JPS55166770A - Microfilm retrieval unit - Google Patents

Microfilm retrieval unit

Info

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
Application number
JP7520379A
Other languages
Japanese (ja)
Other versions
JPS6244670B2 (en
Inventor
Motofumi Konishi
Yoshio Ando
Kazuo Kashiwagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP7520379A priority Critical patent/JPS55166770A/en
Publication of JPS55166770A publication Critical patent/JPS55166770A/en
Publication of JPS6244670B2 publication Critical patent/JPS6244670B2/ja
Granted legal-status Critical Current

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
JP7520379A 1979-06-15 1979-06-15 Microfilm retrieval unit Granted JPS55166770A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4946938A (en) * 1972-09-12 1974-05-07

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4946938A (en) * 1972-09-12 1974-05-07

Cited By (1)

* Cited by examiner, † Cited by third party
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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