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. 07, 2016
Filed:
Feb. 20, 2013
Mitsubishi Pencil Company, Limited, Tokyo, JP;
Hirotake Izawa, Yokohama, JP;
Kei Oomoto, Yokohama, JP;
MITSUBISHI PENCIL COMPANY, LIMITED, Tokyo, JP;
Abstract
A mechanical pencil is provided which does not require operation of removing or re-fitting a cap but allows writing immediately after supplying a writing lead. A lead fixing chuckwhich is moved back and forth in conjunction with knock operation of a knock barto release and grip the writing lead L, and a holder chuckwhich is provided in front of the lead fixing chuck and holds the writing lead frictionally are arranged such that the writing lead can be gradually inched out by repeating the knock operation. An open/close mechanism having an open/close valveis provided in which a writing lead feeding unit is opened in a situation where the grip of the lead fixing chuckon the writing lead is released by the knock operation, and the holder chuckis disposed proximate to a writing lead outlet.