JPH04135752U - Negative mask device for photo printing machine - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the efficiency and economy of printing work in which a portion of negative film is trimmed and printed. [Structure] A gauge fitting part 2 is provided on the upper surface of the mask stand 1. A transparent plate 5 is provided in an exposure opening 4 provided in communication with the gauge fitting part 2. Several types of trimming gauges 1 having an opening 16 for trimming and having different sizes of the opening 16
Prepare 5. A negative film F to be trimmed and printed is placed on the transparent plate 5, and a trimming gauge 15 suitable for trimming and printing is fitted into the gauge fitting part 2 to remove the negative film F.
The trimming portion is aligned with the opening 16 of the gauge 15, and the trimming gauge 15 is pressed with a presser plate 10 of a negative presser arm 7 swingably provided above the mask stand 1 to perform baking.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea involves trimming and printing a portion of a single frame of negative film. The present invention relates to a negative mask device for a photographic printing machine used when printing.

0002

[Conventional technology]

A negative film is set between the light source and the lens, and the negative film is irradiated with light. A photo printing machine that prints the image projected by a lens onto photographic paper for enlargement. Normally, negative film is placed on a mask table installed on the exposure axis. The negative film is pressed onto a mask table to perform exposure work.

0003 There are two types of printing work: printing and exposing an entire frame of negative film, and exposing one frame of negative film to light. There are cases where a portion of the inside is printed and exposed, so-called trimming printing.

0004 When performing trimming printing, conventionally multiple masks with different exposure aperture sizes were used. Select the mask stand with the best opening for trimming baking from among the stands, and use that mask. The stand is set in a printing machine to perform the printing process.

[0005]

[Problem that the idea aims to solve]

Conventionally, as mentioned above, the mask stand was replaced and trimming was performed, so We have a wide variety of negative mask stands that are very time-consuming to attach and require high processing precision. There is also a problem with economic efficiency as it requires a lot of energy.

[0006] Furthermore, when performing trimming printing, place the negative film over the opening of the negative mask stand. If the printed area is on the edge of the negative film because it is necessary to place the printed area on the However, since it was not possible to cover all of the above openings with negative film, it was necessary to print with trimming. There are cases where it is not possible.

[0007] This idea solves the above-mentioned conventional inconveniences and improves the printing process when printing trimming. The aim is to improve efficiency and economy, and ensure that any part of the negative film can be touched. The technical challenge is to make it possible to grill the rimming.

[0008]

[Means to solve the problem]

In order to solve the above problem, this invention has a gauge on the top of the mask stand. A fitting part is formed, an exposure opening is provided in communication with the bottom surface of the gauge fitting part, and an exposure opening is provided in the opening. Attach the transparent plate and attach the negative presser arm installed above the mask stand to the top of the mask stand. It is movably supported by the negative presser arm, and has a light-transmitting window. The presser plate is supported by the negative presser arm, and is removably set in the above gauge fitting part. A trimming opening is provided on the plate-shaped trimming gauge, and the size of the opening is We adopted a configuration that includes several different types of trimming gauges.

[0009] Then, align the printed part of the negative film with the opening of the trimming gauge. To facilitate installation, a hole is formed on the bottom of the gauge fitting part, and a slider is inserted into the hole. The protrusion inserted in the hole is supported by an elastic body, and the upper part of the protrusion that protrudes upward from the hole is trimmed. I try to support the running gauge.

0010 Here, the gauge fitting part and trimming gauge can be either rectangular or square. good. If you make it square, the opening of the trimming gauge can be set horizontally or vertically. The trimming gauge can be set on the gauge fitting part by The number of gauges can be reduced.

[0011]

[Effect]

When printing negative film with trimming, the trimming area and size must be equal. Select a trimming gauge with an opening and insert the trimming gauge into the gauge fitting part. Set the trimming gauge inside the trimming gauge, and position the negative film previously placed under this trimming gauge. After adjusting the position and aligning the trimming area with the opening of the trimming gauge, Press down the trimming gauge with the presser plate of the presser arm to perform baking.

0012

【Example】

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

[0013] As shown in FIGS. 1 to 5, the upper surface of the mask stand 1 has a gauge fitting part 2 and its gauge. A film fitting groove 3 that crosses the page fitting part 2 and extends from one side of the mask stand 1 to the other side. and is provided.

[0014] Further, the mask stand 1 is provided with an exposure opening 4 that communicates with the bottom of the gauge fitting part 2. I'm being kicked. A transparent plate 5 made of a glass plate or the like is attached to the top of the opening 4. The top surface of the transparent plate 5 is at the same height as the bottom surface of the gauge fitting part 2 and the film fitting groove 3. is maintained. In addition, on the lower surface of the transparent plate 5, printing etc. is applied to the outer periphery excluding the center part. A light-shielding film 6 is provided through a means for providing light.

[0015] The negative presser arm 7 provided on the mask stand 1 has a hinge 8 on the outer periphery of the upper surface of the mask stand 1. One end is swingably attached via the .

[0016] A square hole 9 is formed in the negative presser arm 7 so as to face the exposure opening 4. A press plate 10 is provided below the square hole 9.

[0017] A light-transmitting window 11 is formed in the holding plate 10 so as to face the opening 4 . Also, A pair of pins 12 are provided on both sides of the upper surface of the presser plate 10, and each pin 12 is attached to a negative presser plate. It is slidably inserted into the pin holes 13 formed on both sides of the square hole 9 of the arm 7 and is prevented from coming out. There is a spring 14 on the outside of the pin 12 that presses the presser plate 10 downward. It is provided. The negative film F to be trimmed and printed is placed on the transparent plate 5. A plate-shaped trimming gauge 15 is placed in the gauge fitting part 2 and is detachably set therein. be held down by

[0018] A trimming aperture 16 is formed in the trimming gauge 15, and the aperture 16 When the trimming gauge 15 is set in the gauge fitting part 2, the position of the mask stand 1 is Coincides with opening 4. This trimming gauge 15 has a number of openings 16 of different sizes. Various types are available, and each trimming gauge 15 has the lens magnification of the enlarger lens. The input value is written.

[0019] Here, the gauge fitting part 2 and the trimming gauge 15 are square, and the trimming gauge 15 is square. Trim the opening 16 of the trimming gauge 15 in the horizontal and vertical directions. 5 can be set.

[0020] Although not shown in the example, the trimming gauge was designed to be easily handled. , a handle may be provided at the end of the trimming gauge.

[0021] Holes 17 are provided at the four corners of the bottom of the gauge fitting portion 2 where the trimming gauge 15 is set. are formed, and a pair of protrusions 19 provided at both ends of the leaf spring 18 are formed in the pair of left and right holes 17. It is inserted so that it can slide freely.

[0022] The protrusion 19 is formed by attaching the central part of the leaf spring 18 to the lower surface of the mask stand 1. The upper part is held in a state of protruding upward from the hole 17.

[0023] Now, for example, when printing by trimming the shaded area a of the negative film F shown in FIG. If so, choose one of several types of trimming gauges 15 with the same size as the shaded area a above. A trimming gauge 15 with a mouth 16 is selected.

[0024] Then, the negative film F is placed on the transparent plate 5, and the trimming gauge 15 is Fit into the screw fitting part 2, and trim the diagonal line part a by adjusting the position of the negative film F. the opening 16 of the holding gauge 15.

[0025] At this time, the trimming gauge 15 protrudes upward from the hole 17 of the mask stand 1. supported by the protrusion 19, the lower surface of the trimming gauge 15 and the upper surface of the transparent plate 5 Since the required gap is formed between the two, the position of the negative film F can be easily adjusted. I can do that.

[0026] After adjusting the position of the negative film F as described above, the mark on the trimming gauge 15 Input the lens magnification input value into the setting section of the printing machine, and pull down the negative presser arm 7 by hand. , elastically press down the trimming gauge 15 with the holding plate 10, and press the trimming gauge 15 down elastically. The negative film F is pressed against the transparent plate 5 using a screw 15. Perform the baking work in this state. cormorant.

[0027] Although not shown in the embodiment, the negative presser arm 7 has upward elasticity. By releasing the pressure of the negative presser arm 7 after the printing operation, the negative The presser arm 7 can be flipped upward.

[0028]

[Effect of the idea]

As described above, in the negative mask device according to this invention, the mask stand can be replaced. You can change the trimming range by simply replacing the trimming gauge without having to worry about Therefore, the printing work can be carried out extremely efficiently.

[0029] In addition, by preparing several types of trimming gauges with different opening sizes, It is possible to handle various types of trimming with different ranges and positions. It is economical compared to the case where several types of mask stands are available.

[0030] Furthermore, the negative film is supported by a transparent plate attached to the opening of the mask stand. Therefore, any part of the negative film can be trimmed and printed.

[0031] In addition, trimming is possible with protrusions that can be retracted from the holes formed at the four corners of the bottom of the gauge fitting part. A gap is formed between the gauge and the top surface of the transparent plate. This makes it easy to adjust the position of the negative film.

[0032] Furthermore, by making the gauge fitting part and the trimming gauge square, With one trimming gauge, you can trim both horizontally and vertically. The number of trimming gauges to be prepared can be halved. Ru.

[Brief explanation of drawings]

[Fig. 1] A plan view showing an embodiment of a negative mask device according to this invention.

[Figure 2] Cross-sectional view taken along line II-II in Figure 1

[Figure 3] Cross-sectional view taken along line III-III in Figure 1

[Figure 4] Cross-sectional view taken along line IV-IV in Figure 1

[Figure 5] Exploded perspective view of the same as above

[Figure 6] Plan view of negative film

[Fig. 7] A plan view showing the printing state of the above negative film.

[Explanation of symbols]

1 Mask stand 2 Gauge fitting part 3 Film fitting groove 4 Aperture 5 Transparent plate 7 Negative presser arm 10 Holding plate 11 Translucent window 15 Trimming gauge 16 Aperture 17 hole 19 Protrusion

Claims (3)

[Scope of utility model registration request] 1. A gauge fitting part is formed on the top surface of the mask stand, and an exposure opening is provided in communication with the bottom surface of the gauge fitting part,
A transparent plate is attached to the opening, a negative presser arm provided on the upper side of the mask stand is movably supported with respect to the upper surface of the mask stand, and a presser is provided on the lower side of the negative presser arm and has a transparent window. A photograph in which a plate is supported by a negative presser arm, a plate-shaped trimming gauge is removably set in the gauge fitting part, and has an opening for trimming, and several types of trimming gauges with different opening sizes are provided. Printing machine negative mask device. 2. A negative mask device for a photographic printing machine according to claim 1, wherein a hole is formed in the bottom surface of the gauge fitting part, and elasticity of an elastic body is imparted to the protrusion slidably inserted into the hole. A negative mask device for a photographic printing machine in which the upper part of the protrusion protrudes upward from the hole. 3. The negative mask device for a photo printer according to claim 1, wherein the gauge fitting portion and the trimming gauge are each square.