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CA1268016C - Reflective particles and method of making the same - Google Patents

Reflective particles and method of making the same

Info

Publication number
CA1268016C
CA1268016C CA483245A CA483245A CA1268016C CA 1268016 C CA1268016 C CA 1268016C CA 483245 A CA483245 A CA 483245A CA 483245 A CA483245 A CA 483245A CA 1268016 C CA1268016 C CA 1268016C
Authority
CA
Canada
Prior art keywords
granules
granule
indentations
multiplicity
reflective marker
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
Application number
CA483245A
Other languages
French (fr)
Other versions
CA1268016A (en
Inventor
Robert Dejaiffe
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 filed Critical
Application granted granted Critical
Publication of CA1268016A publication Critical patent/CA1268016A/en
Publication of CA1268016C publication Critical patent/CA1268016C/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/35—Toppings or surface dressings; Methods of mixing, impregnating, or spreading them
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/04—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
    • B29C43/06—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts
    • B29C43/08—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts with circular movement, e.g. mounted on rolls, turntables
    • B29C43/085—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts with circular movement, e.g. mounted on rolls, turntables and material fed in a continuous form, e.g. as a band
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00605—Production of reflex reflectors
    • B29D11/00615—Production of reflex reflectors moulded by partially embedding reflective elements, e.g. glass beads, into the surface of a support, e.g. to make prefabricated road markings
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
    • E01F9/506—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users characterised by the road surface marking material, e.g. comprising additives for improving friction or reflectivity; Methods of forming, installing or applying markings in, on or to road surfaces
    • E01F9/524—Reflecting elements specially adapted for incorporation in or application to road surface markings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/126—Reflex reflectors including curved refracting surface
    • G02B5/128—Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix

Landscapes

  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Road Signs Or Road Markings (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Abstract of the Disclosure A reflective marker for highway striping, signs and other surfaces is produced from a multiplicity of thermoplastic or thermosetting granules in the shape of tetrahedrons. A plurality of glass spheres having a diameter in the range of from about 6.0 microns to about 0.125 inches are substantially evenly dispersed throughout each granule with some of the spheres protruding through the outer granule surfaces. To form the granules the glass spheres, the granule material and a suitable pigment are mixed together and then applied to a flexible sheet or a roller containing a multiplicity of tetrahedron-shaped indentations. The mixture is urged into each of the indentations and is then cured. The resulting granules are removed from the indentations and are dropped from a random position onto a freshly painted highway line or other surface such that one of the flat faces on each granule is disposed in a downward direction. As the paint dries and hardens, the granules are firmly held in place on the surface to provide a reflective marker.
CA483245A 1984-09-21 1985-06-05 Reflective particles and method of making the same Expired CA1268016C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US65394384A 1984-09-21 1984-09-21
US653,943 1984-09-21

Publications (2)

Publication Number Publication Date
CA1268016A CA1268016A (en) 1990-04-24
CA1268016C true CA1268016C (en) 1990-04-24

Family

ID=24622896

Family Applications (1)

Application Number Title Priority Date Filing Date
CA483245A Expired CA1268016C (en) 1984-09-21 1985-06-05 Reflective particles and method of making the same

Country Status (8)

Country Link
JP (1) JPS6177803A (en)
AU (1) AU573898B2 (en)
BR (1) BR8503932A (en)
CA (1) CA1268016C (en)
DE (1) DE3524661A1 (en)
FR (1) FR2570726B1 (en)
GB (1) GB2164762B (en)
MX (1) MX170384B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1307971C (en) * 1988-06-09 1992-09-29 Thomas Peter Hedblom Patterned pavement marking
NL8802472A (en) * 1988-10-10 1990-05-01 Homer Hollandse Meet En Regels DOCUMENT INCLUDING RANDOM INFORMATION, CARRIER OF THIS RANDOM INFORMATION AND METHOD AND DEVICE FOR READING THIS RANDOM INFORMATION.
DE4238168A1 (en) * 1992-10-15 1994-04-21 Gerhard Cammann Light reflecting surfaces for road marking
DE9205350U1 (en) * 1992-04-17 1992-06-17 Swarco Vestglas Vestische Strahl- und Reflexglas GmbH, 4350 Recklinghausen Reflective bodies, especially for road markings
DE19521847A1 (en) * 1995-06-16 1996-12-19 Gerhard Cammann Light reflective agglomerates for road markings, reflective structural blocks etc.
US5835271A (en) * 1995-06-29 1998-11-10 Minnesota Mining And Manufacturing Company Encased retroreflective elements and method for making
AUPO430296A0 (en) * 1996-12-20 1997-01-23 Rogers, Barry Heith Marking composition
SE9700064L (en) * 1997-01-10 1998-07-11 Qualisys Ab Method and apparatus for the manufacture of a coated body
EP0925407A1 (en) * 1997-07-16 1999-06-30 Minnesota Mining And Manufacturing Company Pavement marking having raised protuberances and method of making
DE19962953B4 (en) * 1999-12-24 2006-01-26 Bundesdruckerei Gmbh Method for coding thermoplastic products
GB0213727D0 (en) * 2002-06-14 2002-07-24 Prismo Ltd Retroreflective device and method of manufacture thereof
GB2402694B (en) 2003-06-11 2006-03-15 Prismo Ltd Method and apparatus for manufacturing a retroflective device
KR100586406B1 (en) * 2004-06-11 2006-06-08 김현대 Cube corner type retroreflective device manufacturing method and retroreflective device
FR2885363B1 (en) * 2005-05-04 2007-09-28 Appia REFLECTING MATERIAL FOR COVERING CIRCULATION PATHWAY
ATE553164T1 (en) 2007-02-23 2012-04-15 Triflex Beschichtungssysteme Gmbh & Co Kommanditgesellschaft PRIMER AND MARKING COMPOSITIONS
US9207373B2 (en) 2007-04-10 2015-12-08 Stoncor Group, Inc. Methods for fabrication and highway marking usage of agglomerated retroreflective beads
US10308816B2 (en) 2014-05-05 2019-06-04 Potters Industries, Llc Coatings for pelletized thermoplastic pavement marking compositions
CA2956266A1 (en) * 2014-07-25 2016-01-28 Heidelbergcement Ag Texturizing elements for traffic surfaces, use thereof and method for producing traffic surfaces
EP3347319B1 (en) 2015-09-11 2020-10-28 3M Innovative Properties Company Durable retroreflective elements with a blend of beads
EP3585842A1 (en) * 2017-02-23 2020-01-01 Potters Industries, LLC Improved coatings for pelletized thermoplastic pavement marking compositions

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB688310A (en) * 1950-09-02 1953-03-04 R S Clare & Company Ltd Improvements in or relating to road marking means and compositions
FR1211669A (en) * 1957-09-18 1960-03-17 Minnesota Mining & Mfg Granular material that reflects light, especially for road marking
US3036928A (en) * 1959-12-18 1962-05-29 Cataphote Corp Retroreflective composition and method of applying same
US3171827A (en) * 1960-10-31 1965-03-02 Prismo Safety Corp Reflective granules
US3247158A (en) * 1962-02-07 1966-04-19 Standard Oil Co Filled plastisol compositions
US3252376A (en) * 1962-02-16 1966-05-24 Prismo Safety Corp Reflex reflective granule and marking material made thereof
US3254563A (en) * 1963-11-12 1966-06-07 Prismo Safety Corp Retro-reflective particles and reflective markers and compositions containing such particles
US3518221A (en) * 1967-10-30 1970-06-30 Monsanto Co Reinforcing fillers in a matrix of two thermosetting resins
FR1604009A (en) * 1968-08-05 1971-06-28 Reflective element, eg a road marker - stud
FR2082537A5 (en) * 1970-03-19 1971-12-10 Tech Tuiles Briques Centre Tetrahedral ceramic granules - for use in road surfacing concrete etc
FR2101024A1 (en) * 1970-08-07 1972-03-31 France Etat PAVEMENT COATING, ITS MANUFACTURING AND IMPLEMENTATION PROCESS
IT1001490B (en) * 1972-05-24 1976-04-20 Eigenmann Ludwig IMPROVEMENT TO HORIZONTAL ROAD SIGN MATERIALS AND RELATED HIGH VISIBILITY IMPROVED MATERIALS ADHESION AND RESISTANCE TO WEAR
US3859407A (en) * 1972-05-15 1975-01-07 Corning Glass Works Method of manufacturing particles of uniform size and shape
FR2194192A5 (en) * 1972-07-27 1974-02-22 Loing Verreries
US3867178A (en) * 1972-09-05 1975-02-18 Potters Industries Inc Method for coating discrete particles
JPS5131735A (en) * 1974-09-13 1976-03-18 Ookee Kasei Kk
GB1531480A (en) * 1974-12-20 1978-11-08 Bagshaw R Retroreflective elements
US4072403A (en) * 1975-07-16 1978-02-07 Ludwig Eigenmann Retro-reflecting assembly
US4388359A (en) * 1982-04-23 1983-06-14 Minnesota Mining And Manufacturing Company Embossed pavement-marking sheet material

Also Published As

Publication number Publication date
GB2164762A (en) 1986-03-26
GB8515548D0 (en) 1985-07-24
FR2570726B1 (en) 1987-08-21
FR2570726A1 (en) 1986-03-28
DE3524661C2 (en) 1989-07-20
BR8503932A (en) 1986-05-27
GB2164762B (en) 1988-05-18
CA1268016A (en) 1990-04-24
AU4756585A (en) 1986-03-27
AU573898B2 (en) 1988-06-23
MX170384B (en) 1993-08-18
DE3524661A1 (en) 1986-04-03
JPS6177803A (en) 1986-04-21

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Legal Events

Date Code Title Description
MKEX Expiry
MKEX Expiry

Effective date: 20070424

MKEX Expiry

Effective date: 20070424

MKEX Expiry

Effective date: 20070424