The present invention is a part of a yarn transfer system used for transferring yarn from a full bobbin to an empty bobbin typically fitted on a winder frame. The invention broadly comprises a yarn traverse device used in transferring a continuously arriving yarn onto an empty bobbin for commencing of winding proces...

The present invention discloses a device and a method for facilitating precise motion in forward and reverse direction of spreader bar used in separating sheets of a tubular fabric used for sack making on an automated sack-making machine. The device uses a servo mechanism incorporating sensors, servo motors and driv...

Woven or non-woven plastic bags of a wide variety of sizes and shapes are used to store bulk materials such as grains and minerals. Pillow shaped and block bottom bags are popular. In developing nations, these bags are handled manually or with the aid of mechanical devices such as sharp pointed hooks. The hooks pier...

The invention provides a fabric guide device that guides the fabric as it passes over the various conveyor regions by preventing deformation of light weight and soft fabric at high speeds in these regions. The invention incorporates gripping device whereby a positive grip is provided to the advancing fabric. The inv...

In the conventional circular weaving machines, weaving of fabrics of different sizes requires change of holding arm to suit a particular fabric size. This is inefficient as it increases downtime of the machine. The present invention discloses a circular weaving machine incorporating an adjustable weaving ring holder...

The invention discloses a device for sensing end of warp yarn on a circular weaving machine (CWM). It has an improved drop wire and a device to detect the end of a running yarn on a CWM. The device also incorporates an electric circuit which is kept open during normal working of the loom. When a yarn break is de...

The invention relates to an automatic turret type yarn winding device. The automatic bobbin changeover process involves winding of yarn on a bobbin, followed by rotation of the turret to bring an empty bobbin into the winding position. Pressure rollers are provided to ensure consistent and accurate winding. The accu...

The invention relates to a device (1) and to a method for transporting tubular bag bodies (2) said device comprising a longitudinal transport apparatus (3) by means of which the tubular bag bodies (2) can be transported substantially in the direction (3 ) of the longitudinal extent of the bag bodies a transverse tra...

The invention relates to a device and to a method for forming a bottom opening (8) between bag segments (2", 2") at the open end region (9) of a tubular bag body (2), comprising a transport apparatus (3) for transporting the bag body (2) in a transport direction (5) transverse to the longitudinal extent (6) of the b...

Device and method for forming a bottom opening (8) between bag sections (2", 2"") at the open end region (9) of a tubular bag body (2), with a transport device (3) for transporting the bag body (2) in a transport direction (5) transverse to its longitudinal extension (6), and with an opening device (7) for formin...

The present invention is specially adapted for use on automated cutting and stitching machine for polyolefine woven sack formation. On any typical such machines, the required length of tubular woven polyolefine fabric is conveyed from the fabric roller onto a thermo-cutting device. After the fabric is cut to the req...

The present invention provides an apparatus for and method of cutting stitching threads joining consecutive bags on a bag making line. When all stitching of pillow-shaped storage sacks is completed on an automated bag making line, any two consecutive bags are still connected with a stitching thread. The present inve...

The invention discloses a woven fabric (1A) made from bast yarn and bast compatible non-bast yarn, its method of manufacturing and a sack/bag from such fabric. The woven fabric (1A) of invention is made from bast yarn (3A) and bast-compatible non bast yarn (2A, 2B) to make sacks/bags (1) for packaging applications, ...

The invention relates to the field of weaving looms for tubular fabric. In particular, the invention relates to the bobbins that are used to wind yarn that is used to make the tubular fabric. The present invention provides durable bobbin tubes of reduced wear, thereby addressing the problem of unacceptably high wear...

This invention relates to producing bags for packing and storing of goods. More particularly, the invention relates to flat or tubular leno weave fabric which is comprised of at least one warp thread (6A) that has one of its strands (6B or 6C) made from bulk yarn as weft and/or at least one of its weft threads (5A) ...

The invention relates to an automated method and an apparatus for making of pillow-shaped sacks with a valve. The apparatus consists of a number of stations positioned sequentially for the purposes of cutting; bottom folding and stitching; inward fold forming; edge cutting; folding and stitching. The valve forming f...

The invention discloses a flat or tubular type woven fabric (1A) made from yarn which has texture like jute. It has warp and weft threads (1B, 1C) in an arrangement such that some or all of either weft or warp, or both, of said fabric are made threads selected from a group comprising jute threads (2), synthetic bulk...

The present invention provides a semi-automated device (15) for cutting web material (3). The device (15) is provided with means for detecting and monitoring defects in the web material (3), a cutter (5) to make cuts in the web material (3), and a unit to separate the defective cut sections (3b) of web material (3)....

The present invention relates a hot air circulating chamber with air-flow control system used in manufacture of thermo-plastic products such as monofilament, plastic web strips, narrow film strip, multi-filament. Conventional systems do not allow controlling temperature and air-flow in hot air channel/chamber to ach...

Pusher elements that move forward and backward are used for forming valves in sack making. Their settings deteriorate over time causing wear and tear adversely affecting accuracy of pusher element's operation. The invention discloses a device for controlling the motion of a pusher element (1) in an automated sack ma...

The invention discloses a device to accurately position the turrets in automatic yarn winding devices. In a continuous yarn winding operation, the turret carrying bobbins is rotated such that a bobbin carrying fully formed package is moved from its winding position to a doffing position through an amount sli...

In a method for closing a tubular sack body made from a woven fabric of monoaxially drawn polymer in particular polyolefin or polypropylene ribbons comprising the production of a bottom fold in such a way that the sack has a substantially rectangular bottom at least two layers of the bottom which overlap one...

The invention discloses an apparatus for regulating winding tension as function of bobbin (2) diameter in a slit film tape or yarn (1) winder system carrying at least one automated winder. It comprises a dancing arm (3) equipped with a tension setting means or device (3B) which regulates the yarn tension. The invent...

In a method for producing bags from a woven fabric tube (1) the flat woven fabric tube (1) is fed from a tube unwinding apparatus or a tube forming apparatus to a cutting device in which the woven fabric tube (1) is cut to length along a cutting line (8) to give tubular bag bodies (7) which are open at both ends whe...

In an apparatus which is intended for closing bags made of woven fabric and to which tubular bag bodies can be fed comprising an adhesive applying apparatus for continuously applying adhesive in an adhesive bonding region and also comprising a transporting apparatus for transporting the tubular bag bodies through th...

The invention is a warp breakage/end sensing system and a device to detect end of a running yarn on a CWM used to make endless tubular fabric. The device of the invention incorporates a mechanism which causes a notification in the form of a signal (indicating yarn breakage or yarn end) to be sent to the loom operato...

Invention, it discloses a block bottom bag to which gripping elements are affixed for the purpose of lifting/handling of bags. Gripping elements are made out of gripper strips which are sheets or strips of durable fabric. Gripping elements may also be made out of a bag closing element that is pleated up in shape of ...

The present invention relates to a system and a method for accurately estimating the thickness of extruded plastic films. In particular, the invention relates to automatic allocation of a recipe-dependent calibration factor and a scanning system dependent calibration factor to the measured thickness to arrive at an ...

The invention relates to a device for managing defects in a web material on conversion lines. In particular, the device relates to identifying defective sections of web/web material and rejecting the defective pieces before they enter the downstream processes of a conversion line, such as bag making. In a key aspect...

The present invention discloses a system to monitor breakages in a winder system for slit film tapes. More specifically, the invention discloses a method of identifying the tape breaks in multi-winder machine like extrusion tape-line or mono-filament line to alert operators for mending them. Further, the present inv...

The invention relates to an automatic turret type yarn winding device. The invention provides a device and a method to position spindle precisely in turret type automatic winder, during the bobbin changeover. It involves, during the bobbin changeover process, the step of rotating the turret in at least two discrete ...

Circular looms used to produce woven fabric employ shuttles that carry wound bobbins. Pressure generated by the pressure pad assemblies of the shuttle leads to damage to the pressure pad liner and the yarn resulting in loss or productivity and poor quality fabric. Shuttle pad assembly (SA) of invention has a pressur...

This invention relates to process and apparatus for making bags from polymer web materials, in particular polyolefines using adhesive bonding. It is well known that hot air welding/seaming systems used in such processes cause undesirable and uncontrolled deterioration in fabric strength. The invention discloses a pr...

The invention relates to manufacture of storage sacks made from tubular fabric and in particular to a device or an apparatus of and method for making multi-component sacks where packing sacks have an inner web inserted into them and joined together at the open end of the multi-component bag. In particular, the inven...

The invention discloses circular loom to make plain weave woven fabric which is provided with reduced-friction warp guide elements to achieve high speed weaving. The circular loom is fitted with shed forming warp end guide (3) provided with an upper end portion (3A), a lower end portion (3B), and a middle portion (3...

A circular loom to manufacture doup fabric (F) operating at achieve high speed weaving is disclosed. Conventional looms are faced with problems of undesirable friction at such speeds. The loom comprises a partial healds belt assembly which facilitates displacement of the interacting warp threads is provided on the l...

During bonding process of labels and workpieces, which are made from thermoplastics, they are heated to 350+ oC before actual bonding. Effect of high temperature and thinness of surfaces causes thermal shock on the materials to be bonded, leading to product failure or quality issues. A device 1 to apply labels onto ...

The invention relates to an apparatus and a method for controlling yarn winding tension in a winder system by reducing variations or fluctuations in thread tension during winding operations. The plurality of dancer arms (3) of the winding system are each provided with a tensioning device, which in turn has at least ...

An apparatus and a method for changeover of unwinding rolls (29, 30) of fabric (28, 28A) is disclosed. The apparatus comprises a main frame (1), a slidable frame (11) and at least two platforms for fabric rolls (24, 24A). Main frame (1) is equipped with guide rollers (6, 7, 8) to guide path of unwinding fabric. A p...

The invention describes a cutting apparatus having a semi-automatically replaceable cutter rail (7) and semi-automated method of replacing it. The apparatus comprises a vertical frame (2) affixed to floor, a horizontal frame (3) affixed to said vertical frame (2) near its top end, a vertical guide rail (4) affixed ...

An apparatus and a method for cutting a moving web (2) of woven sheet material is disclosed. The key components of the apparatus are a pre-draw roller assembly (9) and post-draw roller assembly (11); a cross cutter apparatus (7), mounted at an angle between said roller assemblies (9, 11), and having a moveable kn...

The invention discloses system and method to measure thickness of polymeric coatings fabrics using measuring gauges and adjust it as necessary. The system employs scanners (5, 5) for measuring the thickness of coatings. The scanners scan the thickness of the coatings (4, 4a) or coated fabrics (2, 3) and assesses whe...

The invention discloses an apparatus and method to measure width of moving fabric accurately. The apparatus comprises a pair of angular position measuring sensors, namely a first angular position measuring sensor (2) and a second angular position measuring sensor (2a), each of which is supported by a corresponding m...

The invention relates to an apparatus and a method for opening ends of tubular web pieces (2) to make squared or block bottoms. Apparatus comprises an end-opening device (7), two rotating differentials (22, 26) positioned angularly to the plane of web pieces (2). Each differential (22, 26) has a shaft on which a pai...

Yarn breakage due to splitting of yarn filament is a major issue with industrial bag-making. The invention discloses a sewing thread lubrication apparatus provided to lubricate the sewing thread prior to using it on a sewing machine. It comprises a sewing thread supply station where reels of sewing thread are positi...

The invention relates to manufacture of storage bags made from tubular fabric and in particular to a device or an apparatus of and method for making composite bags where storage bags have a liner inserted into them. Manual methods of inserting a liner into an outer covering to make composite bags are known, however...

The invention discloses a method for producing a storage bag with an integrally formed valve, a resulting bag and an apparatus for producing such a bag. The method is characterised by forming the valve (3) of bag (2) by folding corner (13) of the tubular piece (5) at second open end (8) inwardly to the inside fol-...

The invention discloses a circular loom deploying a control lever and the plate/cam mechanism to control the movement of partial healds (2A, 2B). It comprises at least one control lever (C), positioned perpendicularly to central shaft (12). The control levers (C) have two integrally connected arms or levers – a powe...

The invention relates to a semi-automated liner insertion device and a semiautomated method of inserting a liner cut piece into an outer covering to form a combine (6). The semi-automated device comprises a height adjustable frame (10) on which a semi-automated liner insertion platform (1) is mounted and which is ...

An apparatus and method to decontaminate polymeric material composition with a multiple melt filtration system are disclosed. The apparatus (1) comprises an extruder frame (13); an extruder drive unit (4); a material hopper (2) mounted on an extruder unit (3); an extrusion barrel (10) connected to the extruder un...

The invention discloses a circular loom and a method for producing regulated weft pattern fabric where the weave density of weft yarn may be varied. It also discloses a fabric that has congestion zones (28) at predetermined locations. The main motor (1) drives the main drive (2) and a haul-off motor (15) drives a fa...

A Circular Loom, A Method To Make Tubular Woven Fabric Of Composite Weave, And A Tubular Woven Fabric Of Composite Weave The present invention relates to a circular loom and a method for manufacturing of a tubular woven fabric of composite weave using a circular loom, and a fabric of composite weave, i.e. a combi...

Invention relates to guiding apparatus (16) for running yarn in a circular loom. It comprises a creel support (5) to mount yarn bobbins, a central shaft (20) connected to bracket (19) and front guiding unit (17) and rear guiding unit (18) connected together via block (19) and a pair of support brackets (4) having...

The discloses a transferring system and method for transferring cut pieces of web material around corners used in conversion of web material rolls into piece goods such as bags. The apparatus allows the cut pieces (3) to be grabbed by the grabbing clamp (7) and transferred by a transportation unit (4) such that i...

The invention describes an apparatus and a method for producing a bag made from fabric which may be woven fabric, non-woven fabric, optionally coated or laminated, with integrally formed bottom and a bag that may be block-bottom type, may have a valve, or may be of pillow type and easy to close after filling. The ap...

The invention discloses an apparatus and method of drying of polymeric film. In one characterising feature of the inventio at least a pair of air dryers (18) are installed after the quench unit, or a water tank (3), such that these are far from it and the film get enough time to get dried before entering into the n...

The invention discloses a side gusseted bags with a valve and an apparatus and method of producing it. The apparatus has a web puller unit (A), a first cutting unit (B), a first folding unit (C), a first sealing unit (D), a conveying unit (E), a second cutting unit (F) having a first and second cutting blade (15, 15...

The Invention relates to an apparatus and a method for quenching an extruded plastic film. Solidification and cooling of the extruded molten film (1) is done with the help of water as the preferred quenching medium stored in a tank unit (2) and continuously circulating through the cooling device to maintain its c...

The invention discloses an apparatus and a method for transporting cut piece in the direction of their longitudinal axis followed by gradually changing the direction of their transport transversely to the longitudinal axis. The invention disclosed has one longitudinal transport device (2), one cross transport device...

Apparatus and method for thermo-mechanical treatment of monoaxially oriented thermoplastic tapes is disclosed comprising a top and a bottom chamber (2, 3), with a channel (4) situated between the chambers for carrying moving web strips (5) in longitudinal direction. Each of top/bottom chambers (2, 3) have at least o...

An apparatus and a method for removal of moisture content from the material being processed for making an extruded film on a raffia tapeline using dehumidifier based air drying system (B) is disclosed. The dehumidifier air drying 10 system (B) comprises a drying unit (11) and a dehumidifier unit (15). The drying ...

The invention discloses an apparatus and a method for indirectly measuring fabric roll diameter and sending a notification when specified diameter limit has been reached during unwinding of a roll. The apparatus comprises a deflection sensing unit (7), overlay (or follower) belt (3) and dead weight (4). An inductive...

A cutting device (7) and method for cutting of moving web of sheet material is disclosed. It comprises a blade (30) enclosed in a front cover (12) and having its cutting edge oriented vertically and that a top edge of said cutting device (7) is mounted at an angle of inclination (0) with the horizontal. An adjustmen...

The invention discloses a traverse mechanism (6) housed inside a cambox (4) and having a traverse guide (5) and a yarn stopper (9) and a method for yarn transfer. The traverse guide (5) has a planar body comprising a stem (5k), a right wing (5a) and left wing (5b) having a lip (5e), said wings (5a, 5b) having convex...

Apparatus, method for hemming edges of tubular bag of woven fabric of PE/PPE or HDPE material involving opening, folding, and thermally fusing edges at a cut end of a tubular bag (1) made from woven fabric, and a tubular bag. The apparatus comprises a pre- opening unit (F), a mouth folding unit (G), and a thermal...

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5 The present invention discloses an improvement over the Indian Patent no. 357944 and relates to a woven fabric (1A) and method of manufacturing the same. It discloses a woven fabric(1A) having warp threads (1B) and weft threads (1C) respectively in warp direction and weft direction. The plurality of yarns ali...

The present invention relates to apparatus and method for separating the unprocessed bags in an automated bag making machine and eject them to the ejection unit (6). The apparatus has a bag ejection unit (1) consisting of an overhead cover (13), a swivel frame (9), an ejection bin (6), a motor (12), and a second...

ABSTRACT APPARATUS AND METHOD FOR SEALING END OF A BAG 5 The invention discloses an apparatus and a method for sealing end of a fabric. The apparatus comprises an unwinding unit (1) for mounting fabric roll (2), a first driver roller (3) for unfolding said fabric roll (2), a punch assembly (4) having a floating...

5 A cutter assembly (3b) and a method to cut moving tubular flat fabric (4) into two fabric layers (4a and 4b) through longitudinal smooth cutting is disclosed. The cutter assembly (3b) incorporates a linear bush (19) at its two ends. The linear bush (19) comprises an aluminium housing equipped with an array of...

The present invention relates to a deformity detection system (4) and a method for detecting the deformities (2) in online web materials and managing them on the web-processing lines. Such web processing line along with deformity detection system may comprise of data transmission (5) to cloud (3) which may includ...

Apparatus (3) and a method for the formation of crease on the already formed triangular folds at the ends of a tubular fabric piece for manufacturing of semifinished box bags or block-bottom bags is disclosed. It comprises at least one pressing roller (3a) and a plurality of support roller (3b) arranged tangential...

An apparatus and a method for opening the ends of tubular web pieces (2) to make squared or block bottoms is disclosed. The apparatus comprises a pre-opening device (1A), upper and lower plates (21, 22) adjustable with a knob (6) to create a flexible opening (23) through which a cut tubular web piece (2) of wide ...

The invention discloses a device and process of controlling/stabilizing tension in a filament/monofilament, flat/fibrillated tape or yarn while winding it on a core in a winding machine. More particularly, it discloses a multistage tension control device to precisely control the tension in winding of low denier y...

Invention discloses a method for making polyolefin multifilament yarn mimicking natural wool on a single melt-draw-spin machine and a multifilament yarn/fiber mimicking natural wool. The key steps of the method include said feeding the raw material into an extruder to convert them into a fluid melt, passing the s...

Invention discloses a method for making polyolefin multifilament yarn mimicking natural cotton on a single melt-draw-spin machine and a multifilament yarn/fiber mimicking natural cotton. The key steps of the method include said feeding the raw material into an extruder to convert them into a fluid melt, passing ...

The invention discloses an improved reed ring assembly (1a) comprising and upper reed ring (2), and a lower reed ring (3) between which sets of improved reed bars (4a) and improved reed strips (5a) having a humped profile (14) at one end and scooped profile at the other end are arranged angularly. Improved reed ...