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:
Dec. 04, 2007
Filed:
Jun. 06, 2003
Shinsuke Kishi, Saitama, JP;
Osamu Matsuura, Shizuoka, JP;
Shinsuke Kishi, Saitama, JP;
Osamu Matsuura, Shizuoka, JP;
Sony Disc & Digital Solutions Inc., Tokyo, JP;
Abstract
A spaceis formed at a tip portion of a nozzleso as to decrease a thermal transfer of the nozzle. Alternatively, a center portion of one of a semi-spherically protruded surface of the tip portion of the nozzleand a semi-spherically recessed surface of a sprue bush protrudes so that the radius of curvature of one semi-spherical surface is the same as the radius of curvature of the other semi-spherical surface. As a result, since the nozzleand the sprue bushare surface-contacted, heat of the tip portion of the nozzleabsorbed to the sprue bushis increased. Thus, the temperature of the tip portion of the nozzlecan be lowered easily. After the resin material injected into the molding cavityis cooled, when the sprue portion is removed from the fixed die, a tip portion of a rod-shaped protrusion portion of the sprue can be properly cut.