Patents Assigned to Plastic Research Products, Inc.
  • Patent number: 4298036
    Abstract: An improved dispenser for cosmetic stick solids such as deodorants constructed to be filled in either normal or inverted position. This dispenser is cylindrical having walls of substantially uniform diameter, an open top, and substantially closed bottom. The dispenser is constructed so that the dispensing means is either pushed up manually, or propelled by a screw-mechanism. In the latter case a long screw is mounted in a central opening in the bottom, and continues along the axis of the cylinder. The cap of the dispenser may assume either of two forms, a snap-on type, or a screw-on type, each exhibiting an air-tight seal. The snap-cap is constructed to include a plurality of cams which operate in conjunction with similar members on the mouth of the cylindrical container to provide relative ease in opening and closing the snap-cap.The dispenser is designed to be filled in a conventional manner from the opening in the top, or, alternatively, from a hole in the bottom of the cylindrical container.
    Type: Grant
    Filed: December 13, 1979
    Date of Patent: November 3, 1981
    Assignee: Plastic Research Products, Inc.
    Inventor: William Horvath
  • Patent number: 4057176
    Abstract: A reciprocating type of finger pump for use on top of a product container. This combines a tubular housing, including a laterally directed spray nozzle, mounted coaxially in the sleeve of an accumulator cap including a central valve. The valve opening leads to a dip tube which passes into a liquid reservoir in the container. The tubular housing, including the spray nozzle, is depressed manually so that it moves telescopically in the accumulator sleeve, driving a hollow piston against the tension of a spring. The first compression stroke serves to prime the pump, forcing a piston to close the valve to the dip tube. Simultaneously, air in an annular chamber of the housing surrounding the hollow piston is compressed. On the reverse or suction stroke, the valve to the dip tube is opened, creating a vacuum which causes the liquid to be sucked up from the reservoir and into the hollow piston.
    Type: Grant
    Filed: May 5, 1976
    Date of Patent: November 8, 1977
    Assignee: Plastic Research Products, Inc.
    Inventor: William Horvath
  • Patent number: 3987891
    Abstract: A moisture proof safety container for pills and the like in which a drawer moves slidably in a rectangular cover, snap-locking closed by means of a latching mechanism comprising a hooked tongue which engages a small window in the upper left-hand corner of the cover. The drawer, including the hooked tongue, is guided into latching position with the cover by means of a fulcrum point located on the inside of the cover which bears against one side of the drawer. When the drawer is closed a small projection at the center of the cover seats on the bottom of the drawer, cooperating with a small bead around the rim of the drawer, and small feet in the corners, to produce a moisture proof seal.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: October 26, 1976
    Assignee: Plastic Research Products, Inc.
    Inventor: William Horvath