JPS625245A - Exposing device - Google Patents

Abstract

PURPOSE:To uniformly expose a photosensitive film and to simplify the constitution of a device by providing a light source on the center line of a transparent cylindrical member, superposing a positive film and the photosensitive film on the cylindrical member and bringing the same into tight contact with each other by a press contact cover. CONSTITUTION:A fluorescent lamp 2 is provided to the center line of the transparent cylindrical member 4. The positive film 11 and the photosensitive film 10 are superposed on the member 4 from the inside. The films are united by the press contact cover 6 placed thereon and are wound onto the member 4. The free end 6a of the cover 6 is fixed by a fixture 7. The film 10 is exposed by the lamp 2 while the member 4 is rotated. The film 1 and the film 10 are removed after exposing. The film 10 is treated with warm water to elute the unexposed part, by which a screen printing plate or the like is obtd. This exposing device uniformly expose the film simply by using one light source in the above-mentioned manner. The device is thus simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an exposure apparatus. More specifically, the present invention relates to an exposure apparatus used when a plate used in screen printing or the like is made by a photochemical method.

[Prior Art] Conventionally, as a plate-making method for screen printing, a photocurable material (hereinafter referred to as a photosensitive agent) such as a diazo emulsion or diazo resin is uniformly applied to one side of a screen gauze and then dried. On the surface of the photosensitive film (hereinafter referred to as photosensitive film),
A positive film with a design etc. drawn on it is layered on a transparent film, and the film is exposed to light using an exposure device that uses a light source such as a fluorescent lamp.Then, the exposed and hardened part of the plate is left behind, and the unexposed part is left behind. A method of elution using a solvent such as warm water is known.

A conventional exposure device has a table for placing a photosensitive film and a positive film on a flat surface and moving them at a constant speed, and a table placed above the table at a fixed interval. It consists of a large number of light sources such as fluorescent lamps for exposing the photosensitive film.

As a light source for an exposure device used in conventional screen printing, for example, sunlight, a fluorescent lamp, a black light, a mercury lamp, etc. are used, and a fluorescent lamp is most commonly used.

[Problems to be Solved by the Invention] Light sources used in exposure apparatuses are generally linear light sources such as fluorescent lamps, or point light sources such as black lights, except for sunlight. Therefore, the distance from the light source to the photosensitive film spread out on a plane differs depending on the location on the photosensitive film. Therefore, in order to uniformly expose the photosensitive film, it is necessary to arrange a larger number of light sources and move the photosensitive film at a constant speed to average out the difference in exposure amount based on the difference in distance. Furthermore, conventional exposure apparatuses have only been used for business use, and these apparatuses employ, for mass production, a configuration in which, for example, a large number of photosensitive films are continuously moved and passed under the plurality of light sources.

Therefore, all conventional exposure apparatuses are extremely large-scale equipment, and there are no known simple ones that can be used personally or at home.

The present invention has been made in view of the above-mentioned circumstances, and is a method that enables uniform exposure of a photosensitive film with only one light source and is suitable for personal or household use.
The purpose is to provide an exposure apparatus that has a simple configuration and is inexpensive.

Means for Solving Problem E] The exposure apparatus of the present invention includes a cylindrical member made of a transparent material, a light source disposed on the center line of the cylindrical member, and an outer periphery of the cylindrical member that can be attached and detached in close contact with the cylindrical member. It consists of a crimp cover that can be covered.

[Function] When a photosensitive film is wrapped around the surface of a cylindrical member with the photosensitive agent side inside, and then the photosensitive film is fixed with a crimp cover, the distance between the light source and the photosensitive film becomes constant at every point on the photosensitive film. . When the light source is turned on in this state, the photosensitive film is uniformly exposed. Therefore, by using only one light source, it is possible to configure an exposure apparatus with a uniform exposure amount and high accuracy. As a result, an exposure apparatus with an extremely simple configuration can be manufactured.

[Example] Next, the exposure apparatus of the present invention will be explained with reference to the drawings, but the exposure apparatus of the present invention is not limited to these, and various modifications can be made without departing from the spirit of the invention. I can do it.

FIG. 1 is a partially cutaway perspective view showing an embodiment of the exposure apparatus of the present invention, and FIGS. 2 to 4 are a partially cutaway front view, a partially cutaway plan view, and a partially cutaway plan view of the exposure apparatus shown in FIG. 1, respectively. cutaway side view,
FIG. 5 is a sectional view of a main part showing a state in which a photosensitive film is attached to a cylindrical member, and FIG. 6 is an enlarged sectional view showing an example of a photosensitive film used in the exposure apparatus of the present invention.

In Figure 1, (1) is an elongated base, and at both ends of the base (1) there are holding parts (3) for holding the linear fluorescent lamp (2) at a constant height from the base (1). A transparent plastic cylindrical member (4) is placed around the fluorescent light (2) along a cylindrical surface with the center line (P) as the center of the fluorescent light (2). .

The cylindrical member (4) is slidably held at both ends by a receiver plate (51) and a receiver plate (5a) so that the cylindrical member (4) can rotate around the center line (P). The cylindrical member (4) is formed in a cross-sectional shape so as to be in contact with the end face and the upper side of the outer circumferential surface adjacent thereto, and the receiving plate (5a) is formed on the outer circumferential face near the end face of the cylindrical member (4). As a result, the cylindrical member (4) is prevented from moving in the axial direction, and the center Ml (P
) is rotatably supported around the Cylindrical member (4)
One end of the crimp cover (6) is fixed with a fixing tool (a knife), and the free m (6a) of the crimp cover (6) is removably attached to the fixing tool (forced with a magnet (8) or other adhesive means). It is configured so that

The exposure apparatus shown in FIGS. 1 to 4 is provided with a rigid main body cover (9) that can be detachably attached to the base (1) for convenient storage and portability. For example, the body cover (9) is elastically engaged with a member (16) through a hole (15) formed at the bottom of the body cover (9) and a tongue-like hook formed at the holding portion (3). .

In addition, (17) in Fig. 1 is a handle of the main body cover (9), and (18) is an operation panel equipped with an 0N-OFF switch (19), a frequency selection switch (20), and a glow lamp (21). .

Next, a method of using the exposure apparatus configured as described above will be explained.

First, after removing the main body cover (9), attach the free end (6a) of the crimp cover (6) to the fixture (7) as shown in Figure 5.
Remove the photosensitive film (10) from the cylindrical member (4) by superimposing the positive film (11) prepared in advance on the photosensitive film (10), and place one end of the film on the cylindrical member (4) so that the positive film (11) is on the inside.
and crimp cover (6), and then insert the photosensitive film (10
), the positive film (11) and the crimp cover (6) are wound together on the outer circumference of the cylindrical member (4), and the free end (6a) of the crimp cover (6) is fixed on the fixture (7). . In that case, since the cylindrical member (4) can be rotated around its center line (P) with appropriate sliding resistance, the work of attaching the photosensitive film (10), etc., is very easy. . After the installation work is completed, turn on the fluorescent light (
'2J is emitted to expose the photosensitive film (10).

Once the exposure is complete, reverse the steps above to remove the photosensitive film (10
) and the positive film (11).

Further, by treating the photosensitive film (10) with hot water or the like to elute the unsensitized photosensitizer, a plate for screen printing can be obtained.

In the exposure apparatus of the present invention, a light-sensitive emulsion such as a diazo emulsion, a light-sensitive emulsion such as a mixture of gelatin and iron salts, etc. It is also possible to use a general photosensitive film coated with a photosensitive agent such as a liquid or a photosensitive resin and dried. However, in order to enjoy screen printing on clothing, hobby accessories, mail, etc. at home or for personal use, for example, as shown in Figure 6, a synthetic resin film such as polyester or a film base material (12) such as paper is required. It is preferable that a photosensitive agent (13) and a screen gauze (14) are laminated in that order and adhered thereon.

When this film is used, the film base material (12) is peeled off, a positive film (11) is placed on top of the photosensitive agent (13), and the film is exposed as described above.

When selling the exposure apparatus of the present invention, in addition to such a laminated photosensitive film, colored ink, a simple plastic squeegee, a plastic screen frame for stretching and fixing the plate, materials for producing a positive film, etc. If sold as a set, they can be widely used as hobby prints and learning materials for general households.

[Effects of the Invention] The exposure apparatus of the present invention can easily perform uniform and highly accurate exposure by using only one light source,
This has the advantage that it can be used in an extremely wide range of applications.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the exposure apparatus of the present invention, and FIGS. 2 to 4 are a partially cutaway front view, a partially cutaway plan view, and a partially cutaway side view of the exposure apparatus shown in FIG. 1, respectively. 5 is a sectional view of a main part showing a state in which a photosensitive film is attached to a cylindrical member, and FIG. 6 is an enlarged sectional view showing an example of a photosensitive film used in the exposure apparatus of the present invention. (Raw chestnut symbols in the drawing) (21: Fluorescent lamp (4): Cylindrical member (S: Holder (6): Crimp cover (8): Magnet Figure 5, Figure 6

Claims (1)

[Scope of Claims] 1. Exposure consisting of a cylindrical member made of a transparent material, a light source arranged on the center line of the cylindrical member, and a crimp cover that can removably cover the outer periphery of the cylindrical member in close contact with the cylindrical member. Device. 2. The exposure apparatus according to claim 1, wherein the cylindrical member is rotatable around its center line, and the crimp cover is flexible. 3. The ends of the crimp cover can be attached to and detached from each other. 3. The exposure apparatus according to claim 2, further comprising an adhesion means for adhesion.