JP3137878B2 - Roll film for photography - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a camera with information on the sensitivity and size of a brownie film or the like, or whether a photosensitive material is color or black and white, and which can be used for a photograph which can be automated. Related to roll film.

[0002]

2. Description of the Related Art In 35 mm photographic film, a cord comprising an electrically conductive portion and an insulating portion is provided on an outer wall of a patrone for accommodating a roll film, and the code is sensed on the camera side in order to automate the camera. A contact is provided to form a circuit, and in the camera internal mechanism, it is possible to automate setting of the sensitivity of the film to be used, display of the number of films and the number of remaining films, auto return, end warning, setting of an exposure area, and the like.

On the other hand, as a roll-shaped photosensitive material using a light-shielding paper, (1) a film and a light-shielding paper are superposed and wound,
A so-called cartridge type of 110 size or 126 size contained in a cartridge. (2) A so-called 120 size film in which a film is fixed to a substantially central portion of the entire length of the light-shielding paper with a bonding tape, and the light-shielding paper and the film are wound around a spool. And (3) a so-called 220-size film in which a leader light-shielding paper is attached to the leading end of the film and a trailer light-shielding paper is attached to the end of the film with a joining tape. As a camera using a photographic roll film having such a light-shielding paper and a spool (hereinafter, simply referred to as a photographic roll film), an auto-focus type camera has begun to appear. Regarding information on film characteristics such as sensitivity provided, due to the structure of the photographic roll film and the characteristics of the constituent materials, no measures have been taken to deal with automation from the film side, and information on film characteristics such as sensitivity. At present, the setting for is manually performed.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to
It is an object of the present invention to provide a photographic roll film that can automatically detect information on film characteristics, such as sensitivity, from a film in a brownie film typified by 0 size and 220 size after the film is loaded into the camera.

[0005]

According to the present invention, there is provided a roll film for photography according to the present invention, which includes information on the characteristics of the film on a joining tape for joining a light-shielding paper and a film in a 120- or 220-size film packaging material at a start position. , A bar code that the camera can identify,
The bar code is detected in combination with start detection of a camera.

Information desired to be provided on a photographic roll film includes ISO 25-3200 sensitivity information, size identification of 120 size or 220 size, identification of color film or black and white film, and In the case of color film, information such as identification of negative or reversal can be cited. In particular, sensitivity setting, type identification of 120 size or 220 size, and identification of color film or black and white film are automated. Is essential information.

[0007] In the 120- and 220-size film packaging materials of the present invention, these marks can be provided at any place on the joining tape between the light-shielding paper and the film. It may be provided sequentially along the direction in which it is loaded into the camera and taken up in shooting, preferably in combination with the start detection of the camera, or may have a dual structure of a data track and a clock track.

[0008]

When the marks are provided on the photographic roll film, the marks are set in consideration of easy camera design, ease of mark recording, no influence on the photosensitive material, and cost. Most preferably, it is provided on the joining tape between the light-shielding paper and the film.

FIG. 1 schematically shows a starting position in a 120-size photographic roll film, and FIG.
Is a plan view, and FIG. 2B is a side view. In the drawing, 1 is a bonding tape, 2 is a photosensitive material surface of a film, 3 is a black layer surface of a light-shielding paper, and 4 is a bar code. The same applies to 220-size photographic roll films.

The bonding tape is provided for bonding the light-shielding paper to the film at two points, the start point and the end point, of the film in the photographic roll film. When the optical mark 4 is provided on the surface of the joining tape 1, (1) the start detection of the camera and information on film characteristics such as sensitivity can be used together. (2) The joining tape faces the optical system of the camera. (3) The bonding tape can be provided with information sensing means in parallel with the optical system in the camera without greatly changing the structure of the current camera, thereby facilitating camera design. , Using blank paper is an optical reading means,
For example, barcode printing is easy. (4) The printing can be performed by a winding process around a spool, and there is an advantage that the cost is excellent.

The mark on the bonding tape may be an electric means such as a DX code or a CAS code comprising a conductive portion and an insulating portion. In this case, the mark can be used together with the start detection of the camera. Also, it is possible to form by pattern printing, but it is not preferable because the photosensitive material is damaged depending on the electric contact (for example, when the contact is a projection) in the camera. However, there is a problem that the cost of printing is higher than that of barcode printing.

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

Next, the light-shielding paper and the bonding tape between the light-shielding paper and the film in the photographic roll film of the present invention will be described.

As the light-shielding paper, light-shielding black paper or light-shielding paper having a light-shielding effect obtained by coating or laminating a resin in which carbon black is dispersed as a light-shielding agent on a base paper is used. Depending on the characters, symbols,
In addition, printing for increasing the commercial value may be performed, but it is possible to provide a bar code, a conductive portion, and an insulating portion by printing, sticking, or the like.

Specific examples of the light-shielding paper include bonding of the photographic film and the light-shielding paper under high temperature and high humidity, gas fogging, loosening of the winding caused by high bending rigidity, and dimensional instability due to moisture absorption are prevented. Light-shielding paper provided with at least one aluminum layer on a support (JP-A-55-140835, JP-B-61-36216), high-density polyethylene and low-density polyethylene for improving chargeability and improving sharpness during perforation Light-shielding paper provided with a layer consisting of
No.), a light-shielding paper provided with a laminated film composed of ethylene polymer, acrylate ester, methacrylate ester, vinyl acetate and ethylene copolymer to improve low-temperature heat sealability, contaminant sealability, and sharpness. 59-682
No. 38), and a light-shielding paper which prevents neck-in when the intermediate layer and the surface layer are applied by melt co-extrusion onto a support (Japanese Patent Application Laid-Open No. Sho.
8-186744), light-shielding paper processed on one or both sides with a layer formed of polyolefin or a polyolefin mixture (Japanese Patent Application Laid-Open No. 58-17434), and an absorption band at a wavelength of 550 mμ or more to increase light-shielding properties. A light-shielding paper using a paint having the same (JP-A-52-150016), a light-shielding paper coated with a copolymer such as methyl methacrylate, methacrylic acid, and ethyl acrylate (JP-A-50-67644)
), Light-shielding paper coated with a copolymer of at least one of an acrylic ester and a methacrylic ester with ethylene (JP-A-48-22020, Japanese Patent Publication No.
1-49205), light-shielding paper provided with a plurality of carbon black layers on a paper support (U.S. Pat. No. T871,004),
A light-shielding paper (GB 1,156,302) in which one side of paper is printed and a polyethylene layer containing carbon black is extruded and laminated on the other side, a protective layer is provided on the printed side of the paper, and carbon black is provided on the other side. Light-shielding paper processed with a layer of vinylidene chloride or styrene-butadiene copolymer containing the same (US Pat. Nos. 2,646,365 and 2,646,36).
No. 6, No. 2, 751, 309, No. 2, 959, 492
No. 3,053,779), light-shielding paper in which polyethylene containing carbon black is processed on the surface of a support by extrusion (French Patent 1,449,852, British Patent 1,071,032), Light-shielding paper coated with a mixture of an ethylene / vinyl acetate copolymer and carbon black (German Patent 1,903,378) and the like can be used.

As the joining tape, one surface of a base material such as paper or plastic film can be provided with a bar code, a conductive portion, or an insulating portion by printing, sticking, or the like. On the other side, as a pressure-sensitive adhesive, for example, styrene-isoprene-styrene block copolymer, styrene butadiene rubber, polybutene rubber, polyisoprene rubber, butyl rubber, natural rubber, rubber represented by synthetic isoprene, etc. To adjust the glass transition temperature, rosin, dammer, copal, hydrogenated rosin, rosin ester, indene chroman, picopearl, polyterpene, nitrocellulose, alkyd resin, butone,
Tackifying resin represented by xylene resin, plasticizer such as DOP, TCP, DBP, BBP as a softening agent, rubber-based pressure-sensitive adhesive to which paraffin chloride, animal and vegetable oils and fats, mineral oil and the like are added, or methyl acrylate, acrylic Ethyl acid,
Butyl acrylate, hexyl acrylate, acrylic acid 2
Acrylates such as ethylhexyl, isooctyl acrylate, octyl acrylate, decyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, isooctyl methacrylate, octyl methacrylate Acrylic pressure-sensitive adhesives obtained by dissolving a homopolymer or copolymer of esters such as methacrylic acid esters such as decyl methacrylate in a suitable solvent, or these esters and acrylic acid, methacrylic acid An acrylic pressure-sensitive adhesive obtained by dissolving a copolymer with a vinyl compound having a functional group such as itaconic acid, crotonic acid, and maleic acid in an appropriate solvent is used. When a copolymer having this functional group is used, a copolymer to which a small amount of an isocyanate-based organic crosslinking agent that reacts with the functional group is added in order to further enhance the heat-resistant aggregation effect is used.

Examples of the heat-sensitive adhesive include polyolefins such as polyethylene, vinyl acetate copolymers such as ethylene-vinyl acetate copolymer, and acrylic ester copolymers such as ethylene-ethylene acrylate and ethylene-isobutyl acrylate. , Nylon 6, nylon 6.
6, polyamide 10, such as nylon 10, nylon 12, N-methoxymethylated nylon, terephthalic acid-based polyester, polyvinyl butyral, polyvinyl acetate, cellulose derivative such as acetate, methyl cellulose, acetate butyrate, polymethyl Polymethacrylates such as methacrylate, polyvinyl ethers such as polyvinyl methyl ether, polyurethanes,
Styrene block copolymers such as polycarbonate, styrene-butadiene-styrene, synthetic rubbers such as styrene butadiene, isoprene and butyl rubber, or special rubbers not included therein, and acrylic copolymers not included above One type or a mixture of two or more types selected from coalescence is exemplified.

The marks provided on such a bonding tape include optical means and electric means. As the optical means, for example, a barcode symbol defined in JIS B 9550-1978 can be used. The barcode may be provided by attaching a barcode label to a bonding tape, but may be formed directly by printing, an inkjet method, a hot stamp method, or the like.

The ink used for printing is selected from those which are harmless to the photosensitive material and can be selected from commonly used offset printing inks, gravure printing inks or UV inks.

Typical synthetic resins used for these inks include polyvinyl chloride, vinyl nitrate, polyester polyamide urethane, polyacryl, rosin-modified maleic acid, ethylene vinyl acetate, vinyl ether, urethane vinyl chloride, and vinyl chloride vinegar. Biurethane resin, modified alkyd resin, modified phenolic resin, alkali-soluble resin (rosin-modified maleic acid resin, styrene maleic acid resin, styrene acrylate resin, acrylate acrylate resin, methacrylate acrylate resin), hydrosol type resin (Styrene maleate resin, styrene acrylate resin, α-methyl styrene acrylate resin, acrylate acrylate resin,
Methacrylate acrylate resin), Emulsion type resin (styrene resin, styrene acrylate resin, acrylate copolymer resin, methacrylate copolymer resin), resin for UV ink has acrylic unsaturated group Polymers are commonly used,
Representative examples are polyester / acrylate, polyester / urethane resin / acrylate, epoxy resin / acrylate, pentaerythritol triacrylate, trimethylolpropane triacrylate, hexanediol diacrylate, neopentyl glycol diacrylate, Triethylene glycol diacrylate and hydroxyethyl methacrylate. A commonly known colorant for bar code printing is used in combination with these inks. Examples of the coloring agent to be used include various pigments and azo pigments described in JP-A-63-44653 and the like (Azo Lake;
Carmine 6B, Red 2B, insoluble azo; monoazo yellow (PY-1, -3), disazo yellow (PY-1)
2, -13, -14, -17, -83), pyrazolo orange (PO-B-34), vulcan orange (PO-1)
6), condensed azo type; Chromophthal Yellow (PY-9)
3, -95), Chromophthal Red (PR-144,-
166), polycyclic pigments [phthalocyanine-based; copper phthalocyanine blue (PB-15, -15-1, -15-
3), copper phthalocyanine green (PG-7)], dioxazine type; dioxazine violet (PV-2)
3), isoindolinone type; isoindolinone yellow (PY-109, -110), sulene type: berylen, berynone, flavanthrone, thioindigo, lake pigment (malachite green, rhodamine B, rhodamine G,
Victorial Blue B) and inorganic pigments (oxides: titanium dioxide, red iron oxide, sulfates; precipitated barium sulfate, carbonate; precipitated calcium carbonate, silicates; hydrous silicates, anhydrous silicates, metal powders; aluminum powders, Bronze powder, zinc dust, carbon black, graphite, navy blue, etc. These pigments may be added to the aforementioned resin or paper layer as a light-shielding substance. In addition, various solvents, dispersants, wetting agents, defoamers, leveling agents, thickeners, stabilizers, cross-linking agents, waxes, etc. may be used as raw materials constituting the ink. An additive such as a dryer is used.

The percode may be formed by an ink jet method instead of the method of forming the percode by printing.

In the case of the ink-jet method, inks are generally classified into aqueous type and solvent type (oil type). As the aqueous ink, a water-soluble dye is used as a coloring agent, water is used as a solvent, monohydric and dihydric alcohols are used as a water-soluble solvent, and a polyhydric alcohol, a water-soluble nitrogen compound, and a hygroscopic organic compound are added as a wetting agent. Is also good. As the oil-based ink (solvent), an oil-soluble dye is used as a coloring agent, and a solvent of a poorly water-soluble solvent (glycol ether, ester) or a water-insoluble solvent (isoparaffin, etc.) is used. The adjusted one can be used.

Further, it may be formed by transfer by a hot stamping method. In this case, after a barcode is formed on the transfer film so as to be thermally transferable, the barcode may be thermally transferred to a barcode forming position on the photographic roll film.

In the case of the hot stamping method, heat-resistant pigments such as carbon black, navy blue, phthalocyanine blue, lake red G, calcium carbonate, alumina white, clay and titanium dioxide are mainly used as pigments. In addition, extenders such as silica and barium sulfate, and pigments having a low oil absorption are also added to improve cutting performance. Examples of the resin include hard resins such as rosin ester, terpene phenol, petroleum resin, acrylic copolymer, ethylene-vinyl acetate copolymer, cyclized rubber, vinyl chloride-vinyl acetate copolymer, natural carnauba wax, and montan wax. , Synthetic wax, low-molecular-weight polyethylene or other wax alone or a mixture thereof.

As the barcode forming surface, the barcode can be formed on the joining tape as it is.

[0035]

A varnish may be applied to protect the bar code. At this time, as the type of varnish to be used, acrylic resin, cellulose resin such as cellulose acetate, urethane resin, epoxy resin, polyester resin,
An appropriate resin such as an ionomer resin, an EEA resin, various polyethylene resins (low density, high density, linear low density, polyethylene, etc.) polypropylene resin can be used. Also, wax can be used.

[0037]

When a mark for identifying information on film characteristics is formed from a conductive portion and an insulating portion, a CAS code (Came) represented by a checkerboard pattern used in a 35 mm photographic film cartridge is used.
ra Auto Sensing Code camera auto-sensing code).

[0039]

[Function and Effect of the Invention] By providing a bar code on a bonding tape between a light-shielding paper and a film in a 120- or 220-size film packaging material so that information on the film characteristics can be identified, sensitivity and size in a brownie film or the like can be obtained. Or information about whether the photosensitive material is color or black and white, etc., can be provided to the camera, thereby enabling automation. Hereinafter, the present invention will be described in detail with reference to examples.

[0040]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the light-shielding paper is as follows. Mixed pulp of 30% softwood pulp and 70% hardwood pulp, cationized polyacrylamide as a paper strength agent, rosin derivative as a sizing agent, aluminum sulfate as a fixing agent,
Using a polyvinyl alcohol containing calcium carbonate and titanium oxide as a surface sizing agent,
An 80 μm, 80 g / m ² base paper was prepared. A 20 μm light-shielding film was prepared by inflation of LDPE containing 18% by weight of acetylene black.
After the light-shielding film and the above-mentioned base paper are adhered using a polyurethane-based dry laminating adhesive, gravure printing is performed on the base paper using an ink selected from the above-mentioned pigments as a colorant in a polyamide / nitrified cotton mixed resin. Then, the printed cotton is gravure-printed with 1 to 2 μm of polymethyl methacrylate as an overcoat layer (protective layer) to a total film thickness of 100 to 10 μm.
A light-shielding paper of 5 μm was obtained.

As a photosensitive material, a photosensitive film having a total film thickness of 95 μm of ISO400 was prepared.

The joining tape was prepared by using a mixed pulp of 20% softwood pulp and 80% hardwood pulp, a cationized polyacrylamide as a paper strength enhancer, a rosin derivative as a sizing agent, and a fourdrinier paper using aluminum sulfate as a fixing agent. , Kaolin, calcium carbonate, titanium oxide dispersed in polyvinyl alcohol and acrylic emulsion is coated with a 12 μm white layer to prepare a base paper with a total thickness of 100 μm. On the opposite side of the white layer, isoprene-based adhesive is used as a pressure-sensitive adhesive. A label was prepared by applying an adhesive of 30 μm and printing a bar code on the white layer by a hot stamping method.

A photosensitive film was stuck to the center of the black layer surface of the light-shielding paper prepared above, and the photosensitive material layer side at both ends in the longitudinal direction of the film and the black layer side of the light-shielding paper were bonded with a bonding tape to form a 120-size sheet. Was prepared.

The information in the bar code is, for example, in order from the start of the film, camera start information, film sensitivity information, information for setting to 120 size, information for color film, negative information, and end information. However, the information recording form is arbitrary.

The photographic roll film thus produced has a bar code detecting means in parallel with the optical system inside the camera, detects the bar code immediately before the start of the film, and sets exposure conditions based on the information. When mounted on a camera that can perform the photographing, it is possible to automate the photographing using the photographic roll film.

[Brief description of the drawings]

FIG. 1 schematically shows a starting position in a 120-size photographic roll film, wherein FIG. 1 (a) is a plan view and FIG. 1 (b) is a side view.

[Explanation of symbols]

1 is a bonding tape, 2 is a photosensitive material surface in a film, 3
Denotes a black layer surface of the light shielding paper, and 4 denotes a bar code.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03C 3/00 G03B 1/00 G03B 7/24 G03B 17/28

Claims (2)

(57) [Claims] 1. A joining tape for joining a light-shielding paper and a photosensitive film in a 120-size or 220-size film packaging material at a start position, provided with a bar code that is information on the film characteristics and can be identified by a camera , The bar code is used together with the camera start detection.
A roll film for photography, characterized in that the film is sensed . 2. The photographic roll film according to claim 1, wherein the information on the film properties is sensitivity, size, color or black and white.