Method of manufacturing a drafting triangle
    6.
    发明授权
    Method of manufacturing a drafting triangle 失效
    制造三角形方法

    公开(公告)号:US3555657A

    公开(公告)日:1971-01-19

    申请号:US3555657D

    申请日:1968-02-16

    IPC分类号: B43L7/027 B23Q17/00

    CPC分类号: B43L7/0275

    摘要: A METHOD OF MANUFACTURING A DRAFTING TRIANGLE FROM ACRYLIC SHEET PLASTIC BY SAWING A TRIANGLE PIECE OF PREDETERMINED SIZE FROM A PLASTIC SHEET, MILLING THE SIDES TO PROVIDE SQUARE GUIDING SURFACES AND CUTTING THE EDGES AT APPROXIMATELY A 45* ANGLE TO THE TOP AND BOTTOM TRIANGLE SURFACES AT A DEPTH OF APPROXIMATELY .005 OF AN INCH.