Mechanical pencil

Details Mechanical pencil Mechanical pencil

2006-10-31

2006-10-31

Le, Huyen (Department: 3751)

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including holder

Reexamination Certificate

active

07128487

ABSTRACT:
In a mechanical pencil, the dispersion range of the diameter of a lead is allowable to a certain extent, but if by chance a lead having the maximum diameter is used the lead may not be delivered. This is because there is exceeded the allowable range of the elastic deformation of an elastic thin film, namely, a lead holding member. The mechanical pencil includes the lead holding member disposed in the neighborhood of the tip of a shaft tube, in which the exterior shape of the lead holding member is formed to be slightly smaller than the interior shape of the shaft tube in which the lead holding member is disposed, and an inner step portion for preventing the dropping of the lead holding member from the shaft tube is disposed in the front portion of the lead holding member.

REFERENCES:
patent: 2174979 (1939-10-01), Hauton
patent: 4281939 (1981-08-01), Mitsuya
patent: 5085534 (1992-02-01), Kenichi et al.
patent: 1151874 (2001-11-01), None
patent: 58032959 (1983-07-01), None
patent: 62087884 (1987-06-01), None
patent: 2099689 (1990-08-01), None
patent: 09183294 (1997-07-01), None
patent: 00015986 (2000-01-01), None

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