US2091822A

US2091822A - Drawing frame for spinning machines

Info

Publication number: US2091822A
Application number: US586662A
Authority: US
Inventors: Krafft Fritz
Original assignee: ELIZABETH KYM
Current assignee: ELIZABETH KYM
Priority date: 1929-05-21
Filing date: 1932-01-14
Publication date: 1937-08-31
Anticipated expiration: 1954-08-31

Description

Aug. 31, 1937.

F. KRAFFT DRAWING FRAME FOR SPINNING MACHINES Filed Jan. 14,1952 2 Sheets-Sheet 1 it Patented Aug. 31, 1937 t I 2,091,822

UNITED sTArEsgrATENT oFFlcl:

DRAWING FRAME FOR SPINNING MACHINES Fritz Krafit, St. Blasien, Germany, assignor to Anna Kym-Krafit and Elizabeth Kym, both of Schopfheim in Baden, Wiesenthal, Germany Application January 14, 1932, Serial No. 586,662

In Gelnlany May The present invention relates to a drawing The'invention is illustrated by way of example frame for spinning machines such as ring spinin the accompanying drawings, wherein:- nir g machines and mules, and particularly resides Figure 1 shows a vertical section'of a device therein that in the main draft field, and followaccording t e Present inventioning a positive nipping point there is provided a vFigure 2 is a P Of t lower portion of a y elding drawing device at such a short distance device according to Figure 1 after removal of the from the stationary nipping point that the dispp p v tance between the positive nipping point and the F g e 3 Shows a portion f Figure 1 with yielding drawing aggregate device is less than d t la the length of the staple to be operated upon. Figure 4 iS a w Of the rollers 76, i in Figure 3 10 The invention further relates to the particular en m the right, d construction and arrangement of the feed de- Figure 5 iS a cross Section Of two Tellersvice. Further, the invention particularly resides v the drawings a is a trough of w ch the Point therein that the yielding aggregate i 0 111 extends some distance upwardly. b is a ribbed 15 structed that the free distance between the posi- Teller driven from the m drive d O wh ch 15 tive nipping point and the point. which is subthe Shape Conforms with the trough up to t jected to yielding pressure varies during the qpoutlet point m; The trough is provided with side oration,wherebythe'lower portion of the yielding cheeks 2 which embrace the bb d roller 17 drawing aggregate is preferably fitted; ith p from the sides so that the material cannot be 20 lee ing edges or ribs, which may also b corru, v pressed out laterally. c is a roller provided with 20 gated. These projecting edges may, for example, htly C mbtoothed ribs 01 which P- be formed by a rotary polygon of which th edges erate with an endless leather band d passing over may also'be so constructed that in the operating a I which is driven d p y 0n th field transversely to the direction of operation movement of the roller 9 and v de e ers I they deviate from a continuous straight line in Q 92, and which is caused to P as far as 1 that for example they are constructed spirally, are Sihle around the roller f y further pl r h of located at an angle relatively to one another or u t i and k indieete a front p of rollers the like. The yielding pressure device may prefarranged Very 01058 to the rollers f, the erably be made variable in tension. Further, it tame being less than inch preferably less 3 may be so constructed that it can be disposed than its inch as Shown 1111 the d w s- T e ore or less around the polygon. Pr f r l t roller k is formed of rubber covered with leather. yielding pressure device of the yielding aggregate is an pp n a lower weed clearer roller P is driven positively, for example by the drive of v d d w a p v n In front of t the portion of this pressure aggregate which does front roller p k, i is provided a p e guidnot yield. The upper and lower rollers. of the ing device (Figures 3 and consisting of wo 35 front roller pair may preferably be approached parts 1. 02 which are y means of guiding so closely to the upper and lower portion of the

faces

04, 5, 03, adapt to guide the fibers t0 8 yielding aggregate that any adherin or floating point of the line of contact between the rollers threads are removed from the yielding aggregate. k and These members at h ends of h r l rs Guide members may also be provided between f, 76 conform with the periphery these the yielding aggregate and the from; roller pair rollers and are then reduced from the ends of which are capable of guiding the loose or fl ati g the rollers O, f towards the middle Of the 11118 Of fibres towards th middle of the m, roller Pam contact between the rollers k, i, in such a manthese guide members preferably leaving between net that they are here directed .towards f them a small free space. .These guide members other by means of a Small Somewhat ,tnangular may at their ends be made to conform with the surface 03 extending parallel to the direction of periphery of the drawing roller or the like which the thread whilst leavmg Satan slot The surrounds them. The pressure roller of the front p between the two miners 1S capable of roller pair may Preferably be surrounded by a kiwlpg thre.ad to pass q 15 a weight loaded ten- 61 ding mass and be provided with an intern 1 slomng device for the roller g1; and thus for the a leather band (i. r is a tensioning device for the bush which the point through wmch ethe upper roller k of'the front roller pair. The path thread Passes hes a Slight. e ei e of the material is indicated by the broken line 8 yielding ma may for example ehhsist of rubber and the arrows. The roller 11 is adapted to fit which is covered with leather. into the trough a in such a manner that the ma.-

, 20 c approach the point 111.

Adjacent the guide roller 92 are shown arrows which are curv d around the centre of the ribbed roller b. These arrows are adapted to .indicate that the guide roller m is capable of adjustment 15 along such an arc. In this manner there is obtained that the leather band d can bear for different distances against the roller 0.

the roller 572 is lowered the more closely will the nipping point between the band (I and the roller The distance between the point a1 and the first contact point between 1. In a drawing frame for spinning machines in a main drawing field an aggregate adapted yielding drawing aggregate.

2. In a drawing frame according to claim 16, wherein the trough-shaped receiving device has periphery .of the feed roller.

3. In a drawing frame according to claim 16, wherein the trough-shaped receiving device has extends tangentially to the periphery of the said roller.

5. In a drawing frame according to claim 1, the aggregate producing'a positive nipping consisting of a trough-shaped receiving device in combination with a rotary feed roller, and extensions on 'thesaid receiving device adapted to partly enclose the said feed roller at its end surfaces.

6. In a drawing frame according to claim 1, the

7. In a drawing frame according to claim 1, the construction of the yielding aggregate as a rigid ers around which said band is passed.

. In a drawing frame according to claim 1, the

construction of the yielding aggregate as a nontion to a larger or smaller extent.

10. In a drawing frame according to claim 1,

' in position relatively to the said lower roller.

4 12. In a drawing frame according to claim 1. the construction of the yielding aggregate as a positive nipping aggregate is less than the length of staple to be operated upon, and a front roller pair located behind the yielding drawing aggregate in the direction of operation, said front roller pair being arranged so closely to the upper and lower portion of the yielding aggregate that it is capable of taking-up, adhering and floating fibers from the yielding aggregate.

i i. In a drawing frame for spinning machines, an aggregate in a main drawing zone which is adapted to produce a positive nipping at a nipping point, a yielding drawing aggregate located. behind the first mentioned aggregate in the direction of operation at such a distance therefrom that the distance between a clamping point of the yielding aggregate nd the clamping point of the positive clamping aggregate is less than the length of staple to be operated upon, a front roller pair located behind the yielding aggregate in the direction of operation, said front roller pair consisting of upper and lower rollers, of which the upper roller is surrounded by a yield- .ing mass such as soft rubber and at the point at which the fibres pass is provided with a slight enlargement.

15. In a drawing frame according to claim 14, a cover of leather around the yielding mass.

16. In a drawing frame for spinning machines, in a ,main drawing field an aggregate adapted to effect a positive nipping at a nipping point, a yielding drawing aggregate located in the direction of operation behind the first mentioned aggregate at such a distance that the distance of one nipping point of the yielding aggregate from the nipping point of the positive nipping aggregate is less than that of the length of staple to be operated upon, the aggregate producing a positive nipping consisting of a trough-shaped receiving'device in combination with a rotary feed roller, the yielding drawing aggregate containing a rotating part adapted to constantly vary the said distance during the working of the yielding drawing aggregate.

1'7. In a drawing frame, according to claim 1 the aggregate producing a positive nipping consisting in a trough-shaped receiving device in combination with a rotary feed roller, said device having an extension on which the material to be treated leaves said device, the other aggregate comprising a lower roller, and said extension lying substantially lower than the upper portion of the said lower roller.

18. In a drawing frame according to claim 14, around said yielding mass a cover of heavier consistence than soft rubber.

19. In a drawing frame according to claim. 1, said drawing aggregate having a lower portion and an upper portion, the aggregate producing the positive nipping being formed as a troughshaped receiving device and a rotary speed roller and a bearing for the last mentioned aggregate at'such a low position that the lower portion of the yielding aggregate can engage after a short distance with the roving leaving the said positive nipping aggregate.

20. In a drawing frame according to claim 22, projecting ridges being provided with cornb-like corrugations arranged substantially parallel to the direction of operation,

21. In a drawing frame according to claim 22,

a drawing aggregate producing a positive nipi ping, the parts of the said ridges having a dinerent spacing from the nipping line of the said aggregate producing a positive nipping.

22. In a drawing frame, a yielding aggregate .comprising a roller and ridges on said roller projecting transversely to the operating direction and having a distance from each other essentially greater than three times the breadth of a said ridge. FRITZ KRAFFI.