Abstract: The present invention relates to a prestretched polyethylene film having a longitudinal stretch ratio of from about 1:2 to about 1:4 and having a longitudinal elongation capability of at least 170%, said elongation capability comprising an elastic component. The invention also relates to a method for producing said film and to a method of wrapping compressed bulk material such as a round bale using said film, the method comprising further stretching the prestretched film and applying the film around the compressed bulk material in direct contact therewith. The film according to the invention may be used as a net replacement film and allows increasing the efficiency and the economics in the baling process by allowing faster baling, use of a lesser amount of wrapping film and/or improved protection of the product.

Abstract: A supply air plenum for more efficient heating and cooling includes a shell that defines an interior space. The shell comprises a first section and a second section. The first section has a bottom that is open and is configured to couple to an air handler so that the interior space is in fluidic communication with the air handler. The second section is coupled to and protrudes from a first side of the first section. A plurality of tubes is coupled to and extends from the second section of the shell. Each tube is configured to couple to a respective return conduit of an air supply system of a structure. The tubes are configured for intake of air from the structure through the interior space to the air handler.

Abstract: A machine for forming the shed of a weaving loom, of the dobby or cam machine type utilizes output levers performing, during the weaving, an alternating oscillation movement around another common shaft, a casing (12) with an output aperture crossed by the levers, as well as a frame (6) which delimits, with the casing (12), an inner volume (V) of the machine, including an area for receiving torque transmission members between a driving shaft and a shaft for actuating the output levers as well as an area for receiving the output levers, this receiving area being adjacent to the area for receiving the torque transmission members, while the frame (6) supports the actuation shaft. The casing (12) and the frame (6) are in sealed contact, via at least one seal gasket (16, 18), at both external (16) and internal (18) seal barriers (B1, B2) respectively distant from each other, both seal barriers each extending over the whole periphery of the casing (12) except at the output aperture.

Abstract: There is provided a bulkiness recovery apparatus for nonwoven fabric, the apparatus being for recovering bulkiness of the nonwoven fabric by blowing hot air to heat the nonwoven fabric. The apparatus includes: a conveying section that conveys the nonwoven fabric along a conveying direction, the nonwoven fabric being continuous in the conveying direction; a heating section that heats the nonwoven fabric by blowing the hot air to the nonwoven fabric being conveyed; a width sensor that measures a widthwise dimension of the nonwoven fabric at a position downstream from the heating section in the conveying direction, and that outputs information concerning the widthwise dimension; and a controller that controls at least either one of the heating section and the conveying section based on the information that has been output from the width sensor.

Abstract: A device and method for excellent recovery of bulk in nonwoven fabric. While nonwoven fabric is transported so as to enter a heating chamber via an entry opening and, after progressing within the heating chamber, exit the heating chamber via an exit opening, heated air is supplied at a speed higher than the transport speed for the unwoven fabric so as to enter the heating chamber via the entry opening and after progressing within the heating chamber while contacting the nonwoven fabric, exit the heating chamber via the exit opening.

Abstract: A stretching assembly for cloth has a heating furnace, a pressing device and a shaping device. The heating furnace has two opposite sidewalls and a channel. The channel is formed through the opposite sidewalls of the heating furnace and has an inlet and an outlet. The pressing assembly is set to face the inlet of the heating furnace and has a first pressing wheel and a second pressing wheel. The first pressing wheel has multiple annular protruding segments formed on an external surface of the first pressing wheel. The second pressing wheel parallel the first pressing wheel to form a curved clearance between the pressing wheels and has multiple annular concave segments formed on an external surface of the second pressing wheel. The shaping device is set to face the outlet of the heating furnace, aligns with the pressing device and has two shaping wheels.

Abstract: A method of forming a fabric is provided. The method includes the step of providing a plurality of yarn and batching the yarn on an A-frame so that the fabric is formed with a width greater than 102 inches and with a twill weave with a satin face. Also included is the step of passing the fabric across a plurality of rolls that have a rough surface and that apply compression to the fabric. The steps of applying fabric to a tenter frame and heating of the fabric is also included. The present invention also provides for a fabric in certain exemplary embodiments.

Abstract: An inflatable element in the form of a tension tube, and method of making same. The method involves forming a tube by a knitting process, then heatsetting the tube whilst simultaneously maintaining it under lengthwise tension. The tension in the tube is maintained during cooling of the tube. An option relaxation stage may also be included.

Abstract: When a heat treatment device for heating synthetic fiber filament yarns by saturated steam is installed to a drawing and texturing device for synthetic fiber filament yarns, in order to lower the total height of the devices than a conventional one, cylindrical hot pins each having a heat-absorbing part and a heat-discharging part are formed integrally with the bottom surface of a laterally extended container for sealing saturated steam of heat medium liquid in such a fashion as to penetrate through the bottom surface from inside to outside of the container with axes of the hot pins extending in a vertical direction, and the level of surface of the heat medium liquid within the boiler connected with the container is disposed at a position lower than the inside bottom surface of the container.

Abstract: In processing web material, the material is passed through a guiding arrangement which has a plurality of guide elements. In order to enable removing the guide element for repair without disturbing the web material, each of the guide elements is provided with a lifting arrangement which is concentric to the guide element and is movable from one angular position withdrawn from the path of the elongated material engaging the guide element to a second position lifting the elongated material off of the guide element so that the guide element can be axially withdrawn from the machine.

Abstract: A method of relieving stress in a window covering or other fabric composite by providing a fabric composite including first and second sheets of sheer material coupled to each other by a plurality of vanes. The fabric composite is fed along a pathway, and tension is applied to the fabric composite in directions both substantially perpendicular and substantially parallel to the pathway. The tensioned fabric composite passes adjacent to a plurality of heating units which apply heat to the window covering, removing creases and imperfections from the fabric composite. The tension is then removed from the fabric composite in the directions both parallel and perpendicular to the pathway.

Abstract: The invention concerns an improved method of heating or tempering foils and an associated device including an arrangement for measuring the temperature, based on the following features: a separate arrangement is provided for heating the foil edges; the foil edge heating arrangement comprises an infrared radiator device (21) and a hot air heating device (29); and the infrared radiator device (21) and the hot air heating device (29) can be controlled or set at different heating output values.

Abstract: An apparatus for producing high quality products of cloth strip by the improvement of working efficiency and the equalization of treatment conditions, wherein the cloth strip (2) is subjected to a predetermined treatment while passing through one treatment zone (3) along a spiral path. A plurality of metallic surface rollers (5-2 to 5-4), surfaces of which are formed with metal, are used as at least part of conveying rollers consisting of metallic rollers (5-2 to 5-4) for guiding the cloth strip (2), provided in at least one of entrance and exit parts for the introduction/withdrawal of cloth strip (2) to the treatment zone (3). The metallic surface rollers (5-2 through 5-4) are arranged in a non-contacted state with each other and positively driven to rotate via a suitable drive mechanism (6).

Abstract: In a method and an apparatus for treating tubular knitted goods containing elastomeric fibers, the goods are effectively relaxed, expanded, and heat fixed or set in the desired expanded condition, while maintaining the tubular configuration of the goods and without cutting open and re-sewing the tubular configuration of the goods. The tubular knitted goods are continuously transported through a relaxing process followed by a heat fixing process and then a cooling process, while constantly maintaining the tubular structure of the goods. The goods are expanded in the radial or width direction by a tubular expander, and in the lengthwise direction by being transported between a feed roller arrangement and a draw-off roller arrangement operating at different transport velocities respectively. The temperature in the heat fixing chamber is preferably over 200.degree. C. and the transport velocity of the tubular knitted goods can be greater than 18 m/min.

Abstract: A finishing assembly which includes an outside treatment roll for treating both sides of an endless web without having to remove, turn inside out and reload the endless web onto the finishing assembly. The outside treatment roll is movable and adapted to contact the endless web within an opening defined between a pair of cantilever beams such that the "minimum loop length" of the endless web is preserved. The finishing assembly includes a movable non-contacting treatment assembly which is adapted to be arranged between the cantilever beams such that the non-contacting treatment assembly may be used with or without the outside treatment roll to facilitate different finishing processes. In addition, the finishing assembly may include a pivotable cantilever beam in place of one of the cantilever beams. The pivotable cantilever beam may be rotated out of the finishing assembly, further minimizing the "minimum loop length" of the endless web.

Abstract: A finishing assembly which includes an outside treatment roll for treating both sides of an endless web without having to remove, turn inside out and reload the endless web onto the finishing assembly. The outside treatment roll is movable and adapted to contact the endless web within an opening defined between a pair of cantilever beams such that the "minimum loop length" of the endless web is preserved. The finishing assembly includes a movable non-contacting treatment assembly which is adapted to be arranged between the cantilever beams such that the non-contacting treatment assembly may be used with or without the outside treatment roll to facilitate different finishing processes.

Abstract: An apparatus for treating a cloth strip comprising a treatment zone with an entrance and exit for the cloth strip. The cloth strip is treated while running along a predetermined spiral path through a treatment zone. A plurality of conveying rollers are provided in the treatment zone. The conveying rollers have portions which are fixed to a rotary shaft and portions which are loosely connected to the rotary shaft such that the loosely connected portion may rotate about the shaft.

Abstract: A fiberglass mesh process includes coating fiberglass yarn, conveying the coated yarn to a loom without first beaming the yarn, weaving a mesh fabric of said yarn, conveying the mesh fabric to an in-line fabric treating station from said loom, tentering the fabric, slitting the fabric and rolling the fabric. The tentering step includes conveying the fabric through a nip of heated, counter-rotating rollers or heated bars oscillating across the moving fabric.

Abstract: To incline piles of plush ribbons in a diagonal direction, the plush ribbons moistened at a predetermined rate are brought into contact with a heating drum in a longitudinal direction of the plush ribbon while twisting the plush ribbon about a longitudinal axis thereof. Thereafter, the plush ribbons are helically wound around the heating drum while rotating the heating drum at a peripheral speed different from a feeding speed of the plush ribbon.

Abstract: Telescoping slot nozzles for use with a rail assembly are disclosed. Each nozzle includes a fixed portion and at least one telescoping portion slidably guided in the fixed portion. Metal-to-metal contact in the nozzle is avoided, thereby allowing the nozzles to operate at high temperatures. The configuration of the nozzle discharge opening can be easily modified to form an air knife, depending upon the particular application. Each nozzle is independent of the others, thereby facilitating retrofitting existing ovens and maintenance of individual nozzles.

Abstract: A stretching machine for treating removable belts supported on rollers, such as felts and wires in papermaking machines, comprises two rollers, over which the belt is trained in a loop. A heated belt contact structure has a contact surface adapted to contact the belt on the outside of the loop and between the rollers. A press roller is adapted to make press contact with the belt on the inside of the loop opposite the belt contact structure. The belt contact structure comprises a glide contact surface and a roller, the press roller acting against this latter roller.

Abstract: Light-trapping members are cut out of a ribbon consisting of a base fabric and piles. The piles of the ribbon are pressed against the peripheral surface of a thermal drum to be inclined in the width direction after the ribbon is passed through and twisted by a twister disposed close to the thermal drum. The light-trapping members with inclined piles are attached to a film passage mouth of a self-advancing-type photographic film cassette with the inclination of the piles directed to the outside of the film passage mouth, so that the leading end of a photographic film can be advanced smoothly by rotation of a spool through the light-trapping members to the outside of the cassette.

Abstract: A pair of stretching pulleys are rotatably mounted on a pair of support plates within a housing. A belt is wound around the upper part of the stretching pulley and a number of turn pulleys. A film introduced onto the stretching pulley is held between the belt and the stretching pulley and is transferred. Air flow generated by a fan and heated with a heater is blown against the film through a louver and circulates through bellows mounted to the housing to return to the fan. The stretching pulley is partially cooled in a water bath. The support plates are rotatably connected to screw shafts, thereby changing a distance and angle between the plates. The stretch width or stretch ratio of the film is thus adjusted with the change of the distance and angle.

Abstract: A method of and apparatus for continuously stretching a thermoplastic web comprises the steps of feeding the thermoplastic web longitudinally to a heating chamber at a relatively low input speed, engaging the thermoplastic web in the heating chamber with a first member with a relatively low sliding friction between the web and the first member and engaging the thermoplastic web in the heating chamber with a second member spaced longitudinally downstream from the first roller with a relatively high sliding friction between the web and the second member. The thermoplastic web is pulled off the second member in a downstream stretch of the web at a relatively high stretching speed and the web is heated in the chamber to a temperature sufficient to substantially prevent plastic-deformation stretching of the web upstream of the second member.

Abstract: In setting a web, e.g. a wire sieve or felt in a heating and setting plant, air of a desired temperature is blown towards said web. The air in the air box is heated to a desired starting temperature, the air meanwhile being redirected to circulate in the air box without flowing towards said web to any substantial degree. When the air has reached the starting temperature, it is redirected to be blown towards the running web. This procedure may be repeated as desired until the web is set as desired.A setting plant for setting webs comprises an air box with two portions between which the web may run. At least one portion of the box acting as an active box portion, comprises equipment for air treatment.

Abstract: A covering device for the inlet and outlet slots of a tenter comprises a flexible plastic strip whose ends are fastened in the region of the ends of the respective slot. In the area where the chain rail guides extend through the slot, the plastic strip is deflected in U-shaped configuration by deflector elements outside the slot and spanning the chain guides. The deflector elements are angularly oriented relative to the longitudinal axis of the slot at an angle of about 45 degrees and are fastened on a movable carriage connected to the chain guides so that movement of the chain guides transversely of the slot functions also to move the U-shaped configuration of the flexible plastic strip.

Abstract: Sheet of polyvinyl butyral is extruded, it is subjected to a humidifying and relaxation treatment by maintaining it stretched between rollers, the sheet of polyvinylbutyral is passed through a cold zone, in particular around cooling drums, so as to fix it, the sheet is rolled under a given tension, and prior to fixing the sheet in the cold zone, the sheet is allowed to form at least one free loop.

Abstract: A fabric, useful as a primary carpet backing, woven in both the warp and weft directions from filmy elements in the form of longitudinally-oriented, splittable ribbons formed from a blend of a major amount of polyester and a minor amount of a polyolefin. The ribbons split longitudinally when punctured by a tufting needle, thus providing for a more secure grip on the tufted carpet yarn than that given by conventional polyester backings. The use of polyester as a principal component overcomes certain drawbacks of polypropylene backings. Alternative processes for making these fabrics, each involving a heat-treating step at a temperature of at least 150.degree. F. (66.degree. C.) for a sufficient period of time to render the ribbons splittable, are also disclosed.

Abstract: This invention relates to a device for drying, by micro-waves, the selvedge of an advancing flat material, particularly textile material, wherein it comprises a preferably rectangular waveguide of which one end terminates in a short circuit and the other by a bend for connection to the generator. The outer part of the bend, the contiguous face of the guide and the short circuit are provided with a single slot made along the median plane, through which is introduced the selvedge of the material inside the guide. The face of the guide opposite the slot comprises orifices connected via a chamber to a source of suction. Two lips, parallel to each other and to the median plane extend on either side of an all along the slot; their ends form a slight flare. These lips form a quarter-wave trap and facilitate introduction of the selvedge into the guide.

Abstract: A film stretching machine with tentering hook chain tracks extending through several consecutive processing zones is constructed of preassembled standardized exchangeable structural groups permitting a modular type of construction. These structural groups include venting cells of the same kind which are fully pre-equipped and are arranged along the left and right edges of the film web to be stretched. Exchangeable blower boxes with nozzle fingers or arms having a standardized width are installable between opposite venting cells of a processing zone. The dimensions of the venting cells are matched to the dimensions of typical shipping containers in order to achieve efficient packaging possibilities. The length of the venting cells advantageously corresponds to two or three times a standard spacing of adjustment spindles used for adjusting the spacing of the tentering hook chain tracks. The width of the standardized blower boxes may vary stepwise by twice the width of the venting cells.

Abstract: A process of stretching tubular nets or plates made of extruded plastic material according to one or two directions at right angles to each other and an equipment for carrying out the same wherein said process consists in dipping the tubular net or plate into heated water, in causing it to be fitted on a substantially flat and wedge-shaped means, dipped into heated water too, and in cutting said net or plate close to at least one of the sides of said wedge-shaped means; and wherein said equipment consists of a substantially flat and wedge-shaped means disposed on a bearing casing and defined by a plurality of driving and idler pulleys disposed symmetrically two by two with respect to a vertical median plane of the equipment, in order to substantially define a wedge, said pulleys being drivingly connected to each other by at least a driving belt.

Abstract: When longitudinally stretching thermoplastics films in a stretching zone comprising at least one roll by the application of a stretching force thereto, width contraction of the film generally occurs. In the present invention, this is prevented by the improvement of directing compressed air against the film while it is passing over at least one of the rolls and is being stretched longitudinally. The compressed air emerges from nozzles distributed over the entire length of the rolls and retains the film in position on the roll or rolls, thereby preventing its width from contracting. The improved apparatus suitable for carrying out the improved method comprises nozzle means disposed adjacent to and directed towards the film located on the roll means and compressed-air supply means communicating with the nozzle means.

Abstract: An assembly for treatment of an endless wire or felt which passes around a support roll comprises a transversely elongated support frame, rails, means at each end of the frame for movable support of the frame on the rails into and out of a surrounding position in relation to the support roll, and a roll which is transversely disposed within the frame, as well as means for holding the roll in the frame in such a position within the frame that at a first surrounding position of the frame in relation to the support roll the frame roll obtains contact with the felt on the support roll and at a second surrounding position of the frame in relation to the support roll the frame roll obtains contact with a free section of the felt adjacent the support roll. The roll on the frame can be heated and has a drive motor for rotary movement of the roll about its longitudinal axis.

Abstract: An apparatus for processing an endless web includes means for supporting the endless web at a first location and a roll for supporting the endless web at a second location. The roll has first and second ends. First and second carriages are engaged to first and second substantially parallel tracks respectively for rotatably supporting the first and second ends of the roll respectively in a normal operating position and for moving the roll relative to the support means along the tracks. A bridge connects the first and second carriages. Means are mounted to the bridge for lifting the roll at a location between the first and second ends, whereby the roll is supported by the lifting means and the first carriage, whereby the endless web may be inserted or removed over the second end of the roll.The lifting means includes a cradle for supporting the roll, means for moving the cradle into and out of a position underneath the roll and means for elevating the cradle while the cradle is in the position under the roll.

Abstract: The present invention is an apparatus for biaxial orientation of precrystalline polyacrylonitrile polymer sheet consisting essentially of a machine direction orientor which stretches the sheet in the machine direction a transverse direction orientor which stretches the sheet in the direction 90.degree. to the machine direction, both processes of which may be completed rapidly in a heated essentially aqueous environment.

Abstract: A method and device for longitudinally stretching polymeric film, characterized by the strict isolation of the tensioning operation from the heating and the cooling operations of the film, by the symmetrical heating and cooling of the film, and by carrying out the heating of the film in two stages, namely preheating by means of diffused IR-radiation, and a full heating, preferably along a line, by means of bundled IR-radiation. The film stretched in this manner meets high standards of flatness and surface quality, and is subject to minimum waste losses and is especially useful in the photographic field.

Abstract: A stretching machine for treating removable belts supported on rollers, such as felts and wires in paper-making machines. The stretching machine comprises two rollers over which the belt is suspended, at least one of said rollers being adapted to be heated. A lifting device is inserted between the heatable roller and the belt, such that the belt can be held raised up from the roller.

Abstract: Relatively inflexible travelling webs, such as carpets or rugs having a coating on the reverse side thereof, are guided in a convoluted path around a plurality of guide rollers, and in this path they are heated by being subjected to steam heat, hot air heat, heat-producing radiation or heat derived from other sources.

Abstract: An apparatus for expanding a laminating interlayer is disclosed. The apparatus includes structure for feeding a heated web of laminating interlayer material to a conical member. A stretching of the web occurs between the feeding structure and the conical member. The web is cooled on the conical member. The apparatus also includes structure which maximizes the yield from the web being stretched.

Abstract: Apparatus for heat treating thermoplastic fabric at the loom is illustrated including an elongated housing extending across the full width of the loom having a passageway therethrough dividing the housing into opposed chambers, one of which carries a heating element and the other, a reflector so that the fabric is heated from both sides, and a gripping means is disclosed for tensioning the fabric in open width as it passes the heater means with a suction device for removing gases and fumes generated by heating of the thermoplastic fabric to elevated temperatures.