US2060462A - Run resisting knitted fabric - Google Patents

Description

Nov. 10, 1936.

H. FLEISHER RUN RE I ITING KNITTED FABRIC 'Filed Feb. 19, 1956 2 Sheets-Sheet 1 INVENTQR Harry Flezsher- BY ATTORNEY Nov, 10, 1936. H FLE|5HER 2,060,462

RUN RE SISTING KNITTED FABRIC Fil ked Feb. 19, 1936 2 Sheets-She'e'tf INVENTOR Harry Fleisher BY Patented New. EG, 1936 STATE.

ZJDGQQGE RUN RESESTING KNITTED FABRIC tion of Connecticut Application February 19,1936, Seriall No. cases ll @laim.

This invention relates to plain knitted fabrics, and more particularly to a run-resisting knitted fabric made upon a circular knitting machine employing independent spring beard needles.

One object of this invention is to provide a knitted fabric of the above nature comprising a plurality of repeating patterns, each consisting of three yarns, the first of which is knitted at each wale, the second and third yarns being floated over odd and even wales, respectively, the floats of said second and third yarns being held tightly in juxta-position in such a manner as to form run-resisting barriers or ribs in the fabric.

A further object is to provide a knitted fabric of the above nature having a ribbed surface on one side thereof forming an improved and high- 1y attractive appearance, and closely resembling fabrics made on a fiat goods machine.

A further object is to provide a knitted fabric of the above nature which will be simple and easy to manufacture, flexible and elastic, noncrushable, having a smooth feel, and very efficient and durable in use.

With these and other objects in view, there has been illustrated on the accompanying drawings one, form in which the invention may be conveniently embodied in practice.

In the drawings:

Fig. 1 represents a diagrammatic plan view of a circular knitting machine for producing the improved fabric.

Fig. 2 is an enlarged view of the front surface of a section of the knitted fabric.

Fig. 3 is a similar enlarged view of the reverse side of the fabric.

Fig. 4 is a development view of a portion of the needle-actuating cylinder cam.

Fig. 5 is a vertical sectional view on an enlarged scaleof another portion of the circular knitting machine.

Fig. 6 is a sectional view of a portion of the needle-actuating cam, taken along the line 6-6 of Fig. 4.

Fig. '7 is a similar sectional view taken along the line 'll of Fig. 4.

One serious objection tothe use of plain knitted fabric, especially in garments made from slippery yarns, such as rayon, is the tendency for the occurrence of runs, which injure the appearance and usefulness of the goods. Attempts have been made to prevent the occurrence of runs by the introduction of additional interlocking yarns, but this has tended to increase the weight of the fabric, which is often not desirable. 1

By means of the present invention, the above and other disadvantages have been overcome, and a. run-resistant knitted fabric has been devised which will be light in weight and can be '.made on an ordinary plain knitting machine.

Referring now to the drawings in which like reference numerals denote corresponding parts throughout the several views, the numeral iii indicates a circular stationary base or tableupon which are mounted a plurality of brackets it for supporting a stationary ring member it,

which carries a plurality of arcuate plates l9 forming a segmental circular sinker-operating cam member.

Provision is also made of a rotating needle carrying cylinder 64 and a stationary annular needle-actuating cam cylinder is is rigidly mounted on the table It below said stationary ring member 62. The rotary needle cylinder It carries a plurality of needles it and H which are adapted to cooperate with the stationary needle cam cylinder IE to cause said needles to travel upwardly and downwardly during the operation of the machine. The needles are of two types-the needles l6 having long butts, while the needles I? are provided with short butts. The long and short butt needles l6 and H are arranged'alternately around the circumference of the needle cylinder It. Each of the needles It and H is provided at its upper end with the usual spring beard it which is adapted to catch the yarn or thread to form loops in carrying out the knitting action. Operating between the successive needles are the usual sinkers is, which have projections 20 formed on the upper edges thereof, which projections are engaged within horizontal cam-grooves 2| formed in the segmental plates IS. The cam grooves 2i serve to control the outward and inward movement of the sinkers l9 at the proper times. Provision is also made of a series ,of pressers 22 for closing the needle beards I8 when engaged by the beard closing cams 25 located at the knitting points. At other times, in order to hold the pressers 22 away from the needles l6 and ii, provision is made of a circular coiled spring 23 surrounding the lower notched ends of said beard closers.

In order to line up the pressers 22 just in advance of the knitting points, provision is made of a plurality of cams 24, which serve to guide said pressers. into such'a position that they will close the beards it as the needles l6 and I! move downwardly: At each knitting point, provision is made of a T-shaped cam 25 for pushir the pressers 22 against the beards l8 so that the latter will be closed as the needles move downwardly in making the loops or stitches.

For producing the improved fabric, the machine is provided with twelve knitting threads numbered 26, 21, 28, 29, 30, 3|, 32, 33, 34, 35, 3'5, 31, respectively, said threads being fed into the machine through guides 38 and 38a.

A set of needle cams 39, 40, 4| on the cylinder I5 is provided to control the up and down motion of the alternating long butt and short butt needles l6 and I1. Three difierent arrangements are employed in succession, as indicated by the dotted lines 42 representing the movements of the short butt needles l1, and the dot-and-dash line 43 representing the movements of the long butt needles l6 (see Fig. 4)

At the first feed A, all the needles will knit I at each Wale, producing a continuous row of stitches in the first yarn.

At the second feed B, the long butt needles IE will knit relatively tight run-preventing loops, and the short butt needles ll will not knit, the yarn being knitted at odd numbered wales and floated at even numbered wales.

At the third feed C, the arrangement is the reverse of that at the second feed; in other words, the short butt needles ll will knit relatively tight loops at even numbered wales, and the long butt needles I6 will not knit so that the yarn is floated at the odd numbered wales.

The above described sequence will then be repeated on each succeeding set of three feeds or yarns throughout the needle cylinder.

It will be noted by reference to Figs. 2 and 3 that the floats produced on the feeds B and C lie close together in the fabric, producing a series of tightly formed ribs on one surface, as shown in Fig. 3, while the opposite surface shown in Fig. 2 is relatively smooth and uniform in appearance. The tightly formed ribs are of importance as they probably contribute to the run-resisting properties of the fabric.

While there has been disclosed in this specification one form in which the invention may be embodied, it is to be understood that this form is shown for the purpose of illustration only, and that the invention is not to be limited to the specific disclosure but may be modified and embodied in various other forms without departing from its spirit. In short, the invention includes all the modifications and embodiments coming within the scope of the following claim.

Having thus fully described the invention, what is claimed as new and for which it is desired to secure Letters Patent, is:

A run-resisting smooth knitted fabric consisting of repeating series of courses knitted from three yarns, each series consisting of a first yarn knitted with uniform stitches at every Wale of a course, a second yarn knitted with relatively tight run-preventing loops at odd numbered wales and floated over even numbered wales in an adjacent course, and a third yarn knitted with relatively tight stitches at even numbered wales and floated over odd numbered wales in the next adjacent course.

HARRY FLEISHZER.

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