JP2511531B2 - Photo printing equipment - Google Patents

Description

The present invention relates to a photographic printing apparatus, and more particularly to a photographic printing apparatus that prints negative films of different sizes.

[Conventional technology]

The photographic printing apparatus irradiates a negative film set on a film carrier with printing light from a light source, and projects the frames recorded on the negative film onto a printing paper by a printing lens. In such a photo printing apparatus, the type of negative film used is 135 types, 120 types.
Since there are types, 110 types, etc., a film carrier is selectively used depending on the type of film.

Further, a mirror box and a diffusion plate are used in order to prevent image unevenness that occurs during photo printing.
In a general photo printing device, a diffusion plate made of, for example, a milky white acrylic plate is fixed to both open ends of the mirror box,
It is commonly used regardless of the type of film.

However, it is preferable to use a diffusing plate having a low diffusivity for the 110 type and the film film because the baking ratio is large, and to use a diffusing plate having a low diffusivity for the 135 type and 120 type. Therefore, a device has been proposed in which a plurality of diffusion plates having different diffusivities are freely placed in and out between the light source and the mirror box, and the diffusion plates are switched according to the type of film (63-60441). .

[Problems to be Solved by the Invention]

However, in the above-mentioned conventional photographic printing apparatus, when the film type is changed, it is necessary to replace the diffusion plate together with the film carrier, which is troublesome to operate.

[Object of the Invention]

The present invention has been made in view of the above points, and an object thereof is to improve the operability when changing the size of a negative film in a photo printing apparatus.

[Means for solving the problem]

In order to achieve the above object, the present invention is provided with a diffusing plate having diffusivity according to the size of the negative film, fixed to the corresponding film carriers.

[Action]

Since the present invention is configured as described above, when changing the size of the negative film, if the film carrier is converted, the diffuser plate can be replaced together with it, and it is necessary to replace the diffuser plate each time. Disappear.

〔Example〕

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 shows a schematic structure of a photographic printing apparatus according to an embodiment of the present invention. In the figure, the printing light L emitted from the light source 10 passes through the diffusion plate 13 and the mirror box 12, and after passing through the diffusion plate 14, the film carrier 16
Irradiate the negative film 18 supported by.

The printing light L transmitted through the negative film 18 is a printing lens 28.
After passing through the sheet, it reaches the photographic paper 32 whose print range is restricted by the paper mask 30.

As shown in FIG. 1, the film carrier 16 comprises a carrier body 19, a film mask 24 and a crimping plate 26, the carrier body 19 is positioned on the printer desk 22 by the pins 20, and the crimping plate 26 is used for the film mask.
Supports the negative film 18 on 24. Further, an opening 27 for passing the printing light L is formed in the center of the carrier body 19, and the diffusion plate 14 is fixed to the lower end. The film carrier 16 corresponds to the size of the negative film 18, and includes a mask 24 having an opening that matches the size and shape of the frame.

Like the film carrier 16, the diffusing plate 14 also corresponds to the size of the negative film 18, and when the negative size is large, the light transmittance is small, and when the negative size is small, the light transmittance is large. Each is set.

The inner surface of the mirror box 12 is a mirror surface,
A diffusing plate 13 having a predetermined transmittance is fixed to the lower surface, and the baking light L diffused in all directions by the diffusing plate 13 is used as a mirror box.
By reflecting the light within 12, the intensity of the printing light L is made uniform.

Next, the operation of the embodiment configured as described above will be described.

First, the film carrier 16 corresponding to the negative film 18 to be printed is set on the printer desk 22. At this time, the pin 20 is inserted into the hole of the printer desk 22 to position the film carrier 16. Next, the negative film 18 is set on the film mask 24, and the film is pressed by the pressure plate 26 from above.

When the printer start operation is performed after setting the negative film 18, the printing light L emitted from the light source 10 enters the diffusion plate 14 after passing through the diffusion plate 13 and the mirror box 12. The diffusion plate 14 diffuses the baking light L with the light transmittance set according to the negative size. in this way,
In the present embodiment, since the light transmittance of the diffusion plate 14 is set according to the negative size, it is possible to always maintain appropriate illumination light quantity and illuminance uniformity.

Then, the negative film 18 and the photographic printing paper 32 are moved frame by frame in the direction of the arrow, and the negative film 18 is illuminated by the printing light L diffused by the diffusion plate 14, and the negative lens 18 acts on the negative film 18. Images on photographic paper 32
Bake on.

After that, when changing the size of the negative film 18, remove the film carrier 16 from the printer desk 22,
Film carrier 16 for the negative film to be printed next
Is newly set on the printer desk 22 and printing is performed in the same manner as the previous time. At this time, the diffusion plate 14 is attached to the film carrier 16
Since the film carrier 16 is fixed, the diffusion plate 14 is also replaced at the same time when the film carrier 16 is replaced.

In the above embodiment, the diffusion plate 14 is fixed to the film carrier 16, but in the apparatus for converting the film mask according to the frame size, the diffusion plate 14 is fixed to the film mask. You can also

〔The invention's effect〕

As described above, in the present invention, since the diffusing plate having the diffusivity according to the size of the negative film is fixed to the corresponding film carriers, the diffusing plate is changed one by one when changing the size of the negative film. There is an effect that the operability can be improved without the need for replacement.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure around a film carrier according to an embodiment. FIG. 2 is a schematic view showing the arrangement of a photographic printing apparatus according to an embodiment of the present invention. 10 …… Light source 14 …… Diffuser 16 …… Film carrier 18 …… Negative film 28 …… Baking lens 32 …… Print paper.

Claims (1)

(57) [Claims] 1. A photographic printing apparatus, comprising a plurality of film carriers according to the size of a negative film, for printing an image on a negative film, which is guided by the film carrier by light emitted from a light source, onto photographic paper. A photographic printing apparatus characterized in that a diffusion plate having a diffusivity corresponding to the size of a negative film is fixedly provided on the light source side of the corresponding film carrier.