CA2242771A1 - Dual orientation retroreflective sheeting - Google Patents

Dual orientation retroreflective sheeting

Info

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
Application number
CA002242771A
Other languages
French (fr)
Other versions
CA2242771C (en
Inventor
Susan K. Nestegard
Gerald M. Benson
Cheryl M. Frey
John C. Kelliher
Kenneth L. Smith
Theodore J. Szczech
James E. Lasch
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
Susan K. Nestegard
Gerald M. Benson
Cheryl M. Frey
John C. Kelliher
Kenneth L. Smith
Theodore J. Szczech
James E. Lasch
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24350923&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2242771(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Minnesota Mining And Manufacturing Company, Susan K. Nestegard, Gerald M. Benson, Cheryl M. Frey, John C. Kelliher, Kenneth L. Smith, Theodore J. Szczech, James E. Lasch filed Critical Minnesota Mining And Manufacturing Company
Publication of CA2242771A1 publication Critical patent/CA2242771A1/en
Application granted granted Critical
Publication of CA2242771C publication Critical patent/CA2242771C/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

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.
CA002242771A 1996-01-19 1996-12-05 Dual orientation retroreflective sheeting Expired - Lifetime CA2242771C (en)

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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AU1146397A (en) 1997-08-11
CN1214120A (en) 1999-04-14
DE875008T1 (en) 2000-11-09
DE69622754T3 (en) 2010-12-23
ES2144981T1 (en) 2000-07-01
ATE221670T1 (en) 2002-08-15
KR100414266B1 (en) 2004-05-20
CA2242771C (en) 2004-10-12
US5706132A (en) 1998-01-06
DE69622754D1 (en) 2002-09-05
US5936770A (en) 1999-08-10
EP0875008A1 (en) 1998-11-04
AU712593B2 (en) 1999-11-11
WO1997026567A1 (en) 1997-07-24
DE69622754T2 (en) 2003-04-24
CN1284981C (en) 2006-11-15
BR9612442A (en) 1999-07-13
EP0875008B2 (en) 2010-06-23
EP0875008B1 (en) 2002-07-31
KR19990077381A (en) 1999-10-25

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