US2083377A - Auxiliary presser for flat knitting machines - Google Patents

Description

June 8, 1937. w. HElNlTZ 2,083,377

AUXILIARY PRESSER FOR FLAT KNITTING MACHINES Fil ed Dec. 17, 1935 3 Sheets-Sheet l Fllfl FIE/1 3 b l v fm e mors WOLDEMARIHEINITZ I By 2 ML ATTORNEY June 8, 1937. w. HEINlTZ AUXILIARY PRESSER FOR FLAT KNITTING MACHINES 5 Sheets-Sheet 2 Filed Dec. 17, 1935 ATTORNEY W. HElNlTZ June 8, 1937.

AUXILIARY PRESSER FOR FLAT KNITTING MACHINES Filed Dec. '17, 1935 5 Sheets-Sheet 5 [/1 en/ 0r: WOLDEMAH HEINITZ ATTORNEY Patented June 8,' 1937 UNITED STATES PATENT OFFICE AUXILIARY rnng sgz t FOR FLAT KNITTING HINES Waldemar Heinitz, Chemnitz, Germany, asslgnor to Schubert & Salzer Maschinenfabrik Aktien gesellschaft, 'Chemnitz, Germany Application December 1'1, 1935, Serial No. 54,905

. In Germany December 17, 1934 2 Claims.

The present invention relates to flat knittin the manufacture of the heel portions of stockings are known already. Moreover, it has already been proposed to subdivide neither the needle 10 bar nor the presser, but to provide, in the range of the heel portions, a special presser which is brought into operative position duringthe manufacture of the heel portions only.

According to the present invention the aux-- 15 iliary presser is used also for the formation of beginning or starting rows of loops. The auxiliary presser according to the invention consists of a presser comb carrying two kinds of press instruments which alternate with each other. The one-kind of press instruments has a longer head than the other kind of instruments.

The presser comb may be'lifted into two different operative positions. In its uppermost position, the press points of both kinds of press instruments, i. e. of the-press instruments having a long head as well as of the press instruments having a short head, lie in the level ofthe heads of the frame needles, so that allframe needles are pressed. In an intermediate position, the press instruments having a long head. only are lifted so far, that their press point is situated in the level of the heads of the frame needles. 'Consequently the frame needles coordinated to the press instruments having along head only are 5 pressed, while the press instruments provided with a short head and situateth below the heads of the frame needles are prevented from pressing their frame needles. During the manufacture of the leg portion of a stocking, theauxillary 40 presser is withdrawn and occupies a position below the presser edge proper of the knitting machine. During the manufacture of the heel portions, the auxiliary presser is brought in front of the presser edge, so that all frame needles used 45 for forming the loops of the heel portions are 1 pressed. During the manufacture of the starting or beginning rows of loops of the sole portions, the auxiliary presser is brought in front of the presser edge, so that only the one kind of 50 press instruments, i. e. those provided with a long head, operate. During the manufacture of the sole portions, the" auxiliary presser is again withdrawn below the presser edge proper, In the accompanying drawings one embodiment of he invention is shown by way of example.

In these drawings: Fig. l'shows a part sectional side elevation of the auxiliary presser according to the invention in the position of. rest,

Fig. 2 is a broken away part sectional side elevational of the auxiliary presser in an operative position in which all the frame needles, forming the heel portions, are pressed, 1. e. plain loops are formed,

Fig. 3 is a part sectional side elevation of the auxiliary presser, showing the individual parts in an operative position in which only the press instruments having a long head operate,

Fig. 4 shows in front elevation a portion of the auxiliary presser,

Fig. 5 is a detail view on an-enlarged scale of an auxiliary press instrument with a long head and a press instrument with a shorter head,

Figs. 6 and 7 show detail views on an enlarged scale of press instruments and frame needles in two different operative positions, and

Figs. 8-10 show diagrams of loops producedv during the manufacture of the beginning or starta ing courses.

In the jack sinker bearing i the usual jack sinkers .2 are arranged and the frame needles 4 may cooperate with the usual presser edge 3.

Upon a shaft 5 rotatably. journalled in the frame of the machine, not shown in the drawings, levers 6 are fixed which carry the presser frame I. The presser frame'l carries the presser combs 8 which in the range of the heel portions are provided with press instruments 25 and 26 having a long head 9 and a short head l respectively, asbest shown in Figs. 4 and 5."

Connected to the shaft is a lever- II the free end of which carries a displaceable roller l2. A tension spring 22 is connected with its ends to the lever I l and to a fixed point of the frame of the machine; The position of the-roller l2 may be adjusted by means of a fork ll mounted upon a rod is, shiftably arranged in the frame of the machine.

Upon a cam shaft l5, also mounted in the frame of the machine, a circular disc l6 and two cams l1, l8 are fixed into the path of which the roller [2 may beshifted.

'By means of a spring [9 the presser frame 1 is constantly drawn in a direction towards the jack sinker bearing I. The presser frame I carries projections '20 having an inclined surface 23. Fixed to the jack sinker hearing I are projections2i also having an inclined surface 24. The projections 20 and 2| are arranged in such a manner, that, when the presser frame are returned into the 1 occupies its position of rest, the inclined surfaces 29 and 24 of these projections are in contact with each other as shown in Fig. 1.

During the manufacture of ordinary or plain rows of loops, the press instruments 25, 26 oocupy the position shown in Fig. 1. The roller l2 carried by the lever I I, runs on the circular disc 16. The frame needles 4 are pressed directly at the presser edge 3, as in the case of any normal knitting machine for the manufacture of the leg portions of stockings.

During the manufacture of the heel portions at which time the needles forming the'instep portion of .the stocking are, in a well known manner, placed in suspense, the auxiliary presser combs, affecting the needles forming the loops of the heel portions, are brought into the position shown in Figs. 2 and 6. For this purpose the roller I2 is shifted into the path of the cam i1. In this position of the individual parts, the

head 9 of the press instruments 25 as well as the head In of the press instruments 26 lie in front of the presser edge 3, so that all the needles used for forming the loops of the heel portions are pressed by the heads 9 and it of the press instruments 25 and 26 respectively. Plain loops are formed in this manner. In the instep portion, pressing of the needles is not eflected, as the auxiliary pressers are provided in the range of the heel portions only and the bar, carrying the frame needles, or the heads of the frame needles are, during the formation of the heel portions, prevented from swinging into the rangeof the presser edge 3, but allowed to swing into the range of the heads 9 and III of the auxiliary press instruments 25 and 26 only.

After finishing the heel portions, the roller i2 is, for the purpose of manufacturing the starting or beginning rows of loops of-the enlarged sole portions, shifted into the path of the cam is. Hereby the auxiliary presser combs are brought into the position shown in Figs. 3 and 7 in which those frame needles 4 only 'are pressed which lie opposite the press instruments 25 provided with a long head 9. The frame needles 4, lying opposite the press instruments 26 having a short head III, are, however, not pressed.

As soon as the desired number of beginning or starting rows of loops, pressed in the manner described, has been formed, the auxiliary presser combs 8 carrying the press instruments 25, 26 position shown in Fig. 1 in which the heads 9 and III of the press instru-' ments 25, 26 lie below the To obtain this position i2 is shifted again into disc It. On further knitting, the frame needles 4 are pressed again by the presser edge 3 proper. The displacement of the roller l2 into the path of the parts, the roller presser edge 3 proper....-f

the path of the circular of the circular disc l6 and the cams I1 and II respectively may also be effected in any other suitable. manner.

Figures 8-10 diagrammatically'show the manufacture of-the loops of a starting or beginning I'OW. I

According to Fig. 8 it has been assumed, that the press instruments 25, 26 are shifted into the operative position shown in Figs. 3 and 7, so that only the instruments 25 provided with a long head 9 press their corresponding frame needles a, c, e. The loops hanging on these frame needles may, therefore, be knocked off. The frame needles b, d, I, situated opposite the press instruments 26 having a short head l are, however, not pressed, so that, as shown in Fig. 9, the loops remain on these needles with the result, that, as illustrated in Fig. 10, tuck loops are formed on these frame needles b, d, 1.

What I claim is:

1. An auxiliary presser for flat knitting machines, comprising a Jack sinker bearing, a presser edgeprovided at said jack sinker bearing, press instruments having a short head and press instruments having a long head alternating with each other, a frame carrying said alternately ar-' ranged press instruments, levers pivotally connected to the lower end of said frame, a rotatable shaft mounted in the frame of the machine and carrying said levers, a lever arm carrying a roller at its end and fixed upon said shaft, a circular disc and two cams of different height adapted to cooperate with said roller to rotate said shaft and bring said frame in its different positions of height, and projections, having cooperating inclined surfaces, provided at said frame and at, said jack sinker bearing of the knitting machine respectively, the arrangement being such, that the press instruments may occupy an inoperative position in which their heads lie below the presser edge of the knitting machine and two operative positions in which the press points of the instruments having a long head only and the press points of all the instruments respectively are situated in front of the corresponding frame needles, resulting in pressing alternating frame needles only and all of the frame needless respectively.

2. An auxiliary presser for flat knitting machine's comprising a Jack sinker bearing, a presser ge provided at said jack sinker bearing, press :fs'trumentswith headsof different lengths ar- 'rj'ariged in an alternate order of succession with regard to the length of the heads, a framecarrying'said press instruments, means for lifting said frame in different positions of height with regard to said presser edge, and means for swinging said frame simultaneously with its lifting.

'WOLDEMAR HEINITZ.

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