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US 8,938,991 B2Granted
Method of making a molded glass article
AssigneeRubbermaid Incorporated
InventorsVignesh Danabalan, William Pierson Hart, Michael A. Zarkis, James Dondero
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Abstract
A method of making a glass container comprising providing a mold defining an article having a base at a bottom of the mold cavity where the mold cavity comprises an undercut portion that defines a recess in the mold cavity; introducing molten glass to the mold; cooling the glass to cause the glass to shrink a sufficient amount that the protuberance recedes from the recess; and removing the container from the mold in a linear direction.
Claims13
A method of making a glass container comprising:
- providing a mold having a single piece mold cavity defining a container having a base and a side wall formed integrally with the base at a bottom of the mold cavity where the mold cavity comprises an undercut portion that defines a recess in the mold cavity;
- introducing molten glass to the mold such that the glass fills the undercut portion to create a protuberance on the base that extends beyond the side wall;
- cooling the glass to cause the glass to shrink a sufficient amount that the protuberance recedes from the recess;
- removing the container from the mold in a linear direction transverse to the recess;
- flame treating the article without flame treating the protuberance whereby the protuberance extends beyond the side wall a distance less than 1 mm.
2 more elements
Dependencies are inferred from the claim text.