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:
Jun. 06, 1989
Filed:
Sep. 26, 1988
Shinichiro Hirota, Hachioji, JP;
Kishio Sugawara, Hamura, JP;
Hoya Corporation, Tokyo, JP;
Abstract
In a press-molding device for lenses, an upper surface of a drag is formed into a molding surface, and a lower surface of a cope is formed into a molding surface. An inner peripheral surface of a guide mold portion is in contact with an outer peripheral surface of the drag, and has an axial length longer than that of the outer peripheral surface of the drag so that the inner peripheral surface extends upwardly from the molding surface of the drag. The cope is capable of sliding along the inner peripheral surface. A pressure plate is in contact with an upper surface of the cope before pressing, and is abutted against the upper surface of the guide mold portion by the pressing. A glass preform to be molded is arranged between the molding surfaces of the respective cope and drag. The cope is pressed from above through the pressure plate, thereby molding the glass preform to a lens. The guide mold portion may be divided into a pair of upper and lower portions.