Abstract: An axial plunger slurry pump comprises a pump body, a sloping cam plate, a swashplate, cylinders, plungers and a pump head. Each of the plungers comprises a plunger body with a rubber piston positioned in its front end and being able to slide over it, and an oil receiving gap communicating with an oil passage disposed between two facing end surfaces of the plunger body and the rubber piston. There are check valves each of which is provided in an oil passage between a ball of each of two-ball links, which ball is coupled with the swashplate, and the swashplate. Each of the cylinder and the plunger body are fitted together by means of a half-and-half locating pad, a cylinder sleeve, a pressing cap, and a locking device. The pump may be used widely in drilling, electric power, mine, building, and metallurgy, etc., for conveying mud, mortar, ore pulp, coal pulp, concrete, etc.

Abstract: A C-shaped clamp cut from a PVC tube having a longitudinal axis and comprising a circular ring of a predetermined diameter and having side edges and a predetermined radial wall thickness extending through a predetermined width between the side edges and a slit cut across the width of the ring to define jaws on either side of the slit. A plurality of the circular clamps are utilized in a method for fabricating a counter top. Edge trims strips are adhesively laminated together on a shelf while held by clamps for curing and later adhesively secured to the periphery of a counter top panel, again held in place by clamps including corner clamps. In an another version, two panels are held in edge to edge contact by either abutments on the panels or by a stringer held in a bowed configuration by a combination of abutting clamps Handles are provided to facilitate manual opening of the clamps.

Abstract: The process for fabricating an orthotic joint of the present invention involves creating a casting mold of the anatomical joint for which the brace is being fitted. Then layers of nylon and cross-link carbon composite grade and the PVA bag are placed over the mold as is done in typical laminating processees for such braces. Then, a series of reinforcing strips of nylon and composite are attached to the layup in the same location where the sidebars would normally be located. The bottom layer which is typically a layer of nylon stockinette is the longest of the layers and the nylon strips are alternated with the composite strips with each successive strip being shorter than the strip immediately below it. A dummy disk is then provided at the joint. A second set of strips is then positioned where the upper sidebar would be located. Additional laminating substrate materials of nylon and cross-link carbon composite braid and a PVA bag are then placed over the structure.

Abstract: Multilayer meltblown fibrous webs, as well as apparatus and methods of forming the webs. The webs are produced on a rotating collector that also moves parallel to its longitudinal axis. The webs are thus formed in a helical process, and the resulting tubular web is separated in a direction parallel to a helix angle. By separating the tubular web in a direction parallel to the helix angle, a flat multilayer meltblown fibrous web is provided that allows for incorporation of feathered edges formed during the article's manufacture.

Abstract: A manufacturing method for U-bolts comprising the steps of (a) winding a linear, tape or cloth member made of fiber reinforced plastics in which at least a part of the fiber is oriented in three-dimensional directions around a mandrel having a substantially oval or rectangular section (b) making a pipe molded article by hardening the linear, tape or cloth member wound around the mandrel, (c) cutting the hardened pipe molded article into slices transverse to a longitudinal axis of the mandrel, (d) separating the molded article cut into slices into at least two U-shaped portions, and (e) forming screw portions at tip portions of a pair of separated U-shaped portions.

Abstract: A bypass conduit having a desired hollow internal geometry for defining a bounded blood flow path from an open first end positioned in a heart chamber and an open second end connected to a lumen of a coronary vessel is made by forming a master having an external surface with an external geometry complementary to the desired internal geometry of the conduit. The external surface of the master is coated with pyrolytic carbon to define a pyrolytic carbon conduit of pyrolytic carbon bonded to the external surface of the master and with the pyrolytic carbon having an internal surface with a conduit geometry complementary to the external geometry of the master. The master is removed from the pyrolytic carbon conduit.

Abstract: An elongated tubular structure of plastic strands is bisected along its axis to form open-topped self-supporting half-shells that can be used in cooling towers. The half-shells are stackable and can be transported in densely packed bundles.

Abstract: A method of manufacturing a controlled-release device is described. The method comprises taking a hollow tubular element which is permeable to the active substance to be released and injecting it with at least two plugs of hardenable material. These plugs form partitions which block the hollow tubular element and are spaced apart to form at least one discrete hollow chamber. The hardenable material is then hardened and an active substance is introduced into at least one of the discrete hollow chambers.

Abstract: A process for the manufacturing of hollow fiber sections for hollow fiber modules is disclosed. The process includes a casting matrix having a horizontal perforated plate, in which a number of perforations are arranged in a predetermined pattern and continuous hollow fibers are introduced through the perforations. A hardenable casting material is cast for the formation of a solid tube plate. The tube plate with embedded continuous follow fibers is raised in a vertical direction to a desired distance from the perforated plate. The tube plate is cut in the horizontal plane to expose the follow fiber ends. The steps are repeated for the formation of a hollow fiber section.

Abstract: A refuse container adapted for automated dumping operation comprises a pair of side-by-side container bodies joined along a portion of their respective rims by a connecting web and rigidly integrated with one another by upper and lower lifter bars affixed transversely to each container body in disposition to be engageable by grasping members of an automated dumping apparatus. The refuse container is advantageously fabricated by a method wherein a unitary hollow container structure is blow molded to initially form the two container bodies in tandem end-to-end mirror-image relation joined by a continuous annular connecting portion. The connecting portion is partially removed at each rim, leaving the connecting web therebetween, whereby the two container bodies may be pivoted into side-by-side relation and rigidly joined by affixation of the upper and lower lifter bars. A hinged lid may be pivotably connected to the container proximate the connecting web. The lid will selectively cover either container body.

Abstract: Method for manufacturing aspirator tubes (10) for medical and dental use which are provided with two opposite air apertures (13) adjacent at least one end thereof. The air apertures are made in a tube length which is moving axially and is cut to individual aspirators tubes. The apertures are made and the tube length is cut by means of continuously rotating cutters (17, 18, 22, 23) which are cuttingly engaged with the tube length at predetermined revolutions only while said cutters are brought to idle therebetween, withdrawn from the tube length.

Abstract: A method for making a mottled and patterned pen barrel is disclosed, wherein a tube is preformed to have two ends and an intermediate portion, At least one mold cavity is provided in a mold for forming the pen barrel. A pair of positioning members are sleeved respectively around two ends of the tube, and the positioning members are positioned in the mold cavity so as to center the tube in the mold cavity and so as to create, in the mold cavity, a molding space surrounding an entire peripheral surface of the intermediate portion. A liquid coating composition is poured into the molding space to form a cover integral with the entire peripheral surface of the intermediate portion. Finally, the covered tube is removed from the mold cavity and the positioning members are removed from the covered tube.

Abstract: Polymeric sheets or rolls suitable for in-line gravure printing and forming at high rates of production of in-mold labeled plastic containers comprise a polymeric transparent, translucent or contact clear substrate having a thickness in the range of 0.002 to 0.008 inches which is reverse gravure-printed and gravure overcoated on the container-facing side with a heat activatable adhesive and gravure coated on the opposite side with an antistatic coating. Such a sheet or roll can be printed and then cut into individual labels for affixing to the container as part of a unified in-molding process, without the need to manually stack and jog the sheets and labels into graphic registration. Recyclable containers are provided at high speed without missing labels or doubled labels due to feeding problems. The labels are firmly adherent, squeeze-release resistant labels and the indicia, because they are viewable through the labels themselves, are protected against spillage and abrasion.

Abstract: A method of making dual or multi-porosity porous plastic strips comprising placing a first quantity of plastic granules into a mold, and placing a second or additional quantities of plastic granules into the mold above the first quantity. The particle sizes of each of the quantities of granules placed into the mold are different from the particle sizes of all the other quantities of granules in the mold. The granules are subjected to heat and pressure so as to fuse them together into a self-sustaining porous plastic billet. The billet has a number of fused-together regions corresponding to the number of quantities of granules placed into the mold. The billet is sliced in a direction transverse to the planes containing the interfaces between the regions of the billet so as to create strips, each strip comprising interconnected regions have porosities which differ from one another. The mold may be cylindrical and the strip created by skiving it off the cylindrical surface of the billet.

Abstract: A process for producing a container and closure assembly includes molding a preliminary container including a closed bottom portion, a body portion and a shoulder and neck portion. The shoulder and neck portion is separated from the body portion. An open ended second container is formed from the body portion, the second container having a rim at its open end and an encircling wall. The open end of the second container is then closed with a closure comprised of a cap and a cap liner. The cap liner has a weakened portion adapted to be broken by the cap. The cap or the cap liner are formed from the shoulder and neck portion of the preliminary container.

Abstract: A multi-vane structure for incorporation in an aircraft gas turbine engine has vanes of complex geometry made of braided fibers which are continuous about the cavities defined by the vanes. These complex geometry parts are prepared by providing a plurality of removable mandrels, stacking the mandrels along a horizontal axis in a cavity end to cavity end configuration, braiding about the mandrels, cutting the mandrels adjacent the cavity end faces, side stacking the mandrels so the faces are placed in a parallel orientation and molding. Utilizing braided fibers instead of hand lay-up woven fibers eliminates seams and produces cavities having continuous fibers about the periphery thereof which substantially increases the strength and dimensional reproducibly of the part.

Abstract: A sealing device to be mounted between a member and a rotation shaft which can be rotated relatively to the member, includes an annular flanged portion formed of a resin and disposed to surround the rotation shaft, and extends in a radial direction of the rotation shaft. A resin seal lip extends from an inner end of the flanged portion in an axial direction of the rotation shaft toward fluid to be sealed in such a manner that the resin seal lip surrounds the rotation shaft. The resin seal lip has a first seal ring having a sealing surface which hermetically and slidably contacts the rotation shaft, a second seal ring having an elastic flanged portion formed of a rubber material and disposed to surround the rotation shaft and extending in a radial direction of the rotation shaft, and an elastic seal lip extending, over the resin seal lip, from an inner end of the elastic flanged portion in the axial direction of the rotation shaft toward the fluid to be sealed to surround the resin seal lip.

Abstract: A method for making tubular members, each of which is coated with a decorative layer that has a randomly distributed chip pattern, includes the steps of: (A) preparing tube products, each of which having two ends and an intermediate portion between the two ends; (B) preparing a mold having a plurality of mold cavities; (C) sleeving detachably a pair of positioning members around the two ends of each of the tube products for enclosing and centering the two ends, and placing each of the tube products and the positioning members associated therewith in a respective one of the mold cavities; (D) forming a covering around the intermediate portion of each of the tube products by filling each of the mold cavities with a coating composition containing chips; (E) removing each of the covered tube products and the positioning members associated therewith from the mold, and detaching the positioning members from each of the covered tube products; and (F) machining and polishing the covered tube products, and cutting off

Abstract: A product and process for imparting decorative appliques to the sidewalls of tires during the curing operation are presented. In one embodiment, a spool of applique composite material is maintained for feeding into a tire mold or onto a transfer device, thereby defining a ring for vulcanization to a tire. The applique consists of a laminate received upon a carrier, the laminate having a first barrier layer and a congruent second decorative layer. The laminate is received by a tire sidewall between two grooves which serve to isolate the decorative layer from the tire itself. In another embodiment a laminate of white and barrier rubber stock is formed and then configured into a cylinder. A plurality of bands are cut from the cylinder then transferred to a fixture by reorienting the bands to conform to the angle of the sidewall of the tire at the point with which the band is to be adhered.

Abstract: An apparatus for the continuous production of foamed plastics is described. The apparatus includes i) a continuous conveyor belt, and ii) a transversely reciprocating applicator device located over the belt for applying a foam-forming reaction mixture. The applicator device includes a mix head and a detachably mounted magazine plate having several openings thereon. Each opening has a casting tube connected thereto. Each casting tube has discharge holes on its underside. The plate is adjustable in such a way that the casting tubes can be connected successively to the outlet of the mixhead.

Abstract: Antiabrasion curved section made of reinforced curved plastic material and comprising in at least one of a lower portion and an upper portion in antiabrasion material. A plurality of antiabrasion sections are produced inside a profiled mold having a plurality of grooves in which is arranged the antiabrasion material of the lower faces. Reinforced filaments impregnated with a stabilizable resin are supplied to the mold and, finally, the antiabrasion material of the upper faces is applied. The mold is wound on a mandrel and the plastic material is stabilized before removing the mold sections which form a unitary assembly dividable particulary during the stranding of arm rings.

Abstract: An apparatus for forming curing envelopes which apparatus enables the use of a conventional inner tube mold for making a curing envelope preform in the form of an envelope tube which may have a portion thereof easily removed to provide a curing envelope suitable for use in a tire retreading process. A curing envelope is made by placing an annular tube of uncured envelope material in a curing mold having a center core and a mold insert installed therein. The insert includes a pair of coaxial annular rings projecting radially outwardly from the center core and connecting straps for maintaining the axial spacing between the rings. The mold is closed and heat and internal pressure are applied to the envelope tube for curing the envelope tube and urging the tube against the interior cavity surface with the annular rings penetrating into the inner wall of the tube for forming therein corresponding annular grooves.

Abstract: A method of producing a spliceless annular tread cap (2), whereby a portion (23) of an extruded tube (21) of green elastomeric material is fed inside an annular body (8), the inner annular surface (17) of which presents a diameter approximately equal to but no smaller than the outside diameter of the tubular portion (23), and negatively reproduces the pattern of the finished tread cap (2). The tubular portion (23) is expanded and calendered against the inner surface (17) of the annular body (8) by means of a roller (34) moved into a position coplanar with and eccentric in relation to the annular body (8).

Abstract: A product and process for imparting decorative appliques to the sidewalls of tires during the curing operation are presented. In one embodiment, a spool of applique composite material is maintained for feeding into a tire mold or onto a transfer device, thereby defining a ring for vulcanization to a tire. The applique consists of a laminate received upon a carrier, the laminate having a first barrier layer and a congruent second decorative layer. The laminate is received by a tire sidewall between two grooves which serve to isolate the decorative layer from the tire itself. In another embodiment a laminate of white and barrier rubber stock is formed and then configured into a cylinder. A plurality of bands are cut from the cylinder then transferred to a fixture by reorienting the bands to conform to the angle of the sidewall of the tire at the point with which the band is to be adhered.

Abstract: A polypropylene resin foamed sheet for thermoforming having compounded therein an inorganic fine powder is disclosed. The sheet contains 10 to 50% by weight of the inorganic fine powder, has a density of 0.2 to 1.2 g/cm and a thickness of 0.2 to 3 mm and having a percent shrinkage of 5 to 30% in each of the longitudinal and crosswise directions on heating at 190.degree. C. for 30 minutes, with the ratio of a residual rate in the longitudinal direction to that in the crosswise direction being from 1:0.7 to 1:1.1. The sheet is produced by extruding and foaming a compounded resin from a ring die of an extruder, and taking off the extruded tubular foamed sheet along a cylindrical drum whose diameter is 2.0 to 3.0 times that of said ring die.

Abstract: A method of creating a score in a pouch formed from a thermoplastic film is described. Ultrasonic energy is used to create the score in a film that is later formed into a pouch. The score can be used to open the pouch by pulling opposite sides of the scored area. The ultrasonic force is applied to the film as a part of a downstream process in a blown film manufacturing line to produce the pouch.

Abstract: According to the invention, calibrated rings are obtained by superficially vulcanizing extruded or profiled extrudate at the exit of an extrusion head (T), then by cutting this vulcanized extrudate into portions by means of a conical cutting device (C), subsequently by butting the two ends, in the respective form of a conical tip and a funnel, of each portion (t) together under hot conditions and under a controlled pressure, in order to obtain a ring blank which is then engaged between the half-cavities of a mold (Mo), where it undergoes shaping and vulcanization by the heating of the latter and thereafter deburring as a result of a shearing action produced by a push device (D) causing the half-cavities to slide in the closed position in the frame of the mold, before causing the opening of the latter by means of a device (G) and the release of the calibrated and superficially clean ring obtained.

Abstract: The vessel portion of a gas-tight container suitable for packaging fresh foods is produced as a composite of paperboard and polymer film. A pair of folded paperboard blanks, pre-cut and pre-formed, are inserted into the opposite halves of split mold elements to a blow molding machine. Vacuum orifices in each mold half unit temporarily secure the position of a respective paperboard blank. The paperboard lined mold halves are closed upon a hot, extruded parison of malleable polymer leaving an end portion of the parison tube projecting from the closed mold unit. A fluid conducting needle penetrates this projected end portion to inflate the parison with an apppropriate blowing gas. Such inflation expands the malleable polymer, seamlessly and creaselessly, into the internal corners and crevices of the folded paperboard blanks. Following chilling, the mold unit is opened and the pair of paperboard blanks are ejected as a singular unit, joined by a molded flange of the continuous polymer film.

Abstract: A series of driven rolls for separating blow-molded products from segments of flash material in a string of products formed in a synthetic resin continuous molding machine. A first pair of rolls receives a string of products joined by flashes as the products are removed from the dies of a blow-molding apparatus. At least one of the rolls in the first pair of rolls is driven at a first rotational speed. An intermediate pair of rolls receives the string of products and flashes from the first pair of rolls, and the intermediate rolls are driven at a speed faster than the first rotational speed to stretch the string of products and thereby separate the flashing segments from the products. A pair of last rolls is spaced by an interval from the pair of intermediate rolls. The interval between the intermediate rolls and the last rolls is adjusted such that the products and the flashes can be sorted by length.

Abstract: Process of manufacturing a cryogenic regenerator including a plurality of channels for conducting a working fluid, including the steps of providing a cylindrical forming member having a longitudinal axis and a plurality of peripheral slots displaced axially and oriented substantially parallel to the longitudinal axis of the cylindrical forming member, or having a continuous spiral peripheral slot of sufficiently small pitch such that the convolutions thereof are oriented substantially parallel to such longitudinal axis; providing epoxy which is relatively flexible upon hardening, loading the epoxy with thermally conductive material for enhancing the radial thermal conductivity of the cryogenic regenerator, and applying the epoxy to the periphery of the cylindrical forming member to fill the plurality of slots or the spiral peripheral slot with the epoxy and to form a radial layer of the epoxy of a generally first radial thickness allowing the epoxy to harden and thereafter reducing the radial thickness of the

Abstract: A foamable plastic material is introduced to an extruder to produce a tubular parison of the material that is subsequently clamped between mold halves moving both axially and radially inwardly to form cavities for open mounted containers. Cavities for two containers are provided with each set of mold haves clamped together around the parison at the middle of the mold set to provide individual container cavities extending on either side of the clamped portion, said individual cavities terminating in the mouth portion of the container cavity which is joined in a mouth to mouth relationship with an individual container cavity of the next set of mold halves.

Abstract: A sealing element for use with a radial lip oil seal includes a mounting section formed of a first polymer and a sealing section formed of a second polymer. The sealing element sections are bonded together during a common sintering operation so that each polymer is sintered only once. This reduces molecular degradation of the polymers typically caused by multiple sintering operations.

Abstract: A process for producing a detachable insulation for inaccessible hollow spaces on warm installations of pipelines, fittings, and containers includes the steps of surrounding the installation with a sheet metal jacket, supporting the sheet metal jacket at a spaced location from the installation in order to form a hollow space between the sheet metal jacket and the installation, filling the hollow space through an opening in the sheet metal jacket with free-flowing insulating material and a binder, curing the binder to form a rigid insulating shell, removing the sheet metal jacket, and cutting the insulating shell by appropriate axial and radial cuts to form individually removable insulation sections.

Abstract: The present invention relates to a method of and an apparatus for manufacturing biaxially oriented film. A tubular original film which has been extruded by an extruding die is biaxially oriented by heat and air injected to the inside portion thereof being conveyed to nip rolls each having an individual circumferential speed. The temperature of heat to be applied to the film is controlled on the basis of the detected film thickness for the purpose of obtaining a uniform film thickness distribution. Furthermore, the film can be made uniform by adjusting the outer diameter of the bubble-shaped oriented film by adjusting the distance between two sets of nip rolls on the basis of the measured width of the film. In addition, when the thus-oriented film is subjected to a heat treatment, temperature of heat is arranged to be a predetermined temperature as to prevent adhesion of the films.

Abstract: Thin-walled catheters are provided which have an elongated fuseless polymeric tube that is made from a single tube of extruded polymer. The elongated fuseless polymeric tube includes a body portion that had been subjected to a high temperature zone in order to solid state polymerize and enhance the mechanical stability, burst strength and kink resistance of the body portion. Also included is a tip portion of the elongated fuseless polymeric tube which was subjected to a low temperature zone to retain the initial properties of extruded polymer.

Abstract: A method of making power transmission belt including an endless belt body made of an elastomer matrix. Embedded in the endless body are tensile cords used to strengthen the belt. Along the inner circumference of the belt are formed a plurality of teeth having teeth bottoms there between. Embedded in the endless belt body between the tensile cords and the surfaces of the teeth and teeth bottoms is a layer composed of nonwoven fabric having the elastomer matrix permeated therethrough. The nonwoven fabric layer is evenly diffused in the teeth, but is compressed at the tooth bottoms to form, along with the elastomer matrix permeated therethrough, a thinly compressed layer protecting the tensile cords. The nonwoven fabric is placed around the outer cylindrical surface of a cylindrical internal die in a substantially uncompressed state. The tensile cords are wound spirally over the nonwoven fabric to compress the fabric to a predetermined thickness.

Abstract: A method for making an Airspring and Sleeve that each have a chamber portion and rolling lobe portion reinforced with successive layers of embedded cord by winding cord in one layer at opposite helical angles from cord of a second successive layer and winding cord at inconstant helical angles in an annular band portion of at least one of the sleeve portions.

Abstract: Braided plastic sleeving useful in electronic applications is readily cut by means of a hot wire which is advanced through the sleeving when in flattened form at a controlled rate. It is important that the sleeving be under tension at the location where the cut is to be made. The size of the heated wire and the rate of advance of the heated wire through the flattened braided sleeving relative to the size of the braided sleeving is important to obtaining cutting and sealing of the ends of the braided sleeving without welding the ends shut. Means and method for achieving this is described herein.

Abstract: An extruder apparatus for molding a tube used for guiding a rod-like medical instrument into a living body. The resulting tubular body is made of a synthetic resin and has a longitudinal hollow portion to permit the passage of the rod-like medical instrument. The whole of the tubular body is formed to have a chemical uniformity, but at least one brittle portion such as a weld line is longitudinally formed over the entire length (or almost the entire length except the tip portion) of the tubular body. The brittle portion is formed by a die including a nozzle having a resin flow passageway of annular cross section. At least one baffle extends radially into the passageway for substantially temporarily splitting the flow which is then recombined to form the brittle portion.

Abstract: A method of manufacturing soft tip catheters having inner rigid polymer layers and outer soft, pliable polymer layers. The method involves first extruding the rigid polymer at varying extrusion rates to form a cylindrical body having a depression at one or more prescribed locations. The outer layer is formed by extruding the soft, pliable polymer over the inner to fill in the depressions. The resulting cylindrical body is then cut to form individual catheters having soft tip as defined by a portion of the prescribed locations.

Abstract: A catheter fabrication method and apparatus. Two rotating contact rollers define a nip to engage a mandrel used in fabricating an elongated tubular catheter. The rollers pull the mandrel from the catheter as a retaining block prevents the catheter from moving with the mandrel. The rollers rotate in opposite directions and are driven by a variable speed direct current motor.

Abstract: A method and apparatus of making a plurality of flexible hoses each having a preformed bend section between opposed ends of the hose that tends to return to the shape of its preformed bend section when unbent therefrom are provided, the method comprising the steps of winding a continuous length of a hose material around a pair of spaced apart substantially cylindrical posts so that a plurality of sections of the hose material extends between the posts, heat curing the hose material while the same is in the wound condition thereof on the posts, and, thereafter, cutting the plurality of hoses from the thus cured hose material so that each hose has the preformed bend section therein that was defined by its wound relation with the post, the step of winding the hose material around the posts comprising the step of orbiting the posts about an axis that is substantially parallel to the longitudinal axes of the posts.

Abstract: A type carrier set (10) for a stamp printing mechanism is described which comprises a plurality of type carriers (12) which carry print types (22) at their outer surface in consecutive fields (16). The type carriers (12) are disposed parallel adjacent each other in the order necessary for use in the stamp printing mechanism. The adjacently disposed type carriers (12) are connected together by connecting webs (28) adapted to be sheared off. In the method according to the invention for assembly the stamp printing mechanism using a type carrier set according to the invention in which the type carriers are endless bands, the type bands connected together are separated from each other consecutively in each case on turning for the first time of the setting shaft by shearing off the connecting webs (28).

Abstract: A method of producing a composite comprising a self-supporting polycrystalline material obtained by oxidation reaction of a molten parent metal with a vapor-phase oxidant comprising infiltrating a filler exhibiting inter-particle pore volume with a parent metal under conditions which control the respective rates of said metal infiltration and said oxidation reaction.

Abstract: This relates to blow molded containers, and particularly to the formation of blow molded containers formed of a plastic material which is subjectable to a high degree of biaxial orientation for maximum strength. Two containers are formed in each blow molding operation with each container having throughout the stress areas thereof a high degree of biaxial orientation. A container may be in the form of a bottle having an as formed open bottom which is closed by a metal end unit seamed in place. Other containers will have open mouths closed by conventional closures including metal end units which are seamed to the container body or by closure caps which may be releasably interlocked with the neck finish of the container in several known modes. In every instance the containers are formed with a minimum of scrap. This abstract forms no part of the specification of this application and is not to be construed as limiting the claims of the application.

Abstract: A process and apparatus for producing plastic-bound propellant powders and explosives in crystalline form, with the apparatus including an extruder comprising a casing with a feed opening, optionally a solvent supply opening and one or two extruder shafts with kneading and conveying segments. For processing the plastic binders, which polymerize photochemically or under X-rays, a casing section transparent for the rays is provided, with polymerization within the extruder being initiated by UV/VIS or X-radiation sources arranged around it and the radiation intensity and/or the wavelength of the radiation are controlled as a function of the pressure difference over a given path in a compression zone of the extruder, in such a manner that the propellant or explosive strand or strands leave the extruder in a dimensionally stable and cuttable manner.

Abstract: A novel process and system is provided for protecting oil filed tubular goods such as subs, drill pipe, casings, tubing, drill collars, line pipe and the like having threaded or machined end coupling portions, against rust, pitting and moisture induced corrosion damage, wherein the machined, threaded or tool joint area of such tubular product are coated with grease, dope or like protective compounds and then is encased and protected against the weather and moisture attack by a shrinkable plastic wrapping enveloping end portions of the machined and grease coated tubular products protecting them by a shrink wrap encasement of low density polyethylene film or the like.

Abstract: A process of forming biaxially oriented tubular articles by repeatedly performing a cycle of operations which includes engaging a thermoplastic tube by a first clamping member over a first region at a trailing end of the tube and engaging the tube by a second clamping mechanism over a second region at a spacing from the first region so as to define between the clamping mechanisms a portion of the tube to be longitudinally stretched and radially expanded; moving the clamping mechanisms apart to stretch the tube portion therebetween longitudinally; admitting pressure fluid into the tube portion to expand it radially and form a biaxially oriented bubble adjacent the leading end of the tube, and severing a substantial part, but not all, of the bubble from the tube to form the tube with a radially outwardly flared end as the leading end of the tube for the succeeding cycle of operations.

Abstract: A method of producing an oil seal comprises the following steps: a slicing step in which a seal ring is sliced from an end of a tubular billet of a resin material in a predetermined axial thickness; a fixing step in which the radially outer portion of the seal ring is fixed in the support member; and a bending-out/thread-forming step in which the radially inner portion of the seal ring is bent out of the plane of the radially outer portion of the seal ring thereby forming a tubular seal lip, and sequentially after forming of this seal lip, a screw thread is formed on the inner peripheral surface of the tubular seal lip. The fixing step is conducted by a press having an upper die and a lower die, in which the seal ring is fixed in the support member.

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.