JPH08272046A - Production of photographic film, photographic film cartridge and film unit provided with lens - Google Patents

Abstract

PURPOSE: To demagnetize a magnetic recording layer magnetized in a factory so as to improve quality. CONSTITUTION: This film unit with a lens where photographic film provided with the transparent magnetic recording layer is loaded is produced through a stage for producing photographic film, a stage for housing in a cartridge and a stage for producing a film unit with a lens. An eliminating stage is arranged after the stage for producing the photographic film and in the stage for producing the film unit with a lens, respectively. In the eliminating stage, the magnetic recording layer is demagnetized by an AC eliminating method in the form of the photographic film and in the form of the film unit with a lens.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film, a photographic film cartridge, and a method of manufacturing a lens-fitted film unit. More specifically, the present invention relates to a photographic film having a magnetic recording layer, and a photographic film cartridge containing the photographic film. The present invention also relates to a method for manufacturing a lens-fitted film unit loaded with this photographic film cartridge.

[0002]

2. Description of the Related Art A film unit with a lens has been provided by the applicant of the present invention so that a photograph can be easily enjoyed without having an ordinary camera. Such a lens-fitted photo film unit is a unit with an inexpensive taking lens and an exposure-imparting mechanism that has a photo film with a patrone built in in advance. Therefore, it is sufficient to submit it to the photo lab as it is after the photo is taken, and no troublesome film rewinding is required.

By the way, conventionally, a photographic film provided with a magnetic recording layer has been proposed (WO90 / 0425 (PC
T / US89 / 04366)). Such a photographic film is disclosed in JP-A-51-117632 and JP-A-52-1.
Various photographing information is recorded by the cameras proposed in Japanese Patent No. 333, JP-A-63-298233 and the like. These pieces of information are used for correction of exposure value at the time of printing, trimming, etc. so that a high-quality printed photograph in which the function of the camera and the performance of the photographic film are fully exhibited can be obtained. At the photo lab, the data for printing, the format of the screen size, the number of prints, the print size, etc. are recorded on the magnetic recording layer of the photo film, and the work for using the photo film after development is performed. We are trying to improve the efficiency of.

[0004]

As described above, when the magnetic information recording is carried out consistently from the photographing to the developing place by using the photographic film as a medium, the photographic film provided with the magnetic recording layer on the lens-fitted film unit as well. There is no choice but to use it. Therefore, when incorporating such a photographic film into the lens-fitted film unit, it may cause troubles at the developing station.Therefore, an erroneous signal such as noise on the magnetic recording layer causes a component mounting process or a photographic film loading process. It is necessary to prevent it from being recorded.

The present invention has been made in consideration of the above circumstances, and a method of manufacturing a photographic film, a photographic film cartridge, and a lens-fitted film unit whose quality is improved so that an erroneous signal such as noise is not recorded on the magnetic recording layer. The purpose is to provide.

[0006]

In order to achieve the above object, in the method for producing a photographic film of the present invention, a photographic film producing step of applying a magnetic recording layer to the photographic film and a magnetic recording from the outside in the form of a photographic film are performed. And an erasing step of demagnetizing the layer. Further, in the method for producing a photographic film cartridge, a cartridge storing step of storing the photographic film in the cartridge, and an erasing step of demagnetizing the magnetic recording layer of the photographic film from the outside in the form of the photographic film or the photographic film cartridge. The erasing process is performed at any one of the photo film manufacturing process and the cartridge storage process, or between the processes and after the cartridge storage process.

Further, in the method for manufacturing a film unit with a lens, a loading step of loading the photographic film cartridge into the film unit with a lens, and any one of the photographic film, the photographic film cartridge, and the film unit with a lens are provided. And an erasing step for degaussing the magnetic recording layer of the photographic film from the outside with the erasing step, the photographic film manufacturing step, the cartridge storage step,
And the loading step, or between the steps, and after the loading step. As an erasing method, there are a method of passing one by one inside a tubular conductor to which a magnetic field is applied, and a method of applying a magnetic field to an assembly formed by combining a plurality of them. The form at the time of erasing may be any of a photographic film, a photographic film cartridge, and a lens-fitted film unit. Also, as the erasing process,
Plural may be arranged.

The lens-fitted photo film unit (hereinafter referred to as "film unit") 10 is, as shown in FIG.
It is composed of an outer case 11 and a unit main body 12, and the outer case 11 is formed with openings for exposing the taking lens 13, the shutter button 14, the winding knob 15, the finder 16, the number display window 17 and the like to the outside. ing. A paper box or a resin case is used as the outer case 11.

The unit body 12 is, as shown in FIG.
It is composed of a main body base 18, a rear cover 19, an exposure unit 20, and a front cover 21.

The exposure unit 2 is provided on the front surface of the main body base 18.
0 is detachably attached. The exposure unit 20 is
The taking lens 13, a shutter mechanism, a film winding mechanism, a shutter charging mechanism, etc. are incorporated,
These are unitized. The rear cover 19 is detachably attached to the back of the main body base 18, and
The photo film 22 with a patrone is housed in a light-tight manner between 8 and 8.

The front cover 21 is detachably attached to the front surface of the main body base 18, and the exposure unit 20 is sandwiched between the front cover 21 and the main body base 18. On the upper surface of the front cover 21, a shutter button 14 is formed by cutting out a part thereof so as to be elastic.
Is provided. When the shutter button 14 is pressed, the shutter mechanism of the exposure unit 20 operates.

The main body base 18 has a cartridge storage chamber 25 for storing the cartridge 24, and a film roll chamber 27 for storing the unexposed photographic film 26 drawn from the cartridge 24 in the form of a film roll 26a.
And are integrally molded. This film roll 26a
Is wound around the outer periphery of the core 28, and the core 2
It is stored in the film roll chamber 27 in a state of being wound around 8.
The upper and lower ends of the winding core 28 are rotatably supported inside the film roll chamber 27 by fork members 29 and 30 provided on the rear cover 19. The core 28 may be omitted and only the film roll 26a may be stored. In this case, the fork member 29 can be omitted.

The bottoms of the cartridge storage chamber 25 and the film roll chamber 27 are open, and after the photo film 22 with the cartridge is loaded, they are closed by pull-top type bottom covers 31 and 32 provided on the rear cover 19, respectively. Be done.
The bottom lid 31 serves as a lid when the cartridge 24 is taken out along the axial direction of the spool 35.

The winding knob 15 is used in the cartridge storage chamber 2
5, which is rotatably arranged on the upper surface of
The cartridge 35 is engaged with the spool 35 of the cartridge 24 loaded in the. A part of the winding knob 15 is exposed from the opening 36 of the rear cover 19. By rotating the exposed part in the film winding direction (counterclockwise direction shown in the figure), the spool 35 winds the film. The exposed photographic film 26 is wound inside the cartridge 24 by rotating in the direction.

A dark box 33 is provided between the cartridge storage chamber 25 and the film roll chamber 27. Dark box 33
An exposure opening 37 (aperture) that is curved around the optical axis 13a of the taking lens 13 is formed on the back side of the taking lens 13 in order to correct the field curvature of the taking lens 13. An opening 34 is formed on the front side of the dark box 33. The opening 34 exposes the subject light that has passed through the taking lens 13 when the exposure unit 20 is attached.
It is for leading to 7. The dark box 33 may be provided in the exposure unit 20. In addition, the dark box 33 is divided and a part is provided in the exposure unit 20 and the other part is provided in the main body base 18,
The dark box 33 may be formed by attaching the exposure unit 20 to the main body base 18.

As shown in FIG. 3, the rear end of the photo film 26 is locked to the spool 35. As shown in FIG. 3, the photo film exposure portion 26c used for photographing, the film front end portion 26b and the film rear end not usable for photographing, And part 26d. The film exposure section 26c has perforations 39, 4 of different sizes along one side edge.
The perforations 39 and 40 arranged with two 0s alternately and at short intervals are arranged so as to always form a pair, and the perforations 39 and 40 with long intervals are arranged.
The film feeding direction (longitudinal direction) at the center of
Exposure is performed in a state where it is aligned with the center of the frame, and a frame 38 is formed. The perforations 39 and 40 are not limited to different sizes and may have the same size.

The photo film 26 is preliminarily set in the factory for a length of one frame or less from the first frame 38b.
The film roll 26a is formed in a state where it is pulled out from. As a result, the photographic film 26 is provided in the exposure opening 37.
The state immediately before the setting of the first frame 38b is set.

The photographic film 26, as shown in FIG.
The thickness of 2 ~ on one side sandwiching the support 42 of 70 ~ 120 μm in thickness
A photosensitive layer 43 having a thickness of 4 μm and a transparent magnetic recording layer 44 having a thickness of 10 to 14 μm are coated on the opposite side. As the support 42, polyethylene naphthalate (PEN), annealed polyethylene naphthalate (A-PEN), and triacetyl cellulose (TAC) materials are used.

The photographic film 26 is supposed to be loaded in a camera equipped with a recording head. In such a camera, various photographing information such as light source information, daytime synchronization information, portrait information, and backlight information is magnetically recorded at a position outside the range of the frame 38 for each photographing. This information is used at the time of printing at the photo lab. Since the transparent magnetic recording layer 44 is provided on the entire surface, it is not necessary to limit the recording position to outside the range of the frame 38.

[0020]

EXAMPLE As shown in FIG. 5, the production of the film unit 10 includes a photographic film manufacturing process, a cartridge storage process,
It is roughly divided into a lens-fitted film unit manufacturing process, and an erasing process is arranged before the cartridge storage process and in the lens-fitted film unit manufacturing process.

The photo film manufacturing process is directly connected to the cartridge storage process. As shown in FIG. 6, the photo film supply unit 48, the perforating device 49, the standard length / cutting device 50, the distributing device 51, 3 film winding units 5
2 to 54. Film winding unit 5
2 to 54 are film winding devices 52a, 53a, 54
a, Patrone supply / discharge device 52b, 53b, 54
b, and Patrone delivery device 52c, 53c, 54c
It consists of and.

The photosensitive layer 43 is applied while pulling out the support 42 in a strip shape to form a long photographic film. A magnetic recording layer 44 is coated on the long photographic film. The support 42 may be coated with the magnetic recording layer 44, and then the photosensitive layer 43 may be coated. The photographic film 26 provided with the magnetic recording layer 44 is a reel 55.
To be wound up. The reel 55 is set in the photographic film supply section 48. The long photo film 26 is
With the photosensitive layer 43 side facing up, the photosensitive layer 43 is pulled out horizontally from the reel 55, and the perforation device 39, 40
Are sequentially drilled.

The standard length / cutting device 50 measures the length of the long photo film 26 by the standard length feed roller 50a by a predetermined length, and then cuts it by the cutting mechanism 50b to obtain a striped photo. The film 26 is created. At the time of this cutting, the trailing end side of the long photographic film 26 in the conveying direction is the leading edge of the photographic film 26 shown in FIG. The holes 26e, 26f, and 26g are formed at the same time as the rear end of the film 26, and holes 26e, 26f, and 26g for locking the spool 35 are formed at the same time.

The standard length / cutting device 50 is provided with a sensor 50c for detecting the quality of the perforations 39, 40 perforated.

The distribution device 51 distributes the photographic film 26 to the three film winding units 52 to 54, respectively. As a result of the detection by the sensor 50c, when a mistake in perforation of the perforations 39 and 40 is detected, the photographic film 26 is distributed to the defective product unloading section 56.

The photographic film 26 sorted by the sorting device 51 is transported to the film winding units 52 to 54 through the transport chutes 57 to 59, respectively.
These transport chutes 57 to 59 are arranged inside the dark room 60. An erasing step is arranged on each of the transport chutes 57 to 59.

In the erasing step, the magnetic recording layer 44 of the photographic film 26 is demagnetized by using the AC erasing method.
As shown in FIG. 5, it is composed of a tubular (tunnel-shaped) conductor 61, a coil 62, and an erasing circuit 63. Conductor 6
A photographic film 26 passes through the inside of No. 1 at a constant speed. The coil 62 is wound a plurality of times around the outer circumference of the conductor 61, and a large alternating current is supplied from the erasing circuit 63. The erasing circuit 63 controls the alternating current so that the polarity of the magnetic field applied to the inside of the conductor 61 is sequentially reversed, so that the magnetic pole strength of the magnetic recording layer 44 is smoothly converged to zero and demagnetized.

The magnetic recording layer 44 of the photographic film 26 is once magnetized to a saturated state by receiving a strong AC magnetic field when passing through the inside of the conductor 61. Since this alternating magnetic field is reduced in the positive and negative directions by reversing the polarity several times, when the photographic film 26 is conveyed in a constant direction at a constant speed, the magnetic recording layer 44 is finally subjected to a gradually decreasing magnetic field. Is demagnetized to zero. The conductor 61 may have a rectangular tube shape instead of the circular tube shape. As the erasing method, the magnetic recording layer 44 may be demagnetized by the direct current erasing method.

The film winding units 52 to 54 are composed of film winding devices 52a, 53a and 54a, cartridge feeding / discharging devices 52b, 53b and 54b, and cartridge transferring devices 52c, 53c and 54c. A cartridge 24 incorporating a spool 35 is supplied to the cartridge supply / discharge devices 52b, 53b, 54b.
The cartridge transfer devices 52c, 53c, 54c supply the cartridge 24 supplied from the cartridge supply / discharge devices 52b, 53b, 54b in the bright room to the film winding devices 52a, 53a, 54a in the dark room. The film winding devices 52a, 53a, 54a are arranged in a dark room, the film rear end portion 26d of the photographic film 26 is captured by an insert plate, and is locked to the spool 35 inside the cartridge 24 in the winding position as it is, Spool 35 after locking
Is rotated to wind the photo film 26 around the spool 35. As a result, the photographic film 26 is entirely stored inside the cartridge 24. The photo film patrone containing the photo film 26 is supplied again by the patrone.
It is discharged to the discharge devices 52b, 53b, 54b.

The discharged photographic film cartridges are classified into those which are commercially available as they are and those which are loaded into the film unit 10. Commercially available photographic film patrones are patrone supply / discharge devices 52b, 53b, 54.
It is transported from b to the packaging process and shipped. Moreover, what is loaded in the film unit 10 is supplied to the film unit manufacturing process.

In the film unit manufacturing process, the unit main body 12 is assembled. Unit body 12
As for the assembly of, the exposure unit 20 is assembled first. The completed exposure unit 20 is attached to the main body base 18. Then, after the front cover 21 is attached to the main body base 18, the photo film with the cartridge is loaded. The photo film with a patrone loading process is a dark room, and here is a photo film with a patrone 22
Is supplied.

In the step of loading the photo film with a patrone, as shown in FIG. 8, the photo film with a patrone 2
The photographic film 26 is pulled out from the patrone 24 of No. 6 to form a film roll 26a. Then, the film roll 26a thus prepared is loaded into the film roll chamber 27, and the cartridge 24 is loaded into the cartridge storage chamber 25. After that, the rear cover 19 is attached, and the bottom lid 31,
By closing the bottoms of the cartridge storage chamber 25 and the film roll chamber 27 with 32, the photo film 22 with a cartridge is light-tightly stored, and the unit main body 12 is completed.

At this time, there is a possibility that the magnetic recording layer 44 is magnetized by the magnetization source in the step of loading the photographic film cartridge. For this reason, after erasing again in the erasing step, it is conveyed to the packaging step.

In the erasing step, the magnetic recording layer 44 of the photographic film 26 loaded by the AC erasing method is demagnetized, and has the same structure as described with reference to FIG. The difference is that the photographic film 26 is covered with a cover, that is, in the form of the unit main body 12, this is passed through the conductor 61 at a constant speed to demagnetize the magnetic recording layer 44.

After passing through the erasing process, the unit body 12 is
The film is transported to the packaging step, covered with the outer case 11 here, and then shipped as a film unit 10 in a shipping form.

The user who has purchased the film unit 10 carries out the operation in the conventional manner to take a picture. This operation is a film winding operation of rotating the winding knob 15 in the film winding direction. By this film winding operation, the photo film 26 is moved to the film roll chamber 2
7 is transferred to the cartridge storage room 25. The intermittent sprocket engaged with the perforations 39 and 40 is rotated by using this transfer, and the shutter charging mechanism charges the shutter mechanism by utilizing the rotation of the intermittent sprocket. By the transfer of the photographic film 26 for one frame, the film winding stopping mechanism prevents the sprocket from rotating and the winding knob 15 from rotating. As a result, the first frame 38b is set in the exposure opening 37. During this time, the film counter mechanism advances the number display plate by one graduation, and the number display window 17
The remaining number of frames at that time is displayed on.

When taking a picture, framing is performed and the shutter button 14 is pressed. As a result, the shutter mechanism operates, and during this operation, the subject light is transmitted through the taking lens 13 and enters the photographic film 26, and the first frame 38b is exposed. This shutter mechanism releases the operation of the film winding stop mechanism after the shutter release to allow the next film winding operation.
The exposed photographic film 26 is wound into the inside of the cartridge 24 by repeatedly performing photographing in the same manner.

Then, the final frame 3 of the photographic film 26
When the photographing is finished at 8a, the film canter mechanism blocks the operation of the film winding stop mechanism. As a result, all the photo films 26 can be stored inside the cartridge 24.

The film unit 10 which has been photographed is
It is submitted to the photo lab as it is. Many photo film patrones taken by the camera are also submitted to the photo lab. At the developing station, the outer case 11 of the film unit 10 is broken, the bottom lid 31 is opened, and the cartridge 24 is taken out. From the Patrone 24 that was taken out, the exposed photo film 2
6 is drawn out and developed.

The developed photographic film 26, as shown in FIG. 9, is a film mask 71 of a printer processor 70.
Be transported to. The developed photo film 26 is
The images photographed by the film unit 10 and those photographed by the camera are mixed and continuously conveyed without being sorted. This conveyance is controlled so that each frame 38 is automatically positioned at the opening of the film mask 71. In the process of sequentially transporting each frame 38 to the opening, the photographic information recorded on the magnetic recording layer 44 of the photographic film 26 is read by the reproducing head 72 from the photographic film 26 photographed by the camera having the magnetic recording function. . This shooting information is sent to the controller 74 via the decoder 73. Further, the photographing information is not read from the photo film 26 photographed by the film unit 10. In addition, the photometric scanner 75 photometrically separates arbitrary points on each frame 38 and sends the photometric data to the controller 74 as photometric data. The controller 74 controls each frame 38
When the image is printed, the photographing information is displayed on the display unit such as the display 76.

The operator confirms the intention of the photographer and the type of light source from the displayed information, and performs the operation of correcting the exposure amount for printing from the keyboard 77 in accordance with this. If the shooting information is not displayed, no correction is performed. The correction amount is recorded on the magnetic recording layer 44 by the recording head 78 after printing,
Used for reprinting. At this time, laboratory information such as the screen size format, the number of prints, and the print size is also input from the keyboard 77 and recorded in the magnetic recording layer 44. Only the lab information is recorded on the developed photographic film 26 used in the film unit 10.

At the time of printing, the controller 74 calculates the exposure value necessary for determining the printing light amount from the photometric data, and corrects the exposure value when a correction operation is performed by the operator.

A light source 79 is provided below the film mask 71.
And a dimming diffusion unit 80 are arranged. Light control diffusion unit 80
Adjusts the light quality of the light source 79 based on the exposure amount for printing and diffuses it uniformly. A zoom lens 81 and a shutter 82 are arranged on the film mask 71. The zoom lens 81 forms an image of the print target frame 38 on the color paper 83. The exposure of the shutter 82 is controlled by the controller 74 so that the color paper 83 provides an appropriate exposure.

The color paper 83 is wound into a roll and is set at the print position by the paper feed roller pair 84. Then, after the controller 74 actuates the shutter 82, the color paper 83 that has been exposed by printing is sent to the processor section 85, where it is developed and dried, and then cut one frame later by the cutter 86, and then the stacking section. It is discharged to 87 as a print photograph.

There is also a type of film unit with a lens in which photographing information is recorded on the magnetic recording layer 44 of the photographic film 26. In this case, it is processed in the same manner as the photo film 26 taken by the above-mentioned camera. By the way, when noise or the like occurs in the magnetic recording layer 44 of the photographic film 26, for example, the exposure value or the zoom magnification,
Or, there is a possibility that the lab information etc. may be read by mistake,
In the photographic film 26 of this embodiment, the magnetic recording layer 44 is degaussed in advance at the factory so that troubles caused by such erroneous reading can be prevented. Further, the commercially available photographic film 26 is also demagnetized in advance at the factory, so that the same effect can be obtained.

The magnetic recording layer 44 may be demagnetized in the form of a photographic film cartridge, that is, a photographic film 22 with a cartridge in which all the photographic films 26 are stored. Alternatively, the demagnetization may be performed with the outer case 11 covered, that is, in the form of the film unit 10. In addition, photo film Patrone 22
Alternatively, the process may be performed by fixing the lens-fitted photo film unit 10 during formation. Furthermore, in the erasing step, it is not necessary to incorporate it in the line, and for example, a magnetic field may be applied to the aggregate of a plurality of groups outside the line to demagnetize the magnetic recording layer.

[0047]

As described above, according to the present invention, the erasing step for demagnetizing the magnetic recording layer of the photographic film from the outside is arranged in any form of the photographic film, the photographic film cartridge, and the lens-fitted film unit. Therefore, recording of an erroneous signal such as noise can be reliably prevented, and the quality can be improved. According to the third aspect of the invention, since the magnetic recording layer is demagnetized by passing through the tubular conductor to which the magnetic field is applied, the erasing step can be incorporated in the manufacturing step, and the production efficiency is improved. . According to the invention described in claim 4, when the production line is composed of a plurality of lines, if the erasing process is carried out by stocking each line without incorporating the erasing process into the line, the erasing process is incorporated into the line. Since it is not necessary to consider various mechanisms and processing capacities at that time, it can be achieved at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a lens-fitted film unit.

FIG. 2 is an exploded perspective view of a unit main body.

FIG. 3 is a schematic explanatory view of a photographic film with a cartridge as seen from the emulsion surface side of the photographic film.

FIG. 4 is a sectional view of a photographic film.

FIG. 5 is a flowchart showing a production process of a film unit with a lens.

FIG. 6 is a schematic explanatory view of a photographic film manufacturing process and a cartridge storage process.

FIG. 7 is a schematic explanatory diagram of an erasing step.

FIG. 8 is a schematic explanatory diagram of a photo film loading process with a cartridge.

FIG. 9 is a schematic explanatory diagram of a printer processor.

[Explanation of symbols]

 10 Film unit with lens 13 Photographic lens 24 Patrone 26 Photo film 44 Magnetic recording layer 52 Patrone winding unit 61 Conductor 62 Coil 63 Erase circuit

Claims (5)

[Claims] 1. A method of manufacturing a photographic film provided with a magnetic recording layer, comprising: a photographic film manufacturing step of providing a magnetic recording layer on a photographic film; and an erasing step of degaussing the magnetic recording layer from the outside in the form of a photographic film. A process for producing a photographic film, which is characterized by comprising: 2. A method for manufacturing a photographic film cartridge in which a photographic film having a magnetic recording layer is housed in a cartridge, the method comprising the steps of manufacturing a photographic film having a magnetic recording layer, and a photographic film having a magnetic recording layer. The photographic film comprises a step of storing the film in the cartridge and a step of erasing the magnetic recording layer of the photographic film from the outside in the form of a photographic film or a photographic film cartridge, and the erasing step includes the photographic film. A method of manufacturing a photographic film cartridge, which is performed in any one of the manufacturing step or the cartridge storing step, or between the steps and after the cartridge storing step. 3. A method of manufacturing a photographic film unit with a lens, in which a photographic film provided with a magnetic recording layer is housed in a cartridge, the method comprising the steps of: providing a magnetic recording layer on the photographic film; The photo film obtained in the photo film manufacturing process is stored in a cartridge, a photo film obtained in the photo film storing process is loaded into a lens-fitted film unit, the photo film and the photo. A film cartridge, and an erasing step of degaussing the magnetic recording layer of the photographic film from the outside in any form of a film unit with a lens, the erasing step, the photographic film manufacturing step, a cartridge storage step, And any of the loading steps, or between steps, Method of manufacturing a film unit which comprises carrying out either after the loading process. 4. The photographic film and the photographic film cartridge according to claim 1, wherein in the erasing step, the magnetic recording layer is demagnetized by sequentially passing through a tubular conductor to which a magnetic field is applied. And a method of manufacturing a film unit with a lens. 5. A photographic film and a photographic film cartridge according to claim 1, wherein in the erasing step, a magnetic field is applied to an aggregate of a plurality of groups to demagnetize the magnetic recording layer. And a method of manufacturing a film unit with a lens.