Abstract: A process improvement for preparing thermoplastic polymeric film, preferably of polyethylene terephthalate, by extruding a web in melt form onto a quench drum with a surface roughness of at least 3 microinches. In casting webs of less than about 5 mils in thickness the improvement involves drawing the melt to a melt drawdown ratio of less than about 25 and spacing the die lips from the quench roll at less than about 120 mils, preferably 20 to 80 mils. It is also preferred that the flow stability index be greater than 5.

Abstract: Apparatus for forming discrete, shaped interlayer blanks comprises, in combination, an extrusion die containing a slot for forming a sheet from thermoplastic melt, means associated with the die for causing a portion of the melt to exit the slot at a greater mass flow rate than that of the remainder of the melt exiting the slot, means adjacent the die for quenching the sheet immediately after forming and frusto-conical pull rolls for forwardly shaping the sheet into arcuate form, the surfaces of said rolls adjacent the edges of greatest circumference positioned to contact the portion of the sheet formed from the melt exiting the slot at the greater mass flow rate.

Abstract: A stretching device for stretching a tubular film includes a mandrel including a stretching section, a pair of payoff nip rolls disposed upstream of the mandrel and a pair of take-up nip rolls disposed downstream of the mandrel. The stretching section of the mandrel is comprised of a plurality of rings arranged substantially concentrically in spaced-apart relationship in the travelling direction of the tubular film. The outside diameter of a ring on the downstream side is larger than that of a ring on the upstream side. Each of the rings has a plurality of rotating members mounted rotatably, and the plurality of rotating members define an outer circumferential ring edge which is generally smoothly circular.

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: The stretching machine comprises a spinning bar, a blowing compartment, and a stretching chamber. The spinning bar has a plurality of spinning nozzles, from which the individual fibers are put out or extruded in a thermoplastic condition. The blowing compartment is provided with blowing nozzles or orifices through which air is introduced as a cooling as well as stretching means. The stretching chamber has stretching chamber walls which can form an accelerating constriction having a venturi nozzle like shape as seen in vertical cross section. The stretching chamber walls comprise a deformable material, which permits a deformation of the stretching chamber walls during operation. A plurality of adjusting mechanisms for adjusting the shape of the stretching chamber walls are connected to and distributed at various heights over the stretching chamber walls.

Abstract: Apparatus for manufacturing a porous polytetrafluoroethylene material comprising extruding or rolling or a process consisting of the both an unsintered polytetrafluoroethylene mixture containing a liquid lubricant, and carrying out simultaneously next four steps of (a) evaporating a liquid lubricant, (b) stretching the molded articles in an unsintered condition, (c) sintering the same in a stretched condition, and (d) stretching the same in a sintered condition at an atmospheric temperature of more than 390.degree. C. to obtain mechanical strengths such as a Young's modulus of more than 10000 kg/cm.sup.2, and a matrix tensile strength of more than 1100 kg/cm.sup.2.

Abstract: A continuous high speed spin-draw-false twist texturing process for producing a textured nylon yarn having high yarn uniformity is disclosed. The process comprises the steps of (a) melt-spinning a plurality of nylon filaments from nylon polymer; (b) cooling the filaments and combining them to form a yarn; (c) controlling the processing conditions of the nylon polymer of step (a) such that the relative viscosity of the yarn formed in step (b) is at least 45; (d) partially drawing the yarn at a draw ratio of from 2.3 to 3.5 and a temperature of at least 50.degree. C.; (e) simultaneously false twist texturing and further drawing the partially drawn yarn in a draw-false twist texturing zone at a draw ratio of from 1.1 to 1.5; and (f) withdrawing the textured nylon yarn at a speed of at least 1500 meters per minute. The process is particularly useful for the manufacture of textured nylon yarn having a linear density in the range of from about 10 dtex to about 50 dtex.

Abstract: In the manufacture of an optical cable element comprising a tube of plastics material loosely housing at least one optical fibre, a water-impermeable medium in a liquid or semi-liquid state is applied to an advancing optical fibre immediately upstream of an extruder in such a way and under such a pressure that the advancing optical fibre with water-impermeable medium therearound passes into the extruder. After a tube of polymeric material has been extruded around the advancing optical fibre and the surrounding water-impermeable medium in such a way that the internal diameter of the tube is greater than the overall diameter of the optical fibre and the extruded tube has been drawn down and so treated that the molecules are longitudinally oriented, the space in the tube not occupied by the optical fibre is filled with water-impermeable medium of a jelly-like nature.

Abstract: An improved high-speed spinning process for making steam-conditioned partially-oriented polyamide draw-texturing feed yarns involves controlling the wall temperature of the lower portion of a steam conditioning tube independently of the steam flow and temperature in the upper tube.

Abstract: A device is provided for manufacturing an object having a chiralic structure. It comprises, just after the source of formable material, means for twisting the object during drawing thereof followed by coating means and fast-cooling means which allow a part of the twisting stresses thus obtained to be frozen in the structure.

Abstract: An apparatus for forming and producing elongated threads or filaments of synthetic material such as fluorocarbon resins which can be used to form yarns utilizes, a turning machine having, a chuck assembly for mounting a billet of the fluorocarbon resin material therein, and a lead screw assembly with a tool holder assembly thereon. The lead screw assembly is disposed to move a cutting tool in the tool holder assembly longitudinally and parallel to the axes of rotation of the billet so that a plurality of cutting edges on the end cutting face of the cutting tool can cut simultaneously from the billet a corresponding plurality of sized, shaped and dimensioned threads or filaments which can be combined and formed into the desired yarn. Means are provided to synchronize the movement of the cutting tool with the rotation of the fluorocarbon resin billet.

Abstract: An improved process and apparatus for the spin-drawing of high-tenacity, technical-grade yarns is disclosed. The process and apparatus are particularly suitable for use with polyamide and polyester. High quality yarns having a low break elongation are obtained by maintaining the feed roll system at a constant temperature T.sub.E =(T.sub.G -20.degree. C.) to (T.sub.G +65.degree. C.), wherein T.sub.G is the temperature of the glass transition point. Filaments are passed over a roll system disposed between the feed roll system and the draw roll system and driven at a peripheral speed between that of the feed roll and draw roll systems. The filaments are passed over the roll system a maximum of three turns.

Abstract: A control circuit for apparatus stretching a web between intake, discharge, and intermediate pulling stations (20-1, 20-2, 20-3). The circuit includes a first signal generator (32) for providing a signal to the intake discharge station (20-1) corresponding to the desired speed of the web at that station. A multiplier (40) alters the first signal in accordance with the amount of overall stretching, or stretch ratio, desired in the apparatus. The multiplier provides a second signal to the discharge station (20-3) corresponding to the speed of the web at the discharge station necessary to obtain the overall stretching. A second signal generator (48-66) subtracts a selected amount of the difference between the first and second signals from the second signal to provide a third signal to the intermediate pulling station (20-2) that distributes the overall stretching in the apparatus between intermediate zones formed by the adjacent pulling stations.

Abstract: Sheets of organic thermoplastic polymeric film are contacted with processing rolls having a microgrooved surface to reduce the air layer therebetween, thereby aiding heat transfer between film and roll and consequently increasing processing speed.

Abstract: Apparatus is provied for forming an abrasion resistant sheet from a sheet of orientable thermoplastic polymer material in one continuous production line apparatus. Apparatus is also provided for treating the surface of an oriented sheet with heated rolls for creating a fused surface layer on each side of the sheet.

Abstract: An apparatus for continuously extruding, biaxially orienting and forming molded products from a web of thermoplastic material and further, continuously separating the products from the web selvage, stacking and handling the products and recycling the web selvage for further extrusion. The apparatus use continuous molding devices, namely, multiple mold cavities in a rotating polygon configuration over the peripheral surface of which the biaxially oriented web is securely and continuously positioned by a follower roller interfacing the polygon with a biaxial orientation device. Continuous and immediate interfacing is effected to prevent loss of orientation in the web which is kept at a temperature suitable for ingestion thereof into the mold cavities by vacuum, pressure or plug assist. In one preferred embodiment the inertia at the interface between the undulating peripheral surface of the rotating mold polygon and biaxial orientation apparatus is reduced to an optimal minimum.

Abstract: A film stretching unit movably positioned adjacent to an existing calender installation is described which includes a plurality of strecthing rollers having internal rotary joints for circulating a heating fluid therethrough. Alternate rollers are movable vertically without needing to change their rotational speed in order to easily thread the film through the stretching rollers.

Abstract: An improved method and apparatus for forming nonwoven webs by spinning filaments into a quench chamber where they are contacted with a quenching fluid, then utilizing the quench fluid to draw the filaments through a two-dimensional nozzle spanning the full machine width, and collecting the filaments as a web on a porous surface. In contrast with the prior art, low motive fluid pressures can be used, and a non-eductive drawing means utilized to minimize air turbulence and the resulting filament entanglement in the drawing means while maintaining substantially constant cross machine filament distribution. The apparatus and process reduce problems relating to filament breakage and spreading and result in increased productivity and improved web formation. Other advantages include the ability to continuously spin highly pigmented polymer filaments and reduced hazards associates with high noise levels.

Abstract: A system and method are provided for continually preventing filament bridging between adjacent draw nozzles. The system comprises a heating element, generally in the form of a metal heating wire, which is disposed between adjacent nozzles and is positioned in the path of filaments attempting to bridge the nozzles. The temperature is maintained at a level high enough above the melting point of the filaments so that they will continuously and instantaneously melt when they contact the heating element.

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 high speed yarn feeding apparatus for feeding yarn from a yarn supply source to a yarn take-up apparatus is disclosed which is capable of being threaded by conventionally employed suction nozzles. The yarn feeding apparatus employs at least one stepped godet roller having a small diameter portion on which the travelling yarn is initially threaded. A yarn hooking means is provided on the peripheral surface of the stepped side of the large diameter portion of the stepped roller. Means is provided upstream of the stepped roller for shifting the travelling yarn from a position aligned with the small diameter portion to a position aligned with the large diameter portion of the stepped roller. The yarn hooking means can take various conformations and more than one hooking means can be provided on a single stepped godet roller.

Abstract: An improved fluid operated forwarding and drawing apparatus for continuous filamentary materials including a jet nozzle structure defined by a fluid outlet port from a fluid plenum chamber and a filament guide tube where the nozzle has a converging acceleration zone, a throat, a diverging expansion zone and a converging transition zone. A small diameter friction tube abuts an exit to the transition zone. The device is adjustable during set up and operation whereby close manufacturing tolerances are not required and operating parameters of the nozzle may be easily varied. The device is operable at low air pressures, low air consumption and low noise levels while handling filamentary materials at high linear velocities. A process for drawing and forwarding filamentary materials is also disclosed.

Abstract: An improved method and apparatus for forming nonwoven webs by spinning filaments into a quench chamber where they are contacted with a quenching fluid, then utilizing the quench fluid to draw the filaments through a two-dimensional nozzle spanning the full machine width, and collecting the filaments as a web on a porous surface. In contrast with the prior art, low motive fluid pressures can be used, and a non-eductive drawing means utilized to minimize air turbulence and the resulting filament entanglement in the drawing means while maintaining substantially constant cross machine filament distribution. The apparatus and process reduce problems relating to filament breakage and spreading and result in increased productivity and improved web formation. Other advantages include the ability to continuously spin highly pigmented polymer filaments and reduced hazards associated with high noise levels.

Abstract: A machine for making strudel leaf, dough sheets having a series of pressure rollers for thinning a wad of stretchable dough, a lower support belt for supporting the dough wad, a pair of upper and lower diverging belts which grab the edges of the thinned wad and stretch the dough into thin sheets, a drying chamber for drying the dough and a receiving drum on which the leaf is wound after drying.

Abstract: Apparatus for fluidically attenuating streams of molten material into filaments is provided comprising; a base having a first chamber and a recess separated by a wall having a plurality of apertures therethrough, said first chamber being adapted to receive a fluid; a first member having a first arcuate surface and a distal end, the first member being adapted to be joined to said base such that first arcuate surface is adjacent said recess and said apertures of said base; a second member having a second arcuate surface, a head region, and a third arcuate surface, said head region being located intermediate and contiguous with said second and third arcuate surfaces, said second member being joined to said base such that said second arcuate surface is positioned adjacent said recess and said apertures of said base such that said first arcuate surface, said second arcuate surface and said head region form a smoothly converging passageway, the head region being positioned relative to the distal end to form an outl

Abstract: The invention is a process and apparatus for forming a reticulated web net oriented from a perforated film wherein the perforated film is produced by thermoforming projections or pips on an endless perforated surface and subsequently skiving the pips off flush with the film, said thermoforming, skiving and orientation all taking place in a continuous fashion.

Abstract: Method and apparatus are provided for forming filaments comprising: means for supplying a plurality of streams of molten material; attenuation means for supplying of moving fluid to attenuate said streams into said filaments; said filaments being entrained in said fluid moving from said attenuation means; and means for separating said filaments entrained in said moving air comprising a foraminous surface having; (a) an intercept region oriented to form an acute angle between a path defined by the entrained filaments approaching said intercept region; and (b) a concave region contiguous with said intercept region oriented such that at least a portion of said concave region is positioned substantially transverse to said path such that a portion of said air passes through said foraminous surface and a portion of said air moves along said foraminous surface to move said filaments therealong.

Abstract: Process and apparatus are provided for producing filaments comprising: supplying a plurality of streams of molten material; attenuating said streams of material into continuous filaments through the action of a stream of fluid moving from an attenuation means; said filaments being entrained in said fluid moving from said attenuation means, moving said stream of fluid and filaments along a first surface positioned intermediate said attenuation means and a foraminous surface; establishing a vacuum at said foraminous surface; directing said stream of fluid and filaments into said foraminous surface obliquely oriented with respect to said first surface such that a first portion of said fluid separates from the filaments and passes through said foraminous surface and a second portion of said fluid moves said filaments along the foraminous surface; collecting said filaments.

Abstract: Method and apparatus are provided for producing a filament from molten rapidly crystallizing fibre-forming thermoplastic polymers. The apparatus includes a chamber for such molten crystallizable polymer having an electrically conductive orifice at one end of such chamber. Means are provided for applying sufficient pressure to the column of molten crystallizable polymer to form a flat meniscus at the orifice. An apertured plate of electrically conductive material (e.g. steel) is disposed a predetermined distance from the orifice. Finally, means are provided for applying a high voltage D.C. between the orifice and the apertured plate creating an electrostatic field which exerts a force on the column of the fluid (molten) polymer. Above a certain critical field strength the flat meniscus at the orifice is deformed into a conical shape from which a fine continuous jet of molten polymer is drawn.

Abstract: This invention relates to a method and apparatus for integrating a newly formed continuous filament into a continuous strand. Mechanically complicated prior integration devices are usually expensive to purchase and operate and do not always ensure that the initially formed section of the new filament is separated from the new filament, that the fiber diameter of the new filament is predrawn sufficiently for ready integration, or ensure the reliability of the guiding elements facilitating integration. The present invention includes the operations of drawing a plurality of continuous filaments 3 from a bushing 1 into a fiber fan 4 by gathering the filaments 3 into a continuous strand 6 at a deflection point or roller 5. Should one of the filaments 3 break, a new continuous filament 8 is formed which is deflected by a guide plate 9 toward the point 5.

Abstract: In the process, the strands, which are spun as a fused mass, are initially drawn, then preferably stretched, crimped or textured, and converted into helical windings. The helical windings are laid down on an endless conveyor formed by two conveyor belts laterally spaced from each other. The laid down helical winding turns are then cut between the two endless conveyors to produce two substantially identical fiber lengths from each helical winding turn. The melt spinning of the strands may be effected at such a high speed that the drawing of the filaments or fibers can be omitted. The helical winding turns, prior to cutting thereof, may be subjected to at least one after-treatment. The apparatus includes a rotary distributor into which the crimped strands are supplied substantially axially for conversion into helical winding turns, and includes endless belts tangentially engaging the helical winding turns to move the same downwardly onto the spaced pair of endless conveyor belts.

Abstract: A thermoplastic web of indeterminate length is provided by forming a tubular thermoplastic web having interconnected filaments. The web is rotated about its axis while being advanced along its axis and is slit so as to provide a web having substantially parallel filament alignment at an angle to the longitudinal axis of the web. The web may be formed into a multiply structure having a plurality of webs wherein the filament alignment of at least one of the webs of the structure is at an angle to the filament alignment of at least one of the other webs of the structure.

Abstract: A strip of heated thermoplastic material is extruded from a die past first and second stations while the strip is drawn down between the die and the first station. Initial cooling of the strip is performed at the first station and further drawing down of the strip is effected between the first and second stations. The strip is thereafter guided through a plurality of spaced convolutions about a journaled cylindrical member driven at a peripheral speed substantially equal to the linear speed of the strip as it enters the second station.

Abstract: A spray spinning nozzle for producing a substantially continuous filament from a molten synthetic resinous material includes a nozzle with a removable orifice from which a filament of molten material is emitted and a gas attenuation assembly which is laterally removable from the nozzle. The attenuation assembly includes at least three gas jets spaced about and radially close to the nozzle axis for emitting high velocity jets which converge upon and contact the filament at a point along the axis in front of the orifice. Drag forces produced by the gas jets attenuate the filament to a thin diameter.

Abstract: A spray spinning nozzle for producing a substantially continuous filament from a molten synthetic resinous material includes a nozzle with a removable orifice from which a filament of molten material is emitted and a gas attenuation assembly which is laterally removable from the nozzle. The attenuation assembly includes at least three gas jets spaced about and radially close to the nozzle axis for emitting parallel high velocity jets. Drag forces produced by the gas jets attenuate the filament to a thin diameter.The resulting filament has a comparatively narrow range of diameter variation.

Abstract: There is described in a preferred embodiment of the present invention, a process and apparatus for bi-axially stretching a tubularly-formed sheet of thermoplastic material in a first station and a plurality of second stations wherein the first and second stations are provided with sets of rolls having generally sinosoidally-shaped grooves perpendicular and parallel, respectively, to the axis of each set of rolls to produce bags of improved strip tensile breaking length.

Abstract: An apparatus is disclosed for drawing glass optical waveguide filaments having minimal diameter variation. A draw blank is supported within an elongated, heated, tubular muffle which heats the blank to its draw temperature. Gas is supplied to that end of the muffle opposite that from which the filament is drawn. A cylindrically shaped member at least 10 cm long is disposed adjacent to the end of the blank opposite the filament to form with the inner wall of the muffle a thin, cylindrically-shaped channel through which the gas must flow. The gas stream is thus uniformly heated at the time that it reaches the root of the filament so that diameter variations due to gas turbulence are minimized.

Abstract: A spray spinning nozzle for producing a substantially continuous filament from a molten synthetic resinous material includes a nozzle with an orifice from which a filament of molten material is emitted and a gas attenuation assembly which slides axially over the nozzle. The attenuation assembly includes at least three gas jets spaced about and radially close to the nozzle axis for emitting high velocity jets which converge upon and contact the filament at a point along the nozzle axis in front of an orifice. Drag forces produced by the gas stream attenuate the filament to a thin diameter. The nozzle includes a plurality of circumferentially spaced recesses which cooperate with corresponding recesses and projections of the attenuation gas assembly to accommodate heater means and to provide mounting means.

Abstract: A method of producing threads and fibers of synthetic materials uses a cylindrically-shaped body of the synthetic material which is allowed to rotate against a scratching tool and a peeling knife arranged to follow the scratching tool in the direction of rotation. The peeled-off curtain of parallel threads is stretched, possibly while being simultaneously heated, and possibly the threads are cut to form a staple fiber or are ground to a short-staple floccule. A device for carrying out the afore-mentioned method, has a turning mechanism, a foil-peeling knife secured to a carriage of the turning mechanism, and a scratching tool arranged to precede the peeling knife.

Abstract: An apparatus for stretching polymeric film is disclosed wherein a heating unit is located slightly above and between the parallel tracks of a tenter frame and wherein the heating unit includes an air duct with an air entrance opening and a series of apertures directed between the tenter frame tracks wherein the air duct is separated, by internal intermediate walls, into adjacent isolated zones extending parallel with the tracks of the tenter frame and wherein each isolated zone includes a heater. Air introduced into the duct is conducted through the zones where it is heated and directed through the apertures onto a web of polymeric film moving in the tenter frame prior to stretching.

Abstract: A method for continuously producing a non-woven web having uniform distribution of filaments from natural or synthetic fibers comprising drafting with use of a high speed air-jet type drafting device a number of filaments which are fed from a filament source and blasting the drafted filaments onto a face of a moving collector, which is characterized in that the distribution of the filaments is controlled by passing the filaments through a filament distribution-controlling device comprising a filament guide passage having a narrow rectangular cross section and an air sucking means provided at least an one rectangular side wall of the filament guide passage, said controlling of the distribution of the filaments being performed with the air stream sucked spontaneously or positively from the air sucking means.

Abstract: A method and system for controlling the deposition of fibers issuing from a fiberizing unit in a veil which displaces portions of the veil with fluid streams, e.g., air blasts. A moving continuous collector screen receives the veil to form a mat of fibers. Speed of the collector is coordinated with the rate of deposition in determining the amount of fiber deposited per unit length of product. Air streams directed transversely of the direction of motion of the collector displace portions of the veil toward the collector edges. Absence of the air blast permits deposition of the veil to be concentrated on the collector center region. Application of gas streams in pulses cause splitting of the veil into sections which are displaced laterally across the collector with pulse frequency generally being increased with collector speed, and center to edge weight distribution of product being coordinated with the pulse interval length and the interval between pulses.

Abstract: A. Treatment installation more particularly comprising a zonal heating system for elongated products, such as bars, tubes or wires made from inorganic material.B. This installation is characterized in that it comprises at least one introduction and supporting device for the product to be treated, at least one extraction and supporting device for that treated product and at least one treatment device traversed by the product, whereby at least one of these treatment devices is an enclosure in which there is an ultra-high frequency electromagnetic field.C. The invention applies more particularly to drawing glass wires.

Abstract: An apparatus for texturizing an initial rapidly melt-spun and preoriented thermoplastic yarn, especially a linear polyester yarn, wherein the initial yarn is subjected to draw-texturizing in a residual stretching stage with heating of the running yarn followed by unilateral or one-sided cooling to provide a temperature gradient over the transverse cross-section of the yarn and in a subsequent relaxation and heat-fixing stage to self-crimp the yarn under differential shrinkage. High yarn speeds are achieved in this draw-texturizing apparatus which is therefore especially useful in combination with rapid melt-spinning units.

Abstract: An apparatus for producing an optical fiber has a plurality of crucibles piled-up one upon another, each of which has a spinnerette positioned at a bottom portion to permit the molten glass to outflow therethrough and an overflow passage positioned at a side wall. With the apparatus of the construction described which is being heated as a whole, an optical fiber is spun from the spinnerettes while the crucibles are charged with their respective molten glasses in predetermined time intervals in such rates that when the molten glasses in the crucibles exceeds predetermined levels, the excess portion of the molten glasses are permitted to overflow through the overflow passages to associated receptacles, thereby the levels of the molten glasses in the crucibles are maintained constant during the entire spinning operation and the bubbles formed in the molten glasses are caused to outflown with the excess portions to enable an optical fiber of improved quality to be spun.

Abstract: A method for drawing silica fibers utilizing an electrical resistance furnace includes the steps of heating a preform so that it begins to flow forming a fiber; pulling the fiber from the furnace; and flushing the preform and the fiber within the furnace with counteracting inert gas flows, the gas flows protecting the preform and the fiber from contamination.Apparatus used with the above-described method is also disclosed.

Abstract: A process for the manufacture of non-woven webs of continuous filaments by extrusion, stretching, deflection and deposition of a bundle of filaments on a receiving table and executing a reciprocating movement in a direction transverse to the direction of advance of the receiving table, is disclosed. Also disclosed is an apparatus for carrying out that process, for applying a reciprocating movement to the filament deflection device, comprising first, a tube in two parts, through which the filaments travel, having a fixed part and a movable part one end of which slides in the fixed part and the other carries the deflection device, and, second, means for subjecting the movable part of the tube, held parallel to the table which receives the filaments, to a reciprocating movement.

Abstract: This invention relates to an improvement in a method for increasing the production of stretched flat film webs of thermoplastic material in which a melt of thermoplastic material is extruded from a slot die, the melt is solidified to form a film, the film is transversely stretched, the stretched film is heat-set, divided into narrower webs, and wound up, the improvement comprising extruding the melt from a slot die wider than the die normally employed for the production of a preliminary film, which usually corresponds to the width of a transverse stretching frame, dividing the melt in the longitudinal direction into at least two films, superposing the film webs, and transversely stretching said superposed webs. The invention also relates to an apparatus for performing the method.

Abstract: The production of organic fibers with inorganic cores is set forth. Inorganic, such as glass, fibers are attenuated from a bushing and then covered individually or in small groups with organic sheaths. With individual fibers, rows or orifices in a bottom of the bushing are staggered so as to equally space the filaments. The applicator for applying the organic sheaths has one groove for each of the individual fibers for applying the organic material and for maintaining the fibers separated therebelow. The applicator can be mounted in a manner such that it can be retracted from an operating position in engagement with the filaments when the bushing operation is stopped, raised to a position near the bushing bottom, and moved into engagement with the fibers again to automatically place one fiber in each groove when the bushing is restarted. The applicator is then moved down to the operating position again when the bushing is back in normal operation.

Abstract: Simultaneous production of a large number of winding packages of filaments of flat, round or profiled cross section by apparatus including extrusion devices, at least one cooling device, guide means, after-treatment devices (stretching, heating, etc.) and winding devices.