Coating implements with material supply – Solid material for rubbing contact or support therefor – Combined
Patent
1994-02-17
1997-12-23
Hafer, Robert A.
Coating implements with material supply
Solid material for rubbing contact or support therefor
Combined
401 64, B43K 2500, B43K 2110
Patent
active
057001014
ABSTRACT:
This invention is to a writing tool such as mechanical pencil or a ballpoint pen in which a writing shaft having a head member is inserted in an outer sleeve in such a manner that the head member projects from the outer sleeve. A stair or step and a spiral groove are provided on the forward inner surface and the rearward inner surface of a tubular cap, respectively, with an inside diameter of the rear part of the spiral groove being larger. A bearing part is brought into contact with a lead tank provided inside a forward art of the tubular part so that the forward part of the outer sleeve is movable in the axial direction and is locked in the turning direction against a rearward inner surface of the outer sleeve. The rearward part of the tubular body is provided with a slit, holding pieces of a stick-shaped object holder slidably inserted in said slit. A stick-shaped object is held by the holding pieces, and the projection is provided on each holder engaged with the spiral groove of the tubular cap.
REFERENCES:
patent: 3586452 (1971-06-01), Mason
patent: 3623822 (1971-11-01), Davidson
patent: 4901101 (1990-02-01), Petterson
Kageyama Shuhei
Kageyama Toshihiko
Mitsuya Yoshihide
Nakazato Youichi
Hafer Robert A.
Kotobuki & Co. Ltd.
Muir D. Neal
O'Reilly David
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