US3100976A - Yarn severing device for a circular knitting machine - Google Patents

Yarn severing device for a circular knitting machine Download PDF

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Publication number
US3100976A
US3100976A US89501A US8950161A US3100976A US 3100976 A US3100976 A US 3100976A US 89501 A US89501 A US 89501A US 8950161 A US8950161 A US 8950161A US 3100976 A US3100976 A US 3100976A
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US
United States
Prior art keywords
cutting edge
yarn
wheel
needles
stationary
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US89501A
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English (en)
Inventor
Billi Giorgio
Luchi Vinicio
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Individual
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Individual
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Publication date
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Publication of US3100976A publication Critical patent/US3100976A/en
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Classifications

    • 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
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/54—Thread guides
    • D04B15/58—Thread guides for circular knitting machines; Thread-changing devices
    • D04B15/60—Thread guides for circular knitting machines; Thread-changing devices with thread-clamping or -severing devices
    • D04B15/61—Thread guides for circular knitting machines; Thread-changing devices with thread-clamping or -severing devices arranged within needle circle

Definitions

  • a circular knitting machine havinga device for severing yarn with: drawn from the feed position, said device comprising a stationary cutting edge and a driven wheel having anonoircular cutting edge cooperating with said stationary cutting edge.
  • the present invention provides a circular knitting machine having a device for severing yarn withdrawn from the feed position, said device comprising two cooperating cutters, one of which is stationary and has a cutting edge, extending substantially tangentially to a cylindrical surface defined about the rotary axis of the machine and containing the edge of the cover which overlies the needle cylinder, said edge extending adjacent said drioal surface and having a non-circular peripheral cutting edge, said wheel being rotated to cooperate with the stationary cutting edge in a substantially continuous scissors action to sever yarn presented betweenusaid cutting edges.
  • the device Upon raising the yarn guide, the device severs the yarn closely adjacent the last stitch formed by the yarn thereby avoiding subsequent cutting of the yarn end by hand and oonsequenthandling of the fabric); a a
  • FIG. 1 is a diagrammatic axial sectional view of a circular knitting machine showing a yarn severing device according to the present invention
  • FIG. 2 is a plan view of the machine of FIG. 1;
  • FIGS. 3 and 4 illustrate two details respect-ively of the roller and the stationary cutting edge cooperating therewithin the yarn severing device.
  • the circular knitting machine has a needle cylin- In the drawthat the inner side of the wheel 11 on which the cutting edges 12 are formed, is pressed into con-tact with the fixed cutting edge 8a.
  • the shaft 10 is driven through a pair of bevel gears 14, 15,the gear 14 being coaxial with and driven by the plate 5 and the gear '15 being on the shaft 10.
  • the diameter of the gear 15 is less than that of the gear 14 so that the wheel 11 will rotate at a rotational speed equal to the rotational speed of the needle cylinder 1 multiplied by the step-up gear ratio.
  • a yarn severing device is located to sever said yarn coming from the yarn guide which has been raised to interrupt the feed.
  • This device is located on the cover 5 of the needle cylinder which is above the rotary plate 6 carrying welt hooks. Plate 6 is rotated at the same rotational speed as the needle cylinder by a known form of drive.
  • the severing device comprises a projection 8 formed on a stationary ring 7, which is mounted on the cover 5,
  • the projection 8 being provided with a cutting edge 8a the periphery of the ring 7.
  • the projection-:8 is extended outwardly and upwardly and the cutting edge 8a extends along substantiallylthe'whoie length of the projection.
  • the wheel 13 is formed with several steps defining teeth to provide several individual cutting edges as illustrated in the drawing, or the wheel 13 may be formed with a peripheral cutting edge having a single step.
  • the cutting edge 12 may be formed with a number of steps or teeth, substantially greater than that indicated in the drawing.
  • This shaft non-circular cutting edge'cooperating with said stationary cutting edge to cut the yarn withdrawn. from the needles, and means resiliently urging the wheel iaxially towards the axis of saidcylinder to press thenon-circular carries, at its outer end, a wheel 11 (see FIG. '3) formed with teeth similar to these of a. ratchet wheel.
  • Each tooth has a radial edge'anda peripheral cutting edge 12 extending angularly to the radialedge. . These teeth, they needle'cylinder carrying needles to which yarn is fed and cutting edge into 2; In a circular knitting machine having a rotatable engagement with the stationary cutting edge. c
  • cutting edge means tor withdrawing yarn from the needles at a pre determined fixed position with respect to the cylinder, a
  • cutting means having a stationary cutting edge, a rotatably driven wheel having a series of teeth, each of said teeth having a radial edge and a peripheral cutting edge angularly disposed to the radial edge and extending from the outermost point of the radial edge angularly inward toward the axis or the wheel, and means resiliently urging said Wheel axially inward toward said cutting means to engage the cutting edges of the teeth with the stationary cutting-edge as the wheel is rotated, whereby all yarns drawn between the stationary cutting edge and a peripheral cutting edge en-- 7 gaged therewithare instantly severed.
  • a device w herein the stationary cutting edge is longer than each of the peripheral cutting edges of the Wheel so that one of the peripheral cutting edges is always in engagement with the stationary 4.
  • cutters having a stationary cutting edge extending in a plane parallel toanother plane tangential to said cylinder 7 and parallel to the axis of the cylinder, the other cutter including a rotatable wheel, means rotating the wheel on an axis perpendicular to the axis of the cylinder, said wheel having a peripheral series of teeth, each of the teeth having a radial edge and a peripheral cutting edge angular-1y disposed to the radial edge and extending from I the outermost point of the radial edge angularly inward toward the axis of the wheel, and means resiliently urging said wheel axially inward toward said stationary cutting edge't-o engage the cutting edges of the teeth with the stationary cutting edge as the Wheel is rotated, said stationary cutting edge being longer than each'or'the peripheral cutting edges so that one'of the peripheral cutting edges is always in engagement with the stationary cutting edge, whereby all yarn drawn between'the stationary cutting edge and a peripheral cutting edge engaged therewith is instantly severed.
  • a device for severing yarn withdrawn from the needles comprising: a stationary cutting edge, a rotatablydriven wheel having a peripheral cutting edge cooperating with said stationary eutting'edge to cut the yarn withdrawn from J the needles, and means resiliently urging the wheel'axiat 1y toward the axis of said cylinder to press the peripheral cutting edge into continuous contact with the stationary:

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US89501A 1960-02-16 1961-02-15 Yarn severing device for a circular knitting machine Expired - Lifetime US3100976A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT269760 1960-02-16

Publications (1)

Publication Number Publication Date
US3100976A true US3100976A (en) 1963-08-20

Family

ID=11103189

Family Applications (1)

Application Number Title Priority Date Filing Date
US89501A Expired - Lifetime US3100976A (en) 1960-02-16 1961-02-15 Yarn severing device for a circular knitting machine

Country Status (6)

Country Link
US (1) US3100976A (fr)
BE (1) BE600149A (fr)
CH (1) CH377472A (fr)
DE (1) DE1205646B (fr)
FR (1) FR1280354A (fr)
GB (1) GB968695A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296837A (en) * 1963-12-20 1967-01-10 Carl Merz K G Maschf Thread cutting device
US3345834A (en) * 1963-09-26 1967-10-10 Parthum Richard Device for severing or cutting away superfluous thread ends by removing the same in circular knitting of knitted goods such as stockings or the like hosiery goods
US3488679A (en) * 1965-11-13 1970-01-06 Schubert & Salzer Maschinen Yarn severing device for circular knitting machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1271888B (de) * 1961-10-07 1968-07-04 Schubert & Salzer Maschinen Verfahren und Vorrichtung zum Abtrennen und Klemmen von Faeden an Rundstrickmaschinen
US3224230A (en) * 1962-03-24 1965-12-21 Sdruzeni Podniku Textilniho St Device for pneumatic holding of inactive yarns in a circular knitting machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2041859A (en) * 1934-09-14 1936-05-26 Du Pont Liquid level indicator
US2713254A (en) * 1953-02-12 1955-07-19 Minton Clarence Webb Yarn holder and cutters
US2952148A (en) * 1955-04-20 1960-09-13 Wayne Knitting Mills Lap yarn end cutting attachment for circular knitting machine
US2996904A (en) * 1956-06-11 1961-08-22 Ames Textile Corp Pile loop crushing method and apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3055199A (en) * 1956-06-13 1962-09-25 Gordon Company Yarn clamping and severing mechanism for knitting machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2041859A (en) * 1934-09-14 1936-05-26 Du Pont Liquid level indicator
US2713254A (en) * 1953-02-12 1955-07-19 Minton Clarence Webb Yarn holder and cutters
US2952148A (en) * 1955-04-20 1960-09-13 Wayne Knitting Mills Lap yarn end cutting attachment for circular knitting machine
US2996904A (en) * 1956-06-11 1961-08-22 Ames Textile Corp Pile loop crushing method and apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345834A (en) * 1963-09-26 1967-10-10 Parthum Richard Device for severing or cutting away superfluous thread ends by removing the same in circular knitting of knitted goods such as stockings or the like hosiery goods
US3296837A (en) * 1963-12-20 1967-01-10 Carl Merz K G Maschf Thread cutting device
DE1585187B1 (de) * 1963-12-20 1970-11-19 Carl Merz Kg Maschf Fadenabschneidvorrichtung an Rundstrickmaschinen
US3488679A (en) * 1965-11-13 1970-01-06 Schubert & Salzer Maschinen Yarn severing device for circular knitting machine

Also Published As

Publication number Publication date
BE600149A (fr) 1961-05-29
CH377472A (it) 1964-05-15
FR1280354A (fr) 1961-12-29
GB968695A (en) 1964-09-02
DE1205646B (de) 1965-11-25

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