Mechanical pencil

Details Mechanical pencil Mechanical pencil

2008-10-15

2010-10-05

Walczak, David J (Department: 3751)

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including holder

C401S092000

Reexamination Certificate

active

07806615

ABSTRACT:
A chuck (4) for grasping a writing lead and a rotor (6) arranged to be movable in a direction of rotation and an axial direction within a body cylinder (1). A rotational drive mechanism for the writing lead is formed such that first and second cam faces (6a) and (6b) are respectively formed at one end face and another end face of the rotor in the axial direction, and first and second fixed cam faces (13a) and (14a) are arranged on the body cylinder side to face the above-mentioned first and second cam faces respectively. A pipe end (7) for guiding the writing lead to interlock with retreat and forward movement of the writing lead while the writing proceeds is arranged to move in the same direction, in conjunction with retreat and forward movement of the above-mentioned chuck.

REFERENCES:
patent: 4411543 (1983-10-01), Hashimoto et al.
patent: 6481908 (2002-11-01), Lychwick
patent: 6702495 (2004-03-01), Lychwick
patent: 54-25339 (1979-02-01), None
patent: 58-50983 (1983-04-01), None
patent: 59-107286 (1984-07-01), None
patent: 8-197887 (1996-08-01), None
patent: 10-329485 (1998-12-01), None
patent: 11-99795 (1999-04-01), None
patent: 3882272 (2007-02-01), None
patent: 3885315 (2007-02-01), None
International Search Report of PCT/JP2008/068628, mailing date of Nov. 11, 2008.

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