JPS58142332A - Negative mask used for test printing in combination - Google Patents

Abstract

PURPOSE:To perform a regular printing immediately after a test printing by shielding with a desired width simply and easily, by providing a shielding and adjusting plate to shield a part of the opening part for exposure of a main body of a negative mask or a negative pussing plate slidably. CONSTITUTION:A negative mask 1 in combination of test printing is constituted of a negative pussing plate 2, a main body of a negative mask 3, a shielding and adjusting plate 4 and a storing box 5. The negative pussing plate 2 and the main body of negative mask 3 are equipped with each opening part for exposure 6, 7 coincident with the picture of a negative film at each center, and have each bent and projected piece 8, 9 at each rear end and the negative film is inserted and held inbetween. A storing box 5 is fixed on the lower surface of the main body 3, and two shielding and adjusting plates approximately in L shape are stored to be slidable to a fixed direction, and as an arm 16 is projected from a notch 17, an operation is performed easily. Magnets 18 hold the plate 4 at the prescribed position.

Description

[Detailed Description of the Invention] Prior to final printing, a portion of the exposure opening of a negative mask used for test printing on small-sized photographic paper is shielded, leaving only the amount necessary for test printing. This relates to a negative mask that can be used for both test printing and printing.

Generally, when enlarging an image from a negative film to a desired size and printing it on photographic paper, a test printing is performed to check the color condition etc. before the actual printing. Conventionally, this was done by changing the size of the opening in a paper mask placed on top of the photographic paper. However, with this method, a paper mask for test printing is actually required for each size of photographic paper, and after test printing, the paper mask must be replaced with a paper mask for final printing, which not only makes the operation complicated. , and there was also a risk of damaging the photographic paper.

In view of the current situation, the present invention provides a negative mask in which a negative holding plate is rotatably supported so as to be able to sandwich a negative film with respect to the negative mask main body. By slidably arranging a shield adjustment plate for shielding a part of the exposure opening of the negative holding plate, a part of the exposure opening can be shielded to a desired width with a simple operation. This makes it possible to provide a negative mask that can be used for both test printing and which can be used for test printing immediately by opening the shielding part after test printing. In FIG. 0, reference numeral 1 denotes a negative mask for test printing, and the negative mask 1 mainly consists of a negative holding plate 2, a negative mask body 3, a shielding adjustment plate 4, and a storage box 5.

The negative holding plate 2 and the negative mask main body 3 are provided with exposure openings 6, 7 that match the image on the negative film approximately in the middle, and bent protrusions 8, 9 at the rear end, so that the negative film can be held securely. It is rotatably supported by a pin so that it can be inserted and clamped. 10 is a film guide protrusion installed on the negative stand 3 to regulate the position of the negative film;
1 is a through hole drilled in the negative holding plate 2 in order to insert the film guide protrusion 10. The negative holding plate 2 and the negative mask main body 3 are opened and closed by fixing one of them and rotating the other. In the figure, as an example, a negative holding plate 2 made of a paramagnetic material is suctioned and fixed to an upper fixed surface using a magnet or the like, and the negative mask main body 3 is rotated downward by pressing the holding part 12. This shows cases in which it is possible to move.

A storage box 5 having an exposure opening 13 is fixed to the lower surface of the negative mask body 3, and two abbreviated shielding adjustment plates 4 capable of shielding the exposure opening 7 are housed within the box. ing. A long hole 14 is formed in the shield adjustment plate 4, and by fitting into a protrusion 15 fixed to the bottom surface of the storage box 5, the shield adjustment plate 4 can be slid in a fixed direction. Further, an arm 16 extends from the shield adjustment plate 4, and the tip of the arm 16 protrudes from a notch 17 formed in the side surface of the storage box 5 so that the operator can operate the arm 16. Furthermore, the shield adjustment plate 4
Moved into place +! : A magnet 18 made of an elastic material is fixed inside the storage box 5 in order to reliably maintain the state after the storage box 5 is opened.

In the figure, a long hole 14 is bored in the shield adjustment plate 4 and a protrusion is provided in the storage box 5, but conversely, a protrusion is provided in the shield adjustment plate 4 and a long hole 14 is formed in the storage box 5. be able to. It goes without saying that the magnet 18 may be fixed downwardly on the negative mask body 3 so as to be in contact with the upper surface of the shielding adjustment plate 4 to attract it. Further, in the figure, the shield adjustment plate 4 is arranged below the negative mask main body 3, but it is also possible to arrange the entire shield adjustment plate 4 above the negative holding plate 2. In addition, the movement mechanism for the shield adjustment plate 4 may be a finely adjustable movement mechanism using a pinion and a rack.

The negative mask 1 for test printing according to the present invention can be optimally used as a negative mask for a printer as shown in FIG. From dimmer filter,
The light that has passed through the cut filter, mirror tunnel, diffuser plate, etc. passes through the entire negative mask 1 and enters the dark box 19.

A lens 22 and a screen 23 are arranged in the dark box 19 for enlarging and projecting the image of the negative film in the negative mask 1. Note that 24 is photographic paper, and 25 is a mirror for totally reflecting the projected image onto the photographic paper 24. When performing test printing, first place the mirror 25 at the position indicated by the solid line, prevent the exposure of the photographic paper, and press the pure shutter 26.
The operator moves the shield adjustment plate 4 of the negative mask 1 while viewing the image projected on the screen to make the image displayed on the screen the size necessary for test printing, and then turns on the light source 21. After blocking light from the camera, closing the pure shutter 26, and moving the mirror 25 to the position indicated by the chain line, the photographic paper 24 is exposed to light for a predetermined period of time. In such a printer, the screen 23 and the photographic paper 24 are housed in a dark box, and a mirror 25 is used, making it difficult to use a paper mask, whereas the negative mask 1 is located outside the dark box. , The shielding operation of test firing is extremely easy.

As is clear from the above description, the negative mask for test printing according to the present invention has a negative mask body or a negative presser plate that holds the negative film to be printed from above and below, and is placed above or below the negative mask body or the negative presser plate to expose the negative mask body or the negative presser plate. The shielding adjustment plate is slidably arranged to shield a part of the exposure opening, so with a simple operation, the exposure opening can be shielded leaving only the width necessary for test printing, making it possible to perform test printing. What's more, after the test printing, the final printing can be started immediately by simply opening the shielding part, which significantly improves the processing capacity. In the case of a type of printer in which only a negative mask can be operated, it is indispensable and can exhibit excellent practical effects.

[Brief explanation of the drawing]

The drawings show an embodiment of a negative mask for test printing according to the present invention. Fig. 1 is an exploded perspective view of the same, and Fig. 2 shows the part excluding the negative holding plate taken along the line FIG. 3 is a schematic cross-sectional view showing the state in which the device is applied to a printer. 1: Negative mask for test printing 2: Negative holding plate 3: Negative mask, main body 4: M-shield adjustment plate 5: Storage box 6.7: Exposure opening 8, 9: Bent protrusion 10: Film guide protrusion 11: Through hole 12: Holding part 13: Opening part 14: Long hole 15: Projection 16: Arm 17: Notch part 18: Magnet 9 Tei 1 Figure $2 Mouth

Claims (1)

[Scope of Claims] 1. In a negative mask, which is rotatably supported by a negative presser plate so as to be able to hold a negative film against the negative mask body, there is provided a negative mask body or a negative presser plate below the negative mask body or above the negative presser plate. Nekamask for both test printing and printing, characterized in that a shielding adjustment plate for shielding a part of the exposure opening of the plate is disposed so as to be completely slidable. 2. A negative mask for both test printing and printing as claimed in claim 1, characterized in that the mask is comprised of two abbreviated plates for partially shielding the opening from different directions.