The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 2001
Filed:
Aug. 28, 1996
Donivan M. Shetterly, Toledo, OH (US);
Christopher A. Hersch, Perrysburg, OH (US);
Glasstech, Inc., Perrysburg, OH (US);
Abstract
Apparatus (,) for forming a heated glass sheet G is disclosed as including a vacuum mold (,) having a full surface (,) against which a peripheral mold (,) presses the glass sheet periphery and with which at least one vacuum reservoir (,) is communicated within the interior of the sealed glass sheet periphery to form the glass sheet to the shape of the vacuum mold surface. Valving (,) of a vacuum system (,) is preferably operable to provide the vacuum impulse in two stages with an initial limited extent of vacuum and a subsequent greater extent of vacuum by communication first with one vacuum reservoir (,) and subsequently with another vacuum reservoir (,). Different embodiments of the vacuum mold have the vacuum mold surface facing upwardly and downwardly with convex and concave shapes. Glass sheet shapes including straight line elements such as cylindrical and conical bends as well as shapes including curvatures in transverse directions and inverse curvatures can be effectively provided by this vacuum impulse forming.