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US 4,396,410 AGranted
Method of and apparatus for press bending glass sheets
AssigneeLibbey-Owens-Ford Co.
InventorsFloyd T. Hagedorn, Robert G. Revells
Life of this patent
Estimating the term…
Abstract
A method of and apparatus for press bending glass sheets into nonsymmetrical shapes including opposed press rings having complementary nonsymmetrical shaping surfaces, one of said press rings having a displaceable segment forming a part of the shaping rail to clamp the sheet against the opposed shaping rail and avoid drifting of the sheet relative to said shaping rails.
Claims12
A method of bending a glass sheet comprising:
- heating a glass sheet to the softening point thereof, supporting said heated sheet between and in spaced relation to a pair of opposed press members having shaping rails provided with shaping surfaces, providing one of said shaping rails with a major portion and a displaceable portion normally disposed out of the general plane of said major portion toward the other shaping rail, moving said other shaping rail toward said one shaping rail to remove said sheet from said support and carry said sheet into engagement with said displaceable portion, clamping said sheet between said displaceable portion and said other shaping rail to prevent glass movement therebetween before engagement of said sheet with said major portion to impart a final desired shape to said sheet.
Apparatus for bending a glass sheet comprising:
- a frame, means on said frame for supporting a glass sheet, a pair of opposed movable bending members mounted on said frame on opposite sides of said sheet, each of said bending members having an outline shaping rail provided with a shaping surface conforming to the marginal outline of the glass sheet to be bent, one of said shaping rails having a fixed major portion and a displaceable portion normally disposed out of the general plane of said major portion toward the other shaping rail, means for moving said other shaping rail toward said one shaping rail for removing said sheet from said support and carrying said sheet into engagement with said displaceable portion to clamp said sheet therebetween prior to engagement of said sheet against said major portion of said one shaping rail.
Dependencies are inferred from the claim text.