CA2156266C - Retroreflective structure - Google Patents
Retroreflective structure Download PDFInfo
- Publication number
- CA2156266C CA2156266C CA002156266A CA2156266A CA2156266C CA 2156266 C CA2156266 C CA 2156266C CA 002156266 A CA002156266 A CA 002156266A CA 2156266 A CA2156266 A CA 2156266A CA 2156266 C CA2156266 C CA 2156266C
- Authority
- CA
- Canada
- Prior art keywords
- prisms
- substrate
- transparent
- free
- standing
- 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.)
- Expired - Fee Related
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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
-
- 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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1084—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing of continuous or running length bonded web
- Y10T156/1087—Continuous longitudinal slitting
-
- 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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1089—Methods of surface bonding and/or assembly therefor of discrete laminae to single face of additional lamina
Abstract
A retroreflective structure is described in which an easy of free-standing retroreflective prisms is formed on a suitable substrate for application of the structure to pre-existing structure formed of compatible fabrics, such as tarpaulins.
Description
R~TRO~ CTIVE STRUCTURE
gackyround of the Invention Retroreflective materiaie are commonly employed for safety and decorative purposes. One type of retroreflective material is formed of molded members having very small prisms or cube-corner formations. (See, for example, U.S. Patent 3,810,804 and French Patent 2,662,268.) It is often desirable to apply these materials to pre-existing structures; in which case, the retroreflective material may not be compatible with the material of the pre-existing structure or the method of application may be destructive of the retroreflective properties.
A need exists, therefore, for a retroreflective system and process in which the retroreflective material may be fabricated to facilitate permanent transfer to existing structures of different material without damaging the retroreflective material.
Surnmaryr of the Invention A method and apparatus for forming retroreflective material on a substrate is described in which a release coating is formed on a base material and an array o~ solid light transparent prisms are formed on the coating by casting the prism array in a plastic oligomer which is adhered to the coating, The prisms are then made reflective by forming a metal layer on the prisms. An adhe$ive is then applied to the reflective metal layer. A substrate is then applied to the adhesive and the base material is removed at the release coating, leaving an exposed array of Free-standing prisms, i.e., prisms with a reflective metal backin~_g affixed to the substrate.
A ~9E~JDED SNEET
The substrate i.s preferably formed of the same material a:~ the str~.~cture upon which the retroreflective material i.:~ to be sc_~cured or is compatible with such structure. For example, the substrate may comprise a sheet of synthetic resin, such as polyvinylchloride (PVC) , pol~ramide, pc~>l.ypropyl.ene, polycarbonate, or fabrics such as polyester, nylon, or the like, coated with a suitable res:u~ .
Preferably, the substrate with the exposed prism layer may then be ccv;rered with a transparent protective layer on the exposed. side and the substrate may then be bonded by various well-known tec:~zniques to a pre-existing structure of the sar::e or similar material as the substrate.
Brief Description of_t,he -Drawings Figures l1a-1F crrw process f Low schematic cross-sectional views showing the main steps in the fabrication of the retr~oreflecti;r~s material of the invention on a substrate.
Figure 2 is a ~rc;rlematic cro:~s-sec~vion showing further modification to the Figs. la-if embodiment.
Figure 3 is a ~~ckoematic perspective showing a tape formed in accordance with the invention.
Figure 4 _i_s a ~.ect:ion showing an alternate tape embodiment of the invention.
Figure 5 is a clet~:~iled sect:'~onal ~~~iew showing the prism orientat~.on.
~'TIUS94/01681 -3_ 2156266 Detailed Description of the Invention The invention will now be described in detail in connection with the drawings. Referring to Figs. la-lf, a preferred embodiment will be described in which the substrate comprises tarpaulin material. This is a . particularly appropriate example, since a need exists for a simple and inexpensive method of attaching retroreflective material to truck tarpaulins for safety reasons.
As shown in Figure 1A, the starting structure consists of base sheet 10 of material, such as a polyester sheet with an acrylic print treatment on one side (sold by DuPont under the name J Film). A release coating 12 formed of a polyester solvent borne tie cast is applied to the treated side of a 1-4 mils thick sheet 10.
Next, as shown in Figure 1B, an array of mircoprisms 14, about 2.8 mils high, are formed on the release coating by casting the present array onto an epoxy or urethane oligomer and adhering it to the coating.
Preferably, the prisms are of the type formed of cube corners in which the 3 faces intersect at 90° angles and in which the optical and prism axis are coincident, although non-perfect cube corner prisms to achieve special optical effects are within the contemplation of this invention.
The prisms 14 are made reflective by coating the exposed prisms surface with a metal layer 16, such as aluminum, gold or silver of about 500-800 A (Figure 1C).
The structure of Figure 1C is inverted and an adhesive, such as a one component moisture curing reactive poly-urethane adhesive 18 (sold by MACE Corp.) is applied to the metallized prism side in a continuous stripe format of about 50 mm stripe length (Figure 1D).
The substrate a:0, shown here as a tarpaulin material formed of a polyester cloth 22 encapsulated by a plastic material 24, is then laminated to the adhesive 18 (Figure 1E) and the base sheep :LO i.s str=~~pped away (1 figure 1F) .
This :leaves stripes of an array o~ exposed (free) retroreflective pri~cms 14 adhered to the substrate 20 by adhesive 18 (Figure L1'?. Fight rays E incident upon the face of the prism 19 are retroreflected back by surface 16.
The resultant s.tiucture shown in L~'igure 1F may be further processed, as shown in Figure 2, by coating the free prism side with an adhesive 30 and lamiruating a clear protective sheet 32 of material, such as polyvinyl, to the str;zcture. 'fhf: structure shown in Figure 2 may then be slit into strips to form tapes, as shown in Figure 3.
Alternately, as :~rnown in Figure 4, the free prism side shown in Figure 1F may be coated with a material 36 adapted to form a go~_>d bond with both t:he substrate 20 and the free prisms 14.
For example, if tale substrate :is formed of tarpaulin with an acrylic lacquer coating, then an elastomeric urethane coating wou:Ld be a good choice for material 36.
Other substrate materials may corlprise fabric reinforced and embossed vinyl, coated vinyl, urethanes, polypropyle::les and the like.
As shown in Figure 5, an important feature of the present inz~~~ntion is that the prisms 7.4, because they are relatively Free to mc;vre:, become somewhat oriented by the shape of the substrate material 20, which improves the retroreflec:eted light c:li.stributi.on.
gackyround of the Invention Retroreflective materiaie are commonly employed for safety and decorative purposes. One type of retroreflective material is formed of molded members having very small prisms or cube-corner formations. (See, for example, U.S. Patent 3,810,804 and French Patent 2,662,268.) It is often desirable to apply these materials to pre-existing structures; in which case, the retroreflective material may not be compatible with the material of the pre-existing structure or the method of application may be destructive of the retroreflective properties.
A need exists, therefore, for a retroreflective system and process in which the retroreflective material may be fabricated to facilitate permanent transfer to existing structures of different material without damaging the retroreflective material.
Surnmaryr of the Invention A method and apparatus for forming retroreflective material on a substrate is described in which a release coating is formed on a base material and an array o~ solid light transparent prisms are formed on the coating by casting the prism array in a plastic oligomer which is adhered to the coating, The prisms are then made reflective by forming a metal layer on the prisms. An adhe$ive is then applied to the reflective metal layer. A substrate is then applied to the adhesive and the base material is removed at the release coating, leaving an exposed array of Free-standing prisms, i.e., prisms with a reflective metal backin~_g affixed to the substrate.
A ~9E~JDED SNEET
The substrate i.s preferably formed of the same material a:~ the str~.~cture upon which the retroreflective material i.:~ to be sc_~cured or is compatible with such structure. For example, the substrate may comprise a sheet of synthetic resin, such as polyvinylchloride (PVC) , pol~ramide, pc~>l.ypropyl.ene, polycarbonate, or fabrics such as polyester, nylon, or the like, coated with a suitable res:u~ .
Preferably, the substrate with the exposed prism layer may then be ccv;rered with a transparent protective layer on the exposed. side and the substrate may then be bonded by various well-known tec:~zniques to a pre-existing structure of the sar::e or similar material as the substrate.
Brief Description of_t,he -Drawings Figures l1a-1F crrw process f Low schematic cross-sectional views showing the main steps in the fabrication of the retr~oreflecti;r~s material of the invention on a substrate.
Figure 2 is a ~rc;rlematic cro:~s-sec~vion showing further modification to the Figs. la-if embodiment.
Figure 3 is a ~~ckoematic perspective showing a tape formed in accordance with the invention.
Figure 4 _i_s a ~.ect:ion showing an alternate tape embodiment of the invention.
Figure 5 is a clet~:~iled sect:'~onal ~~~iew showing the prism orientat~.on.
~'TIUS94/01681 -3_ 2156266 Detailed Description of the Invention The invention will now be described in detail in connection with the drawings. Referring to Figs. la-lf, a preferred embodiment will be described in which the substrate comprises tarpaulin material. This is a . particularly appropriate example, since a need exists for a simple and inexpensive method of attaching retroreflective material to truck tarpaulins for safety reasons.
As shown in Figure 1A, the starting structure consists of base sheet 10 of material, such as a polyester sheet with an acrylic print treatment on one side (sold by DuPont under the name J Film). A release coating 12 formed of a polyester solvent borne tie cast is applied to the treated side of a 1-4 mils thick sheet 10.
Next, as shown in Figure 1B, an array of mircoprisms 14, about 2.8 mils high, are formed on the release coating by casting the present array onto an epoxy or urethane oligomer and adhering it to the coating.
Preferably, the prisms are of the type formed of cube corners in which the 3 faces intersect at 90° angles and in which the optical and prism axis are coincident, although non-perfect cube corner prisms to achieve special optical effects are within the contemplation of this invention.
The prisms 14 are made reflective by coating the exposed prisms surface with a metal layer 16, such as aluminum, gold or silver of about 500-800 A (Figure 1C).
The structure of Figure 1C is inverted and an adhesive, such as a one component moisture curing reactive poly-urethane adhesive 18 (sold by MACE Corp.) is applied to the metallized prism side in a continuous stripe format of about 50 mm stripe length (Figure 1D).
The substrate a:0, shown here as a tarpaulin material formed of a polyester cloth 22 encapsulated by a plastic material 24, is then laminated to the adhesive 18 (Figure 1E) and the base sheep :LO i.s str=~~pped away (1 figure 1F) .
This :leaves stripes of an array o~ exposed (free) retroreflective pri~cms 14 adhered to the substrate 20 by adhesive 18 (Figure L1'?. Fight rays E incident upon the face of the prism 19 are retroreflected back by surface 16.
The resultant s.tiucture shown in L~'igure 1F may be further processed, as shown in Figure 2, by coating the free prism side with an adhesive 30 and lamiruating a clear protective sheet 32 of material, such as polyvinyl, to the str;zcture. 'fhf: structure shown in Figure 2 may then be slit into strips to form tapes, as shown in Figure 3.
Alternately, as :~rnown in Figure 4, the free prism side shown in Figure 1F may be coated with a material 36 adapted to form a go~_>d bond with both t:he substrate 20 and the free prisms 14.
For example, if tale substrate :is formed of tarpaulin with an acrylic lacquer coating, then an elastomeric urethane coating wou:Ld be a good choice for material 36.
Other substrate materials may corlprise fabric reinforced and embossed vinyl, coated vinyl, urethanes, polypropyle::les and the like.
As shown in Figure 5, an important feature of the present inz~~~ntion is that the prisms 7.4, because they are relatively Free to mc;vre:, become somewhat oriented by the shape of the substrate material 20, which improves the retroreflec:eted light c:li.stributi.on.
Claims (18)
1. A method for forming a retroreflective structure having free-standing prisms, comprising the steps of:
a) forming an array of transparent prisms having a facet side and a window side on a sheet of base material on the window side of said prisms;
b) forming a reflective layer on the facet side of said prisms;
c) adhering a substrate to the reflective layer on the facet side of the prisms; and d) removing the sheet of base material leaving the window side of the array of the transparent prisms formed on the substrate exposed, thereby forming the retroreflective structure having free-standing prisms.
a) forming an array of transparent prisms having a facet side and a window side on a sheet of base material on the window side of said prisms;
b) forming a reflective layer on the facet side of said prisms;
c) adhering a substrate to the reflective layer on the facet side of the prisms; and d) removing the sheet of base material leaving the window side of the array of the transparent prisms formed on the substrate exposed, thereby forming the retroreflective structure having free-standing prisms.
2. The method of Claim 1 wherein the method further includes the step of applying a light-transparent protective sheet on the window side of the array of the transparent free-standing prisms.
3. The method of Claim 2 wherein the light-transparent protective sheet is adhered to the array of prisms by an adhesive.
4. The method of Claim 1 wherein the transparent prisms are cube-corner prisms.
5. The method of Claim 1 wherein the substrate is a tarpaulin.
CLAIMS,
CLAIMS,
6. The method of claim 1 wherein the substrate is a fabric reinforced plastic.
7. The method of claim 2 wherein the protective sheet includes a thermoplastic.
8. The method of claim 7 wherein the thermoplastic includes a polyvinyl chloride.
9. The method of claim 2 wherein the protective sheet includes an elastomeric.
10. The method of claim 1 wherein the formed retroreflective structure is formed into a tape.
11. A retroreflective structure having free-standing transparent prisms comprising:
a) a substrate;
b) a layer of free-standing transparent prisms having a facet side and window side formed on said substrate, wherein the facet side of the prisms adheres to the substrate and the window side is exposed; and c) a reflective layer formed on the facet side of the free-standing transparent prisms.
a) a substrate;
b) a layer of free-standing transparent prisms having a facet side and window side formed on said substrate, wherein the facet side of the prisms adheres to the substrate and the window side is exposed; and c) a reflective layer formed on the facet side of the free-standing transparent prisms.
12. The structure of claim 11 wherein the retroreflective structure further includes a fabric reinforced with plastic attached to the facet side of the prisms.
13. The structure of claim 11 wherein the retroreflective structure further includes a tarpaulin attached to the facet side of the prisms.
14. The structure of claim 11 wherein the structure is formed into a tape.
15. the structure of claim 11 wherein the prisms are bonded to the substrate with an adhesive.
16. The structure of claim 11 wherein the reflective layer includes a metal.
17. The structure of claim 16 wherein the metal is selected from the group consisting of aluminum, gold and silver.
18. The structure of claim 11 further comprising a light-transparent protective sheet on the window side of the layer of free-standing transparent prisms.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1876693A | 1993-02-17 | 1993-02-17 | |
| US08/018,766 | 1993-02-17 | ||
| US08/088,252 US5637173A (en) | 1993-02-17 | 1993-07-07 | Method for forming a retroreflective structure having free-standing prisms |
| US08/088,252 | 1993-07-07 | ||
| PCT/US1994/001681 WO1994019711A1 (en) | 1993-02-17 | 1994-02-15 | Retroreflective structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2156266A1 CA2156266A1 (en) | 1994-09-01 |
| CA2156266C true CA2156266C (en) | 2004-05-25 |
Family
ID=26691478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002156266A Expired - Fee Related CA2156266C (en) | 1993-02-17 | 1994-02-15 | Retroreflective structure |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5637173A (en) |
| EP (1) | EP0690995B1 (en) |
| JP (1) | JP3701967B2 (en) |
| AU (1) | AU6241594A (en) |
| CA (1) | CA2156266C (en) |
| DE (1) | DE69413677T2 (en) |
| WO (1) | WO1994019711A1 (en) |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5831766A (en) * | 1993-02-17 | 1998-11-03 | Reflexite Corporation | Retroreflective structure |
| US5549962A (en) * | 1993-06-30 | 1996-08-27 | Minnesota Mining And Manufacturing Company | Precisely shaped particles and method of making the same |
| WO1995003558A1 (en) * | 1993-07-19 | 1995-02-02 | Reflexite Corporation | Retroreflective structure |
| US5691846A (en) * | 1993-10-20 | 1997-11-25 | Minnesota Mining And Manufacturing Company | Ultra-flexible retroreflective cube corner composite sheetings and methods of manufacture |
| US5450235A (en) | 1993-10-20 | 1995-09-12 | Minnesota Mining And Manufacturing Company | Flexible cube-corner retroreflective sheeting |
| BR9507585A (en) * | 1994-05-02 | 1997-09-23 | Minnesota Mining & Mfg | Process for producing an oven and a retro-reflective fabric material and retro-reflective material |
| JPH11500171A (en) * | 1995-02-16 | 1999-01-06 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | Article comprising a pressure-sensitive adhesive having improved adhesion to plasticized polyvinyl chloride |
| CA2236603C (en) * | 1995-11-02 | 2005-12-27 | Minnesota Mining And Manufacturing Company | Microstructured articles with backing and methods of manufacture |
| US5706132A (en) * | 1996-01-19 | 1998-01-06 | Minnesota Mining And Manufacturing Company | Dual orientation retroreflective sheeting |
| US5805338A (en) * | 1996-04-10 | 1998-09-08 | Minnesota Minning And Manufacturing Company | Pillowed flexible cube-corner sheeting and methods of manufacture |
| US6036322A (en) * | 1997-12-01 | 2000-03-14 | Reflexite Corporation | Multi-orientation retroreflective structure |
| JP4326149B2 (en) | 1997-12-16 | 2009-09-02 | リフレキサイト・コーポレーション | Method for providing adhesive-coated substrate |
| US6481857B2 (en) | 1997-12-16 | 2002-11-19 | Reflexite Corporation | Perforated retroreflective film |
| US6398287B1 (en) | 1998-02-20 | 2002-06-04 | Reflexite Corporation | Retroreflective reinforcement webbing applied to an outer side of a tarpaulin |
| US20050185279A1 (en) * | 1999-01-21 | 2005-08-25 | Reflexite Corporation | Durable, open-faced retroreflective prismatic construction |
| US6592967B2 (en) | 2001-02-14 | 2003-07-15 | Avery Dennison Corporation | Microprism reflective sheeting with improved retention of reflectivity |
| US20040146677A1 (en) * | 2003-01-24 | 2004-07-29 | 3M Innovative Properties Company | Flexible reflective sleeve |
| US6886949B2 (en) * | 2003-02-19 | 2005-05-03 | Ykk Corporation Of America | Light reflective films |
| US7195360B2 (en) * | 2004-12-28 | 2007-03-27 | 3M Innovative Properties Company | Prismatic retroreflective article and method |
| KR20130008643A (en) * | 2004-12-28 | 2013-01-22 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Prismatic retroreflective article with fluorine- or silicon-containing prisms |
| US20070237578A1 (en) * | 2006-03-31 | 2007-10-11 | 3M Innovative Properties Company | Flexible sleeve |
| US7374297B2 (en) * | 2006-03-31 | 2008-05-20 | Reflexite Corporation | Conformable retroreflective film structure |
| US20080176972A1 (en) * | 2007-01-19 | 2008-07-24 | David Hews | Radiation cured elastomeric urethane acrylate films and the process for making same |
| US7547105B2 (en) * | 2007-07-16 | 2009-06-16 | 3M Innovative Properties Company | Prismatic retroreflective article with cross-linked image layer and method of making same |
| KR100851680B1 (en) * | 2007-09-15 | 2008-08-13 | (주)리플로맥스 | That tensile strength improves cube-corner type self-reflection sheet |
| DE102007045412A1 (en) | 2007-09-21 | 2009-04-02 | Erich Utsch Ag | Illuminated sign arrangement for motor vehicle, has laminar expanded retro-reflecting layer arranged behind sign plate, where retro-reflecting layer and illuminating device are combined mechanically to illuminating module |
| CN102203642A (en) | 2008-10-22 | 2011-09-28 | 3M创新有限公司 | Retroreflective sheeting |
| KR101896935B1 (en) * | 2011-12-22 | 2018-09-12 | 엘지이노텍 주식회사 | Retro-reflection structure for improving luminance and durability and process method |
| CN103513310A (en) * | 2013-10-28 | 2014-01-15 | 福建省晋江市夜光达反光材料有限公司 | Process for producing microprism reflective crystal lattice strip and microprism reflective crystal lattice strip |
| CN103963382B (en) * | 2014-04-23 | 2017-01-04 | 福建夜光达科技股份有限公司 | A kind of PET glistening bead sheet and manufacture method thereof |
| CN109322004A (en) * | 2018-10-08 | 2019-02-12 | 福建夜光达科技股份有限公司 | A kind of microprism monomer fully-jewelled Reflect light line and preparation method thereof |
Family Cites Families (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2380447A (en) * | 1945-07-31 | Optical reflecting material | ||
| SE365163B (en) * | 1969-01-21 | 1974-03-18 | Minnesota Mining & Mfg | |
| US3689346A (en) * | 1970-09-29 | 1972-09-05 | Rowland Dev Corp | Method for producing retroreflective material |
| US3684348A (en) * | 1970-09-29 | 1972-08-15 | Rowland Dev Corp | Retroreflective material |
| US3810804A (en) * | 1970-09-29 | 1974-05-14 | Rowland Dev Corp | Method of making retroreflective material |
| US3935359A (en) * | 1972-06-23 | 1976-01-27 | Rowland Development Corporation | Retroreflective sheeting and method and apparatus for producing same |
| US3811983A (en) * | 1972-06-23 | 1974-05-21 | Rowland Dev Corp | Method for producing retroreflective sheeting |
| US3830682A (en) * | 1972-11-06 | 1974-08-20 | Rowland Dev Corp | Retroreflecting signs and the like with novel day-night coloration |
| ZA744273B (en) * | 1974-07-02 | 1975-10-29 | N Anderson | Retro-reflective materials |
| US3975083A (en) * | 1974-07-24 | 1976-08-17 | Reflexite Corporation | Wide angle retroreflector assembly and method of making same |
| US4075049A (en) * | 1976-09-01 | 1978-02-21 | Minnesota Mining And Manufacturing Company | Method of preparing retroreflective sheeting |
| US4349598A (en) * | 1976-12-01 | 1982-09-14 | Minnesota Mining And Manufacturing Company | High incidence angle retroreflective material |
| US4202600A (en) * | 1978-04-24 | 1980-05-13 | Avery International Corporation | Diced retroreflective sheeting |
| US4243618A (en) * | 1978-10-23 | 1981-01-06 | Avery International Corporation | Method for forming retroreflective sheeting |
| US4244683A (en) * | 1979-09-20 | 1981-01-13 | Reflexite Corporation | Apparatus for compression molding of retroreflective sheeting |
| US4721649A (en) * | 1985-05-08 | 1988-01-26 | Minnesota Mining And Manufacturing Company | Retroreflective sheeting |
| US4801193A (en) * | 1988-03-04 | 1989-01-31 | Reflexite Corporation | Retroreflective sheet material and method of making same |
| US5223312A (en) * | 1990-01-05 | 1993-06-29 | Langille John D | Multiple retroreflective striping method and structure |
| US5264063A (en) * | 1990-05-16 | 1993-11-23 | Reflexite Corporation | Method for making flexible retroreflective sheet material |
| US5171624A (en) * | 1990-06-01 | 1992-12-15 | Reflexite Corporation | Retroreflective microprismatic material and method of making same |
| US5202168A (en) * | 1990-09-18 | 1993-04-13 | Northrop Corporation | Precision retro-reflective target tape |
| US5117304A (en) * | 1990-09-21 | 1992-05-26 | Minnesota Mining And Manufacturing Company | Retroreflective article |
| US5084782A (en) * | 1990-12-20 | 1992-01-28 | Eastman Kodak Company | Decorative tape |
| US5050924A (en) * | 1991-01-30 | 1991-09-24 | Hansen George G | Expandable tarpaulin assembly |
| US5207852A (en) * | 1991-02-06 | 1993-05-04 | Minnesota Mining And Manufacturing Company | Method for making permeable retroreflective sheeting |
| GB2255313B (en) * | 1991-04-09 | 1995-03-01 | Swintex | Retro-reflective assembly |
| DK167938B1 (en) * | 1991-12-04 | 1994-01-03 | Ulrich Oppenhejm | TREATMENT PROVIDED WITH A DECORATION OF REFLECTIVE MATERIAL AND PROCEDURES FOR PRODUCING THEREOF |
| WO1995003558A1 (en) * | 1993-07-19 | 1995-02-02 | Reflexite Corporation | Retroreflective structure |
-
1993
- 1993-07-07 US US08/088,252 patent/US5637173A/en not_active Expired - Lifetime
-
1994
- 1994-02-15 CA CA002156266A patent/CA2156266C/en not_active Expired - Fee Related
- 1994-02-15 AU AU62415/94A patent/AU6241594A/en not_active Abandoned
- 1994-02-15 DE DE69413677T patent/DE69413677T2/en not_active Expired - Fee Related
- 1994-02-15 WO PCT/US1994/001681 patent/WO1994019711A1/en active IP Right Grant
- 1994-02-15 JP JP51911194A patent/JP3701967B2/en not_active Expired - Lifetime
- 1994-02-15 EP EP94909655A patent/EP0690995B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2156266A1 (en) | 1994-09-01 |
| US5637173A (en) | 1997-06-10 |
| AU6241594A (en) | 1994-09-14 |
| JPH08507161A (en) | 1996-07-30 |
| WO1994019711A1 (en) | 1994-09-01 |
| DE69413677D1 (en) | 1998-11-05 |
| EP0690995A1 (en) | 1996-01-10 |
| JP3701967B2 (en) | 2005-10-05 |
| EP0690995B1 (en) | 1998-09-30 |
| DE69413677T2 (en) | 1999-06-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2156266C (en) | Retroreflective structure | |
| US5831766A (en) | Retroreflective structure | |
| US4075049A (en) | Method of preparing retroreflective sheeting | |
| US7364314B2 (en) | Optical structures | |
| WO1994019711B1 (en) | Retroreflective structure | |
| CA2040537C (en) | Colored retroreflective sheeting and method for making same | |
| US5491586A (en) | Elastomeric retroreflective structure | |
| JP3590062B2 (en) | Super-flexible retroreflective cube corner composite sheet material and method of manufacturing the same | |
| US5780140A (en) | Retroreflective microprismatic material with top face curvature and method of making same | |
| JP4618895B2 (en) | Open-surface retroreflective prism structure with excellent durability | |
| US20050185279A1 (en) | Durable, open-faced retroreflective prismatic construction | |
| KR19990022404A (en) | Retro-reflective cube corner article with trapezoid base triangles | |
| WO1996035970A1 (en) | Encapsulated lens retroreflective sheeting having thermoplastic polyurethane bonding layer | |
| GB2254826A (en) | A retroreflective sheet material | |
| EP1057051B1 (en) | Retroreflective reinforcement webbing applied to an outer side of a tarpaulin | |
| EP1509790B1 (en) | Retroreflective sheeting with air-backed microstructures | |
| KR101120275B1 (en) | retroreflective elements and articles | |
| AU2004298026B2 (en) | Optical structures | |
| KR950008150Y1 (en) | Decorative adhesive tape | |
| JPH05318668A (en) | Sheet material for preventing sticker | |
| CA2222423A1 (en) | Encased retroreflective elements and method for making |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |