Patents Assigned to Research Plastics Inc.
  • Caulking tube air escape structure
    Patent number: 5749499
    Abstract: An improved tube for handling fluent materials such as caulking includes a plurality of ribs that form air escape spaces. The ribs extend inwardly from an inner peripheral wall of the tube for a very small distance. The ribs form an air space between a plunger and the tube allowing air to escape rearwardly of the plunger. In another feature of this invention, a color plastic sleeve is received on a nozzle for the tube to provide an identification of the color of the caulking received within the tube.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: May 12, 1998
    Assignee: Research Plastics, Inc.
    Inventor: Frederick Binder
  • Caulking tube air escape structure
    Patent number: 5628433
    Abstract: An improved tube for handling fluent materials such as caulking includes a plurality of ribs that form air escape spaces. The ribs extend inwardly from an inner peripheral wall of the tube for a very small distance. The ribs form an air space between a plunger and the tube allowing air to escape rearwardly of the plunger. In another feature of this invention, a color plastic sleeve is received on a nozzle for the tube to provide an identification of the color of the caulking received within the tube.
    Type: Grant
    Filed: May 2, 1996
    Date of Patent: May 13, 1997
    Assignee: Research Plastics Inc.
    Inventor: Frederick Binder