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Title:
HEXAGONAL CORNER CUBE RETROREFLECTIVE ARTICLE
Document Type and Number:
WIPO Patent Application WO/2010/131630
Kind Code:
A1
Abstract:
Provided is a hexagonal corner cube retroreflective article having excellent observation-angle characteristics. Said article comprises an aggregation of many hexagonal corner cube retroreflective elements, each of which is characterized in that at least one reflective surface (surface a, surface b, and/or surface c) is partitioned, by a line segment (EF, FD, and/or DE) connecting vertices (E, F, and/or D) that constitute said reflective surface, into a pair comprising an upper secondary reflective surface (surface a1, surface b1, and/or surface c1) and a lower secondary reflective surface (surface a2, surface b2, and/or surface c2). Each hexagonal corner cube retroreflective element is further characterized in that the two secondary reflective surfaces that constitute the aforementioned pair of secondary reflective surfaces are not in the same plane.

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Inventors:
MIMURA IKUO (JP)
AMEMIYA KEIJI (JP)
SHOZEN MITSUGU (JP)
Application Number:
PCT/JP2010/057907
Publication Date:
November 18, 2010
Filing Date:
May 10, 2010
Export Citation:
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Assignee:
NIPPON CARBIDE KOGYO KK (JP)
MIMURA IKUO (JP)
AMEMIYA KEIJI (JP)
SHOZEN MITSUGU (JP)
International Classes:
G02B5/124; E01F9/619
Domestic Patent References:
WO2007064033A12007-06-07
Foreign References:
JP3310297B22002-08-05
US1591572A1926-07-06
JP2004525415A2004-08-19
US1591572A1926-07-06
US3417959A1968-12-24
US3922065A1975-11-25
US3458245A1969-07-29
US3924929A1975-12-09
US4066331A1978-01-03
US4073568A1978-02-14
US4189209A1980-02-19
US6114009A2000-09-05
JPS63109233U1988-07-14
US6120280A2000-09-19
US6010609A2000-01-04
US6318866B12001-11-20
US4775219A1988-10-04
Other References:
See also references of EP 2431774A4
Attorney, Agent or Firm:
MORIMURA, Yasuo et al. (JP)
Yasuo Morimura (JP)
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Claims:



 
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