US3740973A - Straight bar knitting machines - Google Patents

Straight bar knitting machines Download PDF

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Publication number
US3740973A
US3740973A US00188257A US3740973DA US3740973A US 3740973 A US3740973 A US 3740973A US 00188257 A US00188257 A US 00188257A US 3740973D A US3740973D A US 3740973DA US 3740973 A US3740973 A US 3740973A
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United States
Prior art keywords
points
groups
loop
needles
fashioning
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Expired - Lifetime
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US00188257A
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English (en)
Inventor
R Blood
E Marriott
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William Cotton Ltd
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William Cotton Ltd
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B11/00—Straight-bar knitting machines with fixed needles
    • D04B11/06—Straight-bar knitting machines with fixed needles with provision for narrowing or widening to produce fully-fashioned goods

Definitions

  • ABSTRACT A straight bar knitting machine and method of forming thereon a rib border followed by loop transfers for changing to fashioned non-rib fabric, with loop doublings in the last knitted rib course, in which two groups of loop transfer points are used for the loop doublings and embody fashioning groups of points, with pattern controlled lever, trip and ratchet means for causing the fashioning groups of points and the remainder to be relatively displaced and held in and out of mutual alignment, and loop filling-up points associated with the groups of points to fill up holes during fashioning by widening.
  • This invention is for improvements in or relating to straight bar knitting machines for making selvedge knitted blanks for garments each blank having a body portion and a rib border such for example as required for ladies jumpers, pullovers, cardigans and the like having a rib waist band and rib cuffs on the sleeves.
  • a rib border such for example as required for ladies jumpers, pullovers, cardigans and the like having a rib waist band and rib cuffs on the sleeves.
  • a filling-up point is slidably operable at the inner side of each point comb to fill up such holes.
  • the filling-up points are half points operated in known manner to spread loops laterally over the holes, but this method is not always suitable.
  • spear type filling-up points are operated in known manner to pick up those individual loops immediately behind the holes and to carry such loops forwardly over the holes.
  • the invention provides a method of producing selvedge knitted blanks each having a body portion and a rib border and embodying transferred loops comprising loop doublings between the body portion and the rib border and fashioning loops at the selvedges, which method includes imparting loop transfer operations to a pair of aligned rows of loop transfer points to form the loop doublings, imparting loop transfer operations to inner fashioning groups of the points to form the fashioning loops, effecting relative displacements between the inner fashioning groups of points and the remaining outer groups of points to bring the points into the alignment required for the loop doublings and out of such alignment when required for the inner fashioning groups of points to form the fashioning loops, and when the fashioning loops are for widening imparting filling-up operations to filling-up points at the inner end of the inner fashioning groups of points to fill up widening holes in satisfactory manner for all widths of the selvedge knitted blanks.
  • the invention also provides in a straight bar knitting machine, loop transfer means comprising, a narrowing head having a pair of adjusting point bars, a pair of loop transfer point combs carried by the point bars respectively, means mounting outer and inner groups of points in the combs for relative displacements between such outer and inner groups of points into and out of mutual alignment thereof, and controlled operating means operably associated with the point combs and adapted for effecting the relative displacements of the groups of points at required times.
  • the machine has a greater number of frame needles than the machine needles, means for knitting a rib border on the machine needles and spaced frame needles, means for transferring the loops last knitted on the machine needles to intervening frame needles between the spaced frame needles, means for operating the point combs to effect the loop doubling in the course of loops on the frmae needles under control of pattern mechanism, means under control of the pattern mechanism for displacing the outer groups of points out of alignment with the inner fashioning groups of points, means for knitting non-rib fabric onto the course of loops on the frame needles, means for operating the point combs for the inner fashioning groups of points only to fashion the non-rib fabric including, when widening, operating the'filling-up points, and means under control of the pattern mechanism for displacing the outer groups of points back into alignment with the inner fashioning groups of points.
  • the outer groups of points are slidably displaceable upwardly and downwardly relative to the inner fashioning groups of points.
  • the controlled operating mechanism for the outer groups of points includes trip mechanism adapted for releasably holding the outer groups of points in each position to which they are displaced.
  • the controlled operating mechanism includes an operating lever having a bifurcated end for releasable engagement with the trip mechanism during raising and lowering motions of the narrowing head.
  • the loop doubling mechanism is conveniently under control of a disc control shaft and the same control shaft has a control element for instigating displacement of the outer groups of points following the completion of the loop doubling.
  • Said bifurcated lever is conveniently under control of said control element through the medium of reversible ratchet means.
  • Conveniently prop means are operable for releasably holding the mechanism in its different operated conditions.
  • the mechanism is in duplicate one for each point comb.
  • FIG. 1 is a perspective view of needles and rib fabric showing transfer of machine needle loops to frame needles as previously proposed in a straight bar knitting machine.
  • FIG. 2 is a diagrammatic view of a first loop doubling stage as previously proposed in the transition course, using point combs,
  • FIG. 3 is a similar view to FIG. 2 showing a later loop doubling stage
  • FIG. 4 is a similar view to FIG. 3 showing a further loop doubling stage
  • FIG. 5 is a diagrammatic view of the rib fabric with the loop doublings and having non-rib body fabric knitted onto it, and with only an inner fashioning group of points in operative position.
  • FIG. 6 is a diagrammatic view of the fabric showing a first widening stage
  • FIG. 7 is a similar view to FIG. 6 showing a later widening stage with operation of a filling-up point
  • FIG 8 is a similar view to FIG. 7 showing a further widening stage with a widening hole filled up.
  • FIG. 9 is a diagrammatic front view of needles and points arranged for loop doubling.
  • FIG. 10 is a similar view to FIG. 9 with the points arranged for fashioning on wide fabric.
  • FIG. 11 is a similar view to FIG. 10 with the points arranged for fashioning on narrow fabric.
  • FIG. 12 is an enlarged front view of point combs.
  • FIG. 13 is a cross sectional view of one of the point combs.
  • FIG. 14 is an enlarged cross sectional view of controlled operating mechanism for parts of the point combs.
  • FIG. 15 is a detail view of propping means for said mechanism.
  • vertical beard needles 1 have cooperating with them spaced horizontal latch needles MN as disclosed for example in GB. U.S. Pat. No. 1,295,853, to which reference may be made although only the following description is necessary for a proper understanding of the present invention.
  • Rib fabric RB is knitted on the needles MN and on spaced ones of the needles 1.
  • Loop spreader elements LSE are carried by the needles MN.
  • the needles MN When it is required to change from rib to non-rib fabric the needles MN are advanced to spread their loops L, and their associated loop-less needles 1 are raised through these loops so that upon retraction of the needles MN the loops become transferred to the loop-less needles I thus forming with the loops on the other needles 1 a non-rib course on all the needles 1.
  • the number of side by side loops in the non-rib course is greater than the number required for starting non-rib fabric, and for this reason loop doubling is effected at spaced locations.
  • a pair of rows 2, 2a of loop transfer points 3, 3a FIGS. 9 to 11, are operated as hereinafter more fully described for the points 3 with reference to FIGS. 2 to 4.
  • the row 2 of points 3 are shown after having picked up one set of loops LL near the centre of the knitting section and having transferred the loops LL one needle inwards to form a first loop doubling LL. This leaves a loop-less needle la.
  • the row 2 of points 3 is re-set outwardly and is again operated to form a second loop doubling L2, FIG. 3, and this is repeated a required number of times until the innermost point 3P registers with the loop-less needle 1a.
  • the row 2 of points 3 is given a two-needle inward transfer to form a further loop doubling such as L3 FIG. 4 which also provides the needle 1a with a loop.
  • This sequence is continued progressively outwardly until the number of side by side loops is equal to that required for starting non-rib fabric, as disclosed in said Application.
  • FIG. 10 shows the inner fashioning points 3c, 3c! in position for cooperating with selvedges of wide fabric WF
  • FIG. 11 shows the same inner fashioning points 3c, 3d in position for co-operating with selvedges of narrow fabric NF.
  • the remaining points 3b, 3bl of outer groups are inoperative on the needles.
  • the point combs 4, 5 consist of mounting plates 4a, 5a, to which are secured the inner groups of fashioning points 3c, 30!, and which have vertical slideway formations for slide plates 8, 9, FIGS. 10, 11, which carry the outer groups of points 3b, 3bl.
  • the vertical slideways are shown at 10, 11, 12, 13 in FIG. 12 and this figure also shows that the filling-up point fingers 14, 15 are also mounted on vertical slideways 16, 17 and they have upper extensions 18, 19 through which they are operated in known manner.
  • the slide plates 8, 9 also have upper extensions 20, 21, 22, 23 through which they are operated.
  • the usual arms wich carry the narrowing head in pivotal manner are represented by the arm 29 on a shaft 30.
  • This arm 29 carries the bars 6, 7 the rods such as 28, rods such as 31, 32, 33 and a bracket 34.
  • a control lever 35 one arm 35a of which is connected to the rod 28 and the other arm 35b of which has an end roller 36 and laterally projecting peg 37.
  • a trip lever 38 to one arm 38a of which is connected a spring 39 and the other arm 38b of which has two spaced recesses 38c, 38d and an end nose portion 38e.
  • the trip lever is pivoted at 38f to the bracket 34.
  • a lever 40 pivoted at 40a to a frame part 41 and one arm 40b of this lever is bifurcated to form two fingers 40c, 40d.
  • the bifurcated lever 40 is operated, by means to be hereinafter described, to lower its arm 40b so as to displace the roller 36 and the trip arm 38 to raise the plate 8 to its effective position.
  • the peg 37 is disposed opposite the recess 380 so that when the narrowing head next lowers, the peg 37 engages in the recess 380 to maintain the plate 8 in its ineffective position.
  • the parts Upon upward return of the narrowing head the parts revert back to the positions with the peg 37 opposite the recess 380 as many times as is necessary for fashioning and until the bifurcated lever 40 is reverse operated to return the parts to the positions for loop doubling again in the next blank.
  • ratchet wheel 44 For operating the bifurcated lever 40 its other arm 40g is connected by a link 40f to an arm 42 on a rod 43 and also on the rod 43 is a ratchet wheel 44 having a limited number of teeth 45, 46, at opposite locations.
  • a pair of pawls 47, 48 are carried by arms 49, 50 on the rod 43 which are connected by links 51, 52 to a cam follower lever 53 engaging a cam 54 on the machines cam shaft 55.
  • a control plate 56 having steps 56a
  • This control plate 56 is connected by a link 57 to a control lever 58 which is operated by the pattern bits of a control disc 59 on a pattern control shaft 60 which is racked on as and when required in usual manner.
  • a prop mechanism FIG. 15, in which there is connected to the control lever 58 a link 61 which through a spring 62 and pin and slot 63, 64, is connected to a pawl 65 pivoted at 65a and having releasable engagement with either of two teeth 66, 67 of an arm 68 which is carried by the rod 48.
  • the arrangement is such that with the bifurcated lever 40 in theposition shown, i.e. with the plate 8 down, the pawl 47 was the last to operate through operation of the link 57 by the control lever 58 (see dotted position) being on a pattern bit of the control disc 59. In this position of the parts the pawl 65 would engage the upper tooth 67 to hold the racked parts operated. When the plate 8 is required to be lifted to ineffective position, the control lever 58 (see full line position) would drop off the pattern bit to displace the control plate 56 so as to render the pawl 47 inoperative and the pawl 58 operative.
  • controlled operating mechanism as herein described is wholly or in part duplicated for acting respectively on the two rods such as 28 for required control of the two plates 8 and 9 and their outer groups of points.
  • a straight bar knitting machine having a greater number of frame needles than the machine needles, loop transfer means comprising a narrow head having a pair of adjusting point bars, a pair of loop transfer points combs carried by the point bars respectively, means mounting outer and inner groups of points in the combs for relative displacements between such outer and inner groups of points into and out of mutual alignment thereof, controlled operating means operably associated with the point combs for effecting the relative displacement of the groups of points at required times, means for knitting a rib border on the machine needles and spaced frame needles, means for transferring the loops last knitted on the machine needles to intervening frame needles between the spaced frame needles, loop doubling means for operating the point combs to effect the loop doubling in the course of loops on the frame needles under control of a pattern mechanism means under control of the pattern mechanism for displacing the outer groups of points out of.
  • a machine according to any of claim 1 wherein the controlled operating means for the outer groups of points includes a trip mechanism adapted there releasably hold the outer groups of points in each position to which they are displaced.
  • controlled operating means includes an operating lever having a bifurcated end releasably engagable with the trip mechanism during raising and lowering motions of the narrowing head.
  • loop doubling means is under control of a disc control shaft and the same control shaft has a control element for instigating displacement of the outer groups of points following the completion of the loop doubling.
  • a machine according to claim 5 wherein the bifurcated lever is under the control of said control element through the medium of a reversible ratchet means.
  • a machine according to claim 6 including prop means for releasably holding the controlled operating means in its different operated positions.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US00188257A 1970-11-13 1971-10-12 Straight bar knitting machines Expired - Lifetime US3740973A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5405270 1970-11-13

Publications (1)

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US3740973A true US3740973A (en) 1973-06-26

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Family Applications (1)

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US00188257A Expired - Lifetime US3740973A (en) 1970-11-13 1971-10-12 Straight bar knitting machines

Country Status (6)

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US (1) US3740973A (fr)
CH (1) CH536377A (fr)
DE (1) DE2153029A1 (fr)
FR (1) FR2117098A5 (fr)
GB (1) GB1315025A (fr)
IT (1) IT942822B (fr)

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Publication number Publication date
CH536377A (fr) 1973-04-30
DE2153029A1 (de) 1972-05-31
GB1315025A (en) 1973-04-26
IT942822B (it) 1973-04-02
FR2117098A5 (fr) 1972-07-21

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