JPH08314063A - Base for photosensitive material, long-wound roll of photosensitive material formed by applying coating liquid such as photosensitive emulsion on the base and method for forming the long-wound roll - Google Patents

Abstract

PURPOSE: To prevent the occurrence of the shape impression accident on a photographic sensitive material and its base surface at the time of forming a long-wound roll by winding the photographic material or its base on a winding core and the consequent unequal application and pressure fogging at the time of applying an emulsion coating liquid. CONSTITUTION: The long-wound roll of the base for the photographic material or the photographic material 10 formed by applying the coating liquid material, such as photographic emulsion on the base is obtd. by inclining the shape of the section 14 at the front end part of the base or photographic material to be wound around the winding core 21 of the long-wound roll to the front surface of the base or the photographic material 10. The base or the photographic material 10 is wound around the winding core by directing the dull angle side of the section 14 at the front end of the base or the photographic material 10 toward the winding core side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the production of a long-winding roll of a light-sensitive material or its support which is free from mold defects and pressure fog.

[0002]

2. Description of the Related Art A support for a photosensitive material such as a printing film or color photographic paper or a photosensitive material formed by applying a coating solution such as a photosensitive material on the support is used in the manufacturing process.
As shown in the partial perspective view of (c), its tip is cut at a right angle to the surface of the support or the photosensitive material, and is wound around a winding core to form a long roll as shown in the partial side view of FIG. Further, it is repeatedly commercialized that the unwinding is performed for other processing, and the winding long-winding roll is formed again to perform another processing in the next step. In this way, the first support is coated with a light-sensitive emulsion and is further shipped as a long-roll-shaped product having various lengths and widths.

[0003]

Since the cross section of the photosensitive material or its support, which is the end cut end, is perpendicular to the surface of the support or the photosensitive material, the tip of the support is wound around the core, for example. By the tightening force due to the winding tension and the difference in thickness between the core and the support, the mold is formed, and when the coating liquid is applied in the next step, the pressed part becomes uneven. Further, when the coated photosensitive material is wound around the winding core, pressure fog and patterning failure occur.

The present invention eliminates these problems and eliminates the problem of mold attachment, coating unevenness and pressure fog, and has a high process yield and product yield. It is an object of the present invention to provide a long winding roll of a photosensitive material formed by applying a coating liquid and a method for forming the long winding roll.

[0005]

This object is achieved by any of the following technical means (1), (2), (3) and (4).

(1) A support for a light-sensitive material or a long-winding roll of a light-sensitive material formed by coating a coating solution such as a photosensitive emulsion on the support, the support or the above-mentioned support being wound around the core of the long-winding roll. A support for a photosensitive material, characterized in that the cross-sectional shape of the tip portion of the photosensitive material is inclined with respect to the surface of the support or the photosensitive material, or a coating solution such as a photosensitive emulsion is applied to the support. Long roll of photosensitive material formed by

(2) In the support or the photosensitive material, the cross-sectional shape of the tip portion is 15 to 15 on the acute angle side.
The long-roll roll of a light-sensitive material formed by coating the support for light-sensitive material according to claim 1 or a coating solution such as a light-sensitive emulsion on the support at 60 °.

(3) The diameter of the winding core is 50 to 500.
2. A long roll of a photosensitive material formed by coating a support for a photosensitive material according to claim 1 or a coating solution such as a photosensitive emulsion on the support.

(4) A method for forming a long-winding roll by winding a support for a photosensitive material according to claim 1 or a photosensitive material formed by applying a coating solution such as a photosensitive emulsion on the support, around a winding core. 3. A method for forming a long roll, comprising winding the support or the photosensitive material with the obtuse angle side of the cross section of the tip portion facing the winding core side.

[0010]

EXAMPLES The present invention will be described in detail below with reference to its working examples, but the embodiment of the present invention is not limited thereto.

The partial perspective view of FIG. 1 (a) shows a cross section 14 of the tip of the support 11 or the photosensitive material 10 cut by a cutter, that is, a shape of a cut. And 10B. Further, the partial side view of FIG. 1B shows various inclination angles α on the acute angle side. In the partial perspective view of FIG. 1C, the cut section 14 is a support or a photosensitive material surface 10.
It is of the conventional type at right angles to A and 10B.

The perspective view of FIG. 2 shows a state in which the tip portion 11 of such a support or photosensitive material 10 is brought into contact with the winding core 21 and winding is just started, and the cross section 14 with respect to the surface of the support or photosensitive material. It is shown that the side where the inclination angle is obtuse, that is, the surface of the support or photosensitive material indicated by 10B is brought into contact with the winding core 21. The partial side view of FIG. 3 shows the beginning of the winding. When tightening pressure is applied to the tip portion 11 from the outer support or the photosensitive material, the amount of deflection increases as it approaches the tip edge 12, and the support or photosensitive material of the tip portion 11 including the inclined surface near the cross section 14 is a plate. It can be flexed continuously like a spring. The partial side view of FIG. 4 shows a state in which the support or the photosensitive material 10 is further wound and the second week is wound. Even if a tightening pressure acts from the outside in this state, the support of the tip portion 11 including the inclined surface of the cross section 14 or the photosensitive material 10 does not concentrate on the tip edge 12, and the inclined surface of the cross section 14 is not received. The support of the tip portion 11 including the surface or the entire surface 10A of the photosensitive material is dispersed and received.
As shown in the perspective view of (c), when the cross section 14 is at a right angle, compared to the state where the tightening pressure is concentrated and received at the edge portion 16, unevenness in the application of the mold and the accompanying application unevenness and pressure fog may occur. Disappear.

FIG. 5 is a partial side view of the long roll 1 in which the support or the photosensitive material 10 is continuously wound.

As shown in FIG. 1 (b), the smaller the acute angle portion of the tilt angle, and conversely, the larger the obtuse angle portion, the less the above-mentioned failures. The acute angle is 60 ° or less 1
5 ° or more is preferable, and 45 ° or less and 20 ° or more are more preferable because processing is easy.

The outer diameter of the winding core is not particularly limited, but usually 50 to 500 mm is used. The width of the support or the photosensitive material is not particularly limited.

The winding core is a ball core, a plastic core,
Although there are bakelite cores and cushion cores, the effect of the present invention is remarkable regardless of which core is used.

[0017]

By the simple and low cost method of the present invention,
It is possible to prevent a photographic light-sensitive material which forms a long roll by winding it around a winding core and a mold defect on the surface of its support, uneven coating at the time of coating an emulsion coating solution, and pressure fog. It was Then, the amount of waste of the light-sensitive material and its support was reduced and the yield was improved. Further, conventionally, it is no longer necessary to use the core made of a cushioning material to eliminate the above-mentioned mold fault even when the core is bent, and the winding precision is improved and the winding operation is facilitated.

[Brief description of drawings]

1A and 1C are perspective views showing a cutting shape of a support or a tip portion of a photosensitive material by a cutter, and FIG. 1B is a side view showing various inclination angles of a cutting cross section.

FIG. 2 is a perspective view showing a state in which a support or a photosensitive material surface whose cut section has an obtuse angle of inclination is in contact with a winding core.

FIG. 3 is a side view showing the behavior of the cross section of the support or the end of the photosensitive material when the core is wrapped around the core.

FIG. 4 is a side view showing an initial state of forming a long roll.

FIG. 5 is a partial side view of a long winding roll in which the shape of the cross section of the support or the end of the photosensitive material of the present invention is wound around a winding core.

FIG. 6 is a partial side view of a conventional long roll in which the shape of a cut cross section of the tip of a conventional support or a photosensitive material is wound around a winding core.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 long winding roll 10 support or photosensitive material 10A acute-angle side support or photosensitive material surface 10B obtuse-angle side support or photosensitive material surface 11 support or photosensitive-material tip 12 acute-angle side edge 13 obtuse-angle edge 14 cross-section 16 90 ° cross-section Edge of 21 winding core

Claims (4)

[Claims] 1. A support for a light-sensitive material or a long-winding roll of a light-sensitive material formed by coating a coating solution such as a photosensitive emulsion on the support, wherein the support or the light-sensitive material is wound around the core of the long-winding roll. The cross-sectional shape of the tip portion of the material is inclined with respect to the surface of the support or the photosensitive material, or a support for a photosensitive material, or a coating solution such as a photosensitive emulsion is applied to the support. Long roll of formed photosensitive material. 2. The support for a photosensitive material or the support according to claim 1, wherein the support or the photosensitive material has a sectional shape of the tip portion of 15 to 60 ° on an acute angle side. A long roll of photosensitive material formed by applying a coating solution such as a photosensitive emulsion to the body. 3. The support for a photosensitive material according to claim 1, wherein the diameter of the winding core is 50 to 500 mm, or a photosensitive material formed by coating a coating solution such as a photosensitive emulsion on the support. Long roll of material. 4. A method for forming a long-winding roll by winding a support for a photosensitive material according to claim 1 or a photosensitive material formed by coating a coating solution such as a photosensitive emulsion on the support, around a winding core. , With the obtuse angle side of the cross section of the tip portion of the support or the photosensitive material facing the winding core side,
A method of forming a long roll characterized by winding.