US3703819A - Circular knitting machines - Google Patents

Circular knitting machines Download PDF

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Publication number
US3703819A
US3703819A US30176A US3703819DA US3703819A US 3703819 A US3703819 A US 3703819A US 30176 A US30176 A US 30176A US 3703819D A US3703819D A US 3703819DA US 3703819 A US3703819 A US 3703819A
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United States
Prior art keywords
cam plate
cams
terry
sinker
lower cam
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Expired - Lifetime
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US30176A
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English (en)
Inventor
Keith Gerald Townsend
David Arthur Harlow
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Bentley Engineering Co Ltd
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Bentley Engineering Co Ltd
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Publication date
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Publication of US3703819A publication Critical patent/US3703819A/en
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    • 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
    • D04B15/32—Cam systems or assemblies for operating knitting instruments
    • D04B15/34—Cam systems or assemblies for operating knitting instruments for dials

Definitions

  • a circular knitting machine having latch needles, sinkers and terry instruments is provided with a cam assembly having sinker operating cams and terry instrument cams mounted to permit relative adjustment between them to vary the relative timings of the sinker and terry instrument cams.
  • a cam assembly having sinker operating cams and terry instrument cams mounted to permit relative adjustment between them to vary the relative timings of the sinker and terry instrument cams.
  • these are respectively on different cam plates which are relatively adjustable, with the sinker cams engaging butts which project the opposite way to the terry instrument butts.
  • PATENTED NOV 28 I972 I SHEET 3 0r 6 CIRCULAR KNITTING MACHINES This invention is for improvements in circular knitting machines and is concerned more particularly with machines of the single cylinder type equipped with latch needles and sinkers and additional sinker-like elements provided for knitting elongated (terry) loops in certain areas of tubular fabric such as knitted footwear.
  • the invention seeks to provide means whereby adequate control of the additional instruments can be secured in a convenient and effective manner.
  • terry instruments for knitting fabric having elongated (terry) loops
  • the terry instruments and sinkers are mounted in pairs in the tricks of a sinker ring and are operated by butts respectively on the sinkers and terry instruments which are guided in a cam track which is largely common to the sinkers and terry instruments.
  • Adjustments of timing have been found to be necessary so that the relative positions of the sinkers and terry instruments can be adjusted to suit different types of yarn which may be used and the need for such adjustment is more especially needed in a machine having a substantial number of (for example, six) knitting stations spaced apart around a needle cylinder of small diameter.
  • a multi-feed machine i.e. a machine having a substantial number of knitting stations
  • the distance from the feeders to the knitting points is relatively short and yarns from the two feeders at a knitting station supplying the ground yarn and the terry yarn respectively, converge to the knitting point in a distance which is shorter than that on a machine having a single knitting station or only a small number of knitting stations.
  • a cam arrangement organized for control of the sinkers and terry instruments independently of one another with cams acting on the sinkers and other cams acting on the terry instruments to control their movements, such sinker cams and ferry instrument cams being arranged to permit relative adjustment between them to vary the relative timing of the operative movements of said sinkers and instruments.
  • the facility is provided for making adjustments whereby the terry instruments can be made to enter between the converging ground yarn and terry yarn.
  • a cam system comprising cams acting on butts projecting one way from the sinkers, and other cams acting on butts projecting in the opposite way from the terry instruments.
  • the two sets of cams related to the sinkers and instruments respectively are arranged to provide for the appropriate relative timings of the movements of the sinkers and terry instruments and can be made adjustable to vary such timing in a required manner.
  • the sinkers are outside sinkers which have butts cooperating with cams in a cam arrangement carried by a sinker ring and said sinker ring may also support cams at a different position to cooperate with butts on the terry instruments.
  • the cams-for operating the terry instruments may be mounted so as to be adjustable asa whole by turning about the cylinder axis relatively to the sinker cams. Further the several terry instrument operating cams may be adjustable relatively to one another about said axis.
  • FIG. 1 is a general plan view of part of the knitting head of a single cylinder circular knitting machine equipped with latch needles and having six knitting stations spaced apart around the needle circle;
  • FIG. 2 is a plan view of the sinker cam and terry instrument cam assemblies which are superposed, with the cam tracks for the terry instruments shown in chain dotted lines lying underneath the sinker cams;
  • FIG. 3 is an enlarged detail cross-sectional view in elevation taken on the line III-III of FIG. 2 and shows a sinker cam slide and the assembled sinker and terry instrument as well as a cam plate adjusting means;
  • FIG. 4 is a similar enlarged detail cross-sectional elevation view taken on the line IV-IV of FIG. 2 and shows a terry instrument cam slide with the assembled sinker and terry instrument;
  • FIG. 5 is a diagrammatic elevation view on an enlarged scale of the ground yarn and terry yarn being fed to the needles'as seen from within the needle circle in the direction of the arrow X in FIG. 1;
  • FIG. 6 is a plan view showing a segment of the cam ring assemblies in a modified form of construction, on a scale larger than that of FIG. 2;
  • FIG. 7 is a view in side elevation of parts shown in FIG. 6;
  • FIG. 8 is a detail elevation view of certain parts in cross-section taken on the line VIII-VIII of FIG. 6.
  • FIG. 1 only sufficient details have been shown to illustrate the part of the machine with which the invention is concerned.
  • the knitting stations are shown at l,2,3,4,5 and 6.
  • Some of the needles in the needle circle are indicated at 7 and a latchguard ring 8 is secured to the housing 9.
  • Yam trapping assemblies such as that shown at 10 are carried on a plate 11 which is maintained stationary within the needle circle on a supporting column 12 which is attached to the main housing 9 by means not shown.
  • the latchguard ring and trapper assembly can be raised clear of the needles by pivoting the housing about a shaft 13 which also carries feeder arms such as are shown at 14 and 15.
  • the feeder arms are so arranged that their operating linkages l6 cam collapse so that the assembly of feeders can be raised together with the latchring housing.
  • the sinker cam plate 17 (attached to the top of a housing 29, FIGS. 3 and 4) and a terry instrument cam plate 18 are contained in an assembly which is journaled on the upper end of the needle cylinder.
  • the arrangement in this type of machine is that the needle cylinder revolves within the sinker cam assembly which is itself prevented from revolving.
  • the sinker cam assembly may be allowed a limited amount of rotary movement known as shog, which is used for timing purposes when knitting is being performed by reciprocation.
  • the cam track 18a for actuating the terry instruments is constructed on the cam plate 18 which is attached to the underside of the sinker housing 29.
  • the sinker cam track.l7a shown in broken lines, is formed on the underside of the plate 17 for guiding the upstanding butts of the sinkers.
  • the terry instrument cam track 18a shown in chain dotted lines is formed on the upper side of plate 18 for guiding the downwardly disposed butts of the terry instruments which are mounted side by side with the sinkers. Sectional side elevations of the arrangement are shown in FIGS. 3 and 4.
  • the top of the cylinder 19 is provided with a flange or ring 24 having horizontal radial tricks each of which is situated between the vertical needle tricks as is normal in machines equipped with outside sinkers.
  • a terry instrument 20 and a sinker 21 are provided in each of the horizontal tricks as shown in FIG. 3.
  • the plates 17 and 18 are attached to the housing 29 (with the sinkers and terry elements sandwiched between them) in such a manner that they can be displaced angularly with respect to one another and then locked together. This relative adjustment allows their respective cam tracks to be timed so that the terry instruments 20 may be advanced at the most appropriate tim thus enabling the terry yarn to be drawn over the nibs 20a while the ground yarn passes under these nibs.
  • both the ground yarn 22 and the terry yarn 23(FIG.5) are fed fromseparate feeding holes situated at appropriate levels on a single feeder arm.
  • both yarns must be introduced to the needles at the same time and this is done by lowering the feeder arm so that the yarn extending from the feeders to the trapper cuts across the needle circle and is taken in the hooks of the needles.
  • the needles descend the stitch cam they draw loops of both yarns between the sinker draw edges and because at this stage the terry instruments are in their retracted position the needles draw double loops of the same size.
  • FIG. shows diagrammatically how the two yarns must be disposed to enable the nib a of the terry instruments to be inserted between them.
  • FIGS. 1 to 4 provides means for adjusting the terry instrument cam track 18a relatively to the sinker cam track on plates which are adjustable circumferentially with respect to one another and also relatively to the needle cams. The arrangement will now be described.
  • the needle cylinder 19 has the sinker ring 24 secured to it by segmental clamping plates 25 and screws 25a.
  • the sinkerring 24 revolves with the needle cylinder and carries the sinkers 21 and terry elements 20 with it in horizontally disposed tricks.
  • the sinker cam plate is shown at 17 and the terry cam plate at 18.
  • Their assembly is freely located on the sinker ring 24 and supported by the segmental plates 25.
  • the assembly is prevented from revolving by an eccentric pin 26 which engages in a keyway 18b cut in the underside of plate 18.
  • the pin 26 is screwed into a stationary part 27 and is rotatable by means of a hexagon flange 26a formed on the pin.
  • the sinker cam plate 17 is clamped under the large heads of screws 28 (FIG. 2) to the sinker housing 29 (FIG. 3) which is itself located on the spigot 18c of the terry cam plate 18 and secured by screws 30 (FIG. 2).
  • the holes 31 for these screws are slotted in the terry cam plate to allow the two cam plates to be adjusted circumferentially relatively to one another for the required relative timing adjustment.
  • timing of the terry instrument may then be obtained by using the first mentioned eccentric pin (26) to adjust circumferentially the terry cam track relatively to the sinker cam track and thereupon, by finally tightening the screws 30, the two cam plates are locked together.
  • the terry instruments can be retained in their retracted position until both yarns have been taken by the needles and then the instruments are advanced to cause the terry yarn to be drawn into extended loops.
  • the instruments are controlled in this manner by radially movable cams such as 32 (see FIGS. 2 and 4).
  • Each of these movable cams is attached to a slide such as 33 which is urged inwards by springs 34.
  • a roller 35 attached to the slide is provided to co operate with a cam 36a formed on a ring 36. Partial rotation of the ring causes the cam to act on the roller to retract the slide against the action of the springs.
  • the cams 36a are formed on the ring in any desirable order according to the knitting requirements.
  • FIG. 6 shows a segment of the modified cam ring as sembly seen in plan view corresponding to FIG. 2.
  • a typical one of the terry instrument cams is indicated in FIG. 6 at 132(32) and is pivotally mounted on a fulcrum pin 101 which is fixed to a curved adjusting plate 102.
  • the plate 102 is provided with a screwed post 104 in its underside which passes through a slot 1 18c in the base of the channel and permits the plate 102 to have individual adjusting movement along the channel.
  • a lock nut 104a is used to secure the plate 102 in adjusted position.
  • the sinker housing 129 (29) is cut away as shown at 129a FIGS. 6 and 7 to accommodate the cam 132.
  • a tension spring 106 the other end of which is attached to a post 107 on the cam 132, see FIG. 6 and 7.
  • the action of the spring 106 is to urge the cam in an anti-clockwise direction around the fulcrum pin 101 until the step 132a (FIG. 8) of the cam contacts the spigot rim 118d.
  • Attached to the spring anchor post 107 in cam 132 is a cable 108 for pulling the cam in a clockwise direction to withdraw it to an inactive position.
  • the cable 108 is carried in a cover 109 which is attached by an adjusting screw 110 to a post 1 1 1 fixed in the cam ring flange 118b.
  • each of the cams 132( 32) for controlling the terry instruments is adjustable individually in a circumferential direction to the'extent of the slot 118c(FIG. 6). This individual adjustment is additional to the collective adjustment afforded by moving the terry cam plate 18 relatively to the sinker cam plate 17 and allows the point of insertion of the terry instruments to be set differently at each yarn feeding position, appropriately for the knitting requirements.
  • each cam 132(32) is now controlled by an individual cable 108 from a suitable controlling means such as the main control drum of the machine.
  • a sinker assembly comprising:
  • operating means for said cams serving to control the set of operating butts for the terry instruments, said operating means comprising means for biasing said cams to operative positions and means for selectively moving said cams radially to inoperative positions.
  • a circular knitting machine as set forth in claim 1, comprising adjustable support means for mounting on the respective cam plate said cams serving to control the set of operating butts for the terry instruments, said support means comprising means for relative mutual circumferential adjustment of said cams and means for holding said support means in adjusted positions.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US30176A 1969-04-26 1970-04-20 Circular knitting machines Expired - Lifetime US3703819A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21422/69A GB1291574A (en) 1969-04-26 1969-04-26 Improvements in circular knitting machines

Publications (1)

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US3703819A true US3703819A (en) 1972-11-28

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US30176A Expired - Lifetime US3703819A (en) 1969-04-26 1970-04-20 Circular knitting machines

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US (1) US3703819A (cg-RX-API-DMAC7.html)
CS (1) CS161877B2 (cg-RX-API-DMAC7.html)
DE (1) DE2020524A1 (cg-RX-API-DMAC7.html)
ES (1) ES379099A1 (cg-RX-API-DMAC7.html)
FR (1) FR2046484A5 (cg-RX-API-DMAC7.html)
GB (1) GB1291574A (cg-RX-API-DMAC7.html)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041735A (en) * 1976-08-27 1977-08-16 Oakdale Knitting Company Auxiliary knitting station for hosiery knitting machine
US4314461A (en) * 1978-12-21 1982-02-09 Gianni Conti Knitting machine with latchless needles cooperating with external hook-type elements
US4535608A (en) * 1980-09-20 1985-08-20 Sipra Patententwicklungs-Und Beteiligungsgesellschaft Mbh Circular knitting machine for producing one-face plush webs
US5152157A (en) * 1990-04-27 1992-10-06 Lonati S.R.L. Circular knitting machine with casting-off sinker actuation device
US5511393A (en) * 1995-02-22 1996-04-30 Hu; Chao-San Sinker system for knitting face-loop and reverse-loop fabrics as well as face-loop jacquard and reverse-loop jacquard fabrics

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1208006B (it) * 1987-02-03 1989-06-01 Savio Spa Dispositivo di regolazione della posizione radiale delle platine in una macchina circolare da maglieria.

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1373770A (en) * 1921-04-05 Mechanism for knitting reinforced fabrics
DE518175C (de) * 1929-10-27 1931-02-12 Erich Barth Fa Strick- oder Wirkmaschine, insbesondere Rundstrickmaschine, zur Herstellung wendeplattierter Ware
GB349443A (cg-RX-API-DMAC7.html) * 1929-03-05 1931-05-26 Hemphill Company
US2123534A (en) * 1934-08-09 1938-07-12 Hemphill Co Cam block for knitting machines
US2148622A (en) * 1937-02-26 1939-02-28 Brinton Co H Knitting machine
US2421816A (en) * 1944-06-02 1947-06-10 Interwoven Stocking Co Method and machine for making seamless hosiery
US3192741A (en) * 1960-08-19 1965-07-06 Schubert & Salzer Maschinen Circular knitting machine for the production of partially reinforced hose goods and method therefor
US3293887A (en) * 1963-03-01 1966-12-27 H E Crawford Co Inc Sinker arrangement and control means for circular knitting machine
GB1064088A (en) * 1964-11-11 1967-04-05 Solis Societa A Responsabilita Improvements in circular-knitting machines for hosiery manufacture
US3399551A (en) * 1957-04-09 1968-09-03 Billi Giorgio Circular knitting machine for manufacture of stockings

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1373770A (en) * 1921-04-05 Mechanism for knitting reinforced fabrics
GB349443A (cg-RX-API-DMAC7.html) * 1929-03-05 1931-05-26 Hemphill Company
DE518175C (de) * 1929-10-27 1931-02-12 Erich Barth Fa Strick- oder Wirkmaschine, insbesondere Rundstrickmaschine, zur Herstellung wendeplattierter Ware
US2123534A (en) * 1934-08-09 1938-07-12 Hemphill Co Cam block for knitting machines
US2148622A (en) * 1937-02-26 1939-02-28 Brinton Co H Knitting machine
US2421816A (en) * 1944-06-02 1947-06-10 Interwoven Stocking Co Method and machine for making seamless hosiery
US3399551A (en) * 1957-04-09 1968-09-03 Billi Giorgio Circular knitting machine for manufacture of stockings
US3192741A (en) * 1960-08-19 1965-07-06 Schubert & Salzer Maschinen Circular knitting machine for the production of partially reinforced hose goods and method therefor
US3293887A (en) * 1963-03-01 1966-12-27 H E Crawford Co Inc Sinker arrangement and control means for circular knitting machine
GB1064088A (en) * 1964-11-11 1967-04-05 Solis Societa A Responsabilita Improvements in circular-knitting machines for hosiery manufacture

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041735A (en) * 1976-08-27 1977-08-16 Oakdale Knitting Company Auxiliary knitting station for hosiery knitting machine
US4314461A (en) * 1978-12-21 1982-02-09 Gianni Conti Knitting machine with latchless needles cooperating with external hook-type elements
US4535608A (en) * 1980-09-20 1985-08-20 Sipra Patententwicklungs-Und Beteiligungsgesellschaft Mbh Circular knitting machine for producing one-face plush webs
US5152157A (en) * 1990-04-27 1992-10-06 Lonati S.R.L. Circular knitting machine with casting-off sinker actuation device
US5511393A (en) * 1995-02-22 1996-04-30 Hu; Chao-San Sinker system for knitting face-loop and reverse-loop fabrics as well as face-loop jacquard and reverse-loop jacquard fabrics

Also Published As

Publication number Publication date
DE2020524A1 (de) 1970-12-17
ES379099A1 (es) 1972-09-01
CS161877B2 (cg-RX-API-DMAC7.html) 1975-06-10
GB1291574A (en) 1972-10-04
FR2046484A5 (cg-RX-API-DMAC7.html) 1971-03-05

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