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. 02, 2006
Filed:
Jan. 13, 2004
Makoto Horiuchi, Nara, JP;
Tsuyoshi Ichibakase, Osaka, JP;
Kiyoshi Takahashi, Kyoto, JP;
Shinichiro Hataoka, Osaka, JP;
Tomoyuki Seki, Osaka, JP;
Takashi Tsutatani, Shiga, JP;
Makoto Horiuchi, Nara, JP;
Tsuyoshi Ichibakase, Osaka, JP;
Kiyoshi Takahashi, Kyoto, JP;
Shinichiro Hataoka, Osaka, JP;
Tomoyuki Seki, Osaka, JP;
Takashi Tsutatani, Shiga, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The formation step of a sealing portionincludes the substeps of inserting, into the side tube portion, a glass membermade of a second glass having a softening point lower than that of a first glass constituting the side tube portion; tightly attaching forward and backward portions (A and C) of the glass memberto the side tube portionby heating the side tube portionwhen the glass memberis divided into the forward portion, the backward portion, and a central portion under the assumption that the side of the glass membercloser to a luminous bulb portionis the forward side, thereby forming a cavitybetween at least a portion of the central portion (B) and the side tube portion; and heating, after the attachment step, a portion including at least the glass memberand the side tube portionat a temperature higher than the strain point temperature of the second glass.