US3025886A - Filling carrier for shuttleless looms - Google Patents

Description

March 20, 1962 A. vlLLANl 3,025,886

FILLING CARRIER FOR SHUTTLELESS LOOMS Filed April 1a, 1960 12 /11 47 l5/2 1/5 -fj' Pfl H 'l f -J- il-:LL ISL-: hggg hifi' 8 3,025,836 FLLING CARRHER FR SHUTTLELESS LGMS Antonio Villani, Milford, Mass., assigner to Draper Corporation, Hopedale, Mass., a corporation of Maine Filed Apr. 18, 1960, Ser. No. 22,912 3 Claims. (Cl. 139-122) This invention pertains to improvements in a filling carrier for use in shuttleless looms, that is, in looms of a type in which the filling yarn is supplied from a source outside of the shuttle or filling inserting means itself.

It is a general object of the invention to provide a positive tensioning means within the filling extending carrier common in looms of the type herein described.

It is a further object of the invention to provide as the tensioning means simple, inexpensive and easily replaceable tension pads such as the type used in shuttle eyes of fiy shuttle looms.

4It is a further object of the invention to control the tension of the filling yarn being extended by providing a means to adjust separately the tension pads.

It is a further object of the invention to provide a filling receiving carrier which in a positive manner will eliminate unthreading after the filling has been received by that carreir and before it has become engaged with hooked members provided therein as the direction of travel of the carrier is being reversed.

Other objects will become apparent from the following disclosure.

In shuttleless looms, that is, the type of loom in which filling yarn is supplied from an outside source and is not carried to and fro through the shed by means of a shuttle or the carrier itself, it is common practice to insert each pick of filling by two reciprocating elements, one of which may be referred to hereinafter as an inserter or inserting member and the other of which receives or has transferred to it that loop of filling projected into the shed by the first member and which may hereinafter be referred to as a filling receiving or filling extending carrier. The latter member is generally provided with a hooked element vby which the filling is seized and trapped and through which or past which, the filling may move so that the action of the carrier to which the inserted loop is transferred is one of merely drawing through or extending an end which will have been severed to the required length necessary to complete the pick. It is the general practice to employ some sort of tensioning means functioning in cooperation with the hooked member on filling extending carriers of this nature and to illustrate more clearly this type of carrier, attention is hereby drawn to patents numbered 2,586,638 and 2,705,508.

The tensioning means for carriers made prior to the current invention have been of the type which employ strip spring material, and which are fixedly positioned at one end and the opposite end of which is so designed that the forces of tension are directed towards that portion of the carrier which traps, tensions and guides the inserted loop of filling as it is being extended.

According to the invention a filling receiving and extending carrier is so devised as to effect its intended function by means of a pair of adjustable tension pads juxtapositioned between the forward part of the main body members of the carrier itself. These tension pads extend in back as well as in front of hooked members of the carrier that are located in the upper and lower surfaces thereof.

The invention will hereinafter be described in greater detail by reference to the accompanying figures of drawing in which:

FIG. 1 is a plan view of the filling receiving and cxtending carrier showing location of the tension pads in aired tates @arent relationship to the hooked member of the forward upper surface.

FIG. 2 is an elevation of that carrier shown in FIG. 1.

FIG. 3 is a bottom View of that carrier shown in FIG. l, showing the tension pads in relationship to the hooked member of the forward lower surface.

FIG. 4 is an exploded view of the filling receiving and extending carrier Showing its various component parts.

FIG. 5 is a sectional view taken at line 5-5 of FIG. 2.

FIG. 6 is a sectional view taken at line 6 6 of FIG. 2.

The method of opertaion of so-called shuttleless looms and the actual means of extending a length of filling through the warp shed are well known to those conversant with this art; therefore, it is considered satisfactory at this point to call attention to a number of patents which are illustrative of the type of loom to which the present invention can be applied.

Reference is hereby made to the information disclosed in patents numbered 1,515,102; 1,883,354; 2,191,376 and 2,604,123.

Now referring to the figures of drawing, -fiexible carriers or tapes 10 are used to reciprocate the thread carrying members themselves which are caused to enter the shed and to be withdrawn therefrom, extending inwardly to a point somewhere adjacent to the center of the shed of the fabric at which the filling extending carrier meets the inserting carrier to transfer the filling thread to be drawn through the remainder of the shed.

Attached by some suitable means to the tape 10 is a filling gripping or extending member generally indicated by numeral 11 which comprises a pair of complementary body members 12 and 13 shown in FIG. 4 and which when assembled form and function as a single unit. Body member 12 consists of a vertical side plate 14 which at its leading end terminates in the form of a point 15. The vertical plate 12 has at its top portion a substantially fiat, laterally extending top surface 16 which when assembled with body member 13 fits into its mating surface 17 that is shaped in the form of a step and which extends approximately the entire length of said body member.

Body member 13 is very similar in design to body membei- 12 in that it comprises a vertical side plate 18 which also at its leading end terminates in the form of a point 19. In a manner reverse to that of body member 12, member 13 has a bottom surface 20 which extends laterally therefrom and when assembled as a unit it seats in the mating surface 21 that is positioned on the underside of body member 12 as shown in FIG. 5. Vertical plate 18 of member 13 has at its approximate center and at a point approximately midway between said center and its trailing edge, two countersunk holes 22 and 23 through which screws 24 and 25 pass and assemble in the two tapped holes 26 and 27 which are machined through vertical plate 14 and which are located in mating positions with holes 22 and 23. The assembled unit generally indicated by numeral 11 or which can now be referred to as the filling extending carrier itself has its leading ends or thread engaging and trapping members 2S and 29 so disposed as to provide for assembly of adjustably mounted tension pads 30 and 31 therebetween. These tension pads as assembled have their leading ends 32 and 33 bent outwardly and which are formed in the shape of a U by folding the upper and lower surfaces thereof rearwardly. Ends 32 and 33 assemble and fioat freely in holes 34 and 35 which are positioned adjacent to points 15 and 19 of body members 12 and 13. Adjacent to the rearward end of tension pads 30 and 31 are holes 36 and 37 through which a pin 38 of a somewhat smaller diameter passes and extends from either end thereof into holes 39 and 40 in body members 12 and 13. These holes are so positioned as to insure proper floating assembly of said pin u) through said tension pads. These tension pads have a means for varying the tension that is exerted on a length of filling through use of small compression springs 41 and 42 which rest in the outer cupped portion of tension pads 30 and 31. The opposite ends of each of these springs seat in slight recesses formed in the tips of headless set screws 43 and 44 and assemble in tapped holes 45 and 46 that are positioned at a point approximately midway between holes 34 and 39 of body member 12 and holes 35 and 40 of body member 13. The tension of springs assembled in this manner can be varied by simply turning the set screws 43 and 44 inwardly or outwardly which in turn will increase or decrease the forces being exerted inwardly on the tension pads 30 and 31.

This means for varying and maintaining a given amount of tension need not be limited to the method described above, but may be accomplished in a number of ways, one example of which is illustrated and described in United States Patent No. 2,859,779.

The filling extending carrier generally indicated by numeral 11 includes at its forward end a pair of opposed thread engaging hooks 47 and 48 which are formed in the upper and lower surfaces thereof and are situated in such a position as to place them directly above and below the approximate center of the juxtapositioned tension pads 30 and 31. Hook 47 which is formed in the forward portion of the laterally extending surface 16 of body member 12 overlies said tension p-ads and a taper is formed from the point of the hook gradually forwardly to point 15 thus forming the thread engaging members 28 therebetween. Hook 48 is constructed in the reverse of the latter in that it is formed in the bottom surface which extends laterally from body 13 and underlies the tensioning members hereinbefore described. As with hook 47, the point of the hook 48 tapers gradually forwardly to point 19 thus forming the thread engaging member 29 therebetween. As shown in FIG. 4 openings 49 and 50 are formed directly in back of the thread engaging hooks 47 and 48 into which the transferred loop of filling passes and is trapped before becoming engaged with hooks 47 and 48 as the lling extending carrier reverses its direction of motion to draw the filling through the remainder of the shed.

The trailing end 51 of the filling extending carrier itself, FIG. 2, is tapered so as to blend with the tape 10 thereof to which it is attached. Additionally the forward end of tape 10 tapers inwardly to conform dimensionally with the trailing end 51 (FIGS. l and 3).

In operation, the carrier enters the shed without interference with warp threads due to its entire forward end being properly tapered as shown in FIG. 2. It meets the inserting' carrier approximately midway in the shed and the filling presented by that member enters the extending carrier being guided by the thread engaging members 28 and 29 and thence between the tension pads 30 and 31 into openings 49 and 5f) where it is trapped and held under tension. Pin 38 which supports said tensioning meml bers adjacent to their trailing ends also serves as a stop to prevent a newly transferred loop of lling from going beyond its desired positions. Filling meetsl very little resistance while entering the carrier but when it has become trapped and the carrier reverses its direction of motion the filling is so controlled or guided that the severed end is drawn between the tension pads and across engaging hooks 47 and 4S making it impossible for a lling thread to escape or for the carrier to become unthreaded.

The vertical side plates 14 and 18 of the main body members extend slightly above the laterally extending top surface 16 of body member 12 for the purpose of decreasing the amount of surface contact as well as providing a thread channel for the filling thread to be drawn through, free from interference by the upper warp sheet during closing of the shed and Withdrawal of the carrier therefrom.

Since the open end of pads 30 and 31 is directed toward the end of the carrier, it is necessary for this carrier to enter the inserting carrier only a very short distance in order to pick up or receive the filling.

While one embodiment of the invention has been disclosed, it is to be understood that the inventive concept may be carried out in a number of ways. This invention is, therefore, not to be limited to the precise details described, but is intended to embrace all variations and modifications thereof falling within the spirit of the invention and the scope of the claims.

I claim:

l. For a shuttleless loom, a. filling extending carrier for receiving a filling yarn from an inserting carrier which has introduced said yarn part way into a shed and for extending that yarn through the remainder of the shed which comprises a pair of opposed, relatively fixed body members having generally horizontally disposed upper and lower surfaces extending therebetween, filling guiding and trapping members formed at the leading end of said surfaces, a pair of opposed, floatingly mounted tension pads presenting vertically extending tension surfaces adapted to allow said filling yarn to be drawn therethrough under tension as said carrier is traversing said loom, and yieldable means adjacent each said pad for urging said surfaces into contact with each other.

2. The carrier of claim 1, wherein `said yieldable means comprise adjustable springs.

3. The carrier of claim 1 wherein means is provided to restrict the filling yarn within the tension pads as it is being drawn therethrough.

References Cited in the le of this patent UNITED STATES PATENTS 975,051 Palme Nov. 8, 1910 1,026,298 Blanchard May 14, 1912 2,192,728 Dewas Mar. 5, 1940 2,923,325 Dewas Feb. 2, 1960 f attr

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