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US 2006/0140706 A1Published application
Writing implement
AssigneeThe Pilot Ink Co., Ltd.
InventorHisashi Iwata
Life of this patent
Estimating the term…
Abstract
The outer surface of an inner cap 3 is fixedly secured to the inner surface of an outer cap 4. In the opened end portion of the inner cap 3, there is formed a rear end shell portion 31 which projects backwardly. On the outer peripheral surface of the rear end shell portion 31, there is provided a ring-shaped outward facing seal portion. In the front end portion of a barrel 6, there is formed a front end shell portion 61 projecting forwardly. In the inner peripheral surface of the front end shell portion 61, there is formed a ring-shaped inward facing seal portion. When a cap 2 is mounted on the pen tip 8 side of the barrel 6, the outward facing seal portion can be closely contacted with the inward facing seal portion in the radial direction.
Claims11
A writing implement, comprising:
- a cap comprising:
- an inner cap having a closed front end portion and an opened rear end portion;
- and
- an outer cap fixed to an outer surface of the inner cap, at least a rear end of the outer cap being opened;
- and
- a writing implement main body for mounting the cap removably thereon, and including a barrel having a pen tip on a front end portion,
- wherein, when the cap is mounted on the pen tip side of the barrel, the inner cap seals the pen tip and an inner surface of the outer cap is fitted with an outer surface of the barrel,
- characterized in that:
- a backwardly projecting rear end shell portion is formed in the opened rear end portion of the inner cap,
- a ring-shaped outward facing seal portion is formed in an outer peripheral surface of the rear end shell portion,
- a forwardly projecting front end shell portion is formed in the front end portion of the barrel,
- a ring-shaped inward facing seal portion is formed in an inner peripheral surface of the front end shell portion, and
- when the cap is mounted onto the pen tip side of the barrel, the outward facing seal portion closely contacts with the inward facing seal portion in a radial direction.
10 more elements
A writing implement, comprising:
- a cap comprising:
- an inner cap having a closed front end portion and an opened rear end portion;
- and
- an outer cap fixed to an outer surface of the inner cap, at least a rear end of the outer cap being opened;
- and
- a writing implement main body for mounting the cap removably thereon, and including a barrel having a pen tip on a front end portion,
- wherein, when the cap is mounted on the pen tip side of the barrel, the inner cap seals the pen tip and an inner surface of the outer cap is fitted with an outer surface of the barrel,
- characterized in that:
- a backwardly projecting rear end shell portion is formed in the opened end portion of the inner cap,
- a ring-shaped outward facing seal portion is formed in an outer peripheral surface of the rear end shell portion,
- a forwardly projecting front end shell portion is formed in the front end portion of the barrel,
- a ring-shaped inward facing seal portion is formed in an inner peripheral surface of the front end shell portion,
- when the cap is mounted onto the pen tip side of the barrel, the outward facing seal portion closely contacts with the inward facing seal portion in the radial direction,
- a ventilating hole is formed in a side wall or a top wall of the outer cap so as to penetrate therethrough, and
- when the outward facing seal portion and the inward facing seal portion are not in close contact with each other, an interior of the inner cap and an the exterior of the outer cap are allowed to communicate with each other through the ventilating hole.
12 more elements
A writing implement, comprising:
- a cap comprising:
- an inner cap having a closed front end portion and an opened rear end portion;
- and
- an outer cap fixed to an outer surface of the inner cap, having a closed front end portion and an opened rear end portion;
- and
- a writing implement main body for mounting the cap removably thereon, and including a barrel having a pen tip on a front end thereof,
- wherein when the cap is mounted on the pen tip side of the barrel, the inner cap seals the pen tip and an inner surface of the outer cap is fitted with an outer surface of the barrel,
- characterized in that:
- a backwardly projecting rear end shell portion is formed in the opened end portion of the inner cap,
- a ring-shaped outward facing seal portion is formed in an outer peripheral surface of the rear end shell portion,
- a forwardly projecting front end shell portion is formed in the front end portion of the barrel,
- a ring-shaped inward facing seal portion is formed in an inner peripheral surface of the front end shell portion,
- when the cap is mounted onto the pen tip side of the barrel, the outward facing seal portion closely contacts with the inward facing seal portion in a radial direction,
- a ventilating hole is formed in a side wall or a top wall of the outer cap so as to penetrate therethrough, and
- when the outward facing seal portion and the inward facing seal portion are not in close contact with each other, an interior of the inner cap and an exterior of the outer cap are allowed to communicate with each other through the ventilating hole.
12 more elements
Dependencies are inferred from the claim text.