JPH0736113A - Microfilm - Google Patents

Abstract

PURPOSE:To accurately detect an address even in the case of feeding film in a reverse direction and to enhance the efficiency of retrieval by reading an address changing mark for reverse feeding showing the address of a frame just before the address changing mark in adjacent to an address changing mark at the time of reverse feeding. CONSTITUTION:A bar code 18A is the address changing mark for reverse feeding, and can be read from the reverse direction discriminatively from blips 14 and 14A. The content of the bar code 18A is the address obtained by adding one to the address of the frame 12b just before the middle blip 14A, that is, which continues in the reverse feeding direction. In the case of feeding the microfilm 10B in the reverse direction, the bar code 18A can be read and has the content of (1, 4). A microfilm reader rewrites the content of a counter to (1, 4) being the content of the bar code 18A. When the next blip 14 is read, one is subtracted from the content of the counter so as to obtain (1, 3), which is set as the address of the frame 12B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microfilm in which an address of a frame is obtained by counting search marks attached to each frame and an address change mark for changing the address is added at an appropriate place. It is a thing.

[0002]

2. Description of the Related Art In microfilm, a mark such as a search blip is imprinted, the blip is read by a microfilm reader and counted, and a target frame is searched by using this count value as a frame address. There is. For example, the address of the frame with the 100th blip from the beginning is set to 100.

When a plurality of document groups are imprinted, it is sometimes desired to change the address range for each group. For example, there are three types of blips that are large, medium, and small, in which small blips are classified into page numbers, medium blips are classified into file numbers, and large blips are classified into batch numbers.

FIG. 3 is a plan view showing an example of such a conventional microfilm. In this figure, a large number of frames 12 are imprinted on the microfilm 10 at substantially equal intervals. A small blip 14 is printed under each frame 12, and a middle blip 14A is attached to the first frame of a different group.

Therefore, if each blip 14 is read while feeding the film 10 in the left direction (forward direction) in the figure, the blip 14 is sequentially read in the right direction (forward direction) in the figure. The address is (ab) for middle and small blips.
Shall be decided. At this time, the address (1.
2) If the middle blip 14A comes after (1.3), the address of the top 12 of the middle blip 14A is (2.1)
And every time the small blip 14 is detected (2.
2), (2.3) ... Address changes.

As a method of changing the address, immediately before a certain group, 1 is added from the first address of the group.
It is possible to imprint a barcode (random batch code) showing a small number.

FIG. 4 is a plan view of a microfilm on which such a bar code is imprinted. In the microfilm 10A, a blank area 16 where the frame 12 is not photographed is provided between different groups, and a barcode 18 is printed below the blank area 16.

Therefore, if the blip 14 is read while feeding the film 10A in the forward direction (left direction in the figure), the blip 14 is sequentially read in the right direction (forward direction) in the figure. For example, when it is divided into a group of (1 to 33) and a group of 101 to 200, only the last address (33 in the figure) of the group of (1 to 33) and then the first address 101 to 1 of the next group The subtracted 100 is imprinted on the barcode 18.

On the other hand, for a frame for which shooting has failed, the same frame may be shot again after this failed frame. At this time, the blips will overlap.
In addition, a frame that failed to be shot may be shot at another address. In this way, to prevent duplication of addresses and to indicate the address at which the frame for which shooting failed was retaken,
It is considered to imprint a barcode (error repair code).

By thus providing the marks for changing the addresses of the middle blip 14A and the bar code 18 (hereinafter referred to as address change marks), the films 10 and 10A are fed in the forward direction while the film 14 is being read. With, you can determine that the group has changed or there are frames for which shooting failed. Therefore, the address after the detection can be changed.

[0011]

Problems of the Prior Art Conventional microfilms 10 and 1
At 0A, when the film is fed in the forward direction, the middle blip 14
The address A and the bar code 18 are detected and the subsequent addresses are correctly determined.

However, these cannot be used when the film is fed in the reverse direction. That is, these address change marks are set so that they can be read while feeding the film in the forward direction.
At the time of reverse feeding, in the case of the blip 14A, the address of the frame following the feeding direction is unknown. Also, in the case of the bar code 18, the contents cannot be read.

For this reason, conventionally, it is not possible to retrieve the film at the time of the backward feeding, and it is necessary to forward the entire film and then forward the film again in the forward direction (forward feeding). Therefore, there is a problem that the search efficiency is low.

[0014]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a microfilm capable of correctly detecting an address and increasing the search efficiency even when the film is fed in the reverse direction. And

[0015]

According to the present invention, an object of the present invention is to add a search mark for each frame and detect the address of the frame by counting the number, and an address change for changing the address of the frame. In the microfilm having a mark, a reverse film address change mark indicating the address of the immediately preceding frame is provided adjacent to the address change mark so as to be readable at the time of reverse transfer. .

[0016]

1 is a plan view of a microfilm showing an embodiment of the present invention. In this figure, a small blip 14 and a middle blip 14A are provided below the top 12 of the roll-shaped microfilm 10B. A blank area 16A is provided immediately in front of the top 12A provided with the middle blip 14A, that is, adjacent to the reverse direction, and a barcode 18A is provided below the blank area 16A, that is, on the traveling locus of the blip 14.

This bar code 18A serves as a reverse address change mark in the present invention, and the blip 1
It is possible to read from the opposite direction in distinction from 4, 14A. The content of the barcode 18A is the address obtained by adding 1 to the address of the frame 12B immediately before the middle blip 14A, that is, in the backward direction. For example, in FIG. 1, when the address of the top 12B immediately before the middle blip 14A is set to (1.3) and the address of the top 12A of the middle blip 14 is set to (2.1), the barcode 18A is set to (1.4). It shall indicate the contents.

When the microfilm 10B is set in a microfilm reader (not shown) and fed in the forward direction, the reader (not shown) of the blip 14 is set to the address b indicating the page of the counter each time the blip 14 is read. Add 1 When the blip 14A is detected during this time, the address a indicating the group as if it belongs to another group
Is incremented by 1 to set the address b indicating the page to 1. The contents of the bar code 18A cannot be read and are ignored during this sequential transfer.

When the microfilm 10B is fed in the reverse direction, the bar code 18A can be read. The contents are 1 in the address of the frame 12B immediately after the middle blip 14A.
And has the content of (1.4). The micro film reader displays the contents of the counter with this barcode 1.
Rewrite to (1.4) which is the contents of 8A. When the next blip 14 is read, 1 is subtracted from the contents of the counter to obtain (1.3), which is the address of the frame 12B.

FIG. 2 is a plan view of a microfilm showing another embodiment. This microfilm 10C has a wide blank area 16B as compared with the embodiment of FIG. 1, and a bar code 18B as an address change mark for progressive transfer is provided below this blank area 16B.
And a bar code 1 as an address change mark for reverse sending
8C is installed side by side.

The bar code 18B can be read only during forward transmission and is ignored during reverse transmission. Further, the bar code 18C can be read only in the backward feeding, and is ignored in the forward feeding. The bar code 18B for progressive transmission has exactly the same function as the bar code 18 described with reference to FIG. 4, and is a number (101-1 = 100) obtained by subtracting 1 from the address (for example, 101) of the first frame 12A of the next group. ) Is recorded. Further, the barcode 18C for reverse transmission records the number (33 + 1 = 34) obtained by adding 1 to the address (for example, 33) of the frame 12B immediately before the blank area 16B.

According to this embodiment, the bar code 18 is the address obtained by subtracting 1 from the address (101) of the top frame 12A of the next group in the blank area 16B during the forward transmission.
It is read from B and input to the counter. Therefore, the blip 14B of the top frame 12A is read and the counter 1
The address of this frame 12A is (1
01) can be determined.

At the time of back feeding, the bar code 1 for back feeding
8C is the address of the frame 12B immediately after that (eg 33)
Since the address (34) obtained by adding 1 to is recorded, the content of the counter is rewritten with this content. Then, when the blip 14C of the frame 12B immediately after that is detected, 1 is subtracted from the content of the counter to obtain the address (34-1 = 33). After that, the counter may be decremented by 1 each time the blip 14 is detected.

In the above-mentioned embodiment, the address is changed when the group of the frames 12 is changed, but the back-sending address change mark according to the present invention takes the image of the image which failed to be taken again to another address. It may be an address (error repair code) indicating the address in the case of doing.

It is desirable that the reverse feed address change mark is provided on the traveling locus of the blip 14 and read by a sensor common to the blip 14. However, it goes without saying that the sensor may be provided at the edge opposite to the blip 14 and read by another sensor.

[0026]

As described above, according to the first aspect of the present invention, the reverse feed address change mark for reading at the time of the reverse feed is provided, and at the time of the reverse feed, the address of the frame for the blip to be read next is obtained. Therefore, even if the film is sent back, the frame can be searched, and the search efficiency is greatly improved.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a plan view of another embodiment of the present invention.

FIG. 3 is a plan view showing an example of a conventional microfilm.

FIG. 4 is a plan view showing an example of a conventional microfilm.

[Explanation of symbols]

 10, 10A, 10B, 10C Microfilm 12, 12A, 12B Frames 14, 14A, 14B, 14C Blip 16, 16A, 16B Blank area 18A, 18C Reverse address change mark

Claims (1)

[Claims] 1. A microfilm having a search mark provided for each frame to detect the address of the frame by counting the number and an address change mark for changing the address of the frame. A microfilm characterized by being provided with an address change mark for reverse transfer, which is adjacent to the address change mark and indicates the address of a frame immediately before it, so that it can be read during reverse transfer.