JPS5816224A - Sucking and holding method for film or the like - Google Patents

Abstract

PURPOSE:To suck a film, etc., easily by connecting an upper plate to a base plate, such as a glass plate, tightly except an air passage for discharging air from the side end of the film, and sucking air from the upper or lower plate. CONSTITUTION:An upper plate 2 punched to sheet film size is adhered while an air passage 4 is left, and air is discharged from the air discharge part 5 of the upper plate to suck air from suction holes 3 of a punched window at side ends. For this purpose, a negative plate is set in the punched window and while air leakage from the side ends of the film is prevented, a suction air pump is put in operation to discharge air remaining between the film and a glass surface, thereby sucking the negative plate to the glass surface tightly. In this case, a pressure plate for air leakage prevention is provided on the glass surface in a free opening and closing state to facilitate the suction and replacement of a film.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of adsorbing and holding a photographic film or the like onto any plywood such as a glass plate using air.

In other words, in operations such as photo enlarging, adhesion, plate making, duplication, etc., it is desirable that the negative original plate (including positives) be reliably kept flat, and the photosensitive material on the exposed side must also be reliably held flat. Yes, it goes without saying now. Further, in the contact printing operation, the negative original plate and the photosensitive material must be held in close contact with each other without causing any lifting.

The present invention can be applied to a wide range of applications, including the above-mentioned flatness and tight holding of films, etc. in photographic work, film registers, drafting and tracing, and display viewing of photographic films. The purpose of this study is to develop a method for achieving adsorption and retention using simple means that have not been previously achieved.

In order to achieve the object, the present invention attempts to solve the problem by the following means.

First, an example of a negative carrier for sheet film will be explained with reference to FIG.
Glue it so that it remains in place.

If the air is removed from the air exhaust part (2) on the upper plate, the air will be sucked in through the suction hole (2) at the side end of the punched window.

Therefore, the negative original was set in a punched window to prevent air leakage from the side edges of the film, and a suction air pump (not shown) was activated.

Air remaining between the film and the glass surface is expelled, allowing the negative original to be held tightly against the glass surface.

Air leakage from the side edges of the film can be prevented by masking tape, but by attaching the air leakage prevention presser plate shown in Figure 2 to the glass surface so that it can be opened and closed, the film can be quickly and easily replaced. It can be done. In the figure, ■ indicates a punched window, and ■ indicates a pressure rubber that presses the side edge of the film and the punched window side edge of the upper plate to prevent air leakage.

Figure 3 shows an example in which the upper plate is structured to press the three side edges of the film from above, and the film is inserted along the glass surface.In this case, the film is inserted on the right side. The cut holder is inserted from the 1st side and a holding plate (not shown) similar to a normal cut holder is used to prevent air leakage on the right side. By doing this, you can achieve your goal by holding down only one side.

Also, air leakage from the side edges of the film can be prevented by placing a pressure rubber (2) on the tip of the leaf spring (2) on the top plate, as shown in Figure 4.

It is also possible to have a structure in which the leaf spring opens and closes.

Next, an example for roll film will be explained with reference to FIG. The roll film can be adsorbed by using the holding plate shown or by arranging the leaf spring shown in FIG. 4 to prevent air leakage 11-7.

In addition, in Fig. 4, by using a presser plate that allows the left and right pressure rubbers to be freely moved, for example, 1
For 20, one unit can easily pick up films cut into one frame of 6x9, 6x7° and 6x6 sizes.

In addition, a thin steel plate is placed in the area that corresponds to the adhesive part.

A magnetic plate is used for the upper plate to make it detachable.

Alternatively, the upper plate itself may be provided with grooves corresponding to the ventilation passages so that the upper plate can be attached and detached to clean the glass plate and unclog the ventilation passages.

The advantage of the present invention is that it is extremely simple in structure and easy to manufacture as a method for adhering a film or the like to a glass plate or the like.

Conventionally, it was necessary to process the lower plate to be suctioned, such as by drilling holes in the glass plate, but with the present invention, such processing is not necessary, and any glass plate etc. can be easily used as a suction plate. . The simple structure lies in the ease with which double-sided adhesive tape is placed on the top plate, leaving a ventilation path, and the tape is simply adhered to a glass plate or the like.

First of all, as a negative carrier, any glass plate can be used as an adsorption type carrier without any processing such as drilling holes, and it can prevent out-of-focus and particle flow caused by poor flatness, which conventionally occurred, and prevent excessive embossment. This produces the effect of preventing long-term exposure. Moreover, since there is a step between the upper plate and the glass surface, setting the negative can be done easily and quickly even in the dark.

In addition, the upper plate attachment/detachment method facilitates cleaning of the glass surface and has the effect of preventing clogging.

Furthermore, since the upper plate can be made to have a thickness of 0.2 mm and the thickness of the bonded part is 0.2 mm, it has the effect of making it possible to manufacture a thin and lightweight carrier.

Although the embodiments of the present invention have been described above with a focus on negative carriers, the present invention has the same structure as the above, but has features that can be applied as is as an easel and as a contact baking frame. ing.

First of all, as an easel, the lower plate does not need to be made of glass, but with the same structure, the sheet version can be used as a dedicated sheet film easel, and the roll version can easily hold roll film with good flatness, which was previously difficult. It has the effect of increasing

In this case, I would like to emphasize that when used for holograms, it has the effect of eliminating vibrations at the suction holes that are located below the surface of the conventional film.

In addition, if the contact printing frame has the same structure but the photosensitive material is placed under the negative original plate to prevent air leakage, the remaining air under the negative original plate will be discharged by the pump operation, allowing easy and reliable adhesion. It is now possible to print small negatives, which were extremely difficult in the past, as well as 4X5.8X10.
It has the effect of making it extremely easy and quick to perform large sheet films, such as flints, dabs, etc. in close contact between roll films, and with a structure that uses glass for the base plate, it can be used as a carrier, an easel, and a close contactless. It can be used for work, which is extremely effective.

Also, according to this method, due to its structure, it is easy to produce non-standard negatives of special sizes, such as 6 x 17 cm or 4 x 10 inches, as well as adsorption-type negative carriers for one film, six frames, or three frames. So, with an auto printer, if you print three frames at the same time, the printing efficiency will be approximately tripled.

If you print 6 frames at the same time, you can increase the efficiency by about 6 times, and even in contact printing and tape printing, you can print one film or 6 frames at the same time, which was previously difficult. Traditional printing operations can be significantly improved.

In addition, the two methods have the effect that by applying the ability to create a thin suction plate, it is possible to easily convert an existing glass carrier into a suction type carrier without changing the basic structure. .

The above is about suction and holding in photographic work.

This method can be applied to light boxes for registers in plate making using transmitted light, and to maintain the flatness of Kent paper on drawing boards.

It can also be applied to hold tracing paper in close contact with Kent paper. In addition, for exhibition purposes, glass plates,
By adhering photographic film, etc. to a plastic plate, it is possible to create a beautiful display without the ugly unevenness that normally occurs. It also has the effect of being able to be adsorbed.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of a negative carrier for sheet film, in which A is a front view and B is a side view. In the figure, 1 is a glass plate, 2 is a top plate with air exhaust holes punched out of the window frame, and 3
is the suction hole, and 4 is the ventilation path from the suction hole to the discharge hole. Figure 2 shows the press plate for air leak prevention, A is the front view,
B is a side view. In the figure, 1 is a holding plate, 2 is a punched window, and 3
4 indicates the pressure rubber to prevent air leakage, and 4 indicates the hinge. FIG. 3 shows an embodiment in which a sheet film is inserted, and A is a front view and B is a side view. In the figure, 1 is the glass plate and 2 is the top plate. Fig. 4 is a side view of the air leak prevention device at the side edge of the film, and in Fig. 2, 1 is a glass plate, 2 is an upper plate, 3 is a leaf spring, and 4 is a pressure rubber. Figure 5 is a front view of an embodiment for roll film.
In the figure, 1 is the glass plate, 2 is the upper plate, and 3 is the lower plate. Patent applicant Rigio Waki

Claims (1)

[Claims] As stated in the specification, the upper plate can be joined to the plywood such as a glass plate in such a way that the upper plate can be sealed while leaving a ventilation passage through which air can be discharged from the side edges of the film to be adsorbed. A suction and holding method for films, etc. that allows films, etc. to be adsorbed to the plywood surface by suctioning air from the board or lower board.