Patents Examined by Joye Woodward
  • Vacuum platen for sharp bends
    Patent number: 4877437
    Abstract: Apparatus (10) for bending glass sheets (12) disclosed provides press bending between a shaping surface (16), and a press ring (26) of a complementary shape. The apparatus (10) utilizes vacuum drawn through vacuum chambers (22, 30) and thereby on the shaping surface (16), to control the bending and avoid negative curvature associated with press bending sharp bends into glass sheets (12).
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: October 31, 1989
    Assignee: Glasstech International L.P.
    Inventor: David B. Nitschke