JPH07257072A - Desensitized pressure sensitive forms - Google Patents

Abstract

PURPOSE:To provide pressure sensitive forms, especially pressure sensitive forms for OCR, composed of pressure sensitive paper which is not restricted by problems such as setting off or blocking, or by selection of classes of read ink for OCR concerning special pressure sensitive paper of which copy coloring is strengthened. CONSTITUTION:In pressure sensitive forms 1 having a structure wherein a plurality of sheets of paper are optionally selected from pressure sensitive upper paper 2, middle paper 3, and lower paper 4, and they are superimposed on each other, desensitized ink 9, 14 is applied to a copy-unrequired part 10, 15 on a surface of the lower paper 4 or the middle paper 3. Besides, a coated layer 18, 22 consisting of desensitized ink 9, 14 or OP varnish 17, 21 coating a coloring agent capsule-coated part 20, 16 is provided to the coloring agent capsule-coated part 20, 16 in opposed contact to the copy-unrequired part in printing or writing on a rear face of the upper paper 2 or the middle paper 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive copying form which has been subjected to a desensitization treatment, and more particularly, to various pressure-sensitive copying papers constituting the pressure-sensitive copying form, which are coated with a desensitizing ink. The decolorizing agent capsule or the overprint varnish (hereinafter referred to as O
The present invention relates to a pressure-sensitive copying form in which a desensitizing effect is enhanced by covering with a covering layer made of P varnish).

[0002]

2. Description of the Related Art Conventionally, it is a well-known technique to form a color image by a contact reaction between an electron-donating color developing agent and an electron-accepting color developing agent. Is generally applied evenly over the entire surface of the support, so if there are unnecessary areas for copying, use a desensitizing ink that has the function of reducing or eliminating the function of the color developer by flexographic printing or gravure printing. By printing, spot-printing was performed on the surface coated with the color developer to prevent the pressure-sensitive color development of the unnecessary portion of copying.

On the other hand, in recent years, since an apparatus for reading a printed character or a handwritten character by its optical reflectance, that is, an optical character reader (hereinafter referred to as OCR) has been used for inputting information to a computer, it has been used for OCR. The demand for such forms is increasing more and more, and more recently, invoices are automatically issued by machine printing, and the method of reading returned receipts by OCR is rapidly increasing. Therefore, under such a situation, it is necessary to supply a pressure-sensitive copying form that allows the copied characters formed on the pressure-sensitive copying paper to be read using OCR.

Since these pressure-sensitive copying forms are required to optically and reliably read the color-developed image on the formed paper, the color-developed image is used for the OCR.
The light absorptivity of the light source and the light receiving element must be sufficient, and even the lower order parts constituting the form must have sufficient color density. Therefore, for example, in a wide range. Special pressure-sensitive copying paper, such as one coated with a color-forming agent capsule having good light-wavelength absorption and one coated with an increasing amount of color-developing agent to increase the color density of copied characters, must be combined.

[0005]

DISCLOSURE OF THE INVENTION In the desensitizing process for such a special pressure-sensitive copying paper having enhanced color development for OCR, the above-mentioned conventional method is not sufficient, and therefore, the color developing agent is used. The desensitizing ink is applied to the application surface in a larger amount than usual. However, for example, if the applied desensitizing ink is an oxidative polymerization type, the drying is slow and setoff or blocking occurs, or if it is an ultraviolet curing type, it is quick-drying but the lead ink for OCR is also reduced. It has to have the same UV-curing type as the sensitive ink, and has a defect that the desensitized ink is not suitable for the stamp. Therefore, in the present invention, the amount of the desensitizing ink applied to the developer-coated surface of the special pressure-sensitive copying paper with enhanced color reproduction is the same as that of the usual case or more than that of the usual case. An effective desensitizing process with a small amount of sufficient desensitizing function is applied. Therefore, pressure-sensitive copying composed of pressure-sensitive copying paper which is not restricted by set-off and blocking problems or selection of OCR lead ink type. The object is to provide a form, especially a pressure-sensitive copy form for OCR.

[0006]

In order to achieve the above-mentioned object, according to the present invention, a pressure-sensitive copying upper paper in which a color former capsule is applied to the back surface of a paper substrate, and a front surface and a back surface of the paper substrate. You can arbitrarily select multiple sheets of paper from the same paper that has a color developer and color developer capsules applied to it, and the same paper that has a color developer applied to the surface of the paper base material, and stack them. A pressure-sensitive copying form having a combined structure, wherein desensitizing ink is applied to a portion of the front surface of the lower paper or the middle paper that does not need copying, while the back surface of the upper paper or the middle paper is printed or written. A desensitizing treatment, characterized in that a coating layer made of desensitizing ink or OP varnish for coating the color-forming agent capsule-applied portion is provided in the color-forming agent capsule-applied portion facing the copy unnecessary portion, and , Especially the color OC each of said color developer, a copying color image formed by these contact reactions, which are used as
A pressure-sensitive copying paper coated with a color-developing agent and a color-developing agent, which has a light-absorbing property according to R and has an appropriate color-developing density so that it can be read by the OCR. The present invention provides a pressure-sensitive copying form.

The pressure-sensitive copying paper constituting the pressure-sensitive copying form in the present invention may be one which has been conventionally used. For example, on the back surface of the paper base material, an electron donating material such as crystal violet lactone or benzoyl leuco methylene blue may be used. Top or middle paper coated with color former capsules, or the surface of the paper substrate is coated with an electron-accepting developer such as oil-soluble phenol resin, acid clay, or metal salt of aromatic carboxylic acid. Lower or middle paper. In order to support OCR, the upper or middle paper coated with a color-forming agent capsule containing a special dye that forms a copy-colored image that absorbs a wide range of light wavelengths and OCR reading can be used to increase the color density. Therefore, lower paper or middle paper, which has a greater amount of developer applied than general ones, is combined.

The desensitizing ink applied to the surface coated with the color developer or the surface coated with the color-forming agent capsule of the pressure-sensitive copying paper according to the present invention may be of any type such as an ultraviolet-curable type or an oxidative polymerization type, which is generally used. For example, alkyltrimethylammonium halide, a cationic surfactant such as alkylpyridinium hydrochloride, or a desensitizer such as a polyol or amine, in a vehicle in which an alcohol-soluble resin is dissolved in an alcohol solvent, It may be prepared by dispersing these desensitizers with titanium white, barium sulfate or the like.

The OP varnish applied to the surface coated with the color developer capsules includes oxidative polymerization dry type varnish for offset planographic printing or letterpress, solvent type, water-based, thermosetting type, and ultraviolet curing type. Printing machine, letterpress printing machine,
It is applied or printed on the paper surface by a gravure printing machine, a dedicated varnishing machine, or the like. That is, in the oxidative polymerization dry type, resins such as phenol resin, maleic acid resin, hydrogenated rosin ester, and linseed oil, cinnamon oil, dehydrated castor oil, and other drying oil, and further, a cobalt dryer, and, if necessary, gelation Additives such as agents and extender pigments. For solvent type, low polymerization degree vinyl chloride / vinyl acetate copolymer resin with excellent chemical resistance, oil resistance, water resistance, etc., acrylic ester / styrene copolymer resin with excellent blocking resistance, adhesiveness, etc. In the aqueous type, various acrylic copolymer resins used in the form of colloidal dispersion or emulsion, rosin maleic acid resin with high acid value, resins such as ceramics and their derivatives, auxiliary agents such as alcohols and cellosolves, If necessary, additives such as a water-soluble agent, a plasticizer, a wax, and a moistureproof agent are added. Alternatively, in the thermosetting type, it is a thermosetting polyurethane varnish composed of a polyisocyanate polymer and a polyol. Among these OP varnishes, it is more preferable to use an ultraviolet curable type. This is because it is an ultraviolet curable varnish having the same composition as that of the vehicle of the ultraviolet curable ink, which is dried quickly by irradiation of ultraviolet light without heating and has excellent stability and various resistance of the coating layer.

[0010]

[Function] A desensitizing ink is applied to a portion of the front surface of the pressure-sensitive copying lower sheet or the middle sheet which does not need to be copied to reduce the function of the developer, and at the time of printing / writing on the back side of the upper sheet or the middle sheet. By providing a coating layer composed of a desensitizing ink or OP varnish that covers the coloring agent capsule coating portion on the coloring agent capsule coating portion facing the copy unnecessary portion, the coloring agent capsule is protected by the coating layer, Prevents destruction of the capsule due to printing pressure and writing pressure during copying, or even if it is destroyed, the color developer is enclosed in the coating layer, thus desensitizing by synergistic action with the desensitizing ink applied to the developer surface. The effect will increase.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to FIG. 1, which is a schematic enlarged sectional view of a pressure-sensitive copying form for OCR, which is an embodiment of the present invention. The pressure-sensitive copying form 1 for OCR of the present embodiment is a pressure-sensitive copying upper sheet (N40 upper image / Mitsubishi Paper Mill) 2, middle sheet (N40 medium image scan / Mitsubishi Paper Mill) 3, lower sheet (OCR55 lower scan). / Mitsubishi Paper Mills Co., Ltd. 4), and the three sheets of copy paper are constructed by binding one edge corresponding to each other with glue 5. Further, cut-off sewing lines 6 are provided on the respective sheets at positions vertically corresponding to the inside of the bound portion.

First, the lower paper 4 is formed by coating the surface of the base material with the developer 7 in an amount larger than that of the usual paper. Then, on the surface of the paper, a printing section 8 composed of a copy entry column printed with normal ink or non-lead ink for OCR and / or lead ink, a guide text, etc. is written on the upper paper 2 and the middle paper 3. It is provided corresponding to the column, and further, an oxidation polymerization type desensitizing ink (804-6 / manufactured by Teikoku Ink Co., Ltd.) 9 having the receptivity of the seal red meat is applied to a predetermined portion, and this is used as a seal stamp portion. A copy unnecessary portion 10 is provided.

Next, the middle paper 3 is coated with the same color developer 11 as the color developer 7 of the lower paper 4 on the surface of its base material, while
The back surface of the base material is coated with a color-forming agent capsule 12 enclosing a special dye that forms a copy-colored image that absorbs a wide range of light wavelengths. Then, on the surface of the paper, a printing section 13 including a copy entry field printed with normal ink or non-lead ink for OCR and / or lead ink, or a guide text corresponds to the entry field of the upper paper 2. Further, a desensitizing ink (804-6 / manufactured by Teikoku Ink Co., Ltd.) 14, which has the receptivity of the seal stamp, is applied to the same portion as the lower sheet 4, and the copy-free portion is the seal imprinting portion. 15 are provided. On the other hand, on the back of the paper,
Ultraviolet curable OP varnish (L carton OP varnish / TOKA) so as to cover the coloring agent capsule application section 16 at a position facing the copy unnecessary section 10 provided on the surface of the lower sheet 4.
A coating layer 18 made of 17 is provided.

On the back surface of the base material of the upper paper 2, the same color former capsules 19 as the color former capsules 12 of the middle paper 3 are provided.
Is applied. Then, on the back surface of the paper, the same OP varnish as the OP varnish 17 of the middle paper 3 is provided so as to cover the color-forming agent capsule application portion 20 at a position facing the copy unnecessary portion 15 provided on the front surface of the middle paper 4. 21
A coating layer 22 made of is provided, and a printing section 23 on which entry fields, notes, etc. are printed is provided at an appropriate position on the surface of the sheet.

That is, in the present embodiment, the copy-needed portions 15 and 10 of the middle sheet 3 and the lower sheet 4 are formed by applying the desensitizing inks 14 and 9 at the application amounts as in the normal desensitizing treatment, and In the upper sheet 2 and the middle sheet 3, the coloring agent capsule application sections 20 and 16 which are in contact with the copy unnecessary sections 15 and 10 are covered with the coating layer 2 including OP varnishes 21 and 17, respectively.
By coating the coloring agent capsules 2 and 18 with the coating layers 22 and 18, the coloring agent capsule application portions 20 and 16 are protected by the coating layers 22 and 18, and the coloring agent capsules are prevented from being destroyed by the writing pressure at the time of copying. It is contained in the coating layers 22 and 18, and thus the desensitizing effect is enhanced by the synergistic action with the desensitizing inks 14 and 9. The copied color image formed by the writing pressure has the absorption characteristic of the light wavelength and the color density corresponding to the OCR, so that the OCR can be read.

The present invention is not limited to the above-described embodiment, and for example, a desensitizing ink may be applied instead of the OP varnish on the surface of the color-developing agent capsule where the copying is not required. The color-forming agent capsule, the color-developing agent, the desensitizing ink, and the OP varnish of each sheet do not necessarily have to be the same, or a printing section can be provided on the back surface of each sheet. The number of constituent sheets of the pressure-sensitive copying form to which the present invention is applied is not limited to three, and it is not always necessary to constitute only the pressure-sensitive copying sheet, and a general sheet is incorporated. You may.

[0017]

According to the present invention, the function of the developer is reduced by applying a desensitizing ink to a portion of the front surface of the pressure-sensitive lower sheet or the middle sheet which does not need to be copied, and at the same time, on the back side of the upper sheet or the middle sheet, When printing or writing, a coating layer made of desensitizing ink or OP varnish that covers the coloring agent capsule coating portion is provided at the coloring agent capsule coating portion that contacts the copy unnecessary portion, so that the coloring agent capsule is covered by the coating layer. It is protected and prevents destruction of the capsule due to writing pressure and printing pressure during copying, or even if it is destroyed the color developer is enclosed in the coating layer, resulting in synergy with the desensitizing ink applied to the developer surface. The desensitizing effect is enhanced by the action, and therefore, the amount of desensitizing ink applied to the surface coated with the developer is the same as that in the usual case, or the desensitizing ink has a sufficient desensitizing function even if it is less than the usual amount. Advantages can be obtained such-off and blocking problems, or not constrained to the selection of the type of OCR lead ink.

[Brief description of drawings]

FIG. 1 is a schematic enlarged sectional view of a pressure-sensitive copying form for OCR according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Pressure-sensitive copying form for OCR 2 ... Pressure-sensitive copying upper paper 3 ... Pressure-sensitive copying paper 4 ... Pressure-sensitive copying lower paper 5 ... Adhesive 6 ... Cutting machine 7, 11 ... Developer 8, 13, 23 ... Printing Part 9, 14 ... Desensitizing ink 10, 15 ... Copy unnecessary part 12, 19 ... Coloring agent capsule 16, 20 ... Coloring agent capsule application part which contacts the copy unnecessary part at the time of printing / writing 17, 21 ... Overhead varnish 18, 22 ... Coating layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G06K 19/00

Claims (2)

[Claims] 1. A pressure-sensitive copying upper sheet having a back surface of a paper base material coated with a color former capsule, and a middle paper having a front surface and a back surface of a paper base material coated with a color developer and a color former capsule, respectively. Is a pressure-sensitive copying form having a structure in which any of the following is formed by superimposing a color developer on the surface of a paper substrate. The desensitizing ink is applied to the copy-unnecessary portion of the paper surface, while the color-forming agent is applied to the color-forming agent capsule-applied portion that is in contact with the copy-unnecessary portion at the time of printing / writing on the back surface of the upper paper or the middle paper. A pressure-sensitive copying form subjected to desensitization, characterized in that a coating layer made of desensitizing ink or overprint varnish for coating the capsule application portion is provided. 2. A copy color image formed by a contact reaction between the color developing agent and the color developing agent on each of the pressure sensitive copying papers has a light absorption characteristic according to an optical character reading device, and The pressure-sensitive copying form subjected to the desensitization process according to claim 1, wherein the pressure-sensitive copying form has a suitable color density and is selected from a combination that can be read by the reading device. .