发明名称 |
Tear starting mechanism for tear shades |
摘要 |
A shade of adjustable width is provided in which portions can be removed by tearing along score lines, and means including pull tabs are provided whereby a portion in the margin of the shade may be removed leaving a widened opening which terminates at an apex at a given score line such that pulling adjacent portions of the shade material concentrates stress at the score line and promotes clean tearing therealong.
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申请公布号 |
US4438799(A) |
申请公布日期 |
1984.03.27 |
申请号 |
US19820370595 |
申请日期 |
1982.04.21 |
申请人 |
KENNEY MANUFACTURING COMPANY |
发明人 |
COMEAU, PAUL E. |
分类号 |
E06B9/40;(IPC1-7):A47G5/02 |
主分类号 |
E06B9/40 |
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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