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CA2064484A1 - Retroreflective sheet - Google Patents

Retroreflective sheet

Info

Publication number
CA2064484A1
CA2064484A1 CA2064484A CA2064484A CA2064484A1 CA 2064484 A1 CA2064484 A1 CA 2064484A1 CA 2064484 A CA2064484 A CA 2064484A CA 2064484 A CA2064484 A CA 2064484A CA 2064484 A1 CA2064484 A1 CA 2064484A1
Authority
CA
Canada
Prior art keywords
adhesive
formations
impinging
sheeting
predominant
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
CA2064484A
Other languages
French (fr)
Other versions
CA2064484C (en
Inventor
William P. Rowland
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.)
Reflexite Corp
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2064484A1 publication Critical patent/CA2064484A1/en
Application granted granted Critical
Publication of CA2064484C publication Critical patent/CA2064484C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0418—Constructional details
    • G09F13/0472—Traffic signs
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/16—Signs formed of or incorporating reflecting elements or surfaces, e.g. warning signs having triangular or other geometrical shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2551/00—Optical elements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Geometry (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

A retroflective material retroreflects a white coloration for light beams impinging thereon at night and appears to have the coloration of the underlying support in daylight. This material utilizes retroreflective sheeting having closely spaced microretroreflective formations on one surface, and a transparent adhesive in a pattern over that surface so as to leave the predominant portion of the surface free from adhesive. A transparent backing element is adhered to the sheeting by the adhesive, and it extends in a plane generally above the formations to leave the formations in the predominant surface area exposed to the atmosphere thereabout.
Light rays entering the the other surface of the sheeting and impinging upon the prisms of the predominant surface area are retroreflected by the interface with the atmosphere, and those impinging upon the formations in the area coated by the adhesive pass through the adhesive and the backing for reflection and refraction from the underlying surface, thereby evidencing its color in daylight.
CA002064484A 1991-04-11 1992-03-31 Retroreflective sheet Expired - Fee Related CA2064484C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US68405791A 1991-04-11 1991-04-11
US07/684,057 1991-04-11

Publications (2)

Publication Number Publication Date
CA2064484A1 true CA2064484A1 (en) 1992-10-12
CA2064484C CA2064484C (en) 1998-08-11

Family

ID=24746533

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002064484A Expired - Fee Related CA2064484C (en) 1991-04-11 1992-03-31 Retroreflective sheet

Country Status (5)

Country Link
JP (1) JPH087281B2 (en)
CA (1) CA2064484C (en)
DE (1) DE4212203A1 (en)
FR (1) FR2675271B1 (en)
GB (1) GB2254826B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5831766A (en) 1993-02-17 1998-11-03 Reflexite Corporation Retroreflective structure
US6029382A (en) * 1993-09-08 2000-02-29 Kochanowski; George E. Reflective sign
US5654825A (en) * 1995-05-15 1997-08-05 Milton; Richard M. Line obstruction marker ball with enhanced daytime and nighttime visibility
US5784197A (en) * 1996-04-01 1998-07-21 Minnesota Mining And Manufacturing Company Ultra-flexible retroreflective sheeting with coated back surface
US5910858A (en) * 1996-04-01 1999-06-08 Minnesota Mining And Manufacturing Company Retroreflective sheeting with coated back surface
US5882796A (en) * 1996-04-01 1999-03-16 Minnesota Mining And Manufacturing Company Bonded structured retroreflective sheeting
US5754338A (en) * 1996-04-01 1998-05-19 Minnesota Mining And Manufacturing Company Structured retroreflective sheeting having a rivet-like connection
US5805338A (en) * 1996-04-10 1998-09-08 Minnesota Minning And Manufacturing Company Pillowed flexible cube-corner sheeting and methods of manufacture
US5940212A (en) * 1997-10-30 1999-08-17 3M Innovative Properties Company Cube corner article with altered inactive areas and method of making same
US6280822B1 (en) * 1999-01-11 2001-08-28 3M Innovative Properties Company Cube corner cavity based retroeflectors with transparent fill material
WO2010120845A2 (en) 2009-04-15 2010-10-21 3M Innovative Properties Company Backlight and display system incorporating same
US8964146B2 (en) 2009-04-15 2015-02-24 3M Innovative Properties Company Optical film for preventing optical coupling
TWI605276B (en) 2009-04-15 2017-11-11 ３Ｍ新設資產公司 Optical construction and display system incorporating same
MX341957B (en) 2010-04-15 2016-09-08 3M Innovative Properties Co Retroreflective articles including optically active areas and optically inactive areas.
EP2558289B1 (en) 2010-04-15 2018-12-26 3M Innovative Properties Company Retroreflective articles including optically active areas and optically inactive areas
JP6046605B2 (en) 2010-04-15 2016-12-21 スリーエム イノベイティブ プロパティズ カンパニー Method for forming a retroreflective article
US8783880B2 (en) * 2011-11-01 2014-07-22 Avery Dennison Corporation Rulable multi-directional prism cluster retroreflective sheeting
JP6382862B2 (en) * 2016-01-15 2018-08-29 スリーエム イノベイティブ プロパティズ カンパニー Retroreflective article and manufacturing method thereof
JP2019078910A (en) * 2017-10-25 2019-05-23 日本カーバイド工業株式会社 Retroreflection sheet
US11927779B2 (en) 2018-03-27 2024-03-12 Nippon Carbide Industries Co., Inc. Method for manufacturing retroreflective sheet and retroreflective sheet

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1211027A (en) * 1966-11-14 1970-11-04 Minnesota Mining & Mfg Reflector structures and die for forming reflector structures
CA1063570A (en) * 1967-03-24 1979-10-02 Amerace Corporation Light reflector structure
US4025159A (en) * 1976-02-17 1977-05-24 Minnesota Mining And Manufacturing Company Cellular retroreflective sheeting
US4349598A (en) * 1976-12-01 1982-09-14 Minnesota Mining And Manufacturing Company High incidence angle retroreflective material
US4145112A (en) * 1977-07-14 1979-03-20 Minnesota Mining And Manufacturing Company Low-profile raised retroreflective sheeting
US4555161A (en) * 1984-02-16 1985-11-26 Reflexite Corporation Encapsulated retroreflective material and method of making same
US4801193A (en) * 1988-03-04 1989-01-31 Reflexite Corporation Retroreflective sheet material and method of making same
US4952023A (en) * 1988-03-18 1990-08-28 Minnesota Mining And Manufacturing Company Internally illuminated retroreflective sign
US4895428A (en) * 1988-07-26 1990-01-23 Minnesota Mining And Manufacturing Company High efficiency retroreflective material
CA2014254C (en) * 1989-05-23 2001-07-24 Howard R. Tolliver Flexible, substrate-insular retroreflective sheeting
US5171624A (en) * 1990-06-01 1992-12-15 Reflexite Corporation Retroreflective microprismatic material and method of making same

Also Published As

Publication number Publication date
JPH087281B2 (en) 1996-01-29
CA2064484C (en) 1998-08-11
FR2675271B1 (en) 1995-01-13
JPH05107406A (en) 1993-04-30
GB9208092D0 (en) 1992-05-27
FR2675271A1 (en) 1992-10-16
DE4212203A1 (en) 1992-10-22
GB2254826A (en) 1992-10-21
GB2254826B (en) 1994-09-07

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