Writing implement
AssigneeMitsubishi Pencil Company, Limited
InventorsTooru NAKAJIMA, Takeo FUKUMOTO, Gouya OONO
Life of this patent
Estimating the term…
Abstract
An object is to provide a writing implement allowing the width of a drawn line to be freely changed by writing pressure that is capable of application to a narrow-shafted felt-tip pen or marker pen. The writing implement includes a shall tube, an ink supply core that is housed inside the shaft tube and that guides ink by capillary action, and a core surrounding member that is fitted to a leading end of the shaft tube, that is penetrated by the ink supply core, and from which a tip of the ink supply core projects. The ink supply core is configured to retract at a tip of the core surrounding member under writing pressure, and a projection dimension of the ink supply core from the tip of the core surrounding member is from 0.05 mm to 0.7 mm.
Claims13
A writing implement comprising:
- a shaft tube;
- an ink supply core that is housed inside the shaft tube and that guides ink by capillary action;
- and
- a core surrounding member that is fitted to a leading end of the shaft tube, that is penetrated by the ink supply core, and from which a tip of the ink supply core projects,
- the ink supply core being configured to retract at a tip of the core surrounding member under writing pressure, and
- a projection dimension of the ink supply core from the tip of the core surrounding member being from 0.05 mm to 0.7 mm when not being used to write.
Dependencies are inferred from the claim text.