Developing A Surface Negative And Then A Surface Positive Mold Patents (Class 264/227)
  • Patent number: 4840764
    Abstract: A method for forming a cast replica of an article, including: forming an outer mold around the article with a first molding material, the outer mold having an inner surface substantially conforming to the outer surface of the article; separating the article from the outer mold; applying to the outer mold on its inner surface a predetermined thickness of a second molding material which is separable from the outer mold, the second molding material defining a hollow space at the interior thereof; filling the hollow space with a third molding material separable from the second molding material; allowing the third molding material to cure to form an inner mold; separating the second molding material from the outer mold and the inner mold; locating the inner mold or a reproduction thereof within the outer mold with a space between said outer mold and the inner mold representing the predetermined thickness; filling the space between the inner mold and the outer mold with a fourth molding material; allowing the fourt
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: June 20, 1989
    Inventor: Richard F. Cummins
  • Patent number: 4834927
    Abstract: On the basis of a hollow die including over-shell and a cap drawn onto a proximal connector of the die, an ear impression is produced directly in the auditory canal that is filled with ear impression material. Displaced ear impression material thereby flows through a channel in the cap into the hollow interior of the die. A negative is produced from the ear impression together with a screwed-on fixing star, this negative containing impressions of the points of the fixing star. After injection of otoplastic material and repositioning of a fixing star with a die, over-shell and cap into the fixing depressions, a finished otoplastic shell can then be produced from the negative.
    Type: Grant
    Filed: May 13, 1987
    Date of Patent: May 30, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ulrich Birkholz, Christof Haertl, Peter Nassler
  • Patent number: 4828777
    Abstract: The combination of a die simulating the outside contour of an in-the-ear hearing aid module with an over-shell end cap which is seated on a die connector or neck projecting through a proximal hole of the over-shell is immersed into fluid otoplastic shell material which is situated in the negative of an ear impression. The hardened blank is proximally and distally freed of otoplastic shell material and is also proximally freed from the cap such that the die or a remaining part of the die can be easily and unproblematically removed in distal direction, so that the over-shell with the otoplastic shell material seated thereon remains as a finished otoplastic shell.
    Type: Grant
    Filed: May 13, 1987
    Date of Patent: May 9, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ulrich Birkholz
  • Patent number: 4808360
    Abstract: A mold forming method in which a pattern is made of an organic material such as foamed polystyrene and at least a portion of the outer or inner surface of the mold pattern is covered by a thin coating, and surrounded with a mold material. The pattern is then dissolved by a solvent, leaving the coating undissolved. The coating is finally removed by a solvent contained in a slip which is poured into the cavity provided with the coating.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: February 28, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuo Natori, Takashi Shimaguchi, Toshihiro Yamada, Kazuaki Yokoi
  • Patent number: 4790893
    Abstract: A process for producing an information carrier containing recorded audio and/or video information wherein a web of a thermoplastic material is extruded onto the patterned surface of a metal master and pressure is applied to force said thermoplastic material into contact with the metal master. The thermpolastic material is cooled to a temperature below its softening point to form an imaged thermpolastic web which is separated from the metal master. Then a thin film of metal particles is deposited on the imaged surface of the thermoplastic web and said metallized thermpolastic web is laminated with a substrate carrying an uncured coating of a radiation curable resin. The resin is cured and individual information carriers are separated from the web of information carrying laminate. A center hole is placed in the separated individual information carriers, when appropriate.
    Type: Grant
    Filed: July 18, 1986
    Date of Patent: December 13, 1988
    Assignee: Hallmark Cards, Inc.
    Inventor: John B. Watkins
  • Patent number: 4781597
    Abstract: This invention relates to an article of manufacture and a method for making same, such as an artificial bird body used in taxidermy and essentially made to represent a plucked bird body using a polyurethane foam casting of the plucked carcass. The final foam casting is made in a two (2) step process. The first step consists of plucking the feathers from a bird so that the skin, muscles, connecting tissue and bones are intact in the bird body. Next, a casting is made using a specific procedure so that the bird is cast in the final pose desired. Special slots are made to insert the tibia and the tail portions of the bird. An additional provision is made for the insertion of a heavy wire for giving structural strength to the bird body and for mounting the neck and/or head of the bird. A second casting is then made of the reconfigured first casting and the second casting used for the final product.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: November 1, 1988
    Inventor: David M. Cowley
  • Patent number: 4770824
    Abstract: A casting die, for forming a segmented mirror, is formed by the steps including:providing a negative or positive casting of the desired continuous surface shape;cutting the casting into small segments to form non-circular gaps between segment cross-sections;translating the segments relative to one another in a common direction to contact a shaping surface or surfaces, while maintaining constant gap widths between the segments;joining the segments to form a unitary body by adding filler material to the gaps.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: September 13, 1988
    Assignee: Roxor Corporation
    Inventor: C. James Blom
  • Patent number: 4764327
    Abstract: A process of producing plastic-molded printed circuit boards by injection-molding a heat resistant plastic to form a plastic molding having many perforations and forming a conductive layer on the molding, which comprises molding the heat resistant plastic using a mold for injection-molding obtained by preparing a die set for injection-molding composed of a fixed side metal platen having at least an inlet for molten resin and forming a space for installing mold part(s), a stripper metal platen having, if necessary, an inlet for molten resin connected to the fixed side metal platen and forming a space for installing mold part(s), and a movable side metal platen forming a space for installing mold part(s); and assembling a pair of molds composed of a mold I having a concaved portion for cavity and a mold II having perforations for passing hard pins for forming holes and, if desired, a concaved portion for cavity, said molds being formed by a cured resin composition or a composite of a metal and a cured resin com
    Type: Grant
    Filed: January 14, 1987
    Date of Patent: August 16, 1988
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Mitsuru Nozaki, Hirokatsu Nakamura
  • Patent number: 4758399
    Abstract: A method of forming a substrate for manufacturing single crystal thin films, wherein the substrate is a replica pattern of a monocrystalline or single crystal cleavage plane. Such replica pattern may be formed by pressing a material in a softened state against the cleavage plane of the single crystal, with subsequent hardening, and also, by subjecting the single crystal cleavage plane to vapor deposition or plating, and thereafter removing the formed layer from the single crystal cleavage plane.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: July 19, 1988
    Assignee: Yoshihiro Hamakawa
    Inventors: Yoshihiro Hamakawa, Hideyuki Takakura
  • Patent number: 4752229
    Abstract: Accurate heads are prepared by molding processes for the use by taxidermists in preparing fish for permanent display. The heads are removed from the silicone rubber mold just after the molding composition has achieved its peak exotherm and becomes very firm.
    Type: Grant
    Filed: October 27, 1986
    Date of Patent: June 21, 1988
    Assignee: Tru-Form Fish Heads
    Inventors: Larry B. Clingerman, Victor M. Franco, Jr.
  • Patent number: 4735752
    Abstract: A taxidermic specimen and a method of formation thereof is disclosed. A preliminary negative mold (28) is formed by applying an alginate material to the jaw structure of the animal carcass. Fibers (50) are disposed within the depressions (30, 32 and 34) to provide tooth stains. Tooth-colored acrylic material is alternately poured in layers into the teeth depressions (30, 32 and 34) of the preliminary mold (28). The hardened acrylic teeth (44, 46, 48) are removed and chamfered around the gingival line (40). The teeth are reinserted into the preliminary mold (28) and covered by palate and gum forming fiberglass. Natural appearing colorations are provided comprising selected colored threads (52) near the surface of the gum structure. The composite tooth, gum and palate structure forms the master mold (54). From the master mold (54) a final rubber production mold is formed which is used to construct additional production taxidermic specimens in the same manner in which the master mold (54) was formed.
    Type: Grant
    Filed: March 25, 1986
    Date of Patent: April 5, 1988
    Inventor: Eugene Negethon, Jr.
  • Patent number: 4735754
    Abstract: Disclosed is a method of fabricating a prosthetic member (112) having personalized features of the patient, and being formed to provide an individualized fit to the patient's extremity (18). A rigid jacket (30, 32) is first formed around the uninsured foot (10) and the amputated extremity (18). The limb characteristics are impressed into an alginate (44) lining within the jackets (30, 32). A stone material poured into the alginate lining (44) forms stone models (48, 50) of the patient's limbs. A wax preliminary model (64) is scuplted in the likeness of the stone foot model (48) and used to form final stone mold halves (100, 102). The contour of the stone extremity model (50) is adjusted according to the tissue texture of the patient to provide an individualized fit. A gelatinous silicone is injected inside the final mold (100, 102) and allowed to form around the extremity model (50) to thereby provide the body of the prosthetic member (112) and the conformal sleeve (132 ).
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: April 5, 1988
    Inventor: Horst Buckner
  • Patent number: 4735759
    Abstract: A hearing aid including a plug that is tailored to snugly fit into the auditory canal of the user's ear, and that has a preshaped component assembly embedded therein, the component assembly comprising shell-like members that are interconnected to each other and that have the electrical components of the hearing aid mounted therein, the members being prearranged to achieve a configuration generally similar to the shape of the plug and being secured in end-to-end position for mounting interiorly in a negative impression in a mold as formed from the user's auditory canal, the assembled members being embedded in the negative impression in the mold upon pouring of a quick setting plastic material into the negative impression, thereby permanently fixing the preshaped assembly in the plug that is formed as the quick setting plastic material hardens around the assembled preshaped members.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: April 5, 1988
    Inventor: Gaspare Bellafiore
  • Patent number: 4718957
    Abstract: The process for fabricating a reusable artifical fingernail which enjoys a tight tolerance complimental fit with the natural nail substrate as a result of the method of fabrication. The process may involve the use of, (A) the natural nail [Direct Technique], of (B) a model of the natural [Indirect Technique] as a substrate in conjunction in each case with a secondary substrate forming an extension of the nail, and digit to accept in a continuous fashion a release agent and a coating of a curable material forming an artifical nail curing the acrylic material, preferrably by blue light source in the visible spectrum. The preferable material is an acrylic and removing the artifical nail so created, trimming flash and shaping it to the desired final configuration and reapplying with a non-permanent adhesive material.
    Type: Grant
    Filed: July 24, 1986
    Date of Patent: January 12, 1988
    Inventor: Kenneth C. Sensenbrenner
  • Patent number: 4708836
    Abstract: A cranium is firstly produced form an epoxy resin, whose thickness is adapted so that the compressive strength at a given point is the same as at the corresponding point of a real cranium. This is followed by the fitting of the soft parts, i.e. the brain, eyeballs, flats of the ear and nasal pyramid. These members are made from a silicone to which a variable quantity of oil has been added to ensure that their hardness is the same as that of the corresponding real organs. The cranium is then placed on a support permitting the correct orientation thereof in the mould where the skin is cast.
    Type: Grant
    Filed: March 20, 1986
    Date of Patent: November 24, 1987
    Assignees: Commissariat a l'Energie Atomique, L'Etat Francais
    Inventors: Robert Gain, Jacques Simon, Andre Pasturel, Marc Roger
  • Patent number: 4696780
    Abstract: In a method of manufacturing a prosthesis cuff to receive an amputation stump, particularly for a lower-leg prosthesis, a positive cast of the stump is positioned in an expanded and heat shrinkable rough cuff of a plastics material, whereupon the rough cuff is caused by heating and vacuum-forming to adjust to the surface contour of the stump. The positive cast is subsequently removed. A connecting element for the prosthesis is provided on the rough cuff, for example having formation embedded in the plastics material.
    Type: Grant
    Filed: December 17, 1984
    Date of Patent: September 29, 1987
    Assignee: Landstingens Inkopscentral LIC
    Inventor: Lars Hagglund
  • Patent number: 4682643
    Abstract: An investment casting process employs a low-cost plastic pattern manufactured by machining. A mold is cast around the plastic pattern following which the pattern is removed from the mold to leave a mold cavity which molten metal or the like may be poured to produce a finished part. Reusable plastic patterns may be formed by casing silastic rubber. The silastic rubber patterns may be mechanically separated from the mold without damaging the pattern.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: July 28, 1987
    Assignee: Nu Con Corporation
    Inventors: David L. Bernhardt, Neno T. Nenov
  • Patent number: 4668457
    Abstract: Resin pieces having a fat color corresponding to fat meats are molded and placed in a female mold. Resin having a lean meat color is pured in the female mold, and solidified resin is taken out from the mold.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: May 26, 1987
    Assignee: National Institute of Animal Industry
    Inventors: Hiroyasu Nakai, Toshio Ikeda, Shiro Ando, Kyohei Ozutsumi
  • Patent number: 4663102
    Abstract: A stimulator for penile erection comprises a body member which may be inserted into the rectum of a user, the body member being so shaped as to closely conform to the topological configuration of the rectum from the anal area to a site adjacent to the prostate gland. Within the body member is electrical circuitry for generating a neutrally stimulating electrical signal. Electrodes, placed at particular locations on the surface of the body member, apply the signal to the user. At least one of the electrodes closely contacts the prostate gland when the body member is operatively disposed, at a region or spot on the prostate gland previously determined to be sensitive to electrical stimulation.
    Type: Grant
    Filed: March 25, 1985
    Date of Patent: May 5, 1987
    Assignee: Biosonics, Inc.
    Inventors: Henry S. Brenman, Philip Katz, Harold L. Schwartz
  • Patent number: 4661187
    Abstract: Prosthetic devices of utilitarian, yet natural and unprecedented life-like appearance, are formed of durable elastomers. A seamless flexible negative mold of a biological body member selected to form the basic model is made by painting on to it nylon mesh-reinforced silicone with direct monitoring and correction of the positioning of the parts. A positive wax model is cast in the mold and subsequently modified by sculpturing to the requirements of the individual for whom the prosthesis is being developed. From the master wax model a negative metal mold is made by electroplating. New and unique provisions for ventilation to effectively remove from the molds solvents of the elastomer dispersions greatly improve the quality and rapidity of production. Invented methods of creating ventilation ports without damage to the critical interior surface of the molds and of degassing the dispersions to eliminate bubble defects are employed.
    Type: Grant
    Filed: April 3, 1985
    Date of Patent: April 28, 1987
    Inventor: Robert W. Beasley
  • Patent number: 4656722
    Abstract: An improved method of forming a decorative panel of molded plastic comprising the steps of constructing a form having a detailed masonry surface; covering the detailed surface with a mold release material; applying a thin layer of gel coat over the mold release; applying a plurality of layers of fiberglass matte and resin over the gel coat layer; allowing the plurality of fiberglass matte and resin layers to harden thereby forming a heat resistant mold having a female side being formed against the detailed surface and a side opposite from the female side; removing the mold from the form; perforating the mold thereby providing fluid communication between the two sides; connecting a vacuum apparatus to the side opposite of the mold; placing a sheet of high impact plastic above and adjacent the female side of the mold; activating a heater thereby heating the plastic sheet to a pliable state; activating the vacuum apparatus thereby drawing the plastic sheet into the female side of the mold; and removing the forme
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: April 14, 1987
    Inventor: Larry Armstrong
  • Patent number: 4634484
    Abstract: Leather sheets having desired grain pattern are mounted on a roller with edges abutting. Onto the surface of the grain pattern a silicone synthetic resin is applied as a uniformly thick coating with a coating knife as the roller rotates. The resin is hardened into a matrix. It is then peeled off the grain pattern. The grain pattern in the matrix is interrupted where the leather sheets abutted. The matrix is placed with the pattern outward on a roller whose diameter pretty much matches the diameter of the embossing roller to be produced. The surface of a tubular thermoplastic film is embossed by contact with the cylindrical matrix under heat and pressure. The embossed surface of the thermoplastic film is once again overembossed under heat and pressure in the areas along the abutting edges of the natural grain pattern on the roller, so that an endless positive impression without seams in the grain's pattern is produced.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: January 6, 1987
    Assignee: J.H. Benecke GmbH
    Inventor: Werner Wagner
  • Patent number: 4615855
    Abstract: A process for forming a hollow, cured composite article. The process includes steps of making a plug from a meltable material. The plug is covered with a polymerizable material and the covered plug is inserted into a cavity formed in a thermally-expansive and heat-resistant polymer held within a rigid container. The almost filled container is covered and the container and part are heated to cause curing of the polymerizable covering. The cured assembly is removed from the thermally-expansive and heat-resistant polymer and heated to an extent sufficient to melt the core.
    Type: Grant
    Filed: March 15, 1984
    Date of Patent: October 7, 1986
    Assignee: Programmed Composites, Inc.
    Inventors: Edward Orlowski, George D. Walker
  • Patent number: 4603024
    Abstract: A print is made of the sole of a foot in a block (1) of modelling clay. If necessary the print is corrected for orthopedic reasons. A rigid shape (23) is cast in the print, and after unmolding, the contour (26) of a sole to be made is marked on the shape in relief. The shape is then used to mark said contour in hollow form in the footprint. The block is then cut through along said contour and the central portion of the block is removed. The rigid shape is reinserted in the remaining peripheral portion of the footprint, and a sole is cast inside the peripheral portion and on the rigid shape. A first sole may be made in a single session in the presence of the patient. Thereafter, the rigid shape may be conserved, and used to make any subsequent soles that may be necessary without requiring the patient to be present.
    Type: Grant
    Filed: February 28, 1985
    Date of Patent: July 29, 1986
    Assignee: Sipse
    Inventor: Marc Denis
  • Patent number: 4601867
    Abstract: Very large tools can be cast-to-size by making a pattern of the article to be formed by the tool, laying the pattern up in a pattern box, applying a release coat and coating the pattern and box with a tough, curable tool surface layer. A small amount of epoxy filled with a thermally conductive particulate filler is cast into the pattern box before the surface layer fully cures. Relatively large chunks of thermally conductive material are added to the box which are covered with additional cast epoxy. The cure of the epoxy is controlled to effect complete cure at room temperature within a few days but never to exceed a peak cure temperature above about 70.degree. C.
    Type: Grant
    Filed: July 3, 1984
    Date of Patent: July 22, 1986
    Assignee: General Motors Corporation
    Inventors: William A. Martell, Ladislaus Weiss
  • Patent number: 4579708
    Abstract: A method of forming a resinous embossing plate adapted for use in an embossing and diecutting press for embossing a design onto paper greeting cards. The method comprises providing a line sketch of a design, making a photographic negative of the line sketch, and using the negative to apply the line sketch to both sides of a thin sheet of soft embossable material. Manual indenting of the design into the embossable sheet to provide a female matrix on one side of the embossable sheet. The embossed sheet is then reversed, so that the male portion of the matrix design faces upwardly, and disposed in a mold enclosure. Liquid plastic and fibrous reinforcing material is added to form a relatively low cost embossing plate. Plastic negative of the embossing plate is used in the press in conjunction with the embossing plate, for embossing the design onto the paper greeting card stock.
    Type: Grant
    Filed: October 17, 1983
    Date of Patent: April 1, 1986
    Assignee: American Greetings Corporation
    Inventor: James Rosart
  • Patent number: 4571277
    Abstract: An apparatus and method for cold retreading or recapping of the running surface of a vehicle tire. A rubber, rope and cloth mold larger in diameter than the recap tires produced in it is produced utilizing a new tire male mold covered with perforated polypropylene film, uncured rubber with nylon rope at its edges and highly stretchable cloth enclosed in an envelope and cured by application of pressure and heat. A larger male mold is used to make the final female mold directly, or a like-size male mold is used to make an intermediate mold which is used to produce a tread ring that is stretched to form a larger diameter male mold from which a final mold is prepared. The somewhat flexible, compressible final female mold thus produced is then utilized in recapping tires by positioning it around a prepared tire carcass coated with cement, a layer of uncured rubber, and a sheet of perforated polypropylene film.
    Type: Grant
    Filed: August 26, 1982
    Date of Patent: February 18, 1986
    Assignee: An-Rix, Inc.
    Inventor: Leon C. Goldstein
  • Patent number: 4551297
    Abstract: A method for producing the matrix for the embossing cylinder which has a uniform pattern design in the marginal areas adjoining the abutment where the ends of the blanket are joined to form the tube comprising (1) casting liquid silicone rubber on a sheet of leather having the desired grain and vulcanizing the silicone, (2) using the matrix thus formed to emboss, under heat and pressure in a press, a rectangular sheet of thermoplastic resin such as polyvinyl chloride film, (3) forming the embossed sheet into a tube, (4) placing the portion of the tube having abutting edges in a narrow platen press and reembossing the area surrounding the abutment with the silicone rubber matrix to mask the impression of the joint and provide a continuous uninterrupted pattern, and (5) using the positively-embossed thermoplastic sheet as a matrix for casting vulcanizable silicone rubber to form a negatively-embossed matrix for use as a blanket on an embossing roll.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: November 5, 1985
    Assignee: J. H. Benecke GmbH
    Inventors: BoHugo, Klaus Heimrich, Gustav Hildebrandt, Heinrich Kracke, Johannes Richter
  • Patent number: 4547941
    Abstract: The cast iron housing of a pump for conveying gravel or the like can be repaired by inserting into a recess in its internal surface a casting which at least substantially fills the recess. The recess develops as a result of washout, cavitation and/or other influences when the housing is in use. The casting is obtained by pouring molten metal into an impression which is formed in a mold by a pattern obtained by filling the recess with a hardenable plastic surface. The impression is overlapped by a cover having a surface which is complementary to the internal surface of the housing, and such cover is used for admission of molten metal as well as for escape of air from the impression. The casting is fastened to the housing by bolts portions of which are embedded in the casting during pouring of molten metal and extend through complementary holes of the housing or through the deepmost portion of the recess if the latter extends all the way between the internal and external surfaces of the housing.
    Type: Grant
    Filed: March 9, 1983
    Date of Patent: October 22, 1985
    Assignee: Soudbrase-Schweisstechnik GmbH
    Inventor: Gudrun Meier
  • Patent number: 4541977
    Abstract: Method for producing a separating nozzle element including a separating body and terminal plates, for the separation of a gaseous or vaporous mixture, wherein the separating body comprises separating structures which penetrate the separating body and define separating chambers and gas conduits, and the terminal plates are provided with channels for the intake and discharge of gas streams. A mold layer is produced which contains negative outlines of the separating structures. Thereafter, the negative outlines of the mold layer are filled with a structure material which is compatible with the gaseous or vaporous mixture to be separated to form the separating structures. The mold layer containing the negative outlines of the separating structure is produced by shaping the mold layer from a reusable tool provided with the positive outlines of the separating structures.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: September 17, 1985
    Assignee: Kernforschungszentrum Karlsruhe GmbH
    Inventors: Erwin Becker, Wilhelm Bier, Wolfgang Ehrfeld, Dietrich Munchmeyer
  • Patent number: 4536364
    Abstract: A mould part which is intended to be brought together with at least one other mould part, to form a closed mould cavity in which plastics objects can be shaped. The mould part comprises a composite mould body which includes a support section (10) made of rigid material and having a surface whose shape corresponds to the shape of the object to be formed, and a mould shell (2,3,4) which is detachably arranged on said surface and which is suitably made from a plastics material having an extremely fine surface which serves as the moulding surface. The mould shell can be readily replaced, at low cost, with a new mould shell, after having been in use for a given length of time. The invention also relates to a method for manufacturing mould parts in accordance with the above, and to the use of such mould parts.
    Type: Grant
    Filed: December 21, 1983
    Date of Patent: August 20, 1985
    Inventor: Kjell J. Lindskog
  • Patent number: 4500375
    Abstract: An apparatus and method for cold retreading of the running surface of a vehicle tire. A rubber and cloth mold is produced utilizing a new tire male mold covered with perforated polyethylene film, uncured rubber and highly stretchable cloth enclosed in an envelope and cured by application of pressure and heat. The somewhat flexible female mold thus produced is then utilized in recapping tires by positioning it around a prepared tire carcass coated with cement, a layer of uncured rubber, and a sheet of perforated polyethylene film. The mold and tire assembly is then enclosed in an envelope, and like assemblies are placed in a chamber where curing of the rubber layer is accomplished by inflation of the tire carcass, evacuation of the envelope, pressurization of the chamber and application of heat.
    Type: Grant
    Filed: March 24, 1982
    Date of Patent: February 19, 1985
    Assignee: An-Rix, Inc.
    Inventor: Leon C. Goldstein
  • Patent number: 4478769
    Abstract: Cylindrical embossing tools are constructed from one or more masters formed by accurately scribing the face of a substrate along three axes in the face to produce a pattern of tetrahedrons. The plurality of masters, or replicated copies made from a single master, are assembled in a fixture and seamless copies are made by electrodeposition of nickel using various shielding and grinding methods to provide replicated copies of uniform thickness. The replicated copies are assembled and used to form larger electroforms until a generally cylindrical embossing tool of the correct width and circumference is created. Novel processes and apparatus are provided for removing the electroformed cylindrical tool from its mother cylinder.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: October 23, 1984
    Assignee: Amerace Corporation
    Inventors: Robert M. Pricone, Anthony J. Montalbano
  • Patent number: 4454090
    Abstract: A method of forming the bridge portion of a conventional eyeglass frame to the exact configuration and dimension of a bridge portion of a predetermined wearer's nose and securing the formed bridge portion to a conventional eyeglass frame. Proper fitting of the formed bridge portion to the wearer's nose is thereby accomplished and slipping of the eyeglasses from the nose is thereby eliminated.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: June 12, 1984
    Assignee: International Flavors & Fragrances Inc.
    Inventor: Luis E. Saumell
  • Patent number: 4401492
    Abstract: A method of making a mandrel for a breast prosthesis in which a negative cast is formed of the wearer's remaining breast and the area of the missing breast. A positive cast is formed of the negative cast and a model is made of the missing breast. A flexible mold is formed over the modeled breast and a portion of the positive cast. The flexible mold together with the molded breast are removed from the positive cast. An additional flexible mold is formed over the rear of the modeled breast to form a rear wall. The rear wall is removed and the modeled breast is discarded. The forward and rear walls are secured together to form a cavity. Fiberglass resin fill is inserted into the cavity and the resin is cured until it hardens to form the mandrel.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: August 30, 1983
    Inventor: Arthur M. Pfrommer
  • Patent number: 4396569
    Abstract: A method of duplicating shapes embodying resinous material and more particularly fiber reinforced resinous material is taught. The method includes the formation of a mold separation sheet conforming to the mold contours, placing the separation sheet within the mold and charging the mold with the desired resinous mixture. Upon curing of the resinous mixture and ejection of the article from the mold the separation sheet is removed and discarded.
    Type: Grant
    Filed: October 26, 1981
    Date of Patent: August 2, 1983
    Assignee: Kelsey-Hayes Company
    Inventor: Harold J. Reikowski
  • Patent number: 4394341
    Abstract: An improvement is disclosed in the matrixing process employed in the manufacture of molded records. The improvement consists of using an insert in the matrixing process which is secured to the center portion of the matrix to be duplicated prior to electroforming a replica on the surface of the matrix. Metal is then electroformed over the surface of the matrix and the insert to form the replica and the insert is thereafter used to apply force at the center portion of the replica to force it away from the matrix on which it is formed.
    Type: Grant
    Filed: February 1, 1982
    Date of Patent: July 19, 1983
    Assignee: RCA Corporation
    Inventor: Donald J. Wierschke
  • Patent number: 4381963
    Abstract: Identical half-section shells of microscopic size, such as hemispherical shells from which spherical laser fusion targets can be made are capable of mass production by micro fabrication molding techniques. A body (preferably a hollow glass microsphere which is called a glass microballoon) provides a pattern for the hemispherical shells, and is used to produce an original mold section. One or more master molds are formed from this original mold section by replication. Many identical replica molds are made by casting soluble material onto the master mold and removing them therefrom. The replica molds are coated with one or more layers which will form the hemispherical shell wall. The material coating the flat background around the hemispherical cavity is referred to as the flange and is removed to form free standing shells. In order to remove the flange material, the coated replica molds are overcoated with a soluble material which is etched away to the level of the flange.
    Type: Grant
    Filed: July 30, 1980
    Date of Patent: May 3, 1983
    Assignee: The University of Rochester
    Inventors: Irving S. Goldstein, Franklin D. Kalk, Harry W. Deckman
  • Patent number: 4353850
    Abstract: A bowling ball according to one embodiment of the present invention has a hollow member (16), or a member of less specific gravity than the mass of the bowling ball, disposed therein with its centroid displaced from the geometric center of the ball. The lighter weight member in the ball permits the use of a dense polymerizable composition for the basic mass of the ball. The ball is molded without the usual shell so that it has a resilient striking surface for maximum impact and pin carry. In another embodiment, a member (46) of a higher specific gravity than that of the polymerizable mass is added generally on the same axis as the lighter weight member (42) to increase the eccentricity of the ball and give it even more driving power upon impact with the pins.
    Type: Grant
    Filed: February 29, 1980
    Date of Patent: October 12, 1982
    Assignee: GMSG, Inc.
    Inventor: Gene W. MacDonald
  • Patent number: 4312826
    Abstract: This invention relates to the method of producing a flexible, life-like model of physiological organs. These models are produced by injecting under pressure for a predetermined time a settable material such as silicone. The organ is then digested in a solution leaving a solid fabricated model. A multi-layered mold is fabricated around the solid model and once formed, is disassembled to remove said model. The mold is then reassembled and after proper coating is filled with liquid wax or similar material which is permitted to solidify. The mold is again disassembled and the wax model removed. The surface of the wax model can then be polished and otherwise cleaned prior to dipping in a settable liquid such as silicone which allows a build-up coating to be applied to such wax model. The thus coated model is then placed in boiling water or other environment to melt out the core to form a hollow casting by the lost wax technique.
    Type: Grant
    Filed: October 19, 1979
    Date of Patent: January 26, 1982
    Inventor: David P. Colvin
  • Patent number: 4279852
    Abstract: A method of producing an indicia transferring surface including affixing an inert material in the shape of indicia to a base sheet containing a curing inhibitor coating. A curable compound is placed on the surface of the base sheet in contact with the indicia shaped inert material and is allowed to cure. After a curing period, the curable compound is separated from the base sheet. The curable compound includes a cured portion and an uncured portion. The uncured portion is removed, leaving raised areas of the cured compound that were in contact with the indicia shaped inert material. The raised areas may then be used to transfer the impression of the indicia to another surface.
    Type: Grant
    Filed: March 6, 1980
    Date of Patent: July 21, 1981
    Inventor: Rudolph H. Engelmann
  • Patent number: 4277548
    Abstract: A process for the accurate generation and production of electrical lead lines and the like on a charge plate for use in an ink jet printing system is provided. In the process, a single master charge plate is utilized both as a model to produce molded charge plate blanks and also as a mask for generating charge plate artwork. Because the same master plate is utilized, any minor variations in the size, spacing, or alignment of orifices on the plate will be duplicated for both the blank, molded charge plate structure and the electrical artwork, permitting accurate alignment of the artwork to the orifices in the blank.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: July 7, 1981
    Assignee: The Mead Corporation
    Inventor: James L. Vedder
  • Patent number: 4272878
    Abstract: An anterior total contact hyperextension orthosis apparatus method of making a hyperextension orthosis. A stockinette is placed on a patient's body and marked for pre-determined patient features. A cast is formed on the patient's body for making a drape mold. The stockinette markings transfer to the cast and to the mold. The mold is modified including conforming the mold to the measured patient's breast portion and breast position, and the orthosis body is drape formed on the mold. The orthosis body is a molded plastic material having a breast support portion formed to be supported on the patient's breast, along with a pubic support portion and a center support portion formed between the breast support portion and the pubic support portion to conform to the patient's body therebetween to apply pressure primarily to soft tissue. Straps are attached to the anterior body portion and to a lumber pad for attaching the brace to the patient.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: June 16, 1981
    Inventor: Michael B. Danforth
  • Patent number: 4272476
    Abstract: A ball nut and screw assembly is provided with a molded internal return system for a train of balls drivingly interconnecting the nut and screw. A ball nut with an internal crossover is used as a master mold to produce an imprint mold which positively profiles the helical groove and the cross of the master mold. The imprint mold is positioned in a blank nut and a thermal set resin is supplied to radial openings formed in the blank nut which subsequently hardens into a plug with an internal crossover channel like that of the master mold.
    Type: Grant
    Filed: November 7, 1979
    Date of Patent: June 9, 1981
    Assignee: General Motors Corporation
    Inventor: Robert L. Benton
  • Patent number: 4250135
    Abstract: The present invention is directed toward the production of a roller or rollers which impart to plastic material in strip form and of indeterminate length a surface resembling a sueded material. The produced surface is seamless and continuous. Heretofore plastic material to reproduce sueded finish was not and could not be produced with an embossing roller since an embossing roller did not reproduce the genuine suede look or feel. Hand engraved rollers, etched rollers and the like have failed to give a genuine suede look to plastic material and sheeting. Small area sections may be reproduced by hand engraved flat plates then abrading of sheet or roll material which is expensive and wasteful has also been accomplished. Embossing rolls have been used for producing special surfaces such as skin reproductions for example, lizzard, alligator, etc.
    Type: Grant
    Filed: May 17, 1979
    Date of Patent: February 10, 1981
    Inventor: Peter C. Orsini
  • Patent number: 4231982
    Abstract: An exact replica of a tool for deep drawing, moulding, extruding and the like is manufactured by a method according to the present invention by thermally spraying the wearing surface of the tool to be produced onto a negative replica of the tool to be produced, said last replica being constituted of an easily fusible metal with a lower melting point than the plastic material used for backing up (1) the easily fusible negative replica and (2) the thermally sprayed wearing surface of the tool. According to the method of the invention the wearing surface of the tool can be constituted of steel, carbide or oxide.
    Type: Grant
    Filed: May 20, 1975
    Date of Patent: November 4, 1980
    Assignee: AB Volvo
    Inventor: Hans B. E. Jansson
  • Patent number: 4222983
    Abstract: Impression compositions containing (a) an organopolysiloxane having at least two alkenyl groups and containing at least 20 mol percent of monoorganosiloxane units, (b) an organopolysiloxane having at least 3 Si-bonded hydrogen atoms per molecule, (c) a catalyst which promotes the addition of Si-bonded hydrogen atoms to alkenyl groups and (d) 30 to 90 percent by weight of a filler, based on the total weight of the composition. Impressions are obtained by applying a composition containing components (a), (b), (c) and (d) to a surface of which an impression is to be made, crosslinking said composition and thereafter removing the formed structure from the contacted surface.
    Type: Grant
    Filed: July 27, 1978
    Date of Patent: September 16, 1980
    Assignee: Wacker-Chemie GmbH
    Inventors: Peter August, Wolfgang Hechtl, Richard Schmidlkofer
  • Patent number: 4198364
    Abstract: A shapeable matrix is provided for use in making of graphic art reproductions and in particular as a mold in forming of printing plates and other marking items.
    Type: Grant
    Filed: September 18, 1978
    Date of Patent: April 15, 1980
    Assignee: Fiberite Corporation
    Inventor: William A. Laurie
  • Patent number: 4154282
    Abstract: A preform mold space is formed by two mold sections spaced from each other. A gem is positioned in the mold space, and a hardenable preform wax-like material is introduced into the mold space and into supporting contact with the gem to thereby form a preform model upon hardening of the wax-like material. The preform model is removed from the mold space and embedded in hardenable embedding material so as to form a mold cavity about the exterior of the preform model upon hardening of the embedding material. Simultaneously with the hardening process the wax-like material is melted and removed from the mold cavity while the gem remains embedded in the mold. A heated molten hardenable metal material is then introduced into the mold cavity. The hardened metal material supportingly engages different facets of the gem and fixedly anchors the latter in the article of jewelry formed by the disclosed method.
    Type: Grant
    Filed: May 17, 1977
    Date of Patent: May 15, 1979
    Assignee: J. E. Hammer & Sohne
    Inventor: Herbert Kull
  • Patent number: RE31476
    Abstract: A process for forming a removable dental cast embedded with a plastic, threaded, cast ejector button, and apparatus for fabricating a plurality of cast ejector buttons comprised of a mold device including an upper plate containing a plurality of mold cavities, and a base plate incorporating coil spring means for resiliently maintaining the upper plate in a predetermined spaced-apart and open relation thereto and a plurality of rigid support elements attached, at their bottom ends, in vertically-upright relation on the base plate and slidably engaged, at their upper ends, in a bottom opening in each upper plate-mold cavity and extending in overlapping relation into the respective cavity. The upper ends of each rigid support element are threaded so that, when the mold cavities are poured with and filled by a suitable material, in the plastic flow form that is allowed to set for a specified period, a separate and internally threaded plastic cast ejector button is formed in each cavity.
    Type: Grant
    Filed: March 24, 1978
    Date of Patent: December 27, 1983
    Inventor: Roger W. Mercer