With Shaping Between Extruding And Cutting Steps Patents (Class 264/151)
  • Patent number: 5137673
    Abstract: Plasticized polyvinyl butyral sheet optionally containing a gradient color band is formed by continuously extruding a sheet having a predetermined region across its width formed from melt issuing from a die at an increased mass flow rate in comparison with other portions of the melt forming the rest of the sheet and then forwardly distorting such sheet immediately after forming by preferentially stretching the side containing the predetermined region to form an arcuate shape of substantially uniform thickness. Arcuately shaped sections are then cut from the sheet to form discrete, shaped interlayer blanks having improved thickness uniformity and dimensional stability providing improved performance when used in laminated safety glass.
    Type: Grant
    Filed: November 17, 1987
    Date of Patent: August 11, 1992
    Assignee: Monsanto Company
    Inventors: David P. Bourcier, Robert A. Esposito
  • Patent number: 5114650
    Abstract: A method of extruding a profiled strip of polymeric material off the extrusion die of a plastic extruder and immediately thereafter compression forming a predetermined section of the profiled strip into a predetermined shape when temperature of the polymeric material is sufficiently high to allow plastic flow in the profiled strip.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: May 19, 1992
    Assignee: General Motors Corporation
    Inventors: Donald L. Franck, Suresh D. Shah, Manu K. Sheth, Lawrence D. Zabel
  • Patent number: 5108681
    Abstract: An improved decorative automotive vehicle trim strip and method and apparatus for forming are provided by reshaping an end of a previously extruded length of thermoplastic material. The surface of the length of thermoplastic material intended for viewing is maintained at a cold temperature, well below the softening point of the thermoplastic material, during the reshaping operation. The length of thermoplastic material is heated during reshaping by a mold section heated to 400.degree. to 410.degree. F. pressed against the surface intended to be affixed to the vehicle.
    Type: Grant
    Filed: August 24, 1989
    Date of Patent: April 28, 1992
    Assignee: Aeroquip Corporation
    Inventor: Mehmet Y. Cakmakci
  • Patent number: 5106567
    Abstract: As an article of manufacture, an ovenable shaped article formed of polyethylene terephthalate having a degree of crystallinity of at least 20%, said crystallinity being substantially uniform over the whole of the shaped article, and a process and apparatus for making same.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: April 21, 1992
    Assignee: Therma-Systems Corporation
    Inventor: A. Edward Demerest
  • Patent number: 5098626
    Abstract: Method for packing a measured quantity of thermosetting resin, intended for encapsulating a component such as an integrated circuit by introducing this quantity into a flexible plastics covering which can be sealed airtight, and packing for a measured quantity of thermosetting resin intended for encapsulating a component.
    Type: Grant
    Filed: November 22, 1989
    Date of Patent: March 24, 1992
    Inventor: Ireneus J. T. M. Pas
  • Patent number: 5084282
    Abstract: A texturing assembly for a machine for forming special brick shapes from extruded slugs of unfired material. The slugs are conveyed forward by conveyor(s) onto an elevator which lifts vertically. This lift pushes the slugs into opposing rollers. The rollers are arranged on opposing shafts spaced to produce vertical indentations in the slugs on 8-inch centers. The edges shaped by the rollers are the 4-inch long textured edges on the finished faces. At a convenient height above the rollers and on matching 8-inch centers are fixed horizontal wires. The cuts by the wires are centered in the indentations made by the opposing rollers. The cut and textured green paver brick rest on top of the slugs captive in the opposing rollers until lifted away by an automatic setting machine.
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: January 28, 1992
    Assignee: J.C. Steele & Sons
    Inventors: Gerald L. Stuart, Thomas M. Fisher, Charles B. Whittaker
  • Patent number: 5076872
    Abstract: A flexible composite material comprising a core composed of a blend of a thermoplastic resin fiber and a reinforcing fiber, and a flexible sleeve formed of a thermoplastic resin and surrounding the core is prepared by intermixing a thermoplastic resin fiber and a reinforcing fiber to obtain a core, and then extruding a thermoplastic resin over the core.
    Type: Grant
    Filed: June 9, 1988
    Date of Patent: December 31, 1991
    Assignees: Fuji Standard Research, Inc., Fuji Oil Co., Ltd., Across Co., Ltd.
    Inventors: Takao Nakagawa, Hiroyuki Uchino, Mihoko Yamashita, Jiro Ichikawa
  • Patent number: 5069847
    Abstract: Solid polyester fiber in spun yarns, and fabrics and garments and precursor staple fiber and filamentary tow, are prepared by an improved process involving treatment of freshly-extruded undrawn polyester filaments with caustic in the spin-finish, so as to improve moisture-wicking properties.
    Type: Grant
    Filed: October 12, 1989
    Date of Patent: December 3, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Teddy H. Grindstaff
  • Patent number: 5063014
    Abstract: Automotive trim strips are molded in an open-faced mold cavity by extruding a ribbon of plastic therein and moving a shaping roller thereover to compression mold the viewing surface of the trim strip into conformity with the surface of the mold cavity and to shape the non-viewing with the shaping roller.
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: November 5, 1991
    Assignee: Aeroquip Corporation
    Inventor: Mehmet Y. Cakmakci
  • Patent number: 5047189
    Abstract: There is provided a process for preparing a partially-dissolvable and splittable conjugated microfiber with a cross-section having a matrix comprising orange-wedge shaped islands slightly connected with each other at the tips of the islands at a common matrix center. The conjugated fibers can be made into filaments and staple fibers. Filaments are spun, taken-up and then textured by means of a belt nip twister. The resulting texture yarns may then be partially dissolved, following weaving, to split. Staple fiber is processed into a non-woven fabric or, by spinning, to spun yarn and then by weaving thereof. The staple fibers can be made into fabrics such as suede fabrics, water-resistant and humidity-permeable high density fabrics, and peachskin fabrics.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: September 10, 1991
    Assignee: Nan Ya Plastics Corporation
    Inventor: Chen-Ling Lin
  • Patent number: 5045255
    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.
    Type: Grant
    Filed: October 30, 1990
    Date of Patent: September 3, 1991
    Assignee: Scott Paper Company
    Inventor: John H. Kurz
  • Patent number: 5028369
    Abstract: A process for the discontinuous or (preferably) continuous production of dry spun hydrophilic acrylic fibers and threads with a core/sheath structure which have improved color fastness properties, more uniform cross-sections and better processing characteristics. By employing a new after-treatment combination of more intensive counterflow washing, stretching in steam, fixing in steam and careful drying of the fibers as staple fibers, improved hydrophilic fibers with a water retention capacity above 30% can be obtained from spinning solutions which have a much lower non-solvent content than is necessary in the present-state of the art for obtaining a high water retention capacity of the order indicated above.
    Type: Grant
    Filed: September 20, 1989
    Date of Patent: July 2, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ulrich Reinehr, Gunter Turck, Egon Kunzel, Dieter Paulini, Dieter Heinkes
  • Patent number: 5017320
    Abstract: A process for manufacturing stratified pieces, such as roof tiles and wall tiles, by sucessive and independent extrusion of mortars or concretes. In the process mortar is deposited on a limited part of the molds. The mortar is extruded and compacted, and some mortar is dislodged from cross strips in each zone of contact between two consecutive molds. Thereafter, complete sheets of mortar are shaped on the first layers, filling both the emptied cross strips and the limited sides, and lastly the thicknesses of the pieces are cut in their entirety in a vertical transversal plane at each zone of contact of the molds to form multiple layer tiles having homogeneous facing surfaces.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: May 21, 1991
    Assignee: Uralita, S.A.
    Inventor: Rafael Velazquez Garcia
  • Patent number: 5013502
    Abstract: A process for the production of crimped filaments and fibers of acrylonitrile polymers of copolymers containing at least 40% by weight acrylonitrile units, by dry spinning from highly polar solvents, where the filaments are brought to extremely low solvent contents in the actual spinning tube by a minimum of superheated steam prepared in the absence of water at very high spinning tube temperatures and spinning gas temperatures, but are cooled to low filament temperatures in the spinning tube by application of water or aqueous finishes in a quantity equivalent to more than 10% by weight moisture. In this way, spun PAN filaments of good natural color are safely obtained, in which there is no washing stage and no drying stage. Acrylic fibers and filaments combining a vacuolestable structure with a very high degree of whiteness and gloss are thus obtained with densities of at least 1.180 g/cm.sup.3, giving shrinkage-free to high-shrinkage fibers, depending on the aftertreatment applied.
    Type: Grant
    Filed: September 19, 1989
    Date of Patent: May 7, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ulrich Reinehr, Rolf-Burkhard Hirsch, Hermann Josef Jungverdorben, Joachim Dross
  • Patent number: 4981637
    Abstract: A method is shown for forming a wiper blade in which a continuous length of elastomer is extruded through a die having a die opening shaped to produce a pair of wiper blades joined in edge-to-edge relation. The elastomer is preformed to produce a weakened mid- section and then cured. The cured elastomer is then separated into two separate lengths of wiper blade by pulling the length of continuous elastomer along the weakened mid-section.
    Type: Grant
    Filed: November 9, 1989
    Date of Patent: January 1, 1991
    Assignee: JMK International, Inc.
    Inventor: Michael L. Hyer
  • Patent number: 4940557
    Abstract: A method of manufacturing molding members, for instance for automobiles, wherein an elongate shaped body is prepared from synthetic resin material either by an extrusion process, or by an injection process and is subjected to a controlled heating so as to soften the interior resin material while preserving the hardness of the outer surface portion. A cutter blade is advanced into the shaped body while it is subjected to the controlled heating, whereby the outer surface portion is urged and deformed inwardly to form a smooth end surface in continuous connection with remaining outer surface of the molding member.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: July 10, 1990
    Assignee: Hashmoto Forming Industry Co., Ltd.
    Inventor: Kaoru Kimura
  • Patent number: 4938677
    Abstract: A pattern roll especially adapted to form, in an in-line manner, peripheral edges of an article having substantially constant geometry and the pattern roll's method of fabrication are described. A bounded surface region is defined on at least a portion of a pattern roll's cylindrical surface by means of a number of circumferential and longitudinal (relative to the pattern roll's central axis) segments. Beveled surfaces are formed on these rib segments with the angle formed by the beveled surface of the circumferential segment being less that the angle formed by the beveled surface of the longitudinal segment. Notwithstanding this angular difference as between the beveled surfaces of the circumferential and longitudinal rib segments, when the pattern roll is then rotated in opposition to a platen roll so as to define a nip therebetween, and a molten thermoplastic is extruded into the defined nip, a plastic product having a peripheral beveled edge of substantially constant geometry will be formed.
    Type: Grant
    Filed: September 29, 1988
    Date of Patent: July 3, 1990
    Inventor: Edward S. Robbins, III
  • Patent number: 4925512
    Abstract: The method ensures that the core of thermoplastic material of the product is completely enveloped by a continuous covering formed by at least one sheet of a flexible material. Equipment for carrying out the method comprises an extruder 7 for delivering the thermoplastic material in a pasty state and in the form of a rod 16-18 having a regular section, means 20 for unrolling under this rod a sheet 19 of a flexible material, means 34 and 41 for completely enveloping said rod with said flexible material, and means for pulling on said sheet of flexible material and conveying the rod to calendering rolls 43 and 44, and means 46 for forming and means 47 for cutting to the desired length said rod which is thus completely enveloped by said sheet of flexible material. This equipment is applicable to the manufacture of shapes and plates for in particular the packaging and transportation of products.
    Type: Grant
    Filed: September 30, 1987
    Date of Patent: May 15, 1990
    Assignee: Sonoco Gunther S.A.
    Inventor: Jean P. Briand
  • Patent number: 4913473
    Abstract: Non-releasable, double-walled, molded, large-diameter, corrugated plastic pipe having walls made of high density polyethylene, PVC or polypropylene of sufficient thickness so as to be rigid but elastic and therefore relatively inflexible and having an integral automatically locking female coupling at one end, with access to its latching members at its exterior, and a method of manufacturing multiplex thereof by a continuous molding process. The pipe has a smooth interior wall and a corrugated outer wall integral therewith. Only minor auxiliary cutting operations are required to separate portions thereof into individual plastic pipe sections, each having the automatic-locking coupling at one of its ends. The coupling is supported on the corrugated pipe by a frustoconically shaped collar which functions as a guide for proper alignment as two sections of pipe are united into latched relation.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: April 3, 1990
    Inventors: Eldon G. Bonnema, James L. Fouss
  • Patent number: 4904434
    Abstract: A method is shown for forming a wiper blade in which a continuous length of elastomer is extruded through a die having a die opening shaped to produce a pair of wiper blades joined in edge-to-edge relation. The elastomer is scored in the mid-section thereof to produce a score line and then cured. The scored and cured elastomer is then separated into two separate lengths of wiper blade by dividing the length of continuous elastomer along the score line.
    Type: Grant
    Filed: October 28, 1988
    Date of Patent: February 27, 1990
    Assignee: JMK International, Inc.
    Inventor: Michael L. Hyer
  • Patent number: 4888074
    Abstract: The specification describes and claims a method of making therapeutic rings from a curable silicone rubber based composition. The rings are capable of controlled release of the therapeutic agent in the human or animal body. The method includes the steps of:(i) extruding a first composition comprising a therapeutic agent and a first elastomer-forming silicone composition to provide a core;(ii) extruding a second composition comprising a second elastomer-forming silicone composition to provide a sheath enclosing the core;(iii) bringing together end portions of a piece of extruded core and sheath to form a ring,(iv) effecting crosslinking of the extruded core, and(v) effecting crosslinking of the extruded sheath.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: December 19, 1989
    Assignee: Dow Corning France S.A.
    Inventor: David Pocknell
  • Patent number: 4880585
    Abstract: Extrudable pharmaceutical mixtures are tableted by a continuous method in which the mixture is extruded and the still deformable extrudate is pressed between two rollers which are driven in opposite directions and possess depressions opposite one another in the roller shell, the form of these depressions determining the tablet shape.
    Type: Grant
    Filed: December 22, 1988
    Date of Patent: November 14, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Roger G. Klimesch, Gerhard Bleckmann, Karl-Peter Farwerck, Hans-Helmut Goertz, Lothar Schlemmer
  • Patent number: 4863541
    Abstract: Long lengths of a heat-shrinkable sleeve for use in splicing electrical cables and the like are manufactured by providing an elongated impermeable core having a smooth outer surface, extruding an elongated sleeve around and in contact with the core, the sleeve having a smooth inner surface conforming to the outer surface of the core, and effecting an initial expansion of a portion of the sleeve to a larger diameter in an expansion zone so that the sleeve separates from the core and leaves a space between the sleeve and core. A fluid is introduced into the space under pressure via a fitting at the downstream end of the sleeve while continuously advancing the sleeve and core through the expansion zone. To begin the process, a permeable core is used, and the sleeve is extruded around and in contact with the permeable core.
    Type: Grant
    Filed: August 28, 1984
    Date of Patent: September 5, 1989
    Assignee: Cable Technology Laboratories, Inc.
    Inventors: Carlos Katz, Attila Dima
  • Patent number: 4859264
    Abstract: The irrigation hose comprises two tubes disposed one within the other, at least one of the tubes being grooved. The ungrooved tube forms with the groove or grooves of the other tube continuous secondary ducts over the entire length of the hose. Inlet ports and outlet ports delimit in the secondary ducts sections of a predetermined length, each yielding a flow capable of continuously drip-irrigating a plant in the area to be irrigated. The outlet ports and the inlet ports are distributed along spiral lines if the secondary ducts are straight and along straight lines constituting generatrices of the hose if the secondary ducts run along spirals.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: August 22, 1989
    Assignee: Maillefer SA
    Inventor: Bruno Buluschek
  • Patent number: 4854846
    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.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: August 8, 1989
    Assignee: Dayco Products, Inc.
    Inventor: Donald L. Oglesby
  • Patent number: 4842792
    Abstract: Preparation of a novel polyester fiber, such as a poly(ethylene terephthalate) fiber, having at least one continuous groove wherein the surface of the groove is rougher than the surface outside the groove is accomplished through a drafting process involving surface hydrolysis. The fibers have improved cover, softness, and wetting characteristics.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: June 27, 1989
    Assignee: Eastman Kodak Company
    Inventors: Shriram Bagrodia, Bobby M. Phillips
  • Patent number: 4839120
    Abstract: A method of extruding a ceramic batch supplied from a vacuum auger machine into a formed body by a plunger molding machine, included the steps of loosening and crushing a supplied ceramic batch in the vacuum auger machine, extruding the loosened and crushed ceramic batch from the vacuum auger machine into a formed columnar body which is of a size able to be inserted into a cylinder of the plunger molding machine, and extruding the formed columnar body from the plunger molding machine to form a formed body of a predetermined shape. An apparatus for extruding a ceramic batch includes a vacuum auger machine having of a vacuum kneading section for kneading a ceramic material to produce a ceramic batch, a columnar body forming section for forming the kneaded ceramic material into a columnar body, and a batch transfer section having an auger for transferring the ceramic batch to the columnar body forming section.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: June 13, 1989
    Assignee: NGK Insulators, Ltd.
    Inventors: Toshio Baba, Hajime Matsushita, Yasuji Katsuragawa
  • Patent number: 4818570
    Abstract: In a process for the production of smooth surfaced parts, a paste material, which includes paste or granule pieces which are coated with added pigment and then pressed back together, is applied, in the form of an extrusion or a coating, to a substrate. The extrusion or coating is subjected to a first, incomplete hardening, after which it is no longer flows freely under its own weight. The surface layer, containing added pigment, is then removed from a surface to be used. This surface is subsequently smoothed, and the hardening of the coating to form a hard material is completed. The smoothing and the completion of the hardening can occur in the same processing step as a shaping for the formation of separable shaped parts. The substrate can be inseparable from the hardened coating. The surface layer, containing added pigment, can be removed by mechanical means, solvents or abrasion by a suspension in liquid or air, if appropriate in the presence of ultrasound.
    Type: Grant
    Filed: July 14, 1987
    Date of Patent: April 4, 1989
    Inventor: Victor A. Milles
  • Patent number: 4808357
    Abstract: A process for forming discrete, shaped interlayer blanks comprising extruding thermoplastic melt into an endless, distortable straight-sided sheet having a gradient color band along one side, the melt forming the region of the sheet laterally of the color band extruding at a greater thickness than that forming the portion containing the color band, stretching the side of the sheet containing the region formed from the greater thickness melt more than the other side while extrusion continues to shape the sheet into an arcuate form of substantially uniform thickness having different radii along each edge, the edge of greater radius being on the side formed from the greater thickness melt, quenching the sheet to set the polymer, advancing the shaped sheet to a cutting station and cutting shaped quadrilateral sections out of the sheet having the gradient color band along one longitudinal side to form the blanks.
    Type: Grant
    Filed: November 17, 1987
    Date of Patent: February 28, 1989
    Assignee: Monsanto Company
    Inventors: David P. Bourcier, Robert A. Esposito
  • Patent number: 4808099
    Abstract: An apparatus for making extruded film tube having joined to its inside surface a closure strip extending generally transversely, preferably helically, relative to the axis of the tube and the tube and closure strip being adapted to be converted into a ribbon sheet form with the closure strip extending as individual closure strip sections across the ribbon sheet form at longitudinally spaced intervals, and adapted for making bags.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: February 28, 1989
    Assignee: Minigrip, Inc.
    Inventor: Donald L. Van Erden
  • Patent number: 4801502
    Abstract: Non-flammable, high-temperature resistant polyimide fibers have irregularly lobed or serrated cross-sections, a wool-like smooth hand and high brightness. They are produced by a dry-spinning process which is carried out in a spinning column, wherein a 20 to 40% solution of the polyimide is spun from spinnerets having circular orifices, the orifice numbers ranging from 20 to 800 and the orifice diameters from 100 to 300 .mu.m. An extrusion speed of between 20 and 100 m/min, a take-up speed of between 100 and 800 m/min, an amount of spin gas between 40 and 100 m.sup.3 /h under standard conditions and a spin gas temperature of between 200.degree. and 350.degree. C. are applied. The tows leaving the spinning column, which contain residual solvent from 5 to 25% by weight--based on dry polymer--and have a single filament titer of between 3.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: January 31, 1989
    Assignee: Chemiefaser Lenzing Aktiengesellschaft
    Inventors: Klaus Weinrotter, Thomas Jeszenszky, Heinrich Schmidt, Siegfried Baumann, Johann Kalleitner
  • Patent number: 4776998
    Abstract: Shaped articles, especially ones containing a plurality of fine through passages, are made from a composition containing a refractory particulate material by extrusion, cutting the extrudate, while vertically hanging or suspending into lengths while in the green deformable state by a high velocity water jet, and then calcining to bind the refractory particles together. Depending on the nature of the refractory material, the articles are of use as catalyst supports or precursors, adsorbents, or absorbents. The extrudate is extruded horizontally and allowed to sag into a gap between the extrusion die and a transport device, which is driven positively to maintain the degree of sag within predetermined limits, and the frequency of cutting depends on the rate of movement of the transport device.
    Type: Grant
    Filed: November 4, 1986
    Date of Patent: October 11, 1988
    Assignee: Imperial Chemical Industries PLC
    Inventors: Peter J. Davidson, John F. Davidson, Frank A. Kirk, Donald L. Ralph
  • Patent number: 4764324
    Abstract: A process for making a reinforced tubular product, especially a catheter, in a single extrusion step. A reinforcing member is heated when applied to an extruded thermoplastic catheter body of about its finished size which is softened by heating while tensioning the reinforcing member to control the surface deformation or penetration of the catheter wall by the reinforcing member to produce an irregular surface contour on the catheter body. The catheter body is then smoothed in a sizing die burying the reinforcement to form the finished product. The heating step may be in addition to or substituted by a curing step when a thermosetting or crosslinking material is used for the body. The reinforcement may be braid, or a helical wrap of one or more members applied at one or more controlled angles relative to the axis of the catheter to control the strength and torque transmission efficiency of the catheter.
    Type: Grant
    Filed: March 31, 1986
    Date of Patent: August 16, 1988
    Inventor: Warren Burnham
  • Patent number: 4759824
    Abstract: Shaped ammunication for tubular weapons in the form of nitrocellulose-based combustible cartridge cases are continuously produced in a screw extruder from an aqueous suspension, stabilizers, flammable fibrous material, binders and optionally plasticizers being supplied to the suspension. The fibre-like constituents are matted in kneading and pressing zones, accompanied by the simultaneous squeezing out of the water, being shaped to an endless tubular structure, which is then cut to the length of the individual cartridge cases and is optionally also pressed to the desired dimensions and shape. Advantageously use is made of a double shaft screw extruder with kneading and pressing segments, as well as a water outlet, which is provided at its end with a tubular die. A following pressing and cutting to length means is arranged behind the extruder.
    Type: Grant
    Filed: January 3, 1986
    Date of Patent: July 26, 1988
    Inventors: Dietmar Muller, Fred Volk
  • Patent number: 4758398
    Abstract: A method of preparing a plurality of thermoset resin preforms by extruding a rod, cooling the rod to retain its dimensional uniformity and to reduce further curing of the resin, forming a plurality of grooves in the rod, and fracturing the rod at the grooves to yield the preforms.
    Type: Grant
    Filed: October 7, 1986
    Date of Patent: July 19, 1988
    Assignee: The Dexter Corporation
    Inventors: John J. Sparapany, Lewis Erwin, Kevin J. Prey
  • Patent number: 4749535
    Abstract: An apparatus for molding of plastic products in which a softened plastic material is extruded from an extruder in the shape of belts or rods, the extruded material is introduced onto a main molding roll having an outer surface with a contour of the piece to be molded and the plastic material is formed into a shape corresponding to the outer surface of the main molding roll by utilizing the fluidity of the plastic material, followed by rapid cooling, to produce a plastic product having a curved shape.
    Type: Grant
    Filed: April 2, 1986
    Date of Patent: June 7, 1988
    Inventor: Yasuo Matsuda
  • Patent number: 4738609
    Abstract: An apparatus for making soap comprising, an extruder having a device for passing the soap toward a downstream portion of the extruder, an orifice plate adjacent the downstream end of the extruder having a relatively dull edge defining an opening to form an extrudate of the extruder, and a trimmer plate spaced dowstream from the orifice plate and having a sharp edge defining an opening sufficiently small to trim an outer portion of the extrudate and form a well compacted residue for recycle and desired surface characteristics of the soap.
    Type: Grant
    Filed: November 12, 1986
    Date of Patent: April 19, 1988
    Assignee: Colgate Palmolive Company
    Inventor: Cesare N. Marchesani
  • Patent number: 4735538
    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.
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: April 5, 1988
    Assignee: Metal Box p.l.c.
    Inventors: Leonard W. Reed, Robert M. S. Barr, David A. Dick
  • Patent number: 4711751
    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.
    Type: Grant
    Filed: January 11, 1985
    Date of Patent: December 8, 1987
    Assignee: Thermo Plastic Research Co., Ltd.
    Inventor: Lance W. Tipton
  • Patent number: 4711005
    Abstract: A new and improved method of forming slats for window blinds and the like from a continuous web of plastic material includes a feeder for directing the web longitudinally from a roll at a selected speed rate into a heating chamber including upper and lower plates defining a longitudinally extending heating path between opposite inlet and outlet ends. As the web moves along the path, opposite surfaces thereof are heated to an elevated temperature and the web material then moves into a molding and cooling chamber immediately adjacent the exit end of the heating chamber wherein the web is molded to provide a curved transverse cross-section while the web is cooled. The web is cooled to a temperature at a level selected to provide a permanent set in the longitudinally traveling web.
    Type: Grant
    Filed: July 14, 1986
    Date of Patent: December 8, 1987
    Assignee: Joanna Western Mills Company
    Inventor: A-Shen Chang
  • Patent number: 4698196
    Abstract: Apparatus for preparing seamless, creaseless, pliable, thin-walled tubes comprising means to extrude a moving continuous tube of polymeric film material from a die, means to radially stretch the continuous tube as it emerges from the die, means to longitudinally stretch the tube, and means to sever the tube while the tube is in motion to form tube segments while maintaining the tube substantially free of creases. This apparatus may be employed in a process to prepare seamless, creaseless, pliable, thin-walled tubes.
    Type: Grant
    Filed: December 24, 1985
    Date of Patent: October 6, 1987
    Assignee: Xerox Corporation
    Inventor: Ellis Fabian
  • Patent number: 4695418
    Abstract: In the manufacture of roof tiles comprising extruding a continuous shaped ribbon of tile forming material onto a succession of pallets, and cutting the ribbon where pallets adjoin to form individual green state tiles on pallets, there is performed the step of causing a cutting tool to engage with the upper surface of the ribbon only for part of the length of each pallet whereby a recess is formed in the upper surface of each tile. In a particular embodiment the recess is a channel cut in the tile at a location immediately downstream of the extruding step. The recess is also subsequently smoothed by applying a smoothing roll thereto.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: September 22, 1987
    Assignee: Redland Roof Tiles Limited
    Inventors: Robin M. Baker, Paul R. Sargeant, Ernest G. Papper, Bhusan K. Oberoi, Frank A. Smith, Malcolm C. Rae
  • Patent number: 4680068
    Abstract: A method and apparatus for forming a drum handling ring having an inverted frustoconical geometry to facilitate engagement of a conventional parrot beak gripper with the ring. The end of an advancing, straight strip of heated thermoplastic material, continuously provided by an extrusion head, is fed at a first location to the circular periphery of a continuously rotating, large diameter turntable where the strip is clamped thereto and then cooled so that the clamped portion of the strip thermally sets into an arcuate shape corresponding to the periphery of the turntable. At a second location diametrically opposed to the first, the now arcuate end portion of the strip is unclamped and guided away from the turntable periphery to a cutting station where the continuously advancing strip is cut into arcuate pieces each having an arc length generally corresponding to the desired circumference of a drum handling ring.
    Type: Grant
    Filed: July 7, 1986
    Date of Patent: July 14, 1987
    Inventors: Donald R. Hofstetter, Louis F. Fow, Jr.
  • Patent number: 4650624
    Abstract: Damage to the natural tone of acrylic fibres, produced according to a continuous dry spinning process, can be avoided if from 0.025 to 0.2% by weight of ethylene diamine tetra-acetic acid, based on the fibrous solids material, is added to the spinning solution.
    Type: Grant
    Filed: May 3, 1985
    Date of Patent: March 17, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ulrich Reinehr, Toni Herbertz
  • Patent number: 4563320
    Abstract: An extruder delivers an extrudate at a temperature in the low end of the extruding range between 250.degree. and 550.degree. F. between opposed rollers carrying mating dies. The dies are sprayed with mold release agent when away from the extrudate. The extrudate is cooled after leaving the region between a pair of rollers and may enter the region between other similar pairs of rollers. Cold plastic inserts may be inserted into molded items.
    Type: Grant
    Filed: November 26, 1984
    Date of Patent: January 7, 1986
    Assignee: Hummor, Inc.
    Inventor: Allan C. Morgan
  • Patent number: 4510109
    Abstract: Arrow fletchings (42,102) disclosed have curved vanes (50,114) inclined inwardly in a rearward direction to provide pockets (54,118) for restricting air flow while allowing vane flexing in a manner that moderates drag in response to wind changes. One fletching embodiment (42) is preferably made by plastic extrusion and a subsequent heat forming process and includes a vane (50) whose inner portion projects radially from its foot (44) and whose outer portion define its curved pocket (54). Another fletching embodiment (102) made from sheet plastic includes a vane (114) that projects tangentially from the arrow shaft on which its foot (104) is mounted and is curved to define the pocket (118) that restricts air flow. A fixture (68) for heat forming the pocket of the one fletching embodiment (42) and a method for making the other fletching embodiment (102) are also disclosed.
    Type: Grant
    Filed: March 25, 1983
    Date of Patent: April 9, 1985
    Inventor: Richard F. Carella
  • Patent number: 4470942
    Abstract: The invention relates to a process and an equipment to obtain a plate provided with holes directly by extruding plastic materials. The process consists in submitting the material coming out of an extruder head to expansion stresses according to more than one direction and in executing a plurality of perforations in said material submitted to expansion by means of perforating means; the equipment consists of a plurality of perforating devices provided with a reciprocating motion so that they can reach an interference position with respect to the material coming out of the extruder head and of means which, acting at the same time as the perforating devices, are suitable to produce an expansion of the extruded material.
    Type: Grant
    Filed: March 12, 1982
    Date of Patent: September 11, 1984
    Assignee: R.D.B. Plastotecnica S.p.A.
    Inventor: Mario Beretta
  • Patent number: 4448737
    Abstract: A system and a method for the production of thermoformable plastic foam material from a mix of plastic foam selvage and a foamable virgin plastic resin. Accordingly, the present invention provides for a selvage formed during the production of thermoformed foam material articles from a plastic foam sheet stock is recycled and admixed with the virgin foamable plastic resin, in that the material components are admixed in a feed hopper and then conducted from the feed hopper into a twin-screw compressor which will impart a positive forward feed to the compressible plastic materials conveyed therethrough.
    Type: Grant
    Filed: December 30, 1982
    Date of Patent: May 15, 1984
    Assignee: Mobil Oil Corporation
    Inventor: David E. Johnson
  • Patent number: 4435310
    Abstract: Striped detergent bars can be manufactured by several methods. The application of torque to a striped extruded log provides a bar with a spiral striping. The present invention proposes reversal of torque so that a sinusoidal striping is present on the bar.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: March 6, 1984
    Assignee: Lever Brothers Company
    Inventor: Michael R. Lowry
  • Patent number: T105401
    Abstract: Production of a high-strength, convoluted polyester staple fiber which includes use of a spinneret having a slot aperture having a width of greater than about 0.07 mm, and a length to width ratio of at least 2, spinning at a spin stretch factor of equal to or greater than 100N, where N is the number of elongated slots that make up each outlet orifice, at a spinning speed of greater than about 1500 m/min., drawing the fiber under amorphous retaining conditions by an amount greater than the natural draw ratio, mechanically crimping the fiber, cutting it to staple lengths, and relaxing the fiber 10 to 40%. The fiber is cotton-like. The preferred polyester is polyethylene terephthalate.
    Type: Grant
    Filed: February 16, 1984
    Date of Patent: May 7, 1985
    Inventors: Vikas M. Nadkarni, Hyunkook Shin