US3640094A - Device for cutting and gripping threads in circular knitting machines and the like - Google Patents

Device for cutting and gripping threads in circular knitting machines and the like Download PDF

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Publication number
US3640094A
US3640094A US822149A US3640094DA US3640094A US 3640094 A US3640094 A US 3640094A US 822149 A US822149 A US 822149A US 3640094D A US3640094D A US 3640094DA US 3640094 A US3640094 A US 3640094A
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United States
Prior art keywords
cutting
thread
counterblade
needle dial
dial
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Expired - Lifetime
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US822149A
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English (en)
Inventor
Francesco Piana
Angelo Brega
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Mecmor SpA
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Mecmor SpA
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Publication date
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Publication of US3640094A publication Critical patent/US3640094A/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
    • D04B15/38—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

  • This disclosure relates to a device for cutting and gripping threads in circular knitting machines of the type with a fixed needle cylinder and a fixed needle dial arranged thereon and rotating thread guide units, said device comprising a shears unit including a cam-actuated mobile blade which extends radially to said needle dial and a counterblade which extends tangentially to the needle dial; resilient means being provided for permitting slight adaption movements of said counterblade tangentially to said needle dial.
  • the present invention relates to a device for cutting and gripping threads in circular knitting machines and the like.
  • the main object of the invention is that of providing a device for cutting and gripping threads in a circular knitting machine of the type mentioned above which permits such operation to be carried out in simple and, at the same time, safe manner.
  • Another object of the invenfion is that of providing a device for cutting and gripping threads in a circular knitting machine which is controlled by the same members employed for carrying out other operations, namely for the selection of the needles.
  • a device for cutting and gripping threads in circular knitting machines and the like of type with a fixed needle cylinder and a fixed needle dial arranged thereon and rotating thread guide units characterized in that one shears blade for cutting the threads arranged on the needle dial defines on its rear a butt which engages a control cam, and extending radially with respect to the needle dial, cooperates with a platelike counterblade which extends tangentially to the said needle dial and is in engagement with resilient means arranged to permit a certain adaption mobility of said counterblade in a direction tangential to the needle dial of the machine.
  • said cutting blade cooperates, and is fast with a thread braking or retarding pincer arranged to grip the thread during the cutting operation.
  • FIG. 1 shows, in plan view, a segment of the needle dial in which the device according to the invention acts
  • FIG. 2 shows, in exploded view, some details of the main components operating in such device
  • FIG. 3 is a section of the device taken along the line III--III of FIG. 1;
  • FIG. 4 shows a section taken along the line IV-IV of FIG.
  • FIG. 5 is a section along the line V-V of FIG. I;
  • FIGS. 6a and 6b show the detail of the coupling between the resilient counterblade and the fixed dial structure, in plan view and in vertical section, respectively.
  • reference numeral 1 indicates a radially grooved fixed needle dial of the knitting machine arranged over the needle cylinder (not shown). Above the dial there slides a rotating unit 2 to which is secured a control cam 3 of the mobile blade of the shears as well as the pincers, as will be seen hereinafter.
  • a sector of the dial and the cylinder is not provided with needles.
  • the device illustrated in FIG. I is placed at the end of the zone of the dial provided with needles.
  • the barlike mobile blade of the shears 16 which is guided in a respective groove 5, 6 arranged on the grooved block 4 and the grooved dial I, respectively, is provided on its back end with a narrowed seat l7 in which there is inserted a plate 18. Said plate I8 is also inserted in a narrowed seat 19 (FIG. I) provided in the control rod or stick 20, and in a narrowed seat 21 provided in a thread-braking pincer 22 whose working will be described hereinafter.
  • the barlike blade 16, the rod 20 and the pincer 22 are fast with one another and can effect a radial stroke under the action of a butt 23 which extends from the rod or stick 20 and which is guided in a shaped seat 24 (FIGS. I and 3) provided in the overhanging rotating cam 3.
  • the pincer 22 cooperates with a fixed thread-braking or retarding rod 25 and the seat 24 of the cam is shaped so that at the exit of the thread from the knitting, the rod or stick 20, guided by said groove 24, simultaneously causes the backward movement of the mobile blade 16 and the pincer 22 which respectively cooperate with the counterblade l2 and the fixed rod 25.
  • thread grippers On the near side of the cutting shears, in the advance direction of the thread, there also operates a unit of pincers 26 which cooperate the springlike member 28 which grip the thread but do not stop it (hereinafter called thread grippers). More precisely three thread-gripping stemlike pincers are provided (but there may be any number) which are generally indicated at 26. Said pincers are guided in respective grooves 5, 6 and are radially mobile due to the engagement of their butts 2'7 inside the groove 24 arranged on the rotating cam 3. Said stemlike pincers 2d cooperate with the thread gripper members 28 (in the illustrated embodiment there are three) which are pivoted at 29 on the block 7 and maintained in the position shown in FIG. 4 by the action of resilient laminas 30. As deducible from FIG. I, said gripper members 2% are arranged between the pincers 26 and are consequently in register with and pressed by means of resilient laminas 30 against the lands or reliefs which separate the grooves 6.
  • the cutting which is effected on the thread is clear: and precise since there is practically no play between the cutting edge 13 and the shears blade. This lack of play is not harmful since, according to the force which is exercised the cutting edge 13 (and dependent upon vmious factors among which are an imperfect adjustment, or a variable thickness of thread), the counterblade H2 is able to adapt readiiy due to its resilient tangential positioning to the machine.
  • pincer means arranged adjacent the initial working zone of the dial 1 provided with needles for being knitted again by the needles of the dial and the cylinder.
  • Said pincer means may be equal to that indicated with 25, 2%,
  • said cutting means for cutting the thread to form the selvedges of the open tubular fabric further comprise a blocklike member rigid with said fined needle dial, a guide in said blocklike element extend ng subsuuitialiy in a direction tangential to said fixed needie dial, a peg member slidable inside said guide, said counterblade member mounted on said peg member said resilient means comprising a spring member on said blocklike member urging peg member inside said guide in the direction of said barlilce member or" said cutting means, thereby to approach said counterblade to said barlike member.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US822149A 1968-05-06 1969-05-06 Device for cutting and gripping threads in circular knitting machines and the like Expired - Lifetime US3640094A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1615168 1968-05-06

Publications (1)

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US3640094A true US3640094A (en) 1972-02-08

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US822149A Expired - Lifetime US3640094A (en) 1968-05-06 1969-05-06 Device for cutting and gripping threads in circular knitting machines and the like

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US (1) US3640094A (de)
DE (1) DE1922726A1 (de)
ES (1) ES367202A1 (de)
FR (1) FR2007936A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817058A (en) * 1971-09-22 1974-06-18 V Lombardi Cylinder and dial construction for knitting machines
US3890809A (en) * 1973-02-20 1975-06-24 Riccardo Tenconi Circular knitting machine with pneumatic thread feeding devices
US3975926A (en) * 1975-02-24 1976-08-24 Riccardo Tenconi Feed device for circular knitting machines of the type manufacturing open fabric
US3999406A (en) * 1972-11-03 1976-12-28 Firma Gottlieb Eppinger Pantihose waist opening
US4099392A (en) * 1976-06-21 1978-07-11 Francesco Lonati Yarn cutting and gripping device for a circular knitting machine
US4121439A (en) * 1975-06-16 1978-10-24 Wildt, Mellor Bromley Limited Knitting machines
US4347718A (en) * 1979-10-03 1982-09-07 Hospal Medical Corporation Cutting elements for knitting machines
EP1847639A1 (de) * 2006-04-21 2007-10-24 H. Stoll GmbH & Co. KG Fadenschneidplatine einer Flachstrickmaschine
ITMI20110430A1 (it) * 2011-03-18 2012-09-19 Santoni & C Spa Piatto di macchina circolare per maglieria o per calzetteria del tipo con cilindro e piatto con dispositivo di taglio dei fili

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0066525B1 (de) * 1982-08-10 1986-02-19 Hospal Ag Verfahren und Vorrichtung zum gleichzeitigen Schneiden an mehreren Stellen eines Schussfadens einer Matte oder einer Strickware an einer Strickmaschine
IT1244605B (it) * 1990-09-14 1994-08-08 Mecmor Spa Macchina circolare per maglieria del tipo a cilindro e piatto con dispositivo di pinzatura e taglio dei fili per la produzione di tessuto aperto

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US357816A (en) * 1887-02-15 Thomas
US1356060A (en) * 1915-06-10 1920-10-19 Hemphill Mfg Company Yarn-severing device for knitting-machines
US3081609A (en) * 1961-01-30 1963-03-19 Singer Fidelity Inc Yarn severing in circular knitting machines
US3521466A (en) * 1963-05-24 1970-07-21 Karl H Tannert Circular knitting machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US357816A (en) * 1887-02-15 Thomas
US1356060A (en) * 1915-06-10 1920-10-19 Hemphill Mfg Company Yarn-severing device for knitting-machines
US3081609A (en) * 1961-01-30 1963-03-19 Singer Fidelity Inc Yarn severing in circular knitting machines
US3521466A (en) * 1963-05-24 1970-07-21 Karl H Tannert Circular knitting machine

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3817058A (en) * 1971-09-22 1974-06-18 V Lombardi Cylinder and dial construction for knitting machines
US3999406A (en) * 1972-11-03 1976-12-28 Firma Gottlieb Eppinger Pantihose waist opening
US3890809A (en) * 1973-02-20 1975-06-24 Riccardo Tenconi Circular knitting machine with pneumatic thread feeding devices
US3975926A (en) * 1975-02-24 1976-08-24 Riccardo Tenconi Feed device for circular knitting machines of the type manufacturing open fabric
US4121439A (en) * 1975-06-16 1978-10-24 Wildt, Mellor Bromley Limited Knitting machines
US4099392A (en) * 1976-06-21 1978-07-11 Francesco Lonati Yarn cutting and gripping device for a circular knitting machine
US4347718A (en) * 1979-10-03 1982-09-07 Hospal Medical Corporation Cutting elements for knitting machines
EP1847639A1 (de) * 2006-04-21 2007-10-24 H. Stoll GmbH & Co. KG Fadenschneidplatine einer Flachstrickmaschine
CN101058919B (zh) * 2006-04-21 2011-12-21 H.斯托尔两合公司 平针织机的切纱片、切裁装置和平针织机
ITMI20110430A1 (it) * 2011-03-18 2012-09-19 Santoni & C Spa Piatto di macchina circolare per maglieria o per calzetteria del tipo con cilindro e piatto con dispositivo di taglio dei fili
WO2012126778A1 (en) * 2011-03-18 2012-09-27 Santoni S.P.A. Dial of circular hosiery knitting machine of the type with cylinder and dial with yarn cutting device
CN103429805A (zh) * 2011-03-18 2013-12-04 桑托尼股份公司 具有筒和带有纱线切割装置的转盘的类型的圆形织袜机的转盘
US20140007625A1 (en) * 2011-03-18 2014-01-09 Santoni S.P.A. Dial of circular hosiery knitting machine of the type with cylinder and dial with yarn cutting device
US8769996B2 (en) * 2011-03-18 2014-07-08 Santoni S.P.A. Dial of circular hosiery knitting machine of the type with cylinder and dial with yarn cutting device
CN103429805B (zh) * 2011-03-18 2015-11-25 桑托尼股份公司 具有筒和带有纱线切割装置的转盘的类型的圆形织袜机的转盘

Also Published As

Publication number Publication date
ES367202A1 (es) 1971-04-01
DE1922726A1 (de) 1969-11-20
FR2007936A1 (de) 1970-01-16

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