CA2242771A1 - Dual orientation retroreflective sheeting - Google Patents
Dual orientation retroreflective sheetingInfo
- Publication number
- CA2242771A1 CA2242771A1 CA002242771A CA2242771A CA2242771A1 CA 2242771 A1 CA2242771 A1 CA 2242771A1 CA 002242771 A CA002242771 A CA 002242771A CA 2242771 A CA2242771 A CA 2242771A CA 2242771 A1 CA2242771 A1 CA 2242771A1
- Authority
- CA
- Canada
- Prior art keywords
- sheeting
- cube corner
- pascals
- elastic modulus
- overlay film
- 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
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
Abstract
A cube corner retroreflective sheeting construction comprising alternating zones of cube corner element arrays disposed at approximately ninety degrees orientations to provide exactly two principal planes of improved retroreflective performance in response to light incident on the sheeting at high entrance angles is disclosed. According to one embodiment the sheeting includes a body layer which has an elastic modulus less than 7 X 10 8 pascals and cube comer elements formed from a material which has an elastic modulus greater than 16 X 10 8 pascals. According to a second embodiment the sheeting includes an overlay film having two major surfaces and comprising a first polymeric material and a plurality of arrays of substantially independent cube corner elements bonded to a major surface of the overlay film having a minimal, fractured land.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/587,719 US5706132A (en) | 1996-01-19 | 1996-01-19 | Dual orientation retroreflective sheeting |
US08/587719 | 1996-01-19 | ||
PCT/US1996/019318 WO1997026567A1 (en) | 1996-01-19 | 1996-12-05 | Dual orientation retroreflective sheeting |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2242771A1 true CA2242771A1 (en) | 1997-07-24 |
CA2242771C CA2242771C (en) | 2004-10-12 |
Family
ID=24350923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002242771A Expired - Lifetime CA2242771C (en) | 1996-01-19 | 1996-12-05 | Dual orientation retroreflective sheeting |
Country Status (11)
Country | Link |
---|---|
US (2) | US5706132A (en) |
EP (1) | EP0875008B2 (en) |
KR (1) | KR100414266B1 (en) |
CN (1) | CN1284981C (en) |
AT (1) | ATE221670T1 (en) |
AU (1) | AU712593B2 (en) |
BR (1) | BR9612442A (en) |
CA (1) | CA2242771C (en) |
DE (2) | DE69622754T3 (en) |
ES (1) | ES2144981T1 (en) |
WO (1) | WO1997026567A1 (en) |
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US5213872A (en) * | 1991-04-19 | 1993-05-25 | Stimsonite Corporation | Preprinted retroreflective highway sign and method for making the sign |
US5182663A (en) * | 1991-08-30 | 1993-01-26 | Raychem Corporation | Liquid crystal display having improved retroreflector |
US5189553A (en) * | 1992-06-08 | 1993-02-23 | Minnesota Mining And Manufacturing Company | Optimized construction of retroreflective articles for curved applications |
US5300263A (en) * | 1992-10-28 | 1994-04-05 | Minnesota Mining And Manufacturing Company | Method of making a microlens array and mold |
DE4240680C2 (en) * | 1992-12-03 | 1996-12-19 | Gubela Sen Hans Erich | Reflector surface consisting of a large number of microtrips |
US5272562A (en) * | 1993-02-05 | 1993-12-21 | Minnesota Mining And Manufacturing Company | Cube-corner retroreflective articles |
US5637173A (en) * | 1993-02-17 | 1997-06-10 | Reflexite Corporation | Method for forming a retroreflective structure having free-standing prisms |
US5376431A (en) * | 1993-05-12 | 1994-12-27 | Reflexite Corporation | Retroreflective microprism sheeting with silver/copper reflecting coating and method of making same |
WO1995003558A1 (en) * | 1993-07-19 | 1995-02-02 | Reflexite Corporation | Retroreflective structure |
US5648145A (en) * | 1993-09-10 | 1997-07-15 | Reflexite Corporation | Fire-resistant, retroreflective structure |
CA2171745A1 (en) * | 1993-10-20 | 1995-04-27 | Kenneth L. Smith | Raised zone retroreflective cube corner article and method of manufacture |
CA2173148A1 (en) * | 1993-10-20 | 1995-04-27 | Kenneth L. Smith | Multiple structure cube corner article and method of manufacture |
CA2173231A1 (en) * | 1993-10-20 | 1995-04-27 | Gerald M. Benson | Asymetric cube corner article and method of manufacture |
US5450235A (en) * | 1993-10-20 | 1995-09-12 | Minnesota Mining And Manufacturing Company | Flexible cube-corner retroreflective sheeting |
EP0787311B1 (en) * | 1994-09-28 | 1999-05-12 | Reflexite Corporation | Retroreflective tilted prism structure |
US5565151A (en) * | 1994-09-28 | 1996-10-15 | Reflexite Corporation | Retroreflective prism structure with windows formed thereon |
CA2224095C (en) * | 1995-06-09 | 2007-03-27 | Kenneth L. Smith | Tiled retroreflective sheeting |
US5706132A (en) * | 1996-01-19 | 1998-01-06 | Minnesota Mining And Manufacturing Company | Dual orientation retroreflective sheeting |
EP0876247B1 (en) * | 1996-01-26 | 2000-12-06 | Minnesota Mining And Manufacturing Company | Stacked laminate mold and method of making |
US6015214A (en) * | 1996-05-30 | 2000-01-18 | Stimsonite Corporation | Retroreflective articles having microcubes, and tools and methods for forming microcubes |
-
1996
- 1996-01-19 US US08/587,719 patent/US5706132A/en not_active Expired - Lifetime
- 1996-12-05 CN CNB961801646A patent/CN1284981C/en not_active Expired - Lifetime
- 1996-12-05 AT AT96942885T patent/ATE221670T1/en not_active IP Right Cessation
- 1996-12-05 CA CA002242771A patent/CA2242771C/en not_active Expired - Lifetime
- 1996-12-05 ES ES96942885T patent/ES2144981T1/en active Pending
- 1996-12-05 WO PCT/US1996/019318 patent/WO1997026567A1/en active IP Right Grant
- 1996-12-05 DE DE69622754T patent/DE69622754T3/en not_active Expired - Lifetime
- 1996-12-05 DE DE0875008T patent/DE875008T1/en active Pending
- 1996-12-05 AU AU11463/97A patent/AU712593B2/en not_active Expired
- 1996-12-05 KR KR10-1998-0705556A patent/KR100414266B1/en not_active IP Right Cessation
- 1996-12-05 EP EP96942885A patent/EP0875008B2/en not_active Expired - Lifetime
- 1996-12-05 BR BR9612442A patent/BR9612442A/en not_active IP Right Cessation
-
1997
- 1997-07-02 US US08/887,006 patent/US5936770A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN1284981C (en) | 2006-11-15 |
US5706132A (en) | 1998-01-06 |
DE69622754D1 (en) | 2002-09-05 |
AU1146397A (en) | 1997-08-11 |
US5936770A (en) | 1999-08-10 |
DE875008T1 (en) | 2000-11-09 |
EP0875008B1 (en) | 2002-07-31 |
CA2242771C (en) | 2004-10-12 |
DE69622754T2 (en) | 2003-04-24 |
DE69622754T3 (en) | 2010-12-23 |
BR9612442A (en) | 1999-07-13 |
ATE221670T1 (en) | 2002-08-15 |
KR100414266B1 (en) | 2004-05-20 |
ES2144981T1 (en) | 2000-07-01 |
AU712593B2 (en) | 1999-11-11 |
WO1997026567A1 (en) | 1997-07-24 |
EP0875008B2 (en) | 2010-06-23 |
KR19990077381A (en) | 1999-10-25 |
CN1214120A (en) | 1999-04-14 |
EP0875008A1 (en) | 1998-11-04 |
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