Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to advance material
Patent
1987-10-30
1989-10-10
Apley, Richard J.
Coating implements with material supply
Solid material for rubbing contact or support therefor
Including means to advance material
401 67, 401 93, 401 94, B43K 2122
Patent
active
048727768
ABSTRACT:
A lead chuck of a mechanical pencil to be assembled into a lead feeding mechanism of a rear end knock type, an automatic lead feeding type and an extremity end knock type mechanical pencil in which it is arranged within the sleeve through a resilient member in such a way as it may be advanced or retracted. A lead holding part is formed at the extremity end portions of the divided surfaces of the chuck members which are fully divided into two sections along an axial plane. The lead holding part is formed with several teeth for use in holding the lead under four-point or six-point contacted condition within axially formed grooves made at the central portions of the divided surfaces. The teeth are projected in several rows and formed at the raised surfaces of the grooves. Stepped partial circumferential projections are projected and formed at the central part of the raised parts of the front portions of the semi-circumferential flange which are projected and formed at the outer circumference at the rear ends of the chuck members. Other stepped projections are formed at both end portions of the raised rear surfaces of the opposite sides of the flange, thereby the extremity end of the lead supplying cylinder extremity end receiving element is abutted against the rear raised surface of the flange part from the rear end side of the lead chuck. Forces applied from both directions, when the front raised surface of the flange part receive the rear end of the resilient member installed between it and the sleeve, are utilized and each of the chuck members generates a flexing phenomenon and the chuck members may then perform an instantaneous expanding operation under this flexing force.
REFERENCES:
patent: 1296011 (1919-03-01), Roll
patent: 1724412 (1929-08-01), Pollak
patent: 2801613 (1957-08-01), Gigli
patent: 4571105 (1986-02-01), Sekiguchi
patent: 4729684 (1988-03-01), Sakaoka
Kageyama Hidehei
Mitsuya Yoshihide
Nakazato Yoichi
Apley Richard J.
Gubernick Franklin L.
Kotobuki & Co. Ltd.
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