US3118633A - Means for attaching a strand to a rotary member - Google Patents

Description

Jan. 21, 1964 E. A. BELVlLLE 3,113,633

MEANS FOR ATTACI-IING A STRAND TO A ROTARY MEMBER Filed Sept. 25, 1961 a Sheets-Sheet 1 I NVENTOR.

ERNEST A. EELV/LLE ATTORNEY Jan. 21, 1964 E. A. BELVILLE MEANS FOR ATTACHING A STRAND TO A ROTARY MEMBER Filed Sept. 25, 1961 3 Sheets- Sheet 2 ,4 TTORNE Y Jan. 21, 1964 E. A. BELVILLE 3,113,633

MEANS FOR ATTACHING A STRAND TO A ROTARY MEMBER Filed Sept. 25, 1961 3 Sheets-Sheet 3 e2- i iii INVENTOR.

ERA/E57 A. BEL V/LLE ATTORNEY United States Patent 3,118,633 MEANS FUR ATTACHING A STRAND T0 A RGTARY MEMBER Ernest A. Eelville, 17 Hilltop Ave, Barre, Vt. Filed Sept. 25, 196i, Ser. No. 149,4 6 Claims. t'll. 242125.1

This invention relates to improvements in bobbins and other cores on which attenuated textile materials may be wound and more particularly to improved means for attaching the end or" a strand of yarn to the bobbin or core for winding it thereon.

In the present specification and claims the term bobbin is used in a general sense to apply to any type of core or container for strand material whatever its shape, and the term yarn is employed to include all varieties of filamentary material.

As herein shown and described the present imp-rovements are applied to a conventional type of bobbin for holding weft or filling yarn, and also to a rotary member or mandrel on which the strand is to be wound for transferring it from one holder to another or from a partly exhausted bobbin to remove the remainder of the yarn therefrom.

One object of the invention is to provide improved means for catching and holding the end or" a strand of yarn or the like to attach it to a bobbin or other rotary member for winding it thereon.

Another object is to provide means of the type specified particularly adapted for use with weft or filling bobbins wound on automatic winding machines in which the completed bobbins are doffed and fresh bobbins donned on the winding spindles to render the operation of the machine continuous without manual manipulation.

Another object is to provide means on the bobbin or other yarn container in the form of teeth or prongs under which the yarn strand may be drawn and held so that when the bobbin is rotated the end of the yarn will be attached thereto for causing it to wind thereon.

Another object is to provide a tubular sleeve or ferrule fixedly secured to the barrel of the bobbin and having teeth or prongs projecting therefrom in spaced relation to the barrel with which the end of the strand may be engaged and retained to fasten the yarn to the bobbin.

Further objects of the invention are set forth in the following specification which describes a preferred form of construction of the device, by way of example, as illustrated by the accompanying drawings.

Like reference numerals refer to like parts in the accompanying drawings in which:

FIGURE 1 is a side elevational view of a portion of an automatic bobbin-winder showing a bobbin embodying the present improvements mounted on the machine with a strand of yarn positioned for attachment thereto prior to winding it on the bobbin.

FIGURE 2 is an end elevational view of the elements of the winding machine shown in FIGURE 1 illustrating the means for carrying the yarn strand along the barrel of the bobbin into position to be gripped by the prongs On its head to attach the end of the yarn thereto.

FIGURE 3 is an enlarged view showing a portion of a filling bobbin with a preferred form of the present invention applied thereto.

FIGURE 4 is a part-sectional end view taken on line 4-4 of FIGURE 3.

FIGURE 5 is a transverse cross sectional view taken on line 55 of FIGURE 4 illustrating a full length filling bobbin provided with the present thread catching attachment.

FIGURE 6 is a perspective view of the new and improved plastic ferrule having teeth or prongs integral 3,ii8,633 Patented Jan. 21, I94

therewith and adapted to be applied to the barrel of the bobbin as shown in FIGURE 3.

FIGURE 7 is a modified form of the ferrule shown in FIGURE 6.

FIGURE 8 is a vertical cross sectional view taken on line 88 of FIGURE 7.

FIGURE 9 is a perspective view similar to FIGURE 6, showing the face, not clearly shown in FIGURE 6.

FIGURE 10 is a horizontal cross sectional view through a bobbin showing a modified form for attaching the ferrule to the bobbin.

FIGURE 11 is a view similar to FIGURE 10 showing another modified form of attaching the ferrule to the bobbin.

FIGURE 12 is a perspective view of a machine used to create friction on the plastic ferrule whereby the plastic flows into a groove in the barrel to secure the plastic ferrule to the bobbin.

FIGURE 13 is a transverse cross sectional view through the machine illustrated in FIGURE 8.

FIGURE 14 is a perspective view of the chuck used for holding the plastic ferrule in the machine shown in FIG- URES 8 and 9.

In automatic bobbin winding machines at present in use bare bobbins are fed into the machine and donned in connection with the winding spindle to be held between axially-alined rotatable centers, one of which is driven to rotate the bobbin for winding yarn thereon. In accordance with a common practice the end of the strand to be wound is placed across a cupped spindle-center and pinched by the head of the bobbin held therein to attach the yarn to the bobbin for winding it thereon. This method of fastening the yarn to the bobbin has not been found entirely satisfactory unless the strand is placed accurately across the cupped center of the winding spindle and held under the head of the bobbin with considerable pressure it is liable to slip and become detached when the winding is started.

To avoid this condition and other deficiencies of previous methods of attaching the end of a strand of yarn or the like to a bobbin or other core prior to winding it thereon the present invention provides for positively gripping the yarn to the head of the bobbin to provide a secure attachment of the strand thereto.

While the present invention is particularly adapted for use with automatic winding machines it may also be employed with winders of other types; for example, machines in which the end of the yarn is fastened manually to the bobbin or in other apparatus where it is necessary to wind the yarn onto a mandrel or holder to withdraw it from a partly denuded bobbin such as a bobbin-stripper.

The essential elements of an automatic bobbin-winder are illustrated in FIGURE 1 of the present drawings as comprising means for donning empty bobbins in connection with the winding spindle and attaching the end of the yarn thereto to start the winding operation. In a machine of the type described the bobbin Ill is usually mounted with its head inserted in the hollow center 2 on the end of the rotary winding spindle 3 and its opposite end held by a spindle-center 4 rotatable in an outboard bearing or tail-stock on the winding machine. A supply of empty bobbins is contained in a magazine above the winding spindle with automatic donning means provided for individually placing the bobbins between the spindle- centers 2 and 4 in position for winding the yarn thereon. The outer spindle-center 4 may be mounted for axial movement with means for withdrawing it from the tip end of the bobbin 10 to doll the latter when it is filled with yarn, and thereafter it may be moved in the opposite direction for engaging the tip of a newly donned bobbin to force its head or butt into the cup shaped 3 center 2 whereby to mount the bobbin for rotation by the spindle.

in an automatic bobbin-winder described and illustrat d in United States Letters Patent No. 2,638,936, issued May 19, 1953, a traveling clip, shown at 5 in FIGURE 1, cooperates with the yarn-guide G for taking the end of the supply yarn, after the trailing end of the doffed bobbin has been severed therefrom, to carry said end back along the barrel 12 of the bobbin 19 for attaching it thereto at a point adjacent the head 11 of the bobbin. The present invention is particularly adapted for use as strandattaching means for machines of the type shown in FIG- URE 1 of the present drawings and described above, but it is to be understood that the device may be used for other yarn cores or holders whether or not automatic means are employed for carrying the yarn to said attach ing means.

The present thread catching means is an improvement over the thread catching means disclosed in United States Patents No. 2,614,771 and No. 2,824,708.

Reference is now made to FIGURES 3 thru 11. A conventional bobbin or pirn, generally indicated by reference numeral 10, consists of a cylindrical head 11 integrally provided with a relatively long barrel 12 of less diameter. Barrel 12 projects axially from head 11.. A shoulder 13 is formed between head 11 and barrel 12 due to the smaller diameter of the barrel 12 in comparison to head 11. Bobbin it} may be fabricated from wood, plastic, aluminum, paper or the like. Head 11 may be provided with the usual holding rings 14 projecting from its peripheral surface and the usual axial bore 15.

Applicants contribution to the art will now be described. Barrel 12 is provided with a circumferential recess 16 which consists of a peripheral surface inclined from the surface of barrel 12 toward the horizontal axis Z of bobbin it and terminates at the base of shoulder 13. Circumferential recess in completely encircles barrel 12.

The term ferrule as used herein means a ring, a band, an annulus, or a hollow circular bushing.

A ferrule, generally indicated by reference numeral 2%, is contemplated to be fabricated from nylon. However, Teflon or other material could be substituted within the scope of the appended claims.

Ferrule 2i} is provided with an axial bore 21 substantially equal in diameter to the diameter of barrel 12. Ferrule 2b is also provided with an outer diameter 22, substantially equal to the diameter of head 11. Perrule 2%) is provided with a rear surface 23 which is adapted to abut shoulder 13 and a face, generally indicated by reference numeral 25. Face 25 is illustrated as comprising two rearwardly tapered spiral sections 26, 27. Teeth 28, 2? are formed in the leading edge of the respective sections 26, 27. As illustrated (FIGURES 3 and 9) teeth 28, 29 are located one hundred eighty degrees apart. The leading edges of the teeth 28, 29 are tapered downwardly and rearwardly to form undercuts or recesses 30, 31 which are adapted to hold yarn strands or threads. The teeth 28, 29 face in a direction ninety degrees to axis Z.

Each section, for example section 26 is provided with a thread catching peripheral groove 32 which begins at the base of one recess 39 and ends at the base of the next recess 31. The rear wall 33 of the groove is substantially straight while the front wall 34 is arcuate in shape so that the rotating ferrule 28 will force a yarn strand over arcuate front wall 34 and against straight rear wall 33 where recess 3st? will engage and rotatively carry the yarn strand around the barrel 12 of bobbin it Face 25 may be provided with one tooth or two teeth 23, 29 as illustrated or more teeth as the size of the yarn strand and the speed of rotation of bobbin 16 dictates.

In the modified form shown in FIGURE 7 ferrule 20A is provided with a bead or cylindrical projection 4i? integrally formed on rear surface 23A for purposes which 4 will presently appear. Axial bore 21A is provided in ferrule Zt A including cylindrical projection at In the additional modified form shown in FIGURE 10 cylindrical projection 46B is provided with screw thread which rotatively engages threads 428 provided in head EB. Threads e23 provide for a direction of rotation opposite to the direction of rotation of bobbin 1913 when said bobbin is rotating in a yarn win ing direction in the direction of the arrow.

The ferrule 2i illustrated in FIGURE 6 may be fabricated from one of the plastic materials, such as Teflon which possesses What is known in the trade as plastic memory. That is, axial bore 21 is provided with a given diameter, for example, the diameter of barrel 12. Ferrule 2% may be placed. in position over circumferential recess 16. Ferrule 2i) and bobbin 1b are then subjected to a preselected temperature heat bath. That pre-selected temperature will cause the Teflon or plastic ferrule 20 to permanently shrink in position on barrel 12. Circumferential recess 16 may be dispensed with when this form of attachment is used.

Adhesives 56A (see FIGURE 11) may be used to permanently bind or secure ferrule 29C to shoulder 13C and barrel 12C. When adhesives are used circumferenrial recess in is dispensed with.

However, the preferred form of permanently attaching ferrule 23 to bobbin it? through circumferential recess 15 is through frictional heat, so applied to ferrule 26 that the plastic nylon surrounding axial bore 21 will melt and flow into circumferential recess 16. The frictional heat must be applied in a manner which totally unaffects spiral sections as, 27 and their attenuating structures.

Reference is made to FZGURES 12, 13, and 14 wherein is illustrated a form of lathe used to apply frictional heat to axial bore 21.

The lathe, generally indicated by reference numeral 543, comprises a head stock 51 and a tail stock 52, mounted in spaced relation upon a bed 53.

Tail stock 52 is provided with bore 54. A bushing 55 is slidably mounted in bore 54. A spring 56 yieldingly holds bushing 55 in preselected position. A plunger 57 secured to bushing 55 by means of sleeves 58, 59 is provided with a bobbin receiving orifice 6t). Plunger 57 in cooperation with spring 55 provides a detent action.

A motor 61 provided with a revolving pulley 62 is secured to head stock 51. A bushing 63 provided with a cavity'7t is rotatively mounted in head stock 51 through bearings 64, 65. A pulley 66 is secured to bushing 63. A belt 6'7 rotatively connects pulley 62 with pulley 66. A plug 71 provided with a centering element 73 secured thereto, is slidably mounted in cavity 78. A spring 72 located in cavity 76 cooperates with plug 71 to provide a detent action. Plug '71 is provided with gripping pins 77.

Bed 53 is provided with oppositely located tracks 75, 76. Head stock 51 is slidably mounted in said tracks 75, 76. A bell crank lever 3t pivotally mounted to bed 53 through stud 81, slidably engages elongated slot 82 in head stock 51 to slide head stock 51 toward and away from tail stock 52.

A holding block 85 is integrally formed in bed 53 and is provided with a C-sbaped slot 86 adapted to accommodate barrel 12. A circumferential recess 87 is provided in holding block 85 in axial alignment with C-shaped slot 86. One or more stops 88, illustrated as two in number, are secured in block 85 and project into recess $7.

In operation a ferrule 20 is slid along barrel 12 of a bobbin 10. Barrel 12 is slid through C-shaped slot 86 with ferrule 29 placed in circumferential recess 87 Teeth 28, 29 are positioned to abut stops 88. Bell crank lever 8i is actuated to cause gripping pins 77 to engage the end of head 11 with centering element 73 aligned in axial bore 15. The actuation of bell crank lever Si) will slide barrel 12 through axial bore 21 until the end 91 of bobbin '10 engages bobbin receiving orifice 60. Bushing 63 is caused to rotate through motor 61, pulleys 62, 66 and belt 67, there *y rotating head 11 through gripping pins 77. The rotation of head 11 and bobbin 14 while ferrule 21 is held against rotation through teeth 28, 29 and stops 88 causes heat, through friction on the walls of axial bore 21. The heat and pressure on rear surface 23, the pressure being applied from hell crank lever 89 through busing 63, will force the material of the ferrule 29 adjacent axial bore 21 to flow into circumferential recess 16. Three to five revolutions of bobbin lll at ten thousand revolutions per minute is suflicient to heat the walls of axial bore 21. The sudden rotation and the sudden release of gripping pins 77 from engagement with head 11 prevents the heat concentrated in the wall of axial bore 21 from radiating sufiiciently through ferrule to influence or distort sections 26, 27 or teeth 28, 29.

The rear surface 23 of ferrule 2i abutting shoulder 13 will adhere to the fibers of head 11 when the bobbin 1% is fabricated from wood and when the area around axial bore 21 is subjected to the maximum degree of heat necessary to cause the plastic material to flow under pressure, namely, the squeeze pressure applied on ferrule 2'1) as it lies between bushing 63 and the base of circumferential recess 87.

The modified form of ferrule ZiiA illustrated in FIG- URE 7 has a bead or cylindrical projection 49 to provide additional plastic material which can flow into circumferential recess 16 as friction and pressure are applied, as recited in the next above paragraph.

The method of operation of the present improved device is explained as follows: Referring to FIGURES 1 and 2 of the drawings, after a new bobbin it) has been donned between the spindle- centers 2 and 4 it is immediately started to rotate and meanwhile during the doifing of the completed bobbin the yarn y leading from the supply through the yarn-guide G is seized by the clip 5 and carried back towards the head of the bobbin as the clip slides therealong. It will be observed by reference to FIGURE 2 that the bobbin 16 rotates clockwise and the strand of yarn y is drawn down from the yarn-guide G across the rearward face of the barrel of the bobbin as said guide moves with the clip 5 towards the head 11 of the bobbin 1% As the strand y is brought up against the head 11 of the bobbin it? on the rearward side of its barrel 12, one of the peripheral grooves 32 will engage and guide the strand into one of the recesses 3% or 31 where one of the teeth 28, 29 will engage the strand of yarn y as the end of the strand is released from the clip, which is opened at this point, the end will be carried around the barrel of the bobbin and attached thereto. After one tooth has engaged across the strand for holding its end the following teeth in the circle or face will pass thereunder without engaging With the yarn. Should the first tooth passing the strand fail to catch the yarn and carry it around, the next succeeding peripheral groove 32 Will engage with the strand to carry it around to the next succeeding tooth to attach the strand to the bobbin.

It will now be understood why the peripheral grooves 32 are provided. The rotation of the bobbin it) is retating at such a speed that the bobbin it) is able to make several revolutions during the period that the yarn y is held in position at the peripheral grooves 32 and before clip 5 releases the yarn y. It will also be understood why the teeth 23, 25? are disposed at right angles to axis Z of the bobbin l0 and why the recesses 39, 31 are provided at the base of the face of the teeth and at the end of the peripheral grooves. It has been proved by numerous tests that with the present improved device the yarn will invariably be caught and drawn around the barrel of the bobbin to fasten it thereto with absolutely no skips or failures. In other words, the device acts with the utmost efiiciency to positively catch and seize 6 the end of the yarn and attach it to the bobbin or other core for winding it thereon.

Having shown and described preferred embodiments of the present invention by way of example, it should be realized that structural changes could be made and other examples given without departing from either the spirit or scope of this invention.

What I claim is:

1. In a bobbin for holding filling yarn wound thereon and having a cylindrical head at one end with a relatively long barrel of less diameter than the head projecting axially therefrom, a shoulder formed at the intersection of said barrel with said head, a circumferential recess in said barrel completely encircling said barrel adjacent said shoulder, a ferrule provided with an axial bore, a rear surface and a face comprising two rearwardly tapered spiral sections, a tooth formed in the leading edge of each section, a peripheral groove in each section starting at the base of one tooth and terminating at the base of the next tooth, said axial bore slidingly engaging said barrel with said rear surface abutting said shoulder with said teeth overlying said barrel, said axial bore overlying said circumferential recess, and means securing said fer rule to said barrel, said means completely encompassing said circumferential recess.

2. In a bobbin for holding filling yarn wound thereon and having a cylindrical head at one end with a relatively long barrel of less diameter than the head projecting axially therefrom, a shoulder formed at the intersection of said barrel with said head, a circumferential recess in said barrel completely encircling said barrel adjacent said shoulder, a plastic ferrule provided with an axial bore, a rear surface and a face comprising two rearwardly tapered spiral sections, each section having a leading edge, a tooth formed in the leading edge of each section, one tooth located one hundred eighty degrees from the other tooth, the leading edges of the teeth tapering downwardly and rearwardly, a peripheral groove in each section starting at the base of one tooth and terminating at the base of the next tooth, thread catching recesses formed at the intersection of each peripheral groove and the base of each leading edge, said axial bore slidingly engaging said barrel with said rear surface abutting said shoulder, said axial bore overlying said circumferential recess, a cooperating extension on said ferrule which fits tightly within and completely encompasses said circumferential recess thereby securing said ferrule to said barrel.

3. In a bobbin for holding filling yarn wound thereon and having a cylindrical head at one end with a relatively long barrel of less diameter than the head projecting axially therefrom, a shoulder formed at the intersection of said barrel with said head, a circumferential recess in said barrel completely encircling said barrel adjacent said shoulder, a plastic ferrule provided with an axial bore, a rear surface provided with a cylindrical projection and a face comprising two rearwardly ltapered spiral sections, each section having a leading edge, a tooth formed in the leading edge of each section, one tooth located one hundred eighty degrees from the other tooth, the leading edge of each tooth tapering downwardly and rearwardly, a peripheral groove in each section starting at the base of one tooth and terminating at the base of the next tooth, thread catching recesses formed at the intersection of each peripheral groove and the base of each leading edge, said axial bore slidingly engaging said barrel with said rear surface abutting said shoulder, said axial bore overlying said circumferential recess, a cooperating extension on said ferrule which fits tightly within and completely encompasses said circumferential recess thereby securing said ferrule to said barrel.

4. In a bobbin for holding filling yarn wound thereon and having a cylindrical head at one end with a relatively long barrel of less diameter than the head projecting axially therefrom, a shoulder formed at the intersection of said barrel with said head, a circumferential recess completely encircling said barrel, a ferrule provided with an axial bore having a diameter substantially equal to the diameter of said barrel, said ferrule having an outer diameter substantially equal to the diameter of said cylindrical head, a rear surface and a face comprising a plurality of rearwardly tapered spiral sections, each section having a leading edge, a tooth formed in the leading edge of each section, the leading edges of the teeth tapering downwardly and rearwardly, a peripheral groove in each section starting at the base of one tooth and terminating at the base of the next tooth, thread catching recesses formed at the intersection of each peripheral groove and the base of each leading edge, said axial bore slidingly engaging said barrel with said rear surface abutting said shoulder, and means securing said ferrule to said barrel, said means completely encompassing said circumferential recess.

5. In a bobbin for holding filling yarn Wound thereon and having a cylindrical head at one end with a relatively long barrel of less diameter than the head projecting axially therefrom, a shoulder formed at the intersection of said barrel with said head, a circumferential recess in said barrel and adjacent said shoulder, a plastic ferrule provided with an axial bore having a diameter substantially equal to the diameter of said barrel, said ferrule having an outer diameter substantially equal to the diameter of said cylindrical head, a rear surface and a face comprising a plurality of rearwardly tapered spiral sections, each section having a leading edge, a tooth fonrned in the leading edge of each section, the leading edges of the teeth tapering downwardly and rearwardly, a pcripheral groove in each section starting at the base of one tooth and terminating at the base of the next tooth, thread catching recesses formed at the intersection of each peripheral groove and the base of each leading edge,

said axial bore slidingly engaging said barrel with said rear surface abutting said shoulder, said axial bore overlying said circumferential recess, a cooperating extension on said ferrule which fits tightly within the circumferential recess securing said ferrule to said barrel.

6. A bobbin with a horizontal axis for holding filling yarn wound thereon and having a cylindrical head at one end with a relatively long barrel of less diameter than the head projecting horizontally and axially therefrom, a shoulder for-med at the intersection of the barrel and the head, a circular recess consisting of a peripheral surface inclined from the surface of the barrel toward the axis of the bobbin and terminating at the base of the shoulder, a plastic ferrule having an axial bore adapted to slide along said long barrel, a cooperating extension on said ferrule fitting tightly within and completely encompassing said circular recess thereby securing said ferrule to said long barrel, said ferrule having a rear surface and a face, said rear surface abutting sa-id shoulder, a plurality of sections projecting from said face, each section spirally tapering toward the rear surface, a tooth formed in each section, and a circular thread groove formed in each section to engage a strand of yarn sliding along said barrel toward said head for attaching a strand of yarn to the barrel.

References Cited in the file of this patent UNITED STATES PATENTS 2,381,870 Amrhein et a1 Aug. 14, 1945 2,573,598 Perry et a1. Oct. 30, 1951 2,614,771 Goodhue Oct. 21, 1952 2,824,708 Higgins Feb. 25, 1958 2,933,428 Mueller Apr. 19, 1960 3,002,871 Trannn et a1. Oct. 3, 1961

Claims (1)

1. IN A BOBBIN FOR HOLDING FILLING YARN WOUND THEREON AND HAVING A CYLINDRICAL HEAD AT ONE END WITH A RELATIVELY LONG BARREL OF LESS DIAMETER THAN THE HEAD PROJECTING AXIALLY THEREFROM, A SHOULDER FORMED AT THE INTERSECTION OF SAID BARREL WITH SAID HEAD, A CIRCUMFERENTIAL RECESS IN SAID BARREL COMPLETELY ENCIRCLING SAID BARREL ADJACENT SAID SHOULDER, A FERRULE PROVIDED WITH AN AXIAL BORE, A REAR SURFACE AND A FACE COMPRISING TWO REARWARDLY TAPERED SPIRAL SECTIONS, A TOOTH FORMED IN THE LEADING EDGE OF EACH SECTION, A PERIPHERAL GROOVE IN EACH SECTION STARTING AT THE BASE OF ONE TOOTH AND TERMINATING AT THE BASE OF THE NEXT TOOTH, SAID AXIAL BORE SLIDINGLY ENGAGING SAID BARREL WITH SAID REAR SURFACE ABUTTING SAID SHOULDER WITH SAID TEETH OVERLYING SAID BARREL, SAID AXIAL BORE OVERLYING SAID CIRCUMFERENTIAL RECESS, AND MEANS SECURING SAID FERRULE TO SAID BARREL, SAID MEANS COMPLETELY ENCOMPASSING SAID CIRCUMFERENTIAL RECESS.

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