JPH0237569B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a part of the exposure opening of a negative mask used when test printing is performed on small-sized photographic paper prior to final printing of a negative film image onto photographic paper. The present invention relates to a negative mask that can be used for test printing and allows the degree of opening to be adjusted while leaving only the amount necessary for test printing.

Generally, when enlarging a negative film image to a desired size and printing it on photographic paper, test printing is performed to check the color condition etc. before 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 the test printing, the paper mask must be replaced with a paper mask for final printing, which not only makes the operation more complicated. , there was also a risk of damaging the photographic paper.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to open the exposure aperture in one direction, leaving only the width necessary for test printing, by simple operation of the adjustment plate. To provide a negative mask which can be used for both test printing and which can adjust the degree of printing, return an adjustment plate to its original state after test printing, and immediately proceed to main printing.

In order to achieve the above object, the negative mask for test printing of the present invention has a negative holding plate rotatably supported so as to be able to clamp a negative film to the negative mask body. A storage box is fixed to the upper surface of the holding plate, and inside the storage box, the negative mask main body, the negative holding plate, and the storage box are connected to each other for exposure by sliding in one direction along a guide member provided in the storage box. Two approximately L-shaped adjustment plates are slidably arranged to adjust the degree of opening of the opening in one direction, and the position of the adjustment plates is maintained along the sliding direction of the adjustment plates. It is characterized by being equipped with a magnet that can be used.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a negative mask for test printing according to the present invention will be described in detail with reference to the drawings.

In the figure, reference numeral 1 denotes a negative mask for test printing, and the negative mask 1 mainly includes a negative holding plate 2, a negative mask main body 3, an adjustment plate 4, and a storage box 5.

By the way, the negative pressing plate 2 and the negative mask main body 3 are provided with exposure openings 6 and 7 approximately in the center that substantially match the image on the negative film, and each bent protrusion 8 and 9 is provided at the rear end. It is rotatably supported by a pin so that a negative film can be inserted and held therein. Reference numeral 10 indicates a film guide protrusion implanted in the negative mask body 3 to regulate the position of the negative film, and reference numeral 11 indicates a film guide protrusion 10.
This is a through hole drilled in the negative holding plate 2 in order to insert the .

A storage box 5 having an exposure opening 13 is fixed to the lower surface of the negative mask main body 3, and a storage box 5 having an opening of approximately L is provided in the box 5 so that the degree of opening of the exposure opening 7 can be adjusted.
Two letter-shaped adjustment plates 4 are housed. A long hole 14 is formed in the adjustment plate 4, and by fitting into a protrusion 15 as a guide member provided on the bottom surface of the storage box 5, the adjustment plate 4 can be slid in a fixed direction. Further, an arm 16 extends from the adjustment plate 4, and the tip of the arm 16 protrudes from a notch 17 provided on the side surface of the storage box 5 so that it can be operated by an operator. Further, a magnet 18 made of an elastic material is fixed within the storage box 5 in order to ensure that the adjustment plate 4 is maintained at a predetermined position after it has been moved.

In the figure, a long hole 14 is bored in the adjustment plate 4,
Although the protrusion 15 is provided inside the storage box 5, the adjustment plate 4
A protrusion 15 can be provided in the storage box 5, and a long hole 14 can be bored in the storage box 5. Furthermore, in the figure, a storage box 5 equipped with an adjustment plate 4 below the negative mask main body 3
However, it is also possible to arrange a storage box 5 equipped with an adjustment plate 4 above the negative holding plate 2. In addition, the movement mechanism for the adjustment plate 4 may be a movement mechanism that allows fine adjustment using a pinion and a rack.

The negative mask 1 for test printing according to the present invention includes:
It can be used as a negative mask for a printer as shown in FIG. Negative mask 1 is dark box 19
The light from the light source 21 passes through a dimming filter, a cut filter, a mirror tunnel, a diffuser plate, etc., and enters the dark box 19 through the negative mask 1. dark box 1
A lens 22 and a screen 23 for enlarging and projecting the image of the negative film in the negative mask 1 are disposed within the negative mask 1 . Note that 24 is photographic paper, and 25 is a mirror for reflecting an image projected onto the photographic paper 24. During test printing, first, the mirror 25 is placed at the position indicated by the solid line to prevent exposure of the photographic paper, the viewer shutter 26 is opened, and the operator looks at the image projected on the screen while holding the negative mask 1. After moving the adjusting plate 4 to make the image displayed on the screen the size necessary for test printing, the light from the light source 21 is shut off, the viewing shutter 26 is closed, and the mirror 25 is closed.
After moving 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. It is extremely easy to adjust the degree of aperture of the exposure aperture for test printing.

As is clear from the above description, in the negative mask for test printing according to the present invention, a storage box is fixed to the lower surface of the negative mask main body or the upper surface of the negative presser plate that holds the negative film to be printed from above and below, and 2, sliding in one direction along a guide member provided in the storage box to adjust the degree of opening in one direction of the exposure openings of the negative mask body, the negative presser plate, and the storage box that communicate with each other; Since the adjustment plate is equipped with approximately L-shaped adjustment plates, the adjustment plate will not be damaged, and the negative mask for test printing can be easily attached to and removed from the printer. It is possible to adjust the degree of opening of the exposure aperture in one direction, leaving only the width, and after test printing, the final printing can be performed immediately by simply returning the adjustment plate to its original state, which reduces processing capacity. A magnet that can maintain the position of the adjustment plate along the sliding direction of the adjustment plate is installed in the storage box, so the adjustment plate does not move during exposure, and especially the screen In the case of a type of printer in which the photographic paper is placed in a dark box that is difficult to operate, and only the negative mask can be operated, it is indispensably used, and can exhibit excellent practical effects.

[Brief explanation of drawings]

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 is a vertical cross-section of the portion excluding the negative presser plate taken along the line - in Fig. 1. The cross-sectional view shown in FIG. 1: Negative mask for test printing, 2: Negative holding plate, 3: Negative mask body, 4: Adjustment plate, 5: Storage box, 6, 7: Exposure opening, 8, 9: Bent protrusion,
10: Film guide protrusion, 11: Through hole, 1
2: Holding plate, 13: Opening, 14: Long hole, 15:
Projection, 16: Arm, 17: Notch, 18: Magnet.

Claims (1)

[Claims] 1. A storage box is fixed to the lower surface of the negative mask main body or the upper surface of the negative holding plate in a negative mask in which a negative holding plate is rotatably supported so as to be able to hold a negative film against the negative mask main body, and , two sheets that slide in one direction along a guide member provided in the storage box to adjust the degree of opening in one direction of the communicating exposure opening of the negative mask main body, negative presser plate, and storage box. A negative mask for both test printing and printing, characterized in that a substantially L-shaped adjustment plate is slidably arranged and a magnet is attached to the adjustment plate to maintain the position of the adjustment plate along the sliding direction of the adjustment plate.