| 发明名称 |
Tip for fibre-tip pens - produced from thermoplastic granules by heating and treatment with chromic acid |
| 摘要 |
<p>Tips for fibre-tip pens are produced by sintering thermoplastic granules, pref. spherical, of diameter 100-600 mu. PROCESS The granules are heated in a moud until the granule surface softens and then treated for 1-3 hrs. in cold chromosulphuric acid, washed and dried in vacuo at 60 degrees C. (5 pp.).</p> |
| 申请公布号 |
DE2441883(A1) |
申请公布日期 |
1976.03.11 |
| 申请号 |
DE19742441883 |
申请日期 |
1974.08.31 |
| 申请人 |
GUENTHER WAGNER PELIKAN-WERKE GMBH, 3000 HANNOVER |
发明人 |
KUPFERSCHMIDT, WOLFGANG, ING.(GRAD.), 3001 RESSE |
| 分类号 |
B43K1/00;(IPC1-7):43K8/02 |
主分类号 |
B43K1/00 |
| 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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