Plural Direction Alignnment Of Sets Patents (Class 492/31)
Outer screenlike layer over skeleton or perforate core; e.g., dandy roll (Class 492/32)
  • Method for engraving solid articles with laser beams and the articles produced
    Patent number: 5236763
    Abstract: A method for engraving a series of consecutive cells in a solid surface, such as a liquid transfer surface, by impinging on the surface a pulsed laser beam in which the pulses of the laser beam are formed in a series of consecutive groups of two or more consecutive pulses and each of said groups form an individual cell in the solid surface. The article produced is also described.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: August 17, 1993
    Assignee: Praxair S. T. Technology, Inc.
    Inventor: Pierre Luthi