Patents Assigned to Dart Industries Inc.
  • Patent number: 4037011
    Abstract: Novel injection molding fiberglass reinforced thermoplastic concentrate granules are prepared by a process wherein continuous multifilament glass strands are impregnated with from 10 to 30 percent by weight of thermoplastic resin and, while the strand is maintained under controlled temperature conditions, the impregnated strand is cut to lengths of at least 1/8 of an inch.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: July 19, 1977
    Assignee: Dart Industries Inc.
    Inventors: Kiyoshi Hattori, Edward L. Lowery, William H. Chadbourne, William M. Boyer
  • Patent number: 4029618
    Abstract: A vinyl halide resin stabilizer composition which essentially contains:A. an antimony organic sulfur-containing compound, for example, antimony alkyl mercaptides, antimony mercaptoacid esters and the like, andB. an ortho-dihydric phenol, such as catechol, t-butyl catechol and 2,3-dihydroxy naphthalene.These compositions synergistically contribute to the heat stability of vinyl halide resin compositions and offer significant heat stabilization economies. Early color as well as long term heat stability performances of antimony organic compounds are improved in the compositions disclosed thereby permitting the reduction in amounts of such compounds needed for stabilization. Stabilizer compositions which are liquids and shelf-stable at ambient temperatures are also disclosed.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: June 14, 1977
    Assignee: Dart Industries Inc.
    Inventor: Dale J. Dieckmann
  • Patent number: 4027426
    Abstract: Containers are provided with a label and subsequently coated to seal and protect the label while enhancing the appearance and durability of the container. The coating also gives the label an appearance of depth and greatly enhances its appeal and attractiveness.
    Type: Grant
    Filed: January 15, 1975
    Date of Patent: June 7, 1977
    Assignee: Dart Industries Inc.
    Inventors: Wayne A. Wallding, Roy S. Arrandale
  • Patent number: 4028238
    Abstract: A highly concentrated municipal waste sludge is recovered in a process which involves adding alum and a flocculating agent under alkaline conditions to a dilute waste sludge, adding calcium oxide or hydroxide and filtering the resultant mixture under pressure.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: June 7, 1977
    Assignee: Dart Industries Inc.
    Inventor: John L. Allan
  • Patent number: 4027085
    Abstract: In apparatus for polymerizing high-pressure ethylene to produce polyethylene, a tubular reactor is connected to a source of solution to the tubular reactor. This solution includes one or more catalysts which promote the polymerization reaction. Within the tubular reactor, a peak temperature occurs in proximity of the point at which the catalysts are introduced. If the catalysts are introduced at more than one point, peak temperatures will result downstream of each of such points. For various reasons, the peak temperatures are displaced along the tubular reactor and a plurality of thermocouples are distributed at spaced positions in the tubular reactor to measure the temperatures at the positions at which the peak temperature might occur. These thermocouples generate signals which are fed into a gating arrangement which selects the peak signal which is compared in a comparator circuit with an adjustable or selectable signal representative of the peak temperature which is desired.
    Type: Grant
    Filed: May 19, 1975
    Date of Patent: May 31, 1977
    Assignee: Dart Industries Inc.
    Inventors: Clyde C. Clemmer, Ward C. Alcorn, III
  • Patent number: 4022464
    Abstract: A package is provided having a rotatable closure equipped with dispensing orifices. The orifices overlie a neck portion having indentations spaced about its inner edge and which when aligned with the dispensing orifices provide access to the contents of the package. The closure includes an inner annular skirt which has axial slots about its outer periphery. The slots direct the flow of the container contents through the neck indentations and out the orifices when the closure is rotated to an open position. When the closure is in a closed position, the orifices will be located above flat areas on the top edge of the container neck.The closure includes a downwardly depending inner wall having engagement means for rotatably connecting the closure to the container neck.
    Type: Grant
    Filed: October 3, 1975
    Date of Patent: May 10, 1977
    Assignee: Dart Industries Inc.
    Inventor: Keith Parker
  • Patent number: 4022638
    Abstract: A procedure and apparatus are shown for on a continuous, commercially practical basis recovering a non-ferrous base metal, such as copper or aluminum in the form of clean, bright metal pieces or bits and for enabling recovery of different non-ferrous coating metals, such as of lead, tin or alloys thereof, and under conditions in which a resin insulating coating may be present. Mechanical shredding means is used for reducing insulated wire to an aggregate containing bits, particles or pieces within a requisite size range, extraneous magnetics are removed, and the content of resin coating material is reduced under dry conditions to within a maximum of 2%.
    Type: Grant
    Filed: August 5, 1975
    Date of Patent: May 10, 1977
    Assignee: Dart Industries Inc.
    Inventor: James H. Weet
  • Patent number: 4022155
    Abstract: Glassware coating apparatus including an oven and fluidized bed arrangement that preheats, dip coats and cures a thermoplastic shatterproof polymer on ware in a continuous fashion. The apparatus, among other things, includes a gripper device adapted to seize a plurality of ware simultaneously and transfer same through the coating stage. Similarly, there are disclosed techniques and apparatus for pre-heating, curing, applying variable coating thicknesses and transferring and lubricating coated ware.
    Type: Grant
    Filed: October 16, 1974
    Date of Patent: May 10, 1977
    Assignee: Dart Industries Inc.
    Inventors: Edward R. Campagna, Donald F. Hardy, Thomas W. Palmer, III, Barney R. Daugherty, John R. Letawa
  • Patent number: D243911
    Type: Grant
    Filed: August 14, 1975
    Date of Patent: April 5, 1977
    Assignee: Dart Industries Inc.
    Inventor: Stanley R. Thorud
  • Cup
    Patent number: D244063
    Type: Grant
    Filed: December 27, 1974
    Date of Patent: April 19, 1977
    Assignee: Dart Industries Inc.
    Inventor: Hubert E. Christian
  • Patent number: D244065
    Type: Grant
    Filed: September 10, 1975
    Date of Patent: April 19, 1977
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Patent number: D244071
    Type: Grant
    Filed: January 7, 1976
    Date of Patent: April 19, 1977
    Assignee: Dart Industries Inc.
    Inventor: Rodney R. Haynes, Sr.
  • Patent number: D244164
    Type: Grant
    Filed: October 9, 1975
    Date of Patent: May 3, 1977
    Assignee: Dart Industries Inc.
    Inventor: Rodney R. Haynes, Sr.
  • Patent number: D244246
    Type: Grant
    Filed: September 10, 1975
    Date of Patent: May 10, 1977
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Patent number: D244340
    Type: Grant
    Filed: August 28, 1975
    Date of Patent: May 17, 1977
    Assignee: Dart Industries Inc.
    Inventor: Harold P. Ashton
  • Patent number: D244415
    Type: Grant
    Filed: September 10, 1975
    Date of Patent: May 24, 1977
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Patent number: D244723
    Type: Grant
    Filed: July 31, 1975
    Date of Patent: June 14, 1977
    Assignee: Dart Industries Inc.
    Inventor: Harold Rabinowitz
  • Patent number: D244741
    Type: Grant
    Filed: September 10, 1975
    Date of Patent: June 21, 1977
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Patent number: D244742
    Type: Grant
    Filed: January 23, 1976
    Date of Patent: June 21, 1977
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Patent number: D245387
    Type: Grant
    Filed: April 21, 1976
    Date of Patent: August 16, 1977
    Assignee: Dart Industries Inc.
    Inventor: Roger P. Beauchamp