JPS6312341Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to a printing mask for photographic enlargement.The purpose of this invention is to print two sheets for the 5th and 7th editions, 2 sheets for the 5th and 7th editions, and 2 sheets for the 5th and 7th editions, and 2 sheets for the 5th and 7th editions. - The purpose is to provide a three-size printing mask that allows three sheets of each of the four editions to be easily exposed by a simple switching operation.

Hereinafter, one embodiment of this invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes an oblong-shaped bed plate having a sliding fitting groove 2 on the upper surface and an elastic plate 3 attached to the lower surface. On the edge, pinch both ends and stopper surfaces 4a, 4.
A step notch 4 indicated by b is provided. A pair of knob positioning protrusions 5 are protruded from the central position of this notch, and "5x7" protrusions are provided at positions near the knob stopper surfaces 4a and 4b at both ends of the notch.
The 5th and 7th edition combination displays 6a and 6b are displayed as shown in FIG. Reference numeral 7 denotes a printing stand equipped with a manual operation knob 8, which has a positioning fitting part 7a and a photographic paper entry/exit cutout part 7b on which a half-sized photographic paper a of a camera plate can be placed as shown in FIG. It is fitted into the sliding fitting groove 2 of the base plate 1 so that it can move laterally within the range defined by the notch 4. The manual operation knob 8 of the printing stand 7 is fixed to the edge frame of the printing stand 7 with screws as shown in FIG. 1 so as to protrude to the front surface of the stand 1 through the step notch 4. Reference numeral 9 denotes a light-shielding cover plate attached to the upper surface of the base plate 1 with a hinge 10 so as to be open to the rear, and a window hole 11 for the 5th and 7th plates is provided in the center of the cover plate. 12 and 13 are window holes 11 for the 5th and 7th plates on both sides of the back side of this light-shielding cover plate 9.
A mask plate for 5th and 5th plates and a mask plate for 3rd and 4th plates are shown fitted so that they can be selectively moved, and one of the mask plates 12 has a window hole 1 of 5 x 5 cm.
2a, and the other mask plate 13 has a 3 x 4 cm window hole 13a, and can be moved under the window hole 11 for the 5th and 7th plates as shown in FIGS. figure,
As shown in FIG. 4, the elongated guide plates 14, 15 are slidably fitted into the shallow grooves 9a on the back surface of the light-shielding cover plate 9 so as to be able to move and stop at the positions on both sides where the window hole 11 for the fifth and seventh plates is opened. It is maintained by In addition, the two mask plates 12 and 13 are located at the left and right movement limit position with the window hole 11 for the 5th and 7th plates opened, and the stopper plate 16,
17, as shown in FIGS. 1 and 2.

Reference numerals 18 and 19 shown in FIGS. 1 and 2 are horizontally elongated grooves into which fingertips can be inserted and moved, which are recessed in the back surface of the light-shielding cover plate 9 to make it easier to move the mask plates 12 and 13 by hand.

The printing mask of this invention, constructed as described above, is used by installing it below the enlarger. Mask switching is performed in three ways. The method for this free size change is described below.
By moving and stopping the mask plate 13 for the 2nd, 3rd and 4th editions from side to side as shown in FIG. 1, the window hole 11 for the 5th and 7th editions is completely opened. In this state, place the photographic paper a half the size of a cabinet on the printing stand 7, and move the printing stand 7 laterally so that its manual operation knob 8 is located at the 5th and 7th plate combination display 6a. Then, close the light-shielding lid plate 9. Then, as shown in Figure 4, the left half of the photographic paper a will be exposed at the window hole 11 for the 5th and 7th plates, so if you turn on the lamp of the enlarger (not shown) for a few seconds,
The film image is exposed on the left half of photographic paper a as a 5.7 plate. When the exposure of this left half is completed, hold the manual operation knob 8 in your hand and move the printing stand 7 to the position of the 5th and 7th plate combination display 6b indicated by the arrow in FIG. It is exposed at the window hole 11. If exposure is performed again using the enlarger in this state, two copies of the 5th and 7th plates will be printed on the left half and right half of the photographic paper a, so these can be taken out by opening the light-shielding cover plate 9 and developed. You can get two photos of the May 7 edition.

() When using the 5th and 5th editions With the light shielding cover plate 9 open as shown in Figure 1, insert the mask plate 12 for the 5th and 5th editions into the window hole 11 for the 5th and 7th editions.
move it to the lower side. In this state, place the photographic paper a half the size of a camera on the printing stand 7, move the printing stand 7 laterally until the manual operation knob 8 touches the notched end stopper surface 4a, and then Close 9. Then, as shown in Fig. 5, the left side of the photographic paper a will be exposed at the window hole 12a of the mask plate 12 for 5th and 5th editions, so if the lamp of the enlarger is turned on for a predetermined period, the film image will be・The left side of photographic paper a is exposed as a fifth plate. Next, when the printing stand 7 is laterally moved to the central position so that the operation knob 8 is positioned by the protrusion 5, the central area of the photographic paper a is
Since it is exposed under the window hole 12a of the fifth plate mask plate 12, the second exposure using the enlarger is performed here. After this second exposure,
The printing table 7 is laterally moved until the manual operation knob 8 touches the notched end stopper surface 4b, and the right side of the printing paper a is exposed below the window hole 12a. When the third exposure is performed using the enlarger in this state, the 5.5 plate will be printed on the photographic paper a in three places: the left side, the center, and the right side. If you take it out and develop it at an aperture of 9, you can get three 5.5-plate photographs.

() When using the 3rd and 4th editions With the light shielding cover plate 9 open as shown in Figure 1, insert the mask plate 13 for the 3rd and 4th editions into the window hole 11 for the 5th and 7th editions.
As shown in FIG. 6, the printing stand 7 is moved laterally and stopped to expose the photographic paper a, as in the case of using the 5.5 plate described in () above. Then, the film image will be printed as 3rd and 4th editions on the left side, center, and right side of the photographic paper a.
If you take it out by opening it and develop it, you will get three 3rd and 4th edition photographs.

The printing mask of this invention is as described above, so two sheets for the 5th and 7th editions, 2 sheets for the 5th and 7th editions, and 2 sheets for the 5th and 7th editions, and 2 sheets for the 5th and 7th editions, and 2 sheets for the 5th and 7th editions,
If it is a 4th edition, 3 sheets each, mask plates 12 and 13
Exposure and printing can be easily performed by a simple switching operation and horizontal movement of the printing table 7, and it exhibits excellent practical effects as a three-size printing mask.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the photo enlarging printing mask of this invention with the lid open, FIG. 4 to 6 are cross-sectional views taken along the - line and are explanatory diagrams of the state of use. 1... Base board, 2... Sliding fitting groove, 4a, 4b...
...Knob stopper surface, 4...Paragraph notch, 5...Knob positioning protrusion, 6a, 6b...5th and 7th edition combination display, 7...Print stand, a...Photographic paper, 7a...Photographic paper Positioning fitting part, 8...Manual operation knob, 9
...Shading cover plate, 11... Window hole for 5th and 7th plates, 12...
Mask plate for 5th and 5th editions, 12a... Window hole of the same mask plate, 13... Mask plate for 3rd and 4th editions, 13a... Window hole of the same mask plate, 14, 15... Lid plate guide plate, 1
6,17...Stopper board.

Claims (1)

[Scope of utility model registration request] It has a horizontally elongated base plate with a sliding fitting groove and a positioning fitting part in which photographic paper half the size of a camera plate can be placed, and the plate is horizontally moved within a predetermined range in the sliding fitting groove of the base plate. A printing stand with a manual operation knob, a light-shielding cover plate with a window hole for the 5th and 7th plates in the center, and a light-shielding cover plate attached to the above-mentioned platen so as to be openable and closable, and the back side of this cover plate. A mask plate for the fifth and fifth plates and a mask plate for the third and fourth plates are fitted on both sides so as to be selectively moved to the window holes for the fifth and seventh plates, and the mask plates are switched. By moving the printing stand horizontally, two copies of the 5th and 7th editions, and 3 copies of each of the 5th and 5th editions and 3 and 4th editions can be exposed and printed on the photographic paper set on the printing table. Print mask for photo enlargement.