Patents Assigned to Dart Industries Inc.
  • Patent number: 3964310
    Abstract: A fluid flow meter of the variable area flow passage type is provided wherein the variation in said flow passage area is effected by the displacement of a control boundary which is supported by an annular diaphragm element. Said control boundary is shaped and sized so that the overall displacement required for the flow rate range desired is within the stroke capacity delivered by the free flexing action of said diaphragm element, thereby achieving substantially constant differential pressure operation at a very reasonable value which is due almost entirely to gravity. The resulting unit is very compact and stable and is characterized by very smooth linear response between vertical displacement and fluid flow rate. Said vertical displacement can be measured by various means but is preferably transduced to an equally linear, smooth and steady electrical signal by a direct connection with a specially adapted differential transformer.
    Type: Grant
    Filed: May 17, 1974
    Date of Patent: June 22, 1976
    Assignee: Dart Industries Inc.
    Inventor: Nyyrikki K. Stenberg
  • Patent number: 3964602
    Abstract: A multi-purpose receptacle to support various culinary implements and having interrelated supporting surfaces of varying configurations to retain such implements.
    Type: Grant
    Filed: August 5, 1974
    Date of Patent: June 22, 1976
    Assignee: Dart Industries Inc.
    Inventor: Harold P. Ashton
  • Patent number: 3960987
    Abstract: Propylene, for example, is polymerized with crystalline TiCl.sub.3 --AlCl.sub.3 and diethylaluminum monochloride catalyst at a rate of at least 300 lbs. polymer/lb. catalyst/hr. based on TiCl.sub.3 with partial H.sub.2 pressure of about 150 to about 1000 psi and sufficient total pressure to maintain propylene in liquid form. The resulting propylene homopolymer, while still containing active catalyst residues, is then reacted further with at least one additional alpha-olefin, preferably ethylene or ethylene-containing alpha-olefin mixtures in suitable amounts. The resulting waxy block copolymer has a melt flow of 40 to 400 as determined by ASTM-D-1238-62T at 230.degree.C.
    Type: Grant
    Filed: September 23, 1974
    Date of Patent: June 1, 1976
    Assignee: Dart Industries Inc.
    Inventors: Joseph M. Kelley, John J. Miskel, Jr.
  • Patent number: 3958530
    Abstract: The present invention relates to a method and apparatus for treating vitreous surfaces such as glass with a coating material introduced upwardly into a coating area or chamber from below a conveyor means which transports the article through such coating area. Distributor means with spaced outlet perforations or openings communicating with the coating area is placed below such coating area and is provided with a source of coating material.This is a division of application Ser. No. 280,376, filed Aug. 14, 1972, now abandoned.
    Type: Grant
    Filed: October 17, 1974
    Date of Patent: May 25, 1976
    Assignee: Dart Industries Inc.
    Inventor: Michael A. Novice
  • Patent number: 3959244
    Abstract: Hydroxy-terminated polymers of butadiene having two hydroxy groups per molecule are prepared by polymerizing butadiene in a chain transfer solvent at a temperature of from about 50.degree. to about 170.degree.C. with t-butyl beta-hydroxyethyl peroxide as an initiator.
    Type: Grant
    Filed: August 27, 1973
    Date of Patent: May 25, 1976
    Assignee: Dart Industries Inc.
    Inventor: Norman G. Gaylord
  • Patent number: 3957097
    Abstract: A container and closure combination wherein the closure includes a stepped ledge area formed by two truncated conical sections that produce a structure resiliency enabling the generation of an effective seal between the mating parts.
    Type: Grant
    Filed: February 26, 1975
    Date of Patent: May 18, 1976
    Assignee: Dart Industries Inc.
    Inventor: James B. Swett
  • Patent number: 3957909
    Abstract: ABS compositions of improved impact strength are obtained by adding thereto controlled amounts of a synthetic hydrocarbon resin having a ring and ball softening point of at least 70.degree.C and derived from deeply cracked petroleum stocks.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: May 18, 1976
    Assignee: Dart Industries Inc.
    Inventors: Peter James Perron, Joseph Leopold Schafer
  • Patent number: 3956613
    Abstract: A generally bowl-shaped coffee maker base structure is disclosed having a plurality of receptacles extending upwardly from the structure bottom. Exposed electrical terminals common with electrical parts on an electric coffee maker are positioned within the appropriate receptacles. The electrical terminals are encapsulated by filling the receptacles with a liquid hardenable sealing compound. The compound is cured and hardens to provide watertight corrosion-proof terminals to produce an immersible unitary base structure for a coffee maker.
    Type: Grant
    Filed: March 5, 1975
    Date of Patent: May 11, 1976
    Assignee: Dart Industries Inc.
    Inventors: William C. Dobson, James M. Straughn
  • Patent number: 3955824
    Abstract: Glassware coating apparatus including spraying equipment and a transfer mechanism that assures the uniform application of a thermoplastic polymer on glassware (i.e., bottleware) in a continuous fashion without occurrence of internal contamination. The apparatus, among other things, includes a unique chucking arrangement adapted to seize the ware in the finish area and transfer same through the spraying equipment. Likewise, the apparatus includes provision for fluid purging each bottle during the spraying thereof.
    Type: Grant
    Filed: March 5, 1975
    Date of Patent: May 11, 1976
    Assignee: Dart Industries Inc.
    Inventors: Roy S. Arrandale, James H. Cady, Leroy C. Hartman
  • Patent number: 3953304
    Abstract: An aqueous acid nickel electroplating bath containing as a brightener-leveling agent the reaction product of an acetylenic diester of a halogenated saturated aliphatic acid with a heterocyclic compound containing a tertiary nitrogen atom. The brightener may have the general formula ##EQU1## wherein R.sub.1 and R.sub.2 are hydrogen, halogen or a hydroxy, carboxy, carboxyester, sulphoxy, alkyl, amino or amido group;R.sub.3 is a hydrogen or an alkyl group;R.sub.4 and R.sub.5 are hydrogen or an alkyl group;X is halogen andN is an integer from 0 to 2.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: April 27, 1976
    Assignee: Dart Industries Inc.
    Inventors: John L. Allan, Kollengode V. Srinivasan, Philip D. Readio, Judit Cestero
  • Patent number: 3952118
    Abstract: The present invention relates to a method and apparatus for treating vitreous surfaces such as glass with a coating material introduced upwardly into a coating area or chamber from below a conveyor means which transports the article through such coating area. Distributor means with spaced outlet perforations or openings communicating with the coating area is placed below such coating area and is provided with a source of coating material.
    Type: Grant
    Filed: October 17, 1974
    Date of Patent: April 20, 1976
    Assignee: Dart Industries Inc.
    Inventor: Michael A. Novice
  • Patent number: 3951911
    Abstract: Propylene-based, normally solid polymer compositions are stabilized against oxidative degradation especially when exposed to both a metal such as copper and a soft hydrocarbon medium such as petrolatum. Highly synergistic levels of stability are achieved by combining in said polymer compositions three different stabilizer additives (a), (b) and (c) as follows:A. between about 0.4 and about 1.6% by weight of the tetraester of pentaerythritol with 3(3',5'-ditertiary butyl, 4'-hydroxy phenyl) propionic acid,B. between about 0.1 and about 0.4% by weight of N,N'" diacetyl N',N" adipoyl dihydrazide, andC. between about 0.15 and about 0.
    Type: Grant
    Filed: November 22, 1974
    Date of Patent: April 20, 1976
    Assignee: Dart Industries Inc.
    Inventor: Kornel D. Kiss
  • Patent number: 3940379
    Abstract: A process is provided for the degradation of propylene polymers comprising contacting a propylene polymer exhibiting a first melt flow rate with oxygen or an oxygen-containing gas and an organic or inorganic peroxide; melting and working and resulting mixture in a high shear zone thereby degrading said propylene polymer; and recovering an essentially odor free propylene polymer exhibiting a second melt flow rate higher than said first melt flow rate.
    Type: Grant
    Filed: May 21, 1973
    Date of Patent: February 24, 1976
    Assignee: Dart Industries, Inc.
    Inventors: Eugene G. Castagna, Albert Schrage, Michael Repiscak
  • Patent number: 3940181
    Abstract: An adjustable lightweight hassock comprising a cushion-like upper seat portion pivotally mounted on a unitary tubular base for angular displacement. The upper seat portion is provided with a movable brace element having a multiplicity of teeth for releasably retaining the seat in a tilted position and including an elongated slot so that when the seat is lowered to a horizontal position, the brace element will become horizontally disposed in an inconspicuous position beneath the seat.
    Type: Grant
    Filed: October 24, 1974
    Date of Patent: February 24, 1976
    Assignee: Dart Industries, Inc.
    Inventor: Thomas M. Cheek, Jr.
  • Patent number: 3937758
    Abstract: Novel polypropylene compositions comprising blends of 85-97wt percent block copolymers of propylene and ethylene with 3-15wt percent linear polyethylene and a process therefor. The compositions exhibit improved impact and low temperature brittleness properties.
    Type: Grant
    Filed: July 1, 1975
    Date of Patent: February 10, 1976
    Assignee: Dart Industries Inc.
    Inventor: Eugene G. Castagna
  • Patent number: 3935805
    Abstract: A spreader closure of the type used to cover a ground coffee receptacle in a coffee brewing apparatus adapted to receive and distribute hot water, said spreader closure having an upper surface portion divided into channels to direct hot water from a central portion to orifices leading through the spreader closure wall whereby the hot water will be evenly distributed over the ground coffee. A special frusto-conical orifice is provided which eliminates blockage due to surface tension.
    Type: Grant
    Filed: October 3, 1973
    Date of Patent: February 3, 1976
    Assignee: Dart Industries Inc.
    Inventor: Russell E. Ihlenfeld
  • Patent number: 3936126
    Abstract: An electrical connector adapted to provide a common junction and electrical coupling device for a plurality of conductors, preferably at least four conductors; said electrical connector comprising a box like body of deflectable plastic material, said body having a cover integrally connected therewith by a "living hinge"; and a resilient metallic electrical contact member having a plurality of contact portions all integral with each other; the contact portions having conductor engaging and wedging edges at opposite ends thereof; said edges operable adjacent wall portions of said body which is provided with conductor receiving openings adjacent to said wedging edges whereby electrical conductors may be inserted through said openings and between said wedging edges of said contact portions and respective wall portions of said body; said contact member in its prefered form being substantially H-shaped and having a conductor cross bar portion interconnecting a pair of contact portions, each of which has a pair of o
    Type: Grant
    Filed: December 7, 1973
    Date of Patent: February 3, 1976
    Assignee: Dart Industries Inc.
    Inventor: Gregory H. Miller
  • Patent number: 3935128
    Abstract: An improved copper chromite catalyst having high density, low monovalent ion content, high activity and resistance to poisoning is prepared by reacting a soluble copper salt with chromic acid or a dichromate in solution in the presence of ammonia and urea to precipitate a copper-chromium-nitrogen complex, washing, drying and calcining the precipitate.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: January 27, 1976
    Assignee: Dart Industries Inc.
    Inventors: Marvin Michael Fein, Paul Alexander Colgate, Ronald Allan Kent