Coating implements with material supply – Plural tools including projectable and retractable tool – Single actuator for simultaneous projection of one tool and...
Patent
1979-09-10
1981-06-02
Coven, Edward M.
Coating implements with material supply
Plural tools including projectable and retractable tool
Single actuator for simultaneous projection of one tool and...
401 32, B43K 2720
Patent
active
042708699
ABSTRACT:
A composite writing instrument having a lower tubular casing accommodating therewithin two retractable mechanical pencil units spaced by about 180.degree.. An upper tubular casing encloses a cam mechanism for effecting a reciprocal rotational motion through about 180.degree. around the axis of the instrument and engaging both pencil units for alternately shifting them in the axial direction whereby the two pencil units can be alternately advanced to a writing position through an opening at the lower end of the lower tubular casing, or retracted to a retracted position within the lower tubular casing. A feeding operation for advancing the lead of the pencil unit in the writing position is effected by reciprocating of the upper tubular casing in the axial direction.
REFERENCES:
patent: 3266465 (1966-08-01), Ganz
patent: 3274976 (1960-09-01), Levain
patent: 3814524 (1974-06-01), Sperti
patent: 3898008 (1975-08-01), Ganz
patent: 3989389 (1976-11-01), Hashimoto et al.
patent: 4080077 (1978-03-01), Schumacher
Coven Edward M.
Zebra Co. Ltd.
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