Coating implements with material supply – With means to attach or conform to body of user
Patent
1994-06-28
1996-09-24
Bratlie, Steven A.
Coating implements with material supply
With means to attach or conform to body of user
401 8, D19 48, B43K 2300
Patent
active
055584527
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a holder tube for a writing instrument which is arranged to allow a user to select a desired shape for a grip portion according to the preference of the user, that is, a holder tube which is arranged to allow a user to select a desired grip touch according to the preference of the user.
BACKGROUND OF THE INVENTION
To mitigate fatigue due to long-time writing as much as possible, the grip portions of writing instruments have heretofore been designed in various manners. For example, a grip portion of modified shape or increased diameter is known, and the position of a center of balance is ergonomically determined according to the weight of each writing instrument, and a grip portion provided with an anti-slip part are known. As disclosed in Japanese Utility Model Publication No. 57-24522/1982, it is also known that a grip of large diameter and a grip of small diameter are provided so that a user can select a desired grip to be fitted onto a grip portion according to the choice or preference of the user.
However, although a user can change his or her grip position for a writing instrument by gripping the forward end portion, the middle portion or the rearward portion of the writing instrument according to the preference of the user, it is impossible to change a shape of the grip portion of the writing instrument, so that there still remains a problem in that the user feels fatigue after continuous, long-time writing. Further, there is a problem in terms of design since the shape of the conventional grip portion of the writing instrument is fixed and cannot be changed. In the art disclosed in Japanese Utility Model Publication No. 57-24522/1982, although it is possible to provide different grip touches by selecting either one of the grip portions of large diameter and small diameter, the number of selectable grip touches is limited.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a holder tube for a writing instrument which allows a user to select a desired grip touch from among a wide variety of grip touches according to the preference of the user so that fatigue due to long-time writing can be mitigated as much as possible.
This invention has been made to achieve the above object, and a first feature of the invention resides in a holder tube for a writing instrument in which a plurality of rings having external faces subjected to different treatments are removably disposed in at least a grip portion of the holder tube. A second feature of the invention resides in a holder tube for a writing instrument in which a plurality of rings having non-circular external faces are disposed in at least a grip portion of the holder tube in such a manner that the state of each of the rings differs from that of the adjacent one. A third feature of the invention resides in a holder tube for a writing instrument in which not less than three rings having different diameters are removably disposed in at least a grip portion of the holder tube. A fourth feature of the invention resides in a holder tube for a writing instrument in which a ring or rings having longitudinally different external shapes are removably disposed in at least a grip portion of the holder tube. A fifth feature of the invention resides in the holder tube in which the rings according to the fourth feature are a plurality of kinds of rings.
In accordance with any of the aforesaid constructions, it is possible for each individual user to change its grip portion so that a desired grip touch can be obtained according to the taste or preference of the user. It is also possible to provide a holder tube for a writing instrument having an additional advantage which can widen the range of variations of the design of the holder tube.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a partially omitted, longitudinally sectional view of a writing instrument showing an embodiment of the present invention;
FIG. 2 is a perspective view of a ring according to an example;
FIG. 3 is a persp
REFERENCES:
patent: 132174 (1872-10-01), Orton
patent: 1376115 (1921-04-01), Record
patent: 1395793 (1921-11-01), Brosehart
patent: 1577548 (1926-03-01), Upton
patent: 2173451 (1939-09-01), Lorber
patent: 4035089 (1977-07-01), Schwartz et al.
Hoshi Takayuki
Oka Shigeo
Bratlie Steven A.
Pentel Kabushiki Kaisha
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