Abstract:
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 pierce the bag fabric, often in uncontrolled manner, leading to pilferage, damage to bags and goods and affects durability. There is a need to provide bags that, when filled, are easier to handle manually without problems of pilferage, storage, and handling, and may be made using simple and automated technology. The invention discloses a storage bag made from woven or non-woven fabric and provided with an appendage that is bonded to the bag and which serves as a handle to facilitate handling and lifting of the filled bag. The invention ensures that pilferage of the stored goods and damage to the bag itself from improper handling is significantly reduced.
Abstract:
The present invention discloses a multi-layered tape slit-film tape made from polymer resin and inorganic fillers, comprising at least one central layer with a high proportion of inorganic filler, preferably a commercially available calcium carbonate masterbatch and external layers with high proportion of polymer resin, preferably polyolefin. The invention also discloses a process of and apparatus for making such slit film tapes. The slit film tapes of the present invention have adequate mechanical and thermal properties for use in slit film tape woven fabric industry and are more economical than the existing slit film tapes that are used for the same purpose. The multilayer slit film tapes are found to be devoid of drawbacks such as excessive inorganic dust, the consequent wear and tear of the machinery, and hazard to human health, resulting from the use of the currently available monolayer slit-film tapes that use inorganic fillers.
Abstract:
The present invention is a part of a yarn transfer system used for transferring yarn (3) from a full bobbin (9) to an empty bobbin (4) typically fitted on a winder frame. The invention broadly comprises a yarn traverse device (2) used in transferring a continuously arriving yarn (3) onto an empty bobbin (4) for commencing of winding process during bobbin changeover process in automatic turret winder without any stoppage. This is achieved with the provision of an actuation device (5) that facilitates axial movement of the yarn traverse device (2). In the present invention, during the bobbin changeover operation, the yarn traverse device (2) is moved axially through the actuation device (5) and allows the traverse guide (7) -while maintaining its normal traverse speed at all times- to move beyond the normal yarn winding zone (6) such that the advancing yarn (3) is within the reach of the yarn grasping device (14) of the ready-to-be-wound empty bobbin (4). After the yarn transfer is completed, the traverse device moves back to the normal winding zone (6).
Abstract:
The present invention relates to automatic turret type winders used for laying a continuously arriving yarn ( 3 ) around a rotating bobbin while traversing the yarn. It further helps in improving yarn transfer efficiency of continuous advancing yarn during the bobbin changeover operation. The present invention comprises a traverse guide (5) of a novel design which ensures that advancing yarn is transferred successfully to the bobbin (2) even when the yarn is not precisely transferred back to the traverse guide.
Abstract:
The mechanism uses a set of pulleys and belt drives to apply pulling force to the fabric advancing through the sewing zone of a sewing machine. As the pulling device is linked to the feeder mechanism that feeds the article needing stitching to the sewing area, the fabric pulling speed is synchronised with the feeding speed of the advancing fabric. This ensures that there's no undesirable or excessive pulling while at the same time the article being stitched is kept in a desirably taut state so that the seam formed is without any flaws such as pleat formation.
Abstract:
The present invention relates to a traverse guide of a novel design and construction and a transfer link that together transfer the advancing yarn to a grasping device and, once it has been grasped, back to the traverse guide. The transfer link shifts the advancing yarn from the traverse guide while still positioning the yarn within a virtual controlled zone within which the yarn stays until it is grasped by the grasping device, where after, during the return stroke of transfer link, the advancing yarn is placed back into the traverse guide so that yarn can be uniformly wound on the bobbin.
Abstract:
The present invention relates to a traverse guide of a novel design and construction and a transfer link that together transfer the advancing yarn to a grasping device and, once it has been grasped, back to the traverse guide. The transfer link shifts the advancing yarn from the traverse guide while still positioning the yarn within a virtual controlled zone within which the yarn stays until it is grasped by the grasping device, where after, during the return stroke of transfer link, the advancing yarn is placed back into the traverse guide so that yarn can be uniformly wound on the bobbin.
Abstract:
The mechanism uses a set of pulleys and belt drives to apply pulling force to the fabric advancing through the sewing zone of a sewing machine. As the pulling device is linked to the feeder mechanism that feeds the article needing stitching to the sewing area, the fabric pulling speed is synchronised with the feeding speed of the advancing fabric. This ensures that there's no undesirable or excessive pulling while at the same time the article being stitched is kept in a desirably taut state so that the seam formed is without any flaws such as pleat formation.
Abstract:
The present invention is related to operations where a fabric (1a) or a bag made from it is folded before it's either stitched or heat welded into a seam. The present invention provides a device that forms a double fold in flexible sheet materials (1a) in a single continuous automated process. The device accepts the running sheet material which passes through an arrangement of mechanical parts such that the double-fold formed is of uniform width, without irregularities such as creases, and operates independently of type of fabric. This facilitates effective stitching or sealing of the fold and in turn a more effective seam or a joint. The invention is useful in making double folds in any flexible sheet material or fabric such as those used in the garment industry or in paper product industry, or the sheet rubber or sheet plastic industries and similar other industries.
Abstract:
The invention relates to a method for producing oriented slit film tapes, comprising the following steps: extruding melt polymer through a die (2); simultaneous quenching and melt-drawing of the molten polymer in the cooling device to form a film sheet (3); slitting the initial film sheet into a plurality of relatively narrow slit film tapes (4); stretching (8) at elevated temperature, by passing the slit film tapes through a heating medium (7) at a temperature just below the softening temperature of the slit film tapes; y annealing and cooling the oriented slit film tapes (10, 11); winding the slit film tapes (13); characterized in that before the stretching step, it has a stage of pre-stretching (108) made by passing the slit film tapes through one set of heated holding rollers (107) turning at a given speed and one set of cooled pre-stretch rollers (109) turning faster than the heated holding rollers, wherein at least one of the rollers of the set of holding rollers is heated and at least one of the rollers of the set of pre-stretch rollers is cooled. The invention also relates to an apparatus for performing this method and to the products obtained by said method.