In 1994, ZARIF Tadjibaev was the first to invent the new ZARIF technology for forming a double thread chain stitch type 401 using a rotary looper. This technology was patented in 2000 under US Patent No. 6095069.
ZARIF Tadjibaev, having launched a prototype of the ZARIF sewing machine based on the ZARIF sewing technology from 1994, has been working since 1997 to improve the ZARIF sewing technology from 1994 to make it an ideal technology for straight stitch sewing.
And in 2023, ZARIF Tadjibaev achieved his goal by inventing the ideal ZARIF double thread chain stitch technology with a rotary looper for sewing straight stitches.
We are a small technology company founded in 2012 by ZARIF Tadjibaev, and we are not in a position to put our ideal ZARIF double thread chain stitch technology into production by mass producing an industrial version of our innovative ZARIF sewing machine.
That's why we've launched a crowdfunding campaign to raise funds to mass produce an industrial version of our innovative ZARIF sewing machine.
You can find out more about our campaign and support us on GoGetFunding (https://gogetfunding.com/zarif).
Please consider making a donation to support our project.
Your donation can be any amount, but if it is $10 or more, you will become a pre-order customer for the industrial version of our innovative ZARIF sewing machine and enjoy a 10% discount on the price of the machine.
The number of industrial versions of our innovative ZARIF sewing machine you can purchase at this discounted price is equal to your donation amount divided by 10.
nce we have raised the necessary funds, we will start setting up production and you will be able to buy your order at a 10% discount when we start mass production of the industrial version of our innovative ZARIF sewing machine.
ZARIF sewing technology 2023
VIDEO: ZARIF has revolutionised straight stitch sewing in the history of mankind.
THE STRAIGHT STITCH SEWING REVOLUTION IN THE HISTORY OF MANKIND.
REVOLUTIONARY IDEAL ZARIF 2023 DOUBLE THREAD CHAIN STITCH TECHNOLOGY WITH ROTARY LOOPER.
We have revolutionised straight stitch sewing in the history of mankind in 2023 with our revolutionary ideal ZARIF 2023 double thread chain stitch technology using a rotary looper.
The existing technologies of lockstitch type 301 and double thread chain stitch type 401, which are currently used for sewing straight stitches, have a lot of disadvantages, which can be called «eternal» disadvantages, because the disadvantages are connected with the technology of forming these stitches.
The «eternal» disadvantages of the existing lockstitch technologies type 301 are related to the use of the hook, which contains the bobbin with the bottom thread.
The «eternal» disadvantages of the existing double thread chain stitch technologies type 401 are related to the use of a looper carrying the bottom thread.
These existing sewing technologies will not become the ideal technology for straight stitch sewing, no matter how much they develop in the future, because of their «eternal» disadvantages.
The development of an ideal technology for sewing straight stitches without the «eternal» disadvantages of existing sewing technologies can only be achieved by inventing a new technology for the formation of the double thread chain stitch type 401, as it is technically impossible to invent a new technology for the formation of the lockstitch type 301 without the use of a hook.
We invented the world's first new ZARIF double thread chain stitch technology using a rotary looper in 1994, which was granted US Patent No.6095069 in 2000.
The use of a rotary looper has enabled us to produce the world's first new double thread chain stitch type 401, where the loops of the top and bottom threads are rotated 180 degrees.
We have spent 26 years perfecting our ZARIF sewing technology of the 1994, making it the world's first ideal technology for straight stitch sewing.
Watch our «Revolutionary ZARIF Sewing Technology 2023» videos on our YouTube channel, where our prototype ZARIF double thread chain stitch sewing machine practically demonstrates our revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper with stitch formation in one direction only.
Our ZARIF 2023 sewing technology is the first in the world to allow high quality straight stitches on various materials up to 8 mm thick with a short needle bar stroke of 32 mm without any adjustments once the normal tension is set for all threads.
In addition, our ZARIF 2023 sewing technology is the first in the world to allow sewing without skipping a single stitch, without breaking threads, without breaking the needle and without deforming the needle tip, provided that there are no knots in the threads and that the needle size matches the material to be sewn.
In addition, our ZARIF 2023 sewing technology is the first in the world to reduce the length of a double thread chain stitch to 0.5 mm in order to securely tack the end of the chain seam by stitch condensation with a stitch length of 0.5 mm.
In addition, our ZARIF 2023 sewing technology is the first in the world to increase the maximum allowable gap between the looper point and the needle to 0.5 mm, making it easy to change to other needle sizes from Nm.130/21 to Nm.60/8 without adjusting the looper to the needle.
In addition, based on our ZARIF 2023 sewing technology, it is possible for the first time in the world to design and manufacture industrial double thread chain stitch sewing machines with different types of platforms and different types of material feed, with a very simple mechanical design that ensures high reliability and a long service life.
We are the first and only company in the world to have revolutionised straight stitch sewing in the history of mankind with our revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper.
Our prototype ZARIF double thread chain stitch sewing machine has practically proved that our revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper is a world leader in sewing various materials with straight stitch, and for the first time in the world makes it possible to replace the lockstitch type 301 with our new double thread chain stitch type 401 on a very large scale (watch our video films «Revolutionary ZARIF sewing technology 2023» on our YouTube channel).
13_ZARIF revolutionised the sewing of various materials in the history of mankind_Threads #40 S/2.
For the first time in the world, our new double thread chain stitch type 401 can replace the lockstitch type 301 on a large scale.
Our revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper is the world leader in straight stitch sewing.
It is known that the traditional method of joining materials using threads is currently used in the production of various sewn items made from different materials. This method has an advantage over other methods of joining materials that do not use threads, such as welding and gluing, because it allows a more versatile approach to joining materials. The traditional thread-based method will continue to be the dominant method for a long time to come, as any alternative methods that do not use threads will always be less versatile than the thread-based method in terms of the ability to join different types of materials in different combinations.
However, the thread-based lockstitch and chainstitch technologies invented in the 19th century and currently used to join materials with threads have some significant disadvantages that cannot be eliminated because they are related to the way these stitches are formed. Therefore, these disadvantages can be considered «eternal» because they cannot be eliminated in the future, no matter how much these sewing technologies evolve in the future.
We know that of all the existing thread stitches, straight thread stitches are the most widely used in the manufacture of various sewn products. At present, to obtain a straight thread seam, mainly the technologies for forming a lockstitch type 301 and technologies for forming a double thread chain stitch type 401, using a looper with an eyelet, where the bottom thread is filled.
These existing sewing technologies have the following «eternal» disadvantages: skipping stitches, thread breakage, needle breakage and deformation of the needle tip during sewing, it is necessary to adjust the thread tension when changing the thickness, density, stiffness and elasticity of the materials to be sewn, it is necessary to adjust the hook or looper relative to the needle when changing from one needle number to another - due to the small permissible gap of 0.1 mm between the point of the hook or looper and the needle, it is necessary to increase the stroke of the needle bar when sewing heavy and thick materials up to 8 mm thick.
Our revolutionary ideal ZARIF 2023 technology double thread chain stitch with rotary looper is the world leader in straight stitch sewing as it does not have any of the above «eternal» disadvantages of existing sewing technologies for straight stitch sewing.
Our global mission in the field of straight stitch sewing:
1. To simplify the mechanical design of a sewing machine for straight thread seams.
2. To sew a straight thread seams without skipping stitches, thread breakage, needle breakage and needle tip deformation.
3. To ensure high quality sewing with straight thread seams on different materials and combinations of materials up to 8 mm thick with a short needle bar stroke of 32 mm without adjusting the normal tension of the threads.
4. To ensure tight joining of all types of materials without adjusting the normal tension of the threads with our new double thread chain stitch type 401, where the loops of the top and bottom threads are rotated 180 degrees.
5. To ensure a smooth thread seam when sewing lightweight fabrics and an elastic thread seam when sewing elastic fabrics without adjusting the normal tension of the threads.
6. To ensure that the end of the chain seam is reliably tack against unravelling by reducing the stitch length to 0.5 mm using condensation stitching at the end of the chain seam.
7. To provide an easy transition to other needle numbers when sewing different materials without adjusting the looper relative to the needle, in the range from needle number Nm.130/21 to needle number Nm.60/8, by increasing the maximum allowable gap between the point of the looper and the needle to 0.5 mm.
8. To ensure the further development of the automation of the sewing process in sewing with straight thread seams.
9. To ensure high reliability and high service life of sewing machines and automatic sewing systems in sewing with straight thread seams.
10. To provide large-scale replacement of the lockstitch type 301 with our new double thread chain stitch type 401, thus eliminating the need to frequently refill the bottom thread during the sewing process.
Our ZARIF 2023 double thread chain stitch technology with a rotary looper has made the following revolutions in straight stitch sewing:
1. For the first time in the world, various types of double thread chain stitch sewing machines with simple mechanical construction, low maintenance and long service life can be designed and manufactured.
2. For the first time in the world it is possible to sew materials up to 8 mm thick with a short stroke needle bar of the 32 mm.
3. For the first time in the world, it is possible to sew various types of materials up to 8 mm thick with high quality without any adjustments, just by setting the normal tension of the threads.
4. For the first time in the world, the feeding and smooth tightening of the top thread and the bottom thread during the formation of a double thread chain stitch is carried out with the participation of two rotating twin-disc cam thread take-ups.
5. For the first time in the world, with the help of know-how, it is possible to tighten the top thread strongly when forming a double thread chain stitch, which allows for the first time to obtain a dense join of materials using a double thread chain stitch and reduce the thickness of the stitch and increase the resistance of the stitch to wear.
6. For the first time in the world, with the help of know-how, the top thread is not tightened very much when forming a double thread chain stitch, which for the first time makes it possible to obtain a smooth seam when sewing light materials and an elastic seam when sewing elastic materials.
7. For the first time in the world, the collision of the needle with the looper body during the downward movement of the needle is completely eliminated and the probability of the needle colliding with the needle plate is very low, making it possible to sew without needle breakage and needle tip deformation for the first time in the world.
8. For the first time in the world it was possible to sew without skipping a stitch and without thread breakage, provided the threads were free of knots and the needle was correctly matched to the material being sewn.
9. For the first time in the world, it is now possible to reduce the length of the double thread chain stitch to 0.5 mm, making it possible to reliably tack the end of a chain stitch to prevent unravelling by condensation stitching with a stitch length of 0.5 mm.
ZARIF double thread chain stitch technology from 1994 with rotary looper (see US Patent No.6095069).
Where: 1- top thread; 2- needle; 3- material; 4- needle plate; 5- bottom thread; 6- bottom thread guide; 7- rotary looper; 8- pusher of the bottom thread.
Attention: Our revolutionary ideal ZARIF double thread chain stitch technology from 2023 with rotary looper will be published after the Patent for Inventions is issued for it.
History of the invention of the revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper.
In 1994, we invented a completely new ZARIF double thread chain stitch technology using a rotary looper, for which we were granted US Patent No.6,095,069 in 2000.
Prior to our invention, single thread chain stitch technology used a rotary looper invented by American inventor James Edward Allen Gibbs in 1857 (see US Patent No.17427).
A rotary looper is the only single-piece working unit in the sewing industry that is able to draw loops of thread around its body and rotate the loops of thread 180 degrees with its tail.
Therefore, the use of a rotary looper in our ZARIF 1994 double thread chain stitch technology has enabled us to be the first in the world to create a new double thread chain stitch type 401 in which the loops of the top and bottom threads are rotated 180 degrees.
VIDEO: SINGER single thread chain stitch sewing machine, using a rotary looper, manufactured in the 19th century.
New double thread chain stitch type 401 in which the loops of the top and bottom threads are rotated 180 degrees.
The ZARIF 1994 double thread chain stitch technology uses six working units to form a stitch, such as: a looper that makes two turns in a cycle in a vertical plane; a needle with a one long groove that reciprocates in a vertical plane; a pusher that makes an oscillating motion in a horizontal plane to feed the bottom thread to the looper; two rotating twin-disc cam thread take-ups for feeding and tightening the top and bottom threads respectively; a material feed system.
In 1997, based on our ZARIF 1994 sewing technology, we produced a prototype of the ZARIF double thread chain stitch sewing machine by reconstructing an industrial lockstitch sewing machine 1022 class of the «Orsha» Company (Belarus). We experimented with this machine and learned about some of the shortcomings of our ZARIF 1994 sewing technology.
Since then, in order to develop the ideal ZARIF sewing technology for straight stitch sewing, we have gradually incorporated our knowledge into the design of our prototype ZARIF sewing machine and conducted experimental tests, which allowed us to improve the ZARIF 1994 sewing technology in 2020 (ZARIF 2020 sewing technology), in 2021 (ZARIF 2021 sewing technology), and finally in 2023, after 26 years of continuous research and experimentation, we invented the revolutionary and ideal ZARIF 2023 sewing technology.
Revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper has made the following technological revolutions in the field of sewing.
For the first time in the world, a rotary looper is used to form a double thread chain stitch.
For the first time in the world, thanks to the use of a rotary looper, a new double thread chain stitch type 401 was obtained, where the loops of the top and bottom threads are rotated 180 degrees.
For the first time in the world, a needle with one long groove is used to form a double thread chain stitch.
For the first time in the world, the collision of the needle (1) with the body of the looper (2) is completely excluded when the needle moves down in the formation of a double thread chain stitch.
For the first time in the world, high reliability of stitch formation without the use of left and right needle guards.
For the first time in the world, the simplest needle mechanism (crank pin-crank mechanism) is used to form a double thread chain stitch.
For the first time in the world, the top and bottom threads are smoothly shortened and tightened using two rotating two-disc cam thread take-ups.
For the first time in the world, sewing materials with a thickness of 8 mm with a small needle bar stroke of 32 mm.
For the first time in the world, the maximum allowable gap (a) between the looper point and the needle has been increased to 0.5 mm, and the height (b) of the needle lifting from the lower position is constant for all stitched materials.
History of manufacturing a prototype of the revolutionary ZARIF double thread chain stitch sewing machine of the 2023.
In 1997, using our ZARIF double thread chain stitch technology of the 1994, we produced a prototype of a ZARIF double thread chain stitch sewing machine by reconstructing a 1022 class industrial lockstitch sewing machine made by company «Orsha» (Belarus).
Industrial lockstitch sewing machine 1022 class of the «Orsha» company (Belarus), from which the thread take-up mechanism, the hook and the thread winding mechanism on the bobbin have been removed.
Our experiments on a prototype of the ZARIF sewing machine have allowed us to identify the shortcomings of our ZARIF double thread chain stitch technology of the 1994, when we were sewing various materials.
Then, in 1997, we set ourselves the goal of improving our ZARIF double thread chain stitch technology of the 1994 by incorporating our knowledge into the mechanical design of the prototype ZARIF sewing machine of the 1997 to create the world's most ideal universal sewing machine for high-quality sewing of various materials.
In order to achieve our goal, we have continuously conducted scientific research and experiments from 1997 to 2023, as a result of which we have introduced a lot of know-how into the design of our prototype ZARIF sewing machine, which has allowed us to gradually improve our ZARIF sewing technology since 1994, these improvement processes were carried out in 2020, 2021 and 2023.
Invented by us in 2023, the ZARIF double thread chain stitch technology is the most advanced version of our ZARIF double thread chain stitch technology invented in 1994, as it enables high-quality sewing of various materials without any adjustments after setting the normal tension of the threads, as proved by our prototype ZARIF sewing machine of the 2023.
Prototype of the revolutionary ZARIF 2023 double thread chain stitch sewing machine: type stitch, working units and technical specifications.
Prototype ZARIF 2023 double thread chain stitch sewing machine, based on ZARIF 2023 double thread chain stitch technology with rotary looper.
Industrial lockstitch sewing machine class 1022 of the company «Orsha» (Belarus), on the basis of which the prototype of the revolutionary ZARIF 2023 double thread chain stitch sewing machine was made.
TYPE STITCH: NEW DOUBLE THREAD CHAIN STITCH TYPE 401.
Thanks to the use of a rotary looper, a new double thread chain stitch type 401 is obtained in which the loops of the top and bottom threads are rotated 180 degrees.
A normal new double thread chain stitch type 401 in which the loop of the top thread is strongly tightened, which allows a tight join of the materials, reduces the thickness of the stitch seam and increases the wear resistance of the stitch seam.
Elastic new double-thread chain stitch type 401, in which the loop of the top thread is loosely tightened, giving a smooth seam on light materials and an elastic seam on elastic materials.
WORKING UNITS:
Rotary looper.
Needle with one long groove.
Pusher of the bottom thread.
Take-up of the top thread.
Take-up of the bottom thread.
Bottom feed.
TECHNICAL SPECIFICATIONS:
Application: For all materials.
Platform type: Flat.
The maximum speed of sewing: 5000 s.p.m.
Length of a stitch: From 5 mm to 0,5 mm.
Needle bar stroke: 32 mm.
Lift of the presser foot: 9 mm.
Maximum thickness of sewing material: 8 mm.
Type and number of needles: DPx5 or DPx17, from Nm.60/8 to Nm.130/21.
Type feed material: Bottom feed.
The world's first prototype of the revolutionary ZARIF 2023 double thread chain stitch sewing machine with very simple mechanical designs.
Kinematic diagram of the prototype ZARIF 2023 double thread chain stitch sewing machine.
Where:
1- main shaft;
2- needle;
3- rotary looper;
4- thread guide of the bottom thread;
5- pusher of the bottom thread;
6- feed dog;
7- presser foot;
8- nut for regulation of pressure of a press foot on a material;
9- two dick-shaped cam thread take-up of the top thread;
10- tension device of the top thread;
11- two dick-shaped cam thread take-up of the bottom thread;
12- tension device of the bottom thread;
13- lever for regulation of length of a stitch and reverse feed.
Our prototype of the revolutionary ZARIF 2023 double thread chain stitch sewing machine, has a very simple mechanical design, because:
1. Of the six working units, three working units (looper and two thread take-ups) perform a uniform rotary movement.
2. The simplest needle mechanism (crank-slider mechanism) is used to give the needle a reciprocating motion in the vertical plane.
The ZARIF sewing machine is also very easy to repair as all working units can be easily removed without dismantling other parts of the sewing machine.
The simplicity of the mechanical construction of the ZARIF double thread chain stitch sewing machine has a positive effect on the reliability of its operation and reduces the cost of its manufacture.
Customers will enjoy the following benefits when using the ZARIF double thread chain stitch sewing machine, thanks to our revolutionary ZARIF sewing technology of 2023 using a rotary looper, which we have spent approximately 26 years developing:
1. For the first time, the sewing process is carried out with the new double thread chain stitch type 401, which has a bottom very similar to the lockstitch type 301, thanks to the 180-degrees turned loops of the top and bottom threads, made possible by the use of a rotary looper.
2. For the first time, with one model of sewing machine with a small needle bar stroke of 32 mm, various materials up to 8 mm thick can be sewn with quality, without any adjustments, it will be sufficient to set the normal tension for the threads.
3. For the first time, the sewing process is performed without skipping stitches, threads breakage, needle breakage and needle tip deformation.
4. For the first time, a needle with one long groove was used for sewing with a double thread chain stitch, which will not come into contact with the body of the looper when moving down.
5. For the first time, the use of the double thread chain stitch makes it is possible to obtain a tight joint of the materials and to reduce the thickness of the bottom side of the chain seam, this is thanks to the strong pulling force of the loop on the top thread in the stitches, obtained through the use of know-how.
6. For the first time, it is now possible to slightly tighten the loop of the top thread in the stitches using know-how, which increases the smoothness of the seam in light materials and the elasticity of the seam in elastic materials.
7. For the first time it is possible to reduce the length of a double thread chain stitch to 0.5 mm, which makes it possible to reliably tack the end of a chain seam against unravelling by condensation stitching with a stitch length of 0.5 mm, it is also possible to obtain a high-strength and hard-to-unravel chain seam, by reducing the stitch length to 0.5 mm after each stitch.
8. For the first time, it is easy to change to other needle sizes without adjusting the looper relative to the needle, as the maximum gap between the looper point and the needle has been increased to 0.5 mm.
Automatic thread trimming technology for ZARIF 2023 double thread chain stitch technology with rotary looper.
Automatic thread trimming is a feature available on many modern industrial sewing machines and all automated sewing systems. With this in mind, we have devoted considerable attention to the development of automatic thread trimming technology for our ZARIF double thread chain stitch technology using a rotary looper.
As a result, in 2020, we were able to invent and develop an automatic thread trimming technology for our ZARIF double thread chain stitch technology using a rotary looper. This technology was slightly improved in 2021, and the final improvements were made in 2023.
We have not yet produced an automatic thread trimmer based on our 2023 automatic thread trimming technology. However, the drawings we have produced for the automatic thread trimming technology demonstrate its feasibility in theory.
If, after tacking the end of the chain seam by condensing stitches with a stitch length of 0.5 mm and then carry out automatic thread trimming, the resulting chain seam will not unravel from the end.
If, after tacking the end of the chain seam by condensing stitches with a stitch length of 0.5 mm to perform manual thread trimming, the resulting chain seam will be very difficult to unravel from the end.
Chain seam is difficult to unravel from the end of the seam and is obtained by manually trimming the threads.
Chain seam that does not unravel from the end of the seam is obtained by automatic thread trimming.
Patent protection of our revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper.
We plan to file a patent application for our revolutionary ideal ZARIF double thread chain stitch technology and automatic thread trimming technology, which we invented, in 2023.
Our goal is to further patent this technology in many countries around the world, especially in countries where companies manufacture industrial sewing machines and automatic sewing systems.
The revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper is a revolutionary solution for automating straight stitch sewing.
As you know, the future of mass production of various sewing products depends on the wider adoption of automation in manufacturing, including the use of automated sewing systems.
Our revolutionary ideal ZARIF 2023 double thread chain stitch technology is a revolutionary solution for automating straight stitch sewing than existing straight stitch sewing technologies.
Because only our revolutionary ideal ZARIF 2023 double thread chain stitch technology is able to sew straight stitch quality seams on various materials up to 8 mm thick with a small needle bar stroke of 32 mm without any adjustments, simply by setting the normal tension of the threads, and is also able to sew without skipping a stitch, without thread breakage, without breaking the needle and without deforming the needle tip, which is very important for automating the sewing process.
Our revolutionary ideal ZARIF 2023 double thread chain stitch technology has a one-way stitch formation, making it suitable for the development and production of various automated sewing systems with material feed in one direction.
In addition, based on our revolutionary ideal ZARIF 2023 double thread chain stitch technology, it is possible to develop and produce an automatic template sewing machine with a rotating head, which makes it possible to obtain any complex stitch seam, since the head and the lower part with the needle plate are able to rotate synchronously in any direction in the range of 360 degrees, coinciding with the material feed along the X and Y coordinates.
However, such a machine will have a very complex mechanical design and sophisticated electronic control to synchronise the rotation of the head and the lower part of the machine and to synchronise their rotation with the direction of material feed.
Therefore, we conducted scientific research to develop a device that would enable our ZARIF sewing technology to receive a stitch when the material is fed in any direction.
In 2020, we were able to develop such a device, which we further improved in 2021 and completed the improvement process in 2023.
We have not yet tested the functionality of the sewing process when the material is fed in any direction when our ZARIF sewing technology is used in conjunction with this device, but the drawings we have produced theoretically demonstrate its functionality.
Thanks to this invention of ours, based on our ZARIF 2023 sewing technology of the, it will be possible to design and manufacture various conventional automated template sewing machines, various automated sewing systems, as well as single and double head quilting machines, with stitch formation in any direction.
For the first time in the world it is possible to replace the lockstitch type 301 with our new double thread chain stitch type 401 on a very large scale is possible thanks to our revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper.
As you know, the lockstitch type 301 and the double thread chain stitch type 401, which are used for straight stitch sewing, are widely used in the production of a variety of sewn products compared to other stitch types.
The technologies used today to form a lockstitch type 301, and to form a double thread chain stitch, type 401, using a looper with an eye for filling the bottom thread, were invented as early as the 19th century.
These sewing technologies are not ideal for straight stitches because they have several disadvantages that cannot be overcome, no matter how they are developed in the future. These disadvantages are inherent in the way these stitches are formed, so they can be considered «eternal».
Our revolutionary ideal ZARIF 2023 double thread chain stitch technology does not have the «eternal» disadvantages of the existing stitch forming technologies type 301 and type 401 and for the first time in the world it is possible to replace the lockstitch type 301 with our new double thread chain stitch type 401 on a very large scale.
For the first time in the world, our ZARIF 2023 sewing technology allows high-quality sewing of various materials up to 8 mm thick with a small needle bar stroke of 32 mm, without any adjustments after setting the normal tension of the threads, and also performs sewing without skipping a stitch, without breaking the threads, without breaking the needle, without deforming the needle tip, and for the first time in the world, it provides tight joining of materials with a double thread chain stitch and securely tacks the end of the chain seam by condensation stitching with a stitch length of 0.5 mm.
In the ZARIF 2023 sewing technology, by using a rotary looper, a new double thread chain stitch type 401 is created, where the loops of the top and bottom threads are rotated 180 degrees, making the bottom of the seam very similar to the lockstitch type 301.
In addition, the ZARIF 2023 sewing technology is able to tighten the loop of the top thread in the stitch strongly to join the materials tightly and to reduce the stitch thickness to increase the stitch seam wear resistance, and to tighten the loop of the top thread in the stitch weakly to obtain a smooth seam on light materials and a stretchy seam on elastic materials.
For the first time in the world, the ZARIF 2023 sewing technology has increased the maximum permissible distance between the looper point and the needle to 0.5 mm, which makes it easy to change to other needle sizes from needle Nm.130/21 to needle Nm.60/8, without adjusting the looper to the needle.
Areas of application of the revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper for sewing with straight stitching.
Applications of the revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper with stitch formation in one direction only.
Based on the revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper where the stitch formation takes place in one direction only, the following industrial sewing machines and automatic sewing systems can be designed and manufactured:
1. All types of industrial sewing machines for straight stitching, having different types of platforms, such as flat, cylindrical and columnar, using all types of material feed, such as bottom feed, needle feed, top-bottom feed, unison feed (top-bottom-needle feed), differential feed, roller feed.
Flat bed.
Long arm flat bed.
Cylinder bed.
Post bed.
Bottom feed.
Bottom feed and pull roller.
Bottom feed and pressure roller.
Needle feed.
Differential feed.
Top and bottom feed.
Unison feed.
Roller feed.
2. Various automated sewing systems with automatic material feed in one direction only.
3. Programmable automatic pattern sewing machines with a 360° rotating head with material feed in any direction in the X and Y axes according to the programme, where the head and the lower part with the needle plate rotate together synchronously in the material feed direction according to the programme.
Applications of the revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper with stitch formation in any direction.
Based on the revolutionary ideal ZARIF 2023 double thread chain stitch technology with rotary looper, together with a special device where the stitch formation can occur in any direction, the following automatic sewing systems can be designed and manufactured:
1. Various conventional programmable automatic pattern sewing machines.
2. Various automated sewing systems.
3. Single and double head quilting machines.
Could our revolutionary ideal ZARIF 2023 sewing technology with rotary looper become obsolete in the future? Our answer is NO.
Our answer is NO. The sewing technologies currently used, such as the straight stitch with lockstitch type 301 and the double thread chain stitch type 401, may evolve in the future, but they will never reach the level of our ideal ZARIF 2023 sewing technology. This is due to their «eternal» disadvantages.
«Eternal» disadvantages inherent in both lockstitch technologies and double thread chain stitch technologies with a looper with an eyelet for filling the bottom thread: skipping stitches, thread breakage, needle breakage and deformation of the needle tip during sewing, it is necessary to adjust the thread tension when changing the thickness, density, stiffness and elasticity of the materials to be sewn, it is necessary to adjust the hook or looper relative to the needle when changing from one needle number to another - due to the small permissible gap of 0.1 mm between the point of the hook or looper and the needle, it is necessary to increase the stroke of the needle bar when sewing heavy and thick materials up to 8 mm thick.
The «eternal» disadvantages inherent only to lockstitch technologies: frequent replacement of the hook bobbin, complex design of all types of hooks, the presence of a slipping zone in the hook that requires lubrication and reduces its life, and can also lead to a sudden stop of the sewing machine when the hook jams due to entering the sliding zone of the thread segments, the top thread is unevenly tightened with a thread take-up.
The «eternal» disadvantages inherent only to double thread chain stitch technologies with a looper with an eyelet for filling the bottom thread: the participation of a needle in the preliminary tightening of the loop of the top thread located in the previous stitch forces the use of a needle with two long grooves, as well as the final tightening of the loop of the top thread in the stitch by the body of the looper on which the loop of the top thread is carried, they are not able to tighten the loop of the top thread in the stitch very much, which does not allow to use a double thread chain stitch type 401 to make a tight join of materials and high-quality sewing of various materials, as well as the minimum stitch length is limited to 1 mm, which does not allow to obtain a reliable tacking of the end of the chain seam by condensation stitching.
It is technically impossible to create an ideal double thread chain stitch technology without the use of a rotary looper. For example, the introduction of a special hook in the sewing industry was not feasible (see Patent US3811392 from 1974 https://patents.google.com/patent/US3811392A).