US2184088A - Knitting machine - Google Patents

Description

M. WEINBERG Filed June 29, 1938 2 Sheets-Sheet 1 lNVENT R A I 9 6 ATTORNEY Dec. 19, 193. M. WEIN BERG KNITTING MACHINE Filed June 29, 1938 2 Sheets-Sheet 2 W. 40.. 0 F Y I Q Q JW x i @i O m %7 IAH V 8 x In. T w .n m M \1 w fl H 1 B u atented Dec. 19, 1939 PATENT OFFICE KNITTING MAcnmE Max Weinberg, New York, N. Y., assignor to Max Weinberg Knitting 00., Inc., Brooklyn, N. Y.

Application June 29, 1938, Serial No.- 216,536

5 Claims.

This invention relates to knitting machines. It is particularly directed to a machine for making knitted velvet, and the like purposes.

An object of this invention isto provide in a knitting machine of the character described, means for knitting with a double yarn, means for producing loops at spaced intervals with one of the yarns, and means for splitting said loops during the knitting operation to produce a knitted velvet cloth.

A further object of this invention is to provide a compact and rugged machine of the character described, which shall be smooth and positive in operation, easy to assemble, which will produce an attractive velvet knitted cloth, and yet. be I practical and eflicient to a high degree in use.

Other 'objectsof this invention will in part be obvious and in part hereinafter-pointed out.

The invention accordingly consists in the features of construction, combinationsof elements, and arrangement of parts which will be exemplilied in the construction hereinafter described, and of which the scope of application will .be indicated in the following claims.

In the accompanying drawings, in which is shown one of the various possible illustrative embodiments of this invention,

Fig. 1 is a top, perspective view of a portion of a knitting machine, embodying the invention, with the sinker cam and presser bars removed;

Fig. 2 is an elevational, radial, cross-sectional view through a portion of the machine just after the yarn'is fed to the machine.

Fig. 3 is a view similar to Fig. 2, but illustrating the position where the knitting needles come down, and "the beard of the needle isclosed by the presser bar, to pull down the. yarn on the sinkers;

Fig. 4 is an inside, elevational view of a portion of the machine when the knitting needles are in their downmost position, after casting 011 one set of yarns and pulling down another set of yarns;

Fig. 5 is a view similar to Fig. 4, but showing the needles in their uppermost position, after the needles have again been moved upwardly, and illustrating the cutting or splitting of a loop;

Fig. 6 is a view similar to Fig. 2, and illustrating the cutting of a loop;

Fig. 7 is a side, elevational view of' one of the regular sinkers;

Fig. 8 is a side, elevational view of one of the loop cutting sinkers; and

Fig. 9 is a plan view illustrating a piece of the knitted velvet made with the machine embodying the invention.

Referring now in detail to the drawing, it designates a portion of a circular rotary knitting machine. The same comprises an inner cylindrical rotary needle ring H, and an outer cylindrical cam ring l2, spaced from the needle ring, and provided with cams l3 fixed thereto and projecting toward said needle ring, for raising and lowering the'knitting needles It in desired phase, as will appear hereinafter.

The knitting needles M are each provided with a vertical shank [5 having an outwardly and .downwardly bent beard I6, at its upper end, and a radially outwardly projecting butt ll, at its lower end, adapted to be engaged by the cams it, for vertically moving the needles up or down. The knitting needles It are slidably mounted in spaced vertical slots it in the rotary needle ring ll, whereby said needles rotate about the amt of said ring.

Fixed to the upper edges of the outer fixed cylinder or ring [2 is a flat annular ring 2% e x t e n d i n g outwardly therefrom. Rotatably mounted on the ring 20 is a ring ill on which are slidably mounted a plurality of radial equally spaced sinkers 23 and 2 3, alternating between the needles it. Thus, there is one sinker between each pair of adjacent needles.

Two types of sinkers are employed, the regular sinker 23 shown in Fig. 7, and the loop cutting or splitting sinker 2d shown in Fig. 8. Every fourth sinker is a cutting sinker 2 1 for cutting or splitting loops, in the manner hereinafter explained. Hence, between every pair of adjacent cutting sinkers 2 3 are three sinkers 23, which are not provided with means for cutting the yarn. The sinkers are slidable radially on member 26 between needles id, in the manner, and for the purpose hereinafter appearing.

The sinkers 23 are flat and have a straight bottom edge 25 contacting the top of the ring 2t. Each of said sinkers is provided with an upwardly extending projection 26 for engagement with a sinker cam, as will be explained hereinafter. Each-sinker 23 furthermore has a projection 28, formed at the inner end thereof, with a pair of V- shaped grooves 29 and 30. The groove 29 is disposed above the groove30, and radially inwardly of said groove.

The sinker 24 is similar to the sinker 23, except that the top of the projection 28 is cut away to form a curved knife edge or cutter 3|. The sinker 24 hence has only one V-shaped groove 30, similar to the V'-shaped groove 30 of the sinker 23. All of the sinkers are disposed in machine. I Fixed to the ring 2| in any suitable manner,

' and overlying the sinkers 23. 24, are sinker cams 34 formed with cam grooves 35 receiving the projections 26, for radially moving the sinkers inwardl'yf and outwardly in a predetermined" sequence or phase relative to the up and down movement of the knitting needles l4 by the cams l3, as the needles and sinkers rotate about the vertical axis of the machine. Cams 24 may be made in similar, repeated removable sections, one of which operates with the portion or the machine shown in Fig. 1.

Within the space 38, between the needle rin II and the cam ring l2, and above the cams l3, and in back of each needle I4, is a vertical presser bar 31, disposed between each pair of adjacent sinkers 23 or 24-. The upper endsof the presser bars are normally held away from the beards it of the needles M, by an annular coil tension spring 38 engaging within notches 39 in the lower ends of said bars, in the well known manner.

Fixed to each section of the cam plate 24 Ba presser cam 40 adapted to press the upper ends of the presser bars inwardly to close the beards I when the needles are pulled downwardly, as shown in Fig. 3 of the drawings, to permit the needles to cast off the stitches already made.

The needles I4. as well as the sinkers 23, 24, and the presser bars 31, are disposed entirely around the cylindrical machine, and rotate about the axis of said machine. The fixed needle cams, sinker cams, and presser cams are repeated any suitable number of times around themachine to repeat the knitting operation as many times as yarn is fed to the machine.

In Fig. I there is shown one section of the machine indicating one complete phase 01. operation. In said figure. the presser bars and presser cam have been omitted for the sake of clearness. In Fig. 1 thereis shown a pair of yarns A and B ied to the machine at-repeated intervals around the machine, the same number of times as the needle cams, sinker cams and presser cams are repeated. In said figure, the arrow indicates the direction of movement of the needles and sinkers around the axis of the machine. The letters A and B indicate double yarn or threads fed to the machine at one phase, and A, 13' indicate threatk which were fed to the machine at a previous phase, it being understood that the action illus tion, and the upper ends of the presser bars are heldbackawayirombeardsl8,bythecoll spring 38.

As the machine and sinkers continue moving in the direction of the arrow of Fig. l, the-sinker cam34 movesthesinkersradlallyinwardly between the knitting needles [,4 to the position showninFlg.2oithedi-awings. Astheneedles and sinkers continue moving further, the needle camlabetopulltheneedlesdownwardiy,

and the presser cam 40 moves the presser bars against the beards I6 01 the needles, as shown in Fig. 3 of the drawinga'the yarns A and B being caught within said beards. As the needles continue rotating further they are pulled downwardly to pull the yarns A and B out of the grooves 29 and 30 of the regular sinkers 23, and the yarn A of! the cutting sinkers 24. The yarns A and B are then pulled through the previousstitching made by yarns A and B, during the casting oil operation. The yarn B is not pulled oil! the cutting sinkers 24 however, being looped presser cam is located at the place where the knitting needles are pulled downwardly to permit the casting oil operation.

At the cast off point, the sinkers are pulled back somewhat by the sinker cam to relieve the tension oi the thread during the casting oiI operation. After the casting oii operation, the needles are again moved upwardly by the needle cam, and the sinkers are held in the position shown in Fig. 3, until the needles reach the position shown in Figs. 5 and 6 of the drawings, where the sinker cams are again pulled back so that the inner upwardly curved portion of the cutting edge 3| of the cutting sinkersv 24, will sever the looped portions of the yarn B resting on said cutting sinkers, to produce a pair oi cut ends 0 every i.'ourth loop on yarn B. The cutting of the yarn is done at the point marked X in Fig. 1 of the drawings. v

Thereafter, the sinkers are pulled a little further back and two additional yarns are again fed to be engaged within the grooves 29 and 30 of the sinkers 22, 24; and the action described above is repeated.

It will be noted that every fourth loop of one yarn is split during the knitting operation, the other yarn of the same loop serving to hold the cloth together.

Heretofore knitted velvet has been made by first knitting cloth with icon and thereafter removing the cloth from the knitting machine and cutting oil. the tops of the loops. With the improved machine disclosed herein, the cloth comes out. 7

Although the machine herein described illustrates three regular sinkers 23 interposed between a pair of adjacent cutting sinkers 24 to produce three imcut loops of double yarn between each pair of cut loops, any suitable number of sinkers 123 may be interposed between the cutting sinkers, it merely being necessary to produce enough uncut stitches or loops between the cut loops s0 loops will not pull out between the cut loops.

some sections of the machine may be provided only with regular sinkers to make cloth having sections with uncut loops.

It will thus be seen that there is provided a device in which the several objects ofthis invention are achieved, and which is well adapted to meet the conditions of practical use.

irom the machine with the loops already that the pieces of cut yarn B between the split hill various possible embodiments might be made of the above invention, and as various changes might be made in the embodiment above set forth, it is to be understood-that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

i. In a circular, rotary knitting machine, a. cylindrical needle ring, means for rotating the same, a plurality of spaced knitting needles mounted on said ring for vertical sliding movement thereon, cam'means for reciprocating said needles as said ring rotates with said needles, an annular ring fixed to said needle ring for rotation therewith, sinkers alternating with said needles, mounted on'said ring for radial horizontal siiding movement, cam means to reciprocate said sinkers, certain of said sinkers having a pair of notches spaced, one .at a higher level than the other, other sinkers located between a pair of the first sinkers having a notch similar to the lower oi the pair of notches on said first sinkers, and a cutting edge above said notch and below the level of the higher notches in said first sinkers,

' means ior feeding a pair of yarns between said sinkers and needles, the lower notches of the first sinkers and the notches of the second mentioned sinkers being adapted to receive one of said yarns, the upper notches of said first sinkers being adapted to receive the other of said yarns, the cutting edges of said second sinkers being adapted to move beneath said second yarn and to out said yarn, upon reciprocating the second sinkers.

2. In a knitting machineior making knitted velvet, thecombination of knitting needles having beards, means for reciprocating the same,

siers between said needles, means for recipro eating said sinkers in a direction transverse to the direction of reciprocation of said needles, Presser bars behind said needles, means for moving said presser bars to close the beards of said needles, when said needles are moved downwardly to cast ofi, means to feed a double yarn between said sers and needles, each of certain of said sinkers being provided with a plurality of notches to receive said yarns, each of other of said sinkers being provided with a cutting edge adapted to cut loops formed on one of said yarns, and with a notch to receive the other yarn, there being one or more sink'ers with double notches between each pair oi adjacent sinkers with the cutting ees.

3. In a circular, rotary knitting machine, a cylindrical needle ring, means iorrotating the same, a plurality of spaced vertical knittingneedies formed with beards, mounted on said ring tor vertical sliding movement thereon, fixed cam means for reciprocating said needles as said ring rotates, a fiat annular ring fixed to said needle ring for rotation therewith, horizontal sinkers disposed between each pair of adjacent needles and mounted on said last mentioned ring for radial sliding movement, fixed means to reciprocate said sinkers horizontally, means for feeding a pair of yarns between said sinkers and needles, each of certain of said sinkers having a pair of notches adapted to receive said pair of yarns, each of other of said sinkers located between a pair of said first mentioned sinkers, having one notch to receive one of the yards, and a cutting edge for cutting the other of said yarns.

4. In a knitting machine, a plurality of spaced knitting needles, sinkers alternating with said needles, means for reciprocating said sinkers, certain of said sinkers having a pair of notches spaced one at a higher level than the other, the upper notch in each of said sinkers being spaced longitudinally from the lower notch, longitudinally of the other sinker, other sinkers located between a pair of the first sinkers,-having a notch similar to the lower of the pair of notches of the first sinkers, and a cutting edge above said lower.

cylindrical, needle ring, means for rotating the same, a plurality of spaced knitting needles mounted on said ring for vertical sliding movement thereon, cam means for reciprocating said needles as said ring rotates, sinkers alternating with said needles mounted on said ring for radial sliding movement, cam means to reciprocate said sinkers, certain of said sinkers having a pair oi notches spaced one at a higher level-than the other, the higher level notches being located radially inwardly of the lower level notches, other sinkers located between a pair of the first sinkers, each having a notch similar to the lower of the pair of notches on the first sinkers, and a cutting edge above said notch, means for feeding a pair of yarns between said sinkers and needles, the lower notches of the first sinkers and the notches of the second sinkers being adapted to receive one of said yarns, the upper notches of the first sinkers being adapted to receive the other of said yams, the cutting edges 01' the second sinkers being adapted to cut said other yarn upon reciprocating said second sinkers.

Images