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US 4,318,728 AGranted
Double link arrangement for press bending molds and method of press shaping glass sheets
AssigneePPG Industries, Inc.
InventorGeorge R. Claassen
Life of this patent
Estimating the term…
Abstract
Shaping a glass sheet between pressing molds of complementary curvature while the glass sheet moves continuously from a furnace exit to a cooling area by moving the molds synchronously with the glass sheet and simultaneously toward and away from one another in such a manner that their relative orientation to one another is not changed during glass sheet engagement.
Claims24
A method of press bending a continuously moving sheet, comprising the steps of:
- continuously moving the sheet from a first location along a sheet movement path toward a second location between a pair of spaced pressing molds having complementary shaped surfaces aligned with one another in a predetermined orientation;
- moving the spaced pressing molds toward one another to engage opposite major surfaces of the moving sheet between the aligned surfaces;
- simultaneously moving the molds and sheet along a portion of the sheet movement path to maintain engagement between the aligned surfaces and the opposite major surfaces of the moving sheet to shape the sheet;
- while
- maintaining the predetermined orientation of the aligned surfaces during the simultaneous moving step.
2 more elements
Apparatus for press bending a moving sheet comprising:
- conveyor means for continuously moving the sheet from a first location along a sheet movement path toward a second location;
- a pair of spaced pressing molds having complementary shaped surfaces aligned with one another in a predetermined orientation;
- means for simultaneously moving the pressing molds toward one another to engage opposite major surfaces of the moving sheet between the aligned surfaces of the molds without stopping the sheet;
- means for moving the molds and sheet along a portion of the sheet movement path to maintain engagement therebetween;
- and
- means for maintaining the predetermined orientation of the aligned surfaces while maintaining engagement between the aligned surfaces and the opposite major surfaces of the moving sheet.
3 more elements
Dependencies are inferred from the claim text.