Method and apparatus for pressing glass articles
AssigneeCorning Glass Works
InventorsElmer L. Anderson, Kenneth L. Goodrich, Robert C. Hillman
Life of this patent
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Abstract
Method and apparatus are set forth for forming articles from molten sheet glass wherein the molten sheet glass initially substantially conforms to a mold cavity by a combination of vacuum and/or gravity, and then while still in a semi-molten condition the sheet is pressed into a finished ware article.
Claims12
A method of pressing glass articles from molten glass which comprises, delivering a sheet of molten glass to a surface of a mold assembly having a mold cavity formed therewithin so as to overlie the mold cavity and the surrounding surface of the mold assembly, initially permitting said sheet of molten glass to substantially conform to the contour of said mold cavity, then pressing said contoured sheet within said mold cavity while still in a semi-molten condition into an article of desired upper and lower surface configuration, trimming the glass within said mold cavity from the remainder of the sheet deposited upon surrounding surface portions of the mold assembly, and removing said completed article from said mold cavity.
Apparatus for pressing glass articles from a sheet of molten glass delivered thereto which comprises, a mold assembly having surface portions for receiving said sheet of molten glass, at least one mold cavity formed within the surface of said mold assembly and communicating therewith, means communicating with a bottom surface of said mold cavity for venting and applying a vacuum thereto, trimming recess means formed in the surface of said mold assembly about the outer periphery of said mold cavity for suspending said sheet of molten glass in spaced-apart relationship to said mold assembly peripherally of said mold cavity, plunger means for pressing the glass sheet within said mold cavity from centrally thereof radially-outwardly toward edge portions thereof to prevent air entrapment on upper surface portions of the sheet, and trimming means axially aligned with said trimming recess means for trimming the pressed article within said mold cavity from the remainder of the sheet overlying surrounding surface portions of said mold assembly.
Dependencies are inferred from the claim text.