发明名称 |
Pencil sheath and composition therefor |
摘要 |
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.
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申请公布号 |
US4176978(A) |
申请公布日期 |
1979.12.04 |
申请号 |
US19790002104 |
申请日期 |
1979.01.09 |
申请人 |
LORENZ, JINDRICH;MAREK, VLADIMIR;RUZICKA, JAN;TUSL, MIROSLAV |
发明人 |
LORENZ, JINDRICH;MAREK, VLADIMIR;RUZICKA, JAN;TUSL, MIROSLAV |
分类号 |
C08J9/00;C08J9/06;C09D13/00;(IPC1-7):C08J9/06 |
主分类号 |
C08J9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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