JP2999641B2 - Method for producing photographic film and method for producing photographic film patrone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film on which data by magnetic recording is written and a method for manufacturing a photographic film cartridge containing the photographic film.

[0002]

2. Description of the Related Art In recent years, as disclosed in U.S. Pat. Nos. 4,86,0037 and 4,864,332, there has been proposed a photographic film in which information unique to the photographic film is written on a magnetic recording material. The recorded manufacturing information is, for example, information at the time of manufacturing the photographic film regarding the ID code, the lot number, the film sensitivity, the number of photographable frames, and the like of the photographic film. When the user loads the photo film into the camera, the information on the photo film necessary for shooting is read out by the mechanism on the camera side,
It is possible to set a photographing mode or the like based on the information and perform good photographing. Also, when processing photo film at the request of a user at a photo lab, it is necessary to always handle the photo film in a state where the user is associated with the photo film, and information that can be used for the correspondence is also required. Be recorded. Japanese Utility Model Publication No. 3-2905 discloses a photographic film having identification information near a perforation hole at a position where an image is to be taken. Each of the information has evolved into two,
It also suggests magnetic recording binary evolution information and undeveloped barcode information.

A photographic film patrone is composed of a patrone main body and a photographic film housed therein in a light-tight manner. As a typical example, a photographic film patrone containing a 35 mm-wide photographic film is known.
The most widespread 135 type photo film patrone is composed of a patrone body made of a thin sheet metal patrone and two caps, in which a spool around which one end of the photographic film is fixed and wound is housed. . As a method for assembling the photo film patrone, there is a method in which a photographic film is wound around a spool and prepared and wrapped in a patrone main body by working in a dark room, as disclosed in Japanese Patent Publication No. 2-691.

On the other hand, as disclosed in US Pat. Nos. 4,834,306 and 4,846,418, and Japanese Patent Application Laid-Open No. 3-37645 by the present applicant,
2. Description of the Related Art A photographic film patrone having a function of assembling a patrone body with a resin molded product and sending the photographic film out of the patrone body by rotating a spool is known. This photo film patrone is different from the previous ones.In both the unused state and the used state, the leader of the photographic film does not protrude from the patrone body, and not only can the photographic film be stored more light-tight,
There is an advantage that handling before and after use is simplified.

In general, a photographic film stored in a photographic film cartridge as described above is manufactured by the following manufacturing process. First, a band-shaped photographic film sheet material coated with an emulsion on the exposed surface side and cut into a predetermined width is wound around a rotating shaft rotated by a drive motor to form a film roll. In the production line, the film is sent out from the film roll at a constant speed, and perforations are opened at regular intervals by a punch provided on the production line. In the next step, the perforated film is cut by a trimmer into a length of one photographic film cartridge to form an end. At this time, the film feeding speed is several tens times faster than the normal camera film feeding speed in order to improve productivity.

[0006]

When magnetic recording is performed on a photographic film, a magnetic recording material is also provided at a predetermined position before the sheet material is formed into a film roll. However, in the high-speed production process,
It has been very difficult to record magnetic data to exactly match the frame position of the photographic film. In addition, the inspection for confirming the recorded magnetic data also has a problem that the reading cannot be performed properly unless the positional relationship between the recording position of the magnetic data and the perforation is correct.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems of the prior art, and provides a photographic film having a magnetic recording material which is capable of accurately performing magnetic recording on each frame or at the front and rear ends thereof. An object of the present invention is to provide a method for producing a photographic film cartridge using the same.

[0008]

In order to achieve the above object, according to the first and second aspects of the present invention, there is provided a method of manufacturing a photographic film in which perforations are arranged at a constant pitch and data by magnetic recording is written. In the method, the perforation is formed by driving a punch in synchronization with the transport of a photographic film, and the data is written by driving the recording magnetic head in synchronization with the operation of the punch. , At the start of recording,
The length of the photographic film between the punch and the magnetic recording head is made constant.

According to the third and fourth aspects of the present invention, the perforations are arranged at a constant pitch, and the data by magnetic recording is provided on at least one of the leading end and the trailing end of the photographic film cut to a fixed length. Wherein the trimmer is driven in synchronization with the transport of the photo film to cut the photo film into a predetermined length, and further, in synchronization with the operation of the trimmer, the recording magnetic head. Is driven to write the data, and at the start of recording, the length of the photographic film between the trimmer and the magnetic recording head is made constant. In a fifth aspect of the present invention, a reproducing magnetic head is disposed adjacent to the downstream of the recording magnetic head, and the data written by the recording magnetic head is read by transporting the photographic film immediately after recording. This is to check the data.

Furthermore, in the sixth paragraph claims a method of manufacturing a photographic film cassette which houses a spool wound written photo film and which data magnetically recorded on cassette body, a pre-sensitive material layer
Photographic film with magnetic recording layer formed in roll form
The data is written before the photographic film supplied and drawn out in a belt form from the roll form is wound into the cartridge body. In claims 7 and 8, it is preferable that after the data is written, before the photographic film is rolled into the cartridge body, the data is read by a reproducing magnetic head to confirm the written data. Alternatively, after writing the data, the photographic film is wound around the cartridge body up to the leading end of the photographic film, and then, when the spool is rotated to send the leading end of the photographic film out of the patrone body, the data is read and written by the reproducing magnetic head. after performing the confirmation of the data the photographic film to the tip again is that as involve the cassette shell.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. The photographic film cartridge manufactured by the photographic film and the method for manufacturing the photographic film cartridge using the photographic film according to the present invention has a structure as shown in FIG. 2, for example. This photographic film patrone 2 comprises resin upper and lower cases 3a and 3b constituting a patrone body 3,
It comprises a spool 4 rotatably housed therein and a photographic film 5 wound around the spool 4. The photographic film 5 is tightly wound between the flanges 4a and 4b of the spool 4, and is incorporated into the patrone body 3 so that the outermost periphery of the photographic film 5 is
Outer peripheral regulating ribs 6, 7 provided integrally on the inner walls of a, 3b
The photo film 5 is not loosened from the spool 4.

When the photo film cartridge 2 is assembled, the end 4c of the spool 4 coincides with the outer surfaces of the upper and lower cases 3a, 3b and does not at least protrude. Port portions 8 and 9 serving as discharge passages for the photographic film 5 are formed on the upper and lower cases 3a and 3b so as to protrude, and light-shielding telemps 10 are attached to the respective inner walls so as to face each other. The ends of the ports 8 and 9 serve as the film discharge ports. Further, a tip separation claw 12 is provided at the back of the port portion 9 of the lower case 3b.

When the spool 4 is driven clockwise by using a key provided at the end 4c of the spool 4, the photographic film 5 is tightly wound around the spool 4, so that the photographic film 5 is also spooled. Rotates with 4. When the front end portion 5a of the photo film moves to a position facing the discharge port 11, the front end separation claw 12 scoops up the photo film end portion 5a.
The front end portion 5a of the photographic film passes through the space between the telemps 10 and is sent out from the discharge port 11.

As shown in FIG. 3 (a), the photo film 5 is provided with two perforations 5b for each frame of the photographing range 5c.
Are provided with three perforations 5b for catching the tip. A magnetic recording unit 5d is provided between two perforations 5b provided in the photographing range 5c, and manufacturing information such as an ID code of the photographic film 5 is magnetically recorded. Further, the magnetic recording unit 5 is also provided at the leading end 5a of the photographic film 5 and the trailing end 5e of the photographic film.
d is provided, and the magnetic recording layer is formed in a band shape continuously at the upper and lower ends of the photographic film 5. FIG. 3 (b)
Is a shape of a cut portion of the photo film 5 which is cut off one by one of the photo film cartridges 2.
a and the rear end portion 5e of the photo film face each other and the cut-off portion 5
f is cut off in the manufacturing process.

FIG. 1 shows an example of a manufacturing apparatus according to a photographic film embodying the present invention and a method for manufacturing a photographic film cartridge using the same. In FIG. 1, a film roll 15 is a belt-like photographic film sheet material 16 driven by a drive motor. It is wrapped around a rotating shaft. The photosensitive material layer and the magnetic recording layer are previously formed on the sheet material 16 in the previous manufacturing process, and the sheet material 16 pulled out from the film roll 15 is sent to the punch 17 via a roller.

The sheet material 16 includes feed rollers 18a, 18
b, it is conveyed (about 1 m / sec to 5 m / sec), and the perforator 17 is driven in synchronization with this conveyance to form the perforations 5b. On the downstream side of the perforator 17,
A recording magnetic head 19 that is driven in synchronization with the operation of the perforator 17 is provided. The length of the sheet material 16 between the punch 17 and the recording magnetic head 19 is
It is kept constant at all times. Further, a reproducing magnetic head 20 is disposed downstream of the recording magnetic head 19, and the data written by the recording magnetic head 19 by the conveyance of the sheet material 16 immediately after recording is read and the read contents are confirmed. .

The perforation 5b is formed by the perforator 17.
Is formed, and the sheet material 16 on which the manufacturing information is written to the magnetic recording unit 5d by the recording magnetic head 19 is conveyed by the feed rollers 18a and 18b and sent to the trimmer 21. The trimmer 21 is also driven in synchronization with the conveyance, and cuts the sheet material 16 into a single photo film 5 of the photo film cartridge 2 in a shape as shown in FIG. The cut photographic film 5 is conveyed by further feed rollers 22a and 22b, and sent to the cartridge assembly unit 30.

A recording magnetic head 23 driven in synchronization with the operation of the trimmer 21 is provided on the downstream side of the trimmer 21 similarly to the perforator 17. The length of the photographic film 5 between the trimmer 21 and the magnetic recording head 23 is always kept constant. Further, a reproducing magnetic head 24 is also arranged downstream of the recording magnetic head 23, and the data written by the recording magnetic head 23 by transporting the photographic film 5 immediately after recording is read to confirm the contents. . The contents of the manufacturing information data can be arbitrarily recorded at the time of film production such as an ID code, a lot number, and a film sensitivity, and the writing position is also provided for each frame by a magnetic recording section 5d and a film tip 5d.
a and the magnetic recording unit 5d provided at the rear end 5e of the film.

The patrone assembly section 30 includes a spool receiving section 3 to which a spool 4 formed in a separate process is supplied.
0a, a film winding section 30b for winding the photo film 5 around the spool 4, and the spool 4
And an assembling section 30c to be incorporated in the. Assembly part 3
0c is a suction head 31 and a support head 32 which can be moved up and down freely.
Is provided. The suction head 31 supplies the upper case 3a from above and the support head 32 supplies the lower case 3b from below, and presses and mounts the spool 4 around which the photographic film 5 is wound. Suction head 31, support head 3
When the refuge 2 is retracted, the cradle 33 moves and the photographic film cartridge 2 is placed. An ultrasonic horn 34 is provided above a predetermined position of the receiving table 33, and applies ultrasonic vibration to the film cartridge 2 to weld the upper and lower cases 3a and 3b.

A description will be given of a method of manufacturing the photographic film 5 configured as described above and the photographic film cartridge 2 using the same. The photographic film cartridge 2 is manufactured by the above-described manufacturing apparatus shown in FIG. A band-shaped sheet material 16 in which a magnetic recording layer is formed at the upper and lower ends of the photosensitive material layer and the opposite surface outside the photographing range 5c in a separate process in advance is wound around a drive shaft and manufactured as a film roll 15. Built into the device. The sheet material 16 is a feed roller 18
a and 18b, and the punch 17 is driven in synchronization with the conveyance to form the perforations 5b.

A stepping motor is used to drive the feed rollers 18a and 18b, and transport and stop are repeated at predetermined intervals. The perforator 17 is a sheet material 1
In synchronization with the step feed of No. 6, the perforations 5b are opened in the sheet material 16 when the conveyance is stopped. Further, the sheet material 16 is conveyed by the feed rollers 18a and 18b, and the manufacturing information is written to the magnetic recording unit 5d by the recording magnetic head 19 provided at a certain distance downstream from the perforator 17.

Since the writing of data by the recording magnetic head 19 is performed while the sheet material 16 is being conveyed, the writing is performed in accordance with the conveyance of the sheet material 16 after the perforation 5b is opened. At this time, since the length of the sheet material 16 between the perforator 17 and the recording magnetic head 19 is kept constant, the positional relationship between the magnetic recording unit 5d where manufacturing information is written and the perforation 5b does not change. The manufacturing information is recorded at a predetermined position in one frame. The recording magnetic head 19
Is in contact with the sheet material 16 only when magnetic recording is being performed, and at other times it is in a retracted position so as not to damage the surface of the sheet material 16.

The sheet material 16 conveyed again by the feed rollers 18a and 18b reads data written by the recording magnetic head 19 by a reproducing magnetic head 20 disposed close to and downstream of the recording magnetic head 19. Can be Since the reproducing head 20 is provided close to the downstream of the recording magnetic head 19 for reproducing the data for confirming and inspecting the recorded contents, the recording magnetic head 19 writes the manufacturing information substantially at the same time. It can be carried out.
For this reason, it is not necessary to re-synchronize with the recording position at the time of data reproduction, which leads to simplification of the process.

The perforation 5b is formed by the perforator 17.
Is formed, and the sheet material 16 on which the manufacturing information is written in the magnetic recording unit 5d by the recording magnetic head 19 is conveyed to the trimmer 21 for cutting into a length to be stored in the photographic film cartridge 2. Feed rollers 18a, 18b
Downstream of the feeding rollers 22a and 22b, there are provided further feeding rollers 22a and 22b, which are driven by a stepping motor that repeats conveyance and stopping at predetermined intervals in the same manner as the feeding rollers 18a and 18b. The trimmer 21 also cuts the sheet material 16 when the conveyance is stopped.
A front end portion 5a and a rear end portion 5e of the photo film are formed in the shape shown in FIG.

The photographic film 5 separated from the sheet material 16 is transported by feed rollers 22a and 22b.
During the transport of the photographic film 5, the manufacturing information is transferred to the magnetic recording section 5d at the leading end 5a of the photographic film or the trailing end 5e of the photographic film by a recording magnetic head 23 provided at a predetermined distance away from the trimmer 21. Be recorded. At this time, since the length of the photographic film 5 between the trimmer 21 and the recording magnetic head 23 is kept constant, the magnetic recording section 5d where manufacturing information is written and the photographic film tip 5
The manufacturing information is recorded at a predetermined position of the photographic film 5 without changing the positional relationship between the photographic film 5 and the rear end 5e of the photographic film.

The photographic film 5 conveyed to the cartridge assembly section 30 by the feed rollers 22a and 22b
The read data is read by the reproducing magnetic head 24 disposed close to and downstream of the recording magnetic head 23. To reproduce the data for confirming and inspecting the recorded contents, the reproducing head 24 is connected to the recording magnetic head 23.
, The manufacturing information can be written substantially simultaneously with the recording magnetic head 23. For this reason, it is not necessary to re-synchronize with the recording position at the time of data reproduction as in the case of the above-mentioned inspection, which leads to simplification of the process.

The photographic film 5 cut to a predetermined length and having necessary manufacturing information written in the magnetic recording section 5d is conveyed to the film winding section 30b of the cartridge assembly section 30. The spool 4 formed by another process and supplied to the spool receiving portion 30a is on standby in the film winding portion 30b. The photo film 5 is a rear end 5e of the photo film.
The spool 4 is conveyed from the direction by the feed rollers 22 a and 22 b and locked at a predetermined position on the shaft of the spool 4. The photographic film 5 having the photographic film rear end 5e fixed to the spool 4 is completely wound up to the photographic film leading end 5a in the film winding section 30b.

The spool 4 around which the photographic film 5 is wound is rotated by being supported by the arm, and is moved to the assembling section 30c in the next step. The upper case 3a of the patrone main body 3 is attached to the suction head 31 which can be moved up and down in the assembling portion 30c from above.
The lower case 3b is supported by the support head 32 at the assembly position from below. The spool 4 around which the photographic film 5 is wound is housed with the upper and lower cases 3a and 3b sandwiched therebetween, and is mounted by being pressed between the suction head 31 and the support head 32. When the suction head 31 and the support head 32 are retracted, the receiving table 33 is moved by a cylinder device (not shown), and the photographic film cartridge 2 is placed on the upper surface.

When the cradle 33 returns to its original position, the ultrasonic horn 34 descends and applies ultrasonic vibration to the photographic film cartridge 2. By this ultrasonic vibration, the upper and lower case 3
Predetermined portions a and 3b are melted, and the patrone main body 3 is integrally welded. Thereafter, the photographic film cartridge 2 is sent to an inspection process, and only those which are determined to be non-defective by the structure and function confirmation inspection are shipped from the packaging factory.

Referring to FIG. 4 showing a second embodiment of the manufacturing method according to the present invention, a film roll 15 is provided with a rotating shaft for rotating a belt-shaped photographic film sheet material 16 by a drive motor in the same manner as in the previous embodiment. It is wrapped around. The photosensitive material layer and the magnetic recording layer are previously formed on the sheet material 16 in the pre-manufacturing process, and the sheet material 16 pulled out from the film roll 15 is passed through the perforator 1 via a roller.
It is sent to 7.

The sheet material 16 is fed by feed rollers 18a, 18
b, it is conveyed (about 1 m / sec to 5 m / sec), and the perforator 17 is driven in synchronization with this conveyance to form the perforations 5b. On the downstream side of the perforator 17,
A recording magnetic head 19 that is driven in synchronization with the operation of the perforator 17 is provided. When the perforation 5b is opened by the perforator 17, it is necessary to stop the conveyance of the sheet material 16, whereas to magnetically record by the recording magnetic head 19, the conveyance of the sheet material 16 must be continued. . Therefore, in order to keep the distance between the punch 17 and the recording magnetic head 19 more accurately and constant than in the previous embodiment, a buffer 40 for storing the sheet material 16 to some extent is provided.

A loop sensor 41 is provided at the bottom of the loop of the buffer 40, and measures the amount of storage in the buffer 40 so as to be constant. If the distance between the perforator 17 and the recording magnetic head 19 is, for example, an integral multiple of the frame interval, the perforation 5b moves immediately below the recording magnetic head 19 at the moment of starting the perforation, and starts magnetic recording after the perforation. Then, the magnetic recording unit 5d is provided at a position as shown in FIG. Further, a reproducing magnetic head 20 is arranged downstream of the recording magnetic head 19 in the same manner as in the above-described embodiment, and the content of data written by transporting the sheet material 16 immediately after recording is read and confirmed.

[0033] The sheet material 16 is photographic film patrone 2
Similarly, a buffer 42 is also provided between the trimmer 21 for cutting to a length accommodated in the recording medium and the recording magnetic head 23 provided on the downstream side so as to store the photographic film 5 to some extent. If the distance between the trimmer 21 and the recording magnetic head 23 is made equal to the film length, for example, the rear end portion 5e of the photographic film moves immediately below the recording magnetic head 23 at the moment of starting cutting, and the magnetic recording is performed after cutting. Is started, the magnetic recording section 5d is provided at a position as shown in FIG. Thereafter, the contents of the written data are read and confirmed by the reproducing magnetic head 24. The photographic film 5 cut into a predetermined length and having necessary manufacturing information written in the magnetic recording portion 5d is assembled as a photographic film cartridge in the same process as in the above-described embodiment.

FIG. 5 shows a third embodiment of the manufacturing method according to the present invention.
A sheet material 1 for a band-shaped photographic film as in the second embodiment.
6 is wound around a rotating shaft rotated by a drive motor. The photosensitive material layer and the magnetic recording layer are previously formed on the sheet material 16 in the previous manufacturing process, and the sheet material 16 pulled out from the film roll 15 is sent to the perforator 43 through a roller.

The sheet material 16 includes feed rollers 18a, 18
b and is transported (approximately 1 m / sec to 5 m / sec). In synchronization with this transport, the running perforator 43 is driven to form a perforation 5b. On the downstream side of the running perforator 17, a recording magnetic head 19 driven in synchronization with the operation of the running perforator 17 is provided. When the perforation 5b is opened by the perforator 43, the sheet material 16 is used.
Since it is not necessary to stop the transport of the recording head, it is also possible to perform magnetic recording with the recording magnetic head 19 while transporting simultaneously with the perforation. In order to keep the recording position constant, the distance between the running perforator 17 and the recording magnetic head 19 must also be kept constant.

The piercing device 17 pierces while repeatedly moving a fixed distance, but piercing always starts at the same position. Therefore, if the distance between the drilling start position of the running punch 17 and the recording magnetic head 19 is set to, for example, an integral multiple of the frame interval, the recording magnetic head 19 is set at the moment of the drilling start.
When the perforation 5b moves just below the position and magnetic recording is started with a slight shift in timing, the magnetic recording section 5d is provided at a position as shown in FIG. Further, a reproducing magnetic head 20 is arranged downstream of the recording magnetic head 19 in the same manner as in the above-described embodiment, and the content of data written by transporting the sheet material 16 immediately after recording is read and confirmed.

The sheet material 16 is used as a photo film patrone 2
The distance between the running trimmer 44 for cutting into the length accommodated in the recording head and the recording magnetic head 23 provided on the downstream side is also made constant. Since it is not necessary to stop the transport of the running trimmer 44, if the distance between the trimmer 44 and the recording magnetic head 23 is set to, for example, the film length, the rear end of the photographic film is immediately below the recording magnetic head 23 at the moment of starting cutting. If the unit 5e moves and starts magnetic recording with a slight shift in timing, the magnetic recording unit 5d is provided at a position as shown in FIG. 3B. Thereafter, the contents of the written data are read and confirmed by the reproducing magnetic head 24.
The magnetic recording unit 5d which is cut into a predetermined length and necessary manufacturing information is
Is assembled as a photographic film cartridge in the same process as in the first embodiment.

In the embodiment described above, the reproducing magnetic heads 20 and 24 for confirming the contents of the magnetically recorded manufacturing information and inspecting the reproducing characteristics are replaced with the recording magnetic heads 19 and 24.
Although it is provided close to the film 23, it may be performed at the same time as the film head inspection performed after the assembling of the photographic film cartridge 2. Further, the magnetic recording layer for performing magnetic recording is formed in a band shape continuously at the upper and lower ends of the photographic film 5, but it may be either one of the upper and lower sides, or the magnetic recording layer may be formed on the entire surface of the photographic film 5. It may be. At the time of magnetic recording, an optical sensor or the like can be arranged upstream of the recording magnetic heads 19 and 23 to make the recording position more accurate.

[0039]

As described above, according to the photographic film and the method for manufacturing the photographic film cartridge using the same, the distance between the punch or the trimmer and the magnetic recording head is made constant, and the punch or the trimmer is fixed. Since the recording magnetic head is driven in synchronization with the punching or cutting, the manufacturing information can be magnetically recorded accurately at a predetermined position on the film. Also, since the reproducing magnetic head for checking the contents of the magnetically recorded manufacturing information and inspecting the reproducing characteristics is provided close to the recording magnetic head, synchronization with the magnetic recording position on the film at the time of reproducing is separately established. There is no need to do so substantially at the same time, and the process can be simplified.

Further, by using the manufacturing method of the present invention, the content confirmation of magnetically recorded manufacturing information and the inspection of reproduction characteristics are performed simultaneously with the inspection of other photographic film cartridges. Does not require a lot of time. As described above, according to the manufacturing method of the present invention, it is possible to provide a method for efficiently and accurately recording magnetic data at the film frame position.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of an apparatus for manufacturing a photographic film cartridge embodying the present invention.

FIG. 2 is an exploded perspective view of a photographic film cartridge produced by the production method of the present invention.

3A and 3B are explanatory views of a film stored in the photographic film cartridge shown in FIG. 2;

FIG. 4 is an explanatory view showing a second example of a photographic film cartridge manufacturing apparatus embodying the present invention.

FIG. 5 is an explanatory view showing a third example of an apparatus for manufacturing a photographic film cartridge embodying the present invention.

[Explanation of symbols]

 2 Photo Film Patrone 3 Patrone Main Body 4 Spool 5 Photo Film 5a Photo Film Tip 5b Perforation 5c Photographing Range 5d Magnetic Recording Unit 5e Photo Film Rear End 15 Film Roll 16 Sheet Material 17 Perforator 19,23 Magnetic Head for Recording 20, Reference Signs List 24 Magnetic head for reproduction 21 Trimmer 30 Patrone assembling part 40, 42 Buffer 43 Running piercer 44 Running trimmer

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03C 1/765 G03C 1/00 GAP G03C 3/00 571 G03C 3/00 590

Claims (8)

(57) [Claims] In a method of manufacturing a photographic film in which perforations are arranged at a constant pitch and data is written by magnetic recording, the perforations are formed by driving a punch in synchronization with the conveyance of the photographic film. And a method for driving the recording magnetic head in synchronization with the operation of the punch to write the data. 2. The method of manufacturing a photographic film according to claim 1, wherein the length of the photographic film between the punch and the magnetic recording head is fixed at the start of recording. 3. A method of manufacturing a photographic film in which perforations are arranged at a constant pitch and data by magnetic recording is written on at least one of a leading end and a trailing end of the photographic film cut to a fixed length. In the above, the photo film is cut into a fixed length by driving the trimmer in synchronization with the conveyance of the photo film, and the recording magnetic head is further driven in synchronization with the operation of the trimmer to write the data. A method for producing a photographic film. 4. The method according to claim 3, wherein the length of the photographic film between the trimmer and the magnetic recording head is fixed at the start of recording. 5. A magnetic head for reproduction is arranged downstream of the magnetic head for recording in close proximity, and data written by the magnetic head for recording is read by transporting a photographic film immediately after recording to confirm write data. 4. The method for producing a photographic film according to claim 1, wherein the method is performed. 6. A photographic film cartridge in which a photographic film on which data is written by magnetic recording and a spool around which the photographic film is wound are housed in a patrone body, wherein a photographic material layer and a magnetic recording layer are formed in advance. Huy
Roll in roll form
A method for manufacturing a photo film cartridge, wherein the data is written before the drawn-out photo film is wound into the cartridge body. 7. The data reading device according to claim 6, wherein after the data is written, the data is read by a reproducing magnetic head to check the written data before the photographic film is wound around the cartridge body. Production method of film cartridge. 8. After the data has been written, the data is wound around the cartridge body to the leading end of the photographic film, and then the spool is rotated to send the leading end of the photographic film out of the cartridge body. reading method for producing a photographic film cassette according to claim 6, wherein to that was <br/> will involve the cassette shell after performing confirmation of the write data to the photographic film to the tip again.