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:
Nov. 13, 1990
Filed:
Oct. 18, 1985
Masahiko Nagai, Tokyo, JP;
Ogawa Chemical Industries Ltd., Tokyo, JP;
Abstract
A mechanical marking pen is disclosed. The marking pen includes a cylinder and a holder element axially and movably engaged with one end of the cylinder. A pen point is removably attached to the cylinder and is slidably fitted concentrically in the holder element so as to project from the holder element to permit a length of projection to be adjusted. There is an ink reservoir contained in the cylinder for storing ink. An ink guide core is provided to connect the pen point and ink reservoir to allow the transfer of ink to the pen point. There is an element concentric with the pen point, for receiving and transferring writing pressure from the pen point. Finally, an element is mounted concentric with the pen point and is engaged with the receiving and transferring element. This element accepts writing pressure from the transferring means to prevent the ink guide core from bearing pressure from the pen point.