Patents Assigned to Christiana Metals Corporation
  • Ultrasonic spot welder
    Patent number: 4088257
    Abstract: An ultrasonic spot welder is disclosed with a reed of resonant length arranged to be vibrated in a flexural mode for spot welding both plastics and metals. The reed has a non-circular cross section with major and minor transverse dimensions. Vibratory energy is transmitted to the reed in a direction perpendicular to its major transverse dimension.
    Type: Grant
    Filed: February 14, 1977
    Date of Patent: May 9, 1978
    Assignee: Christiana Metals Corporation
    Inventor: Janet Devine
  • Method of making container with easy open top
    Patent number: 4071182
    Abstract: A container adapted to contain a beverage or other goods is provided with an easy open top by a disk juxtaposed to a hole in the container lid and welded to the container lid by a ring weld circumscribing the hole. Access to the contents of the container is attained by pushing the disk into the container whereby the disk tears along the weld and does not separate from the lid.
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: January 31, 1978
    Assignee: Christiana Metals Corporation
    Inventors: Thomas A. Walraven, John G. Thomas, James B. Hall
  • Container with easy open top
    Patent number: 4036397
    Abstract: A container adapted to contain a beverage or other goods is provided with an easy open top by a disk juxtaposed to a hole in the container lid and welded to the container lid by a ring weld circumscribing the hole. Access to the contents of the container is attained by pushing the disk into the container whereby the disk tears along the weld and does not separate from the lid.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: July 19, 1977
    Assignee: Christiana Metals Corporation
    Inventors: Thomas A. Walraven, John G. Thomas, James B. Hall