US 3929268 A
An improved apparatus for the production of chenille yarn wherein the pressure rollers which pinch the uncut yarn immediately above the cutting blade are rotatively mounted on spring biased blocks which are arranged to ride within tracks in longitudinal, horizontal alignment. The tracks act to prevent transverse or vertical motion of the pressure rollers and are provided with inwardly positioned, adjustable stops against which the blocks abut to maintain the pressure rollers in precise longitudinal alignment during all periods of use.
Claims available in
Description (OCR text may contain errors)
llnite 1- tent 1 Gross Dec. 30, 1975 PRESSURE ROLLERS FOR CHENILLE MACHINES  lnventor: Alexander Gross, 2590 W. Maple Ave, Feasterville, Pa. 19047  Filed: Jan. 8, 1974  Appl. No.: 431,746
 US. Cl 226/176; 226/187  llnt. Cl. B65h 17/22  Field of Search 57/24; 226/176, 177, 181, 226/186, 187
 References Cited UNITED STATES PATENTS 1,185,260 5/l9l6 Stine 226/177 2,576,430 11/1951 Weller 57/24 3,297,223 l/1967 Bueker 226/194 X 3,370,804 2/1968 Peyton 226/176 X FOREIGN PATENTS OR APPLICATIONS 210,378 7/1960 Austria 226/176 Primary ExaminerRichard A. Schacher Attorney, Agent, or Firm-Weiser, Stapler & Spivak  ABSTRACT An improved apparatus for the production of chenille yarn wherein the pressure rollers which pinch the uncut yarn immediately above the cutting blade are rotatively mounted on spring biased blocks which are arranged to ride within tracks in longitudinal, horizontal alignment. The tracks act to prevent transverse or vertical motion of the pressure rollers and are provided with inwardly positioned, adjustable stops against which the blocks abut to maintain the pressure rollers in precise longitudinal alignment during all periods of use.
10 Claims, 4 Drawing Figures US, Patent Dec. 30, 1975 Sheet 1 of2 3,929,268
US. Patent Dec. 30, 1975 Sheet20f2 3,929,26
PRESSURE ROLLERS FOR CHENILLE MACHINES BACKGROUND OF THE INVENTION The present invention relates generally to the field of chenille yarn producing apparatus, and more particu* larly, is directed to an improved method of mounting the pressure rollers relative to the cutting blade.
This invention is an improvement over the apparatus for production of chenille yarn as disclosed in my copending application, Ser. No. 324,566 filed Jan. 18, 1973, entitled Improvements in Chenille Production Machines and the apparatus disclosed in U.S. Pat. No. 3,777,464 dated Dec. I1, 1973, entitled Apparatus for the Production of Chenille. The machines disclosed in said application Ser. No. 324,566 and in US. Pat. No. 3,777,464 include brass pressure rollers which are positioned immediately below the flyer and above the reciprocating cutting razor to pinch the warp and wrapped weft threads together and to position the yarns relative to the reciprocating razor to produce even cutting of the wrapped threads by the razor.
These pressure rollers have caused prior workers in the art many problems in that in all prior art machines, the pressure rollers are journalled on pivotal arms which were spring biased to urge the rollers together immediately above the reciprocating razor. Due to the geometry of the prior pivotal arm systems, unequal adjustment could readily occur, such as might be caused by unequal spring bias or simple initial misalignment, to push one roller higher than the other to cause misalignment of the yarn relative to the razor. Further, one or both pivotal arms could transversely work out of alignment due to a loosening of the connection between the spring biased arms and the machine frame itself. Any misalignment, either vertical, longitudinal or transverse, of the pressure rollers would immediately affect the quality of the finished product. Any serious degree of misalignment would cause thread breakage and all of the associated loss of time attendant to institute the necessary corrective measures. Further, any significant over bias on the part of one spring on a pivotal arm could cause the associated pressure roller to contact and push against the reciprocating razor. This could either result in razor wear or in physically knocking the razor out of alignment to thereby prevent proper function of the device. Any angular cocking of the reciprocating razor will result in razor bearing wear, unequal severing of the chenille yarn and undue wear of the razor itself. Because of the nature of operation of a chenille production machine, precise pressure roller alignment at all times is a necessity, and this particular construction has caused most of the operating difficulties in prior art machines.
SUMMARY OF THE INVENTION The present invention relates generally to an improved pressure roller apparatus for chenille yarn machines, and more particularly, is directed to improved pressure roller mounting including mounting blocks which ride in opposed, aligned horizontal tracks to maintain the pressure rollers in precise longitudinal and transverse alignment during all periods of operation.
The present invention includes a pressure roller mounting apparatus wherein the pressure rollers are mounted on blocks and have rotary motion thereabout. The blocks ride in horizontally aligned, opposed tracks and are spring biased toward each other to maintain the 2 pressure rollers in tangential, aligned contact. The blocks are machined to include a rack, which meshes with a cooperating pinion. The pinion is rotatively driven by a spring biased arm to continuously urge the blocks toward each other. The horizontally opposed tracks are each provided with inwardly positioned, adjustable stop means to limit the inward travel of each of the blocks to thereby permit precise positioning of the pressure rollers relative to each other, which is not dependent upon a plurality of variable mechanical elements. The blocks tightly ride within the tracks in a longitudinal direction and are carried within the tracks in a manner to absolutely prevent any transverse movement of either the block or its associated pressure roller. By utilizing the movable blocks and the horizontally aligned tracks of the present invention, it is substantially impossible for the pressure rollers to work out of longitudinal or transverse alignment. The present system eliminates all of the problems previously associated with the pressure rollers of the prior art machines It is therefore an object of the present invention to provide an improved apparatus for the production of chenille of the type set forth.
It is another object of the present invention to provide a novel mounting for pressure rollers including a pair of horizontally opposed, aligned tracks and a pair of opposed blocks which ride within the tracks.
It is another object of the present invention to provide a novel mounting apparatus for pressure rollers incorporating a pair of cooperating mountingblocks which are carried within horizontally opposed tracks, said tracks being urged together continuously by spring biased arms, said blocks being maintained apart by action of an adjustable stop which is provided at the inward end of each tracks.
It is another object of the present invention to provide a novel mounting for the pressure rollers of a chenille yarn production machine which includes means to precisely longitudinally align the pressure rollers and means to prevent any transverse motion of the pressure rollers relative to each other or to the machine.
It is another object of the present invention to provide a novel mounting for pressure rollers which includes block means which ride within track means, the block means and track means maintaining the pressure rollers in precise vertical alignment, horizontal alignment and transverse alignment under all conditions of operation.
It is another object of the present invention to provide a novel mounting for pressure rollers that is rugged in construction, precise in operation and trouble free when in use.
Other objects and a fuller understanding of the invention will be had by referring to the following description and claims of the preferred embodiment thereof, taken in conjunction with the accompanying drawings, wherein like reference characters refer to similar parts throughout the several views and in which:
BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a partial, front elevational view of a chenille yarn production machine showing the novel pressure bearing mountings in accordance with the present invention.
FIG. 2 is an enlarged, detail, front elevational view of the pressure roller mountings, with the lint covers and one pressure roller removed to expose interior con- 3 struction details.
FIG. 3 is a perspective view of the pressure roller mounting system, with the lint covers removed.
FIG. 4 is an exploded, perspective view of the pressure roller mounting system.
DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION Although specific terms are used in the following description, for the sake of clarity, these terms are intended to refer only to the particular structure of my invention selected for illustration in the drawings and are not intended to define or limit the scope of the invention.
Referring now to the drawings, I show in FIG. 1 a portion of a chenille yarn production machine which conventionally employs a pair of cooperating pressure rollers 12, 14. The pressure rollers are maintained in spring biased tangential contact immediately above a conventional, reciprocating razor 16 and act to pinch the endless steel bands 18,20 and the associated warp threads (not shown) and wrapped filler yarns (also not shown) together conventionally to facilitate yarn cutting by the razor 16. The endless bands 18, 20 conventionally turn about the respective bottom idler pulleys 22, 24 which are illustrated for purposes of association. The operation of the remainder of the apparatus is fully described in said application Ser. No. 324,566 and US. Pat. No. 3,777,464 and so need not be further described at this time.
As best seen in FIGS. 2, 3, and 4, the pressure rollers 12, 14 mount on respective horizontally slidable blocks 26, 28 and are rotatively arranged on suitable shafts 30, 32 and conventional bushings 34, 36. Each block 26, 28 is provided with an inwardly positioned opening 38, 40 which is sized to receive and retain a respective shaft 30, 32. It will be noted that the rollers 12, 14 have absolutely no transverse movement relative to the shafts 30, 32 or the blocks 26, 28 and so there is no possibility of transverse misalignment. The blocks 26, 28 are generally rectangularly formed in cross sectional configuration and are arranged for horizontal, opposed, sliding movement within a pair of longitudinally aligned tracks 42, 44 as hereinafter more fully set forth. The tracks 42, 44 each have a cross sectional configuration to receive a block 26, 28 in sliding engagement therein in a relatively close tolerance to prevent unwanted transverse, vertical or longitudinal movement of the rollers 12, 14. In order to urge the respective blocks inwardly along the tracks 42, 44 each block is upwardly machined to provide a rack 46, 48 for cooperative action with a pinion 50, 52 in the manner hereinafter more fully set forth.
Preferably, a single casting 54 is provided with the tracks 42, 44 integrally formed therein. The casting 54 is secured to the machine frame 56 in well known manner, such as by employing nuts and bolts (not shown). Respective right and left sockets 58, 60 are formed in the casting 54 and communicate with the tracks 42, 44. The sockets terminate rearwardly in bearings 62, 64 and rotatively receive the pinions 50, 52. As illustrated in the drawings, the left and right pinions 50, 52 respectively mesh with the left and right racks 46, 48 formed in the blocks 26, 28 in a manner to urge the blocks longitudinally along their associated tracks 42, 44 as the pinions are rotated. Each pinion shaft 66, 68 (FIG. 4) is rotatively carried within a bearing 62, 64 and includes a rearwardly positioned socket 70, 72 which receives an operating arm 74, 76 therein for pinion operation. As best seen in FIGS. 1 and 2, a spring 78,80 biases between the end of each operating arm 74, 76 and a portion of the machine frame 56 in a manner to continuously urge the left pinion 50 in a counter-clockwise direction as indicated by the arrow 82 and the right pinion 52 in a clockwise direction as indicated by the arrow 84 (FIG. 2). In this manner, the springs 78, functioning through the operating arms 74, 76, continuously bias the respective left and right blocks 26, 28 toward each other along the tracks 42, 44. Adjustable stops 86, 88 affix to the casting 54 by employing threaded fasteners 90, 92 which turn into the drilled and tapped openings 94, 96. Each stop 86, 88 is angularly formed to provide a horizontal adjustment leg 98, and a stop leg 102, 104 which depend vertically downwardly therefrom. The adjustment legs 98, 100 are each provided with an elongated adjustment slot 106, 108 which slots extend in a longitudinal direction. Each threaded fastener 90, 92 inserts through a respective slot 106, 108 and when tightened, securely affixes the stop 86, 88 to the casting. The depending stop legs 98, 100 respectively inwardly align with an inward terminus 110, 112 of a track 42, 44 to thereby provide an inward limit of travel for the respective blocks 26, 28. Thus, the exact inward limit of longitudinal travel within a track 42, 42 can be accurately and permanently set for each block 26, 28 by adjusting the positions of the stops 86, 88.
As best seen in FIG. 4, each track 42, 44 terminates rearwardly in a solid back 114, 116, which act as a positive limit to possible transverse movement on the part of the blocks 26, 28 and the associated pressure rollers 12, 14. The tracks 42, 44 then serve to eliminate all possibility of either vertical or transverse movement of the pressure rollers 12, 14. The only adjustment possible is a longitudinal adjustment which is made by adjusting the position of the stops 86, 88. In this manner, the precise inward position of each pressure roller 12, 14 can be permanently established to position the nip 118 which is defined between the rollers 12, 14 in vertical alignment with the cutting razor 16. It will be noted that the springs 78, 80 function to continuously bias the blocks 26, 28 into contact with the depending stop legs 102, 104 to thereby assure precise alignment of the pressure rollers 12, 14 at all times. Lint covers 120, 122 cover the opposed pairs of blocks and tracks 26, 42 and 28, 44 to unify the construction and to prevent lint from the wrapped yarn cutting operation from interfering with the operation of the mechanism. Although I have described the present invention with reference to the particular embodiments therein set forth, it is understood that the present disclosure has been made only by way of example and that numerous changes in the details of construction may be resorted to without departing from the spirit and scope of the invention. Thus, the scope of the invention should not be limited by the foregoing specification, but rather only by the scope of the claims appended hereto.
1 claim: 1. In a pressure roller system containing a left roller and a right roller, the combination of A left and right block means to each respectively carry one said roller, 1 each roller having rotative motion relative to its associated block means; B left track means to slidingly receive the left block means,
1 said left block means having longitudinal movement within the left track means,
2 said left track means including means to prevent transverse and vertical movement of the left block means,
3 said left track means including left stop means to limit the inward, longitudinal movement of the associated block means;
C right track means to slidingly receive the right block means,
l said right block means having longitudinal movement within the right track means,
2 said right track means including means to prevent transverse and vertical movement of the right block means;
3 said right track means being provided with right stop means to limit the inward, longitudinal movement of the associated block means;
D left and right spring biased means to continuously respectively urge the left and right block means toward each other, whereby the pressure rollers are urged into tangential contact; and
E the left and right stop means having longitudinal adjustment means to vary the inward limit of travel of the left and right block means.
2. The pressure roller system of claim 1 wherein the stop means each comprise an adjustment leg and a stop leg, the longitudinal adjustment means being positioned in the adjustment leg.
3. The pressure roller system of claim 2 wherein the adjustment means comprise an elongated slot, said direction of elongation extending in longitudinal alignment with the track means.
4. The pressure roller system of claim 3 wherein each stop leg inwardly intersects the longitudinal extension of the associated track means, said stop leg being contacted by the block means.
5. The pressure roller system of claim 1 wherein the respective left and right block means and the left and right track means have substantially the same cross sectional configuration, the said track means being sized to receive the block means in sliding engagement and in close tolerance.
6. The pressure roller system of claim 5 wherein the cross sectional configuration is rectangular.
7. The pressure roller system of claim 1 wherein the spring biased means each include a spring, and means to transmit the bias of the spring to the associated block means.
8. The pressure roller system of claim 7 wherein each means to transmit includes a rack and a pinion.
9. The pressure roller system of claim 8 wherein each rack is provided in the associated block means.
10. The pressure roller system of claim wherein each means to transmit includes an operating arm, said operating arm connecting to the spring and to the pinion, whereby the bias of the spring acts to continuously rotate the pinion.