JPS55144201A - Cylindrical reflecting mirror and its production - Google Patents
Cylindrical reflecting mirror and its productionInfo
- Publication number
- JPS55144201A JPS55144201A JP5317979A JP5317979A JPS55144201A JP S55144201 A JPS55144201 A JP S55144201A JP 5317979 A JP5317979 A JP 5317979A JP 5317979 A JP5317979 A JP 5317979A JP S55144201 A JPS55144201 A JP S55144201A
- Authority
- JP
- Japan
- Prior art keywords
- die
- blank
- convex parts
- quadrangular pyramidal
- outside
- 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 let the light of a lamp be effectively reflected by providing a multiplicity of quadrangular pyramidal protrusions in close contact with each other on the inside wall surface of a hollow cylindrical reflecting plate blank with their peak parts being directed to the cylindrical axis direction.
CONSTITUTION: A hollow cylindrical reflecting blank 17 is put between a roll-form outside die 11 provided with quadrangular pyramidal convex parts 12 on the outside circumferential surface of a cylinderical body and a roll-form inside die 14 provided with quadrangular pyramidal concave parts 15 opposing to the convex parts 12 of the outside die 11, with the inside die 14 being brought to the inner side of the blank 17. While the inside die 14 and outside die 11 are being pressure contacted, their shafts 13, 16 are revolved synchronously, by which the quadrangular pyramidal protrusions protruding toward the inner side are made on the inside circumferential surface of the blank 17. The cylindrical reflecting plate 5 thus obtained is put on a cylindrical lamp 3 so that the reflection efficiency of the light reflecting downward is improved. With the reflecting plate 5 which is relatively low in the height of the convex parts 12, it is also possible to use the circular-tube-form rubber which is not provided with convex parts on the inside die.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5317979A JPS55144201A (en) | 1979-04-28 | 1979-04-28 | Cylindrical reflecting mirror and its production |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5317979A JPS55144201A (en) | 1979-04-28 | 1979-04-28 | Cylindrical reflecting mirror and its production |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55144201A true JPS55144201A (en) | 1980-11-11 |
Family
ID=12935632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5317979A Pending JPS55144201A (en) | 1979-04-28 | 1979-04-28 | Cylindrical reflecting mirror and its production |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55144201A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011051018A (en) * | 2010-10-07 | 2011-03-17 | Universal Seikan Kk | Can body |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50115163A (en) * | 1974-02-09 | 1975-09-09 | ||
JPS5370589A (en) * | 1976-12-07 | 1978-06-23 | Iwasaki Electric Co Ltd | Illuminator |
-
1979
- 1979-04-28 JP JP5317979A patent/JPS55144201A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50115163A (en) * | 1974-02-09 | 1975-09-09 | ||
JPS5370589A (en) * | 1976-12-07 | 1978-06-23 | Iwasaki Electric Co Ltd | Illuminator |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011051018A (en) * | 2010-10-07 | 2011-03-17 | Universal Seikan Kk | Can body |
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