US3246489A - Device for shaving off the loose ends of women's stockings on circular machines - Google Patents

Device for shaving off the loose ends of women's stockings on circular machines Download PDF

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Publication number
US3246489A
US3246489A US202014A US20201462A US3246489A US 3246489 A US3246489 A US 3246489A US 202014 A US202014 A US 202014A US 20201462 A US20201462 A US 20201462A US 3246489 A US3246489 A US 3246489A
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Prior art keywords
knives
slide
support
knife
stockings
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US202014A
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English (en)
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Bella Italo Della
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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

Definitions

  • This invention relates-to a yarn end cutter for circular knitting machines for cutting off' the loose yarn ends which womens stockings made on circular knitting machines exhibit in the lateral reinforcing zo'ne.
  • a first group consisting of apparatuses which act directly on the stocking during its making, that is to say duping the making oflthe' aforesaid reinforcement
  • a second group of devices for shaving the beards on al ready manufactured stockings which devices are manually operated by suitable personnel.
  • the apparatuses of the first group are generally of the type with electric resistances, rollers, s aw-blades or scissors, but these apparatuses leave too long beards and the stockings produced thereby are considered of poor quality; the same electrical resistance deviceswhich have been more recently adopted cut off the thread at a relatively large distance from the end of the stitch, which they are compelled to do by the safety margin required to avoid damaging the rest of" the stocking being'rnan u factured; furthermore, said electrical resistance appraratusesdo not allow a high spe d of rotation of the needle drum, and hence their adoption adversely affects the costs of productionof the stockings;
  • This invention in order to overcome the drawbacks described, proposes a system of specially shaped knives endowed with a relative back-and-forth motion which enables threads to be cut regardless of the direction of movement of the knives, the thread to be introduced between the cutting edges during each stage of the reciprocal shifting thereof, which results in [a very high rate of production.
  • a high firequency vibrator actuated for example, electromagnetically or pneumaticly or by like means;
  • thev preferred vibration frequencies range from 33 to 100 periods per second and, particularly with electromagnetic, alternating current vibrators, in dustrial frequencies are employed, i.e., 50 or 60- cycles per second.
  • This invention also provides for a device for the introduction and withdrawal of the knives provided with cutting edges into and from a space above the needle drum, by means of a slide actuated by a mechanical system, such as, for example, a flexible cable controlled by a cam provided on the drum which controls the several Patented Apr.
  • a mechanical system such as, for example, a flexible cable controlled by a cam provided on the drum which controls the several Patented Apr.
  • FIG. 1v shows a perspect e ew of a circular" machine for" womems stockings with a positioning of the yarn" and cutter accordingto this in vention;
  • FIG. 2 shows a side- View of theend-cutter
  • FIG. 3* shows a View fror'r'i above: of FIG"; 2;
  • FIG; 4 shows the configuration of the cutting edges of the knife actuated: by the vibrator", on enlarged scal'eg
  • FIG. 5* shows the shape ofi the cutting edges of the fixed lower cutting knife; on erilarge'd scale;
  • FIG. 6" shows across-section taken alongthe line VI VI of FIG: 2;
  • FIG. 7 shows three relative positions of the aniv'eserdowed with reciprocating relative motion
  • FIGS; 921 and 9b respectively-- show i'n al palrti'al s ide and firont: view the" arrangement of the; thread to be cut with platen-hooks: provided with noses: aecerdinr to the invention.
  • the slide3 is actuatedby means of a: flexible cable 6 the sheath of which isfastened in: an adjustable-manner known in itself against a support 7 integral withthe frame. 7
  • said cable 6 isactuated, in known and conventional manner, by a cam (not shown in tliedrawing) appropriatelypro'vided oni the drumlwhich'controls the various stages of the'working'of the'macliine, the cable acts in the direction of arrow A to push the slide" towards the working positionof the lowered needles 9:, indicated" by the numeral 8 in-FIG 1i
  • the arm 1 and-guide Sfi'xed thereto form a first' support fixed 'to*tlie knitting machine and'the slide 3 forms a' second suppor-t which isrnovably p'efi head;- illustrating the mounted between a working position and an inactive position on the first support.
  • the slide 3 carries at its top an assembly formed of two knives, 11 and 10 respectively, overlapping each other, the lower one being fixed and the upper one actuated in opposition to a spring 12 by self-contained oscillating means, for example, an electromagnetic vibrator 13 of known construction as for instance shown in the U.S. Patent 2,895,064 which acts so as to attract knife 11; it is manifest that the vibrator will be attached to the assembly of slide 3 and lower knife 10 with its support frame.
  • oscillating means for example, an electromagnetic vibrator 13 of known construction as for instance shown in the U.S. Patent 2,895,064 which acts so as to attract knife 11; it is manifest that the vibrator will be attached to the assembly of slide 3 and lower knife 10 with its support frame.
  • the movement of slide 3 relative to support caused by cable 6, takes place in opposition to a spring 15 which is attached respectively at 3 and 5, and which is biased so as to tend to move the slide-knives-vibrator assembly in a direction away from the crown of needles.
  • Thetwo knives and 11 carry laterally at their ends notches 20 and 21 of different shape and such that, when superimposed in any reciprocal positions, the lateral faces always present an aperture for the thread which is brought to it by any means, e.g., by the notched ring 24 forming part of a dial plate provided in this type of machine.
  • the two notches 20 and 21 provided with cutting edges on both sides of the slits are of different shapes, indicated exactly in FIGURES 4 and 5 on an enlarged scale for the sake of greater clarity, and, to be more precise, both have a V shape, notch 20 being wider than notch 21.
  • the drum controlling the various stages of the process of the machine causes, by means of a cam, not indicated in the drawings, a pull to be exerted on flexible cable 6 which moves slide 3 and the assembly of knives 10 and 11 and the vibrator 13 towards the crown of needles in the zone where the needles are lowered 8; at the same time the drum itself can actuate a switch which operates the vibrator 13 (e.g., alternating current, electromagnetic vibrator running at 60 cycles per second) which, in opposition to'spring 12, moves knife 10 back and forth relative to the fixed knife 11 which is almost tangential to the crown of needles: the thread, entrained by the notched ring 24, is introduced into the aperture which is always present between the notches 20 and 21 and is then cut off by the cutting edges.
  • a cam not indicated in the drawings
  • FIG. 7 In FIG. 7 are indicated three positions a, b and c in which a represents the intermediate position, b the position in which the upper knife 10 is at the end of its inward travel, and cthe position in which the upper knife 10 is at the end of its outward stroke.
  • the thread is obliged to pass along a distance S, and that during this time of passing along said distance, the upper knife executes at least two cutting movements.
  • the numeral 101 indicates one hook of the normal type of a plurality of hooks carried by the dial plate, which remains in a zone near to a thread 102 which has to be cut off and which is stretched between threadguide 103 and the head 104 of a needle relating to the knit that has been made.
  • the cutting of thread 102 by knives 10 and 11 can take place only at a point d which is at some distance from the head of needle 104, the angle a formed by said thread 102 and the plane of rotation of the needles is rather small.
  • the knives will cut the thread while it is arranged almost perpendicularly to the plane of rotation of the needles.
  • the thread can be carried between the noses of the platen hooks by means of known devices and, in particular, by the thread-guides themselves suitably rotated with a small lifting movement caused, for example, mechanically by means of cams according to a known motion already employed for other processes.
  • a yarn end cutter for circular knitting machines comprising, in combination, a first support adapted to be fixed to the knitting machine; a second support mounted other of said knives being reciprocable in one direction with respect to said one knife, said knives having cutting edges extending transverse to said one direction; self containedoscillating means mounted on said second support and operatively connected to said other knife for oscillating the same in said one direction; and moving means operatively connected to said second support for moving the same between said positions thereof.
  • a yarn end cutter for circular knitting machines comprising, in combination, an elongated support adapted to be fixed to the knitting machine; a slide mounted on said elongated support movable in longitudinal direction thereof between an inactive position and a working position; a pair of knives mounted superimposed upon each other on said slide, one of said knives being fixed to said slide and the other of said knives being reciprocable in one direction with respect to said one knife, said knives having cutting edges extending transverse to said one direction; self-contained oscillating means mounted on said slide and operatively connected to said other knife for oscillating the same in said one direction; and moving means operatively connected to said slide for moving the same between said positions thereof.
  • a yarn end cutter for circular knitting machines comprising, in combination, an elongated support adapted to be fixed to the knitting machine; a slide mounted on said elongated support movable in longitudinal direction thereof between an inactive position and a working position; a pair of knives mounted superimposed upon each other on said slide, the lower of the pair of knives being fixed to said slide and the upper of said knives being reciprocable in one direction with respect to said lower knife, said knives having cutting edges extending transverse to said one direction; self-contained oscillating means mounted on said slide and operatively connected to said other knife for oscillating the same in said one direction; and moving means operatively connected to said slide for moving the same between said positions thereof.
  • a yarn end cutter for circular knitting machines comprising, in combination, an elongated support adapted to be fixed to the knitting machine; a slide mounted on said elongated support movable in longitudinal direction thereof between an inactive position and a working position; a pair of elongated knives mounted superimposed upon each other on said slide and each having a front end portion projecting beyond said slide, the lower one of the pair of knives being fixed to said slide and the upper one being reciprocable in direction of its elongation with respect to the lower one, each of said knives being formed in said front end portion thereof with a substantially V-shaped notch extending transverse to the elongation of said knife and forming a pair of cutting edges, said V- shaped notches in said pair of knives overlapping each other at least in part; self-contained oscillating means mounted on said slide and operatively connected to said other knife for oscillating the same in said one direction; and moving means operatively connected to said slide for moving the same between said positions thereof.
  • a yarn end cutter as set forth in claim 5 wherein said upper knife is oscillated by said oscillating means through a stroke which is smaller than the maximum width of the V-shaped notch therein and said notches being arranged with respect to each other to always present an opening for the introduction of a yarn to be out between the cutting edges formed by said notches.
  • a yarn end cutter for circular knitting machines comprising, in combination, an elongated support adapted to be fixed to the knitting machine; a slide mounted on said elongated support movable in longitudinal direction thereof between an inactive position and a working position; a pair of knives mounted superimposed upon each other on said slide, one of said knives being fixed to said slide and the other of said knives being reciprocable in one direction with respect to said one knife, said knives having cutting edges extending transverse to said one direction; self-contained oscillating means mounted on said slide and operatively connected to said other knife for oscillating the same in said one direction; and moving means operatively connected to said slide for moving the same between said positions thereof, said moving means including spring means attached at opposite ends thereof respectively to said support and said slide for yieldably maintaining said slide in said inactive position, and a flexible cable attached at one end thereof to said slide and adapted to be attached at the other end thereof to a pattern drum of the knitting machine for moving said slide from said inactive to said working position.
  • a dial plate in combination, a dial plate; a crown of needles concentric to and adjacent to said dial plate, said needles being movable between a raised and a lowered position; and yarn end cutter means including an elongated support adapted to be fixed to the knitting machine, a slide mounted on said elongated support movable in longitudinal direction thereof between an inactive position and a working position, a pair of elongated knives mounted superimposed upon each other on said slide and each having a front end portion projecting beyond said slide, the lower one of the pair of knives being fixed to said slide and the upper one being reciprocable in direction of its elongation with respect to the lower one, each of said knives being formed in said front end portion thereof with a substantially V-shaped notch extending transverse to the elongation of the knife and forming a pair of cutting edges, said V-shaped notches in said pair of knives overlapping each other at least in part, selfcontained oscillating means mounted on said slide and operatively connected to said upper knife for oscill

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Coloring (AREA)
US202014A 1961-11-24 1962-06-12 Device for shaving off the loose ends of women's stockings on circular machines Expired - Lifetime US3246489A (en)

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IT2121661 1961-11-24
IT2343461 1961-12-28

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US3246489A true US3246489A (en) 1966-04-19

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US (1) US3246489A (de)
CH (1) CH394461A (de)
DE (1) DE1255845B (de)
GB (1) GB1006006A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310963A (en) * 1964-04-27 1967-03-28 Singer Co Knitting system for circular knitting machines
US3331220A (en) * 1965-04-26 1967-07-18 Singer Co Yarn trimming mechanisms
US3949571A (en) * 1974-11-29 1976-04-13 Hampshire-Designers, Inc. Elastic yarn binder and cutter
US4099392A (en) * 1976-06-21 1978-07-11 Francesco Lonati Yarn cutting and gripping device for a circular knitting machine

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1919123A (en) * 1931-04-02 1933-07-18 Scott & Williams Inc Binding and cutting mechanism for knitting machines
US1986753A (en) * 1932-02-02 1935-01-01 Acme Knitting Machine & Needle Knitting machine
US2000194A (en) * 1933-07-08 1935-05-07 Standard Trump Bros Machine Co Knitting machine
US2155301A (en) * 1938-02-17 1939-04-18 Singer Mfg Co Trimming mechanism for sewing machines
US2245205A (en) * 1941-06-10 Varn binder for knitting machines
US2245749A (en) * 1940-08-22 1941-06-17 James P Sullivan Circular knitting full length lady's hosiery machine
US2271302A (en) * 1939-08-31 1942-01-27 Moses Charles Knitting machine
US2448498A (en) * 1944-12-19 1948-08-31 Mellor Bromley & Co Ltd Mechanism for feeding yarn in circular weft knitting machines
US2869343A (en) * 1953-02-26 1959-01-20 Toone Nottingham Ltd B Knitting machine
US2952148A (en) * 1955-04-20 1960-09-13 Wayne Knitting Mills Lap yarn end cutting attachment for circular knitting machine
US3058438A (en) * 1960-12-19 1962-10-16 Frank D De Long Jr Cutting mechanism
US3113443A (en) * 1960-02-15 1963-12-10 Billi Giorgio Circular knitting machine having a device for severing yarn

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824436A (en) * 1957-02-27 1958-02-25 Hanes Hosiery Mills Co Yarn clamping and severing mechanism for knitting machines
US2970460A (en) * 1960-04-15 1961-02-07 Singer Fidelity Inc Toothed yarn controller
DE1195006B (de) * 1961-03-08 1965-06-16 Anton Loimann Fadenschneidvorrichtung fuer Rundstrick-maschinen
DE1220547B (de) * 1961-08-23 1966-07-07 Schubert & Salzer Maschinen Fadenschneidvorrichtung

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2245205A (en) * 1941-06-10 Varn binder for knitting machines
US1919123A (en) * 1931-04-02 1933-07-18 Scott & Williams Inc Binding and cutting mechanism for knitting machines
US1986753A (en) * 1932-02-02 1935-01-01 Acme Knitting Machine & Needle Knitting machine
US2000194A (en) * 1933-07-08 1935-05-07 Standard Trump Bros Machine Co Knitting machine
US2155301A (en) * 1938-02-17 1939-04-18 Singer Mfg Co Trimming mechanism for sewing machines
US2271302A (en) * 1939-08-31 1942-01-27 Moses Charles Knitting machine
US2245749A (en) * 1940-08-22 1941-06-17 James P Sullivan Circular knitting full length lady's hosiery machine
US2448498A (en) * 1944-12-19 1948-08-31 Mellor Bromley & Co Ltd Mechanism for feeding yarn in circular weft knitting machines
US2869343A (en) * 1953-02-26 1959-01-20 Toone Nottingham Ltd B Knitting machine
US2952148A (en) * 1955-04-20 1960-09-13 Wayne Knitting Mills Lap yarn end cutting attachment for circular knitting machine
US3113443A (en) * 1960-02-15 1963-12-10 Billi Giorgio Circular knitting machine having a device for severing yarn
US3058438A (en) * 1960-12-19 1962-10-16 Frank D De Long Jr Cutting mechanism

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310963A (en) * 1964-04-27 1967-03-28 Singer Co Knitting system for circular knitting machines
US3331220A (en) * 1965-04-26 1967-07-18 Singer Co Yarn trimming mechanisms
US3949571A (en) * 1974-11-29 1976-04-13 Hampshire-Designers, Inc. Elastic yarn binder and cutter
US4099392A (en) * 1976-06-21 1978-07-11 Francesco Lonati Yarn cutting and gripping device for a circular knitting machine

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GB1006006A (en) 1965-09-29
DE1255845B (de) 1967-12-07
CH394461A (it) 1965-06-30

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