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:
Mar. 29, 2011
Filed:
May. 26, 2004
Hiroshi Inoue, Higashiosaka, JP;
Norimasa Kurihara, Shijonawate, JP;
Shoko Matsumoto, Tokyo, JP;
Kyoko Sano, Nara, JP;
Takeshi Omatsu, Kyotanabe, JP;
Shigeki Yoneda, Neyagawa, JP;
Yasunori Nakatani, Nishinomiya, JP;
Hiroyoshi Yamamoto, Kobe, JP;
Kozaburo Fujita, Yao, JP;
Hiroshi Inoue, Higashiosaka, JP;
Norimasa Kurihara, Shijonawate, JP;
Shoko Matsumoto, Tokyo, JP;
Kyoko Sano, Nara, JP;
Takeshi Omatsu, Kyotanabe, JP;
Shigeki Yoneda, Neyagawa, JP;
Yasunori Nakatani, Nishinomiya, JP;
Hiroyoshi Yamamoto, Kobe, JP;
Kozaburo Fujita, Yao, JP;
Abstract
A tip unit () incorporated in a liquid applicator such as a ball-point pen, the tip unit being capable of an increased rate of liquid discharge with no leaking or clogging problem. To achieve it, the tip unit () is accommodated in a tip body () having a ball housing (), a ball (), a capillary hole (), and a proximal bore, the ball housing () being a passage for allowing liquid to flow therethrough, the ball () being rotatively held in the ball housing (). The ball housing () is provided with at least one ink channel () adapted to communicate the ball housing () with the capillary hole () or the proximal bore. The ball housing () has a ball resting seat () and a side wall () that are connected by a connecting surface () having a shape of a truncated conical surface with its apex toward the distal end of the tip unit ().