US3145431A

US3145431A - Means for controlling the fibers in a strand of a textile drafting apparatus

Info

Publication number: US3145431A
Application number: US63039A
Authority: US
Inventors: Rulon-Miller Robert; Warner H Tabor
Original assignee: DIXIE MACHINE AND TOOL CO
Current assignee: DIXIE MACHINE AND TOOL CO
Priority date: 1960-10-17
Filing date: 1960-10-17
Publication date: 1964-08-25
Anticipated expiration: 1981-08-25

Description

Aug. 25, 1 4 RQRULON-MILLER ETAL 31 MEANS FOR CONTRO NG THE T ERS IN A STRAND OF A TEXT DRAFTI APPARATUS Filed Oct. 17. 1960 2 Sheets-Sheet 1 INVENTORS ROBERT RULON-MILLER F G 2 NARNER H. TABOR ATTORNEYS,

Aug. 25, 1964 R. RULON-MILLER ETAL 3,145,431

MEANS FOR CONTROLLING THE FIBERS IN A STRAND OF A TEXTILE DRAFTING APPARATUS Filed Oct. 17, 1960 2 Sheets-Sheet 2 as I 37 INVENTOR.

ROBERT RULON-MILLER I WARNER H. TABOR i F l G. 6 BY ATTORNEYS United States Patent ice MEANS FOR CONTROLLING THE FIBERS IN A.

STRAND BF A TEXTILE DRAFTING ARPARATUS Robert Raina-Miller and Warner H. Tabor, Bristol, R.I., assignors, by mesne assignments, to Dixie Machine & Tool Company, Greensboro, N.C., a corporation of North Carolina Filed Oct. 17, 1960, Ser. No. 63,039 4 Claims. (61. 19 -247) This invention relates to a drafting apparatus such as is used for drawing a textile strand.

In a textile drawing apparatus, as a strand is attenuated, fibers of the strand tend to extend outwardly from the axis of the strand rather than extending along the axis of the strand and it is desirable to maintain these fibers in the strand extending along its axis and to control them in this position as the strand is attenuated between the back and the front rolls.

In order to control the fibers of a strand aprons are sometimes used presenting a straight run so that the strand extends between two aprons and is engaged for a longer extent of its travel between the back and front pairs of rolls. However, it is known that at times such belts drive ahead and separate so that the belt is spaced from and does not engage the strand between the belts as is desired.

One of the objects of this invention is to provide an arrangement which will prevent buckling of a stretch of belt which is intended to engage the strand throughout its straight stretch.

Another object of this invention is to provide a rigid support for the strand to slide along in order that a control may be had of its fibers.

Another object of the invention is to utilize a plate as a substitute for one of the belts preferably the lower belt in a drafting apparatus using the belt system.

Another object of the invention is to shape the plate so as to assist in preventing the fibers of the strand from extending outwardly.

With these and other objects in view, the invention consists of certain novel features of construction as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

FIGURE 1 is a sectional view of a fragmental portion of a spinning apparatus showing the relation of the back and front pairs of rolls with the intermediate control for the fibers between them;

FIGURE 2 is a top plan view of the fragmental portion of the drawing apparatus showing the parts which enter into the consideration of this invention;

FIGURE 3 is a sectional view of a modified arrangement of belt and plate;

FIGURE 4 is a plan view with parts omitted; and

FIGURES 5 and 6 are sectional views of fragmental portions on a larger scale.

In proceeding with this invention we have substituted for a lower belt a bracket carrying a plate which will extend along the line of travel between the nip of the back and nip of the front pairs of rolls in a drafting apparatus and provided a belt which will have one stretch running parallel to and in close adjacency to this plate so that the strand as it passes from the back pair of rolls to the front pair of rolls will pass between the belt and the plate and be controlled thereby. In some cases the plate may be grooved in a manner to condense the strand as it advances therein.

With reference to the drawings 10 designates a fragmental portion of a roll stand for supporting the lower front roll 11 and the lower back roll 12 of the apparatus. The back upper roll 13 has its shaft 14 bearing in cap 3,145,431 Patented Aug. 25-, 1964 bars having slots 15 while each pair of front upper rolls 16 has their shaft 17 supported in a bearing in a saddle.

designated generally 18 and comprising a front part 19 in which the bearing is located and a back part 20 so as to apply pressure on the rolls through a stirrup and weighting mechanism not shown. A shaft 21 also supported in the roll stand extends the length of the machine or from roll stand to roll stand where the shafts 21 are keyed together at their ends for driving the length of the frame.

A bracket 22 is supported on a rod 23 which forms a part of the roll stand or frame of the drafting apparatus and extends forwardly by means of a rib-like portion 24 to be supported on the bar 25 also extending lengthwise of the apparatus or from roll stand to roll stand. A plate 26 is supported by this rib-like structure 24 and is substantially the width of a cot or roll. The plate is at such a height that it is in a position to support a strand which leaves the nip of the back pair of rolls 12 and 13 for extending to the nip of the front pair of rolls 11 and 16.

A roll 27 is supported in a cap bar by means of its shaft 29 and is driven by means of gear 31 on shaft 29 meshing with gear 30 on lower-shaft 21 which is driven from one end of the frame. Belt 32 extends about this roll 27 and also about the nose bar 34 so as to provide a stretch 33 of belt parallel to and closely adjacent the plate 26 so that when a strand extends between the nip of the back pair of rolls and the nip of the front pair of rolls, it will be engaged by the belt and the plate so as to prevent the fraying or extending outwardly of its fibers as it is attenuated or drawn to a smaller size.

In the showing in FIGURES 3 to 6 inclusive, the bottom plate now designated as 36 is provided with a tapered groove 37 which is largest at the rear edge of the plate and of about five-eighths of an inch in width, While it is about one-eighth of an inch wide at the front edge of the plate which is its narrowest portion. This groove is arcuate in form, something after the manner shown in FIGURE 6, and this arcuate form extends throughout its length. The purpose of this tapered groove is to receive the strand and act as a condenser for forcing the fibers of the strand toward the center of the strand so as to maintain the fibers in a more desired compact relation as the drafting takes place.

A roll 38 is provided on shaft 29 which is of a much narrower width than the roll 27 shown in FIGURES 1 and 2, it being substantially one-quarter of an inch in axial dimension and substantially the same dimension as the belt 39 which passes about this roll. The front bar 40 about which the belt also extends is provided with a rounded projection 41 (see particularly FIGURE 6) which extends forwardly as shown in FIGURE 6 and also downwardly as at 42 as shown in FIGURE 5, and this nose portion is narrower than the width of the belt. Thus it serves to curve the belt as the belt moves forwardly, curving the belt downwardly into the groove 37 at its forward edge and also curving the belt as it extends upwardly around the bar as can be seen in FIGURE 4. This belt is also curved as it extends around the roll 38 by reason of the arching of the surface of the roll as there seen. Thus the belt in response to the arcuate shape of the surface of the roller and the

projection

41, 42 extends into the groove 37 so as to contact the strand as it advances along the groove and maintains control of the fibers substantially throughout the entire length of the belt. The drive of the belt is substantially the same as in the heretofore described showings in FIGURES 1 and 2.

We claim:

1. In a drafting apparatus for textile strands a pair of front rolls, means back of said pair of rolls for controlling a strand as it approaches said rolls comprising a relativeiy rigid plate presenting a surface to be contacted by the textile strand, an additional roll directly above said plate, means for applying pressure through said additional roll to the strand to provide an area of nip between the additional roll and the plate for attenuating the strand, and a belt extending about said additional roll extending toward said front rolls and means to guide said belt to present a surface of a stretch thereof parallel to and in close proximity to the surface of the plate for controlling fibers of the strand as it passes between the said surfaces.

2. In a drafting apparatus for textile strands, a pair of front rolls, rneans back of said pair of rolls for controlling a strand as it approaches said rolls comprising a relatively rigid plate presenting a surface to be contacted by the textile strand said plate being provided with a groove for receiving the strand, an additional roll above said plate through which pressure is applied to the strand to provide an area of nip for attenuating the strand, and a belt extending about said additional roll extending toward said front rolls and means to guide said belt to present a surface of a stretch thereof par allel to and in close proximity to the surface of the plate, said additional roll being arched outwardly to urge the mid portion of the belt into the groove for controlling fibers of the strand as it passes between the said surfaces.

3. In a drafting apparatus for textile strands a pair of front rolls, means back of said pair of rolls for controlling a strand as it approaches said rolls comprising a relatively rigid plate presenting a surface to be directly contacted b ythe textile strand said plate being provided with a groove for receiving the strand, which groove is tapered widthwise between its ends with its narrowest width at the forward end of the plate and means between the ends of the groove to urge and maintain the strand Within said groove.

4. In a drafting apparatus as in claim 3 wherein said last means comprises an additional roll which is arched outwardly to urge the mid portion of the strand into the groove.

References Cited in the file of this patent UNITED STATES PATENTS 5,434 Pratt Feb. 8, 1848 1,254,391 Casablaucas Jan. 22, 1918 1,444,658 Butler Feb. 6, 1923 1,448,191. Butler Mar. 13, 1923 1,494,991 Casablancas May 20, 1924 2,231,526 Casablancas Feb. 11, 1941 2,348,202 Beswick May 9, 1944 2,498,364 Fraser Feb. 21, 1950 2,595,918 Bird May 6, 1952 2,774,995 Sandelin Dec. 25, 1956 2,938,241 Guimbretiere et al May 31, 1960 FOREIGN PATENTS 745,432 Germany Apr. 19, 1944 16,024 Great'Britain of 1892 104,818 Great Britain Mar. 22, 1917 304,757 Great Britain Dec. 12, 1929 336,299 1959 Switzerland Mar. 31,

Claims

1. IN A DRAFTING APPARATUS FOR TEXTILE STRANDS A PAIR OF FRONT ROLLS, MEANS BACK OF SAID PAIR OF ROLLS FOR CONTROLLING A STRAND AS IT APPROACHES SAID ROLLS COMPRISING A RELATIVELY RIGID PLATE PRESENTING A SURFACE TO BE CONTACTED BY THE TEXTILE STRAND, AN ADDITIONAL ROLL DIRECTLY ABOVE SAID PLATE, MEANS FOR APPLYING PRESSURE THROUGH SAID ADDITIONAL ROLL TO THE STRAND TO PROVIDE AN AREA OF NIP BETWEEN THE ADDITIONAL ROLL AND THE PLATE FOR ATTENUATING THE STRAND, AND A BELT EXTENDING ABOUT SAID ADDITIONAL ROLL