JPH026444Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a light-shielding structure for rolled photographic paper.

Conventional photographic paper, which is used for printing from negative film, is prepared by wrapping the photographic paper in a roll around a paper core and wrapping it in a light-shielding bag, and is used for photographs on driver's licenses, etc. In the case of positive paper, as shown in FIG. 1, photographic paper 20 is wrapped around a paper core 10, and light-shielding paper 30 is provided on the outer peripheral surface of the paper core 10. In the latter case, only the central part where printing is performed is usually punched out and used, so there is no problem even if the sides of the photographic paper 20 have optical fog, but in the former case, the entire width of the photographic paper is It is extremely inconvenient if optical fog occurs on the sides.

In order to prevent the occurrence of such optical fog, it is necessary to load the photographic paper onto the original reel in a dark room, but this is extremely troublesome.

This idea was created in view of the above, and its main purpose was to clarify the light-shielding structure of rolled photographic paper that can be loaded and processed in a bright room. Other objectives or benefits of this invention, such as speeding up the process, will become apparent from the description below.

A light-shielding structure for a roll of photographic paper that achieves the object of the present invention is provided on both sides of a roll of photographic paper wrapped in a roll of photographic paper to shield the side surfaces of the roll of photographic paper from light. A side light-shielding paper having a side light-shielding part and a bent part where the end of the outer face light-shielding part is bent in the direction of the photographic paper is arranged, and the outermost light-shielding paper has a cutout part at the outermost periphery of the rolled photographic paper. It is characterized by being wrapped in

Hereinafter, embodiments of this invention will be described in detail with reference to the accompanying drawings.

2 and 3 show an embodiment of this invention, in which photographic paper 20 is wound around a paper core 10. FIG. Reference numeral 31 is a side light-shielding paper, which is formed into an eyelet shape, and the central cutout end is connected to the paper core 10.
It is attached to the paper core 10 or bent inside the paper core 10 and fixed so that it does not easily come off. Photographic paper 20
As the wrapping progresses and the end is passed, the side light shielding paper 31 is folded inward as shown in the figure, and the outer peripheral light shielding paper 32 attached to the end of the photographic paper 20 is folded through the notch 33 to the side face. It is guided to the outside of the light-shielding paper 31 and wrapped several times. 21 is a hole for detecting photographic paper.

The light-shielding structure for rolled photographic paper of this invention incorporates the following embodiments.

(1) A light-shielding structure for rolled photographic paper, characterized in that the width of the light-shielding paper on the outer periphery is the same as that of the photographic paper.

(2) A light-shielding structure for rolled photographic paper, characterized in that the light-shielding paper on the outer periphery and the photographic paper are connected in a manner that does not hinder conveyance.

(3) A light-shielding structure for rolled photographic paper, characterized in that it has a notch in the photographic paper, the outer circumferential light-shielding paper, or the joint between the photographic paper and the outer circumferential light-shielding paper, through which the folded portion of the side light-shielding paper escapes.

(4) A light-shielding structure for rolled photographic paper, characterized in that it has a notch that is the same as the bending length of the folded portion of the side light-shielding paper, and does not interfere with the bending of the side light-shielding paper when wrapping the outer light-shielding paper. .

(5) A light-shielding structure for rolled photographic paper, characterized in that a detection hole is provided at or near the connection between the photographic paper and the outer light-shielding paper.

(6) A light-shielding structure for rolled photographic paper, characterized in that a main reel having a side plate having a diameter equal to or larger than that containing the wound outer circumferential light-shielding paper is provided on both sides.

(7) A light-shielding structure for a roll of photographic paper, characterized in that a source reel and a roll of photographic paper are engaged in a state in which driving and/or braking force can be transmitted.

(8) A light-shielding structure for rolled photographic paper, characterized in that the original reel has a structure (pin holes, key grooves, etc.) capable of transmitting driving and/or braking force to the outside.

Since the light-shielding structure of this invention is constructed as described above, the photographic paper 20 can be loaded onto the original reel 40 in a bright room, and moreover, the photographic paper 20 can be loaded onto the original reel 40 in a bright room.
It is also possible to attach the original reel 40 loaded with the original reel 40 to the photographic paper conveyance system of the photoprinting machine in a bright room. That is, after fixing the source reel 40 to a predetermined axis of the conveyance system, the outer light-shielding paper 32 is slightly pulled out and engaged with the conveyance system, and then the outer light-shielding paper 32 is fed idly, and as the outer light-shielding paper 32 is pulled out, , cutout 3
After position 3, the side light-shielding paper 31 is unbent, the photographic paper 20 is fed out without damaging its side surface, and the photographic paper 20 is unrolled by detecting the photographic paper detection hole 21. You can tell when loading is complete.

As described above, according to the light shielding structure of this invention,
Rolls of photographic paper can be handled in a bright room, and unlike conventional products, there is no risk of accidental exposure, which greatly contributes to speeding up photographic printing operations.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional example, FIG. 2 is a partial sectional view showing an embodiment of this invention, and FIG. 3 is a plan view showing a joint between photographic paper and light-shielding paper. In the figure, 10 is a paper core, 20 is photographic paper,
21 is a hole for detecting photographic paper, 30 is a conventional outer circumferential light-shielding paper, 31 is a side light-shielding paper, 32 is an outer circumferential light-shielding paper, 33
40 indicates a notch portion, and 40 indicates a source reel.

Claims (1)

[Scope of utility model registration request] A roll of photographic paper wrapped in a roll has a side light-shielding section on both sides that blocks light from the side surface of the roll of photographic paper, and an end of the outer light-shielding section is bent toward the photographic paper. A light-shielding structure for a roll of photographic paper, characterized in that a side light-shielding paper having a folded portion is arranged, and the outermost light-shielding paper having a notch is wrapped around the outermost periphery of the roll of photographic paper. .