Patents Assigned to Alpha Tube Corporation
  • Clean steel tubing
    Patent number: 5411198
    Abstract: An improved steel tube made from low sulfur steel wherein clean steel flat strip is formed into a circular form with its edges abutting and the edges are heated and pushed together to form a welded tube. The inside and outside beads are removed with cutting tools.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: May 2, 1995
    Assignee: Alpha Tube Corporation
    Inventor: Steven G. Jansto