Apparatus and methods for sequential pressing to form glass-based articles
AssigneeCorning Incorporated
InventorsSteven Roy Burdette, Patrick Michael Thornton
Life of this patent
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Abstract
A method of forming a glass-based article comprises depositing molten glass onto a first molding member and pressing the molten glass between the first and second molding members by moving the first molding member and the second molding member towards one another. The pressing of the molten glass comprises moving a portion of one of the first and second molding members relative to a remaining portion thereof to form a first reduced-area pressing zone and, after formation of the first reduced-area pressing zone, moving the portion relative to the remaining portion to form a second reduced-area pressing zone where the molten glass is compressed between the first and second molding members.
Claims12
A method of forming a glass-based article, the method comprising:
- depositing molten glass onto a first pressing surface of a first molding member;
- aligning the first molding member with a second molding member, the second molding member comprising a second pressing surface facing the first pressing surface;
- and
- pressing the molten glass between the first pressing surface and the second pressing surface, the pressing comprising:
- moving a first portion of the first molding member relative to a second portion thereof until an offset is formed between the first portion and the second portion and the first portion is separated from the second molding member by a first predetermined minimum separation distance to form a first reduced-area pressing zone where the molten glass is compressed between the first and second pressing surfaces;
- after forming the first reduced-area pressing zone, moving the first portion relative to the second portion to reduce the offset and moving the second molding member until the second portion is separated from the second molding member by a second predetermined minimum separation distance to form a second reduced-area pressing zone where the molten glass is compressed between the first and second pressing surfaces;
- and
- wherein the moving the second molding member comprises varying a velocity of the second molding member based at least in part on a relative velocity between the first and second portions while reducing the offset.
Dependencies are inferred from the claim text.