Sheet containing contour-dependent directional image and...

Details Sheet containing contour-dependent directional image and... Sheet containing contour-dependent directional image and...

B - Operations, Transporting

42

D

283/24, 283/25

B42D 15/10 (2006.01) G02B 3/00 (2006.01) G02B 5/128 (2006.01)

Patent

CA 1267173

Abstract 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.

516243

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