US2201557A

US2201557A - Plain knit ornamented fabric

Info

Publication number: US2201557A
Application number: US137903A
Authority: US
Inventors: James L Getaz
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-04-20
Filing date: 1937-04-20
Publication date: 1940-05-21
Anticipated expiration: 1957-05-21

Description

y 1, 1940. J. L. GETAZ PLAIN KNIT ORNAMENTED FABRIC Filed April 20, 1937 3 Sheets-Sheet 1 ATTORNEY gill! INVENTOR fi hhh u nu Unnu May 21, 1940. J GETAZ 2,201,557

PLAIN KNIT ORNAMENTED FABRIC Filed April 20, 1937 3 Sheets-Sheet 2 INVENTOR May 21, 1940. J. L, GETAZ' 2,201,557

PLAIN KNIT ORNAMENTED FABRIC Filed April 20, 1937 3 Sheets-Sheet 3 4 Patented May 21, 1940 UNITED STATES PLAIN KNIT ORNAMENTED FABRIC James L. Getaz, Mary'ville, Tenn.

Application April 20, 1937, Serial No. 137,903

3 Claims.

My invention consists in the novel features hereinafter described, reference being had to the accompanying drawings, which illustrate one embodiment of the same selected by me for purposes 5 of illustration, and the said invention is fully disclosed in the following description and claims. My present invention relates to an ornamented, plain knitted fabric, preferably a seamless plain knitted fabric, having an elastic thread incorporated under tension in certain spaced courses (or in all the courses) and secured to the fabric at separated wales in each course in which the elastic thread is present, without the necessity of using any additional thread, or threads, beyond the ordinary body thread or threads and the said elastic thread. In knitting unornamented portions of the fabric, the elastic thread is preferably fed under tension to the needles, in advance of the body thread, and is preferably interlaced between adjacent needles back and forth, passing in front of alternate needles in such manner as to take a position below the latches thereof, and in rear of the intervening needles, so that it is not received in the hooks of any of the needles and no loops of the elastic thread are formed, while the body thread is fed to and knit by all the needles. As the needles draw their loops of the body thread, those needles which have the elastic thread fed below the latches will cast the elastic thread off over the heads of the needles, while the needles in front of the elastic thread will draw their loops over the elastic thread and lock it in the wales formed by such needles, while the elastic thread extends in a substantially straight line in the fabric. The tension of the elastic thread draws the fabric laterally into vertically disposed parallel rib-like ridges and where, as preferred, it is locked in the fabric at alternate wales, those wales in which the elastic thread is locked in the manner described, will be forced to the inner face of the fabric, whilethe intervening wales will be forced to the outer face of the fabric, and all the wales will be held in close relation, thereby producing a smooth faced ridged fabric closely resembling rib fabric of the 1 xi type. Such fabric finds its principal use in the elastic tops ofhosiery, particularly for mens, womens and childrens sc'ks and anklets, and possesses not only the falls fitting characteristics of rib work, but in addition, a self-supporting characslightly indent the skin of the wearer, so as to support it against longitudinally slipping, without exerting. sufficient tension to be objectionable to the wearer and without being even perceptible in most cases.

I have found that such fabric can be ornamented in such manner by employing an elastic thread, which may be of rubber, but is preferably the well known Lastex, in which the rubber is surrounded by a coil or coils of inelastic strands, and 10 which is of different or contrasting color to that- 0f the body thread, and to feed the elastic thread into the hooks of selected needles, which are prevented from receiving the body thread, thus causing the selected needles in a course or courses 15 to draw loops of the elastic thread, while the body thread is floated in rear of such selected needles. Where the same needles in each of a number of successive courses, or all the courses of the elastic stocking top, draw loops of the elastic thread in this manner, each loop of elastic thread is drawn through a loop of elastic thread in the preceding course of elastic thread, thus producing a vertical stripe, or stripes, in the fabric, of contrasting color to the body of the fabric formed 25 of the body thread.

A suitable machine for carrying out my present invention is the well known Scott & Williams spiral circular knitting machine provided with selecting and pattern mechanism, such as is 11- 30 lustrated, for example, in United States Letters Patent to Ernest W. Marshall and Laurence B. Holt, No. 2,040,946, dated May 19, 1936, and I have illustrated such parts of such a machine as are necessary for an understanding of my inven tion.

Referring to the accompanying drawings:

Fig. 1 is a diagrammatic view illustrating an arrangement of needles and selecting mechanism therefor, operable in a known type of circular knitting machine for carrying my invention into effect.

Fig. la is a detailview of a portion of the selecting cam, illustrating a lateral cam grade thereof.

Fig. 2 is a vertical sectional view of a portion of the knitting cylinder, on the line Z-Z of 1, showing a needle with", its coacting needle jack and selecting jack.

Fig.3 is a similar view, on line 33 of'Fig; 1. Fig. 4 is a similar view to Fig. 2,on.1in'e 4-4 Fig.5 ls'a viewsimilar to Fig. 2,. on line 5-5 f Fig. 1. as

Fig. 6 is a view similar to Fig. 2, on line 6-6 of Fig. 1.

Fig. 7 is a view similar to Fig. 2, on the line I--'I of Fig. 1.

Fig. 8 is a diagrammatic representation of the inner face of the fabric as it is knitted, the fabric being in the distended condition.

Fig. 9 is a similar view of the face of the fabric, illustrated in Fig. 8, also in distended condition.

Fig. 10 is a detail perspective view showing portions of two courses of the knitted fabric, and looking at the inner face thereof.

Fig. 11 is a side view of a sock, in this instance an anklet, having a top formed of the ornamented fabric herein described.

In the drawings I represents the needle cylinder, which is provided with a circular series of needles. In this instance I have shown the machine arranged to interlace the elastic thread, indicated at e, in front of alternate needles and in rear of the intervening needles, and for convenience of reference I have indicated at 2, the alternate needles which receive the elastic thread on the front or outer side, the intervening needles being indicated at 2a, each needle being provided with the usual knitting butt 3 for engaging the usual knitting cams, shown at 4, 5 and'G. Below each needle is a needle jack I provided with a cam engaging butt 8 at its lower end, below which is a selecting jack having portions of its inner edge disposed angularly to other portions, so as to permit it to rock against the action of an encircling spring 25 engaging the selecting jacks adjacent to their upper ends. Again for convenience of reference, I have indicated the selecting jacks for the needles 2 by the numeral 9, and the selecting jacks for the needles 2a by the numeral 9a. Each of the selecting jacks 9, 9a is provided adjacent to its lower end with a plurality of selecting butts, indicated at Ila, IIb, No, etc., usually twenty-five in number, below which is an operating butt I2 for normally engaging a selector cam, indicated at I3, when the selecting jack is in the position in which it is normally held by the spring 25. This selector cam I3 is intended to elevate the alternate needles 2 which are to receive the elastic thread e on the front of the needles and eventually below the latch thereof. In order that only the selected needles 2which are in this instance alternate needles, shall be raised by the selecting cam I3 I provide means for knocking down the selecting jacks 9a for the intervening needles 2a, that is to say, the lower ends of the jacks 9a for the intervening needles 2a are forced inward so as to carry their butts I2 out of engagement with the calm I3, as shown in Fig. 2. Any suitable means may be employed for this purpose, and in this instance I have shown an auxiliary selector cam l6 (see Fig. 2) for engaging one of the butts II of the jacks for the needles 2a, the corresponding butts for the needles 2 being broken 05, so that the jacks for the needles 2 will not be knocked down. The cam I6 is capable of being drawn out of action when the elastic top is completed.

As a result of this selection, all of the needles 2 will be elevated by the selecting cam I3, in this instance to a height at or slightly above the clearing point, as indicated by the dotted line a, but high enough to receive the' elastic thread 3 upon the latches of the needles, as indicated in Figs. 1 and 3. The elastic thread e is preferably delivered to the needles 2 by a horizontally movable thread feed guide, indicated at 6, located in advance of the thread, which may be swung into and out of operative feeding position in any suitable manner, under the control of suitable pattern mechanism, so as to introduce the elastic thread into all the courses, or certain courses only, spaced from each other as may be desired, and as fully set forth in my former application for Letters Patent, Serial No. 53,824, filed December 10, 1935.

The butts l2 of the selector jacks of alternate needles 2, after being raised by the cam I3, pass along a horizontal grade, indicated at I 3a, and at this point the selecting jacks of certain selected needles are knocked down, which needles are those intended to draw a loop of the elastic thread only. They must obviously be certain needles of the group 2, as the needles 2a will be raised in front of the elastic thread, as hereinafter described. These particular or selected needles, I have indicated by the numeral 2x, and in this instance for purposes of description, I have shown every sixth needle of the series as being a selected needle, designed to produce a stripe formed of loops of the elastic thread, but it will be understood that any of the needles 2 may be so selected for the production of stripes at any desired intervals all the way around the tubular fabric, or at particular points therein, and at any desired intervals from each other, as may be found desirable.

For the purpose of selecting the needles 2x I find it convenient to employ the well known selecting mechanism of the Scott and Williams spiral machine referred to, comprising a horizontal series of selector cam levers, one of which is indicated at 20a in Fig. 3, usually twenty-five in number. These levers are selectively operated by a series of butts, somewhat similar to the butts IIa, etc., and arranged vertically on a trick wheel, which is moved intermittently in a rotary direction by suitable connections with the pattern mechanism. This mechanism is well known and specifically forms no part of my invention, and it therefore will not be further illustrated or described. It will be understood that one of the selector cam levers, as 20a, or reader cam levers as they are sometimes termed, will bemoved into position by the trick wheel, so as to engage one of the butts, as the butt Ila of the jacks for the selected needles 2:0, the butt 11a of the remaining needles 2 being broken ofi. The selecting jacks of the remaining needles 2 therefore remain in engagement with the horizontal portion I30. of the selecting cam I3, and will engage a secondary elevating grade I3b thereof, I

thereby raising all of the needles 2 except the selected needles 2:1: sufficiently to allow the latches to pass above the elastic thread e when they are at a level indicated by the dotted line z (Fig. 1). At this point, the operating butts I2 of the selecting jacks 9 for all the needles 2 engage a lateral cam face I30 (see Fig. 1a) which disengages the said operating butts from the cam I3 and permits the selecting jacks 9 for said needles, as well as for the selected needles 22:, to be returned to normal position by a cam I8 (see Fig. 1) which engages the butts 8 of the corresponding needle jacks I for the alternating needles 2, 2m.

In the meantime the selecting jacks So for the intermediate needles 2a have remained in their lowermost position, as indicated in Fig. 1. The needles 2a, however, have been raised to the shedding point, indicated by the dotted line 2, by means of a cam I1 and the upper surface of the cam 4, as clearly shown in Fig. 1. As the needles 2a are raised by the cam ll they will pass in front of the elastic thread e, thus eflecting an interlacement of the elastic thread in rear of the needles 2a and in front of the needles 2 and 233, as previously described. The upper end of each of the needle jacks 9a is provided with an auxiliary butt I4, and these auxiliary butts are engaged by a cam l5, which carries upward the selecting jacks 90. for the needles 2a and raises them from the shedding level, indicated by the dotted line a to the high level, indicated by the dotted line 2'.

All of the needles, therefore, with the exception only of the selected needles 2a: reach the higher level, indicated by the dotted line a where they receive the body thread I) from a suitable thread feed guide b in their hooks, and thereafter all of the needles are drawn downward by the engagement of their butts 3 with the knitting

cams

5 and 6 to form the knitting wave. The selected needles 2.1: however, do not receive the body thread, but on the contrary the lowering of the needles 21: causes their hooks to engage the elastic thread e so that all of the needles draw loops of the body thread except the selected needles 2:: which pass in front of the body thread, and draw loops of the elastic thread. This operation is repeated in succeeding courses in each of which the selected needles 2.1: will draw a loop of the elastic thread through a loop of the elastic thread in the preceding course, the body thread being floated behind the wales formed by the selected needles.

Fig. 10 illustrates the action of the different needles. Thus, as will be therein seen, each needle 2 which receives the elastic thread e below the latch, will draw a loop I; of the body thread, while the elastic thread e will-pass up over the latch and over'the head of the needle. Each needle 20. which is raised in front of the elastic thread, will draw a loop D2 of the body thread, over the elastic thread, thereby locking the elastic thread in the fabric by means of sinker wales at the wales formed by the needles 211. Each of the needles 2a: which receives the elastic thread upon the latch and is not thereafter elevated, is drawn down by the knitting cam to form a loop e2 of the elastic thread 6 while the body thread b is floated in rear of the wales formed by the selected needles 2x. A succession of loops e2 of the elastic thread, which is of contrasting color to that of the body thread b will thus form a vertical stripe in the fabric of the contrasting color, which I have indicated at S, as a whole. The floated portion of the body thread in rear of the loop c2 of the elastic thread is indicated at 173. These floated portions, it will be understood, will be in a substantially taut condition, as the fabric is knitted on the machine, in which the fabric will be considerably distended. When the fabric is removed from the machine, however, the tension of the elastic thread will contract the fabric laterally to form the vertical rib-like ridges. In the particular fabric shown, the tension of the elastic thread also forces the wales produced by the needles, 2 and 2x, to the outer face of the fabric, while the wales produced by needles 2a, are forced to the inner face of the fabric. This contraction of the fabric necessarily produces slack in the floats b3 of the body thread, so that when the fabric is distended in use, as in pulling the stocking or anklet top over the heel and upon the leg, these floats will not restrict the elasticity of the fabric.

It will be'understood that the elastic thread e is fed under considerable tension and maintained under said tension during the knitting of the fabric, by suitable tension mechanism, as, for example, that shown in my former application hereinabove referred to, the specific details of which, however, form no part of my present invention.

In Fig. 8 of the drawings I have illustrated, diagrammatically, the inner face of a portion of the fabric produced in accordance with the foregoing description, in which it will be noted that the loops in each course formed of the elastic thread, indicated at e2, form the stripes S While the intermediate loops D2 are formed of the body thread, which is floated, at 123, in rear of the elastic loops e2. It will also be seen that the loops b2 formed by the needles 2a lock the elastic thread into the fabric, as indicated at e3, in alternate wales, in this instance while the elastic thread passes in a substantially straight line between the loops e2 thereof, which form the stripes S.

Fig. 9 is a view similar to Fig. 8, and shows the exterior face of the fabric illustrated in Fig. 8.

It will be understood that the tension on the elastic thread e will be so regulated as to permit the formation of the loops e2 constituting portions of the stripes S and which therefore withdraw certain portions of the elastic thread out of the transverse line of the main portions thereof, that the tension of the remaining portions of the elastic thread in the several courses in which it occurs will be under the desired tension to produce the self-supporting feature of the fabric, and at the same time provide the necessary elasticity or stretch to enable the fabric in the case of a stocking top, to be drawn over the heel and upon the leg and accommodate itself to the size of the leg of the wearer.

It will beunderstood that, in accordance with my process previously described, the loops e2 of the contrasting elastic thread or Lastex, can be produced at any desired intervals in the fabric by varying the selecting mechanism so that the selected needles 2a: shall occur at the desired points in each course. Thus, the stripes S may be formed at opposite sides of the sock, or all the way around and located at equal distances apart or at varied distances apart, as may be found desirable.

In Fig. 11 I have shown an anklet A provided with an elastic top T constructed in accordance with my improved process and comprising my improved ornamented fabric hereinbefore described, In this figure the vertical rib-like ridges are indicated by parallel vertical lines, and the stripes formed by the loops of elastic thread of a color contrasting with the body thread are indicated at S. The upper edge of the top T is preferably provided with an anti-ravel edge, or selvage, or a suita'ble welt, indicated at t, and formed in the usual or desired manner. It will be understood that the leg portion a of the stocking, if knit of plain knitting, may be knit continuously onto the last course of the top T or'the top may be formed separately and united to the leg portion of the anklet or stocking, in any usual or desired manner.

When the leg of the stocking is to be knit integrally with the elastic incorporated top previously described, I, prefer to discontinue the operation of the trick wheel for one or more courses at the lower end of the top, so that all of the needles, including the selected needles 2a: will be raised to the level indicated by the line z and will take the body thread. This insures that there shall be a loop of the body thread on every needle of the last course of the top. The feeding of the elastic thread is then discontinued, preferably by throwing out of operative position the thread guide e and clamping the elastic thread in a suitable clamp or binder, which may be provided with a cutter,in the usual manner, if desired, or the elastic thread may be allowed to break, as the knitting of the leg progresses. The machine will then produce plain knitting without the incorporation of the elastic thread and the stocking will be completed in the usual manner.

The process for the production of my improved fabric is not claimed herein, as the same forms the subject matter of my application for Letters Patent of the United States filed April 26, 1938, and given Serial No. 204,30 l, which is a division of this application, said application Ser. No. 204,- 301 having issued January 30, 1940, as Patent No. 2,188,295.

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

1. The herein described plain knitted ornamented elastic fabric comprising a plurality of courses of plain stitches formed by a body thread, each of said courses having incorporated therein an elastic thread, under tension, of contrasting color, locked into the fabric at separated points .in said courses, said elastic thread forming at certain corresponding points in each course, a loop replacing a loop of the body thread, which is floated behind said elastic loops, the loops of elastic thread in successive courses being drawn through the loops of elastic thread in the preceding courses, and forming stripes, the tension of said elastic thread contracting the fabric laterally and forming vertically disposed rib-like ridges.

2. The herein described plain knitted ornamented elastic fabric comprising a plurality of courses of plain stitches formed by a body thread, each of said courses having incorporated therein an elastic thread under tension, floatedin rear of alternate wales and locked into the fabric at the intervening wales, and forming loops at certain of said alternate wales, displacing the corre sponding loops of the body thread, which is floated in rear of said elastic thread loops, the elastic thread loops of successive courses being drawn through the elastic thread loops of the preceding course and forming vertically disposed stripes, the tension of said elastic thread contracting the fabric laterally and forcing said outer wales, including those formed by said elastic loops, to the outer face of the fabric and said in tervening wales to the inner face of the fabric, and producing slack in the floated portions of the body thread. a

3. The herein described plain knitted ornamented elastic fabric comprising a plurality of courses of plain stitches formed by a body thread, certain of said courses having incorporated therein an elastic thread, under tension, of contrasting color, locked in the fabric at separated points in said courses by the sinker wales, forming floats on the inner face of the fabric between said separated points, and forming loops at certain points in said courses, replacing the body thread which is floated on the inner face of the fabric in rear of said loops of the elastic thread.

JAMES L. GETAZ.