JPH04257846A - Film carrier - Google Patents

Abstract

PURPOSE:To prevent dust, etc., from sticking to a glass plate by blowing off the dust by means of exhaust, to improve the flatness of a film by sticking a film 13 to a glass plate 12 by means of the intake of air and further pressing the film 13 by means of a glass plate 14, and to prevent the occurrence of an interference fringe with reflection preventing films 12a and 14a. CONSTITUTION:The glass plate 12 is arranged on an exposure aperture 11. Air intake ports 20 and 21 and an exhaust port 22 are provided on a base main body 10. The glass plate 14 and an exhaust port 27 are provided on a film pressing plate 15. The reflection preventing films 12a and 14a are formed on the glass plates 12 and 14. Respective air intake ports 20 and 21 and the exhaust ports 22 and 27 are connected with a pump 33 via solenoid valves 28 and 29. While the film is fed, the air is blown via solenoid valves 28 and 29 from the exhaust ports 22 and 27. On the other hand, when printing exposure is carried out, the air is sucked from the air intake ports 20 and 21 through the solenoid valves 28 and 29.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film carrier for printing photographic prints.

In order to ensure the flatness of the film, in the film carrier, each frame of the film to be printed is pressed against the base body by a presser frame. Furthermore, in the case of large-sized films such as Brownie size, a glass plate is placed in the exposure aperture of the film carrier, a negative pressure is created between the glass plate and the film, and the negative film is adsorbed to the glass plate. It is also done to ensure flatness.

0003

Incidentally, in recent years, films have been proposed in which photographic information and the like are recorded on a recording medium such as a magnetic recording layer of the film. If such information recording film is cut into film pieces every 4 to 6 frames like conventional film, the information may also be separated.
Undesirable. Therefore, it is conceivable to wind up one roll of film into a cartridge, store it in a cartridge, and return it to the user without cutting the film. In this case, since the film is wound and stored in the cartridge for a long period of time, the curl becomes strong. Therefore, if such a film is simply sandwiched between glass plates, a gap will be created between the glass plate and the film, and Newton's rings (interference fringes) will appear due to reflection from the glass plate, resulting in image deterioration of the printed photograph. In addition, in order to prevent this, when a negative film is adsorbed to a nano-glare glass plate such as a large-sized film, it is necessary to fit the nano-glare glass plate into the exposure aperture, and this glass plate blocks the exposure aperture. become a state. For this reason, dust and dust may adhere to the nano glare glass plate. In addition, the attached dust remains on the glass plate and is printed without being removed, leaving traces on the print and causing print defects.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a film carrier that improves the flatness of the film and prevents printing defects caused by dust, etc. .

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a glass plate disposed in an exposure aperture, an anti-reflection film formed on a side surface of the glass plate in contact with a film,
There is a base body that holds the glass plate, an air intake port provided on the base body, and an air outlet provided on the base body. During printing exposure, air is sucked in from the air intake port, and when film is fed, air is aired from the air outlet port. The film carrier consists of a means for discharging the . Another invention provides a film holding frame disposed above the exposure aperture, a glass plate disposed in the opening of the holding frame, and an anti-reflection film formed on the film contacting surface of the glass plate. The film holding frame is also provided with an air outlet.

[0006]

[Operation] During printing exposure, air is sucked in from the air suction port. As a result, the film is attracted to the glass plate on which the antireflection film is formed, and its flatness is ensured. Moreover, since the film is sandwiched between the glass plates, even more flatness is ensured. The antireflection film lowers the reflectance of the glass surface and prevents interference fringes from occurring. Furthermore, when the film is being fed for purposes other than printing exposure, air is blown out from the air outlet to blow away dust and the like between the glass plate and the film, thereby preventing dust and the like from adhering to the film and glass. This eliminates printing defects due to dust and the like.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an exposure opening 11 is formed in a base body 10, and a glass plate 12 is attached to this exposure opening 11. An antireflection film 12a is formed on the surface of the glass plate 12 that comes into contact with the film, and can prevent surface reflection of the glass. Further, above the exposure aperture 11, a film holding frame 15 is arranged. A glass plate 14 is also attached to the opening 15a of the film holding frame 15, and an antireflection film 14a is similarly formed on the surface that comes into contact with the film. These antireflection films 12a and 14a reduce the reflectance over the entire visible light range, but are composed of multilayer films in which the reflectance of glass becomes minimum in the vicinity of λ=410 nm.

The film holding frame 15 is attached to an elevating frame 17 via a guide rod 16 so as to be movable up and down. A coil spring 18 is attached to the guide rod 16 to urge the holding frame 15 downward. Further, a solenoid 19 is attached to the lifting frame 17, and this solenoid 19
moves the lifting frame 17 downward when pressing the film. As a result, as shown in FIG. 2, the holding frame 15 presses the negative film 13 against the base body 10.

As shown in FIG. 3, several to several dozen air intake ports 20 and 21 are provided in the base body 10 at positions close to the short side 11a of the exposure opening 11. These intake ports 20 and 21 are formed at a predetermined pitch in the width direction of the film within the range in which the holding frame 15 presses the film 13. The base body 10 also includes several to several dozen exhaust ports 22 arranged in a position close to the intake port 20 on the film inlet side.
is formed. The exhaust ports 22 are also formed at a predetermined pitch in the film width direction. Similarly, as shown in FIG. 1, an exhaust port 27 is also formed in the holding frame 15.

As shown in FIG. 3, the intake ports 20 and 21 are communicated with each other by a passage 23, and an intake tube 24 is connected to the passage 23 via a connecting fitting 24a. Further, each exhaust port 22 is also communicated with each other by a passage 25.
An exhaust tube 2 is connected to this passage 25 via a connecting fitting 26a.
6 is connected. As shown in FIG. 1, the exhaust tube 26 is branched in the middle, and this branch tube 26b
is connected to the exhaust port 27 on the holding frame 15 side. Each tube 24, 26 is connected to a solenoid valve 28, 29. These solenoid valves 28 and 29 have tubes 30 and 31.
A pump 33 is connected via. Solenoid valve 28, 29
is controlled by a controller 35. Solenoid valve 28,
29 is normally set at a position where air is blown out from the exhaust ports 22, 27 by the urging of coil springs 28a, 29a. As shown in FIG. 2, during printing exposure, the controller 35 turns on the solenoids 28b and 29b in response to the film press signal, switches the valves, and sets the valves to positions where air is sucked out from the respective intake ports 20 and 21. The controller 35 also turns on the film holding solenoid 19 to lower the elevating frame 17 and press the holding frame 15 around the frame to be printed.

The base body 10 is also provided with a pair of film feed rollers 40 and 41, which set the frame of the film to be printed at the exposure position. This frame advance is
As is well known, in the case of a film with a notch, the notch is detected by a notch sensor 42, and after this detection, the film is fed by a fixed amount. In addition to notch detection, by detecting the edge of the frame to be printed using an edge sensor, etc., the frame to be printed can be placed at the exposure aperture 1.
It may be positioned at 1. After positioning the frame to be printed in the exposure aperture 11, the controller 35 issues a film pressing signal, which turns on the holding solenoid 19 and the solenoids 28b and 29b of the solenoid valves 28 and 29.
Make it.

Next, referring to the flowchart of FIG.
The operation of this embodiment will be explained. The film carrier of this embodiment is used by being set at the exposure position of the printer. When the negative film 13 is set on the film carrier and an instruction is given to start printing, the controller 35 turns on the pump 33, as shown in FIG. As a result, solenoid valve 2
Air is blown out from the exhaust ports 22, 27 via the exhaust ports 8, 29. As a result, even if dust or the like enters between each glass plate 12, 14 and the film 13, it can be blown away.
Dust and the like are prevented from adhering to these. After the frame is set, the solenoid valves 28 and 29 are turned on, and the exhaust mode is switched to the intake mode. As a result, air blowing from the exhaust ports 22 and 27 is stopped, and air is sucked in from the intake ports 20 and 21. This intake creates a negative pressure between the glass plates 12, 14 and the film 13, and the film 13 comes into close contact with the glass plate 12 on the base body side, ensuring flatness. Also, at the same time as the solenoid valves 28 and 29 are switched, the solenoid 19 of the lifting frame 17 is turned on, and the holding frame 15 is turned on.
lower. As a result, the periphery of the frame to be printed on the film 13 is biased by the coil spring 18 to the base body 1.
Pressed down to 0. Therefore, the flatness of the film 13 is ensured. Thereafter, the printing exposure section of the printer operates to print and expose the image of the frame to be printed onto the color paper. Thereafter, the next frame to be printed is set at the exposure position by repeating the same process.

Note that in the above embodiment, the glass plates 12, 1
4 with antireflection films 12a and 14a formed thereon is used, but in addition to this, nano-glare glass may be used. Further, in the above embodiment, each intake port 20, 21, exhaust port 22,
27 are arranged in a straight line, but they may be arranged in a zigzag pattern. Further, the exhaust ports 20 and 27 may be formed to be inclined in the film feeding direction, and in this case, the air blowing direction can be unified, so that dust and the like can be efficiently removed. Further, when the glass plate 14 is attached to the film holding frame 15, an exhaust port 50 may also be formed on the upper surface side of the glass plate 14, as shown in FIG. In this case,
Dust and the like are prevented from adhering to the upper surface of the glass plate 14.

[0014]

[Effects of the Invention] As explained above, according to the present invention,
The air intake port is provided to suck out the air between the film and the glass plate during printing exposure and bring the film into close contact with the glass plate, so that the flatness of the film can be ensured. Moreover, since an anti-reflection film is formed on each glass plate, interference fringes are prevented from occurring. Also, when feeding the film, etc.
Since air is blown out from the exhaust port, it is possible to blow away dust and the like that have entered between the film and the glass plate, thereby preventing dust and the like from adhering thereto. This makes it possible to place a glass plate in the exposure aperture of the film carrier, thereby ensuring better flatness and eliminating print defects such as dust appearing on the photograph. Furthermore, since a glass plate is also provided on the film holding frame side, the flatness of the film can be further ensured.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the main parts of a film carrier.

FIG. 2 is a schematic diagram showing the state of close contact of the film.

FIG. 3 is a plan view showing the main parts of the film carrier.

FIG. 4 is a flowchart showing a processing procedure for a film carrier.

FIG. 5 is a sectional view showing another embodiment of the film carrier.

[Explanation of symbols]

10 Base body 11 Exposure aperture 12, 14 Glass plate 13 Negative film 15 Film holding frame 20, 21 Intake port 22, 27, 50 Exhaust port 28, 29 Solenoid valve 33 Pump

Claims (2)

[Claims] 1. A glass plate disposed in an exposure aperture, an antireflection film formed on a side surface of the glass plate in contact with the film, a base body holding the glass plate, and an air suction port provided in the base body. A film carrier comprising: an air outlet provided in the base body; and means for sucking in air from the air inlet during printing exposure and discharging air from the air outlet during film feeding. 2. A glass plate disposed in the exposure aperture, an antireflection film formed on the film contact surface of the glass plate, a base body holding the glass plate, and a film disposed above the exposure aperture. A holding frame, a glass plate disposed in the opening of the holding frame, an anti-reflection film formed on the film contact surface of the glass plate, an air suction port provided on the base body, and an air intake port provided on the base body and the film holding frame. Air is sucked in through the provided air outlet and the air intake port during printing exposure, and the film is held between the glass plate of the base body and the glass plate of the film holding frame, and when the film is fed, the glass plate of the base body and the film are A film carrier characterized in that it has a means for releasing the glass plate of the Japanese frame and discharging air from an air outlet.