US3402575A - Knitting of tubular articles on circular knitting machines - Google Patents

Knitting of tubular articles on circular knitting machines Download PDF

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Publication number
US3402575A
US3402575A US496007A US49600765A US3402575A US 3402575 A US3402575 A US 3402575A US 496007 A US496007 A US 496007A US 49600765 A US49600765 A US 49600765A US 3402575 A US3402575 A US 3402575A
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United States
Prior art keywords
needles
yarn
knitting
article
cam
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Expired - Lifetime
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US496007A
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English (en)
Inventor
Peberdy Roland
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Bentley Engineering Co Ltd
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Bentley Engineering Co Ltd
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/10—Circular knitting machines with independently-movable needles with two needle cylinders for purl work or for Links-Links loop formation
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/06—Sinkers
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/24—Sinker heads; Sinker bars
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/32—Cam systems or assemblies for operating knitting instruments
    • D04B15/325—Cam systems or assemblies for operating knitting instruments in circular knitting machines with two opposed needle cylinders
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/34—Devices for cutting knitted fabrics
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/42—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration
    • D04B9/46—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration stockings, or portions thereof

Definitions

  • ABSTRACT OF THE DISCLOSURE A procedure and means for knitting a succession of tubular articles on a circular knitting machine by which each article is pressed off from the needles on its completion and a fresh course to start a succeeding article is commenced during the pressing off of a preceding article while a portion of yarn temporarily joins the articles, such joining portion of yarn being severed before pressing off of the preceding article has been completed.
  • the means provided operates needle actuating cam means for the pressing off of each article and feeds yarn extending fom the end of a complete article into the hooks of the needles from which the preceding article has been pressed off, and also operates to sever the yarn in a length thereof extending across a small group of needles between the substantially completed and newly commenced articles.
  • This invention is for improvements in or relating to the knitting of tubular articles on circular knitting machines and is concerned more particularly with the production of knitted articles of footwear.
  • the invention has for an object to provide a simple and effective procedure for the production of a succession of knitted tubular articles.
  • the invention may be applied conveniently to use with circular rib knitting machines and especially to machines of the opposed co-axial needle cylinder type.
  • a method of knitting a succession of tubular articles on a circular knitting machine according to which each article on completion is pressed off from the needles and, before its pressing off is completed the setting up of a fresh course is commenced to start the next succeeding article with the yarn temporarily connecting the articles together, and during the pressing off of the preceding article the yarn joining it to the succeeding article is severed to separate the articles from one another.
  • An important advantage of the improved procedure is that the yarn feeder can be maintained in feeding position during transition from the knitting of one article to the knitting of the next, thereby avoiding the need to take any special steps to cause the free yarn end to be taken by needles which are devoid of stitches.
  • the yarn held by the last needle to knit a preceding article is laid across the stems of a group of needles immediately beyond the last needles holding loops of the preceding article and the severing takes place in a short length of yarn laid across such needle stems.
  • the severing of the yarn takes place after the yarn has been taken into the hooks of the needles succeeding said group and whilst the short length of yarn laid across the needle stem is held between the needles succeeding said group and those still holding loops of the preceding article.
  • Such severing takes place after the initial course of the succeeding article has been commenced by movement of needles into the hooks of which the yarn has been laid.
  • the severing of the yarn between succeeding articles may be etfected by subjecting the yarn to local strain to fracture it.
  • Such fracture may be brought about by diverting a portion of the yarn to elongate its path and thereby set up the bursting strain which diversion may be brought about by a sinker movement.
  • the invention also comprises a circular knitting machine organised to knit a succession of tubular articles and having means arranged to press off each article as soon as it is completed, means for feeding the yarn extending from the end of a completed article into the hooks of needles from which the fabric has been pressed off to commence setting up of a new course before the preceding article has been fully pressed off the needles, and means whereby after the preceding article has been completed and the new course started the yarn extending from the preceding article to the succeeding article is severed to separate the articles.
  • the yarn severing means may consist of means for subjecting the yarn t0 localised strain to burst it.
  • the yarn severing means conveniently comprises means for operating sinkers at appropriate times to engage yarn between the appropriate article and the next succeeding article and cause the yarn to be severed.
  • FIGURE 1 is an elevation view of a circular knitting machine to which the invention is applied:
  • FIGURE 2 is an enlarged detail elevation view in central cross-section of portions of the needle cylinders of the machine showing an article about to be pressed off and the commencement of knitting a succeeding article, and
  • FIGURE 3 is a developed view of a cam lay-out employed in the cam system of the machine being a machine having two yarn feeding stations.
  • the invention is illustrated in the drawings as being applied to an opposed needle cylinder circular knitting machine suitable for knitting mens socks and organised for transfer of double ended needles from one cylinder to the other in a manner well known to those skilled in the art for the purpose of changing between plain knitting and rib knitting as and when required.
  • the invention is also applicable to a machine having only a single needle cylinder as used for knitting plain fabric for example a machine organised for knitting ladies stockings or one organised for knitting other plain tubular fabric.
  • the circular knitting machine therein shown is of generally orthodox form comprising a supporting frame 10, bed plate 11, lower and upper needle cylinders 12 and 13, and a main control drum 14.
  • Lower and upper cam boxes and 16 are also shown, and the operation of movable instrumentalities used in controlling operation of the machine, such as bolt cams and yarn feeders, is effected by control rods banks of which are indicated at 17 and 18.
  • the machine also has supporting mountings 19 for yarn supply packages and brackets 20 and 21 carrying mountings 22 and 23 for yarn guiding and tensioning means.
  • the circularly knitted tubular articles in this case mens socks, are delivered downwardly through the bottom cylinder 12 into a discharge tube 24 through which they are drawn by air flow or suction to a delivery cup 25 from which they are discharged at appropriate times into a removable bucket-like container 26.
  • FIG. 2 shows a central section through adjoining parts of the needle cylinders 12 and 13, certain orthodox parts of the machine being shown diagrammatically in block outline form so that parts relevant to the invention can be seen more clearly.
  • the cylinder 12 is shown equipped with bottom cylinder sliders 27 carrying double ended needles 28 and within the upper end of bottom cylinder 12 there is a sinker ring 29 carrying inside sinkers 30 having butts 31 controlled by sinker cams 32, 33.
  • a tubular knitted article practically complete and partly pressed off from the needles is shown at 34 and it has loops of its final course still held on needles of the bottom cylinder indicated at 28a in FIG.
  • the socks 34 are normally knitted from the top or welt end to the toe using both the main and back feeds where appropriate and the procedure following the completion of each sock blank will now be described with reference to the cam layout shown in FIG. 3.
  • the cam 106 is subsequently drawn right out to allow the long butts to pass by also at clearing height.
  • Knitting of the final course of the finished sock is taking place at the main feed point A with sliders passing down the stitch cam 107.
  • the sliders are then raised through the engagement of their transfer butts with cam 108 to raise the needles to clearing height as shown at (and at 28a in FIG. 2).
  • Needles are being pressed-off at cam 101 (as the needles to the left of group 28a move fully downwards) and latches of empty needles are being opened as sliders are being raised by cam 104.
  • Empty needles are approaching the main feed point A at clearing height led by the group of seven or so needles (whose sliders have medium knitting butts) at heel height.
  • the yarn is laid by the feeder (shown at 37 in FIG. 2) from the last needle to knit prior to this group outside the stems of the group 28b at heel height and into the hooks of the following empty needles.
  • the stretch of yarn laid outside the stems of the group of seven or so needles at heel height is a more or less straight length of yarn being indicated at 38 in FIG. 2, and it is laid against the needles stems while the sinkers are out at the main feed point A.
  • the sinkers are thrown out, as normally, approximately between the points X -X in FIG. 3.
  • the needles following the group of seven or so needles 2812 at heel height (which have the leading end of yarn for the new article trapped between their stems and the sinkers) all receive yarn in their hooks at the main feed point A. These needles had all pressed off earlier at the back feed bolt cam 101 and their latches had been opened as previously described so that they are ready to receive the yarn at the main feed point A.
  • the butts of the group 28b at heel height pass above the back feed bolt cam 101 and the following needles after receiving the yarn are lowered by their butts passing down stitch cam 107 and are allowed to remain low, upthrow cam 108 being withdrawn, so that they do not clear their loops and are caused to pass the back feed station in this low position.
  • the sinkers re-engage the yarn before the needles are raised again.
  • Alternate needles are raised toclearing height by means of their pattern jacks lifting them so that their sliders pass up cam 104 and these alternate needles are then transferred by the patterning mechanism (not shown) to the top cylinder.
  • the needles thus arrive at the main feed point A in a 1/1 set-out, i.e., alternate needles in the top cylinder and intermediate needles in the bottom cylinder with the yarn following a Zig-zig path from the hooks of the intermediate (bottom cylinder) needles to the alternate (top cylinder) needles where it is held behind their own latches.
  • the respective slider butts of these needles follow tracks 109 and 110. It should be remembered that there are no actual knitted loops on these needles as they enter the main feed station A, and the yarn merely lies in a zig-zag path from needle to needle.
  • the plain needles remain low at the back feed (cam 108 being withdrawn) and the rib depressor 113 at the back feed lowers the rib loops so that the sinkers move in over the yarn.
  • the plain needles are then all raised up the clearing cam 104 and their sliders follow track 114 to cause them to knit at the main feed A.
  • the welt bolt is withdrawn at this point so that the formation of the welt starts immediately.
  • an elastic yarn in the top of the sock it may be introduced to a few needles knitting 1/1 rib just before the start of the welt.
  • the elastic yarn is actually fed to the needle of the first slider following the aforementioned group of seven or so medium butt sliders carrying the needles 28b in the middle of the short knitting butts.
  • the group of sliders 36 in the top cylinder immediately above this group have long butts to allow the welt bolt to be withdrawn at the commencement of the welt.
  • This group of long butts a few needles further than the group of medium butts in the bottom cylinder these few needles will knit 1/1 at the main feed to lock the start of the elastic yarn and will then enter the welt track a course later than normal.
  • the needle selection for the make-up courses desc-ribed in carrying out this invention is given by way of example only.
  • the method of parting the yarn du-ring the process of knitting, to divide the articles, may be used with other methods of commencing articles and is not in any way restricted by the example given.
  • a method of knitting a succession of tubular articles on a circular knitting machine comprising the steps of (a) pressing off from the needles each article on its completion, (b) commencing setting up a fresh course to start a succeeding article during pressing off of the preceding article, with a portion of yarn temporarily joining the completed and newly commenced articles, and (c) severing the joining yarn before the pressing off of the preceding article has been completed.
  • a method according to claim 4 wherein the localised strain for fracturing the yarn is produced by causing at the appropriate time elongation of the path of the yarn.
  • a circular knitting machine organised to knit a succession of tubular articles and having in combination with a needle cylinder equipped with needles and cam means for operating said needles, means to operate said cam means so as to press off each article from the needles as it is completed, means for feeding ya-rn extending from the end of a completed article into the hooks of the needles from which the preceding article has been pressed off to commence setting up fabric for a new article before the preceding article has been fully pressed off from the needles, and means for severing the yarn extending between the preceding article and the newly commenced article before the preceding article has been fully pressed off from the needles.
  • a circular knitting machine organised to knit a succession of tubular articles
  • the combination comprising a needle cylinder, needles in said cylinder, cam means for operating said needles, yarn feeding means organised to feed yarn to the needles and to continue such feed of the yarn from a preceding article to a succeeding article, means for pressing off each article from the needles as it is completed, means effective on completion of an article and on commencement of a succeeding article to sever the yarn between the articles to separate them, and additional cam means for raising a small group of needles following the last ones holding a preceding article so that stems of such raised needles receive a portion of the yarn in readiness for severance.
  • a combination according to claim 7 comprising a sinker bed, sinkers in said bed and sinker operating means arranged to cause the sinkers co-operating with the small group of needles to engage the portion of yarn laid across the stems of said needles.
  • a combination according to claim 7 wherein the said additional cam means comprises a bolt cam to effect raising of the small group of needles to receive the portion of yarn between the articles and butts are associated with said needles for selective engagement by said bolt cam.
  • a combination according to claim 7 comprising an inside sinker ring mounted within the needle cylinder, inside sinkers mounted on said ring and sinker cams organised to move sinkers associated with the small group of needles to move them inwardly when said needles are raised to engage with the portion of yarn against the needle stems.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Knitting Of Fabric (AREA)
US496007A 1964-10-16 1965-10-14 Knitting of tubular articles on circular knitting machines Expired - Lifetime US3402575A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB42246/64A GB1124922A (en) 1964-10-16 1964-10-16 Improvements in or relating to the knitting of tubular articles on circular knittingmachines

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US3402575A true US3402575A (en) 1968-09-24

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US (1) US3402575A (fr)
FR (1) FR1450226A (fr)
GB (1) GB1124922A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3492837A (en) * 1965-06-28 1970-02-03 Bentley Eng Co Ltd Knitting of tubular articles on circular knitting machines
US3919862A (en) * 1973-02-09 1975-11-18 Bentley Eng Co Ltd Separating tubular knitted articles
US3946577A (en) * 1972-04-18 1976-03-30 The Bentley Engineering Co. Ltd. Method of knitting an elasticised welt
US4070873A (en) * 1974-11-21 1978-01-31 Koninklijke Textielfabrieken M. Jansen De Wit B.V. Start up course for sock welt
US11131044B2 (en) 2012-09-19 2021-09-28 Thuasne Method for producing a tubular compression item, and item thereby obtained

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1285096A (en) * 1914-10-05 1918-11-19 Raymond Fisher Knitting-machine.
US1691887A (en) * 1926-10-22 1928-11-13 Dexdale Hosiery Mills Yarn-cutting means for knitting machines
US2385056A (en) * 1941-09-29 1945-09-18 Mellor Bromley & Co Ltd Circular knitting machine
US2398785A (en) * 1944-01-06 1946-04-23 Scott & Williams Inc Machine and method of relieving trapping strain on yarns
US2498096A (en) * 1948-05-27 1950-02-21 Vaughan Knitting Company Inc Cutting mechanism for knitting machines
US3282070A (en) * 1962-10-19 1966-11-01 Hosiery Equipment Ltd Knitting of tubular fabric

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1285096A (en) * 1914-10-05 1918-11-19 Raymond Fisher Knitting-machine.
US1691887A (en) * 1926-10-22 1928-11-13 Dexdale Hosiery Mills Yarn-cutting means for knitting machines
US2385056A (en) * 1941-09-29 1945-09-18 Mellor Bromley & Co Ltd Circular knitting machine
US2398785A (en) * 1944-01-06 1946-04-23 Scott & Williams Inc Machine and method of relieving trapping strain on yarns
US2498096A (en) * 1948-05-27 1950-02-21 Vaughan Knitting Company Inc Cutting mechanism for knitting machines
US3282070A (en) * 1962-10-19 1966-11-01 Hosiery Equipment Ltd Knitting of tubular fabric

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3492837A (en) * 1965-06-28 1970-02-03 Bentley Eng Co Ltd Knitting of tubular articles on circular knitting machines
US3946577A (en) * 1972-04-18 1976-03-30 The Bentley Engineering Co. Ltd. Method of knitting an elasticised welt
US3919862A (en) * 1973-02-09 1975-11-18 Bentley Eng Co Ltd Separating tubular knitted articles
US4070873A (en) * 1974-11-21 1978-01-31 Koninklijke Textielfabrieken M. Jansen De Wit B.V. Start up course for sock welt
US11131044B2 (en) 2012-09-19 2021-09-28 Thuasne Method for producing a tubular compression item, and item thereby obtained

Also Published As

Publication number Publication date
FR1450226A (fr) 1966-05-06
GB1124922A (en) 1968-08-21

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