US3058326A

US3058326A - Multiple pile projections

Info

Publication number: US3058326A
Application number: US796364A
Authority: US
Inventors: Jr Rex S Maccaffray
Original assignee: CH Masland and Sons
Current assignee: CH Masland and Sons
Priority date: 1959-03-02
Filing date: 1959-03-02
Publication date: 1962-10-16
Anticipated expiration: 1979-10-16

Description

Oct. 16, 1962 R. s. MaccAFFRAY, .JR 3,058,326

MULTIPLE PILE PROJECTINS Filed March 2, 1959 16 Sheets-Sheet l Qffolu Oct. 16, 1962 R, s, MaccAFFRAY, JR 3,058,326

MULTIPLE: PILE PROJECTIONS Filed March 2, 1959 16 Sheets-Sheet 2 Z5 z 7 5f 55g f/ ff; f O J a o* I 32 j] 4 521 %0 fa if INVENTOR Oct. 16, 1962 R. s. MaccAFFRAY, JR 3,058,326

MULTIPLE PILE PROJECTIONS Filed March 2, 1959 16 Sheets-Sheet 3 vw? N` m M "si s J INVENTOR Oct. 16, 1962 R. s. MaccAFFRAY, .JR

16 Sheets-Sheet 4 INVENTOR eleg.. l Qi ATTORNEYS Oct. 16, 1962 R. s. MaocAFFRAY, JR 3,058,326

' MULTIPLE Pm; PRoJEcTroNs Filed March 2, 1959 16 Sheets-Sheet 5 INVENTOR Key J". /t//acCaffra/y, J7'.

Oct. 16, 1962 R. s. MaccAFFRAY, JR 3,058,326

MULTIPLE PILE PROJECTIONS Filed March 2, 1959 16 Sheets-Sheet 6 INVENTOR Oct. 16, 1962 R. s. MaocAFFRAY, JR 3,058,326

MULTIPLE PILE PROJECTIONS 16 Sheets-Sheet '7 Filed March 2, 1959 INVENTOR Re; J? MacC'a//rayl Jr. NSM. Y .Q4

ATTORNEYS.

Oct. 16, 1962 R. S. MaCCAFFRAY, JR

MULTIPLE PILE PRoJEcTroNs Filed March 2, 1959 7 1e sheets-sheet a d 5g' 36 C l C) ff f7 ff A L ya, l

4 'l i j 5/ ff Oct. 16, 1962 R. S. MaCCAFFRAY, JR

MULTIPLE PILE PROJECTIONS Filed March 2. 1959 16 Sheets-Sheet 9 egim. l. 9&4

Oct. 16, 1962 R. s. MaccAFFRAY, JR

MULTIPLE PILE PROJECTIONS Filed March 2, 1959 16 Sheets-Shea?l lO e fa.

Oct. 16, 1962 R. s. MaocAFFRAY, JR 3,058,326

MULTIPLE PILE PROJECTIONS Filed March 2. 1959 16 Sheets-Sheet 11 ATTORN EYS Oct. 16, 1962 R. s. MaocAFFRAY, .1R 3,058,326

MULTIPLE PILE PROJECTIONSv Filed March 2, 1959 16 Sheets-Sheet l2 OC- 16, 1962 R. s. MaccAFFRAY, JR 3,058,326

MULTIPLE PILE PROJECTIONS Filed March 2, 1959 16 Sheets-Sheet 13 f6 2 0 o o Q G C) Oct- 16, 1962 R. s. MaccAFFRAY, JR 3,058,326

MULTIPLE PILE PROJECTIONS Filed March 2, 1959 16 Sheets-Sheet 14 G n @J 33;/ 0 Zifg'j w .52320. I. fw Y 32501@ 5f 33. i? fg Oct. 16, 1962 R. s. MaccAFFRAY, JR 3,058,326

MULTIPLE PILE PROJECTIONS Filed March 2. 1959 16 Sheets-Sheet 15 Oct. 16, 1962 R. s. MaccAFFRAY, JR 3,058,326

MULTIPLE PILE PRoJEcToNs 16 Sheets-Sheet 16 Filed March 2, 1959 vw wm m TM n. DNn m@ ,fo v6 T Nc n. T l@ MAA M l@ Ynv United States The present invention relates to warp knitted pile fabrics.

rl-his application has been divided, and the subject matter of the method has been embodied in United States patent application Serial No. 9,460, filed February l8, 1960, for Method of Warp Knitting Pile Fabric With Multiple Pile Projections, now United States Patent No. 2,989,858.

A purpose of the invention is to increase the density of pile without corresponding increase in the backing stitch density.

A further purpose is to improve the utilization of pile yarn in a warp knitted pile fabric.

A further purpose is to increase the yardage production without increasing the speed by forming twice the number of pile projections per course as in the prior art, thus allowing the stitch length to be increased to such an extent that for a given pile density the production will be doubled.

A further purpose is to produce a more wear resistant warp knitted pile fabric.

A further purpose is to increase the yarn utilization in moresque type warp knitted pile fabrics.

A further purpose is to form straight `warp lines of knitting chains, to lay in backing yarn alternating weftwise in the loops of the chain stitches, to form pile loops with legs of the pile loops bound in the stitches of the chains, each pile loop being formed `so that it will be split by a knitting chain into two complete loops, both of which loops having -a binding point in one stitch, but the opposite legs of the loops having binding points in diiferent chains.

A further purpose is to form two pile loops or other pile projections from the same pile yarn ends in warp knitting in the same course with the same orientation.

A further purpose is to produce two pile projections formed on the same course from the same pile yarn end in warp knitting, one of the pile projections being oriented weftwise and the other pile projection being oriented diagonally with respect to the weft.

A further purpose is to produce on each course a loop or pile projection both of whose legs are bound in the same stitch of the same chain of stitches, and also a loop of pile projections one leg of which is bound in that stitch and that chain and the other leg of which is bound in the next stitch.

A further purpose is to form high and low pile loops or other pile projections in broken or staggered rows rather than continuous rows in the face of -a carpet or rug so as to diversify the texturing.

A further purpose is to produce two pile loops or other pile projections on the same pile yarn end in the same course of a warp knitted pile fabric, one of which loops is oriented weftwise and the other of which is oriented walewise.

Further purposes appear in the specification and in the claims.

In the drawings, I have chosen to illustrate a few only of the numerous embodiments in which the invention may appear, selecting the forms shown from the standpoints of convenience in illustration, satisfactory operation and clear demonstration of the principles involved.

FIGURES l to 8 are diagrammatic fragmentary en- 'ine larged top plan views showing the steps of formation of 'a fabric of the invention according to FIGURE 9.

FIGURES la to 8a are diagrammatic fragmentary enlarged top plan views showing the steps of formation of a fabric of the invention according to FIGURE l0.

FIGURES lb to 8b are diagrammatic fragmentary enlarged top plan views showing the steps of formation of the lst, 3d, 5th, etc. stitch only of the fabric of FIG- URE ll (in other words the odd numbered stitches).

FIGURES 1c to 8c are diagrammatic fragmentary enlarged top plan views of the steps of formation of the 2d, 4th, 6th, etc. stitches only of the fabric of FIGURE ll (in other words the even numbered stitches).

The FIGURES ld to 8d are diagrammatic fragmentary enlarged top plan views showing the formation of a fabric having pile loops or other pile projections which are all bound in the `same chain, but with double loop formation of the present invention as shown in FIGURE l3.

FIGURE 9 is a fragmentary top plan view of the fabric produced in accordance with FIGURES l to 8, illustrating the knitting chains and the face yarn only, with the backing yarn shown below separately for the sake of clarity. This view has been expanded in order to permit showing the double adjoining face loops formed from the same face yarn around -adjacent plush points and across three lines of chain in the same course. The center legs of the two pile loops are bound under a common center chain, and the opposite legs of each loop are bound in the two adjacent chains to the right and left of the center chain `and in the same course.

FIGURE l0 is an expanded top plan view of the face of a fabric ofl FIGURES la to Sa, with the backing yarn removed for the sake of clarity, the backing yarn suitably being of the form of FIGURE 9'. One binding point is common to both loops but the first leg of the rst yloop is bound in the stitch of the previous course of the same chain that forms a common binding point, while the second leg of the second loop is bound in the stitch of the adjoining chain in the same course as the common binding point.

FIGURE ll is an expanded top plan view of the fabric of FIGURES lb to 8b and 1c to 8c with the backing removed for the sake of clarity. The backing is suitably the same las in FIGURE 9. The pile loops are formed around two adjacent plush points. The pile loops have a common center binding point lwith the outside leg of the rst loop bound in the previous stitch of an adjacent chain, while the second `loop has the outside leg bound in the same course of another adjacent chain.

FIGURE 12 is in an expanded top plan view with the backing yarn removed to better display the loop formation. The backing will suitably be as in FIGURE 9. The loops are formed in pairs around adjacent plush points and the sequence is a combination of the steps used to produce the fabrics of FIGURES l0 and 1l.

FIGURE 13 is an expanded top plan view with backing removed, showing a fabric with double loops formed around adjacent plush points. Ihe backing will suitably be as in FIGURE 9. The first leg of the first loop is bound in the previous stitch, and the second leg of the rst loop and both legs of the second loop are bound in the next stitch of the same chain.

FIGURE 14 is a photographic view of the face of a fabric sample which conforms to FIGURES 1 to 8 and 9.

Describing in illustration but not in limitation and referring to the drawings:

In warp knitting loop pile fabrics for use as carpets, rugs, upholstery and other heavy fabrics of that type, the practice in the prior art has been to knit lines of chain stitches, form the back of the carpet by alternating heavy layin yarn Weftwise which is secured in the loops of the chain stitches, and forming a projecting loop of face yarn from each end of face yarn in each course, with the legs of the pile loop fastened in the chain stitches. Y

When very compact long wearing pile was required in the prior art, it was formed by shortening each stitch and increasing the number of stitches and courses per inch, or by the use of a liner gauge trick plate, or both, for the purpose of increasing the number of pile projections per square inch.

When the number of courses per inch is increased, this decreases the yardage produced in a given time, because the course or takeup is laid down.

On the other hand, if a liner gaugeis used, this limits the size of the face yarn. The machine parts are more fragile. In addition the use of fine gauge parts increases the cost of setup and operation due to the increase in the number of parts for a given width and the more precise adjustments required on the knitting machine when ine gauge parts are used.

I have discovered that I can produce fabrics with a more compact and closer spaced pile face without enploying close stitches and iine gauge, by forming two pile loops from each end of pile yarn in each stitch and Wale.

This is accomplished by looping the pile y'arn around two plush points at the same time instead of around one plush point as in the prior art. This forms one wide loop which in every case extends around two plush points and extends across an intermediate line of knitting chain. When the knitting stitch is formed, the intermediate end of knitting yarn must pass between the plush points which have been bridged by the wide loop. This splits or subdivides the loop into two adjoining loops with a common center binding point lformed by the intermediate line of knitting chain.

When a cut pile is formed, cutting plush points may be used in the same way las noncutting except that the pile loops are not cast od but instead are cut, producing four cut pile projections in each course from each running end of pile yarn.

The results which have been described above are accomplished by one pile yarn guide bar or frame, and, of course, they can be multiplied by using two or more frames.

One of the great advantages of the present invention is that there is no layin of pile yarn which does not produce a pile projection, and therefore, each stretch of pile which in the prior art produced a single loop, in the present case produces two loops or other pile projections. Accordingly pile utilization is greatly improved.

The principles of the invention can be applied to produce an extremely compact pile with a normal openness of stitch, thus greatly improving the wear resistance, or it can be applied to fabric having a veryl open stitch which still employs a pile of normal compactness.

AIn some cases, it is desirable to apply the principles of the invention to warp knitted pile fabrics having the moresque effect, using pile yarn ends of different colors in different tubes of the same pile yarn guide bar. In the prior art, there 'has been di'i'culty in warp knitting moresque pile carpets and rugs because of :the introduction of lining elects through variation in yarn of particular colors in different parts of a carpet of large area as in a lobby of a hotel or theatre, or, in fact in any broadloom. By the present invention, however, the loops formed from a single pile yarn end iare distributed laterally in broader weftwise bands, and therefore the likelihood that lines will be visible is correspondingly decreased. While this principle is believed to find its widest use in moresque carpets, it is also useful in plain colored face yarn 'applied on Aa particular frame which may be the only lframe used or one of several.

The invention is also applicable to carpets or rugs having high and low pile projections in the face. In prior experiments with carpets having high and low loops, I have found that there are diiculties through the tendency to limit the variation obtainable because of long narrow rows of pile produced from the same pile end. By the present invention, it is possible to distribute the pile projections from the same pile yarn end in broader bands weftwise, breaking up the rows and adding greatly to the interest in fabrics having high and low pile.

The present invention produces two adjoining pile projections from the same pile end and in the same course, and these two pile projections can be oriented in different ways, in some cases both extending weftwise, and in some vcases one extending weftwise and one diagonally of the weft, and in still other cases both pile projections extending walewise.

In some cases, in accordance with the present invention, three orientations of pile projections can be employed in the same fabric. Thus, in the same fabric on the same pile end, there can be pile projections which extend weftwise, those which extend walewise and those which extend diagonally with respect to the weft and to the Wale, in any desired sequence of arrangement.

In one embodiment of the invention, the pile yarn ends are bound in a single row of stitches, and on each course one pile projection is formed, both of whose legs are bound in the same stitch, and another pile projection is formed with one leg bound in the same stitch and another leg bound in the next stitch.

The nature o-f the invention can best be understood by lrst considering FIGURE 9, with further reference to FIGURES l0, ll, 12 and 13, which represent expanded diagrammatic plan views of the faces of the fabrics of the invention.

These `fabrics may be made in a standard Raschel warp knitting machine, as well known in the art, of the character described for example in D. F. Paling, Warp Knitting Technology (1952), particularly pages 132 to 192 inclusive. In this machine the knitting latch needles manipulated by a needle bar cam are operated to raise and fall within a trick plate which guides the needles. On the opposite side of the trick plate from the needle bar there is a second needle bar but in this case it is furnished with a gang of plush points instead of needles, and a suitable cam which causes the plush points to rise and fall. Above the needles and plush points there are swinging guide bar carriers for the pile yarn, backing yarn and knitting yarn, with a standard swinging motion for all bars, and an individual shogging motion for each bar separately, these motions cooperating with a letot for yarn and a pickup for fabric as well known in the prior art.

Considering now FIGURE 9, the fabric consists of a series of warpwise knitting chains 30 formed of knitting yarn 3-1 fed through tubes 32 on the knitting yarn guide bar. The chains 30 have knitting stitches 33 including loops which bind together bundles 34 of backing yarn 35 fed by tubes 36 of a backing yarn guide bar. The backing yarn follows a serpentine course over a required number of needles, in this case shogging over three lines of chain stitches, but suitably shogging over more than three lines of chain stitches as desired. The face o-f the fabric is composed of

pile yarn loops

37 and 38 in each course and Wale, formed from pile yarn ends 40 and 40 fed from adjoining pile yarn tubes 411 of the same pile yarn guide bar, but are indicated by different stippling to indicate that they are suitably of different color or of the same color as desired. The backing yarn is shown only in the lower section of the view for clarity.

It will be noted in FIGURE 9 that the knitted chains are alternately of left hand and right hand stitches, although the question of whether the stitches alternate or are always the same is not critical in the present invention.

The pile yarn ends in FIGURE '9 have shogged over three needles and

form loops

37 and 38 extending weftwise. While the pile projections are shown as uncut pile loops, it will be evident that they can be formed as cut pile tufts following the principles of my copending patent application Serial No. 666,312, tiled June 18, 1957, for Warp Knitting Machine Using Cutting Plush Point, now United States Patent No. 2,907,101.

Each pile yarn end forms two pile projections on each course in FIGURE 9. One of the pile projections is offset one Wale from the other pile projection.

Thus in the same wale and course there is yone pile projection 37 and one pile projection 3S. In an ordinary warp knitted pile fabric, there would be only one pile projection in the same Wale and course, but FIGURE 9 has two such pile projections.

The double loop formation just described can be utilized in different ways as previously explained. It can be used to produce extremely dense and wearresistant pile, or it can be used to increase the rate of production of a pile having more open stitches. Unlike prior art fabrics which in some cases shog across needles without forming pile, in the present invention pile projections are formed on each shog across a needle, and therefore there is high eiciency of the utilization of pile yarn.

It is of course evident that each of the pile yarn ends forms pile projection laterally in adjoining Wales, and this tends to increase the width of the pile `formed by particular pile yarn ends and in addition supplements each loop by an adjoining loop formed on the same course for mutual supporting purposes. This gives a fabric which is less likely to show lining effects, particularly where moresque pile yarn -is used, and it also breaks up rows where high and low pile projections are used.

In the form of FIGURE 9 the pile projections formed from the same pile yarn end in the same course are all oriented in the saine way, that is, all weftwise or coursewise. It will be evident as later explained, however, that the pile projections formed in the same course from the same pile end can be differently oriented if desired.

The steps in constructing the fabric of lFIGURE 9 are shown in FIGURES l to 8 inclusive, which are diagrammatic expanded plan views of the main operating parts of a Raschel warp knitting machine and of the fabric being for-med thereon according to the invention. In addition to the parts already described, there are shown in each View latch needles 42 and plush points 43 respectively on opposite sides of the fabric.

It will be evident that in FIGURE l the bundles 34 of backing yarn 35 are all bound by the previous stitch 33 which is on the needles 42. At the beginning of the cycle, as in FIGURE 1, the loops of the previous course are shown at 44 and 45. The needles and plush points are down, and the yarn guide tubes are moving back toward the needle side as shown.

In FIGURE 2 at 30 degrees in the cycle, the plush points 43 have just risen and the

yarn guide tubes

32, 41 and 36 have moved all the `way back on the needle side. The backing yarn guide tubes 36 are shogged three needles to the right to form the layin of the backing yarn 35.

In FIGURE 3 at 90 degrees in the cycle, the

yarn guide tubes

32, 4l and 36 have moved to the front of the plush points. The pile yarn guide tubes V4I have moved to the right past two plush points 43, forming stretches 46 of

pile yarn

40 and 46 which will become the pile loops of the new course of stitches.

In FIGURE 4 at 150 degrees in the cycle, the yarn guide bars 32, 41 and 36 have moved all the way back to the needle side as shown.

The pile yarn guide bar tubes 4I shog one needle space to the right to be in position to form the second outside leg of the

loops

37 and 38 being formed on the plush points `43.

In FIGURE 5 at 210 degrees in the cycle, the

yarn guide tubes

32, 41 and 36 have moved to the front in position to allow the needles to rise, and the needles have risen. I oops of the last knitting stitch 33 slide down the needles, opening their latches, and the now opened hooks of the needles are ready to form the new knitting stitch.

In FIGURE 6 at 270 degrees in the cycle, the

yarn guide tubes

32, 41 and 36 have moved back past the needles 42, and knitting yarn guide tubes 32 have shogged to the right one needle space so that the knitting yarn 31 is in position to form loops 33 around the hook sides of the needles. The

loops

37 and 38 of pile yarn for the new course are now fully formed and ready to be bound in by the new knitting stitches.

In FIGURE 7 at 300 degrees in the cycle, the yarn guide tubes are moving to the front, and needles 42 and plush points 43 are retracted to their lower position. Between the position of FIGURE 7 and the position of FIGURE 8 the new loops of knitting yarn 33 are pulled down by the hook of the needle and the old stitch loops 332 are raised over the closing latches of the needles and the needle hook with its new loop to complete the stitches as shown in FIGURE 8 at 330 degrees in the cycle. In FIGURE 8 the plush points have just released the

new pile loops

37 and 38 and the course is complete.

As already described, the construction of FIGURE 9 Orients all of the loops in the same way, but in FIGURE 10 ioops are oriented differently. In FIGURE 10 the lines of stitches unite the bundles of `backing yarn (like FIGURE 9, but not shown) and also unite pile yarn ends 4@ and 40', which form loops 47 and 47 from pile yarn ends 40 and loops 4S and 4S from pile yarn ends 40', both of the

loops

47 and 47 or 48 and 48 being formed from the same end in the same course.

Thus it will be seen that in FIGURE 10, a weftwise and a walewise loop is formed from each pile yarn end in the same course.

FIGURES la to 8a illustrate the method of knitting the fabric of FIGURE 10. FIGURE la shows the position at zero degrees in the cycle, the previous loops 47 and 47 and 43 and 48' being completed. The needles 42 and plush points 43 are down. The

yarn guide tubes

32, 4I and 36 with the yarn on them are moved back toward the needle side.

FIGURE 2a at 30 degrees of the cycle shows the

yarn guide tubes

32, 41 and 36 moved all the way back to the needle side. In this position the piush points are rislng. Pile yarn guide tubes 41 are shogged one needle to the left, forming stretches S0 preparatory to forming these into loops Vin FIGURE 3a. Backing yarn tubes 36 are shogging to the right to form laid-in stretches of backing yarn 35 for the new stitch.

In FIGURE 3a the guide bars 32, 41 and 36 have moved all the way to the front and guide bar tubes 4I have shogged two needles to the right past two plush points 43 to form stretches of yarn 46', each of which will eventually form two loops of pile yarn.

.In FIGURE 4a at 150 degrees in the cycle, yarn

guide bar tubes

32, 4I and 36 have moved back to the needle side and the stretches of pile yarn 46 shown in FIGURE 3a have formed the new loops 47, 47 and 48, 48'. `'Ihese loops are separated by the knitting yarn 31. The p1le yarn guide bar in FIGURE 4a also shogs the p1le yarn one needle to the right in order to form the second legs of the loop as illustrated at S1.

In FIGURE 5a at 210 degrees in the cycle, the

guide bar tubes

32, 4l and 36 are shown moved to the front or plush point side. No shogging is taking place and all yarn has been placed in position except the knitting yarn, and the needles are now rising. The pile yarn which will form the double loops is around the plush points. As the needles rise the loops of the previous knitted stitches will move down on the hooks of the needles, opening the latches and placing the open hooks of the needles in position to accept the knitting yarn.

In FIGURE 6a at 270 degrees in the cycle, the

guide bar tubes

32, 4I and 36 have moved back past the needles to the needle side. Knitting yarn guide bar tubes 32 now 7 shog one needle to the right to form loops 33 of knitting yarn which will enter the hooks of the needles 42.

In FIGURE 7a at 30() degrees in the cycle, the course is fully formed but not yet locked in place. The needles 42 are dropping and the old loops 332 are rising over the closed latches of the needles and will pass over the new loops of knitting yarn which have been put in the hooks of the needles, thus completing the knitting stitch as well known in the art. The guide bar tubes are now moving forward.

In `FIGURE 8a, at 330 degrees in the cycle, the knitting stitch has been locked over and completed. The plush points 43 have just dropped and released the last formed loops, the

guide bar tubes

32, 41 and 36 are all the way forward, and are ready to start back toward the needle side to be in position to start the next course of stitches. The loops 47 and 48 are straight across chains of stitches and the loop 47 or 48 is tied in in the same stitch of the same chain of stitches.

In the form of FIGURES l to 8 and 9 both of the double loops are oriented coursewise, and in the form of FIGURES la to 8a and l0 one of the double loops is oriented coursewise and the other walewise.

In the form of FIGURE 1l, one of the double loops is oriented coursewise and the other is oriented diagonally. In this fabric, unlike the others, there is only one loop in the same course and Wale, so that the feature of increased production is not present, but the diiereuce in orientation which will break up lining effects without dead layin of pile yarn does exist.

In FIGURE 1l the lines of stitches hold the bundles of backing yarn (like FIGURE 9, but not shown) and also hold pile yarn loops or pile projections 52 and 53 which are oriented warpwise and pile yarn loops or pile projections 52 and 53" which are oriented diagonally. In each case the rst loop of each pile yarn end is located diagonally between adjacent chain stitches in dilerent courses, while the second loop of each pile yarn end is formed between adjacent chain stitches in the same course.

It is understood that in the method of forming the fabric of FIGURE l1, it is necessary to consider both FIGURES 1b to 8b and FIGURES lc to 8c. To form the diagonal loops 52' and 53 and the weftwise loops 52 and 53, it is necessary to establish a previous binding point which is illustrated in FIGURES lb to 8b.

In FIGURE lb at zero degrees in the cycle, the last stitch has just been completed, forming previous loops S2', and 53, 53 around the plush points.

The needles and plush points are down in FIGURE lb, and the

guide bar tubes

32, 41 and 36 are moved to the rear to be in position to allow the plush points to rise in FIGURE 2b.

In FIGURE 2b the

guide bar tubes

32, 41 and 36 have moved to the rear or needle side. Plush points 43 have risen and face yarn guide tubes 41 have shogged one needle to the right to move the face yarn into the binding position shown at 54. l

Backing yarn guide tubes 36 are shogging to the right to carry the backing yarn 35 across a suiiicient number of needles to form a layin of backing yarn, suitably at least three needles.

Since no pile yarn loops are formed in this course, the remainder of the sequence is a standard Raschel warp knitting sequence. Thus in FIGURE 3b at 9() degrees in the cycle, the yarn guide tubes have moved front to the plush point side, No shogging of the pile yarn takes place at this point.

In FIGURE 4b at 150 degrees in the cycle, the guide tubes have moved all the way back to the needle side.

In FIGURE 5b at 210 degrees in the cycle, the yarn guide tubes have moved front in position to allow the needles to rise. Loops of the last knitting stitch slide down the needles, opening the latches and the now open hooks of the needles are ready for the new knitting stitch.

In FIGURE 6b at 270 degrees in the cycle, the yarn guide tubes have moved to the back past the needles and knitting yarn guide bar tubes 32 shog one needle space to the right to put knitting yarn 31 into the open hooks of the needles. s

In FIGURE 7b at 300 degrees in the cycle, the yarn guide tubes are moved to the front and the needles and plush points are dropping. Between this and FIG- URE 8b the new loop of the knitting yarn will be pulled down by the hook of the needle and the old stitch will rise over the closing latch and the needle hook with its new loop to complete the stitch at 330 degrees in the cycle of FIGURE 4b.

By FIGURE 8b at 330 degrees in the cycle, the binding point 54 has been completed.

'Ihe remainder of the steps of forming the fabric of FIGURE ll will be understood by reference to FIG- URES lc to 8c.

FIGURE 1c at zero degrees in the cycle is the first step in the method of constructing the pile loops of FIGURE ll. In FIGURE 1c the needles and the plush points are bound, and the

yarn guide tubes

32, 41 and 35 are moving to the back or needle side.

In FIGURE 2c at 30 degrees in the cycle, the yarn guide tubes are moving all the way back to the needle side, and the plush points 43 have risen, and the yarn guide tubes 36 are shogging a sufficient distance to the left, at least three needles, to form the layin of backing yarn 35.

On FIGURE 3c at 90 degrees in the cycle, the yarn guide tubes have moved all the way front to the plush point side.

Pile yarn guide tubes 41 have shogged two needles to the right, forming stretches 55 which will become new loops in the present course.

In FIGURE 4c at l5() degrees in the cycle, the

guide bar tubes

32, 41 and 36 have moved back to the needle side. The stretch of pile yarn 55 which was formed around two plush points has now been split into -two loops 52 and 52' and 53 and 53 by the loop of knitting yarn.

FIGURE 5c at 2l() degrees in the cycle, shows the

guide bar tubes

32, 41 and 36 moved forward to the plush point side. This is required to allow the needles 42 to rise. The loops of knitting yarn formed over the needles from the last stitch slide down the needles, opening the latches so that the hooks are open to receive the next knitted stitch.

In FIGURE 6c at 270 degrees in the cycle, the yarn guide tubes have moved back through the needles, and the knitting yarn guide tubes 32 have shogged one needle to the left to put knitting yarn 31 into the hooks of the needles 42.

In FIGURE 7c at 300 degrees in the cycle, the

yarn tubes

32, 41 and 36 have moved forward toward the plush point side and the knitting yarn 31 which was placed in the hooks of the needles is being pulled down and the old loops of the previous stitch will slide over the closed latching of the needle and over the new loop -to form a new knitting stitch.

In FIGURE 8c at 330 degrees in the cycle, the needles are dropping and forming a new knitting stitch, and the plush points have dropped and released the loops which correspond with the loops in FIGURE ll.

It is possible to combine the features of the various loops of the fabrics above referred to in a single fabric as shown in FIGURE l2. This fabric has loops which are bound in the same course of adjoining chains, loops which are diagonal and loops which are bound in successive stitches of the same chain.

Thus as shown there are on ends 40 loops 56 which are bound in successive stitches in the same chain, loops 56 which are bound in corresponding stitches of adjoining chains, loops S62 which are bound in successive stitches of adjoining chains and loops 563 which are bound in corresponding stitches of adjoning chains. Similarly on