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. 21, 2002
Filed:
Aug. 24, 1999
Seiko Epson corportation, Tokyo, JP;
Abstract
An image display apparatus including a metal outer housing for which a filling process in a thixotropic forming method has been improved. On a reference surface of an upper housing composing the outer housing of a projection display apparatus, there are formed convex sections, and a supporting rib, the foregoing convex sections extending in the direction where a semimolten metal flows, and the foregoing supporting rib intersecting with the foregoing convex sections. Furthermore, protrusions are formed protruding from the reference surface, and flowing ribs are independently formed on base sections of the protrusions. These convex sections, supporting rib, and flowing ribs are formed in the upper housing for guiding the semimolten metal in the thixotropic forming method, and thereby ensuring filling characteristics of the semimolten metal into individual molds.