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:
Sep. 03, 1991
Filed:
Dec. 14, 1989
Cheng-Hwa Chuang, Taipei, TW;
Pioneer Industrial Corp., Taipei, TW;
Abstract
A writing instrument in which plural cartridges are fitted and coupled in series with each other in their longitudinal direction so that the cartridges are removable from each other. Each of the cartridges comprises a tubular body having a tubular projection at one end of the tubular body and having an optionally shaped cross section, and a core unit inserted in the tubular projection so that the core unit is held in it. The tubular body has an insertion hole into which the tubular projection of the adjacent cartridge, which is coupled to the tubular body, is fitted in the longitudinal direction of each cartridge so that the tubular projection is held in the insertion hole removable from it. The former tubular projection has an insertion hole in which the core unit of the adjacent cartridge is housed. The circumferential outside of the tubular body has at least one engagement projection and at least one engagement groove, each of which can be engaged with the engagement groove or engagement projection of the tubular body of another cartridge so as to couple the cartridge in parallel with each other in their transverse direction removably from each other.