Patents Assigned to D & M Plastics Corporation
  • Molded cellular antenna coil
    Patent number: 5648788
    Abstract: An antenna for a wireless communicating device can be set at a precise frequency, in the as formed state. A coil antenna is precisely held in a mold, while an appropriate plastic is molded therearound, with no distortion of the coil, to fix a precise shape for the coil. The recovered, plastic-encased coil requires little or no follow-up treatment before it can be used in a wireless communication device as an antenna.
    Type: Grant
    Filed: April 23, 1996
    Date of Patent: July 15, 1997
    Assignee: D & M Plastics Corporation
    Inventor: Thomas C. Bumsted
  • Method and apparatus for making a molded cellular antenna coil
    Patent number: 5596797
    Abstract: An antenna for a wireless communicating device can be set at a precise frequency, in the as formed state. A coil antenna is precisely held in a mold, while an appropriate plastic is molded therearound, with no distortion of the coil, to fix a precise shape for the coil. The recovered, plastic-encased coil requires little or no follow-up treatment before it can be used in a wireless communication device as an antenna.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: January 28, 1997
    Assignee: D & M Plastics Corporation
    Inventor: Thomas C. Bumsted
  • Apparatus for filling an injection mold
    Patent number: 5336075
    Abstract: An injection mold capable being filled from the center is a gated mold with at least one repositionable subgate. The subgate permits simplified removal of the central portion of the molded article, while at least substantially eliminating secondary treatment of the molded article.
    Type: Grant
    Filed: July 8, 1993
    Date of Patent: August 9, 1994
    Assignee: D & M Plastics Corporation
    Inventor: Stephen A. Motisi