CA1291881C - Device for manufacturing knitted bags with a circular machine for tubularknitwear moving with continuous and unidirectional motion, and machine equipped with such a device - Google Patents
Device for manufacturing knitted bags with a circular machine for tubularknitwear moving with continuous and unidirectional motion, and machine equipped with such a deviceInfo
- Publication number
- CA1291881C CA1291881C CA000451705A CA451705A CA1291881C CA 1291881 C CA1291881 C CA 1291881C CA 000451705 A CA000451705 A CA 000451705A CA 451705 A CA451705 A CA 451705A CA 1291881 C CA1291881 C CA 1291881C
- Authority
- CA
- Canada
- Prior art keywords
- needles
- cam
- fall device
- motion
- cylinder
- 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.)
- Expired - Lifetime
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Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B9/00—Circular knitting machines with independently-movable needles
- D04B9/20—Circular knitting machines with independently-movable needles with provision for narrowing or widening; with reciprocatory action, e.g. for knitting of flat portions
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B9/00—Circular knitting machines with independently-movable needles
- D04B9/42—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration
- D04B9/46—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration stockings, or portions thereof
- D04B9/56—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration stockings, or portions thereof heel or toe portions
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
- Treatment Of Fiber Materials (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Knitting Of Fabric (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
Abstract
ABSTRACT
A fall device with a cam having two active contours, a countercam and a small pole are used to manufacture knitted bags by means of a circular machine for tubular knitwear moving with unidirectional motion. The machine is provided with an additional thread guide which rotates concentrically with the needles cylin-der so as to feed twice, once in motion and once at rest, needles required to form a knitted bag. The fall device rotates around the needles cylinder in such a way that, at every turn, it stops at a first position corresponding to a first area of stitch forma-tion in order to allow one contour of the cam to trigger, at rest, a first fall of needles in order to have a first partial row of stitches. Then, it accelerates up to a second position and from there it continues up to a third position at constant speed, but greater than the speed of the cylinder in order to pass said needles and to allow the small pole to raise them from a level where they are held back to a level where they are dropped. More-over, this allows the other contour of the cam to trigger, in motion, a second fall of the needles in order to form a second partial row of stitches. Finally, from the third position it begins to slow down until it reaches the initial position where, after a turn by 360°, it stops.
A fall device with a cam having two active contours, a countercam and a small pole are used to manufacture knitted bags by means of a circular machine for tubular knitwear moving with unidirectional motion. The machine is provided with an additional thread guide which rotates concentrically with the needles cylin-der so as to feed twice, once in motion and once at rest, needles required to form a knitted bag. The fall device rotates around the needles cylinder in such a way that, at every turn, it stops at a first position corresponding to a first area of stitch forma-tion in order to allow one contour of the cam to trigger, at rest, a first fall of needles in order to have a first partial row of stitches. Then, it accelerates up to a second position and from there it continues up to a third position at constant speed, but greater than the speed of the cylinder in order to pass said needles and to allow the small pole to raise them from a level where they are held back to a level where they are dropped. More-over, this allows the other contour of the cam to trigger, in motion, a second fall of the needles in order to form a second partial row of stitches. Finally, from the third position it begins to slow down until it reaches the initial position where, after a turn by 360°, it stops.
Description
Hl The present invention relates -to a device for manufacturing knitted bags by means of a circular machine for tubular knitwear that moves with continuous and unidirectional motion, as well as a circular machine equipped with such a device.
A procedure is available for manufacturing a knitted bag in a tubular knitwear by means of a circular knitting-machine moving with continuous circular motion. Such procedure consists in providing another continuous thread for the partial rows of stitches, such thread being carried by a guide rotating around the needles cylinder with non-uniform motion. At each turn, the thread guide is arrested in correspondence with the first position of stitch formation in order to feed the needles of an arc of needles passing in front of it. Then, after surpassing said needles until the second position of stitch formation is reached, it continues to move at a constant speed but greater than the speed of the needles cylinder. Finally, after a full turn, it stops in correspondence with the initial position.
It is also know that a device is available to feed thread from the additional thread guide employed for the forma~ion of the second partial row of stitches according to the procedure aforementioned. Such device allows the retention, under no tension, of a sufficient length of thread for the formation of the second partial row of stitches.
The main aim of the present invention is to propose another and different device implementing the aforesaid procedure.
1~18(~1 This novel device is simple and effective so that the resulting circular machine is highly reliable and versatile and of low cost.
According to the present invention, this result is obtained by adopting the idea of employing a fall device that makes use of a double contour cam, a countercam and a small pole.
The cam is external and concentric with the needles cylinder and engages the needles employed for the formation of partial rows of stitches. The device rotates with non-uniform motion in the same direction as the cylinder in such a way that, at each and every turn, it stops in a position where it leaves behind the additional thread guide. At this position, one of the two contours of the aforesaid cam triggers the first fall of said needles, which then form the first partial row of stitches. The device then accel-erates and passes the said needles remaining behind said additional thread guide. Then, the small pole causes said needles to rise from their held back level to the level where they are dropped. The second cam contour causes a second Eall of said needles, which then form a second partial row of stitches.
Finally, the cam slows down, reaching, after a full turn, the initial position, where it stops.
The advantages obtained by virtue of the present invention essentially consist of the possibility of having knitted bags oE different form, size and position, manufactured with continuous thread and unidirectional motion of the circular machine. Among various knitwear obtained in this way we might mention: socks with heel and pocket tip, briefs with front inner liner, stockings and panty hose with liner. One can also have knitwear from yarns of different colors, size and nature. Moreover, it is possible to make use of circular machines, with one or two needles cylinders and multiple feed, for manufacturing knitted tubes, and with two or multiples of two additional feeds for manufacturing knitted bags. Among other advantages of the invention one should mention that it is now possible to have printed fabric, since one can choose the needles for this purpose. Moreover, the manufacturing operation is highly reliable and safe even at speeds much greater than those of the present circular machines working with alterna-tive motion. The high quality of the products is by far superior than that of said alternative machines. Finally, the relative construction simplicity of the device allows to equip a knitwear circular machine with such device at competitive costs.
The invention is described in greater details as follows with the help of the attached drawings, which represent only one of the possible means of its implementation.
Figure 1 shows a cross section of the fall device in a rest position according to the invention;
Figure 2 shows the fall device at the rest of Figure 1 during the formation of the first partial row of stitches;
Figure 3 shows the device in motion in the course of forming the second partial row of stitches;
Figure 4 shows the sectors of a turn which are run at different speeds by the fall device and by the additional thread guide. At the center one finds the cam that controls the different speeds.
- 1~918~31 Figure 5 shows an axial vertical section of a knitwear circular machine equipped with a device according to the inven-tion;
Figure 6 shows a horizontal cross section of a detail of the timing device of the additional thread guide associated with the fall device according to the invention;
Figure 7 shows a horizontal cross section of a device for controlling the rotation of the fall device and of the addi-tional thread guide according to the invention;
Figure 8 shows a cross section of part of Figure 7;
Figure 9 shows a cross section of the remaining part of the device of Figure 7.
Referring to the attached drawing and in its essential elements the device for manufacturing knitted bags with continuous motion of a circular machine for tubular knitwear according to the invention includes: a fall device (200) concentric with and exter-nal to the needles cylinder (1), with a cam (201) having two active contours (211-212) designed to trigger two different falls of the needles, a countercam (202) below cam (201), and a small pole (203) coming before said cam (201) in the direction of rota-tion. The function of the small pole is that of raising the needles from a level where they are held back to a level where they are dropped. Said fall device, which is connected to the overhanging case (53) of the sinkers, rotates in one and the same direction as cylinder (1), with intermittent motion, in such a way that it stops at position (A) of Figure 4 corresponding to the first area of stitch formation. Contour (211) of cam (201) then lZ91~61 ,.. .
triggers the fall of needles (3) by a partial arc (for instance, 135) so as to form a first partial row of stitches. The fall device then accelerates up to position (B) of Figure 4 where the working speed is now greater (for instance, double) than that of the needles cylinder. From this position it continues its motion up to position (C) of Figure 4 with constant speed in order to pass the needles by said partial arc and to allow the small pole (203), in cooperation with contour (212) of cam (201), to raise and then to let fall said needles, thus forming a second partial row of stitches. Finally, the fall device slows down from posi-tion (C) until it reaches position (A) of Figure 4 where it stops.
Moreover, said fall device can be radially displaced, with known means, relative to the needles cylinder in order to change the distance, thus engaging in this way the needles for different partial arcs, depending on the type of knitted bag to be made (for instance, heel or tip with closure of the lower end of a sock cr stocking).
A circular machine for tubular knitwear equipped with the aforementioned device includes: an additional thread guide (98) radially positioned over cylinder (1) below platter (92).
Such thread guide is set into rotation by a hollow shaft ~97) going through the vertical shaft of platter (92). The hollow of said shaft (97) is used for the passage of the thread employed for manufacturing the knitted bag and for the passage of air sucked through the small opening (100) that assists said additional thread guide.
The rotation of the additional thread guide (98) takes ;IZ~881 .
place in the same direc-tion as cylinder (1) and with intermittent motion. At each and every turn, t~read guide (98) stops at posi-tion (A'), as shown in Figure 4, behind cam (201) of said fall device (200) in the course of the first thread feeding, then it quickly accelerates up to position (B'), as shown in Figure 4, and from there it continues up to position (C), as shown in Figure 4, with constant speed in order to supply sufficient yarn for the second feeding. Finally, from position (B) it begins to slow down until it stops at the initial position (A').
Moreover, it is known that said additional thread guide (98) can be radially displaced relative to cylinder (1). In this way, the thread guide hook protrudes, in operation, towards the external side of the head of the needles whereas, when it is not in operation, it is near said small opening (100).
It is quite obvious that other similar thread guides positioned one above the other, or side by side, can be associated to said additional thread guide (98) so as to allow multiple yarn feeing.
Several tongue needles (3) with double heel (130) dis-tributed along the partial arc of needles required for making aknitted bag, whose upper heel, at every turn of cylinder (1), is engaged by one (211) of the two contours of cam (201) for the first fall, and by the small pole (203) for the following rise of the needles from the position where they are held back to the position where they are dropped, and by the other contour (212) of cam (201) for the second fall.
Needles (3) belonging to different partial arcs, i.e.
1~918~1 those required to make different knitted bags of the same knit-wear, have upper heels of different length so that they can be selected by the fall device (200), previously positioned along corresponding distances from cylinder (1).
A wheelwork to obtain the unidirectional intermittent rotation, as previously described, of the fall device (200) simul-taneously with the rotation of cylinder (1), as well as of the additional thread guide (98). Such wheelwork consists of an epicyclic train with coincident axes, where the main wheels (221-225) are along axis (220), the satellite wheels (222-224) are along axis (223) and the gear carrier (226) has a wheel (227), which is controlled by a spring (246), in contact with the contour of cam (228) splined to the motor shaft (231). The movement obtained from cylinder carrier (229) through wheel (230) splined to shaft (231) is transmit-ted to the main wheel (221) by said epicyclic train through coupling (232) and wheels (233-234-234'), and from the main wheel (225) to transmission shaft (237) by means of wheels (235-235'-236-236'). From the transmission shaft the movement is transferred to the fall device (200) by means of wheel (238). Moreover, the movement is transmitted from said shaft (237) to shaft (97) of the additional thread guide (98) by means of an epicyclic train with coincident axes, the main wheels (239-241) being along axis (237), the satellite wheels (240-242) being along axis (243), and by means of the train carrier (245), of wheel (241') and of a geared belt (246).
Train carrier (226) of the first epicyclic train can move in both directions relative to a middle position for which 1~9188~
the transmission ratio of the wheelwork is determined by the number of gear teeth (such ratio is equal to one), whereas the ratio becomes positive or negative by displacing the train carrier in one direction or the other. Hence, at any one time the posi-tion of train carrier (226), which is controlled by the position of the small wheel (227) over cam (228), determines the speed at that time of the fall device (200) and of the additional thread guide (98). Likewise, train carrier (245) of the second epicyclic train, which has two possible working positions defined by the contact of a small wheel with a cam carried by shaft (23) (for simplicity, such small wheel is not shown in the figure), deter-mines the instantaneous position of the additional thread guide (in front or behind) relative to the fall device (200).
Instead of using an alternative forward and reverse motion of the train carrier (226) one obtains a unidirectional discontinuous motion by using a cam (228) with Archimedean spiral contour that engages, one at a time, several small wheels (227) of the train carrier (226).
In order to maintain the width of the knitted bags and to conserve the number of additional double feedings, the rotation of the needles cylinder will be carried out with variable rather than constant speed, slowing down and stopping the cylinder during the formation of the partial rows of stitches, when the fall device (200) is still in motion.
A procedure is available for manufacturing a knitted bag in a tubular knitwear by means of a circular knitting-machine moving with continuous circular motion. Such procedure consists in providing another continuous thread for the partial rows of stitches, such thread being carried by a guide rotating around the needles cylinder with non-uniform motion. At each turn, the thread guide is arrested in correspondence with the first position of stitch formation in order to feed the needles of an arc of needles passing in front of it. Then, after surpassing said needles until the second position of stitch formation is reached, it continues to move at a constant speed but greater than the speed of the needles cylinder. Finally, after a full turn, it stops in correspondence with the initial position.
It is also know that a device is available to feed thread from the additional thread guide employed for the forma~ion of the second partial row of stitches according to the procedure aforementioned. Such device allows the retention, under no tension, of a sufficient length of thread for the formation of the second partial row of stitches.
The main aim of the present invention is to propose another and different device implementing the aforesaid procedure.
1~18(~1 This novel device is simple and effective so that the resulting circular machine is highly reliable and versatile and of low cost.
According to the present invention, this result is obtained by adopting the idea of employing a fall device that makes use of a double contour cam, a countercam and a small pole.
The cam is external and concentric with the needles cylinder and engages the needles employed for the formation of partial rows of stitches. The device rotates with non-uniform motion in the same direction as the cylinder in such a way that, at each and every turn, it stops in a position where it leaves behind the additional thread guide. At this position, one of the two contours of the aforesaid cam triggers the first fall of said needles, which then form the first partial row of stitches. The device then accel-erates and passes the said needles remaining behind said additional thread guide. Then, the small pole causes said needles to rise from their held back level to the level where they are dropped. The second cam contour causes a second Eall of said needles, which then form a second partial row of stitches.
Finally, the cam slows down, reaching, after a full turn, the initial position, where it stops.
The advantages obtained by virtue of the present invention essentially consist of the possibility of having knitted bags oE different form, size and position, manufactured with continuous thread and unidirectional motion of the circular machine. Among various knitwear obtained in this way we might mention: socks with heel and pocket tip, briefs with front inner liner, stockings and panty hose with liner. One can also have knitwear from yarns of different colors, size and nature. Moreover, it is possible to make use of circular machines, with one or two needles cylinders and multiple feed, for manufacturing knitted tubes, and with two or multiples of two additional feeds for manufacturing knitted bags. Among other advantages of the invention one should mention that it is now possible to have printed fabric, since one can choose the needles for this purpose. Moreover, the manufacturing operation is highly reliable and safe even at speeds much greater than those of the present circular machines working with alterna-tive motion. The high quality of the products is by far superior than that of said alternative machines. Finally, the relative construction simplicity of the device allows to equip a knitwear circular machine with such device at competitive costs.
The invention is described in greater details as follows with the help of the attached drawings, which represent only one of the possible means of its implementation.
Figure 1 shows a cross section of the fall device in a rest position according to the invention;
Figure 2 shows the fall device at the rest of Figure 1 during the formation of the first partial row of stitches;
Figure 3 shows the device in motion in the course of forming the second partial row of stitches;
Figure 4 shows the sectors of a turn which are run at different speeds by the fall device and by the additional thread guide. At the center one finds the cam that controls the different speeds.
- 1~918~31 Figure 5 shows an axial vertical section of a knitwear circular machine equipped with a device according to the inven-tion;
Figure 6 shows a horizontal cross section of a detail of the timing device of the additional thread guide associated with the fall device according to the invention;
Figure 7 shows a horizontal cross section of a device for controlling the rotation of the fall device and of the addi-tional thread guide according to the invention;
Figure 8 shows a cross section of part of Figure 7;
Figure 9 shows a cross section of the remaining part of the device of Figure 7.
Referring to the attached drawing and in its essential elements the device for manufacturing knitted bags with continuous motion of a circular machine for tubular knitwear according to the invention includes: a fall device (200) concentric with and exter-nal to the needles cylinder (1), with a cam (201) having two active contours (211-212) designed to trigger two different falls of the needles, a countercam (202) below cam (201), and a small pole (203) coming before said cam (201) in the direction of rota-tion. The function of the small pole is that of raising the needles from a level where they are held back to a level where they are dropped. Said fall device, which is connected to the overhanging case (53) of the sinkers, rotates in one and the same direction as cylinder (1), with intermittent motion, in such a way that it stops at position (A) of Figure 4 corresponding to the first area of stitch formation. Contour (211) of cam (201) then lZ91~61 ,.. .
triggers the fall of needles (3) by a partial arc (for instance, 135) so as to form a first partial row of stitches. The fall device then accelerates up to position (B) of Figure 4 where the working speed is now greater (for instance, double) than that of the needles cylinder. From this position it continues its motion up to position (C) of Figure 4 with constant speed in order to pass the needles by said partial arc and to allow the small pole (203), in cooperation with contour (212) of cam (201), to raise and then to let fall said needles, thus forming a second partial row of stitches. Finally, the fall device slows down from posi-tion (C) until it reaches position (A) of Figure 4 where it stops.
Moreover, said fall device can be radially displaced, with known means, relative to the needles cylinder in order to change the distance, thus engaging in this way the needles for different partial arcs, depending on the type of knitted bag to be made (for instance, heel or tip with closure of the lower end of a sock cr stocking).
A circular machine for tubular knitwear equipped with the aforementioned device includes: an additional thread guide (98) radially positioned over cylinder (1) below platter (92).
Such thread guide is set into rotation by a hollow shaft ~97) going through the vertical shaft of platter (92). The hollow of said shaft (97) is used for the passage of the thread employed for manufacturing the knitted bag and for the passage of air sucked through the small opening (100) that assists said additional thread guide.
The rotation of the additional thread guide (98) takes ;IZ~881 .
place in the same direc-tion as cylinder (1) and with intermittent motion. At each and every turn, t~read guide (98) stops at posi-tion (A'), as shown in Figure 4, behind cam (201) of said fall device (200) in the course of the first thread feeding, then it quickly accelerates up to position (B'), as shown in Figure 4, and from there it continues up to position (C), as shown in Figure 4, with constant speed in order to supply sufficient yarn for the second feeding. Finally, from position (B) it begins to slow down until it stops at the initial position (A').
Moreover, it is known that said additional thread guide (98) can be radially displaced relative to cylinder (1). In this way, the thread guide hook protrudes, in operation, towards the external side of the head of the needles whereas, when it is not in operation, it is near said small opening (100).
It is quite obvious that other similar thread guides positioned one above the other, or side by side, can be associated to said additional thread guide (98) so as to allow multiple yarn feeing.
Several tongue needles (3) with double heel (130) dis-tributed along the partial arc of needles required for making aknitted bag, whose upper heel, at every turn of cylinder (1), is engaged by one (211) of the two contours of cam (201) for the first fall, and by the small pole (203) for the following rise of the needles from the position where they are held back to the position where they are dropped, and by the other contour (212) of cam (201) for the second fall.
Needles (3) belonging to different partial arcs, i.e.
1~918~1 those required to make different knitted bags of the same knit-wear, have upper heels of different length so that they can be selected by the fall device (200), previously positioned along corresponding distances from cylinder (1).
A wheelwork to obtain the unidirectional intermittent rotation, as previously described, of the fall device (200) simul-taneously with the rotation of cylinder (1), as well as of the additional thread guide (98). Such wheelwork consists of an epicyclic train with coincident axes, where the main wheels (221-225) are along axis (220), the satellite wheels (222-224) are along axis (223) and the gear carrier (226) has a wheel (227), which is controlled by a spring (246), in contact with the contour of cam (228) splined to the motor shaft (231). The movement obtained from cylinder carrier (229) through wheel (230) splined to shaft (231) is transmit-ted to the main wheel (221) by said epicyclic train through coupling (232) and wheels (233-234-234'), and from the main wheel (225) to transmission shaft (237) by means of wheels (235-235'-236-236'). From the transmission shaft the movement is transferred to the fall device (200) by means of wheel (238). Moreover, the movement is transmitted from said shaft (237) to shaft (97) of the additional thread guide (98) by means of an epicyclic train with coincident axes, the main wheels (239-241) being along axis (237), the satellite wheels (240-242) being along axis (243), and by means of the train carrier (245), of wheel (241') and of a geared belt (246).
Train carrier (226) of the first epicyclic train can move in both directions relative to a middle position for which 1~9188~
the transmission ratio of the wheelwork is determined by the number of gear teeth (such ratio is equal to one), whereas the ratio becomes positive or negative by displacing the train carrier in one direction or the other. Hence, at any one time the posi-tion of train carrier (226), which is controlled by the position of the small wheel (227) over cam (228), determines the speed at that time of the fall device (200) and of the additional thread guide (98). Likewise, train carrier (245) of the second epicyclic train, which has two possible working positions defined by the contact of a small wheel with a cam carried by shaft (23) (for simplicity, such small wheel is not shown in the figure), deter-mines the instantaneous position of the additional thread guide (in front or behind) relative to the fall device (200).
Instead of using an alternative forward and reverse motion of the train carrier (226) one obtains a unidirectional discontinuous motion by using a cam (228) with Archimedean spiral contour that engages, one at a time, several small wheels (227) of the train carrier (226).
In order to maintain the width of the knitted bags and to conserve the number of additional double feedings, the rotation of the needles cylinder will be carried out with variable rather than constant speed, slowing down and stopping the cylinder during the formation of the partial rows of stitches, when the fall device (200) is still in motion.
Claims (12)
1. Device for manufacturing knitted bags by means of a circular machine moving with continuous motion whose additional thread guide feeds the needles used for manufacturing a knitted bag with two feedings at each turn, one at rest and another in motion, the device being characterized by the fact that it includes:
a fall device external to and concentric with a needles cylinder and having a cam with two active contours, a countercam below said cam, and a small pole located in front, in the direction of rotation, relative to said cam, said fall device rotating in the same direction as said cylinder with intermittent motion so as to stop, at each turn, at a first position where one contour of the cam triggers, from rest, a first drop of needles required for manufacturing a knitted bag, the fall device then accelerating up to a second position from where it continues with constant speed but greater than the speed of the cylinder in order to pass said needles, thus allowing the small pole to raise the needles from a level where they are held back to a level where they are dropped and to allow the other contour of the cam to trigger, in motion, the second drop of the same needles, the fall device then slowing down until it comes to a full stop at the initial position.
a fall device external to and concentric with a needles cylinder and having a cam with two active contours, a countercam below said cam, and a small pole located in front, in the direction of rotation, relative to said cam, said fall device rotating in the same direction as said cylinder with intermittent motion so as to stop, at each turn, at a first position where one contour of the cam triggers, from rest, a first drop of needles required for manufacturing a knitted bag, the fall device then accelerating up to a second position from where it continues with constant speed but greater than the speed of the cylinder in order to pass said needles, thus allowing the small pole to raise the needles from a level where they are held back to a level where they are dropped and to allow the other contour of the cam to trigger, in motion, the second drop of the same needles, the fall device then slowing down until it comes to a full stop at the initial position.
2. Device according to claim 1 characterized by the fact that the active contours of said cam are in a V-shaped arrange-ment.
3. Device according to claim 1 characterized by the fact that said fall device can be radially displaced relative to the cylinder in order to allow the engagement of needles for the form-ation of partial rows of stitches, distributed along several partial arcs of the cylinder.
4. Circular machine for tubular knitwear equipped with a device according to claim 1 characterized by the fact that it includes:
at least an additional thread guide rotating above and in the same direction as the cylinder, the motion of the thread guide being in phase with the fall device so that, at each turn, it stops at a first position thereof behind the fall device posi-tioned at its first position, then accelerates up to a second position in order to pass the fall device positioned at its second position, then rotates with the same speed as the fall device until it reaches a third position, finally slowing down until it stops at the initial position, several double heel needles for the formation of partial rows of stitches, distributed along one or more partial arcs of the cylinder, means to set into rotation with non-uniform motion the fall device and the additional thread guide, means to synchronize the position of the additional thread guide with the position of the fall device in the course of the respective rotations.
at least an additional thread guide rotating above and in the same direction as the cylinder, the motion of the thread guide being in phase with the fall device so that, at each turn, it stops at a first position thereof behind the fall device posi-tioned at its first position, then accelerates up to a second position in order to pass the fall device positioned at its second position, then rotates with the same speed as the fall device until it reaches a third position, finally slowing down until it stops at the initial position, several double heel needles for the formation of partial rows of stitches, distributed along one or more partial arcs of the cylinder, means to set into rotation with non-uniform motion the fall device and the additional thread guide, means to synchronize the position of the additional thread guide with the position of the fall device in the course of the respective rotations.
5. Machine according to claim 4 characterized by the fact that the upper heel of the double heel needles is at different heights according to the corresponding partial arcs of the cylinder.
6. Machine according to claim 4 characterized by the fact that one or more similar additional thread guides, positioned one above the other or side by side, are associated to the first addi-tional thread guide in order to supply different yarns.
7. Machine according to claim 4 characterized by the fact that said means to set the fall device and the thread guide into rotation includes an epicyclic train with coincident axes, the main wheels and the satellite wheels being connected by a train carrier in alternative rotating motion, the instantaneous position of the train carrier being determined by a small wheel of the train carrier in contact with the contour of a cam.
8. Machine according to claim 7 characterized by the fact that the contour of said cam is designed according to the diagram of the speed of the fall device.
9. Machine according to claim 7 or 8 characterized by the fact that said train carrier moves with unidirectional rotational discontinuous motion, its instantaneous position being determined by the contact of one or more small wheels with the contour of a cam having an irregular Archimedean spiral form.
10. Machine according to claim 4 characterized by the fact that said means for synchronizing the additional thread guide with the fall device include an epicyclic train with coincident axes, the main wheels and the satellite wheels being connected by a train carrier, said train carrier having two working positions corresponding to the positions taken by the thread guide, behind and in front of the fall device, respectively, the instantaneous position of the train carrier being determined by a small wheel of the train carrier in contact with a cam splined to a shaft.
11. Machine according to claim 10 characterized by the fact that the contour of said cam is designed according to the diagram of the speed of the fall device.
12. Machine according to claim 4 characterized by the fact that the cylinder rotates with non-uniform unidirectional motion, slowing down and/or stopping during the time of formation of the partial rows of stitches, with the fall device still in motion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT9391A/83 | 1983-04-12 | ||
| IT09391/83A IT1198552B (en) | 1983-04-12 | 1983-04-12 | DEVICE FOR THE FORMATION OF MESH BAGS WITH A CIRCULAR MACHINE FOR TUBULAR MANUFACTURES WITH CONTINUOUS UNIDIRECTIONAL MOTOR AND MACHINE EQUIPPED FOR THAT DEVICE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1291881C true CA1291881C (en) | 1991-11-12 |
Family
ID=11129426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000451705A Expired - Lifetime CA1291881C (en) | 1983-04-12 | 1984-04-11 | Device for manufacturing knitted bags with a circular machine for tubularknitwear moving with continuous and unidirectional motion, and machine equipped with such a device |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0126035B1 (en) |
| JP (1) | JPS60146052A (en) |
| AT (1) | ATE27833T1 (en) |
| CA (1) | CA1291881C (en) |
| CS (1) | CS271305B2 (en) |
| DE (1) | DE3464266D1 (en) |
| ES (1) | ES531469A0 (en) |
| IT (1) | IT1198552B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITCO990024A1 (en) * | 1999-08-24 | 2001-02-24 | Franco Sciacca | METHOD AND EQUIPMENT FOR THE PRODUCTION OF TUBULAR KNITWEAR ARTICLES PROVIDED WITH ONE OR MORE LACES, BOWS, STRINGS OR SIMILAR PRODUCTS AND PRODUCTS |
| IT201600072994A1 (en) | 2016-07-13 | 2018-01-13 | Lonati Spa | Pick-up device for picking up a knitted tubular product from a circular knitting, hosiery or similar machine and transferring it to a unit designed to perform further operations on the product. |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2911807A (en) * | 1956-02-24 | 1959-11-10 | Lombardi Vincent | Knitting machine |
| DE1121264B (en) * | 1960-08-19 | 1962-01-04 | Schubert & Salzer Maschinen | Process and circular knitting machine for circular knitting of partially reinforced hosiery |
| CH421359A (en) * | 1963-02-04 | 1966-09-30 | Ki Ex Masterkije | Circular knitting machine for the production of well-designed knitwear with fixed side edges |
| US3270527A (en) * | 1963-10-24 | 1966-09-06 | Stretch Corp U | Circular knitting apparatus and method adapted to continuous rotative knitting of partial courses |
| IT1133568B (en) * | 1980-05-12 | 1986-07-09 | Brematex Spa | EQUIPMENT FOR THE FORMATION OF BAGS FOR HEEL AND TOE, IN CLAZETRY ITEMS TO BE MANUFACTURED WITH MACHINES IN WHICH CYLINDER IS EQUIPPED WITH AN ALTERNATE MOTOR |
-
1983
- 1983-04-12 IT IT09391/83A patent/IT1198552B/en active
-
1984
- 1984-03-29 EP EP84830095A patent/EP0126035B1/en not_active Expired
- 1984-03-29 AT AT84830095T patent/ATE27833T1/en not_active IP Right Cessation
- 1984-03-29 DE DE8484830095T patent/DE3464266D1/en not_active Expired
- 1984-04-09 CS CS842674A patent/CS271305B2/en unknown
- 1984-04-10 JP JP59070173A patent/JPS60146052A/en active Granted
- 1984-04-10 ES ES531469A patent/ES531469A0/en active Granted
- 1984-04-11 CA CA000451705A patent/CA1291881C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60146052A (en) | 1985-08-01 |
| CS267484A2 (en) | 1989-11-14 |
| JPH0577777B2 (en) | 1993-10-27 |
| IT1198552B (en) | 1988-12-21 |
| ATE27833T1 (en) | 1987-07-15 |
| EP0126035B1 (en) | 1987-06-16 |
| DE3464266D1 (en) | 1987-07-23 |
| ES8503382A1 (en) | 1985-02-16 |
| EP0126035A1 (en) | 1984-11-21 |
| CS271305B2 (en) | 1990-09-12 |
| ES531469A0 (en) | 1985-02-16 |
| IT8309391A0 (en) | 1983-04-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |