EP0672769A1 - Flat bed knitting machine with movable yarn guide members - Google Patents
Flat bed knitting machine with movable yarn guide members Download PDFInfo
- Publication number
- EP0672769A1 EP0672769A1 EP95301744A EP95301744A EP0672769A1 EP 0672769 A1 EP0672769 A1 EP 0672769A1 EP 95301744 A EP95301744 A EP 95301744A EP 95301744 A EP95301744 A EP 95301744A EP 0672769 A1 EP0672769 A1 EP 0672769A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- needle
- knitting
- yarn
- yarn guide
- tip
- 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
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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
- D04B15/36—Cam systems or assemblies for operating knitting instruments for flat-bed knitting machines
- D04B15/362—Cam systems or assemblies for operating knitting instruments for flat-bed knitting machines with two needle beds in V-formation
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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
- D04B15/06—Sinkers
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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
- D04B15/10—Needle beds
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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
- D04B15/88—Take-up or draw-off devices for knitting products
- D04B15/90—Take-up or draw-off devices for knitting products for flat-bed knitting machines
Definitions
- the present invention relates to a flat-knitting machine, more particulaly, to a flat-knitting machine incorporating a plurality of movable yarn guide members respectively capable of guiding knitting yarns fed to tip portions of needle heads up to predetermined positions of knitting needles.
- the flat knitting machine disclosed in the above European Patent Publication incorporates a pair of needle heads which are respectively disposed in the front and rear alignment and respectively incorporates a projectable and retractable compound needle by permitting tip portions of respective needle heads to come close to each other.
- Swingable sinkers are respectively held at the tip portion of the approaching needle heads.
- Each movable sinker has a hook portion for pressing a sinker loop and a guide surface for guiding a knitting yarn fed to upper portion of the pressing hook up to a predetermined position of a knitting needle.
- Each sinker is arranged to swing itself by means of a cam unit of carriage.
- each movable sinker having guide surface for guiding a knitting yarn provided for the flat knitting machine described in the above Europearn Patent Publication is compulsorily driven for swinging, when sinker loops have different sizes for example, operator needs to adjust swingable amount of the movable sinker in correspondence with actual size of minimum loop.
- the Applicant of the present invention further proposed a flat-knitting machine having an energizing means for pressurizing sinker loops (provided for each sinker-loop pressing hook of each movable sinker) in the direction of pressing the sinker loops.
- the proposed mechanism was conceived to press sinker loops via substantially constant tension using elastic energizing force of the energizing means even when sinker loops have different sizes.
- the movable sinkers cannot swing themselves for a substantial amplitude in that pressing amount is preset in order that sinker loops cannot be cut off even when the sinker loops pressed by the sinker-loop pressing hook portion are quite small while the movable sinkers are compulsorily driven for swinging by carriages, and in that, since the guide surface is formed on the sinker-loop pressing hook portion, when each movable sinker on one of a pair of needle beds set in the front and back alignment with their tip portions being close to each other is subjected to swinging for a substantial amplitude, the swinging movable sinker interferes with a movable sinker on the other needle bed or the tip portion of the other needle bed, thus raising problem.
- the invention has thus been proposed to fully solve the above problems.
- the object of the invention is to provide an improved flat-knitting machine capable of correctly pressing sinker loops with optimum tension and guiding supplied knitting yarns into hooks.
- the improved flat-knitting machine incorporating movable yarn guide members comprises: at least a pair of needle beds disposed in front and rear alignment; a plurality of needle plates provided for each needle bed at equal intervals; wherein the at least pair of needle beds are disposed in front and rear alignment so that said tip portions of the needle plates are close to each other, a plurality of knitting needles aligned in parallel between the needle plated; wherein the knitting needles are compound needles in which sliders are projecting and retracing via a carriage, a plurality of movable sinkers each of which is swingably held at a position close to tip end of each needle plate and is provided with an elastically energizing member for generating energizing force by which a knitting yarn held in knitting-yarn pressing portion formed at tip portion of each movable sinker is energized in the direction of pressing knitting yarn; characterized in that: each yarn guide member is provided between a needle plate and a knitting needle, wherein each yarn guide member is
- each needle plate is thinly formed, semispherical supporting recess is formed in thick lower half portion substantially at the middle of the thinly formed lateral surface thereof, a rotary support member of a movable sinker is engaged with the semispherical supporting recess, each yarn guiding member is slidably positioned at lateral portion of the rotary support member, and a knitting needle is stored in slit-like space formed below a needle plate spacer at the lower half portion of lateral surface of the needle plate.
- cam groove of a control cam is formed in order that each yarn guide member will not overrun the center line of teeth apertures of the needle beds provided in the front and rear alignment when the yarn guide members are driven to the farthest position.
- cam groove of a control cam is formed so that the tip of the yarn guide member retreats to a position free from causing interference with yarn supply aperture while yarn supply aperture of a yarn feeder passes therethrouth only when the yarn guide member is driven in the forward direction.
- the movable sinker is properly driven for swinging by a sinker-cam to cause sinker loops to be pressed against a sinker-loop pressing hook portion.
- yarn guide members and knitting needles are driven in the forward direction by a predetermined amount by cams of a carriage.
- tip portion of the slider is at a position without projecting itself from guide surface portion of the yarn guide members towards hook portion. Since each of supplied knitting yarns is securely delivered to the hook after being guided through the guide surface, the knitting yarns can proceed linearly without being caught by the slider used for closing hook of each knitting needle.
- the cam groove of the control cam is so formed that the yarn guide members can be prevented from overrunning the center line of teeth apertures of the needle beds disposed in the front and rear alignment when the guide members are driven to the farthest position, the front and rear needle beds can be shifted relatively without causing the yarn guide members of the front and rear needle beds to interfere with each other.
- each yarn guide member is so formed that it can retract itself while the proceeding yarn guide member passes through yarn supply aperture of a yarn feeder, the yarn supply aperture of the yarn feeder remains free from coming into contact with the yarn guide member.
- Fig. 1 is a lateral view representing schematic structure of fundamental components of the improved flat-knitting machine according to the invention, in which the reference numeral 1 designates an overall view of the improved flat-knitting machine.
- the improved flat knitting machine 1 incorporates a plurality of needle plates 3 shown in Fig. 2 which are respectively installed above corresponding needle beds 2 at equal intervals.
- a plurality of compound-needle type knitting needles 4 and yarn guide members 5 shown in Fig. 3 are installed in parallel between the needle plates 3 and 3 by way of individually capable of projecting and retracting themselves.
- the needle beds 2 are disposed in opposition from each other in the " ⁇ " shaped formation via lateral view as of the condition in which tip portions of the knitting needles 4 are close to each other.
- a plurality of movable sinkers 7 respectively being swingable by a carriage 6 are disposed at the tip portions of the needle beds 2.
- Space T is formed between tip ends of the needle plates 3 and 3 through which knitting needles 4 of the needle beds 2 and the yarn guide members 5 are projectively and retractably operated by the corresponding carriages 6.
- Fig. 4 schematically illustrates a cam group of a carriage 6 for projecting and retracting knitting needles 4 of a needle head 2 and swinging a plurality of movable sinkers 7.
- the reference numeral 8 shown in Fig. 4 designates a knitting cam, 9 a rear cam for controlling sinkers disposed in front of the knitting cam 8, 10 a front cam for controlling sinkers disposed in front of the rear cam 9, and the reference numeral 11 desisnates a control cam for projecting and retracting yarn guide members 5.
- the sinker-controlling front cam 10 consists of a cam profile 12 formed below a piece of plate.
- the sinker-controlling rear cam 9 comprises a pair of rotatable cams 13a and 13b disposed to the left and to the right of a piece of plate which forms a cam profile 13 on the bottom surface of the rear cam 9 and a connection rod 17 which causes either of the rotatable cams 13a and 13b of movable sinkers 13a and 13b to retract when the other cam 13a or 13b projects.
- a sliding cam 13c is provided between the rotatable cams 13a and 13b.
- the sinker-controlling front cam 10 and rear cam 9 are respectively secured to a bracket 14 projecting from the carriage 2 via bolts 15 and 16.
- the sliding cam 13c shifts itself to downstream side in the carriage moving direction as soon as it comes into contact with a contact portion 25b of a rear cam of a movable sinker.
- the rotatable cam 13a is forwardly operative, whereas the other cam 13b is backwardly operative.
- the knitting cam 8 comprises a needle-raising cam 19, a crown member 20 disposed in the center tip of the needle-raising cam 19, a pair of gradational members 21 and 21 which are slidably disposed along both sides of the crown member 20, and a control groove 23 formed between the needle-raising cam 19, the crown member 20, and the gradational members 21 and 21 to permit butts 22 of respective knitting needles 4 to pass therethrough.
- the butt 22 of individual knitting needle 4 is controlled by the knitting cam 8.
- the needle plates 3 are respectively secured to the upper surface of the needle bed 2.
- a hook 4a at the tip of each knitting needle 4 is slidably disposed between the needle plates 3, 3, 3 ⁇ so that the hook 4a can externally project from the tip of the needle bed 2 and retract itself.
- individual butt 24a of a slider 24 is operated by a slider control cam (not shown) in association with projecting and retracting movements of each knitting needle 4, the slider 24 opens and closes the hook 4a.
- a plurality of ship-shaped (plane view) blades are provided on a side of respective knitting needles 4 in order to expand loops.
- a plurality of needle-plate spacers 18 are respectively set above individual knitting needles 4 and yarn guide members 5 secured between the needle plates 3, 3, 3.
- the movable sinker 7 comprises a thinly formed sinker plate 25 having the front being bent by way of circular arc and a sinker-loop pressing hook portion 27 formed on the part of the tip of the sinker plate 25.
- Front-cam contact portion 25a permitting contact of the sinker-controlling front cam 10 therewith is formed slightly behind the sinker-loop pressing hook portion 27.
- a spring holder 30 is formed near the front-cam contact portion 25a in order to secure an end of a substantially U-shaped linear spring (elastically energizing member) 29 which downwardly presses to energize the sinker-loop pressing portion 27.
- a rotation support portion 31 is formed below the spring holder 30 of the sinker plate 25 by way of semicircularly projecting itself.
- Rear-cam contact portion 25b permitting contact of the rear cam 9 therewith is formed at the rear end of the sinker plate 25.
- Each of the needle plate spacers 18 is formed with a thinly formed steel sheet.
- Coupling recesses 46 coupled with respective rotary rods 45 held across the needle plates 3, 3, ⁇ are respectively formed in the rear end portion of the needle plate spacers 18.
- Central upper surface portion of each needle plate spacer 18 has such a shape analogous to the upper half portion of the needle plate 3 having a dovetailed coupling groove 37 to be described later on.
- each of the yarn guide members 5 has a guide surface 42 which is downwardly inclined in the oblique direction at the tip end of the main body 41 formed with a thinly formed narrow-width steel sheet.
- a slide guide member 40 accommodating a pair of grooves 43 formed in the upper and lower ranks for slidably being guided by the rotary rod 45 held across the needle plates 3, 3, ⁇ is formed at the rear end of the main body 41.
- Individual butt 44 is vertically set to the upper surface of the slide guide member 40, where each butt 44 is operated for projecting and retracting itself by the control cam 11 secured to the carriage 6.
- control cam 11 for causing each yarn guide member 5 to project and retract by operating the butt 44 incorporates a cam groove 48 for permitting the yarn guide member 5 to internally proceed and externally retreat at both ends and center portion thereof at intermediate height position of a cam plate 47.
- the rear-cam contact portion 25b of the movable sinker 7 is depressed by the movable cam 13a of the rear cam 9.
- the sinker plate 25 rotates counterclockwise in resistance against tension of the linear spring 29 by way of pivoting on the rotary member 31 coupled with the recess 33 to cause the sinker-loop pressing hook portion 27 at the tip portion of the sinker plate 25 to be positioned above the knitting needle 4A, thereby causing the movable cam 13a of the rear cam 9 to become no longer effective in acting on the rear cam contact portion 25b of the movable sinker 7.
- butt 44 of the movable yarn guide member 5 is retracted via cam groove 48 of the control cam 11, and as a result, tip end of the butt 44 becomes substantially flush with the tip end of the sinker plate 25 as shown in Fig. 8.
- each knitting yan is delivered to the knitting needle 4 from the yarn feeder 50 at position C and then led below sliding locus of the slider 24 via the pronely inclined guide surface 42 at the tip of the yarn guide member 5. Knitting yarn is then deleivered to the yarn feeding aperture 50a and then securely led to inner space of the hook 4a of the knitting needle 4 (see Fig. 10).
- the slightly descending slider 24 closes the hook 4a holding the supplied knitting yarn.
- the loop (the former one) mounted on the upper surface of the slider 24 is knocked over in ssuch a state in which both sides of the hook 4a are held between he lower portion of the guide surface 42 of the yarn guide member 5 and the upper portion of the guide surface 42 of the yarn gguide member 5 and the upper portion of the sinker-loop pressing hook portion 27 of the movable sinker 7.
- the above embodiment has solely introduced a linear spring as energizing means for depressing and energizing the sinker-loop pressing hook portion.
- a linear spring as energizing means for depressing and energizing the sinker-loop pressing hook portion.
- the invention it is of course possible for the invention to form the energizing means with a coil spring in place of the linear spring.
- each sinker loop is depressed by energizing force of an elastically energizing means at sink-loop pressing hook portion of the movable sinker.
- the energizing means bends in the direction of loosening tension of the sinker loop to prevent the sinker loop from being elongated or torn off.
- the yarn guide member and an operating knitting needle are driven forward by a predetermined amount by cams of the carriage.
- tip end of the slider remains without projecting itself towards the hook from the guide surface of the yarn guide member at the yarn feeding position at which the hook of the slider of the knitting needle remain open. Since the supplied knitting yarn is guided via guide surface and securely delivered to the hook, kitting yarn can be prevented from piercing tthe slider linearly proceeding to close the hook of the knitting needle or from being caught by the slider. In consequence, the improved flat knitting machine can securely form a beautiful knit having well-prepared loop length.
- the cam groove of the control cam is formed so that the yarn guide member proceeded to the maximum extent can be prevented from overrunning the center line of teeth apertures of the needle beds disposed in the front and rear alignment, the front and rear needle beds can make shift relative to each other without causing the yarn guide members of the front and rear needle beds to interfer with each other, and yet, satisfactory knit composition can be maintained without spoiling proper function of the yarn guide meember, thus providing additional advantage.
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- Textile Engineering (AREA)
- Knitting Machines (AREA)
Abstract
Description
- The present invention relates to a flat-knitting machine, more particulaly, to a flat-knitting machine incorporating a plurality of movable yarn guide members respectively capable of guiding knitting yarns fed to tip portions of needle heads up to predetermined positions of knitting needles.
- Applicant of the present invention previously proposed a flat knitting machine of analogous kind which was disclosed in the European Patent Publication No. 0 441 564 A2 (corresponding to European Application No. 91300874. 4).
- The flat knitting machine disclosed in the above European Patent Publication incorporates a pair of needle heads which are respectively disposed in the front and rear alignment and respectively incorporates a projectable and retractable compound needle by permitting tip portions of respective needle heads to come close to each other. Swingable sinkers are respectively held at the tip portion of the approaching needle heads. Each movable sinker has a hook portion for pressing a sinker loop and a guide surface for guiding a knitting yarn fed to upper portion of the pressing hook up to a predetermined position of a knitting needle. Each sinker is arranged to swing itself by means of a cam unit of carriage.
- Nevertheless, since each movable sinker having guide surface for guiding a knitting yarn provided for the flat knitting machine described in the above Europearn Patent Publication is compulsorily driven for swinging, when sinker loops have different sizes for example, operator needs to adjust swingable amount of the movable sinker in correspondence with actual size of minimum loop.
- To solve this problem, as was disclosed in the European Patent Publication No. 0 435 690 A2 (corresponding to European Application No. 90314390. 7), the Applicant of the present invention further proposed a flat-knitting machine having an energizing means for pressurizing sinker loops (provided for each sinker-loop pressing hook of each movable sinker) in the direction of pressing the sinker loops. The proposed mechanism was conceived to press sinker loops via substantially constant tension using elastic energizing force of the energizing means even when sinker loops have different sizes.
- Nevertheless, since swingable amount of each movable sinker is dependent on actual size and tension of corresponding sinker loop, when guide surface for guiding a knitting yarn is provided on the sinker-loop pressing hook portion, it causes the position of the guide surface of the movable sinker to become variable, thus resulting in the failure to optimally position the yarn guide surface.
- Furthermore, according to the flat-knitting machine described in the European Patent Publication No. 0 441 564 A2 (corresponding to European Applicaion No. 91300874. 4), the movable sinkers cannot swing themselves for a substantial amplitude in that pressing amount is preset in order that sinker loops cannot be cut off even when the sinker loops pressed by the sinker-loop pressing hook portion are quite small while the movable sinkers are compulsorily driven for swinging by carriages, and in that, since the guide surface is formed on the sinker-loop pressing hook portion, when each movable sinker on one of a pair of needle beds set in the front and back alignment with their tip portions being close to each other is subjected to swinging for a substantial amplitude, the swinging movable sinker interferes with a movable sinker on the other needle bed or the tip portion of the other needle bed, thus raising problem.
- The invention has thus been proposed to fully solve the above problems. The object of the invention is to provide an improved flat-knitting machine capable of correctly pressing sinker loops with optimum tension and guiding supplied knitting yarns into hooks.
- To achieve the above object, the improved flat-knitting machine incorporating movable yarn guide members comprises:
at least a pair of needle beds disposed in front and rear alignment;
a plurality of needle plates provided for each needle bed at equal intervals;
wherein the at least pair of needle beds are disposed in front and rear alignment so that said tip portions of the needle plates are close to each other,
a plurality of knitting needles aligned in parallel between the needle plated;
wherein the knitting needles are compound needles in which sliders are projecting and retracing via a carriage,
a plurality of movable sinkers each of which is swingably held at a position close to tip end of each needle plate and is provided with an elastically energizing member for generating energizing force by which a knitting yarn held in knitting-yarn pressing portion formed at tip portion of each movable sinker is energized in the direction of pressing knitting yarn; characterized in that:
each yarn guide member is provided between a needle plate and a knitting needle, wherein each yarn guide member is slidably disposed so that guide surface formed at the tip thereof can project and retract itself from the tip of each needle bed; and
an operating member is provided at rear-end portion of each yarn guide member and projecting and retracting by a control means secured to a carriage. - Further, upper half of lateral surface close to the tip of each needle plate is thinly formed, semispherical supporting recess is formed in thick lower half portion substantially at the middle of the thinly formed lateral surface thereof, a rotary support member of a movable sinker is engaged with the semispherical supporting recess, each yarn guiding member is slidably positioned at lateral portion of the rotary support member, and a knitting needle is stored in slit-like space formed below a needle plate spacer at the lower half portion of lateral surface of the needle plate.
- Furthermore, cam groove of a control cam is formed in order that each yarn guide member will not overrun the center line of teeth apertures of the needle beds provided in the front and rear alignment when the yarn guide members are driven to the farthest position.
- Furthermore, cam groove of a control cam is formed so that the tip of the yarn guide member retreats to a position free from causing interference with yarn supply aperture while yarn supply aperture of a yarn feeder passes therethrouth only when the yarn guide member is driven in the forward direction.
- According to the improved flat-knitting machine incorporating the inventive movable yarn guide members, whenever a carriage accompanied with a yarn feeder runs over a needle head, a movable sinker, a yarn guide member, and a knitting needle, are operated by cam units stored in the carriage.
- Concretely, the movable sinker is properly driven for swinging by a sinker-cam to cause sinker loops to be pressed against a sinker-loop pressing hook portion.
- When this condition is entered, availing of energizing force of an elastically energizing member set to movable-sinker swing support portion, knitting yarns held by a yarn pressing portion are energized in the yarn-pressing direction. When sinker loops have negligible size, or when tension of sinker loops abnormally rises in the course of effecting relative shift of the front and rear needle beds to shift meshes back and forth in order to form desired pattern or increase or decrease meshes, the elastically energizing member bends itself in the direction of loosening tension of sinker loops to prevent them from being elongated or cut off.
- Next, yarn guide members and knitting needles are driven in the forward direction by a predetermined amount by cams of a carriage. When laterally viewing yarn feeding position at which hook of slider of each knitting needle remains open, tip portion of the slider is at a position without projecting itself from guide surface portion of the yarn guide members towards hook portion. Since each of supplied knitting yarns is securely delivered to the hook after being guided through the guide surface, the knitting yarns can proceed linearly without being caught by the slider used for closing hook of each knitting needle.
- Since the cam groove of the control cam is so formed that the yarn guide members can be prevented from overrunning the center line of teeth apertures of the needle beds disposed in the front and rear alignment when the guide members are driven to the farthest position, the front and rear needle beds can be shifted relatively without causing the yarn guide members of the front and rear needle beds to interfere with each other.
- Furthermore, since the tip portion of each yarn guide member is so formed that it can retract itself while the proceeding yarn guide member passes through yarn supply aperture of a yarn feeder, the yarn supply aperture of the yarn feeder remains free from coming into contact with the yarn guide member.
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- Fig. 1 is a lateral view of fundamental components of the improved flat knitting machine according to the invention;
- Fig. 2 is a sectional view of disassembled components of the movable yarn guide member according to the invention;
- Fig. 3 is a lateral view of knitting needles conforming to compound needle;
- Fig. 4 is an expanded view of cam group of a carriage;
- Fig. 5 is an expanded view of a cam for controlling a movable sinker;
- Fig. 6 is a sectional view of knitting needle portion taken on line X-X shown in Fig. 8;
- Fig. 7 is a lateral view of knitting needle portion when a specific knitting needle is at position A shown in Fig. 4;
- Fig. 8 is a lateral view of kniting needle portion when a specific knitting needle is at position B shown in Fig. 4;
- Fig. 9 is a lateral view of knitting needle portion when a specific knitting needle is at position C shown in Fig. 4;
- Fig. 10 is a lateral view of knitting needle portion when a specific knitting needle is at position D shown in Fig. 4;
- Fig. 11 is a lateral view of knitting needle portion when a specific knitting needle is at position E shown in Fig. 4; and
- Fig. 12 is a lateral view of knitting needle portion when a specific knitting needle is at position F shown in Fig. 4.
- Referring now to the accompanying drawings, details of the improved flat-knitting machine incorporating the movable yarn guide members according to an embodiment of the invention are described below.
- Fig. 1 is a lateral view representing schematic structure of fundamental components of the improved flat-knitting machine according to the invention, in which the
reference numeral 1 designates an overall view of the improved flat-knitting machine. The improvedflat knitting machine 1 incorporates a plurality ofneedle plates 3 shown in Fig. 2 which are respectively installed abovecorresponding needle beds 2 at equal intervals. A plurality of compound-needletype knitting needles 4 andyarn guide members 5 shown in Fig. 3 are installed in parallel between theneedle plates needle beds 2 are disposed in opposition from each other in the "Λ" shaped formation via lateral view as of the condition in which tip portions of the knittingneedles 4 are close to each other. A plurality ofmovable sinkers 7 respectively being swingable by acarriage 6 are disposed at the tip portions of theneedle beds 2. - Space T is formed between tip ends of the
needle plates needles 4 of theneedle beds 2 and theyarn guide members 5 are projectively and retractably operated by thecorresponding carriages 6. - Fig. 4 schematically illustrates a cam group of a
carriage 6 for projecting and retracting knittingneedles 4 of aneedle head 2 and swinging a plurality ofmovable sinkers 7. The reference numeral 8 shown in Fig. 4 designates a knitting cam, 9 a rear cam for controlling sinkers disposed in front of the knitting cam 8, 10 a front cam for controlling sinkers disposed in front of therear cam 9, and thereference numeral 11 desisnates a control cam for projecting and retractingyarn guide members 5. - The sinker-controlling
front cam 10 consists of acam profile 12 formed below a piece of plate. As shown in Fig. 5, the sinker-controllingrear cam 9 comprises a pair ofrotatable cams cam profile 13 on the bottom surface of therear cam 9 and aconnection rod 17 which causes either of therotatable cams movable sinkers other cam rotatable cams front cam 10 andrear cam 9 are respectively secured to abracket 14 projecting from thecarriage 2 viabolts contact portion 25b of a rear cam of a movable sinker. Therotatable cam 13a is forwardly operative, whereas theother cam 13b is backwardly operative. - As shown in Fig. 4, the knitting cam 8 comprises a needle-raising
cam 19, acrown member 20 disposed in the center tip of the needle-raisingcam 19, a pair ofgradational members crown member 20, and acontrol groove 23 formed between the needle-raisingcam 19, thecrown member 20, and thegradational members butts 22 ofrespective knitting needles 4 to pass therethrough. - The
butt 22 ofindividual knitting needle 4 is controlled by the knitting cam 8. As shown in Fig. 3 and Fig. 6, theneedle plates 3 are respectively secured to the upper surface of theneedle bed 2. Ahook 4a at the tip of eachknitting needle 4 is slidably disposed between theneedle plates hook 4a can externally project from the tip of theneedle bed 2 and retract itself. Whenindividual butt 24a of aslider 24 is operated by a slider control cam (not shown) in association with projecting and retracting movements of eachknitting needle 4, theslider 24 opens and closes thehook 4a. A plurality of ship-shaped (plane view) blades are provided on a side ofrespective knitting needles 4 in order to expand loops. - A plurality of needle-
plate spacers 18 are respectively set aboveindividual knitting needles 4 andyarn guide members 5 secured between theneedle plates - As shown in Fig. 2, the
movable sinker 7 comprises a thinly formedsinker plate 25 having the front being bent by way of circular arc and a sinker-looppressing hook portion 27 formed on the part of the tip of thesinker plate 25. Front-cam contact portion 25a permitting contact of the sinker-controllingfront cam 10 therewith is formed slightly behind the sinker-looppressing hook portion 27. Aspring holder 30 is formed near the front-cam contact portion 25a in order to secure an end of a substantially U-shaped linear spring (elastically energizing member) 29 which downwardly presses to energize the sinker-loop pressing portion 27. - A
rotation support portion 31 is formed below thespring holder 30 of thesinker plate 25 by way of semicircularly projecting itself. Rear-cam contact portion 25b permitting contact of therear cam 9 therewith is formed at the rear end of thesinker plate 25. - Upper half portion of a lateral surface close to the tip of the
needle plate 3 attached with thesinker plate 25 is thinly formed by scraping off thick portion consisting of thesinker plate 25 and theyarn guide member 5.Semicircular recess 33 is formed in the lower half portion of the thick portion at the middle of the thinly formed portion. Thesemicircular recess 33 accommodates arotation support member 31 of thesinker plate 25. The remaining portions of thesinker plate 25 are accommodated between the thinly formed portion of theneedle plate 3 and theneedle plate spacers 18. Theyarn guide members 5 are accommodated between theneedle plate spacers 18 at the lower part of thesinker plate 25.Knitting needles 4 are slidably stored in the lower-half side portions of theneedle plate 3 below theneedle plate spacers 18. - Each of the
needle plate spacers 18 is formed with a thinly formed steel sheet. Coupling recesses 46 coupled with respectiverotary rods 45 held across theneedle plates needle plate spacers 18. Central upper surface portion of eachneedle plate spacer 18 has such a shape analogous to the upper half portion of theneedle plate 3 having a dovetailedcoupling groove 37 to be described later on. - As shown in Fig. 2, each of the
yarn guide members 5 has aguide surface 42 which is downwardly inclined in the oblique direction at the tip end of themain body 41 formed with a thinly formed narrow-width steel sheet. Aslide guide member 40 accommodating a pair ofgrooves 43 formed in the upper and lower ranks for slidably being guided by therotary rod 45 held across theneedle plates main body 41.Individual butt 44 is vertically set to the upper surface of theslide guide member 40, where eachbutt 44 is operated for projecting and retracting itself by thecontrol cam 11 secured to thecarriage 6. - As shown in Fig. 4, the
control cam 11 for causing eachyarn guide member 5 to project and retract by operating thebutt 44 incorporates acam groove 48 for permitting theyarn guide member 5 to internally proceed and externally retreat at both ends and center portion thereof at intermediate height position of acam plate 47. - When a
pressing plate 38 is inserted incoupling grooves 37 formed in respective upper surfaces of theneedle plates 3 and the needle-plate spacers 18, theneedle plate spacers 18 are fixed. Simultaneously, free-end portion 29a of thelinear spring 29 is depressed so that it can be energized by own tension under thepressing plate 38, thereby causing the sinker-looppressing hook portion 27 at the tip portion of thesinker plate 25 to be depressed and energized constantly. - Next, operation of the improved flat knitting machine incorporating the movable yarn guide members according to the invention is described below by way of exemplifying a
knitting needle 4A. - When the
carriage 6 shifts itself from the left to the right to fix aknitting needle 4A at position A shown in Fig. 4, as shown in Fig. 7, butts 22 are operated bygradational cams 21 to cause thehook 4a at the tip of theknitting needle 4A accompanying loop to retract to a position substantially corresponding to the tip of theneedle plate 3. - The rear-
cam contact portion 25b of themovable sinker 7 is depressed by themovable cam 13a of therear cam 9. On the other hand, thesinker plate 25 rotates counterclockwise in resistance against tension of thelinear spring 29 by way of pivoting on therotary member 31 coupled with therecess 33 to cause the sinker-looppressing hook portion 27 at the tip portion of thesinker plate 25 to be positioned above theknitting needle 4A, thereby causing themovable cam 13a of therear cam 9 to become no longer effective in acting on the rearcam contact portion 25b of themovable sinker 7. This in turn causes thesinker plate 25 to rotate clockwise by effect of tension of thelinear spring 29 to permit deleivery of knitting yarns between theknitting needles pressing hook portion 27, which then depresses the delivered knitting yarns to cause the knitting yarns between theknitting needles linear spring 29. - Next, when the
knitting needle 4A is shifted to position B shown in Fig. 4 from position A as thecarriage 6 shifts itself, butt 22 of theknitting needle 4A is pushed upward by theneedle raising cam 19 while maintaining condition in which knitting yarns between theknitting needles pressing hook portion 27, thereby causinghook 4a of theknitting needle 4A to significantly project itself from the tip of theneedle bed 2. When this condition is present, even though theknitting needle 4A significantly projects itself, sincebutt 24a of theslider 24 is slightly lifted by a slider control cam (not shown), thehook 4a of theknitting needle 4A is opened, thereby enabling loop held by thehook 4a to be lifted above theslider 24. Simultaneously, butt 44 of the movableyarn guide member 5 is retracted viacam groove 48 of thecontrol cam 11, and as a result, tip end of thebutt 44 becomes substantially flush with the tip end of thesinker plate 25 as shown in Fig. 8. - Even when tension of knitting yarns between the
knitting needles pressing hook portion 27 is intensified when the loop held by thehook 4a ascends above the retractedslider 24, in response to intensified tension, since the sinker-loop pressing portion 27 swings itself upward in order to absorb the intensified tension, the loop lifted above theslider 24 is prevented from exessively being elongated or torn off. - Next, when the
carriage 6 further shifts itself to the left to permit theknitting needle 4A to shift itself to position C shown in Fig. 4, while thebutt 44 of theyarn guide member 5 is retracted via thecam groove 48 of thecontrol cam 11, thebutt 22 of theknitting needle 4A is operated by thecrown cam 20 to enable theknitting needle 4A to descend itself. - While the above condition is present, since the
butt 24a of theslider 24 remains without totally descending itself, the loop lifted above theslider 24 at position B is retained above theslider 24. Simultaneously, as shown in Fig. 9, knitting yarns are delivered to thehook 4a fromyarn feeder 50 shifting in conjuction with thecarriage 6. While this condition is present, since thebutt 44 is retracted via thecam groove 48 of thecontrol cam 11,yarn feeding aperture 50a of theyarn feeder 50 can pass through theyarn guide member 5 without coming into contact with the tip end of theyarn guide member 5. - When the
carriage 6 further proceeds to the left to shift theknitting needle 4A to position D shown in Fig. 4, theknitting needle 4A descends furthemore. On the other hand, thebutt 44 is pushed forward via thecam groove 48 of thecontrol cam 11 to cause theyarn guide member 5 to project itself from the tip of theneedle head 2. - As a result of external projection of the
yarn guide member 5, each knitting yan is delivered to theknitting needle 4 from theyarn feeder 50 at position C and then led below sliding locus of theslider 24 via the pronelyinclined guide surface 42 at the tip of theyarn guide member 5. Knitting yarn is then deleivered to theyarn feeding aperture 50a and then securely led to inner space of thehook 4a of the knitting needle 4 (see Fig. 10). - When the
carriage 6 further proceeds to the left until theknitting needle 4A arrives at position E shown in Fig. 4, since thebutt 22 of theknitting needle 4A is sbstantially lowered by thegradational cam 21, the slightly descendingslider 24 closes thehook 4a holding the supplied knitting yarn. Next, as shown in Fig. 11, the loop (the former one) mounted on the upper surface of theslider 24 is knocked over in ssuch a state in which both sides of thehook 4a are held between he lower portion of theguide surface 42 of theyarn guide member 5 and the upper portion of theguide surface 42 of theyarn gguide member 5 and the upper portion of the sinker-looppressing hook portion 27 of themovable sinker 7. While this condition is present, although themovable sinker 7 is apt to be lifted by tenssion of knitting yarn, thefront cam 10 securely holds themovable sinker 7. Accordingly, as shown in Fig. 11, when theknitting needle 4A fully descends, mesh of the loop is formed. - When the
carriage 6 further proceeds to the left until theknitting needle 4A arrives at position F shown in Fig. 4, thebutt 22 of theknitting needle 4A is pushed to a position slightly above the bottom edge portion of thegradational cam 21, thereby causing thebutt 44 of theyarn guide member 5 to be provisionally lowered by thecam groove 48 of thecontrol cam 11 from the state E described above before eventually being released from thecam groove 48. In consequence, as shown in Fig. 12, tip portions of theyarn guide member 5, themovable sinker 7, and theknitting needle 4A, are at the substantially identical position. - In this way, operation for knitting a knit is executed by repeating the above proccesses. In order to form desired pattern or solid silhouette, while the knitting operation is underway with the flat-knitting machine incorporating a pair of
needle beds needle beds movable sinker 7 does not overrun the center line C of teeth aperture between the front andrear needle beds yarn guide member 5 projects itself by a maximum range, it does not overrun the center line C of the teeth aperture, and thus, when theneedle beds yarn guide member 5 and themovable sinker 7 on one side from interferring with tip ends of theyarn guide member 5 and themovable sinker 7 of the other side, both theyarn guide members 5 and themovable sinkers 7 are free from incurring damage. - The above embodiment has solely referred to provision of a pair of
needle beds - The above embodiment has solely introduced a linear spring as energizing means for depressing and energizing the sinker-loop pressing hook portion. However, it is of course possible for the invention to form the energizing means with a coil spring in place of the linear spring.
- As was fully described above, according to the improved flat knitting machine incorporating the inventive movable yarn guide members, each sinker loop is depressed by energizing force of an elastically energizing means at sink-loop pressing hook portion of the movable sinker. Even when sinker loop is quite small or tenion of the sinker loop is abnormally intensified while making a relative shift of the front and rear needle beds or the purpose of forming desired pattern or increasing or decreasing mesh and making arrangement to shift mesh in the forward dor backward ddiection, the energizing means bends in the direction of loosening tension of the sinker loop to prevent the sinker loop from being elongated or torn off. Relative to this arrangement, the yarn guide member and an operating knitting needle are driven forward by a predetermined amount by cams of the carriage. When laterally viewed, tip end of the slider remains without projecting itself towards the hook from the guide surface of the yarn guide member at the yarn feeding position at which the hook of the slider of the knitting needle remain open. Since the supplied knitting yarn is guided via guide surface and securely delivered to the hook, kitting yarn can be prevented from piercing tthe slider linearly proceeding to close the hook of the knitting needle or from being caught by the slider. In consequence, the improved flat knitting machine can securely form a beautiful knit having well-prepared loop length.
- Furthermore, upper half portion of a lateral surface close to tip portion of the needle plate is thinly formed. Semicircular recess is formed in the lower half portion of thick part at substanially the intermediate position of the thinly formed portion. Rotation support member of the sinker plate is held in he semicircular recess. Knitting needles are stored in layers in sslit-like space formed below the needle-plate spacers at lower half portion of a side of the needle plate. This arrangement provides advantage in that the sinker, the yarn guide member, and the knitting needles can be installed compactly in narrow space between respective needle plates.
- Furthermore, since the cam groove of the control cam is formed so that the yarn guide member proceeded to the maximum extent can be prevented from overrunning the center line of teeth apertures of the needle beds disposed in the front and rear alignment, the front and rear needle beds can make shift relative to each other without causing the yarn guide members of the front and rear needle beds to interfer with each other, and yet, satisfactory knit composition can be maintained without spoiling proper function of the yarn guide meember, thus providing additional advantage.
- Furthemore, when the yarn guide member is driven forward and passes by the yarn feeding aperture of the yarn feeder, tip of the yarn guide member proceeds and retreats without interferring with the yarn feeding aperture. As a result, the yarn feeding aperture is free from coming into contact with the yarn guide member, thus preventing unwanted damage otherwise caused by contact between the yarn guide member and the yarn feeding apertures of the yarn feeder from ocurrence to result in the greatly improved durability of the flat knitting machine.
Claims (4)
- A flat knitting machine incorporating movable yarn guide members comprising:
at least a pair of needle beds disposed in front and rear alignment;
a plurality of needle plates provided for each needle bed at equal intervals;
wherein the at least pair of needle beds are disposed in front and rear alignment so that said tip portions of the needle plates are close to each other,
a plurality of knitting needles aligned in parallel between the needle plated;
wherein the knitting needles are compound needles in which sliders are projecting and retracing via a carriage,
a plurality of movable sinkers each of which is swingably held at a position close to tip end of each needle plate and is provided with an elastically energizing member for generating energizing force by which a knitting yarn held in knitting-yarn pressing portion formed at tip portion of each movable sinker is energized in the direction of pressing knitting yarn; characterized in that:
each yarn guide member is provided between a needle plate and a knitting needle, wherein each yarn guide member is slidably disposed so that guide surface formed at the tip thereof can project and retract itself from the tip of each needle bed; and
an operating member is provided at rear-end portion of each yarn guide member and projecting and retracting by a control means secured to a carriage. - A flat knitting machine incorporating movable yarn guide members as claimed in claim 1, wherein
upper half of lateral surface close to the tip of each needle plate is thinly formed, semispherical supporting recess is formed in thick lower half portion substantially at the middle of the thinly formed lateral surface thereof, a rotary support member of a movable sinker is engaged with the semispherical supporting recess, each yarn guiding member is slidably positioned at lateral portion of the rotary support member, and a knitting needle is stored in slit-like space formed below a needle plate spacer at the lower half portion of lateral surface of the needle plate. - A flat knitting machine incorporating movable yarn guide members as claimed in claim 1 or 2, wherein
cam groove of a control cam is formed in order that each yarn guide member will not overrun the center line of teeth apertures of the needle beds provided in the front and rear alignment when the yarn guide members are driven to the farthest position. - A flat knitting machine incorporating movable yarn guide members as claimed in claim 1, 2 or 3, wherein
cam groove of a control cam is formed so that the tip of the yarn guide member retreats to a position free from causing interference with yarn supply aperture while yarn supply aperture of a yarn feeder passes therethrouth only when the yarn guide member is driven in the forward direction.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP04919694A JP3333304B2 (en) | 1994-03-18 | 1994-03-18 | Weft knitting machine with movable yarn guide member |
JP49196/94 | 1994-03-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0672769A1 true EP0672769A1 (en) | 1995-09-20 |
EP0672769B1 EP0672769B1 (en) | 1998-05-20 |
Family
ID=12824258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95301744A Expired - Lifetime EP0672769B1 (en) | 1994-03-18 | 1995-03-16 | Flat bed knitting machine with movable yarn guide members |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0672769B1 (en) |
JP (1) | JP3333304B2 (en) |
DE (1) | DE69502524T2 (en) |
TW (1) | TW297413U (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19806548A1 (en) * | 1998-02-17 | 1999-08-19 | Schieber Universal Maschf | Flatbed knitter with comb sinkers at the needle bed |
EP0937800A2 (en) * | 1998-02-24 | 1999-08-25 | H. Stoll GmbH & Co. | Method for manufacturing knitwear on a flat bed knitting machine |
US6014874A (en) * | 1996-05-15 | 2000-01-18 | Shima Seika Mfg., Ltd. | Yarn guide for weft knitting machine |
EP1467010A1 (en) * | 2003-04-11 | 2004-10-13 | H. Stoll GmbH & Co. | Flat knitting machine having at least two needle beds |
EP1522617A1 (en) * | 2003-10-07 | 2005-04-13 | H. Stoll GmbH & Co. | Flat knitting machine having at least one needle bed |
US7152435B2 (en) | 2003-07-30 | 2006-12-26 | Shima Seiki Manufacturing Limited | Weft knitting machine having movable sinker |
EP1942216A1 (en) * | 2005-09-28 | 2008-07-09 | Shima Seiki Manufacturing Limited | Weft knitting machine having movable yarn guide |
CN100503926C (en) * | 2004-03-31 | 2009-06-24 | 株式会社岛精机制作所 | Movable sinker device of weft knitting machine |
CN101778970B (en) * | 2007-07-30 | 2011-04-20 | 株式会社岛精机制作所 | Fabric knitting method, and weft knitting machine |
EP2570532A1 (en) * | 2011-09-16 | 2013-03-20 | Pai Lung Machinery Mill Co., Ltd. | Sinker control apparatus for flat knitting machines |
CN102995285A (en) * | 2011-09-13 | 2013-03-27 | 株式会社岛精机制作所 | Flatbed knitting machine provided with compound needle, and slider control method for flatbed knitting machine |
US20200270780A1 (en) * | 2019-02-27 | 2020-08-27 | Pai Lung Machinery Mill Co., Ltd. | Method for knitting three-dimensional fabric with variable thickness through a flat knitting machine |
US11313058B2 (en) * | 2019-02-27 | 2022-04-26 | Pai Lung Machinery Mill Co., Ltd. | Flat knitting machine structure with adjustable gap between two knock-over bits |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4519636B2 (en) * | 2004-12-28 | 2010-08-04 | 株式会社島精機製作所 | Flat knitting machine with movable sinker |
CN101490324B (en) * | 2006-08-11 | 2011-04-13 | 株式会社岛精机制作所 | Movable sinker and weft knitting machine |
CN102995274B (en) * | 2011-09-19 | 2014-09-24 | 佰龙机械厂股份有限公司 | Sinker control device for transverse knitter |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0435690A2 (en) * | 1989-12-28 | 1991-07-03 | SHIMA SEIKI MFG., Ltd. | Sinker mechanism for flat knitting machines |
EP0441564A2 (en) * | 1990-02-09 | 1991-08-14 | Shima Seiki Mfg., Ltd. | Movable sinker in flat knitting machine |
EP0578458A1 (en) * | 1992-07-09 | 1994-01-12 | Shima Seiki Mfg., Ltd. | Sinker mechanism for flat knitting machines |
-
1994
- 1994-03-18 JP JP04919694A patent/JP3333304B2/en not_active Expired - Fee Related
-
1995
- 1995-03-14 TW TW085203135U patent/TW297413U/en unknown
- 1995-03-16 EP EP95301744A patent/EP0672769B1/en not_active Expired - Lifetime
- 1995-03-16 DE DE69502524T patent/DE69502524T2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0435690A2 (en) * | 1989-12-28 | 1991-07-03 | SHIMA SEIKI MFG., Ltd. | Sinker mechanism for flat knitting machines |
EP0441564A2 (en) * | 1990-02-09 | 1991-08-14 | Shima Seiki Mfg., Ltd. | Movable sinker in flat knitting machine |
EP0578458A1 (en) * | 1992-07-09 | 1994-01-12 | Shima Seiki Mfg., Ltd. | Sinker mechanism for flat knitting machines |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6014874A (en) * | 1996-05-15 | 2000-01-18 | Shima Seika Mfg., Ltd. | Yarn guide for weft knitting machine |
DE19806548A1 (en) * | 1998-02-17 | 1999-08-19 | Schieber Universal Maschf | Flatbed knitter with comb sinkers at the needle bed |
EP0937800A2 (en) * | 1998-02-24 | 1999-08-25 | H. Stoll GmbH & Co. | Method for manufacturing knitwear on a flat bed knitting machine |
EP0937800B1 (en) * | 1998-02-24 | 2003-04-16 | H. Stoll GmbH & Co. | Method for manufacturing knitwear on a flat bed knitting machine |
CN100408741C (en) * | 2003-04-11 | 2008-08-06 | H.斯托尔股份有限公司 | Flat knitting machine having at least two needle beds |
EP1467010A1 (en) * | 2003-04-11 | 2004-10-13 | H. Stoll GmbH & Co. | Flat knitting machine having at least two needle beds |
US7152435B2 (en) | 2003-07-30 | 2006-12-26 | Shima Seiki Manufacturing Limited | Weft knitting machine having movable sinker |
EP1522617A1 (en) * | 2003-10-07 | 2005-04-13 | H. Stoll GmbH & Co. | Flat knitting machine having at least one needle bed |
CN100503926C (en) * | 2004-03-31 | 2009-06-24 | 株式会社岛精机制作所 | Movable sinker device of weft knitting machine |
EP1942216A4 (en) * | 2005-09-28 | 2012-08-15 | Shima Seiki Mfg | Weft knitting machine having movable yarn guide |
EP1942216A1 (en) * | 2005-09-28 | 2008-07-09 | Shima Seiki Manufacturing Limited | Weft knitting machine having movable yarn guide |
CN101778970B (en) * | 2007-07-30 | 2011-04-20 | 株式会社岛精机制作所 | Fabric knitting method, and weft knitting machine |
CN102995285A (en) * | 2011-09-13 | 2013-03-27 | 株式会社岛精机制作所 | Flatbed knitting machine provided with compound needle, and slider control method for flatbed knitting machine |
CN102995285B (en) * | 2011-09-13 | 2014-07-09 | 株式会社岛精机制作所 | Flatbed knitting machine provided with compound needle, and slider control method for flatbed knitting machine |
EP2570532A1 (en) * | 2011-09-16 | 2013-03-20 | Pai Lung Machinery Mill Co., Ltd. | Sinker control apparatus for flat knitting machines |
US20200270780A1 (en) * | 2019-02-27 | 2020-08-27 | Pai Lung Machinery Mill Co., Ltd. | Method for knitting three-dimensional fabric with variable thickness through a flat knitting machine |
US11313058B2 (en) * | 2019-02-27 | 2022-04-26 | Pai Lung Machinery Mill Co., Ltd. | Flat knitting machine structure with adjustable gap between two knock-over bits |
US11639566B2 (en) * | 2019-02-27 | 2023-05-02 | Pai Lung Machinery Mill Co., Ltd. | Method for knitting three-dimensional fabric with variable thickness through a flat knitting machine |
Also Published As
Publication number | Publication date |
---|---|
TW297413U (en) | 1997-02-01 |
JPH07258946A (en) | 1995-10-09 |
JP3333304B2 (en) | 2002-10-15 |
DE69502524T2 (en) | 1998-09-10 |
DE69502524D1 (en) | 1998-06-25 |
EP0672769B1 (en) | 1998-05-20 |
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