US3834187A - Cam system for double cylinder knitting machine - Google Patents

Cam system for double cylinder knitting machine Download PDF

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Publication number
US3834187A
US3834187A US00263691A US26369172A US3834187A US 3834187 A US3834187 A US 3834187A US 00263691 A US00263691 A US 00263691A US 26369172 A US26369172 A US 26369172A US 3834187 A US3834187 A US 3834187A
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United States
Prior art keywords
lifter
selectors
needle
jacks
cylinder
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Expired - Lifetime
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US00263691A
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English (en)
Inventor
P Zahradka
L Bozejovska
A Dvorakova
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Elitex Zavody Textilniho
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Elitex Zavody Textilniho
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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
    • D04B15/32—Cam systems or assemblies for operating knitting instruments
    • D04B15/325—Cam systems or assemblies for operating knitting instruments in circular knitting machines with two opposed needle cylinders

Definitions

  • the present invention relates to a double cylinder circular knitting machine of the multifeed type with a cam system for controlling the selectors and jacks so as to provide for control of the needles.
  • the machine is provided with a patterning device for selecting the needles to be moved into operative position, e.g. by means of electromagnets acting upon the control butts of swingable selectors.
  • each knitting feed of such machines is provided with one patterning device, and a further patterning device is provided for transferring the needles into the upper needle cylinder.
  • the two cylinder circular knitting machines hitherto known guard against the changing of needles to an upper needle cylinder if such needles were not preselected into a first knitting feed.
  • the operation of the patterning devices is mutually coupled.
  • the primary object of the present invention is to reduce the number of patterning devices and to permit independent functioning of the remaining patterning devices.
  • a two cylinder multifeed knitting machine having a cam system for controlling swingable selectors and their associated needle jacks and needles; the machine is provided with a patterning device adapted to act upon the selectors and thus select needles for transfer into operative position; the machine comprises first lifters positioned in advance of the point at which the needles are transferred from the lower to the upper of said cylinders, the first lifters being adapted to act upon the control butts of selectors which were selected in the preceding patterning system by said patterning device and upon the needle jacks associated therewith.
  • Stitch cam means is located in juxtaposed relation to the first lifter for the selected selectors.
  • a second lifter for the nonselected needle jacks is provided in the direction of rotation of said needle cylinders and a path is established for passage of the control butts of the non-selected needle jacks behind the lifting edge of the second lifter below the path of the control butts of the selected jacks.
  • the patterning device is positioned below said path adapted to select the control butts of selectors.
  • a third lifter is mounted behind the patterning device adapted to act upon the control butts of selected selectors, the clearing edge of a stitch cam for said nonselected needle jacks being positioned in the needle jack cam system behind the lifting edge of said lifter, a space being provided below said clearing edge adapted to permit mutual contact of the non-selected needle jacks and selected selectors.
  • a fourth lifter for the selected selectors is positioned in the direction of rotation of said needle cylinders, the fourth lifter being adapted to receive the selectors lifted by the third lifter and thus permit movement of the associated needle jacks on to a distributing lifter adapted to effect a transfer of the needles associated with the selected needle jacks to the upper cylinder.
  • the cam system is provided for the upper needle cylinder including a further lifter for the needle jacks having a slope opposed to that of the distributing lifter whereby needles are transferred from the upper needle cylinder to the lower needle cylinder.
  • lifters are provided, in front of the point at which the needles of the lower needle cylinder are transferred into the upper needle cylinder.
  • the lifters act on the selectors and their associated jacks which are selected in the preceding knitting feed by the patterning device, e.g. by means of an electromagnet, and by the stitch cam for the non-selected jacks.
  • the path of the control butts of said non-selected jacks is situated lower and behind the lifting edge of the lifter than the path of the control butts of the selected jacks.
  • a patterning device for selecting the control butts of the selectors, is arranged, and behind the patterning device there is situated a lifter for the control butts of the selected selectors. Behind the lifting edge of said last-mentioned lifter is situated, in the cam system for controlling the jacks, a stitch cam having an edge for engaging the nonselected jacks. In the space below said stitch edge the non-selected jacks and selected selectors are directed into mutual contact, there being no cam arranged in 5 the path of the selected selectors.
  • a lifter for the selected selectors which were already lifted by the preceding cam, this lifter enabling the transfer of needles into the upper needle cylinder.
  • a lifter for the jacks sloped oppositely to the lifting edges of the two lifters in the cam system for controlling the control butts of the selected selectors, this lifter for the jacks being adapted to transfer the needles into the lower needle cylinder.
  • FIG. 1 represents the cam system of a first knitting feed, including an indication of the location of an electromagnet
  • FIG. 2 illustrates control cams arranged intermediate the first knitting feed and a second knitting feed, with an indication of the location of another electromagnet
  • FIG. 3 shows the cam system of the second knitting feed
  • FIG. 4 is a vertical section through a double cylinder knitting machine, showing the arrangement of the present invention, at line V of FIG. 2.
  • FIGS. 1, 2 and 3 are continuous of each other showing the cam systems in schematic form. It is to be understood, that in the accompanying drawings, the cam arrangement and system controlling the jacks, needles, etc. is shown schematically in developed plan view. It is to be understood, that in the accompanying drawings, the cam arrangement and system controlling the jacks, needles, etc. is shown schematically in developed plan view. It is to be understood, that in the accompanying drawings, the cam arrangement and system controlling the jacks, needles, etc. is shown schematically in developed plan view. It
  • cams are actually arranged in annular structure about the needle cylinders in contact with the appropriate knitting instruments.
  • Known two cylinder circular knitting machines are provided with both a lower and an upper needle cylinder, each having a plurality of longitudinal grooves axially aligned about their circumference.
  • jacks provided with control butts and knitting needles without control butts.
  • swingable selectors, jacks, and needles again with control butts.
  • the first cam'system running in the direction of the arrow for controlling the jacks A in the upper needle cylinder consists of a stitch cam 1 (FIG. 1, upper portion), a stitch cam 2 and an auxiliary cam 3. In front of thisfeed are arranged cams 4, 5, 6. This knitting feed is completed by cam 7h.
  • the first cam system for controlling the jacks in the lower needle cylinder consists of a guide cam 7, a left upper stitch cam 8 and a right upper stitch cam 9, a left lower stitch cam 10 and a right lower stitch cam 1 1, below which auxiliary cams 12, '13 are arranged.
  • An auxiliary cam 14 is situated therebetween.
  • cam 15, additional earns 16 and 17, stitch cam 18 (FIG. 1, central portion), cams 19, 20, 21, 22, (FIG. 2, central portion) lifters 23, 24, 25. (FIG. 2, central portion).
  • distributing lifters 26 and 27 having an upward slope, and cams 28, 29, 30 for controlling the lower jack butts, such as for example, those designated by x and y in the drawings.
  • cams 28, 29, 30 for controlling the lower jack butts, such as for example, those designated by x and y in the drawings.
  • a stitch cam 31 and earns 32, 33, 34, as well as lifter 35 which defines a downward slope.
  • These latter act in the cam system for controlling the jacks in the upper needle cylinder and because of its opposite slope to that of the distributing lifters provides for the transfer of the needles from the upper cylinder to the lower cylinder.
  • a selector cam system (FIG. 3, lower portion) comprising a lifter 36, a stitch cam 37, lifters 38, 39, cam 40, stitch earns 41, 42 and cam 43.
  • the second cam system for controlling the jacks in the upper needle cylinder consists of a stitch cam 44 (FIG. 2, upper portion), a stitch cam 45 and an auxiliary cam 46. Before this system there are arranged cam 47 for reaching the closing position, cam 48, lifter 49 and stitch cam 50 for controlling the lower control butts of the jacks.
  • the second cam system for controlling the jacks in the lower needle cylinder (FIG. 2) consists of a stitch cam 5 1, a stitch cam 52 and an auxiliary cam 53.
  • cam 58 (FIG. 1, central portion), stitch earns 59 and cam 60.
  • cams (FIG. 2) and the cams of the first system (FIG. 2, lower portion) cam 61, stitch cams 62, 63, lifters 64, 65, 66 (FIG. 2, lower portion) and cams 67, 68, 69 (FIG. 1, lower portion) are arranged in the selector cam system.
  • the path of the control butts, jacks A and needles B are indicated by the directional arrows.
  • an electromagnet D is provided along axis V for selecting needles for transfer into the upper needle cylinder.
  • cams 25, 26 and 29 In operation, and in order to produce a patterned knitwork the whole cam system is initially in operation except cams 25, 26 and 29; that is, these latter cams are lowered so as not to engage any jack butts.
  • the electromagnet located along axis V selects, according to the patterning device, the selectors which are to be swung out.
  • the non-selected selectors are lifted by means of lifters 65 and 64 in the direction of arrow A and thereby the associated jacks and needles are directed into operative position by the passage of the control butts in the direction of arrow A, (central portion FIG. 1).
  • the jacks and associated needles thus are transferred through the second knitting system.
  • control butts of the selected selectors are cleared by a stitch cam 63 and pass in the direction of arrow B (lower portion FIG. 1 whereas the control butts of the jacks pass in the direction of arrow B, (central portion FIG. 1).
  • Stitch cam 62 clears the control butts of the nonselected selectors back into the path of the control butts of the selected selectors and they move together in the direction of arrow B.
  • control butts, or the selected selectors, respectively are lifted in the direction of arrow C (FIG. 2) and the control butts of the associated jacks raised in the direction of arrow C into the operative position and pass to the first knitting feed.
  • the control butts of the non-selected selectors pass in the direction of arrow B, and the control butts of the jacks associated therewith pass along the lower path in the direction of arrow C and are lifted by lifter 24 and again cleared by stitch cam 18.
  • the control butts of the selected selectors are cleared by stitch cam 37.
  • the selectors, or their control butts, respectively, can pass, from the point of arrangement of the electromagnet along axis V in three directions.
  • the control butts of the non-selected selectors pass in the direction of arrow D. They are not lifted by lifter 38, and thus do not contact the lifter 39 and do not result in the lifting of their associated jacks on to the distributing lifter 27, without bringing the jacks to the conventional dividing cam normally provided to transfer needles into the upper needle cylinder.
  • Selectors which passed in the direction of arrows E and F are swung out and thus pass as far as the electromagnet mounted at axis V
  • the electromagnet selects further from those selectors whose control butts have passed in the direction of arrow D according to the program and routes them to a group of selectors whose control butts have passed in the direction of arrows E and F. The whole cycle is then repeated.
  • a two cylinder multi-feed knitting machine including upper and lower needle cylinders and having a mu]- ti-component cam system for controlling the longitudinal movement of pivotal selectors and their directly associated needle jacks and needles, said machine being provided with a patterning device adapted to act upon said selectors to cause them to selectively engage components of said cam system and thus select needles for transfer into operative position; said cam system comprising first lifters positioned in advance of the point at which said needles are transferred from the lower to the .upper of said cylinders, said first lifters being adapted to act upon the control butts of selectors which were selected in the preceding patterning system by said patterning device and upon the needle jacks associated therewith, stitch cam means being located in juxtaposed relation to the first lifter for said selected selectors, a second lifter for the non-selected needle jacks being provided in the direction of rotation of the needle cylinder supporting said non-selected needle jacks, a path being established for passage of the control'butt
  • a two cylinder multifeed knitting machine according to claim 1, wherein said patterning device is pro. vided with electromagnetic meansfor selecting the selectors.
  • a two cylinder multifeed machine wherein a first electromagnetic means is positioned along a line intermediate said first and thrid lifters and a second electromagnetic means for selecting additional selectors is positioned along a line beyond said third lifter.
  • a two cylinder multifeed machine according to claim 3, wherein a further lifter is positioned in the path of the control butts of said selected selectorsadapted to receive said butts after same have been raised by the said third lifter.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US00263691A 1971-06-18 1972-06-16 Cam system for double cylinder knitting machine Expired - Lifetime US3834187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS4512A CS162084B1 (fr) 1971-06-18 1971-06-18

Publications (1)

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US3834187A true US3834187A (en) 1974-09-10

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US00263691A Expired - Lifetime US3834187A (en) 1971-06-18 1972-06-16 Cam system for double cylinder knitting machine

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US (1) US3834187A (fr)
CS (1) CS162084B1 (fr)
DE (1) DE2226765A1 (fr)
FR (1) FR2142531A5 (fr)
GB (1) GB1377403A (fr)
IT (1) IT956343B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439313A (en) * 1980-12-05 1984-03-27 The Lummus Company Removal of arsenic impurity from hydrocarbons

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2412248A (en) * 1944-10-12 1946-12-10 Scott & Williams Inc Knitting method and machine
DE1065126B (de) * 1955-05-23 1959-09-10 Carl Merz K G Maschf Mustervorrichtung fuer Rundstrickmaschinen, insbesondere Doppelzylinder-Rundstrickmaschinen
US3046760A (en) * 1955-06-27 1962-07-31 Bentley Eng Co Ltd Circular knitting machine
US3063269A (en) * 1959-08-01 1962-11-13 Sdruzeni Podniku Textilniho St Circular knitting machine having a patterning device
GB987137A (en) * 1961-08-10 1965-03-24 Sdruzeni Podniku Textilniho St Double-cylinder knitting machine
US3283541A (en) * 1963-02-14 1966-11-08 Dubied & Cie Sa E Method and device for the individual control of selecting members
GB1167418A (en) * 1967-08-04 1969-10-15 Wildt Mellor Bromley Ltd Improved Patterning Mechanism for Circular Knitting Machines
US3499300A (en) * 1966-07-01 1970-03-10 Elitex Zavody Textilniho Pattern device for circular knitting machines
GB1199662A (en) * 1968-02-10 1970-07-22 Elitex Zavody Textilniho Electromagnetic Jack Selection Device for Lifting Needles in Circular Knitting Machines

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2412248A (en) * 1944-10-12 1946-12-10 Scott & Williams Inc Knitting method and machine
DE1065126B (de) * 1955-05-23 1959-09-10 Carl Merz K G Maschf Mustervorrichtung fuer Rundstrickmaschinen, insbesondere Doppelzylinder-Rundstrickmaschinen
US3046760A (en) * 1955-06-27 1962-07-31 Bentley Eng Co Ltd Circular knitting machine
US3063269A (en) * 1959-08-01 1962-11-13 Sdruzeni Podniku Textilniho St Circular knitting machine having a patterning device
GB987137A (en) * 1961-08-10 1965-03-24 Sdruzeni Podniku Textilniho St Double-cylinder knitting machine
US3283541A (en) * 1963-02-14 1966-11-08 Dubied & Cie Sa E Method and device for the individual control of selecting members
US3499300A (en) * 1966-07-01 1970-03-10 Elitex Zavody Textilniho Pattern device for circular knitting machines
GB1167418A (en) * 1967-08-04 1969-10-15 Wildt Mellor Bromley Ltd Improved Patterning Mechanism for Circular Knitting Machines
GB1199662A (en) * 1968-02-10 1970-07-22 Elitex Zavody Textilniho Electromagnetic Jack Selection Device for Lifting Needles in Circular Knitting Machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439313A (en) * 1980-12-05 1984-03-27 The Lummus Company Removal of arsenic impurity from hydrocarbons

Also Published As

Publication number Publication date
DE2226765A1 (de) 1972-12-21
IT956343B (it) 1973-10-10
GB1377403A (en) 1974-12-18
CS162084B1 (fr) 1975-07-15
FR2142531A5 (fr) 1973-01-26

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