a 2 2 2::

under gi drawltlgmfi. means strained under the pressure of the springs on 50 n} l l t me cqmpnses m their bearings they ensure a sufficient and equal bmatlon, a pair of drlvlng and idler rollers and a pun over the Whole width of the band on the e? of leather rubber or other matenal, the fibers drawn from the comb e. The upper sword dnvms roller a d the d being t v y so ,f is shown in its lowermost position between the formed that the edges of the band are mainroller (1 and thecomb e and the figure indicates 55 how little clearance there is at the ends of the roller a, so that the least flapping of the edges of the band (which is eliminated by the invention) renders them liable to be cut and hacked by the swords.

Fig. 2 is a cross section of the band b and shows how it clings to the roller a at its edges on account of its special formation.

In a combing machine for preparing textile fibers for spinning, having drawing-off means according to the foregoing example, the possibility of the band being hacked or torn by flapping or running loosely at its edges and consequently being caught by parts of a machine is advantageously removed, thereby obviating the necessity for cutting out hacked or torn edge portions of the bands, and securing material lengthening of the useful life of the bands,

I claim:

1. Means for drawing oif slivers and for like operations in a wide combing machine, comprising, in combination, a fusiform driving roller, a co-operating idler roller, and a flexible band passing about said driving roller and between said driving and idler rollers, said band being bellied in manufacture from its edges to its middle in conformity with the varying diameters of the driving roller.

' 2. Means for drawing off slivers and for like operations in a wide combing machine, comprising, in combination, a fusiform driving roller, a co-operating idler roller, and an endlessly moulded rubber band passing about said driving roller and between said driving and idler rollers, said band being bellied in manufacture from its edges to its middle in conformity with the varying diameters of the driving roller.

PERCY JOSEPH GILLESPIE.

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