US2208174A - High draft mechanism for cotton flier and spinning frames - Google Patents

Description

July 16, 1940. J. WEINBERGER HIGH DRAFT MECHANISM FOR COTTON FLIER AND SPINNING FRAMES Filed March 2, 1938 Jan Mink/yer Patented July 16,1940 2,208,174

UNITED STATES PATENT} OFFICE HIGH DRAFT MECHANISM FOR GOT TON FLIER AND SPINNING Jan Weinberger, Brunn, Czechoslovakia, assignor of twenty-five per cent to St. George Textile Corporation, New York, N. Y., a corporation of New York Application March 2, 1938, Serial No. 193,589 In Czechoslovakia October 6, 1937 1 Claim. (01. 19-433 This invention relates to high draft mechaing bar of the frame through which the rovings nism for cotton flier and spinning frames. are fed with one end of the former constituting The primary object of the invention is to proan upright leg slotted at its upper end with parvide high draft mechanism for cotton flier and allel side walls for the slot that gather the 5 spinning frames wherein a silver passing through free running fibers at the opposite side edges of 5 the frame has the fibers constituting the embryo the sliver into the adjacent rectangular formaformation thereof gathered into a uniform sliver tion for the application of even draft to all of formation substantially rectangular in cross-secthe fibers of the slivers. tion whereby the sliver has an even pressure ex- It is a further object of the invention to proerted thereon by the front rollers of the drawvide a sliver former attachment for drawing 10 ing frame to cause all of the fibers composing frames of the foregoing character in the form the sliver to travel at exactly the same speed of a pair of adjustably connected angle mto produce a sliver issuing from the drawing bers having corresponding ends thereof attached frame in a substantially smooth and close conto opposite ends of the reciprocating sliver guide 5 dition, thereby eliminating all free running fibers bar of a drawing frame with a bar connecting l6 and a consequent rough surface. the other corresponding ends of the formers and In high draft flier and spinning frames, the from which bar a series of sliver formers rise. sliver when unguided in its movements through. A still further and important object of this the front or delivery draft rollers of a frame invention is to provide a sliver former attachhas fibers constituting the sliver bunched or ment for cotton flier and spinning frames, where- 20 closely gathered at the central longitudinal line in the embryo formation of a sliver is gathered thereof with the body of the sliver tapering off into a uniform sliver formation without in any towards opposite sides so that when the sliver manner condensing the sliver as by reduction in in such condition passes between the front or the normal cross-sectional area thereof.

delivery draft rollers of the drawing frame, pres- With the above and other objects in view that :5 sure is exerted on the sliver at the central lonwill become apparent as the nature of the ingitudinal line thereof with very little, if any, vention is better understood, the same consists pressure exerted on the side marginal edges of in the novel form, combination and arrangement the silver with the result that the passage of a of parts hereinafter more fully described, shown 80 sliver in such form through the front rollers the in the accompanying drawing, and claimed. :0

draft on the sliver at the central longitudinal In the drawing: axis causes the fibers at such point to move with Figure 1 is a cross-sectional view of the cotton greater Speed than the Speed of movement imflier or spinning frame showing the sliver former parted t0 e e marginal es of the Sliver, of sectional formation attached at one end to and said fibers at the marginal edges being fr cthe reciprocating bar of the frame and with the a tionally moved through the front rollers by their vsliver shaping d of the former positioned becontact with the fibers at the center of the sliver. tween the intermediate and f t rollers and in The present invention overcomes the foregoing proximity of the intermediate rollers, objections and provides an even draft of all of Figure 2 is a fragmentary top plan View sh0w w the fibers constituting the sliver by the provision mg a pair of sliver formers attached to a a of a sliver former that gathers the fibersftof tli; cipmcatmg bar embryo sliver formation immediately a er i passage through the intermediate rollers of the Flgure 3 is perspectwe View of the sliver frame for drawing the fibers into closer relationm ship with the closely related fibers constituting Flgules 4 and 5 are and fragthe sliver of uniform formation substantially plan Views respectlvely 0f e 0 6 fo rectangular in cross-section with such uniform mation of a sliver produced without the use of a formation of sliver passing through the front sliver former, rollers which exert an even pressure thereon for Figure 6 is an enlarged fragmentary elevational imparting an even draft to all of the fibers of view of the fiber gathering end of the sliver m the uniform formation, resulting in a smooth former showing the loose fibers of the sliver sliver. moved into a rectangular formation in cross-sec- More specifically, the high draft mechanism tion without condensing or compacting the fibers, for cotton flier and spinning frames includes a Figure 7 is a top plan view of the sliver form- 86 sliver former that is attached to the reciprocating end of the sliver former, and u Figure 8 is a perspective view of a battery of sliver formers.

Referring more in detail to the accompanying drawing, the high draft mechanism for the cotton flier and spinning frame, as illustrated in Figures 1 and 2, comprises a pair of entry rollers Ill and a pair of front rollers II that constitute the delivery'rollers of the frame and also for imparting draft to the sliver, a pair of intermediate rollers l2 being positioned between the entry and front rollers l0 and It, respectively, the intermediate rollers l2 imparting a preliminary draft to a sliver passing therebetween. The high draft frame is equipped with the'usual reciprocating bar I3 having openings 14 therein for the passage of the roving in its embryo sliver formation for directing the rovingbetween the several rollers of the frame.

In the absence of a sliver former as part of the high draft mechanism, the sliver passes be tween the rollers with the fibers thereof in a somewhat disassociated condition as indicated by the reference character IS in Figures 4 and 5, the fibers at the central longitudinal line of the sliver l5 being in close relationship as shown at It while the fibers I! at themarginal edge of the sliver are in a somewhat rough condition, with' the result that when such a sliver passes through the contact line of the front rollers ll, draft is imparted to the centrally positioned fibers l6 and practically the only draft imparted to the edge fibers l1 results from the frictional contact of such fibers II with the other fibers Hi. The

passage through the high draft frame of a sliver. of such formation results in a rough and uneven surfaced sliver by increase of draft at the central line of the sliver while the edge fibers l1 are free to run at will and remain unguided in their travel through the frame.

The present invention relates to a sliver forming attachment for a high draft frame, and as shown in Figure 3 this sliver former attachment comprises a pair of angle straps, each having a vertical leg l8 and 19, respectively, and a right angle base leg 20 and 2|, respectively that are overlapped and adjustably connected together by a pin and slot combination 22. The upper end of the leg I8 is provided with a transversely extending slotted opening 23 for the passage of a screw or other fastening device 24 for adjustably connecting the sliver former to the reciprocating bar l3, the upstanding leg IQ of the sliver former projecting upwardly between the intermediate rollers 12 and the front rollers II with the upper end of said leg 19 in closer-relationship to the intermediate rollers l2. As shown more clearly in Figures 3 and 6, the upper end of the leg I9 is provided with a longitudinally extending upper end opening slot 25 forming a pair of side arms 26 with the inner sides 21 of said arms 26 being arranged in parallelism, the lower end wall 28 of the slot 25 extending at right angles to the walls 21.

The roving 29 enters the high draft frame through the opening l4 in the reciprocating bar I3 and is fed through the high draft frame by the entry rollers ID, the intermediate rollers l2 rotating at a slightly increased speed relative to the entry roller I0 imparting a preliminary draft to the roving 29. The roving then passes through the slot 25 in the upper end of the sliver former leg 19 and the fibers of the roving are gathered together and moved into relatively close parallel relationship in the absence of any condensing activities or reduction in volume to produce a sliver 30 that is substantially rectangular in cross-section as shown in Figure 6 and the silver in this formation with free running fibers eliminated is delivered to the front or delivery draft rollers with increased draft imparted thereto relative to'the intermediate preliminary draft rollers l2. 'The sliver forming upper end of the leg I8 is in relatively close proximity to the intermediate rollers l2 so that when the forward ends of the fibers constituting the sliver have reached the contact line between the front rollers I I, the rear ends of said fibers have passed beyond the arms 26 of the sliver former, with the result that retardation or feeding of silver by frictional contact of the fibers thereof with the sliver former is eliminated, the distance between the upper end of the sliver former leg and the contact line between the front rollers being slightly greater than the staple of the material. By the adjustment 22 between the two sections of the sliver former} the leg l9 may be variably positioned between the intermediate and front rollers to take care of sliver staple of different lengths.

In known cotton spinning frames it has heretofore been possible to obtain a draft of only 1 to 6 from the entry to the front rollers to produce a satisfactory roving, but by the provision of a silver former of the type disclosed herein it is possible to increase'the draft by at least 1 to 11 or 1 to 12, so that the roving with such draft imparted thereto may be lengthened to a greater degree than has heretofore been possible with the result that by the use of this invention in the cotton spinning industry it is possible to eliminate one of the flier frames and still obtain the desired draft and lengthening of the roving.

In the form of invention shown in Figures 1 to 3 and 6-7 the sliver former is designed as a unit for association with a single passage opening of the reciprocating bar l3, but it is intended, as shown in Figure 8, to provide a battery of sliver formers, six of which are illustrated. The reciprocating bar l3 has attached to opposite ends thereof a: vertical leg l8 of a silver former as shown in Figure 3, while a longitudinal extending rod 3| connects the lower ends of the upright legs [9% The ends of the reciprocating bar 13 are provided with roving passage openings l4 that register with the sliver forming openings 25 at the upper ends of the legs IS. A series of legs l9 is attached at the lower ends as at 32 to the rod 3| and the upper end of each leg l9 is slotted as at 25', similar to the slot 25 in the leg l9 and each slot 25 registers with a roving passage opening M in the reciprocating bar l3. With such an arrangement it is possible to greatly simplify the sliver former construction.

While there is herein shown and described the preferred embodiment of the invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

1 claim:

In high draft mechanism for cotton flier and spinning frames, pairs of entry and front rollers, intermediate preliminary draft rollers, a reciprocating bar for guiding slivers through the frame and between the rollers, a pair of sliver formers carried by and movable with the reciprocating bar and each comprising a pair of angle members having base portions adjustably connected together, an upright leg carried by the base portion of one member extending upwardly between the intermediate and front rollers and in closer 76 proximity to the intermediate rollers, the upper end of said leg having an end opening slot therein with parallel side walls for gathering the fibers of the embryo formation into uniform sliver formation rectangular in cross section, the positioning of the upper sliver forming end of said leg in proximity of the intermediate rollers being such that the rear ends 0! the fibers that have traveled beyond said reciprocating guide bar at the time the front ends of the slivers are gripped in the contact line between the front rollers frictional influence on the side edges of the sliver is eliminated at the time of draft, an upright leg carried by the other base portion of each sliver former and connected atits upper end to said reciprocating bar, below the sliver guiding portions thereof, a longitudinally extending bar connected at its ends to thelower ends of the slotted legs of said pair oi'sliver formers. and a plurality of additional sliver formers carried by the longitudinally extending bar in spaced relation and each comprising an upright leg rigidly connected at its lower end to said longitudinally extending bar and having sliver forming openings in the upper ends thereof.

JAN WEINBERGER.

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