US3857529A

US3857529A - Bobbin

Info

Publication number: US3857529A
Application number: US00396727A
Authority: US
Inventors: T Pitts; R Morton; M Teixeira
Original assignee: LESSONA CORP
Current assignee: Leesona Corp; LESSONA CORP
Priority date: 1973-09-13
Filing date: 1973-09-13
Publication date: 1974-12-31
Anticipated expiration: 1991-12-31
Also published as: FR2243900A1; JPS5070619A; BR7407613D0; DE2443234A1; IT1021274B

Abstract

A yarn collecting bobbin comprising an elongated tube having a frustro-conical member having a yarn receiving outer surface affixed thereto is disclosed. The bobbin is so constructed that presently known paper tubes may be utilized as an integral part of its construction, thus resulting in a savings of material through recycling. An intermediate collar having means for positive connection to the tube by puncture penetration thereof by tooth portions thereof is disclosed. Also disclosed is a method of assembling the separate bobbin portions that may be advantageously practiced with the disclosed bobbin construction.

Description

[451 Dec. 31, 1974 United States Patent [191 Pitts. et al.

BOBBIN Primary Examiner-George F Mautz Attorney, Agent, or Firm-Albert P. Davis; Burnett W. Norton 0 .a w l. m; i wb nr m m C s n mmm r Wm B M N G .L SE]. a e md ob ho H TRMa & r o t n a v n I M 7 [73] Assignee: Lessona Corporation, Warwick, RI

Filed: Sept. 13, 1973 ABSTRACT A yarn collecting bobbin com Appl. No.: 396,727

d mmm wwn n o oma d t .w m pf nl lea wwe m en ep fi a 8 a n .1 g

through recycling. An intermediate collar means for positive connection to the tube b penetration thereof b vfinlomm 38 E00 Ill Zh 45 pb 2% n .1 a 8 1 .1 7 1 m .1 W38 l mH me M200 um l m6 m m u r a1 0 n &. I f C M mk UIF ii] 2 8 555 [ii y puncture closed. Also disclosed is a method of ass separate bobbin portions that ma 242/113 31 practiced with the disclosed bob 242/ll8.32 FOREIGN PATENTS OR APPLICATIONS 444,809

5% T m N mm W mm mA P. n sEt" mT fi n m.m mT m .NSSK e ed H99 NHH U92 2O 00 m% 6 47 U 3 3 5 Claims, 7 Drawing Figures 3/1936 Great Britain................. 242/1 l8.32

was

BOBBIN The present invention relates to a yarn collecting bobbin and relates, more particularly, to a new and novel yarn collecting bobbin comprising an elongated tube having a generally frusto-conical member attached thereto at a lower portion thereof.

As used herein the term yarn means any type of attenuated material either textile or otherwise, and the term bobbin is employed in a generic sense as applying to any type of yarn receiver.

Bobbins of various configurations, and constructed of various materials are well known in the art. Such bobbins usually have a hole bored through the length thereof by which the bobbin can be placed on a spindle, skewer, etc., for rotation therewith. The bobbins are used to hold roving, yarn, thread, etc., which is wound into yarn packages thereon as part of the processing of the yarn on a variety of machine operations, such as spinning or twisting. The type of bobbin selected for any given wind-up operation will depend upon factors such as the size and shape of the yarn package desired and upon the ultimate .use of the package.

With the advent of automatic tending mechanisms for spinning frames and the like as disclosed in U.S. Pat. No. 3,403,866 it has become desirable to provide a bobbin comprising an elongated, tapered tube having a frustro-conical skirt affixed thereto and having a yarn engaging portion projecting beyond the lower end of the skirt. As is fully disclosed in the above cited patent, and with particular reference to the specific ring rail traverse motion described therein, these so-called skirted bobbins contribute to the production of cylindrical yarn packages adapted for over-end unwindmg.

Such skirted bobbins are generally of unitary construction wherein the barrel of the bobbin and the skirt are formed from molded plastic material. While these unitary plastic skirted bobbins meet some of the needs of the textile industry, such plastic bobbins are however expensive. With the recognition that presently in the textile industry there exists immense quantities of elongated, slender, hollow tubular bobbins (generally of plied paper construction with forward and base ends provided with metal wear ferrules) of the type customarily employed to wind up yarn on spinning and twisting machines and the like, and, further, there presently is capacity for the quantity production of these tubular bobbins it becomes evident that the production of a skirted bobbin adapted from these tubular bobbins is a highly desirable product for use with automatic tending equipment.

Accordingly, the present invention is directed to the provision of a skirted bobbin incorporating an elongated barrel or tubular portion with the tubular portion having a slight taper over its full length, the taper being such that the diameter of the tubular portion increases from apex to base. This elongated tubular portion conforms to the present day tubular bobbins for spinning and twisting machines and the like discussed above.

In accordance with the present invention a frustroconical member encircles and it attached to the base end of the tubular portion by means of a separate collar also positioned on the tubular portion by means of a separate collar also positioned on the tubular member and intermediate said frustro-conical element. A short portion of the tubular member generally extends beneath the base portion of the element for purposes more fully brought out in the following copending and commonly assigned patent applications, Ser. Nos. 145,753 and 145,726, both filed May 21, 1971 now respectively U.S. Pat. Nos. 3,782,657 and 3,790,100. These bobbins are relatively inexpensive to manufacture and assemble and are easy to balance and maintain their balance over long continued. use, and are particularly suited for use with mechanisms operable to commence winding of yarn on the bobbin automatically.

OBJECTS OF THE INVENTION It is an object of the invention to provide a skirted yarn collector or bobbin which is suitable for use in automatic bobbin winding operations particularly those associated with automatic tending mechanisms for spinning frames and the like.

Another object of the present invention is to provide a skirted bobbin wherein a skirt is attached to an elongated conical portion by means of an intermediate collar in a rapid and efficient manner contributing to an overall bobbin construction which is economical and easy to manufacture.

These and other objects of the invention will be brought out in the following descriptive portions of the application. 1

DESCRIPTION OF THE DRAWING FIGS. 5a and 5b are partial sectional views on an enlarged scale showing the biting action of the collar teeth and demonstrates particularly how the placement thereof resists relative axial forward movement of the element and collar relative to the tubular member; and

FIG. 6 is an assembly view showing particularly the methodby which the components of the present bobbin are joined.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings of the disclosure of the present invention and particularly FIG.. 1 thereof, a bobbin 10 is shown. Such bobbin is comprised of an elongated generally cylindrical tube member 12, an element 14 having a generally frustro-conical outer strand receiving surface 16 and a collar 18 which serves to positively connect the element 14 to the member 12 in a predetermined position thereon so as to present an overall bobbin configuration such as shown in FIG. 1 of the drawing. The tube member 12 is of elongated generally cylindrical configuration having forward and base ends 20 and 22 respectively. Both such ends of'the member 12 are preferrably provided with a metal ferrule which enhances the wear characteristics of the resultant bobbin as is known in the art. Such member 12 generally is also of a type presently available in the textile industry and employed on conventional textile machines for taking up yarn. Such member is generally formed of plied'paper or wood.

The element 14 is preferrably molded as by injection molding techniques from a plastic material e.g., nylon, high density polyethylene or polypropylene. The element 14 is further provided with a frustro-conical outer surface 16 which is preferrably roughened or covered with a suitable frictional material to preclude the coils of yarn wrapped thereon from slipping off such surface. A bore 24 is provided at the forward end 28 of the element 14 and is dimensioned so as to snuggly receive that portion of the tubular member being engaged therewith when the element is fixedly positioned at a predetermined location along the tubular member 12. The base end 30 of the element 14 is further recessed to form surface 26 which terminates in a series of ledges or steps 27,- 29 and 31 for receipt of the collar 18 in a manner which will be hereinafter brought out.

Referring now in particular to FIGS. 2, 3 and 4 of the drawings, the construction of the collar 18 is more particularly shown and includes a main circular portion 32 having a surface face 33 at one side from which a plurality of legs 36 extend longitudinally thereof. The other side of the portion 32 terminates in a flange 34 of enlarged diameter. Each leg 36 is in'turn provided with a terminal foot portion 38 having respectively in turn inner and

outer surfaces

40 and 42. Each inner surface 40 is in turn provided with a tooth or projection 44 and the outer surface 42 is preferrably chamfered as at 46. As best seen in FIG. 4 of the drawings the central circular portion 30 of the collar 18 is provided with a plurality of pads 48 for engagement with the outer surface of the tubular member 12 at the particular position thereupon. The collar is further provided with a plurality of axially oriented slots 50 longitudinally positioned into or through the main circular portion 32 thereof and radially located behind each pad 48 so that the inner surface thereof receiving the tubular member 12 is able to give slightly so as to accomodate various slight differences in diameter from member to member.

The interrelationship of the collar 18 andthe element 14 is such that the surface 26 of the element is so radially dimensioned so that upon assembly of the two aforementioned components, face 33 of the collar 18 is in abutting relationship with the step 27 of the element 14 such that it forceably engages the foot portions 38 so as to in turn force the teeth 44 into the member 12 and thus firmly anchor the collar and fixed position relative to the member. The penetration of the teeth into the member may be partial as shown in the drawings or complete and is dependent upon the particular material from which the member is made, the primary feature being that sufficient penetration to accomplish the necessary holding action is brought about. Upon completed assembly it should also be noted that the flange 34 is seated upon the step 29.

Means are also provided to positively anchor the element 14 in relationship to the collar 18 in the above described position by ultrasonically welding peripheral portions of the flange 34 to abutting inner surface portions of the base end 22 of the element 14. In this regard step 31 is positioned so as to receive the activating horn of a conventional ultrasonic welding device so as to fuse the above referred to surfaces together resulting in fillet 51 which serves to stake the collar and element 14 together. It should be brought out that inasmuch as the terminal surface portions of the base end 30 of the element serve to contact yarn, such surface could be marred by contact with an ultrasonic horn; accordingly step 31 is preferrably utilized for this purpose. In this manner then the engagement of the collar teeth 44 is assured by means of the cooperation of surface 26 of the element 14.

A construction in which three separate bobbin parts are maintained so as to present an integral bobbin construction equivilant in performance to an unitary unit but one in which the cost is materially reduced and one which furthermore advantageously enables the re-use or recycling of presently available bobbins of known construction and availability is produced. This aforementioned novel bobbin construction enables assembly in a novel manner which lends itself to automation. I

Convenient assembly is accomplished by the provision of a fixture 52 provided with a bore or recess 54 centrally thereof and a-boss 56 upstanding therein. The recess further forms a radial flange 58 of a predetermined height whereupon assembly the base end end 22 of the resultant bobbin will project the desired distance below the base 30 of the element 14 thereof. In practice the fixture is mounted on a piston 60 whereupon the tubular member 12 is positioned over the boss 56 into the recess 54 and the collar 18 is thereupon slid over the tubular member and positioned in a predetermined location therealong by abuttment with the forward portions of the flange 58 contacting a base portions of the collar flange 34. Thereupon the element 14 is firmly grasped as by contact with the engaging surface 64 of a collet 62 and thereafter forceably moved relative to the tubular member 12 and the collar 18.

It is furthermore believed that the detailed manner in which the teeth 44 bitingly engage and displace outer surface portion of the tubular 'member 12 enhance the action by which the resultant assembly resists normally encountered'relative forces which tend to displace the larger or base end of the element 14 forwardly on the tube member as by accidental striking thereof in use as best seen in FIGS. 5a and 5b of the drawings. In FIG. 5a, a slight upward deflection of the terminal foot portions 38 is depicted by the forces departed thereto by the relative motion between the tubular member 12 and the collar 18 by reason of the placement or positioning of the collar thereabout. Once the collar 18 is positioned on the member, the forceful caming action of the inclined surface 26 of the element 14 when such is positioned relative to the other members making up the finished bobbin forces the entire foot portions 38 and the teeth 44 downwardly in a clockwise arc as best shown in FIG. 5b so as to displace a portion of the outer surface of the tube member away. This action tends to further deform and fix the configuration of the teeth 44 to that shown by FIG. 5b wherein a more complete engagement with side portions of the resultant depression in the surface of the tubular member is presented. This action thus'presents a construction equipped to better prevent the more commonly imparted forces to the collar 18 as depicted by the arrow in FIG. 5b from dislodging the collar therefrom.

What is claimed is:

1. A bobbin for receiving strand material comprising,

a generally circular collar positioned on said member and intermediate between said member and said element, said collar having means for positive connection to both said member and said element, said means for connecting said collar to said member comprising a plurality of teeth on an inner surface thereof, said teeth in engagement with outer surface portions of said member, and said collar having forward and base ends correspondingly orientated with said forward and base ends of said member, said collar forward end having a plurality of longitudinally orientated deflectable legs extending therefrom, each of said legs having a terminal foot having upper and lower surfaces, said upper surface in engagement with inner surface portions of said element and said inner surface having an inwardly extending tooth of such connecting means thereon.

2. The bobbin construction of claim 1 wherein said teeth are maintained in engagement with outer surface portions of said member by inner surface portions of said element.

3. The bobbin construction of claim ll wherein the forward portion of the upper surface of each of said terminal feet is chamfered;

4. The bobbin construction of claim 1 wherein said teeth are of generally rectangular configuration having side andbottom wall portions, said bottom wall thereof in generally full contact with portions of said member, said bottom wall of said teeth further being disposed towards said forward end of said member.

5. The bobbin construction of claim 1 wherein said collar base end is provided with a plurality of discrete member contacting pads projecting from the inner surface thereof, said base end further provided with a plurality of longitudinally orientated slots projecting at least partially through said base end and each of said slots radially positioned behind a pad.

Claims

1. A bobbin for receiving strand material comprising, an elongated generally tubular member having forward and base ends, an element having a generally frustro-conical outer strand receiving surface positioned on said base end of said tubular member with the base of said element orientated towards the base of said member to provide a zone of enlarged diameter around said member and a generally circular collar positioned on said member and intermediate between said member and said element, said collar having means for positive connection to both said member and said element, said means for connecting said collar to said member comprising a plurality of teeth on an inner surface thereof, said teeth in engagement with outer surface portions of said member, and said collar having forward and base ends correspondingly orientated with said forward and base ends of said member, said collar forward end having a plurality of longitudinally orientated deflectable legs extending therefrom, each of said legs having a terminal foot having upper and lower surfaces, said upper surface in engagement with inner surface portions of said element and said inner surface having an inwardly extending tooth of such connecting means thereon.

3. The bobbin construction of claim 1 wherein the forward portion of the upper surface of each of said terminal feet is chamfered.

4. The bobbin construction of claim 1 wherein said teeth are of generally rectangular configuration having side and bottom wall portions, said bottom wall thereof in generally full contact with portions of said member, said bottom wall of said teeth further being disposed towards said forward end of said member.