Patents Assigned to M-I Swaco
  • Plugs for repairing sifting or filtering screens
    Patent number: 8961784
    Abstract: There is provided a plug (1) for repairing a sifting or filtering screen, the plug having at least one line of weakening (5) which can be ruptured whereby the plug has a plurality of possible plug sizes so that the plug is capable of plugging at least two different sizes of cell of the screen. Each possible plug size has a seal (2) extending around the complete periphery of the chosen plug size, in use the seal serving to engage and seal against the screen in order to plug a cell aligned with a damaged area of the screen.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: February 24, 2015
    Assignee: M-I Swaco
    Inventor: Andrew Ralph