JPH01109819U - - Google Patents
Info
- Publication number
- JPH01109819U JPH01109819U JP1988004912U JP491288U JPH01109819U JP H01109819 U JPH01109819 U JP H01109819U JP 1988004912 U JP1988004912 U JP 1988004912U JP 491288 U JP491288 U JP 491288U JP H01109819 U JPH01109819 U JP H01109819U
- Authority
- JP
- Japan
- Prior art keywords
- optical disk
- ventilation hole
- spring
- valve body
- ventilation
- 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
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
- Optical Recording Or Reproduction (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988004912U JPH01109819U (en]) | 1988-01-19 | 1988-01-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988004912U JPH01109819U (en]) | 1988-01-19 | 1988-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01109819U true JPH01109819U (en]) | 1989-07-25 |
Family
ID=31207840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988004912U Pending JPH01109819U (en]) | 1988-01-19 | 1988-01-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01109819U (en]) |
-
1988
- 1988-01-19 JP JP1988004912U patent/JPH01109819U/ja active Pending
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