US3080741A - Throat plate - Google Patents

Throat plate Download PDF

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Publication number
US3080741A
US3080741A US88043A US8804361A US3080741A US 3080741 A US3080741 A US 3080741A US 88043 A US88043 A US 88043A US 8804361 A US8804361 A US 8804361A US 3080741 A US3080741 A US 3080741A
Authority
US
United States
Prior art keywords
yarn
throat plate
roller element
roller
knitting
Prior art date
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
US88043A
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English (en)
Inventor
John J Mcdonough
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scott and Williams Inc
Original Assignee
Scott and Williams Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Scott and Williams Inc filed Critical Scott and Williams Inc
Priority to US88043A priority Critical patent/US3080741A/en
Priority to GB1263/62A priority patent/GB940727A/en
Priority to BE612808A priority patent/BE612808A/fr
Priority to ES0274011A priority patent/ES274011A1/es
Priority to DES77742A priority patent/DE1236712B/de
Priority to FR885988A priority patent/FR1312395A/fr
Application granted granted Critical
Publication of US3080741A publication Critical patent/US3080741A/en
Anticipated expiration legal-status Critical
Assigned to SCOTT & WILLIAMS INCORPORATED reassignment SCOTT & WILLIAMS INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SCOTT & WILLIAMS INC.
Expired - Lifetime legal-status Critical Current

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S91/00—Motors: expansible chamber type
    • Y10S91/03—Large area valve

Definitions

  • This invention relates to a throat plate for a knitting machine particularly adapted to stand up during the knitting of abrasive yarns.
  • a plurality of yarn fingers are providedwhich when in active position are held downwardly against and positioned by a rest surface or platformprovided in the throat plate, the fingers being held in active position by spring pressure. Since such fingers are conveniently located side by side, and thus occupy different positions on the throat plate when active, to secure uniformfeed to the needles of all of the yarns the throat plate is provided with an opening which provides a pair of recessesat shoulders through and from which the yarns are guided to the needles during rotary and reciprocatory knitting, one of the recesses being active during rotary knitting and during forward strokes in reciprocation, while the other of the recesses is active as a guide during reverse reciprocatory strokes.
  • throat plates of hardened steel were quite satisfactory and the recesses would stand up very well against wear because these yarns had only minor abrasive qualities.
  • the general object of the invention is to avoid abrasion without the use of ceramic material.
  • an elongate roller element is rotatably mounted between a pair of shoulders on the throat plate and defines a yarn guiding surface.
  • This roller element rotates slowly under the frictional action of the yarn and abrasion of the element is diminished by virtue of the continuous presentation of new'surface portions thereof to the yarn.
  • the roller element presents a smooth rounded surface over which 3,080,741 Patented M the yarn may readily slide from side to side of the throat plate in the course of reversals in the direction of knitting;
  • FIGURE 1 is a plan view of a desirable form of throat plate provided in accordance with the invention.
  • FIGURE 2 is a vertical cross-section taken on the indicated at 2-2 of FIGURE 1;
  • FIGURE 3 is a front elevation of the throat plate shown in FIGURE 1;
  • FIGURE 4 is a perspective view illustrating the associ-
  • FIGURE 5 is a front elevation of a modified embodi ment of the invention.
  • 1 FIGURE 6 is a vertical cross-section taken on the plane indicated at 6-6 in FIGURES. I
  • the throat plate comprises a supporting element 2, that may be formed of steel or other suitable material, on which there are provided shoulders having inwardly facing sides 4 bounding a central platform surface 6.
  • the front end of the platform 6 is chamferred as indicated at iii, and the front corners of the sides 4 are chamfered as indicated at 12, the lower portions of the latter chamfers being adapted to act, when necessary, as additional smooth yarn guiding surfaces.
  • the front or inner edge 16 of element 2 is arcuate and concentric with the axis of the needle cylinder so as to extend circumferentially in close proximity to the needles, and the front upper surface of element 2 is sloping as indicated at 14.
  • the supporting element 2 is arranged to be secured in the usual latch ring, in a recess of the latter, by screws passing upwardly through elongated shouldered openings 18 which provide for radial adjustment with respect. to the latch ring and needle cylinder, such a mounting being conventional.
  • passages or bores 20 are drilled transversely through both sides of the supporting element v2 in the area adjacent the chamfer 10. Bores 20 are in alignment, and form bearings for a rodplate with the needles and a typical like hard steel roller element 22.
  • the upper surface of roller element 22 lies in approximately tangential relation to the upper surface of platform 6, and intersects the vertical sides 4 at points immediately adjacent and above the lower ends of the previously mentioned chamfers 12. From FIGURE 1 it will be noted also that the forward edge of roller element 22 is substantially tangent to the arcuate edge 16.
  • the roller element 22 may be of the order of a few hundredths of aninch in diameter, and preferably is'formed of a hardened steel similar to that used for sewing needles. Infact, the roller element 22 may be formed of the actual stock from which such needles are made. Referring to FIGURE 4, there is particularly shown the. relationship of the improved throat plate with respect to yarn feeding devices and the needles. A single yarn feeding finger 26 is illustrated in its active position, feeding a yarn Y. It will be understood that in accordance with usual practice there may be a number of such yarn fingers located side-by-side and arranged to be lowered either singly or in groups to active positions wherein they rest upon the platform 6 under spring action.
  • the yarns such as Y are fed through eyes in these fingers 26, which have their lower ends raised slightly above the level of the platform. Conditions for rotary knitting are shown in FIGURE 4, and in this case the yarn Y in travelling from the fingers 26 to the needles tion, and passes over and in engagement with the roller element 22. As will be evident from FIGURE 4, different yarns will emerge from roller element 22 in similar paths irrespective of the lateral positions of the several yarn fingers. It will be evident that during reverse reciprocatory strokes of knitting a similar yarn guiding path is effected by roller element 22.
  • the rapidly moving yarn tends to spin the roller element, but as this is resisted by the friction of the roller within bores 20 the element rotates slowly. This rotation, however, is sufficient to prevent abrasion, primarily for the reason that a new surface constantly is being presented to the yarn and therefore the formation of the nucleus of a groove is prevented.
  • the roller element 22 may be free to shift axially to a limited extent within the bores 20 to prevent a concentfated area of the element from being constantly subjected to abrasion by the yarn. Normally, yarn passes from the yarn finger over the roller element 22 to the needles N without touching the chamfers 12, with the possible exception that when a feed goes into action the yarn may temporarily be carried into engagement with one of the chamfers.
  • the roller element 22 being primarily responsible for guiding the yarn.
  • the yarn in passing from one side thereof to the other, traverses an arcuate edge such as the edge 16.
  • a yarn must move uphill along this arcuate surface as it approaches the opposite side of the throat plate. This action may interfere with the positioning of the yarn in proper relationship to the needles when they begin to knit.
  • the yarn shifts from one side of the throat plate 'to the other the surface along which the yarn slides, namely the roller element 22, is straight. It has been found that, therefore, the yarn moves quickly and easily from one side to the other, insuring its correct positioning when the needles begin to knit.
  • the supporting element 2 has chamfers as indicated at 12 which at certain times may cooperate with the roller element 22 to guide the yarn.
  • the roller element may be provided with tapered shoulders at its ends to function in much the same mannor as the previously mentioned chamfers.
  • the roller element 22' is provided with outwardly conical shoulders 26.
  • the vertical sides 4 are milled out at 30 to provide clearances between the outer ends of shoulders 26 and the supporting element.
  • roller element 22' The purpose of such clearances is to allow axial adjustability of roller element 22'.
  • Such adjustability is provided by the particular means for mounting the element 22', which include tapered centers 28 threaded into the inner ends of bores 20' and providing points entering center openings in the roller ends.
  • the roller element 22' may be axially positioned by adjustment of the threaded centers 28 on which it rotates.
  • the throat means to said knitting elements.
  • FIGURES 5 and 6 functions in essentially the same manner as the throat plate previously described.
  • the roller element 22' is mounted on centers 28, and the shoulders 26 serve to prevent dropping of the yarn between the ends of the roller element and the sides 4', which would cause snagging.
  • greater freedom in the positioning and number of yarn fingers is afforded, in that fingers can be positioned closer to the sides 4' than in the case of FIGURES 1 to 4.
  • the yarn does not engage the stationary supporting element 2' and the yarn guiding action is provided wholly by the roller element 22', which, therefore, is the only element subject to abrasion and wear.
  • the roller element22 rotates under the frictional action of yarn travelling from the yarn feeding fingersto the needles new yarn guiding surfaces, including shoulders 26, continuously are being presented and such wear consequent'ly is minimized as previously discussed.
  • a throat plate com prising roller means and means mountingsaidroller means for rotation about a substantially horizontal axis, said roller means being engageable with yarn extending from yarn feeding means to the knitting elementsof the machine to thereby guide the yarn.
  • a throat plate according to claim 1 including means limiting movement of yarn along said roller means in a direction along said axis thereof.
  • a throat plate having a concavely arcuate front edge bounding the knitting elements of the machine and a roller element rotatably mounted by said throat plate in approximately tangential relation to said edge, said roller element being adapted to engage and guide yarn extending fromyarn feeding 5.
  • a throat plate for a circular, knitting machine com-- prising a solid elongate roller element and means rotatably mounting said roller element, the periphery of said roller element being engageable with yarn being fed for guiding thereof.
  • a throat plate for a circular knitting machine comprising a roller element and means providing opposed shoulders, said roller element being rotatably mounted in and extending between said shoulders and being engageable with yarn being fed for guiding thereof.
  • a throat plate including means providing a platform arranged to be engaged by and position a yarn finger, said roller element having its upper surface in substantially tangential relation to the upper surface of said platform.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US88043A 1961-02-09 1961-02-09 Throat plate Expired - Lifetime US3080741A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US88043A US3080741A (en) 1961-02-09 1961-02-09 Throat plate
GB1263/62A GB940727A (en) 1961-02-09 1962-01-12 Improvements in or relating to throat plates for knitting machines
BE612808A BE612808A (fr) 1961-02-09 1962-01-18 Perfectionnements aux machines à tricoter
ES0274011A ES274011A1 (es) 1961-02-09 1962-01-24 Un dispositivo de la placa de garganta para una maquina circular de hacer punto
DES77742A DE1236712B (de) 1961-02-09 1962-01-26 Fadenfuehrerbruecke fuer Rundstrickmaschinen
FR885988A FR1312395A (fr) 1961-02-09 1962-01-26 Perfectionnements aux machines à tricoter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88043A US3080741A (en) 1961-02-09 1961-02-09 Throat plate

Publications (1)

Publication Number Publication Date
US3080741A true US3080741A (en) 1963-03-12

Family

ID=22209034

Family Applications (1)

Application Number Title Priority Date Filing Date
US88043A Expired - Lifetime US3080741A (en) 1961-02-09 1961-02-09 Throat plate

Country Status (6)

Country Link
US (1) US3080741A (fr)
BE (1) BE612808A (fr)
DE (1) DE1236712B (fr)
ES (1) ES274011A1 (fr)
FR (1) FR1312395A (fr)
GB (1) GB940727A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392549A (en) * 1965-06-18 1968-07-16 Ace Eng Co Throat plate

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4407083A1 (fr) * 2023-01-26 2024-07-31 Umicore AG & Co. KG Guide-fil pour machine à tricoter pour des réseaux de métaux précieux

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1503713A (en) * 1923-07-12 1924-08-05 William H Sanders Thread guide
US2967412A (en) * 1957-11-15 1961-01-10 Hoefer Karl Ernest Throat plates for textile machines

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896434A (en) * 1959-07-28 Throat plate
CH44077A (de) * 1907-12-28 1909-07-01 Emerson Palmer Isaac Fadenführereinrichtung für Spinnmaschinen
AT49311B (de) * 1909-04-15 1911-08-10 Isaac Emerson Palmer Fadenführer.
CH132002A (de) * 1928-05-02 1929-03-31 Schweiter Ag Maschf Uberlaufrolle für Winde-, Spulmaschinen etc.
DE711468C (de) * 1938-02-21 1941-10-01 Textil Maschinenfabrik Alois S Vorrichtung zum Selbsttaetigen Regeln der Fadenspannung in Schermaschinen
US2370180A (en) * 1944-02-08 1945-02-27 Du Pont Yarn forwarding apparatus
DE1699717U (de) * 1955-02-09 1955-06-02 Degussa Fadenfuehrer.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1503713A (en) * 1923-07-12 1924-08-05 William H Sanders Thread guide
US2967412A (en) * 1957-11-15 1961-01-10 Hoefer Karl Ernest Throat plates for textile machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392549A (en) * 1965-06-18 1968-07-16 Ace Eng Co Throat plate

Also Published As

Publication number Publication date
ES274011A1 (es) 1962-03-16
DE1236712B (de) 1967-03-16
GB940727A (en) 1963-10-30
BE612808A (fr) 1962-07-18
FR1312395A (fr) 1962-12-14

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