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:
Aug. 12, 2014
Filed:
May. 07, 2012
Hosoya Tomohiro, Sukagawa, JP;
Hosoya Tomohiro, Sukagawa, JP;
Micro Co., Ltd., , JP;
Abstract
A pressurizing-type pen has a compression cylinder fitted to a rear portion of a refill holder which holds an ink-containing refill. A return spring holder holding an elastic airtight member is inserted inside the refill holder. When the compression cylinder advances, the refill holder also advances and presses the airtight member to bring the inner face of the airtight member into close contact with the refill to close a vent path. When the compression cylinder further advances, the rear space of the refill is pressurized by a compression chamber provided within the compression cylinder. Then, following the advance movement of the compression cylinder, the airtight member and the return spring holder advance together with the refill holder and the refill, and the refill is thereby maintained at the writing position. The elastic member does not make sliding contact with the refill and therefore is not abraded.