发明名称 Lead for writing, drawing and painting utensils
摘要 A lead for writing, drawing and painting utensils has a colorant lead core and at least one lead coat extending in the direction of the longitudinal axis. The at least one lead coat envelopes the lead core as seen in cross section of the lead and the lead coat and lead core are immovably mounted relative to each other. The at least one lead coat has a higher bending strength than the lead core.
申请公布号 US2006194049(A1) 申请公布日期 2006.08.31
申请号 US20060342275 申请日期 2006.01.26
申请人 J.S. STAEDTLER GMBH & CO. 发明人 THIES ANDREAS;LEHRER CHRISTA;REINER JURGEN;DELAPIERRE CHRISTINE;NEIN ROBERT;OCHSENKUHN FRANZ;HEINDL MAX
分类号 C09D13/00;D02G3/00 主分类号 C09D13/00
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