CA2221189A1 - Cube corner articles exhibiting improved entrance angularity in one or more planes - Google Patents

Cube corner articles exhibiting improved entrance angularity in one or more planes

Info

Publication number
CA2221189A1
CA2221189A1 CA002221189A CA2221189A CA2221189A1 CA 2221189 A1 CA2221189 A1 CA 2221189A1 CA 002221189 A CA002221189 A CA 002221189A CA 2221189 A CA2221189 A CA 2221189A CA 2221189 A1 CA2221189 A1 CA 2221189A1
Authority
CA
Canada
Prior art keywords
cube corner
planes
entrance angularity
edge
sheeting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002221189A
Other languages
French (fr)
Other versions
CA2221189C (en
Inventor
Kenneth L. Smith
Gerald M. Benson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Co
Original Assignee
Minnesota Mining And Manufacturing Company
Kenneth L. Smith
Gerald M. Benson
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minnesota Mining And Manufacturing Company, Kenneth L. Smith, Gerald M. Benson filed Critical Minnesota Mining And Manufacturing Company
Publication of CA2221189A1 publication Critical patent/CA2221189A1/en
Application granted granted Critical
Publication of CA2221189C publication Critical patent/CA2221189C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/122—Reflex reflectors cube corner, trihedral or triple reflector type
    • G02B5/124—Reflex reflectors cube corner, trihedral or triple reflector type plural reflecting elements forming part of a unitary plate or sheet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/2457—Parallel ribs and/or grooves

Abstract

The present invention provides cube corner retroreflective articles that have improved retroreflective performance in at least one plane, and preferably in two or more planes. A preferred article is a retroreflective sheeting that includes a structured surface having at least one array of cube comer elements oriented at a predetermined angle relative to the edge of the article.
The angle is selected to align one broad plane of entrance angularity approximately parallel with the edge of the sheeting and another broad plane of entrance angularity approximately perpendicular to the edge of the sheeting. Individual cube corner elements on the structured surface are canted to yield an isosceles base triangle or a scalene base triangle. Additionally, the structured surface may include a plurality of cube corner element arrays arranged in a tiled fashion to yield greater than two planes of broad entrance angularity.
CA002221189A 1995-06-09 1996-06-06 Cube corner articles exhibiting improved entrance angularity in one or more planes Expired - Lifetime CA2221189C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US9095P 1995-06-09 1995-06-09
US60/000,090 1995-06-09
PCT/US1996/009233 WO1996042025A1 (en) 1995-06-09 1996-06-06 Cube corner articles exhibiting improved entrance angularity in one or more planes

Publications (2)

Publication Number Publication Date
CA2221189A1 true CA2221189A1 (en) 1996-12-27
CA2221189C CA2221189C (en) 2008-08-05

Family

ID=21689874

Family Applications (3)

Application Number Title Priority Date Filing Date
CA002221189A Expired - Lifetime CA2221189C (en) 1995-06-09 1996-06-06 Cube corner articles exhibiting improved entrance angularity in one or more planes
CA002224095A Expired - Lifetime CA2224095C (en) 1995-06-09 1996-06-06 Tiled retroreflective sheeting
CA002224001A Abandoned CA2224001A1 (en) 1995-06-09 1996-06-06 Retroreflective cube corner article having scalene base triangles

Family Applications After (2)

Application Number Title Priority Date Filing Date
CA002224095A Expired - Lifetime CA2224095C (en) 1995-06-09 1996-06-06 Tiled retroreflective sheeting
CA002224001A Abandoned CA2224001A1 (en) 1995-06-09 1996-06-06 Retroreflective cube corner article having scalene base triangles

Country Status (9)

Country Link
US (4) US5822121A (en)
EP (4) EP0830621B1 (en)
JP (3) JP4078449B2 (en)
KR (3) KR100390278B1 (en)
CN (2) CN1147741C (en)
AU (3) AU700594B2 (en)
CA (3) CA2221189C (en)
DE (4) DE69619234T2 (en)
WO (3) WO1996042024A1 (en)

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Also Published As

Publication number Publication date
EP1351072A1 (en) 2003-10-08
EP0830622B1 (en) 2002-02-13
CN1187245A (en) 1998-07-08
DE69619234D1 (en) 2002-03-21
DE69619234T2 (en) 2002-09-19
EP0830621B1 (en) 2001-11-14
WO1996042024A1 (en) 1996-12-27
CA2224095C (en) 2007-03-27
DE69629685D1 (en) 2003-10-02
EP0830621A1 (en) 1998-03-25
JP4078449B2 (en) 2008-04-23
KR19990022405A (en) 1999-03-25
KR100390278B1 (en) 2003-10-10
MX9709397A (en) 1998-07-31
CN1187883A (en) 1998-07-15
JP4078450B2 (en) 2008-04-23
AU6090596A (en) 1997-01-09
JPH11507744A (en) 1999-07-06
CA2221189C (en) 2008-08-05
JP3931256B2 (en) 2007-06-13
DE69636558T2 (en) 2007-06-06
AU6094296A (en) 1997-01-09
US5822121A (en) 1998-10-13
CA2224095A1 (en) 1996-12-27
CN1123784C (en) 2003-10-08
US5926314A (en) 1999-07-20
US5812315A (en) 1998-09-22
EP0830623B1 (en) 2003-08-27
EP0830622A1 (en) 1998-03-25
CA2224001A1 (en) 1996-12-27
DE69617008T2 (en) 2002-07-11
DE69617008D1 (en) 2001-12-20
AU698459B2 (en) 1998-10-29
KR100390277B1 (en) 2003-10-10
KR19990022404A (en) 1999-03-25
CN1147741C (en) 2004-04-28
JPH11507745A (en) 1999-07-06
KR100414267B1 (en) 2004-06-26
JPH11507746A (en) 1999-07-06
EP1351072B1 (en) 2006-09-13
AU700787B2 (en) 1999-01-14
DE69629685T2 (en) 2004-06-17
EP0830623A1 (en) 1998-03-25
WO1996042025A1 (en) 1996-12-27
US5764413A (en) 1998-06-09
DE69636558D1 (en) 2006-10-26
WO1996042023A1 (en) 1996-12-27
AU5988796A (en) 1997-01-09
AU700594B2 (en) 1999-01-07
KR19990022403A (en) 1999-03-25

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Effective date: 20160606