Writing implement
AssigneeMitsubishi Pencil Company, Limited
InventorsTooru Nakajima, Takeo Fukumoto, Kazuhiko Furukawa
Life of this patent
Estimating the term…
Abstract
Lines can be freely varied in thickness, and lines with characteristics such as “stops”, “flicks”, and “sweeping strokes” can be written easily, even with a felt-tip pen, marker pen, or the like. Moreover, a pen-tip does not readily become damaged or worn. A writing implement includes a shaft, an ink supply core such as that of a felt-tip pen or a marker pen, and a core surrounding member that covers the ink supply core. The writing implement is formed capable of contacting a tip of the ink supply core and a tip of the core surrounding member against a writing surface at the same time by using a joint capable of changing a relative positional relationship between the ink supply core and the core surrounding member.
Claims4
A writing implement comprising:
- a shaft;
- an ink supply core that is housed inside the shaft, and that is capable of guiding ink by capillary force;
- a collector core in contact with a proximal end of the ink supply core;
- a core surrounding member that covers an outer periphery of the ink supply core such that a portion of the ink supply core and a portion of the core surrounding member are exposed at a leading end of the shaft;
- and
- a joint that is capable of changing a relative positional relationship between the ink supply core and the core surrounding member in an axial direction,
- wherein the ink supply core is moved by elastic deformation of the joint, thereby causing the ink supply core to move relatively rearward with respect to the core surrounding member so as to enable a tip of the ink supply core and a tip of the core surrounding member to contact a writing surface at the same time.
Dependencies are inferred from the claim text.