JP2853560B2 - Photo printing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a photographic printing apparatus capable of reading and writing a magnetic recording portion of a negative film.

[0002]

2. Description of the Related Art A photographic printing apparatus is configured to perform scanning and printing by intermittently feeding a negative film. In such a photographic printing apparatus, when reading or writing information in the magnetic recording portion of the negative film, the transport speed of the negative film needs to be constant to prevent erroneous reading.

Therefore, in a conventional photographic printing apparatus, a negative film loop forming section is provided between an exposure stage and a magnetic head in order to perform operations such as exposure and reading in parallel. However, such a conventional apparatus requires a space for arranging the loop forming section, and thus has a problem that the apparatus is increased in size and the space in a small-scale developing laboratory cannot be effectively used.

Further, as another conventional apparatus, a negative film is reciprocated and conveyed many times, and only the exposure / scanning operation is performed when the negative film is intermittently fed, and the magnetic information is transferred when the negative film is fed at a constant speed. A photographic printing apparatus configured to perform reading and writing has been proposed. However, with such a conventional apparatus, the loop forming section can be omitted. However, since the negative film must be reciprocated many times, there is a problem that the working time becomes longer and the negative film is damaged. Was.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to enable accurate reading of information without providing a loop forming section. In addition, it is an object of the present invention to provide a photographic printing apparatus which can perform reading and writing without reciprocating a negative film many times.

[0006]

A photographic printing apparatus according to the present invention comprises a transport path for reciprocating a negative film on which a magnetic recording section and a latent image information section are formed for each frame between a carry-in port and a carry-out port. In a photographic printing apparatus having an exposure unit disposed in the middle of the transport path, a read magnetic head, a write magnetic head, and an optical sensor provided along the transport path,
The read magnetic head, write magnetic head, and optical sensor are arranged in this order from the entrance to the exposure unit, and the distance between the center of the read magnetic head and the exposure center of the exposure unit is set to a positive integer multiple of one frame pitch of the negative film. Set the distance so as to add a half-frame pitch, and
The distance between the center of the
Half frame pitch to positive integer multiple of 1 frame pitch of ga film
When feeding the negative film intermittently toward the exit, read the information of the negative film with the read magnetic head and optical sensor, and continuously feed the negative film toward the entrance. It is characterized in that the information is written in the magnetic recording section by the write magnetic head when the paper is reversely fed.

[0007]

According to the photographic printing apparatus of the present invention, the distance between the center of the read magnetic head and the exposure center of the exposure unit is
An optical sensor that is set to be a distance obtained by adding a half frame pitch to a positive integer multiple of one frame pitch of a negative film
Adjust the distance between the center of the
The half frame pitch is added to a positive integer multiple of the film's one frame pitch.
When the intermittent feed of the negative film is stopped, the center of the frame of the negative film coincides with the exposure center of the exposure unit, and the read magnetic head and optical sensor detect the non-information between the information units. ing to be located in part. Therefore, during the intermittent feeding operation, the magnetic recording portion for one frame continuously passes through the read magnetic head, so that the magnetic recording portion can be stably read. In addition, when the negative film is continuously fed backward after reading the magnetic information, the magnetic recording portion of the negative film continuously passes the write magnetic head, and stable writing can be performed on the magnetic recording portion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A photographic printing apparatus has a transport path 5 for transporting a negative film 2 on which a magnetic recording section 1 and a latent image information section 10 are formed from an entrance 3 to an exit 4, and in the middle of the transport path 5. An exposure unit 6 is provided, and a read magnetic head 7, a write magnetic head 8, and an optical sensor 9 are provided between the exposure unit 6 and the entrance 3. The read magnetic head 7, the write magnetic head 8, and the optical sensor 9 are arranged in the order of the read magnetic head 7, the write magnetic head 8, and the optical sensor 9 from the carry-in port 3 toward the exposure unit 6 (FIGS. 1 and 2). .

A pair of transport rollers 5a is disposed near the entrance 3 of the transport path 5, and a pair of transport rollers 5b closer to the entrance 3 and a pair of transport rollers 5c closer to the exit 4 than the exposure unit 6. It is arranged. Conveyance roller pair 5a, 5b, 5c
Are configured to be synchronously driven to rotate by a motor M via a transmission means T.

The transport path 5 forwards the negative film 2 from the carry-in port 3 to the carry-out port 4 by forward rotation of the motor M, and transports the negative film 2 by the reverse rotation of the motor M.
To the carry-in port 3 in the reverse direction. And
At the time of forward feeding, the negative film 2 is intermittently fed to the exposure unit 6 for each frame, and at the time of reverse feeding, the negative film 2 is fed.
Is continuously sent to the carry-out port 4 at a constant speed.

FIG. 4 is a plan view of the negative film 2. The magnetic recording portion 1 of the negative film 2 is formed on one side of the negative film 2 for each frame 2a. The date and time of shooting are described. Perforations 2b are formed on one side of the negative film 2, and these perforations 2b are located at both ends of each frame 2a, and the magnetic recording unit 1 is located between the perforations 2b. On the other side of the negative film 2, a latent image information section 10 such as a bar code is provided corresponding to each frame 2a.
Are formed.

The read magnetic head 7 is used for the negative film 2.
For reading information recorded in the magnetic recording section 1 of the first embodiment, and is disposed on both sides of the transport path 5 between the carry-in port 3 and the exposure section 6. It is connected to the controller 12. The distance L1 between the center C2 of the read magnetic head 7 and the center C1 of the exposure unit 6 is set to be a distance obtained by adding a half frame pitch to a positive integer multiple of one frame pitch of the negative film 2, and is shown in FIG. In the example, the distance is set to 2.5 frames.

The write magnetic head 8 is for writing data to the magnetic recording section 1 of the negative film 2,
The write magnetic head 8 is disposed on both sides of the transport path 5 between the controller and the exposure unit 6, and is connected to a controller 12 via a write circuit 13.

The optical sensor 9 has a perforation 2
b, for reading the latent image information section 10, which is disposed between the read magnetic head 7 and the exposure section 6, and the optical sensor 9 is connected to the controller 12 via the amplifier circuit 9a. The distance L2 between the center C3 of the optical sensor 9 and the center C1 of the exposure unit 6 is equal to 1 of the negative film 2.
The distance is set to be a distance obtained by adding a half frame pitch to a positive integer multiple of the frame pitch. In the illustrated embodiment, the distance is set to 1.5 frame pitch. Therefore, the distance L3 between the center C3 of the optical sensor 9 and the center C2 of the reading magnetic head 7 is a distance of one frame pitch. Note that a keyboard 17 and a display 18 are connected to the controller 12.

The exposure section 6 prints the frame 2a of the negative film 2 provided on the exposure stage 6a on a photographic paper (not shown) with a light source.

FIG. 3 shows the relationship between the feed speed v of the intermittent feed of the negative film 2 and the time t, where t1 is a feed section of one frame, t2 is a section of a constant speed, and t3 is a start of feed of the frame feed. , T4 indicates a deceleration section for stopping frame feed, and t5 indicates a stop section for feed operation. The magnetic recording unit 1 includes the read magnetic head 7 and the optical sensor 9.
The reading of the latent image information section 10 is performed in a section t2 at a constant speed during the one-frame feed operation.

At both ends of the transport path 5, a set portion 15 of the cartridge 14 and a film winding portion 16 are formed.
In the figure, reference numeral 17 denotes a film cleaner.

The photographic printing apparatus configured as described above can read information accurately by operating as follows.

(1) First, when pulling out the negative film 2 from the cartridge 14 and intermittently feeding it, the read magnetic head 7 and the optical sensor 9 read the magnetic information and latent image information of each frame 2a of the negative film 2.

(2) Next, when the negative film 2 is continuously reversely fed at a constant speed, the write correction head 8 writes the scanner correction data into the magnetic recording section 1 of the negative film 2.

(3) Next, when the negative film 2 is intermittently fed forward, print data is read by the read magnetic head 7 while printing, and it is checked whether or not the print data has an error.

(4) Next, when the negative film 2 is continuously reversely fed at a constant speed, data is written by the write magnetic head 8. This write data is data that was incompletely read at the time of the check in (4) or data obtained by manual correction.

Next, another operation pattern will be described.

(1) First, when pulling out the negative film 2 from the cartridge 14 and intermittently feeding it, the read magnetic head 7 and the optical sensor 9 read the magnetic information and the latent image information of each frame 2a of the negative film 2.

(2) Next, when the negative film 2 is continuously fed backward at a constant speed, the reading magnetic head 7 reads the magnetic recording section 1 again to check the first reading.

(3) Next, when the negative film 2 is intermittently forwarded, printing is performed by the exposure unit 6.

(4) Next, when the negative film 2 is continuously reversely fed at a constant speed, writing is performed by the write magnetic head 8. The write data is scanner data and correction data.

[0028]

As is clear from the above description, according to the photographic printing apparatus of the present invention, information can be read with high accuracy when performing exposure or scanning by intermittently feeding a negative film. In addition, the loop forming unit becomes unnecessary, and the size of the apparatus can be reduced. Moreover, since it is not necessary to reciprocate the negative film many times, the working time can be reduced, and the negative film is not damaged.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a photographic printing apparatus according to the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a diagram showing a relationship between intermittent feeding speed of negative film and time.

FIG. 4 is a plan view of a negative film.

[Explanation of symbols]

 Reference Signs List 1 magnetic recording section 2 negative film 3 carry-in port 4 carry-out port 5 transport path 6 exposure section 7 read magnetic head 8 write magnetic head 9 optical sensor 10 latent image information section

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) G03B 27/32 G03B 27/46

Claims (1)

(57) [Claims] 1. A transport path for reciprocating a negative film on which a magnetic recording section and a latent image information section are formed for each frame between an entrance and an exit, and an exposure section in the middle of the transport path. In the photographic printing apparatus provided with, the read magnetic head, write magnetic head, and optical sensor provided along the transport path are arranged in the order of the read magnetic head, the write magnetic head, and the optical sensor from the carry-in port toward the exposure unit. The distance between the center of the read magnetic head and the exposure center of the exposure unit is set to be a distance obtained by adding a half frame pitch to a positive integer multiple of one frame pitch of the negative film, and the center of the optical sensor and the exposure unit are set. Exposure center and
To a positive integer multiple of one frame pitch of the negative film
When the negative film is intermittently forwarded toward the exit by setting the distance to add the half-frame pitch, the negative film information is read by the read magnetic head and optical sensor, and the negative film is directed toward the entrance. Wherein the information is written to the magnetic recording section by the write magnetic head when the paper is continuously reversely fed.