| 发明名称 |
Sheet containing contour-dependent directional image and method for forming the same |
| 摘要 |
A sheet having a set of axial markings viewable as a contour-dependent, directional image. The image is intact only when the sheet is in substantially a predetermined contour and viewed within a predetermined conical field of view. Also a method for forming such sheets.
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| 申请公布号 |
US4714656(A) |
申请公布日期 |
1987.12.22 |
| 申请号 |
US19860944458 |
申请日期 |
1986.12.19 |
| 申请人 |
MINNESOTA MINING AND MANUFACTURING COMPANY |
发明人 |
BRADSHAW, THOMAS I.;ORENSTEEN, BRUCE D.;COOK, JACK E. |
| 分类号 |
B65D53/00;B32B3/26;B32B7/02;B42D15/10;G02B3/00;G02B5/128;(IPC1-7):B32B9/04;G03C3/00;B65D33/14 |
主分类号 |
B65D53/00 |
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代理人 |
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