Patents Assigned to Dart Industries
  • Batch material blender and method therefor
    Patent number: 4307759
    Abstract: A measuring and transferring device for automatically metering predetermined and variable quantities of virgin plastic material, reprocessed plastic material and color concentrate to an extrusion machine. This masterbatch material blender incorporates a rotary conveyor having openings therein that receive and retain predetermined amounts of virgin plastic material and color concentrate in one position of movement of the conveyor and discharge same to the extruder in yet another position of movement thereof. Furthermore, such conveyor is adapted to control yet another reciprocable metering and transfer mechanism that similarly controls the addition of reprocessed material to the batch by way of the same measuring and transferring device.
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: December 29, 1981
    Assignee: Dart Industries Inc.
    Inventor: Vincent S. La Bianca
  • Continuous process for preparing dry metallic salts of higher fatty acids
    Patent number: 4307027
    Abstract: Metallic salts of higher molecular weight fatty acids are produced in a continuous process by feeding fatty acid and base into a plug flow reactor to maintain a residence time of about 2 to about 60 minutes at a temperature of about 75.degree. F. to about 280.degree. F. to obtain a metallic salt, then grinding the metallic salt in a hammer mill to obtain coarse particles and then grinding the coarse particles in a jet mill to obtain fine particles of the metallic salt. Optionally, the fatty acid and base may be fed initially into a stirred-tank reactor to maintain a residence time of about 10 to about 80 minutes at a temperature of from about 115.degree. F. to about 300.degree. F. to initiate metallic salt reaction before feeding the metallic salt reaction mixture into the plug flow reactor.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: December 22, 1981
    Assignee: Dart Industries Inc.
    Inventors: Richard D. Borzelli, Joseph Cunder
  • Mug type drinking receptacle with cover and valve
    Patent number: 4303173
    Abstract: An open top receptacle with a laterally extending handle on one side is arranged to receive a cup-shaped cover. This cover includes a valve assembly to close off an opening in the top of the cover to prevent spilling or splashing of either hot or cold beverages from the receptacle. The valve assembly in turn includes a valve head biased against the opening in the cover by resilient integral supporting arms secured to the underside of the cover. An actuating member passes into one side of the cover at a point spaced 90.degree. from the opening, this point being generally vertically above the lateral handle on the receptacle. With this arrangement, a person can hold the handle of the receptacle in the manner of a mug using the thumb to depress the actuating member inwardly which action moves the valve head away from the opening in the cover to permit drinking of the beverage in the receptacle.
    Type: Grant
    Filed: July 2, 1979
    Date of Patent: December 1, 1981
    Assignee: Dart Industries Inc.
    Inventor: Orv B. Nergard
  • Metal stripping composition and method
    Patent number: 4297257
    Abstract: A composition for stripping solder and tin from a copper substrate having an extended life is provided by the inclusion of a polyacrylamide in a peroxide-fluoride based stripping composition. The presence of the polyacrylamide minimizes the adverse effect of the stripping composition on the copper substrate of the material undergoing treatment.
    Type: Grant
    Filed: April 17, 1980
    Date of Patent: October 27, 1981
    Assignee: Dart Industries Inc.
    Inventors: Moenes L. Elias, Narendra K. Shah
  • Rotatable food serving assembly
    Patent number: D260469
    Type: Grant
    Filed: June 22, 1979
    Date of Patent: September 1, 1981
    Assignee: Dart Industries Inc.
    Inventors: Joseph W. Blake, Anne W. Allen
  • Container closure or the like
    Patent number: D260492
    Type: Grant
    Filed: June 18, 1979
    Date of Patent: September 1, 1981
    Assignee: Dart Industries Inc.
    Inventor: Kenneth E. Scott
  • Hot air corn popper
    Patent number: D260649
    Type: Grant
    Filed: May 11, 1979
    Date of Patent: September 8, 1981
    Assignee: Dart Industries Inc.
    Inventor: M. James Wondergem
  • Scoop or the like
    Patent number: D260722
    Type: Grant
    Filed: April 21, 1980
    Date of Patent: September 15, 1981
    Assignee: Dart Industries Inc.
    Inventor: Robert F. Bateman
  • Key rack or the like
    Patent number: D260829
    Type: Grant
    Filed: April 21, 1980
    Date of Patent: September 22, 1981
    Assignee: Dart Industries Inc.
    Inventor: Joan K. Creamer
  • Pitcher
    Patent number: D260842
    Type: Grant
    Filed: April 13, 1979
    Date of Patent: September 22, 1981
    Assignee: Dart Industries Inc.
    Inventor: Edgar F. Trombly
  • Cover for a food container
    Patent number: D260844
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: September 22, 1981
    Assignee: Dart Industries Inc.
    Inventor: Rino Conti
  • Tote bag
    Patent number: D261076
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: October 6, 1981
    Assignee: Dart Industries Inc.
    Inventor: Maxwell B. Chernoff
  • Tumbler
    Patent number: D261086
    Type: Grant
    Filed: April 13, 1979
    Date of Patent: October 6, 1981
    Assignee: Dart Industries Inc.
    Inventor: Edgar F. Trombly
  • Coffee urn lid
    Patent number: D261215
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: October 13, 1981
    Assignee: Dart Industries Inc.
    Inventors: Leo A. Groh, Douglas D. Ludwig, David L. Painter, John H. Free
  • Ribbed coffee urn lid
    Patent number: D261348
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: October 20, 1981
    Assignee: Dart Industries Inc.
    Inventors: Leo A. Groh, Douglas D. Ludwig, David L. Painter, John H. Free
  • Dish or the like
    Patent number: D261715
    Type: Grant
    Filed: April 23, 1979
    Date of Patent: November 10, 1981
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Container for soil-free plant growth medium
    Patent number: D261874
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: November 17, 1981
    Assignee: Dart Industries Inc.
    Inventor: Abraham I. Tenzer
  • Handle or the like
    Patent number: D261976
    Type: Grant
    Filed: January 16, 1980
    Date of Patent: November 24, 1981
    Assignee: Dart Industries Inc.
    Inventor: Rino Conti
  • Rack or the like
    Patent number: D262337
    Type: Grant
    Filed: September 12, 1979
    Date of Patent: December 22, 1981
    Assignee: Dart Industries, Inc.
    Inventors: Robert F. Bateman, Ann K. Fritz, Rino Conti
  • Onion scoop or the like
    Patent number: D262684
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: January 19, 1982
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen