JPH02144197U - - Google Patents

Info

Publication number

JPH02144197U

JPH02144197U JP5080289U JP5080289U JPH02144197U JP H02144197 U JPH02144197 U JP H02144197U JP 5080289 U JP5080289 U JP 5080289U JP 5080289 U JP5080289 U JP 5080289U JP H02144197 U JPH02144197 U JP H02144197U

Authority

JP

Japan

Prior art keywords

filter

outside air

information recording

optical information

dust removal

Prior art date

1989-04-28

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

• Espacenet
• Global Dossier
• Discuss

• 239000000428 dust Substances 0.000 claims description 8
• 230000003287 optical effect Effects 0.000 claims description 7
• 239000000853 adhesive Substances 0.000 claims 1
• 230000001070 adhesive effect Effects 0.000 claims 1
• 238000001816 cooling Methods 0.000 claims 1
• 238000004804 winding Methods 0.000 description 1