US2610495A - Fabric take-up device on straightbar knitting machines - Google Patents

Description

Sept. 16, 1952 DIEM 2,610,495

FABRIC TAKE-UP DEVICE ON STRAIGHT-BAR KNITTING MACHINES Filed Sept. 13, 1949 2 SHEETS SHEET l 25 21 11 24 r 9- g I i a I 25 INVENTOR. ms DIEM ATTORNEYS Sept. 16, 1952 H. DIEM 2,610,495

FABRIC TAKE-UP DEVICE ON STRAIGHT-BAR KNITTING MACHINES Filed Sept. 13, 1949 2 SHEETS-SHEET 2 INVENTOR.

H ANS Di E M BY Q- JP- m'mRNEYs Patented Sept. 16, 1952 FABRIGTAKEz-UP'DEVICE ons'rnAlcn'r- 1 ,i BAR KNITTING MACHINES Y Y Hans' Diem, Neuchatel, Switzerland, assignor'to NetiiihateL-Sfitsrhnd,

, Applicatiiin'Septembr 1a, 1949, ser alize-115,545 In Switzerland ctober9, 1948..

'1 Claims. (01; 66-152) My present invention relates to improvements in fabric take-up devices on straight-barknitting machines having automatically reciprocated draw-off hooks for themanufacture of hosiery of all kinds, i. e. also ofknitted were ready for use such as ware involving baggyenlargements.

In accordance with mypresent invention, the said hooks operate in reciprocalactionwith an automatically controlled clamping device which receives the hosiery andholds the same when the draw-off hooks move upwardly on idling strokes, but releases the hosiery whenthe said hooks move downwardly on their working strokes.

Such alternate operation of draw-off hooks and clamping device permits to attain, by comparatively simple means, a positive uniformly intermittent take-up or draw-off of the hosiery while carefully handling the loops, irrespective of whether the hosiery produced be of constant or varying width.

One form of my invention isillustrated in the accompanying drawing, in which- Fig. 1 shows the 'fabric take-up device on a pearl fiat-knitting machine, in a vertical crosssection on the line I-I of Fig. 3, the draw-off hooks being in the operative position.

Fig. 2 is a vertical cross-section on the line II-1I of Fig. 3, the clamping device being in the operative position, and

Fig. 3 is an elevation seen in direction of the arrow A in Fig. 1, the front needle bedtogether with the frame, however, being partly omitted.

designates the needle-bed frame of the knitting machine, 2 and 3 the front and the rear needle beds respectively, 4 the knitting needles, 5 the knitted ware, 6 and 6 two side walls provided on the frame I, the entire take-up device being mounted intermediate of the said side walls. Elongated slide elements 8 are vertically guided by means of two horizontal angle irons I and 1'. A draw-off member 9 each is pivoted to the head ends of the elements 8, and terminates on top in three hooks which are parallel to each other; The foot ends of the draw-off members 9 are biased by a compres- The numeral l sion spring l0 each, and each slide element 8' by a compression spring ll mounted thereon. The tension of each by means of a pin 12 which for such purpose may be plugged alternatively in any oneof a;

plurality of notches 13 of a "longitudinal slot provided on the elements 8.

spring I I may be adjusted Each said springs I0 is inserted in a horizontal bore provided in. the thickened head portion of the elements 8. I

22. The latter serve for (Societe Anonyme) A control bar It connected to the machine drive is associated with all the slide elements '8;

In theupp'er portion of saidframe l an angle iron' 15 is provided, to whicha horizontal stop strip it for the knitted ware, 5 is secured. The said stripat the same'time' constitutes the fixed part of the clamping device; A digitated strip 11 permits the'draw-off members '9 to pass there-= throughfor the purpose of guiding the same and, therefore, also theildraw-off hooks; The latter aredirectly guided by means of a horizontal abutment strip t8 of which: the head has the form of a comb; which stripconstitutes the movable part of the clampingdevice. The abutment strip"l'8 by virtue of its form and shape at the same time serves for guiding the, knittedware 5, and is rotatably mounted-on a shaft 28 by means of arms I9 of whichone only is. shown in Fig. 3. The said strip 18 is biased by tension springs 22 which are secured to holders 23 of whichone' only isfshown in Fig. 3. The holders 23 bear against the two angle irons l and I, bein adjustable'in position relative to the angle iron'l by'meansof a setscrew 2d each for the purpose cf-afdjusting the tension of the springs V holding the strip l8 against the thumb pieces 26 which are secured to the shaft 20. .A two-arm control lever 25 is pinned to the shaft 20, one arm of which is biased by a spring 2i, and to the other arm of which a link 21 is pivoted. The latter establishes the connection to the machine drive.

When the knitting machine is in operation, the control bar It is periodically moved up and down from themachine drive, and the shaft 28 is rocked to and fro through the link 27 and the control lever 25. The spring-loaded slide elements 8 follow the movements of the the draw-off members 9, which are carried by the elements 8, slide with their hooks over the j of therockable knitted ware 5 which, as shown in Fig. 2, is held in the clamping device is and la, the said hooks being laterally guided bet-ween the prongs or tines of the abutment strip i8 and the finger-sot the strip ll. By virtue of such guiding arrangement, the draw-off hooks move in exactly parallel relation to the looper rods of the clamped knitted ware 5 of. which the loops thus arecar'eiully handled. After theslide elements 8 have attained their upper terminal position, thehooks draw-off members 9, being biased by the springs 18, meshwith the loops of the ware 5. When the clamping device it? and it is tripped, the said hooks, sliding along the stop the arrow B (Fig. 2) in accordance with the return movement of the thumbs 26, thereby closing the clamping device and again gripping the ware 5.

The draw-off hooks and the clamping device thus are alternately operated at a rate set by the machine drive. The fabric 5 is taken up or drawn oiT always across its entire width, irrespective of Whether uniform or non-uniform amounts of fabric are produced.

Although the fabric take-up device represents a preferred embodiment of my present invention, it also, of course, may be constructed differently in its details. If desired, closed slots may be provided on the abutment strip [8, instead of interdental gaps or slots open at one end only,

for the purpose of guiding the draw-oi? hooks. The strip I1, which provides a second guide means for the draw-off members 9, could be formed similarly as the modified strip I8. Further, individual spring-loaded draw-off hooks could be provided in place of draw-off members provided with a plurality of draw-oi? hooks.

What I claim as new and desire to secure by Letters Patent is:

1. In a straight-bar knitting machine for the production of knitted material, a take-up device extending'over the workinglength of said machine comprising take-up hooks, automatic means for periodically moving said hooks up and down, a retaining device, automatic means controlling said retaining device and operating the same in synchronism with :said take-up hooks in order to retain the'material during the upward or no-load stroke of saidwtake-up hooks.

2. A construction as set forth in claim 1 wherein said retaining device comprises a fixed stop part and a movable retaining part having guide slots therein for receiving said take-up hooks.

3. A construction as set forth in claim 2 wherein guid means are provided forsaid takeup hooks to guide them laterally towards a second point of said movable retaining part.

4. A construction as set forth in claim 1 wherein said retaining device comprises a fixed stop part and a movable retaining part having guide slots therein for receiving said take-up hooks, said movable retaining part having a guide surface for the knitted material and adjustable springmeans acting upon said movable retaining part urging it inthe direction of action.

5. A construction as set forth in claim 1 wherein double spring stress means are provided acting upon said takep hooks, one of said means being operative in the lifting direction and the other in the engagement direction of the takeup hooks.

6. A construction as set forth in claim 5 wherein sliding elements are provided upon which said take-up hook are oscillatably mounted, spring means for urging said sliding elements in the lifting direction and automatic control means for said sliding elements. 7

7; A construction as set forth in claim 6 Wherein a plurality of take-up hooks are oscillatably mounted upon a single sliding element.

HANS DIEM.

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

UNITED STATES PATENTS Bromley Apr. 4, 1944

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