JPH0219804Y2 - - Google Patents

Description

[Detailed explanation of the invention] (A) Industrial application field The present invention relates to a simple cassette for photosensitive material rolls, and more specifically, it improves the light-shielding property of the photosensitive material outlet, and also improves the stable drawing strength of the photosensitive material. The present invention relates to a simple cassette that maintains the quality of photosensitive materials and improves the functionality of the cassette.

(B) Prior Art and Problems Cassettes for photographic paper rolls for phototypesetting (hereinafter referred to as ``phototypesetting'') include metal cassettes installed in phototypesetting machines and disposable simple cassettes made of plastic paperboard, cardboard, etc.

The present invention relates to the latter simple cassette. Due to the fact that simple cassettes are destined to be low-cost, they are naturally limited in terms of materials. The dimensional stability is inferior to that of the former metal cassette. Therefore, ideally, the gap at the photosensitive material outlet of the cassette should be zero with appropriate elasticity, regardless of the presence or absence of photosensitive material, but if the gap becomes larger than zero due to changes in environmental conditions. In addition, light rays leak from the outlet, causing light ray coupling, which is fatal for a photosensitive material, and the photosensitive material meandering during operation with a phototypesetting machine and winding back when reversed.

Therefore, this gap is usually designed to be small, and if the gap becomes too small, the photosensitive material will not be drawn out smoothly as a natural result. Most cassettes usually have long-haired fabrics such as cotton affixed to the photosensitive material outlet to improve light-shielding properties and paper passage. Maintaining a delicate gap is considered extremely difficult.

(C) Purpose of the invention The purpose of the invention is to prevent light beam coupling from the photosensitive material outlet of a simple cassette for photosensitive materials, and further to prevent meandering of the photosensitive material and unwinding when reversing. It is something.

(D) Structure of the invention The purpose of the invention is to create a simple structure for photosensitive materials in which the front end and the upper end of the front surface of a hexahedral storage foil are folded into the inside of the storage box to form a slit-shaped outlet in the width direction of the storage box. In the cassette, the upper front end of the storage box main body 10 made of paper is folded into the inside of the storage box main body 10 in a triangular shape so that the lower surface 8 is almost horizontal and fixed to the internal wall, and the front end of the upper surface is It is folded into the inside of the storage box body 10 in a V-shape, and left in a free state without being fixed to the upper inner wall.The folded upper surface part 7 is folded in and is in surface or line contact with the lower surface part 8, and there are cap shapes on both sides. Side plate 4,
This is achieved by providing a simple cassette for photosensitive materials characterized by having a slit-like outlet into which the cassette 4' is fitted.

(E) Examples The present invention will be explained in detail below based on the drawings.
Fig. 1 is a partially disassembled perspective view showing the configuration of one cassette example used in the present invention, Fig. 2 is a side sectional view of the drawer opening of the cassette example of the present invention, and Fig. 3 is a drawer of a conventional cassette example. It shows a side sectional view of the outlet.

The cassette is formed by fitting the cap-shaped side plates 4 and 4' into the main body 10 of the storage box.
The core holding shafts 5 and 5' of the side plates 4 and 4' are attached to the core 2 of the photosensitive material roll 3 wound around the core 2 (however,
The retaining shaft 5' of the side plate 4' is not shown in the figure)
By biting, the photosensitive material roll 3 becomes suspended in the cassette, and the photosensitive material can be pulled out from the outlet 6 formed in the width direction of the cassette. In the drawer opening 6, the folding upper surface part 7 has the front end of the upper surface of the storage box main body simply folded into the inside of the cassette, and a moderate pressure is exerted downward (in the direction of the arrow) to force it to return to its original state. Even if the cassette is slightly deformed, it will come into surface or line contact with the folded lower surface 8 of the outlet 6, so that light leakage from the outside can be prevented. The lower surface part 8 of the drawer opening is formed by folding the upper end of the front surface of the storage box main body into the cassette in a triangular shape so that the lower surface part 8 is substantially horizontal, and is fixed to the front inner wall so as not to move. Also, the photosensitive material 1 is inserted into the outlet 6.
When the photosensitive material 1 has passed through, the upper surface 7 of the outlet presses the photosensitive material 1 with appropriate pressure, so meandering when the photosensitive material is drawn out can be suppressed, and the photosensitive material 1 When the material 1 is reversed, this moderate pressing force can prevent the photosensitive material from returning back into the cassette.

On the other hand, in the conventional cassette example shown in FIG. 3, since the upper surface part 7' forming the outlet 6 is fixed to the upper inner wall of the storage box main body 10, pressure may be applied from the side during handling of the cassette. If the cassette is placed under high temperature or high humidity, phenomena such as waving and warping will occur on the walls of the storage box body 10, deforming the cassette, and causing the gap between the drawer opening 6 to As a result, light leakage occurs, or the pressing force against the photosensitive material passing through the outlet becomes weak, resulting in meandering of the photosensitive material during extraction or unwinding when the photosensitive material is reversed.

In the drawings, reference numeral 9 denotes a buffer cloth such as Betutin, and by attaching the buffer cloth 9 to the outlet, light leakage can be more effectively prevented, and at the same time, the paper permeability of the photosensitive material is improved.

The material for the simple cassette of the present invention is not particularly limited, but paper such as paperboard or cardboard is usually used to achieve low cost. Of these papers, it goes without saying that one that is as strong as possible against external pressure, impact, temperature and humidity, etc. is desirable. In addition, paper laminated with a black polyethylene film (polyethylene containing a black coloring agent such as carbon black) is useful as a material for simple cassettes in order to improve the light-shielding properties of the cassette walls. If cost permits, it is more preferable to further laminate a metal foil such as aluminum foil in order to improve the strength of the cassette and the light-shielding properties of the cassette wall.

The feature of this invention is that the front end of the upper surface of the storage box body, which is folded into a V-shape inside the cassette to form the outlet, is not fixed to the upper surface of the cassette and is free, so that it does not return to its original position at the folded part. However, this repulsive force differs depending on the material of the storage box body mentioned above, and in the case of the same material, depending on the thickness of the material, so it is important to select an appropriate material. An appropriate repulsive force can be selected by If the repulsive force of the material is too strong, it is best to adjust the thickness of the folded part by making an appropriate notch in the width direction of the fold on the inside or outside of the folded part. .

(F) Effects of the invention According to the invention, even if the cassette is slightly deformed due to changes in environmental conditions such as external pressure, shock, temperature and humidity during handling, transportation, or transportation, the drawer opening is always blocked. The closed state is maintained, preventing light from leaking from the outlet, and moderate pressure is applied from the top to the bottom of the outlet, preventing meandering and unwinding of the photosensitive material during operation of the phototypesetting machine. It is possible to maintain the quality of the photosensitive material and improve the functionality of the cassette.

[Brief explanation of the drawing]

Fig. 1 is a partially disassembled perspective view showing the configuration of one cassette example used in the present invention, Fig. 2 is a side sectional view of the drawer opening of the cassette example of the present invention, and Fig. 3 is a drawer of a conventional cassette example. A side sectional view of the outlet is shown. 4, 4'... Side plate, 5... Winding core holding shaft, 6...
...Photosensitive material outlet, 10... Storage box main body.

Claims (1)

[Scope of utility model registration request] The upper end of the front surface of the storage box main body 10 made of paper is folded into the inside of the storage box main body 10 into a triangular shape so that the lower surface 8 is almost horizontal, and is fixed to the internal wall.
By folding the front end of the upper surface into the inside of the storage box body 10 in a V-shape, the folded upper surface part 7 is folded and has a slit-shaped outlet in which it is in surface or line contact with the lower surface part 8. A simple cassette for photosensitive materials.