EP0402034A1 - Double-knit circular knitting machine - Google Patents
Double-knit circular knitting machine Download PDFInfo
- Publication number
- EP0402034A1 EP0402034A1 EP90305898A EP90305898A EP0402034A1 EP 0402034 A1 EP0402034 A1 EP 0402034A1 EP 90305898 A EP90305898 A EP 90305898A EP 90305898 A EP90305898 A EP 90305898A EP 0402034 A1 EP0402034 A1 EP 0402034A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- needles
- sinkers
- cylinder
- sinker
- dial
- 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.)
- Granted
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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
- D04B15/06—Sinkers
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B9/00—Circular knitting machines with independently-movable needles
- D04B9/06—Circular knitting machines with independently-movable needles with needle cylinder and dial for ribbed goods
Definitions
- This invention relates generally to a method of knitting a double-knit fabric and a circular knitting machine for carrying out this method wherein the vertical length of travel of the cylinder needles is reduced by lowering the stitch forming ledge of the sinkers as the needles are being raised to clearing level and raising the stitch forming ledge of the sinkers as the needles are being drawn downwardly to stitch drawing level, and more particularly, to such a method and machine wherein the sinkers are supported for inward and outward movement between the dial and cylinder needles along a downwardly inclined path of travel and with the sinkers being moved outwardly and upwardly as the needles are drawn downwardly to raise the level of the stitch drawing ledge during stitch loop formation and with the sinkers being moved inwardly and downwardly as the needles are raised so that the shed stitch loops are moved inwardly and downwardly by the nebs of the sinkers.
- a newly formed loop slides downward on the needle stem and provides the various pattern structures desired.
- a pattern structured fabric such as a rib knit structure
- any yarn breakage during knitting typically results in the knit fabric dropping from the machine.
- the yarn from the cup end of the dropped fabric must be threaded onto at least every two or three needles and then restored to its initial state before dropping. This mandates an operator's slowly running the knitting machine to assure proper threading.
- a double-knit circular knitting machine includes a plurality of cylinder needles supported in a rotating needle cylinder for vertical movement parallel to the axis of rotation of the needle cylinder.
- Dial needles are radially slidable on a sinker dial and are operative with the cylinder needles.
- Sinkers are supported for inward and outward movement between the cylinder needles.
- Each sinker includes a stitch drawing ledge and a neb on the inner end portion of each of the sinkers. The sinkers cooperate with adjacent needles in the formation of knit stitch loops.
- the outer end portions of the sinkers are supported on a rotatable ring located exteriorly of the needle cylinder for movement in a radial direction and along a downwardly inclined path of travel between the needles.
- the inner end portions of the sinkers are supported on a sinker nose ring for movement along the downwardly inclined path of travel.
- Yarn is fed to the needles when the cylinder needles are in a raised, clearing position and when the dial needles are in an outward advanced position.
- the cylinder needles are successively moved downwardly while the dial needles are successively moved inwardly.
- the sinkers are simultaneously moved in an outwardly and upwardly direction along the downwardly inclined path of travel while the cylinder needles are being lowered and the dial needles are being retracted so that the stitch drawing ledge engages the yarn.
- the stitch drawing ledge cooperates with the associated adjacent needles to form stitch loops of a length determined by the amount of upward vertical movement imparted to the stitch forming ledge and the amount of downward and inward movement of the cylinder and dial needles.
- the cylinder needles are successively moved upwardly and the dial needles are successively moved outwardly after forming the stitch loops therewith.
- the sinkers are simultaneously moved in an inwardly and downwardly direction along the downwardly inclined path of travel to engage sinker nebs with the fabric and move the same inwardly and downwardly to aid in shedding the stitch loops from the cylinder and dial needles as they are respectively raised and advanced with the newly formed stitch loop thereon.
- a rotating needle cylinder 1 is supported on a driven ring gear 6 and the outside surface of the needle cylinder 1 is provided with the usual needle slots 1a in which cylinder needles, broadly indicated at 2 , are supported for vertical movement parallel to the axis of rotation of the needle cylinder 1 .
- hooked latch needles are preferred.
- Each knitting needle 2 is provided with a hook 2a and a pivoted latch 2b ( Figure 4), and an operating butt, as indicated at 2c ( Figure 1).
- Conventional knitting cams, including stitch cam means supported on cam plates 9 are provided for imparting vertical movement to the knitting needles 2 .
- the cam plates 9 are supported on the inner surface of the cam holder ring 8 which is fixed on a cam ring plate 10 .
- a rotating dial 4 is supported on a needle dial hub 7 .
- the outer surface of the dial 4 is spaced from and extends over an upper portion 1b of the rotating needle cylinder and is rotatable therewith.
- the top surface of the dial 4 is provided with the usual needle slots in which hooked latch dial needles, broadly indicated at 3 , are supported for radial movement in conjunction with cylinder needles 2 during knitting operation.
- Each dial needle 3 is provided with a needle hook 3a and latch 3b ( Figure 4), and an operating butt 3c ( Figure 1).
- Knitting cams, including stitch cam means supported on sinker cam plate 12 are provided for imparting radial, horizontal movement to the knitting needles 3 .
- the dial cam plate 12 is supported on the lower surface of a dial cam holder ring 11 which is fixed to a dial cam ring plate 13 .
- the upper surface of the needle cylinder includes the downwardly and inwardly inclined surface 1b which defines a sinker nose support ring for the nose of the sinkers as will be described herein.
- a sinker support bed 14 is fixed to the exterior of the upper end of the needle cylinder 1 and is provided with a downwardly and inwardly inclined sinker sliding surface 14a defined by the lower ends of sinker slots formed in the sinker bed 14 and at the same downwardly inclined angle as the sinker sliding surface 1b of the sinker nose ring defined on the upper surface of the needle cylinder 1 .
- the inclined surface 1b and the sliding surface 14a collectively define sinker support ring means of inverted truncated conical shape. As illustrated, the sinker sliding surface 14a is located at a lower level than the sinker sliding surface 1b .
- sinkers broadly indicated at 15 , cooperate with the cylinder and dial needles 2 , 3 to form stitch loops and are supported for movement in a radial direction and along a downwardly and inwardly inclined path of travel between the cylinder needles 2 .
- Sinker cap 16 is in turn supported on a sinker cap ring 18 which is supported in spaced-apart locations on the upper ends of support standards 19 surrounding the needle cylinder 1 .
- the sinker cams 17 are supported in a downwardly inclined position at the same downwardly inclined angle as the inclined sliding surfaces 1b and 14a on the respective inclined cylinder surface and sinker bed 14 .
- the sinker sliding surfaces 1b and 14a are illustrated in Figure 1 as being downwardly and inwardly inclined at an angle of around 20° relative to a line perpendicular to the vertically disposed cylinder needles 2 . While this 20° downwardly inclined angle is preferred, the present invention is not limited to this particular angular inclination, but may be positioned at an angle from 10° to 45°, and preferably within the range of 15° to 30°.
- the outer portion of the special sinker 15 includes an elongate body portion having an outer lower planar sliding edge 15e adapted to rest upon and slide along the inclined surface 14a of the sinker bed 14 .
- the sinker 15 also includes an inner lower planar sliding edge 15b adapted to rest on and be slidably supported along the inclined sliding surface 1b on the upper surface of the cylinder 1 .
- the inner sliding edge 15b is disposed at a higher level than the outer sliding edge 15e , as clearly shown in Figure 2.
- a stitch drawing ledge 15a is provided on the upper inner portion of the sinker and a neb 15d extends over the outer portion of the stitch drawing ledge 15a and defines a sinker throat 15c between the neb 15d and the outer portion of the stitch drawing ledge 15a .
- An upstanding operating butt 15f is provided on the outer and upper end portion of the elongated body portion of the sinker 15 . The butt 15f extends upwardly at a right angle from the body portion of the sinker 15 and is adapted to be engaged by the sinker cams 17 to impart the required inward and outward radial movement to the sinkers 15 .
- the stitch drawing ledge extends along a line which is parallel with the lower planar sliding edge of the sinker.
- the present special type sinker is characterized by the stitch drawing ledge 15a being slanted downwardly toward the operating butt 15f on the outer end portion of the elongate body portion of sinker 15 .
- the downwardly inclined or outwardly slanting stitch drawing ledge 15a of the sinker 15 of the present invention is different from the normal type sinker in which the stitch drawing ledge extends parallel to the lower planar sliding edge of the sinker.
- the present sinker is also different from the special sinkers of the type disclosed in U.S. patent numbers 3,837,185 and 3,986,371 wherein the stitch drawing ledge slants downwardly or inwardly in the direction of the inner end of the sinker.
- the solid line 50 indicates the path of travel of the top of the hook of the cylinder needles 2 during a knitting cycle while the dash-dot line 52 indicates the path of travel of the stitch drawing ledge 15a during a knitting cycle.
- the dotted line 51 indicates the path of travel of the dial needle 3 .
- the alternate long and double-dashed line 53 indicates the path of travel of the sinker throat 15c .
- a yarn feed carrier and finger 20 ( Figures 1 and 8) is positioned to feed a yarn indicated at 54 ( Figure 8) to the needles as they are moved to a stitch forming level.
- the needles 2,3 are successively raised as they approach the knitting station and are moved outwardly to the clearing level along the solid line 50 in Figure 3 to a position where the previously formed loops surrounding the shanks of the cylinder and dial needles 2,3 are positioned beyond the tip of the latches 2b, 3b , as shown in Figures 4-6.
- the sinkers 15 are moved and retained in an inwardly and downwardly inclined position along the downwardly inclined path of travel between the needles 2,3 so that the fabric is moved inwardly by the neb 15d to maintain the previously formed stitch loops below the tip of the latches 2b, 3b and in tight engagement with the shanks of the needles, as shown in Figure 6.
- both the outer and inner portions of the sinkers 15 are being supported.
- the lower planar sliding edge 15b on the inner end or nose of the sinker 15 is slidably supported on the downwardly and inwardly inclined surface 1b of the cylinder 1 .
- Lower planar sliding edge 15e on the outer end portion of the sinker 15 is slidably supported 14a of the sinker bed 14 ( Figure 1).
- both the inner and outer portions of the sinkers 15 are supported as the needles are drawn down to stitch forming level.
- the cylinder needle 2 begins to rise at the point where the dial needle 3 is retracted to the innermost position.
- the sinker moves in the inwardly and downwardly direction so that the previously formed stitch loops shed from the upper end of the needle hook 2a is engaged by the neb 15d and moved inwardly to aid in shedding the stitch loop from the needle.
- the sinker throat 15c pushes the knit fabric and assists the loop on the dial needle 3 to cast-off the stitch. This inward and downward movement of the sinkers 15 ensures that the needles 2 do not again pass upwardly through the shed stitch loop.
- the cylinder needle 2 continues to rise and the dial needle 3 begins its advance. This begins the start of the knitting cycle as illustrated in Figure 4.
- the inward and downward movement of the sinkers 15 ensures that the needles 2 do not again pass upwardly through the shed stitch loop.
- the sinkers 15 continue to move the fabric inwardly and downwardly as the needle 2 continues to rise, as shown in Figures 4 and 10, so that the newly formed stitch loop is maintained in engagement with the outer surface of the needle shank and imparts an opening motion to the latches of the needles.
- This knitting cycle is repeated at each of the subsequent knitting stations around the needle cylinder to form the knit fabric.
- a compound or sliding latch needle with a modified cam also can be used in accordance with the present invention.
- a jacquard apparatus for patterning which can include a pattern wheel, a pattern drug, or other electronic patterning device also can be included for knitting various artistic patterns.
- FIG. 11 illustrates a second embodiment of the special type of sinker used in accordance with the present invention.
- the sinker grooves in the machine can be modified as needed.
- the forward end of the sinker 150 includes a stitch drawing ledge 150a extending horizontally.
- Inclined surface 150b is in a plane defined by the inclined surface 150e so that the entire lower edge of the sinker defined by both surfaces 150b, 150e are guided by sinker grooves.
- Sinker 150 includes a throat 150c and a neb 150d .
- a control butt 150f is included.
- sinkers 15 offer several benefits. If a knit fabric drops on account of yarn breakage during knitting, the machine can be threaded in a similar manner as a single-knit circular knitting machine. Additionally, a thick fabric can be knitted. The inwardly and downwardly inclined direction of the sinker provides a gap between the tip of the sinker knitting ledge 15a and the needles 2, 3 . Therefore, a knitted fabric can pass between the gap. Thus, the winding tension is more readily applied to the knit fabric which results in the potential for higher quality and a larger knit fabric thickness.
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- Textile Engineering (AREA)
- Knitting Machines (AREA)
Abstract
Description
- This invention relates generally to a method of knitting a double-knit fabric and a circular knitting machine for carrying out this method wherein the vertical length of travel of the cylinder needles is reduced by lowering the stitch forming ledge of the sinkers as the needles are being raised to clearing level and raising the stitch forming ledge of the sinkers as the needles are being drawn downwardly to stitch drawing level, and more particularly, to such a method and machine wherein the sinkers are supported for inward and outward movement between the dial and cylinder needles along a downwardly inclined path of travel and with the sinkers being moved outwardly and upwardly as the needles are drawn downwardly to raise the level of the stitch drawing ledge during stitch loop formation and with the sinkers being moved inwardly and downwardly as the needles are raised so that the shed stitch loops are moved inwardly and downwardly by the nebs of the sinkers.
- During movement of the cylinder and dial needles in a conventional double-knit circular knitting machine, a newly formed loop slides downward on the needle stem and provides the various pattern structures desired. When forming a pattern structured fabric, such as a rib knit structure, any yarn breakage during knitting typically results in the knit fabric dropping from the machine. When dropping occurs, the yarn from the cup end of the dropped fabric must be threaded onto at least every two or three needles and then restored to its initial state before dropping. This mandates an operator's slowly running the knitting machine to assure proper threading.
- In Japanese patent publication SHO 63-42186, a double-knit circular knitting machine is disclosed which solves some of the aforementioned problems by the application and use of a novel sinker. However, as disclosed in this Japanese publication, the distance between the foremost end of the sinker and the rotating dial is shortened when the sinker advances to the inner side of the machine. As a result, a thick fabric cannot be knitted unless the dial is upwardly moved for increasing the separation distance so as to allow a knitted fabric to easily pass through the formed gap without interference. Because the sinker is arranged perpendicularly to the knitting needle, the sidewall of the sinker rest ring is small, thus creating an unstable sinker movement.
- With the foregoing in mind, it is an object of the present invention to provide a method of knitting a double-knit fabric on a circular knitting machine which overcomes the aforementioned deficiencies of the prior art.
- It is still another object of this invention to provide a double-knit circular knitting machine used for practicing the aforementioned method which overcomes the deficiencies of the prior art.
- In accordance with the present invention, a double-knit circular knitting machine includes a plurality of cylinder needles supported in a rotating needle cylinder for vertical movement parallel to the axis of rotation of the needle cylinder. Dial needles are radially slidable on a sinker dial and are operative with the cylinder needles. Sinkers are supported for inward and outward movement between the cylinder needles. Each sinker includes a stitch drawing ledge and a neb on the inner end portion of each of the sinkers. The sinkers cooperate with adjacent needles in the formation of knit stitch loops. The outer end portions of the sinkers are supported on a rotatable ring located exteriorly of the needle cylinder for movement in a radial direction and along a downwardly inclined path of travel between the needles. The inner end portions of the sinkers are supported on a sinker nose ring for movement along the downwardly inclined path of travel.
- Yarn is fed to the needles when the cylinder needles are in a raised, clearing position and when the dial needles are in an outward advanced position. The cylinder needles are successively moved downwardly while the dial needles are successively moved inwardly. The sinkers are simultaneously moved in an outwardly and upwardly direction along the downwardly inclined path of travel while the cylinder needles are being lowered and the dial needles are being retracted so that the stitch drawing ledge engages the yarn. The stitch drawing ledge cooperates with the associated adjacent needles to form stitch loops of a length determined by the amount of upward vertical movement imparted to the stitch forming ledge and the amount of downward and inward movement of the cylinder and dial needles.
- The cylinder needles are successively moved upwardly and the dial needles are successively moved outwardly after forming the stitch loops therewith. The sinkers are simultaneously moved in an inwardly and downwardly direction along the downwardly inclined path of travel to engage sinker nebs with the fabric and move the same inwardly and downwardly to aid in shedding the stitch loops from the cylinder and dial needles as they are respectively raised and advanced with the newly formed stitch loop thereon.
- In order that the present invention may be more readily understood, reference will now be made to the accompanying drawings, in which:-
- Figure 1 is a vertical sectional view through the needle cylinder of the knitting machine and illustrating the manner in which the sinkers are mounted for radial sliding movement along a downwardly inclined path of travel relative to the needles;
- Figure 2 is a side elevational view of one of the special type of sinkers utilized in the present invention;
- Figure 3 is a somewhat schematic developed elevational view showing the paths of travel of the needles and associated sinkers at one yarn feeding position;
- Figures 4 through 10 are side elevations of the upper portions of the cylinder and dial needles and associated sinkers showing their relationship during the successive steps of forming stitch loops and then shedding the previously formed stitch loops from the dial and cylinder needles, and being taken along their respective section lines 4-4 through 10-10 of Figure 3; and
- Figure 11 is a side elevational view of a second embodiment of the special type of sinker used in the present invention.
- As shown in Figure 1, a rotating
needle cylinder 1 is supported on a drivenring gear 6 and the outside surface of theneedle cylinder 1 is provided with the usual needle slots 1a in which cylinder needles, broadly indicated at 2, are supported for vertical movement parallel to the axis of rotation of theneedle cylinder 1. As illustrated, hooked latch needles are preferred. Each knittingneedle 2 is provided with a hook 2a and apivoted latch 2b (Figure 4), and an operating butt, as indicated at 2c (Figure 1). Conventional knitting cams, including stitch cam means supported oncam plates 9, are provided for imparting vertical movement to the knittingneedles 2. Thecam plates 9 are supported on the inner surface of thecam holder ring 8 which is fixed on acam ring plate 10. - A rotating
dial 4 is supported on aneedle dial hub 7. The outer surface of thedial 4 is spaced from and extends over anupper portion 1b of the rotating needle cylinder and is rotatable therewith. The top surface of thedial 4 is provided with the usual needle slots in which hooked latch dial needles, broadly indicated at 3, are supported for radial movement in conjunction withcylinder needles 2 during knitting operation. Eachdial needle 3 is provided with aneedle hook 3a andlatch 3b (Figure 4), and anoperating butt 3c (Figure 1). Knitting cams, including stitch cam means supported onsinker cam plate 12, are provided for imparting radial, horizontal movement to the knittingneedles 3. Thedial cam plate 12 is supported on the lower surface of a dial cam holder ring 11 which is fixed to a dial cam ring plate 13. - The upper surface of the needle cylinder includes the downwardly and inwardly
inclined surface 1b which defines a sinker nose support ring for the nose of the sinkers as will be described herein. A sinker support bed 14 is fixed to the exterior of the upper end of theneedle cylinder 1 and is provided with a downwardly and inwardly inclined sinker sliding surface 14a defined by the lower ends of sinker slots formed in the sinker bed 14 and at the same downwardly inclined angle as thesinker sliding surface 1b of the sinker nose ring defined on the upper surface of theneedle cylinder 1. Theinclined surface 1b and the sliding surface 14a collectively define sinker support ring means of inverted truncated conical shape. As illustrated, the sinker sliding surface 14a is located at a lower level than thesinker sliding surface 1b. - Special types of sinkers, broadly indicated at 15, cooperate with the cylinder and
dial needles cylinder needles 2. Inward and outward radial sliding movement of thesinkers 15, along the downwardly and inwardly inclined path of travel, is controlled by sinker cams 17 supported in a fixed position on asinker cap 16. Sinkercap 16 is in turn supported on asinker cap ring 18 which is supported in spaced-apart locations on the upper ends ofsupport standards 19 surrounding theneedle cylinder 1. As will be noted, the sinker cams 17 are supported in a downwardly inclined position at the same downwardly inclined angle as the inclinedsliding surfaces 1b and 14a on the respective inclined cylinder surface and sinker bed 14. Thesinker sliding surfaces 1b and 14a are illustrated in Figure 1 as being downwardly and inwardly inclined at an angle of around 20° relative to a line perpendicular to the vertically disposedcylinder needles 2. While this 20° downwardly inclined angle is preferred, the present invention is not limited to this particular angular inclination, but may be positioned at an angle from 10° to 45°, and preferably within the range of 15° to 30°. - As best shown in Figure 2, the outer portion of the
special sinker 15 includes an elongate body portion having an outer lower planar slidingedge 15e adapted to rest upon and slide along the inclined surface 14a of the sinker bed 14. Thesinker 15 also includes an inner lower planar slidingedge 15b adapted to rest on and be slidably supported along the inclined slidingsurface 1b on the upper surface of thecylinder 1. The inner slidingedge 15b is disposed at a higher level than the outersliding edge 15e, as clearly shown in Figure 2. A stitch drawing ledge 15a is provided on the upper inner portion of the sinker and aneb 15d extends over the outer portion of the stitch drawing ledge 15a and defines a sinker throat 15c between theneb 15d and the outer portion of the stitch drawing ledge 15a. Anupstanding operating butt 15f is provided on the outer and upper end portion of the elongated body portion of thesinker 15. Thebutt 15f extends upwardly at a right angle from the body portion of thesinker 15 and is adapted to be engaged by the sinker cams 17 to impart the required inward and outward radial movement to thesinkers 15. - In conventional sinkers, the stitch drawing ledge extends along a line which is parallel with the lower planar sliding edge of the sinker. In contrast to this conventional construction, the present special type sinker is characterized by the stitch drawing ledge 15a being slanted downwardly toward the
operating butt 15f on the outer end portion of the elongate body portion ofsinker 15. The downwardly inclined or outwardly slanting stitch drawing ledge 15a of thesinker 15 of the present invention is different from the normal type sinker in which the stitch drawing ledge extends parallel to the lower planar sliding edge of the sinker. The present sinker is also different from the special sinkers of the type disclosed in U.S. patent numbers 3,837,185 and 3,986,371 wherein the stitch drawing ledge slants downwardly or inwardly in the direction of the inner end of the sinker. - In Figure 3, the
solid line 50 indicates the path of travel of the top of the hook of thecylinder needles 2 during a knitting cycle while the dash-dot line 52 indicates the path of travel of the stitch drawing ledge 15a during a knitting cycle. The dotted line 51 indicates the path of travel of thedial needle 3. The alternate long and double-dashed line 53 indicates the path of travel of the sinker throat 15c. A yarn feed carrier and finger 20 (Figures 1 and 8) is positioned to feed a yarn indicated at 54 (Figure 8) to the needles as they are moved to a stitch forming level. - In the method according to the invention, the
needles solid line 50 in Figure 3 to a position where the previously formed loops surrounding the shanks of the cylinder anddial needles latches sinkers 15 are moved and retained in an inwardly and downwardly inclined position along the downwardly inclined path of travel between theneedles neb 15d to maintain the previously formed stitch loops below the tip of thelatches sinker 15 lowers the position of the stitch drawing ledge 15a below the normal horizontal path of travel, as indicated by the dash-dot line 52 in Figure 3, so that the cylinder needles 2 do not have to be raised as high to reach clearing level as would be the case if thesinkers 15 were maintained at a higher level. - While the cylinder needles 2 are in a raised latch clearing position, and the dial needles 3 are in a most outwardly advanced position,
yarn feed finger 20 feeds theyarn 54 to the hooks of theneedles dial needles 3 are retracted while thesinkers 15 begin to move outwardly and upwardly along the downwardly inclined path of travel, as illustrated in Figure 7. With further downward vertical movement of the cylinder needles 2 and further retraction of the dial needles 3, as indicated in Figure 8, the previously formed stitch loops close thelatches sinker 15 continues to move outwardly and upwardly so that the yarn in the cylinder needle hook 2a will be drawn downwardly over the stitch drawing ledge 15a while the stitch drawing ledge 15a remains in the highest level, as illustrated in Figure 9. - While the yarn is being drawn down over the stitch drawing ledge 15a, both the outer and inner portions of the
sinkers 15 are being supported. As shown in Figures 4-10, the lower planar slidingedge 15b on the inner end or nose of thesinker 15 is slidably supported on the downwardly and inwardlyinclined surface 1b of thecylinder 1. Lower planar slidingedge 15e on the outer end portion of thesinker 15 is slidably supported 14a of the sinker bed 14 (Figure 1). Thus, both the inner and outer portions of thesinkers 15 are supported as the needles are drawn down to stitch forming level. - As shown in Figure 10, the
cylinder needle 2 begins to rise at the point where thedial needle 3 is retracted to the innermost position. At this time, the sinker moves in the inwardly and downwardly direction so that the previously formed stitch loops shed from the upper end of the needle hook 2a is engaged by theneb 15d and moved inwardly to aid in shedding the stitch loop from the needle. The sinker throat 15c pushes the knit fabric and assists the loop on thedial needle 3 to cast-off the stitch. This inward and downward movement of thesinkers 15 ensures that theneedles 2 do not again pass upwardly through the shed stitch loop. Thecylinder needle 2 continues to rise and thedial needle 3 begins its advance. This begins the start of the knitting cycle as illustrated in Figure 4. - The inward and downward movement of the
sinkers 15 ensures that theneedles 2 do not again pass upwardly through the shed stitch loop. Thesinkers 15 continue to move the fabric inwardly and downwardly as theneedle 2 continues to rise, as shown in Figures 4 and 10, so that the newly formed stitch loop is maintained in engagement with the outer surface of the needle shank and imparts an opening motion to the latches of the needles. This knitting cycle is repeated at each of the subsequent knitting stations around the needle cylinder to form the knit fabric. - Alternatively, a compound or sliding latch needle with a modified cam also can be used in accordance with the present invention. A jacquard apparatus for patterning which can include a pattern wheel, a pattern drug, or other electronic patterning device also can be included for knitting various artistic patterns.
- The shape of the sinker is not limited. For example, Figure 11 illustrates a second embodiment of the special type of sinker used in accordance with the present invention. The sinker grooves in the machine can be modified as needed. The forward end of the
sinker 150 includes a stitch drawing ledge 150a extending horizontally.Inclined surface 150b is in a plane defined by theinclined surface 150e so that the entire lower edge of the sinker defined by bothsurfaces Sinker 150 includes athroat 150c and aneb 150d. Acontrol butt 150f is included. - The use of
sinkers 15 in accordance with the present invention offers several benefits. If a knit fabric drops on account of yarn breakage during knitting, the machine can be threaded in a similar manner as a single-knit circular knitting machine. Additionally, a thick fabric can be knitted. The inwardly and downwardly inclined direction of the sinker provides a gap between the tip of the sinker knitting ledge 15a and theneedles - In the drawings and specification there has been set forth the best mode presently contemplated for the practice of the present invention, and although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being defined in the claims.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1138017A JPH038840A (en) | 1989-05-31 | 1989-05-31 | Production of knit fabric and double knit circular knitting machine used therefor |
JP138017/89 | 1989-05-31 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0402034A1 true EP0402034A1 (en) | 1990-12-12 |
EP0402034B1 EP0402034B1 (en) | 1994-04-20 |
Family
ID=15212110
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90305898A Expired - Lifetime EP0402034B1 (en) | 1989-05-31 | 1990-05-31 | Double-knit circular knitting machine |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0402034B1 (en) |
JP (1) | JPH038840A (en) |
KR (1) | KR970005846B1 (en) |
DE (1) | DE69008239T2 (en) |
ES (1) | ES2053110T3 (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
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JPH0625387U (en) * | 1992-09-01 | 1994-04-05 | 太志 庄司 | Pile jack |
KR100777610B1 (en) * | 2004-02-10 | 2007-11-27 | 파이 룽 머시너리 밀 코포레이션 리미티드 | Improved Circular Knitting Machine |
KR100777604B1 (en) * | 2004-02-10 | 2007-11-27 | 파이 룽 머시너리 밀 코포레이션 리미티드 | Circular Knitting Machine |
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US925036A (en) * | 1906-06-30 | 1909-06-15 | Louis N D Williams | Web-holder for rib-knitting machines. |
FR671288A (en) * | 1928-04-17 | 1929-12-31 | Ribbed Knitting Circular Looms Improvements | |
GB1393352A (en) * | 1972-03-17 | 1975-05-07 | Elitex Zavody Textilniho | Knitting machines |
US3986371A (en) * | 1970-01-16 | 1976-10-19 | Elitex, Zavody Textilniho Strojirenstvi Generalni Reditalstvi | Method for forming loops in circular knitting machines |
DE2756411A1 (en) * | 1977-01-13 | 1978-07-20 | Roberto Zini | Hose knitted on circular knitting machines - by maintaining sinkers at elevated positions during zigzag yarn guidance to needles to reduce tension |
EP0351935A2 (en) * | 1988-07-20 | 1990-01-24 | Precision Fukuhara Works, Ltd | Circular knitting machine for knitting fabric |
-
1989
- 1989-05-31 JP JP1138017A patent/JPH038840A/en active Pending
-
1990
- 1990-03-22 KR KR1019900003891A patent/KR970005846B1/en not_active IP Right Cessation
- 1990-05-31 EP EP90305898A patent/EP0402034B1/en not_active Expired - Lifetime
- 1990-05-31 DE DE69008239T patent/DE69008239T2/en not_active Expired - Fee Related
- 1990-05-31 ES ES90305898T patent/ES2053110T3/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US925036A (en) * | 1906-06-30 | 1909-06-15 | Louis N D Williams | Web-holder for rib-knitting machines. |
FR671288A (en) * | 1928-04-17 | 1929-12-31 | Ribbed Knitting Circular Looms Improvements | |
US3986371A (en) * | 1970-01-16 | 1976-10-19 | Elitex, Zavody Textilniho Strojirenstvi Generalni Reditalstvi | Method for forming loops in circular knitting machines |
GB1393352A (en) * | 1972-03-17 | 1975-05-07 | Elitex Zavody Textilniho | Knitting machines |
DE2756411A1 (en) * | 1977-01-13 | 1978-07-20 | Roberto Zini | Hose knitted on circular knitting machines - by maintaining sinkers at elevated positions during zigzag yarn guidance to needles to reduce tension |
EP0351935A2 (en) * | 1988-07-20 | 1990-01-24 | Precision Fukuhara Works, Ltd | Circular knitting machine for knitting fabric |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG82515A1 (en) * | 1995-06-01 | 2001-08-21 | Jung Hao Hung | Sinker for a circular knitting machine |
CN100351447C (en) * | 2004-01-19 | 2007-11-28 | 佰龙机械厂股份有限公司 | Circular knitting machine structure |
CN100383305C (en) * | 2004-01-19 | 2008-04-23 | 佰龙机械厂股份有限公司 | Structure improved circular knitting machine |
CN100404743C (en) * | 2004-01-19 | 2008-07-23 | 佰龙机械厂股份有限公司 | Schenk sheet of circular knitting machine pile fabric |
EP1559818A1 (en) * | 2004-01-20 | 2005-08-03 | Pai Lung Machinery Mill Co. Ltd. | Circular knitting machine |
EP1559821A1 (en) * | 2004-01-22 | 2005-08-03 | Pai Lung Machinery Mill Co. Ltd. | Improved circular knitting machine |
CN102425029A (en) * | 2011-09-30 | 2012-04-25 | 洪荣豪 | Sinker abrasion-resistant device for weaving machine |
CN102425029B (en) * | 2011-09-30 | 2014-01-08 | 洪荣豪 | Sinker abrasion-resistant device for weaving machine |
CN110714252B (en) * | 2019-11-22 | 2024-05-14 | 浙江慧林智能设备有限公司 | High-integration electronic jacquard needle-selecting electromagnet |
Also Published As
Publication number | Publication date |
---|---|
KR970005846B1 (en) | 1997-04-21 |
JPH038840A (en) | 1991-01-16 |
ES2053110T3 (en) | 1994-07-16 |
DE69008239T2 (en) | 1994-11-10 |
KR900018443A (en) | 1990-12-21 |
DE69008239D1 (en) | 1994-05-26 |
EP0402034B1 (en) | 1994-04-20 |
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