JPH04125546A - Magnetic recording and reproducing device for photographic film and film carrier - Google Patents

Abstract

PURPOSE:To smoothly feed a photographic film by releasing a magnetic head from contacting the magnetic recording layer of the film when a discontinuous part of the photographic film passes the magnetic head. CONSTITUTION:During the conveyance of the film 10, the magnetic head 15 reads film recording information out of the magnetic recording layer and the printer data are written in the recording layer by a magnetic head 18. Then when the discontinuous part 10a of the film 10 is detected by a sensor 13, a controller 23 tracks the discontinuous part according to the detection timing and film feed quantity and rotates a cam when the discontinuous part is at the heads 15 and 18 to release the heads 15 and 18 from being pressed against a pressure pad 40. After the part 10a passes, the film 10 is clamped.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a magnetic recording and reproducing device for photographic film and a film carrier, and particularly to a magnetic recording and reproducing device for photographic film in which film recording information is recorded in the magnetic recording layer in addition to photographing images. The present invention relates to a magnetic recording/reproducing device and a film carrier.

[Prior art] In addition to shooting images on film, various types of recorded information such as film information and shooting information are recorded on a recording medium, which is wound and stored in a cartridge, and printed by referring to this recorded information. A completely new type of photographic film cartridge has been proposed.

(Problem to be Solved by the Invention) When printing such photographic film cartridges, in large-scale photofinishing laboratories, as in the past, many orders of film are joined together to make a long length, and then the film is rolled. The film is wound up into a shape and subjected to various processing such as development, negative inspection, and printing.

At the time of negative inspection or printing, the amount of exposure correction is determined and the number of prints, size, etc. are specified based on the film recording information recorded in the magnetic recording layer of the film. For this reason, the negative verification machine and printer are provided with a magnetic recording/reproducing device for reading film recording information and writing new print instruction information and the like.

However, the above-mentioned photographic film is different from ordinary magnetic tape in that it is made of pieces of each order joined together using splice tape, etc., and also has perforations and discontinuous parts. There is. Therefore, there is a possibility that the magnetic head may get caught in this discontinuous portion, and in such a case, a film conveyance failure occurs.

On the other hand, if the magnetic head is moved slightly away from the magnetic recording surface in order to eliminate such snags at discontinuous portions, the S/N ratio during recording or reproduction will be low, resulting in recording or reproduction defects.

The present invention is intended to solve the above-mentioned problems, and provides a magnetic recording and reproducing device for photographic film, which performs magnetic reproduction or recording reliably and prevents the magnetic head from getting caught even in discontinuous parts of the photographic film. The purpose is to provide film carriers.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a magnetic head displacement means for displacing a magnetic head into a state in which the magnetic head is brought into close contact with the magnetic recording layer of a photographic film and a state in which this contact is released, a means for feeding a photographic film, and a means for transporting a photographic film. means for detecting a discontinuous portion during film feeding, and detecting the timing at which the discontinuous portion passes a magnetic head using the discontinuity detection signal;
The apparatus is provided with a control means that controls the magnetic head displacement means to bring the magnetic head into a non-contact state during this passage.

Further, another invention provides a window for film observation or exposure;
In a film carrier having a film passage passing through this window, a sensor for detecting a discontinuous part of the film is provided at a film entrance part of the film passage with the window as a boundary, and a film record recorded on a magnetic recording layer of the film. A magnetic reproducing head for reading information and a head displacement means for displacing the magnetic reproducing head into a state in which the magnetic reproducing head is in close contact with the magnetic recording layer of the photographic film and in a state in which this contact is released are provided, and the film in the film path is provided with the window as a boundary. At the exit side, there is a magnetic recording head for recording print information on the magnetic recording layer of the film, and a head for moving the magnetic recording head into and out of close contact with the magnetic recording layer of the photographic film. and a control means for controlling each head displacement means to bring each head into a contact release state when the discontinuous portion passes through each of the heads based on the detection signal of the discontinuous portion. be.

[Effect]

During film transport, film recording information recorded on the magnetic recording layer of the film is read by a magnetic head. When a discontinuous part of the photographic film, such as a splice area where a yahafration is formed, passes through the magnetic head, the timing of this passage is detected, and the magnetic head that is in close contact with the magnetic recording layer of the film at the time of this passage is detected. The head is released from its close contact. This allows the film to be smoothly fed without the discontinuous portions being caught by the magnetic head. Furthermore, since the magnetic head is in close contact with the magnetic recording layer except when passing through a discontinuous portion, magnetic recording or reproduction can be performed reliably.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 2 shows an outline of a film carrier embodying the present invention, and FIG. 3 shows its appearance. This film carrier is set in the exposure position of a photographic printer. An exposure window 11 is formed in the film carrier, and a film path 12 is formed to pass through the exposure window 11. The film passage 12 is composed of a film entrance side portion 12a and a film exit side portion 12b with the exposure window 11 as a boundary.

In the film entrance side portion 12a, discontinuous portions 10a such as a splice tape 10b of the film 10 and perforations 10c for frame positioning are disposed in order from the film entrance side.
A perforation sensor 17 for detecting the perforation 10b for frame positioning, a pair of film feed rollers 14, a magnetic head 15 for reading information, and a pair of film feed rollers 16 are arranged.

Further, in the film exit side portion 12b, information writing magnetic heads 1 are arranged in order from the exposure window 11 in the film feeding direction.
8 and a pair of film feed rollers 19 are arranged. Each film feed roller pair 14°1619 is driven by a pulse motor 2
Rotated synchronously by 0.

The discontinuous portion detection sensor 13 includes a light emitter 13a and a light receiver 13b, and detects the discontinuous portion 10a of the film 10 based on a change in transmission density. Note that a reflective optical sensor may be used as the sensor 13 instead of a light emitting/receiving optical sensor.

This discontinuous portion detection signal from the sensor 13 is sent to the controller 23.

The information reading magnetic head 15 includes a magnetic reading circuit 25.
It is connected to the. The magnetic reading circuit 25 amplifies the weak voltage signal from the magnetic bed 15, converts it into a film recording information signal, and sends this to the controller 23. Further, the information writing magnetic head 18 is connected to a magnetic recording circuit 26 .

The magnetic recording circuit 26 converts the Chiga inspection information and print instruction information sent from the controller 23 into magnetic recording signals, and drives the information writing magnetic head 18 based on this signal.

As shown in FIG. 1, the information reading magnetic head 15 is attached to a bracket 3 such that it can freely enter and retract into the film passage 12 through a hole 31 formed in the film carrier body 30.
It is attached to 2.

The bracket 32 is attached to the film carrier body 30 so as to be freely shiftable in the vertical direction. A cam 34 for moving the magnetic head 15 into and out of the film path 12 is disposed on the bracket 32 . Further, a coil spring 35 is arranged between the bracket 32 and the film carrier body 30 to bias the bracket 32 upward. Furthermore, a buffer plate 36 fixed to the bracket side is arranged at the sliding contact portion between the cam 34 and the bracket 32.

Further, a pressing pad 40 is arranged below the magnetic head 15 so as to sandwich the film 10 therebetween. Like the magnetic head 15, this pressing band 40 is also attached to the film carrier body 30 by a bracket 41 so as to be freely shiftable in the vertical direction. And magnetic head 1
Similarly to 5, the cam 42 is adapted to be displaced between a pressing position in which the cam 42 protrudes onto the film path 12 and presses the film 10, and a position in which the cam 42 is retracted from this position. Note that there is a coil spring 43 between the bracket 41 and the film carrier body 30 that urges the bracket 41 downward.
A buffer coil spring 45 is also arranged between the bracket 41 and the cam 42.

Information writing magnetic head 18 and information reading magnetic head 15
It is equipped with a head shift mechanism and a press pad mechanism similar to those described above, and the explanation thereof will be omitted.

An arm 47 is attached to the rotation shaft 32a, 42a of each of the cams 34, 42. A plunger 48a of a solenoid 48 is attached to the tip of the arm 47, and when the solenoid 48 is energized, the arm 47 is rotated by a certain angle, so that the cams 34 and 42 keep the magnetic head 15 and the pressing pad 40 in close contact with each other. It is released and the film 10 is opened. This state is shown in FIG.

When the solenoid 48 is turned off, the cams 34 and 42 return to their original state and the magnetic head 15 is turned off, as shown in FIG.
And the pressing pad 40 is made to protrude into the film path 12, and the film 10 is held in a sandwiched state by these.

As shown in FIG. 2, the controller 23 drives the pulse motor 20 to feed the film feed roller pair 14.16.1.
9, the film feed amount is detected by counting the number of drive pulses based on the detection signal of the discontinuous portion 11a, and each magnetic spatula)"1 of the discontinuous portion 11a is rotated.
Detect the passing timing of 5.18. Then, the solenoid 48 is energized based on this passing timing, and the film 1 is moved between the magnetic head 15 and 18 and the pressing pad 40.
0 is released from the pinched state. Similarly, each frame 10d recorded on the film is positioned in the exposure window 11 by advancing the film 10 by a certain amount after the perforation signal is detected by the perforation sensor 17.

A light source section 50 of a photographic printer is arranged below the exposure window 11 of the film carrier. The light source section 50 includes a light source 51, a light quality adjustment section 52 that adjusts the intensity of the trichromatic light components of the light source 51, and a diffusion box 53 that sufficiently diffuses and uniformizes the light quality-adjusted light. Further, above the exposure window 11, a lens 55, a shutter 56, and color paper 57 are arranged. color paper 57
is pulled out from the magazine and set at the print position, as is well known. And the exposed color paper 5
7 is wound up into a roll and then set in a vapor processor and subjected to development processing.

Next, the operation of this embodiment will be explained. The film recorded on the camera side on the transparent magnetic recording layer, along with the ↑ shadow information of the image, is made into a long film 10 in which each order of film is spliced by a film splicer at the processing laboratory.
Processed. Then, after the development process, the negative is inspected,
This negative verification data is magnetically recorded on the magnetic recording layer of the film for each order by a film carrier of a negative verification machine having the same structure as the film carrier set in the printer.

This negative verified film 10 is set in the film carrier of the printer. In the film carrier, positioning perforations 1 formed on the film 10
By detecting 0c by the perforator sensor 17, each frame is set in the exposure window 11. Further, while the film 10 is being transported, the magnetic recording layer is scanned by each magnetic head 15.18, and the film recording information recorded on the magnetic recording layer is read by the magnetic head 15, and printer identification information, exposure correction data, etc. Printer data is written to the magnetic recording layer by the magnetic head 18.

Eventually, the discontinuous portion 10a of the film 10 becomes the sensor 13.
When detected, the controller 23 tracks the discontinuous portion from this detection timing and film feed amount, and when the discontinuous portion is located at each magnetic head 15, 18, as shown in FIG. 34 and 42 to release the pressure between the magnetic heads 15 and 18 and the pressing band 40. This includes a magnetic head 15.18 and a pressing band 4.
The sandwiching of the film 10 by the magnetic heads 15 and 18 and the pressing pad 4 is released, and the film is in an open state.
Move between 0 and 0. This prevents the discontinuous portion 10a of the film 10 from getting caught by the magnetic head 15, 18, etc. Moreover, as shown in Fig. 1, the discontinuous portion 1
After passing 0a, the cams 34 and 42 return to their original positions,
The magnetic heads 15, 18 and the pressure pad 40 are projected into the film path 12, and the film 10 is held between them, so that the film recording information can be read from the magnetic recording layer of the film 10 and exposure correction data during printing can be read by the printer. Writing of identification number data, etc. is performed reliably.

The above embodiment is a case in which the film carrier is attached to a printer, but the film carrier may also be set in a negative inspection machine such as a notature puncher or a video color analyzer to obtain information such as 1 shadow information during negative inspection. It is also possible to read film recording information and write negative verification data to the magnetic recording layer. Furthermore, the present invention may be implemented in magnetic recording and reproducing devices for photographic film, such as reception machines and collation machines.

Further, in the above embodiment, the rectangular parallelepiped-shaped press pad 40 is fixed to the bracket 41, but in addition to this, the press roll may be rotatably attached to the bracket. In this case, since the pressure roll comes into rolling contact with the film, it is possible to prevent the photosensitive emulsion layer from being scratched. Also, cam 34.
42 is rotated by a predetermined angle by a solenoid 48, but it may also be rotated by a motor or the like.

Furthermore, in addition to releasing the close contact using the cams 34 and 42, a link mechanism or the like may be used.

Further, the tracking of the discontinuous portion 10a is carried out by the pulse motor 2 rotating the film feed roller pair 14, 16, 19.
Although this is done by counting the number of 0 drive pulses, it is also possible to provide an encoder in the film path to detect the amount of film feed, thereby detecting the amount of film feed.

[Effects of the Invention] As explained above, according to the present invention, a discontinuous portion of a photographic film is detected, and when this discontinuous portion passes a magnetic head, the magnetic head is released from close contact with the film. This prevents the discontinuous portion from getting caught in the magnetic head, which improves the transport stability of the magnetic head, and also prevents damage to the magnetic head and scratches on the photographic film. In addition, since the magnetic head can be securely brought into close contact with the part where film recording information is recorded, magnetic recording or reproduction can be performed reliably.In addition, the non-continuous part of the film can be placed in close contact with the magnetic head. Since there is no close contact, the life of the magnetic head can be extended, and since there is no contact between the discontinuous portion and the magnetic head, it is also possible to prevent the generation of dust due to scratches and the like.

[Brief explanation of the drawing]

The first section is a sectional view showing essential parts of the present invention. FIG. 2 is a schematic diagram of a film carrier embodying the present invention. FIG. 3 is an external view of the film carrier. FIG. 4 is a sectional view showing the state of the magnetic head and pressing band when passing through a discontinuous portion of the film. 10 ・ 0a 11 ・ 12 ・ 13 ・ 15 ・ Film/Discontinuous portion exposure window Film path Discontinuous portion detection sensor Information reading Magnetic head 18... Information writing Magnetic head 34, 42... Cam 40... Pressing Bad. Diagram

Claims (2)

[Claims] (1) In a magnetic recording and reproducing apparatus for photographic film for reproducing film recording information from a magnetic recording layer of a photographic film or recording film recording information on a magnetic recording layer using a magnetic head, the magnetic head is used to record the magnetic recording of a photographic film. A magnetic head displacing means for displacing the film into a state in close contact with the layer and a state in which this contact is released, a means for feeding the photographic film, a means for detecting a discontinuous portion during feeding of the photographic film, and a means for detecting a discontinuous portion by the discontinuity detection signal. Magnetic recording and reproducing of photographic film, characterized by comprising a control means for detecting the timing at which a discontinuous portion passes through a magnetic head, and controlling a magnetic head displacement means at the time of this passage to bring the magnetic head into a non-contact state. Device. (2) In a film carrier having a window for film observation or exposure, and a film path passing through the window, a sensor detects a discontinuous portion of the film at a portion adjacent to the film entrance of the film path with the window as a boundary. a magnetic reproducing head for reading film recording information recorded on the magnetic recording layer of the film; and a head displacement means for displacing the magnetic reproducing head into a state in which the magnetic reproducing head is in close contact with the magnetic recording layer of the photographic film and in a state in which this contact is released. a magnetic recording head for recording print information on the magnetic recording layer of the film, and a magnetic recording head in close contact with the magnetic recording layer of the photographic film at a portion of the film exit side of the film path with the window as a boundary; , and a head displacement means for displacing the contact to a state where the close contact is released, and controlling each head displacement means to move each head when the discontinuous portion passes through each head based on the detection signal of the discontinuous portion. A film carrier characterized in that it is provided with a control means for releasing the close contact state.