JPS62201432A - Photographic film magazine - Google Patents

Abstract

PURPOSE:To obtain a photographic film magazine having light shielding members which are good in light shielding performance without spoiling the function of the photographic film magazine even if a high-grade film is contained therein by flocking piles at specified order to a base cloth formed by regularly intersecting and weaving warp and weft. CONSTITUTION:This photographic film magazine is stuck with the light shielding members 5a, 5b having piles in an inlet and outlet part 3 for the photographic film. The ratio to indicate the position of the piles within one complete structure when the light shielding members 5a, 5b having the piles of such magazine are depicted on the structure figure is in a 120-500% range with respect to the basic structure. All fiber materials are usable without any limitation for the base cloth and piles of the light shielding members if the ratio of the pile flocking position to the base structure in one complete structure satisfies the above-mentioned conditions. The height of the piles to be included into the base cloth is preferably in a 1-1.8mm range and the count of the yarn to be used for the base cloth and the count of the yarn to be used of the piles vary largely with the number of pile flocking, the density of the base cloth, etc., and the count of the yarn to be used for the base cloth is preferably in an approximately 30-250 denier range.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a photographic film magazine, and more particularly to a photographic film magazine having an improved light-shielding member having a pile attached to the film entrance/exit portion of the photographic film magazine.

[Background of the Invention] Generally, a photographic film magazine has a light shielding member attached to the film entrance/exit portion to prevent light from entering the inside of the magazine body from the film entrance/exit portion.

For photographic film magazines, JIS K152
It is standardized by 8 etc. and is used with a built-in roll film. FIG. 1 shows a sectional view (part) of a photographic film magazine. Spool shaft 1
One end of the film 2 is fixed around a spool shaft 1, and the film 2 is wound into a cylindrical shape with the emulsion side facing inside, and the other end is exposed to the outside through a draw-out opening.

Reference numeral 4 denotes a photographic film magazine outer cylinder, which has a cylindrical shape made of a metal plate, and the film opening/exit part 3 is formed at both ends of the metal plate. The inside of the outer cylinder 4 is kept in a light-shielded state, and the photographic film magazine loaded in the camera is used to take pictures while pulling out the film 2. When the photographing is finished, the spool shaft 1 is rotated to wind the film 2 into the photographic film magazine. return.

When pulling out or rewinding the film 2 from the photographic film magazine, the film 2 can pass smoothly without damaging the surface, and the inside of the outer cylinder 4 is shielded from light, so that the film contact surface of the film entrance/exit section 3 A light shielding member 5a made of pile fabric is provided.

5b is attached.

On the other hand, recent photographic films have a film sensitivity of A S.
High-sensitivity films such as A 100G and A 3 A 1600, as well as even higher quality films, are being sought after, and along with this, the film's anti-sensitivity function, which is the basic performance of light-shielding materials used in photographic film magazines, has improved. It has been desired to develop a further improved light shielding member.

[Object of the Invention] Therefore, the object of the present invention is to provide a photographic film magazine having a light-shielding member with good light-shielding performance without impairing the functionality of the photographic film magazine even when high-sensitivity, high-quality photographic film is incorporated therein. It is to provide.

[Structure of the Invention] The above-mentioned object of the present invention is to provide a photographic film magazine in which a light-shielding member having piles is attached to a photographic film entrance/exit portion, in which one complete organization is obtained when the light-shielding member having piles is represented on an organization chart. This is achieved with a photographic film magazine in which the ratio of the position of the pile within the film ranges from 120 to 500% relative to the basic structure.

[Specific configuration of the invention] The light shielding member having pile used in the present invention has warp threads (
It is constructed by flocking piles in a certain order onto a base fabric woven with warp and weft threads regularly intersecting each other.

Generally, a tissue chart is used to represent the state in which the warp and weft of these base fabrics intersect and the state in which the pile is flocked. How to represent an organization chart will be explained with reference to Figure 2.

Figure 2 is a tissue diagram showing a state in which piles are embedded at a certain ratio in a plain-woven base fabric, and one section between two vertical ruled lines in the figure has one warp thread ( G+～G8
(indicated by) and one pile system (indicated by P+ to P8). Similarly, one section sandwiched between two meridians in the lateral direction in the figure represents one warp (g1 to g+4). In addition, in the same figure, the area where the warp threads are floating above the threads is the area indicated by the dense horizontal lines. Further, the locations where the pile yarn is hung on the weft (the pile is flocked) are indicated by X marks.

In FIG. 2, vertical directions g1 and g2, horizontal direction P1,
The range surrounded by G1, P2, and G2 is called one complete structure on the organization chart, and it shows that the light shielding member is woven by repeating this one complete structure.

Naturally, the above organization chart differs greatly depending on the weaving method of the base fabric, such as plain weave, twill weave, satin weave, etc., and the way the pile is flocked.

The basic structure in the present invention is the structure shown in the above-mentioned structure chart, which is used in conventional light-shielding members having piles, and the basic structure is divided into four patterns, each of which is shown in FIG. Shown in CA-1 to CD-1.

In the present invention, there are no restrictions on the weaving method of the base fabric, the way the pile is flocked, etc., as long as the light shielding member has a ratio indicating the position of the pile increased to 120% to 500% with respect to the basic structure. Generally, the preferable position of the pile on the organization chart is roughly determined by the weaving method of the base fabric, but on the other hand, as described above, the present invention does not have any restrictions on the weaving method, and shows the position of the pile with respect to the basic organization. It is characterized by its rate of increase.

In correspondence with the weaving method of the base fabric, the preferable ratio indicating the position of the pile with respect to the basic structure in plain weave is 150 to 400%, and the preferable ratio with respect to the basic structure in twill weave is 150 to 400%. 40
The ratio is preferably 140 to 500% with respect to the basic structure in satin weave.

When expressed on the above structure, the ratio of the pile position in one complete structure to the basic ma is 120 to 50.
An example of the light shielding member' of the present invention in the range of 0% is shown in Fig. 3A-
1 to D-3, but the present invention is not limited thereto.

Table 1 below shows the ratio of the pile flocking position to the basic tissue in the organization chart of the light shielding member shown in FIGS. 3A-1 to D-3.

Table-1 Sample No. Pile occupancy rate for basic structure CA-1 (basic structure) 100% A -1200% A -2400% CB-1 (basic structure) 100% B -1200% B -2300% B -3400% CC-1 (basic texture) 100% G -1300% C-2200% C-3200% CD-1 (basic illumination texture) 100% D -1200% D -2300% D -3500% Further, the photographic film of the present invention In a magazine, the height of the inner side of the film entrance/exit part of the film magazine main body to which the light shielding member of the present invention is attached to both inner surfaces before the light shielding member is attached is referred to as the film entrance/exit height. ) is approximately 1.50 to 2.6O, although it depends on the pile height including the base fabric of the light shielding member used in the present invention.
Preferably n+m, more preferably 1.80
~2.50 mm.

Here, if the height of the film entrance/exit part is too low, it is difficult to maintain the height of the entrance/exit part constant, which poses a problem in terms of product quality control of the photographic film magazine. Therefore, it is preferable to have a height above a certain level.

In the light-shielding member used in the photographic film magazine of the present invention, if the ratio of the pile flocking position to the basic tissue in the above-mentioned 1 complete structure satisfies the conditions of the present invention, the fiber material used for the base fabric and pile of the light-shielding member can be used. For example, polyamides such as nylon 6.6, polyesters such as polyethylene terephthalate, polyolefins such as polyethylene, polyvinyl alcohol, polyvinylidene chloride, polyvinyl chloride, polyacrylonitrile, Acrylics such as acrylamide and methacrylamide, synthetic materials such as vinylidene polycyanide, polyfluoroethylene, and polyurethane, natural fibers such as silk, cotton, wool, cellulose, and cellulose ester, and recycled fibers (rayon, acetate, etc.) etc.) or a combination of fibers with 2 fI or more. Among these fiber materials, preferred are polyamide-based materials such as nylon 6 and nylon 6.6, acrylic-based materials such as polyacrylonitrile, acrylamide, and methacrylamide, polyester-based materials such as polyethylene terephthalate, cellulose-based materials as recycled III, and cellulose ester-based materials. Some include rayon and acetate. These base fabrics and pile fibers may be the same or different.

In the light shielding member of the present invention, the height of the pile including the base fabric is preferably in the range of 1 mm to 1.8 mm, and the thickness of the thread used for the base fabric and the thickness of the thread used for the pile are as follows:
The thickness of the yarn used for the base fabric is preferably in the range of 30 to 250 deniers, more preferably 80 to 150 deniers, although it varies greatly depending on the number of piles embedded, base fabric density, etc. The thickness of the thread is approximately 30~
A range of 250 denier is preferred, more preferably 80 denier.
~150 denier, and the filament density of the yarn used for this pile is 20,000~eo,
ooo book/Cf is preferable, more preferably 25,00
It is 0 to 50,000 pieces/Cf.

In the light-shielding member used in the present invention, the black dyeing step for the light-shielding member may be carried out at the stage of pile yarn or after forming the light-shielding member. moreover,
For the purpose of preventing static electricity, a pile yarn that has been subjected to an antistatic treatment such as by incorporating carbon into the yarn may be used, or it may be formed as a light-shielding cloth and then subjected to an electrostatic treatment.

In addition, when manufacturing light shielding members, wide width (approximately 3Qcm to 1G
Gcm ) and then cut to a width for use as a light-shielding member, or may be manufactured from the beginning with a width for a light-shielding member. In this method of cutting into wide widths,
The cutting means may be the means described in Japanese Utility Model Publication No. 48-35790, or any means such as an ultrasonic cutter, a laser cutter, a heat cutter, etc. can be used.

In the photographic film magazine of the present invention, the light-shielding member having piles is based on the ratio of pile flocking positions in one complete tissue in the above-mentioned organization chart. It can be obtained by the same manufacturing process as a normal film magazine, except for using a specific range of materials. In the manufacturing process, for example, a rectangular metal plate that becomes the magazine body is heated, and a light shielding member coated with an adhesive is bonded to both ends thereof by thermocompression. Then,
A photographic film magazine is obtained by rolling up the magazine body, loading it with film, and capping it.

Methods for attaching the light shielding member used in the present invention to the magazine body include JP-A-49-96049 and JP-A-53-1.
No. 05219, No. 53-105220, No. 53-10
No. 5221, No. 54-4932, Patent Application No. 1986-752
The method described in No. 07 etc. can be applied.

In the photographic film magazine of the present invention, metals forming the magazine body include, for example, steel, zinc, aluminum, copper, and alloys thereof. In addition, the surface of these metals can be coated with phosphate coating method,
The metal surface treatment may be carried out by an iron oxide film chemical formation method, a chromate film formation method, a chromic acid-based oxide film formation method, a chromate diphosphate film formation method, or the like. Furthermore, the metal surface is
No. 62, No. 60-26063, Patent Application No. 60-7520
It may be coated with paint, ink, etc. described in No. 7 and the like. Specific paints and inks include alkyd resins, amino-alkyd resins, vinyl resins, acrylic resins, epoxy resins, polyurethane resins, polyester resins, various rust paints, water-based paints, and cellulose. Examples include derivative paints, inks, and the like. Also, JP-A-60-26061, JP-A No. 60-26062,
They can also be used in combination as described in 6G-26063 and the like.

In the light shielding member used in the present invention, a filler can be used to prevent the pile from falling off the base fabric and to prevent the adhesive from penetrating into the pile portion. The sealants used in the present invention include synthetic resin emulsions such as polyvinyl, polyolefin, polyurethane, polyamide, polyester, synthetic rubber, epoxy, phenol, and acrylic not included in these. Examples include a copolymer emulsion of one or more selected blends or a combination thereof.

In the present invention, the adhesive used for pasting the light shielding member having the pile and the magazine body includes:
Polyolefins such as polyethylene, vinyl acetate copolymers such as ethylene-vinyl acetate copolymers, acrylic acid ester copolymers such as ethylene-ethyl acrylate, ethylene-imbutyl acrylate, nylon 6, nylon 6゜6, nylon 10 , polyamides such as nylon 12 and N-methoxymethylated nylon, polyesters such as terephthalic acid, polyvinyl butyral, polyvinyl acetate, cellulose derivatives such as acetate, methyl cellulose, acetate butyrate, polymethyl methacrylate, etc. Polymethacrylic acid ester type, polyvinyl ether type such as polyvinyl methyl ether, polyurethane type, polycarbonate type, styrene block copolymer type such as styrene-ethylene-butylene-styrene, synthetic rubber type such as styrene-butadiene, isoprene, butyl rubber, etc. Examples include one or a mixture of two or more selected from special rubbers not included in these and acrylic copolymers not included above.

[Specific Effects of the Invention] As explained above, in the photographic film magazine of the present invention, the light shielding member attached to the film entrance/exit portion includes:
High-sensitivity, high-quality photographic film can be produced by using a film whose ratio, which indicates the pile position in 1 complete set 11 when expressed on an organization chart, is in the range of 120 to 500% of the basic composition. Even when built-in, we were able to provide a photographic film magazine with good light-shielding performance.

[Specific Examples of the Invention] Hereinafter, the present invention will be specifically explained using Examples, but the embodiments of the present invention are not limited thereto.

Example 1 Ten types of light shielding members shown in Fig. 3 A-1 to D-3 and CA-1 and C shown in Fig. 4 as basic structures for comparison.
Photographic film magazines were prepared using four types of light shielding members, B-1, CG-1, and CD-1, according to the method described in the text under the following conditions.

First, as a light shielding member,
Using the light shielding member shown in FIG. 0A-1, a photographic film magazine having the pile height and the height of the film entrance/exit section shown in Table 2 was created.

Margin table below-2 Sample No., pile height mm of film entrance/exit section
gsaIIIm CA -1-11,4mm 1.5CA
-1-21,4mm 2.0CA -
1-31,4mm 2.5A -1-1
1.4ma+ 1.5A -1-21,
4mm 2.0A -1-31,4mm
2.5A-2-11,401111
,5 A -2-21,4mm 2.0A -
2-31.4 mm 2.5 The nine types of photographic film magazines obtained contained Sakura Color SR1600 as a photographic film, and the light shielding properties and camera operability were evaluated under the following conditions.

The results are shown in Table-3.

[Light-shielding property] After irradiating the film for 5 minutes with the film partially pulled out from the film entrance/exit under a light source of 1G, 0OOLux, the film was developed and the leakage of light from the film entrance/exit was visually determined.

Judgment criteria: ○: No light leakage observed.

x:l light is recognized.

E Camera operability] (Film drawer and rewind operability) Using a Konica recorder DD (manufactured by Konishiroku Photo Industry viJ), shooting and rewinding operations were performed to examine camera operability.

Judgment Criteria ×: Film winding and rewinding temporarily stops during operation or becomes inoperable.

○: There is no operational abnormality.

Margin table below-3 Light shielding Camera operability (comparison) CA・1-1 0 × (n >
0A-1-2x ○(/F)OA-1-
3x ○ (Invention) A-1-10× (n) A-1-200 (〃) A-1-300 (#) A-2-10× (〃) A-2-200 (n) A- 2-300 As is clear from the v3 result in Table 3, in samples A-1-1 to A-2-3 using the light-shielding member of the present invention, the height of the film entrance and exit part was not very low in #A. If the height is too high, the operability of the camera will be difficult, but if the height of the entrance/exit part is above a certain level (facilitating the manufacturing process), the performance will be extremely good. On the other hand, with samples using conventional light-shielding members with a basic structure, light-shielding properties can only be secured when the height of the film entrance and exit section is made quite low (it is difficult to keep the height low and constant during the manufacturing process). However, if the height is higher than the window, there will be problems with light blocking.

Example 2: Pile height: 1.4m11 Film entrance/exit height: 2
．． Figure 3 A-1 to D-, each of which was kept constant at 5111.
3 and 4 CA-1, CB-1, CG-1 and C
A photographic film magazine sample was prepared using the light shielding member shown in D-1, and its light shielding properties were examined in the same manner as in Example 1.

The results are shown in Table 4.

Margin table below-4 Light shielding member No. Light shielding property A-11x A-120 A-230 08-14x B-150 B-370 C-18x C-190 C-2100 C-3110 CD-112X D-1130 D-2140 D-3150 As is clear from the results in Table 4, the film magazine using the light shielding member of the present invention can achieve the effects of the present invention even if the weaving method of the light shielding member is different, as long as the scope of the present invention is satisfied. I know it will happen.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the main parts of a photographic film magazine, FIG. 2 is an explanatory diagram of an organization chart, and FIG. 3 is an organization chart of a light shielding member of the present invention.
FIG. 4 shows a structure diagram of a light shielding member having a basic structure for comparison. 1... Spool shaft, 2. ...Film 3
...Film entrance/exit section, 4. ...Outer cylinder 5a, 5
b... Light shielding member patent applicant Konishi Rokushahei Kogyo Co., Ltd. Figure 2 F't
8 Figure 3 A + l A -28-I
B-2 Figure 3D-2D-3 Fir(rP1!rPeF(y P*rfPf
jrr#T'(1A-1 C-j PGPGPGPGPG Figure B-1 D-1 P@PerPeP(rP(:(

Claims (1)

[Claims] In a photographic film magazine in which a light-shielding member having a pile is attached to the photographic film entrance/exit portion, when the light-shielding member having the pile is represented on an organization chart, the ratio indicating the position of the pile within one complete organization is the basic organization. 120 against
A photographic film magazine characterized by a range of ~500%.