JPS55166770A - Microfilm retrieval unit - Google Patents
Microfilm retrieval unitInfo
- Publication number
- JPS55166770A JPS55166770A JP7520379A JP7520379A JPS55166770A JP S55166770 A JPS55166770 A JP S55166770A JP 7520379 A JP7520379 A JP 7520379A JP 7520379 A JP7520379 A JP 7520379A JP S55166770 A JPS55166770 A JP S55166770A
- Authority
- JP
- Japan
- Prior art keywords
- frames
- marks
- count
- mark
- microfilm
- 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.)
- Granted
Links
Landscapes
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
PURPOSE: To increase items of classification by providing two lines of count marks to frames of a microfilm.
CONSTITUTION: Frames 4, 51, 52...56, and 6 of a microfilm are provided with the 1st count marks 11 and the 2nd count marks 12. Respective marks 11 and 12 are selectively provided according to information in a series of frames. Head frame 51 of the series of frames 51W56 is provided with the 1st count mark 11 and 2nd count mark 12, and intermediate frames are given either of the 1st or 2nd mark. Consequently, when the number of marks is denoted as N, items can be classified as many as 2N-1 and items of classification can be doubled without increasing mark lines.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7520379A JPS55166770A (en) | 1979-06-15 | 1979-06-15 | Microfilm retrieval unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7520379A JPS55166770A (en) | 1979-06-15 | 1979-06-15 | Microfilm retrieval unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55166770A true JPS55166770A (en) | 1980-12-26 |
JPS6244670B2 JPS6244670B2 (en) | 1987-09-22 |
Family
ID=13569395
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7520379A Granted JPS55166770A (en) | 1979-06-15 | 1979-06-15 | Microfilm retrieval unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55166770A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6247631A (en) * | 1985-08-27 | 1987-03-02 | Minolta Camera Co Ltd | Retrieving device for microfilm |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4946938A (en) * | 1972-09-12 | 1974-05-07 |
-
1979
- 1979-06-15 JP JP7520379A patent/JPS55166770A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4946938A (en) * | 1972-09-12 | 1974-05-07 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6247631A (en) * | 1985-08-27 | 1987-03-02 | Minolta Camera Co Ltd | Retrieving device for microfilm |
Also Published As
Publication number | Publication date |
---|---|
JPS6244670B2 (en) | 1987-09-22 |
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