JPS5538508A - Production of reflector - Google Patents
Production of reflectorInfo
- Publication number
- JPS5538508A JPS5538508A JP11076078A JP11076078A JPS5538508A JP S5538508 A JPS5538508 A JP S5538508A JP 11076078 A JP11076078 A JP 11076078A JP 11076078 A JP11076078 A JP 11076078A JP S5538508 A JPS5538508 A JP S5538508A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- semi
- faces
- reflector
- spherical
- 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.)
- Pending
Links
Landscapes
- Optical Elements Other Than Lenses (AREA)
Abstract
PURPOSE: To readily obtain the reflector which combines prism system and bead system by parallel disposing a multiplicity of pyramidal protrusions on the inside surface of one mold and fitting beads having reflecting films on the back in the multiple semi-spherical recesses dispersed in the inside surface of the other mold with respect to the reflector which is used for road signals, etc.
CONSTITUTION: Multiple pyramidal protrusions 3 are parallel disposed on the inside surface of the first mold 1 so as to form reflecting surfaces of triangular pyramidal prism form reflectors. The other second mold 2 which mates with this mold by way of a parting line 4 is made in tray form and a plurality of small-diameter concave semi-spherical faces 7 are so formed in the bottom 6 thereof as to scatter. The semi- spheres 10 having a radius approximately equal to the radius of the abovementioned semi-spherical faces 7 and curved surface bodies 11 forming convex faces having a radius larger than that of concave semi-spherical faces 7 on the opposite side thereof are integrally formed and the beads formed with reflecting films 9 on the concave curved faces thereof are fitted into the concave semi-spherical faces. The abovementioned both molds 1, 2 are mutually mated and the molten resin having been heated is injected through the injection hole formed along the parting line 4 thereof, after which is the resin is cooled to set to eliminate the fear for dislodging of the beads, whereby the reflector is obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11076078A JPS5538508A (en) | 1978-09-11 | 1978-09-11 | Production of reflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11076078A JPS5538508A (en) | 1978-09-11 | 1978-09-11 | Production of reflector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5538508A true JPS5538508A (en) | 1980-03-18 |
Family
ID=14543862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11076078A Pending JPS5538508A (en) | 1978-09-11 | 1978-09-11 | Production of reflector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5538508A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4678695A (en) * | 1985-12-23 | 1987-07-07 | Minnesota Mining And Manufacturing Company | Encapsulated flattop retroreflective sheeting and method for producing the same |
| EP1933178A1 (en) * | 2006-12-12 | 2008-06-18 | Samsung Electronics Co., Ltd. | Optical sheet and method for fabricating the same |
-
1978
- 1978-09-11 JP JP11076078A patent/JPS5538508A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4678695A (en) * | 1985-12-23 | 1987-07-07 | Minnesota Mining And Manufacturing Company | Encapsulated flattop retroreflective sheeting and method for producing the same |
| EP1933178A1 (en) * | 2006-12-12 | 2008-06-18 | Samsung Electronics Co., Ltd. | Optical sheet and method for fabricating the same |
| US8158040B2 (en) | 2006-12-12 | 2012-04-17 | Samsung Electronics Co., Ltd. | Method for fabricating an optical sheet |
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