Pencil sheath and composition therefor

Details Pencil sheath and composition therefor Pencil sheath and composition therefor

1979-01-09

1979-12-04

Foelak, Morton

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including holder

260 42, 260 18, 521139, 521140, 521910, C08J 906

Patent

active

041769783

ABSTRACT:
There is disclosed a pencil sheath and composition therefor, the pencil having a core of graphite and the like. The sheath composition is composed substantially of plastics, fillers and two kinds of foaming agents with different decomposition temperatures. The pencil sheath has good cutting or sharpening properties, increased bending strength, and good adhesion to the graphite pencil core.

REFERENCES:
patent: 4063828 (1977-12-01), Mukai et al.

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