IL41920A - Manufacture of composite reflecting systems - Google Patents
Manufacture of composite reflecting systemsInfo
- Publication number
- IL41920A IL41920A IL41920A IL4192073A IL41920A IL 41920 A IL41920 A IL 41920A IL 41920 A IL41920 A IL 41920A IL 4192073 A IL4192073 A IL 4192073A IL 41920 A IL41920 A IL 41920A
- Authority
- IL
- Israel
- Prior art keywords
- layer
- beads
- heated
- bead
- temperature
- Prior art date
Links
- 239000002131 composite material Substances 0.000 title claims 3
- 238000004519 manufacturing process Methods 0.000 title claims 2
- 239000011324 bead Substances 0.000 claims 26
- 238000000034 method Methods 0.000 claims 19
- 239000010410 layer Substances 0.000 claims 17
- 239000000203 mixture Substances 0.000 claims 8
- 238000004220 aggregation Methods 0.000 claims 4
- 230000002776 aggregation Effects 0.000 claims 4
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 239000011248 coating agent Substances 0.000 claims 2
- 238000000576 coating method Methods 0.000 claims 2
- 239000007788 liquid Substances 0.000 claims 2
- 230000000149 penetrating effect Effects 0.000 claims 2
- 239000011347 resin Substances 0.000 claims 2
- 229920005989 resin Polymers 0.000 claims 2
- 239000002356 single layer Substances 0.000 claims 2
- 229920001228 polyisocyanate Polymers 0.000 claims 1
- 239000005056 polyisocyanate Substances 0.000 claims 1
Landscapes
- Laminated Bodies (AREA)
Claims (19)
1. A method, for producing a composite reflecting system, including preliminarily forming a basic aggregation consisting of a main transparent body having a spherical portion for exposure to impinging light beams, a transparent layer about th entire or selected portions of the surface of said body, and spherical elements arranged about said surface or surface portions positioned in the layer to further focus and reflect in a direction substantially coincident with that of impingement a light beam impinging on said exposed portion, characterized by the formation of said basic aggregation by the steps of forming about said surface or surface portions a layer of a substantially liquid transparent composition hich is substantially non-sticky, is bead receptive at a first lower temperature and which become locally bead retentive when heated to a second higher temperature, of causing small transparent spherical beads, heated to a temperature above said second higher temperature, to impinge on and partially penetrate into said layer, of continuing said impingement on not yet impinged and still bead receptive areas of said layer, until a substantially uninterrupted monolayer or closel adjacent beads is formed on said layer, and of causing said layer to completely set in its bead retentive condition while said impinged and partially penetrating beads cover said layer.
2. The method of claim 1, wherein said layer of composition is capable of maintaining its bead receptive condition at ambient temperature for a time sufficient for the performance of said steps of layer formation and of beads 41920/2 - 12 - completed, and capable of promptly locally becoming bead retentive when and where contacted by a bead heated above
3. The method of claim 2, wherei said composition consists of at least two synthetic compositions capable of promptly cross-linlcing whe heated to said second higher temperature.
4. The method of claim 3, wherein said composition comprises at leas one polyisocyanate resin and at least one polyeste resin having free hydroxy1 groups and capable of promptly forming urethane bonds when heated to said second highe temperature*
5. The method of claim 2, wherein said composition comprises at least one reaction accelerator.
6. The method of claim lr wherein said beads are heated to a temperature comprised in the range 180°C to 250°C inclusive and are then caused to impinge on coated main bodies or spheres maintained at ambient temperature.
7. The method of claim 6, wherein said coated spheres are projected on and into a flowing mass of heated beads.
8. The method of claim 6, wherein the said coated spheres are dropped on and into a travelling bed of heated beads,
9. The method of claim 6, wherein said heated beads are supplied into a vertically elongated environment and carried by a gaseous stream to form a luidized bed of heated beads in said environment, and wherein coated spheres at amtlent temperature are caused to spacedly fall over and through said 41920/2 - 13 -
10. The method of claim 6, wherein said coated spheres are contacted with heated beads the number of which is i excess of that necessary to form uninterrupted monolayers of closely adj cent beads about said coated spheres·
11. A method/ or producing a composite re lecting system, including preliminarily forming a basic aggregation consisting of a main transparent body having a spherical portion for exposure to impinging light beams, a transparent layer about the entire or selected portions of the surface of said body, and spherical elements arranged about said surface or surface portions and positioned in the laye to further focus and re lect in a directio substantially coincident with that of impingement a light beam impinging on said exposed portion, characterized by the formatio of said basic aggregation by the steps of forming about said surface or surface portions a layer of a substantially liquid transparent composition which is substantially non-sticky, is bead receptive at a first lower temperatur and which becomes locally bead retentive when heated to a second higher temperature, of causing small spherical beads, heated to a temperature above said second higher temperature, to impinge on and partially penetrate into said layer, of continuing said impingement on not yet impinged and still bead receptive areas of said layer, until a substantially uninterrupted monolayer of closely adjacent beads is formed on said layer, of causing said layer to completely set in its bead retentive condition whilst said impinged and partially penetrating beads cover said layer, and of subsequently removing said beads from said basic aggregate to provide an article having - 14 -
12. The method of claim 11, wherein an inwardly reflective coating is applied about said article and within said recesses.
13. The method of claim 11, wherein said article is further wetted with a composition in amount less than that necessary to completely fill said recesses, and capable of setting in said recesses to form individual transparent concave-convex lenses in said recesses, preparatory to the manufacture of catoptrically behaving systems.
14. The method of claim 13, wherein inwardly reflective coating is applied about said article and over the outwardly facing concave faces of said lenses.
15. The method of claim 1, wherein said main transparent body has the configuration of a lens having an uncoated convex face and spherical elements on at least a face adjacent to said uncoated one.
16. » The method of claim 15, wherein said transparent body is a biconvex lens and has said spherical elements secured on one only of its convex faces.
17. The method of claim 15, wherein said transparent body has a frusto-conical side face and said spherical elements are secured to said side face.
18. The method claimed in claim 1 substantially as described herein vith reference to Figures 1 to 7, 10, 11 and 13.
19. The method claimed in claim 11 substantially as described with reference to Figures 8 to 10 and 12 of the accompanying drawings* For the Applicant DR. PARTNERS
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2649972A IT1003066B (en) | 1972-07-01 | 1972-07-01 | IMPROVEMENT OF THE PROCESSES FOR THE INDUSTRIAL PRODUCTION OF MULTIPLE CATOPLE FOCUSING REFLECTIVE ELEMENTS AND RELATED PRODUCTS, IN PARTICULAR FOR TRAFFIC SIGNS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL41920A0 IL41920A0 (en) | 1973-05-31 |
| IL41920A true IL41920A (en) | 1976-09-30 |
Family
ID=11219651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL41920A IL41920A (en) | 1972-07-01 | 1973-03-30 | Manufacture of composite reflecting systems |
Country Status (6)
| Country | Link |
|---|---|
| AR (1) | AR198299A1 (en) |
| BR (1) | BR7302002D0 (en) |
| CS (1) | CS178131B2 (en) |
| DD (1) | DD106919A5 (en) |
| IL (1) | IL41920A (en) |
| IT (1) | IT1003066B (en) |
-
1972
- 1972-07-01 IT IT2649972A patent/IT1003066B/en active
-
1973
- 1973-01-23 DD DD16839673A patent/DD106919A5/xx unknown
- 1973-01-25 AR AR24629873A patent/AR198299A1/en active
- 1973-03-21 BR BR200273A patent/BR7302002D0/en unknown
- 1973-03-30 IL IL41920A patent/IL41920A/en unknown
- 1973-06-22 CS CS451073A patent/CS178131B2/cs unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS178131B2 (en) | 1977-08-31 |
| AR198299A1 (en) | 1974-06-14 |
| IL41920A0 (en) | 1973-05-31 |
| IT1003066B (en) | 1976-06-10 |
| BR7302002D0 (en) | 1974-02-28 |
| DD106919A5 (en) | 1974-07-05 |
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