US2474641A - Bobbin tip support means for weft replenishing looms - Google Patents

Description

R. G. TURNER BOBBIN TIP SUPPORT MEANS FOR Jun' 28, 1949.

WEFT REPLENISHING LQOMS Filed July 28, 1948 'IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIL WIIIIAIIl/A INVENTOR RICHARD s. TURNER O m/ W ATTORNEY Patented June 28, 1949 BOBBIN TIP SUPPORT MEANS FOR WEFT REPLENISHING LOOMS Richard G. Turner, Worcester, Mass, assignor to Crompton & Knowles Loom Works, Worcester, Mass., a corporation of Massachusetts Application July 28, 1948, Serial No. 41,037

This invention relates to improvements in weft replenishing looms and it is the general object of the invention to provide improved support means for the bobbin tips of reserve bobbins constructed. in such manner as to avoid abrasion of the Weft ends of the bobbing during weft replenishing operations.

In weft replenishing looms more particularly of the multicolor type it is customary for bobbins to move down guideways by gravity toward transfer position. The weft ends of the bobbins lead to some form of thread holder and are likely to be pinched between the bobbin tip and the support means for the latter when the bobbin is being pushed out of the reserve bobbin magazine into a depleted shuttle. When particularly fine yarns are used the abrasion may be sufiicient to cause breakage with resultant non-threading of the shuttle and loom stoppage.

It is an important object of the present invention to provide roll means for supporting both sides of a bobbin tip and mount one of the roll means so that it can move away from the other to permit passage between them of the bobbin tip.

It is a further object of the invention to provide a roll made of deformable material softer than the bobbin tip into which the fine weft thread can be embedded without serious damage thereto as the bobbin moves between its supports.

In weft replenishing mechanisms of the type to which the invention more particularly relates it is frequently desirable to use either right hand or left hand wound bobbins in either of the stacks of reserve bobbins. As heretofore made the yielding bobbin support of a given stack has been favorable for use of one or the other of these winds, but not both. It is a further object of the invention to provide the magazine with a supporting roll for each side of a bobbin tip so that either right or left hand wound bobbins can be used in either stack.

With these and other objects in View, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts hereinafter described.

, In the accompanying drawings, wherein a convenient embodiment of the invention is set forth,

Fig. 1 is afront elevation of a weft replenishing mechanism having the present invention applied thereto, parts being in cross section,

Fig. 2 is an enlarged elevation of the outer plate of the magazine looking in the direction of arrow 2, Fig. 1, and showing the bobbin tips and part hi the magazine in cross section,

7 Claims. (01. 139-247) 5 two guideways for the tips of the bobbins.

Fig. 3 is an enlarged horizontal section on line 3-3, Fig. 2,

Fig. 4 is an enlarged vertical section on line 4-4, Fig. 3, showing one of the pairs of bobbin supporting rolls, and

Fig. 5 is an enlarged plan view looking in the direction of arrow 5, Fig. 2.

Referring to the drawings, the reserve bobbin magazine M may be supported by means of a stationary pivot stud I and has inner and outer end plates ii and I2, respectively. The magazine will support two groups or stacks of reserve bobbins which feed by gravity to transfer positions. The inner plate has provision for guiding the butts l3 of the reserve bobbins in the magazine, only one bobbin B with its weft W being shown in Fig. 1. The magazine rocks about the stud ID by mechanism not shown herein but well understood so that the lowest bobbin in each stack can be in transfer position under a transferrer arm M.

The outer plate 52 of the magazine is supported by tie rods l deriving their support from the inner plate ll. The outer plate comprises a flat wall it from which project four flanges to define Two of these flanges, H and I8, are spaced to define a groove H) for the tips of the front stack of bobbins, while the other two spaced flanges and 2| define a groove or guideway 22 for the tips of the rear stack of bobbins.

The front of the plate i2 is provided with a guide wire 25 which extends downwardly at an angle to the plate as shown in Fig. 1 and has a lower thread guiding end 26 which is bent upwardly and then inserted into the web 16. In similar manner, a rear wire 21 has its lower yarn guiding end 28 bent upwardly and inserted into web E6. The latter is provided along the bottom thereof with a smooth weft engaging edge 30.

Plate I6 supports a pivot stud on which is mounted for angular movement front and back bobbin tip supports 36 and 31, respectively. Support 36 has its upper end provided with a stop screw 38 held against flange 20 by a small tension spring 39 the upper end of which is held by a clip 40 stationary 0n the magazine. In similar manner, the upper end of the rear bobbin support 31, is provided with a stop screw 41 held against flange it by a light tension spring 42 connected to a second clip 43.

Except for the bottom ends of the guideway forming flanges I1 and 2|, and the lower parts of the bobbin supports 36 and 31, the matter thus far described may be of common construction and operate in the usual manner. a l

In carrying the invention into effect provision is made for permitting the lowest bobbin tip of each stack of bobbins to rest on two rolls one of which preferably has its axis fixed with respect to the magazine and the other of which is rotatably mounted on a bobbin support.

Referring particularly to Fig. Bathe front bobbin support 36 carries a stud 50 on which is rota tably mounted a roll 5| made preferably of a compressible material softer than the tip of the bdb y bin, such as hard pressed felt... Web lfihas secured thereto a stud 52 on which is rotatablymounted a roll 53 similar to roll 5|. A sleeve 54 between the web l6 and the roll 53 :keepsthealatterspaced from the web and in substantiall efilignm nt with roll 5|. The tip of the bottom fron t' btibbiii is shown in section at 55 and I BStiSwOn t'hQI'QH S 5| and 53. The rear support 31 carries a stud "60 which supports a roll 6| for rotation, amistuiis-tz secured to the web l6..has rotatable thereon a fourth roll '63 spaced from the :web :16 by 1a sleeve or collar 64. The tip 68 of the rear bottom'ibobbin rests on rolls '6 l and :63.

i I h'e rolls'5'l, 53-, '61 and 63 =are preferabl y-all alike and of the same size #andniadeof aw-oomipressible material soiter -than'the tips oi 'the bobbins, such as rubber or fibrous pressed--felt. EachJrol-l has a bore'65 toreceive the corresponding stud, and this bore is:=hardened by hav ing'the felt orwsimilar fibrous niat'eri'a lciimpregnated by some material, 511011135 a plastic; whichwill provide 'a relatively hard-inner shell-r65 to serve as a=bearing for engagernentwith the corresponding stud. "The shelh'fiii is confinedwto the central @parts of the roll and vdoinot:extend-torthe bobbin engaging periphery '6 Ofdt'he :roll. w'llhe rolls are arranged in pairs, rolls-5lrand 53ibeingwthe 'iront pair for the firont stack -or .guideways I5, while the other-rolls 'G IE and-63 -:form the rearpair for gnideway 22. :One roll of each pain-rotates about a fixed axis and the other rollmof each pair is mounted 'on a bobbin supportrca-pable-of yielding against spring action; as will be apparent from Fig. 2. The lower ends of the outsidelfianges +1Liand 2! --are somewhat shorter thansin previous -reserv'e "bobbin magazines of a the-' .generaL :type shown "herein in order ,tomake room for: the iron't anol back 'rolls 53' :and-63.

' When reserve bobbins: are placed in the-lmagazine their weft ends aredrawrr off to the- -right @of :plate l2 as viewed in Eig. :1 and -attaohed to some form of thread holder which is not shown herein. This 'threadholder may hold the w'weft -ends. taut so that they extendfrom -theirlbobbins "around their respective wires" -and:-2 |.-.and.then outwardly away from the magazine towardwthe right, Fig. '1. As the bobbins descend in' their stacks and approach their-respective transfer positions the weft ends I may become -slaok enough "to slip off the lower ends 26: and-= 28of'theguide wires 25 and 2 1,111 which event the weft-ends will extend from "the bo'bb'in tips :down along-one or 1 the other ofthe associated supporting :rolls,-and

tip 55 should become dislodged-fromguide-wire-25 :it-will extend down between tip=55 and one-ora the -other-ofthe=rolls 5| or 53,-and then-around the guide edge 30. At transfer this threadhnay ibe subjected to some pressure, (and if it is it will :be

embedded into one-of=therolls supponting tip 55 and not be abraded or subjected to any crushing action which would otherwise weaken it. Similarly, a weft end extending from the bottomtip 68 may extend along one or the other of the rolls of the rear pair and be embedded into it without being damaged.

' the; past -I havenprornzased. that: rolls be mounted on (the bottoms of the support arms for the bobbin tips, such as those shown herein 'at .86 and 31, but such rolls were metallic and were ..harder.thanthebobbin tips and although they ialled oriturne'd'ontheir axes to prevent a scraping or abrading action on the yarn the latter nev- -er.t-lma'less was -subjected to some compression.

' Such -rollsfaverephown for instance in my prior When mollsare used on the bobbin supports only some di'fiiculty may arise due to the direction ermine 'Yof the weft on the bobbins. If, for instance, the bottom front bobbin is wound in asueh: manner athatv :its weft end F rrleads: idnwnlwardlydromwthe lleftr side. of. thejtip 55 it -will then-engage roll '5! and ebesparedany appreciable #deterior ation growingaout of trans-fer of thevbob- :bin. 11, on t'hewether --hand,-the :wefti is;- -opp0- .sitel-y wound it will..-leaddown between: the :bob-

bin tip and the roll 53 and will similarly-be spared an-y damaging. compression or: distortion of its filaments, .eAs-set forth. in myz-prior .patent a bobbinwound the manner. last adescribed wouldbe required to move-along theflange al 'l,

but asset iorth-nhereinuth-is flanges-has "been shortened to .make. .room ifior .roll l53. .The. .;bot-- -tom bobbin of. the frontsstack can therefore mbe wound. either -rightflhand orJleft ihand andits weft will be equally protected byone or the-other bobbin can be wound "either right or left hand,

andthis :is true .for-the ibo'bbins oflboth stacks. :From. the .lfloregoing v it will b'e. seen 'thatBthe invention sets forth simple means lby w'hic'h .delil'cate weft ,yarns may be protected during a bob- '"bin' transferring..o'perationpthe means compris- 'ing a pair of 'roll'slfor each-'bobbinjtip, each-roll being free 'to' rotate .on' 'its axis fin..response'to "frictional co'ntactwit'h the bobbin tip, an'd'being preferably so constructed that the weft ,yarn can 'be embedded into it it it caught "betweenfthe bobbin tip 'andtthe run; "It will also baseen that "the magazine can. operate with bobbins of neither right hand orleft ha'nd'iiwind; in' either the front parentfr'oni Fig. "2. "Vl/"hil'e-two rolls have been provided for each bdbbintip --trans'fer-' posit iomthe invention is not necessaz ily liinited to this rarran'gementysince tnenrelat'ivelyiso'ft :rc'om- 3 6 and- 311.;respectively; have advantagesv inde pendent of the .lrollss53 and 63-, theseadvantages growing out ofthe ---fact that the rolls (on the z-sup- 1301135 are made: of a. oompressibleofibrous mate- -:rial soft enoughstoihavefidelioatexyarns embedded 5 into them by a bobbin. tipfl tinea-repmriishing operation. Also, the rolls may if desired have their bores 65 hardened by treatment with or application of an appropriate material, such as a plastic, applied either in fluid form and drying later, or applied by heat. In either event the roll has an inner shell which resists wearing when turning on its associated stud, but this shell does not extend to the periphery of the roll and the latter remains soft and possessed of the advantages already mentioned.

Having thus described the invention it will be seen that changes and modifications of the foregoin specific disclosure may be made without departing from the spirit and scope of the invention.

What is claimed as new is:

1. In. a weft replenishing mechanism provided with a stack of bobbins which move down a guide-- way by gravity toward transfer position, a resiliently mounted bobbin tip support, a roll rotatably mounted on said support near the bottom of said guideway, and a second roll spaced from the first roll and rotatably mounted on the mechanism near the bottom of said guideway, the tip of the bottom bobbin of the stack resting on said rolls, the weft end of the bottom bobbin passing between said tip and one or the other of said rolls, and the latter being rotated by said tip at the time of bobbin transfer to prevent abrasion of said weft end.

2. In a weft replenishing mechanism having a stack of bobbins which move by gravity down a guideway toward transfer position, a pair of rolls located at the lower end of the guideway, means mountin one of said rolls for rotation about an axis fixed with respect to the mechanism, and a resiliently mounted bobbin tip support pivoted with respect to the mechanism and having the other roll rotatably mounted thereon, said rolls supporting the tip of the lowest bobbin in the stack and the weft end of the bobbin, depending upon the direction of Wind of the weft on the bobbin, passing between said tip and one or the other of said rolls, said rolls being rotated by a bobbin being transferred to prevent abrasion of the weft end regardless of which roll engages said Weft end.

i 3. In a weft replenishing mechanism having a stack of bobbins which move down a guideway by gravity toward a transfer position, a roll rotatably mounted on the mechanism near the bottom of said guideway for engagement with one side of the tip of the lowest bobbin in the stack, a second roll near the bottom of said guideway located for engagement with the other side of the tip of the lowest bobbin in the stack, the weft end of the bobbin engaging one or the other of said rolls, depending upon the direction in which the weft is wound on the bobbin, and a resiliently mounted support for the second roll, said rolls normally supporting the bobbin but said second roll due to the resilient mounting thereof moving away from the first roll when the bobbin is transferred and said rolls rotating to prevent abrasion of the weft end.

4. In a weft replenishing mechanism provided with a stack of bobbins which move down a guideway by gravity to a transfer position, a pair of rolls located at the bottom of the guideway, each roll being made of fibrous material softer than the tip of the lowest bobbin in the stack, means mounting one of said rolls for rotation about an axis fixed with respect to the mechanism, and resiliently mounted means on which the other roll is rotatably supported, said resilient means normally holding said other roll stationary relatively to said one roll but being movable in a direction away from said one roll, said rolls normally positioned to support the tip of the lowest bobbin in the stack and the weft end of said lowest bobbin passing between the tip thereof and one of said rolls, said bobbin when transferred causing rotation of said rolls and embedment of said weft end into the roll engaging the same to abrasion of the weft end.

5. In a weft replenishing mechanism having a stack of bobbins which move down a guideway by gravity toward a transfer position, a pair of spaced rolls located at the bottom of the guideway and positioned normally to support the tip of the lowest bobbin in the stack, one of said rolls being rotatably mounted with respect to the mechanism and engaging one side of said tip, and resiliently mounted support means on the mechanism supporting the other roll for rotation thereon and holding said other roll in position to engage the other side of said tip, said rolls being made of pressed felt softer than the said tip, the weft end of the lowest bobbin in the stack passing between said tip and one of said rolls, depending upon the direction of wind of weft on the bobbin, and being embedded into the roll engaged therewith to prevent abrasion of the weft end when the lowest bobbin in the stack is transferred.

6. A bobbin tip support for a weft replenishing mechanism, said support having provision for pivotal mounting on the mechanism and having a stud thereon on which is rotatably mounted a bobbin engaging roll made of a fibrous compressible material, said roll having a bore the surface of which is impregnated with a material harder than the roll and forming a shell to engage the stud but spaced from the periphery of the roll.

7. A bobbin tip support for a weft replenishing mechanism, said support having provision for pivotal mounting on the mechanism and having a stud thereon on which is rotatably mounted a bobbin engaging roll made of a hard pressed fibrous compressible material, said roll having a bore the surface of which is impregnated with a plastic compound harder than the roll to provide a bearing for engagement with said stud, said material forming a, shell which is spaced from the bobbin engagin periphery of the roll.

RICHARD G. TURNER.

prevent REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 591,998 Burton Oct. 19, 1897 2,116,159 Rogers May 3, 1938 2,418,079 Leake Mar. 25, 1947

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