JPH0279850A - Opaquing method and opaquing material - Google Patents

Abstract

PURPOSE:To stabilize the quality of copies or characters formed through a process film, etc., by using a heat sensitive transfer material provided with electroconductivity to either one of a plastic film layer constituting a base body or a heat fusible ink layer contg. a light shielding material. CONSTITUTION:Heat transfer is executed by using a heat sensitive material 42 provided with electroconductivity to either one of a plastic film layer constituting a base body or a heat fusible ink layer contg. a light shielding material. In this case, the surface electric resistance of the layer provided with electrconductivity is preferred to be <=10<10>ohm. The heat sensitive material is obtd. by providing a transfer material contg. a light shielding material such as a pigment or a dye together with heat-fusible film-forming material permitting heat transfer at 50-130 deg.C, on a base film. The light shielding layer is preferred to have necessary resistance in an environment of operation to be influenced on a process film, etc., after it is transferred or added to unnecessary parts for pattern forming of the process film, etc. Suitable light shielding layer matching each operational environment may be selected. Thus, the quality of copies or characters formed through a process film, etc., can be stabilized.

Description

Detailed Description of the Invention "Objective of the Invention" (Industrial Field of Application) The present invention aims to eliminate necessary light-transmitting or reflective parts or unnecessary parts (non-image parts) which are image parts in a plate-making film, etc. All or part of the detected image except for one part,
Alternatively, the present invention relates to an opaque method and material for providing a light-shielding layer by directing a light-shielding means to an unnecessary portion. In particular, it relates to a method or material that suppresses the generation of static electricity when handling a film.

(Prior art) Conventionally, in plate-making work, the work involves shielding unnecessary light-transmitting or reflective parts (defective parts) caused by the glue being used, dirt on the plate base, dirt on the exposure device, etc. This is the process of dividing lines by color. As a light shielding method (opaque) for plate-making films, etc., there are known methods of using a mask sheet and a method of applying a correction liquid. In the method of using a mask sheet, a removable red layer or the like is formed on a polyethylene terephthalate film, and the film is cut out or the like to block light. However, most of the light blocking work is done manually, and the use of mask sheet materials increases the number of work steps, and the quality of manuscripts, characters, etc. formed from plate-making films deteriorates due to light diffusion due to the thickness of the mask sheet. It has the disadvantage of occurrence.

On the other hand, the correction liquid coating method uses a light-shielding liquid (correction liquid) in which a vehicle contains a light-shielding agent such as carbon black. This method is superior to the method using a mask sheet in that the applied light shielding layer is thin. This correction liquid application method has the disadvantage that it is difficult to shade small areas because the coating is done with a brush, and it is a manual process that takes an hour, and that it is labor-intensive for the light shielding process.

Also, in terms of detecting unnecessary light-transmitting or reflective parts in plate-making films, etc.

There are printed matter inspection equipment or printed circuit board inspection equipment.
These devices store the actual sample for inspection or sample images input from a television camera, etc. in the device using electronic (electrical) storage means, and sequentially scan the constituent images for each inspection item. Alternatively, the inspection objective is achieved by comparing and verifying with a sample sample using an appropriate method.

These devices have the advantage of quickly and stably setting information for inspection or testing, and streamlining the production of printed matter. It cannot be used for detection because there is no inspection sample, that is, the inspection sample is a block mount or the like. In other words, there has been a desire for a device that can block unnecessary parts from light without requiring a standard sample.

Furthermore, JP-A-62-275265, JP-A-63
A device that attempts to automate the opaque work, as disclosed in Japanese Patent No. 32552, is also being considered, but it requires an inspection sample. Or it is an improvement on the conventional correction fluid application work. It is not necessarily an automated or simplified device.

First, in consideration of the drawbacks of such conventional methods, we developed an apparatus for plate-making work that blocks unnecessary light-transmitting or reflective parts of a plate-making film or the like.

For example, a device that blocks light other than the necessary light-transmitting or reflective portions of an object such as plate-making film or photographic paper on which one image has been formed, and is a means for detecting the presence of the object. Means of transportation.

Means for exposing the object being transported, means for receiving transmitted light or reflected light from the exposed object.

A means for storing information from the light receiving means for a desired area of the object, a means for detecting an image portion or an unnecessary portion using the information stored in the storage means, and a means for detecting the object being conveyed by passing through the detection means. This automatic opaque device has means for blocking light from areas other than the detected image portion or unnecessary portions. This device automated the opaque work, saving labor and stabilizing quality.

With this device, opaque work is performed directly on the object using a heat-sensitive transfer material, etc.9 However, when using a normal heat-sensitive transfer material, the object may be a plastic film such as a plate-making film, and the film may be damaged due to the generation of static electricity. This may cause problems such as problems such as problems with conveying and discharging the heat-sensitive transfer material, and problems such as problems with feeding the heat-sensitive transfer material, entrainment, and generation of sparks.

"Structure of the Invention" (Means for Solving the Problems) The present invention detects an image portion or an unnecessary portion such as a pinhole of an object such as a plate-making film or photographic paper on which one image has been formed, and In a method of forming a light-shielding layer by thermal transfer using a heat-sensitive transfer material having a plastic film layer as a support and a heat-melting ink layer containing a light-shielding agent in a small amount (both a plastic film layer as a support and a heat-melting ink layer containing a light-shielding agent) in a non-image area or an unnecessary area,
This is an opaque method in which thermal transfer is performed using a heat-sensitive transfer material in which one of the layers is imparted with conductivity. In addition, to detect image portions or unnecessary portions such as pinholes of objects such as plate-making films and photographic papers on which images have been formed, and to form a light-shielding layer on non-image portions or unnecessary portions of the object. The present invention relates to a heat-sensitive transfer material having at least a plastic film layer as a support and a heat-melting ink layer containing a light-shielding agent, in which one of the layers is imparted with electrical conductivity. Furthermore, it is an opaque material in which the plastic film layer is imparted with electrical conductivity, or a conductive intermediate layer is formed between the plastic film layer and the heat-fusible ink layer. Or it relates to an opaque material whose light-blocking agent is a dye. It is preferable that the surface electrical resistance of the layer imparted with conductivity is 10I0Ω or less.

In the present invention, conductivity is imparted to either a plastic film layer or a heat-fusible ink layer as a support, or a plurality of heat-fusible layers or ink layers as a heat transfer layer. Alternatively, a non-transferable conductive layer is provided between the plastic film layer and the hot-melt ink layer. By imparting conductivity, the generation of static electricity is suppressed, and there is no problem in conveying or discharging the target material such as plate-making film, and it also prevents problems such as getting caught in the device during thermal transfer feeding. It is something.

As a heat-sensitive transfer material, at least one layer contains a light-shielding agent such as a pigment or dye and a heat-melting film-forming material, and
A transfer material that can be thermally transferred at about 130°C is provided on a base film. A light shielding agent such as a pigment or a dye satisfies light shielding conditions in the exposure work, which is a post-process using a plate-making film, photographic paper, or the like.

The light-shielding layer preferably has the necessary resistance in the working environment to which the film for plate-making etc. is subjected after being transferred or applied to unnecessary parts of the film for plate-making etc.

You can select a light shielding layer that suits your work environment.

The basic structure of the heat-sensitive transfer material of the present invention includes base film (support)/heat-melt ink layer, base film/heat-melt layer/heat-melt ink layer, and base film/heat-melt layer. / ink layer / heat-fusible layer 9, etc., and further includes an undercoat layer such as a back coat layer provided on the back side of the base film and a release layer provided between the base film and the transfer layer. Formed as needed. The present invention imparts electrical conductivity to at least one of the nine or more layers.

The base film of the thermal transfer material is polyester film,
Plastic films such as polycarbonate film and polyimide film are used.

The ink layer consists of carbon black, titanium oxide, iron oxide,
Pigments such as zinc oxide, azo pigments, phthalocyanine pigments, or azo or anthraquinone pigments.

Dyes such as indigoids, paraffin wax or natural wax, ethylene vinyl acetate copolymer,
Thermoplastic resin 9 dispersant such as polyamide.

It is obtained by appropriately selecting an active energy ray-curable compound, a photopolymerization initiator, etc. as the case may be, and subjecting them to 61 combinations.

The ink layer can usually be applied by hot melt coating, but in some cases, the above hot melt ink composition can be dispersed in a solvent and applied by gravure coating. The thickness of the heat-fusible ink layer 13 is preferably 1 μm to 20 μm.

The heat-melting layer includes waxes, fatty acids, fatty acid amides, aliphatic ketones, aliphatic amines, and fatty acid esters.

This layer is mainly composed of other low molecular weight heat-melting compounds such as carnauba wax, montan wax, rice wax, paraffin wax, microcrystalline wax, and polyethylene wax.

This layer contains lauric acid, stearic acid, etc. Furthermore, a composition formed by blending resins, additives, solvents, etc. as necessary is applied using a coating machine or a printing machine by hot melt coating, gravure coating, etc. to form a heat-fusible layer.

To impart conductivity to any layer of a thermal transfer material, metal powder, metal compound powder, carbon black, surfactant, etc. must be added or kneaded, or a coating liquid containing these conductivity imparting agents must be added. Apply. Furthermore, in the case of metals, metal compounds, etc., conductivity can be imparted by means of thin film formation such as vacuum evaporation or sputtering.

As an example of imparting conductivity, a coating liquid containing a conductivity imparting agent and a film-forming resin is applied to a base film, which is a support, and the conductivity imparting agent is added to a hot-melt ink layer.

A conductivity-imparting agent is kneaded into the base film, a metal or a metal compound is vapor-deposited onto the base film, and so on.

One guideline for conductivity is surface resistivity (Ω).
There is a normal IQ of 1 for polyester films, etc.
It shows a large value of s~1017Ω and is easily charged. Generally, when it is less than IQIOΩ, it becomes difficult to charge.

For an explanation of examples of opaque devices, see April 2, 1986.
P1 will be briefly explained below.

A device that blocks light other than the necessary light-transmitting or reflective portions that are the image portions of an object such as a plate-making film or photographic paper on which an image has been formed, and is a means for detecting the presence of the object and for transporting the object. means for exposing the object being transported, means for receiving transmitted light or reflected light from the exposed object, and means for storing information from the light receiving means for a desired area of the object.

means for detecting an image portion or an unnecessary portion based on the information stored in the storage means; passing through the detection means; 11! This is an opaque device that has means for detecting the object being sent, and means for blocking light from parts other than the detected image part or unnecessary parts.

The detection means stores information from transmitted light or reflected light from a desired area of the object, and means performs detection by comparing adjacent pixels at a detection pitch according to each pixel based on the obtained information. This is an opaque device that can block light without setting a reference position in advance by means of detecting an object provided in front of the light blocking means.

Using the above-mentioned device, determine in advance a light-shielding position based on a means for detecting the presence of an object, information from the detection means, information from a means for detecting an object that has passed through the detection means, and transport distance and/or transport speed. It is possible to automatically shade areas that should be shaded without the need for opaque.

We focused on the fact that in order to block unnecessary light-transmitting or reflecting parts of plate-making film, etc., it is sufficient to detect the formed image (the necessary part) and then block the other parts, that is, the unnecessary parts. , or by detecting unnecessary parts such as pinholes and blocking light from these unnecessary parts.Compared to the conventional method of using a mask sheet or applying correction liquid, the method of plate making (opaque printing) is simpler, faster, and more accurate. ) can be done,
Moreover, it is a device that can be operated without the help of a skilled person.

The opaque device is a device that detects, transmits Ijfi, exposes, receives light, stores information, detects, detects, and blocks light from a light-shielded object. That is, the object is detected, 9 image parts or unnecessary parts are detected, a light-blocking part is determined, and the light-blocking part is filled in.

The detection means is a combination of a small light source and a phototransistor that blocks the light from the object.

A means of activating a microswitch by touching it with an object.

Alternatively, it may be a means for activating a microswitch by an object pushing up a roller.

Examples of the conveyance means include a roller driven by a drive means such as a pulse motor, and a counter roller that forms a nip with the roller and conveys the object. Note that the drive is not limited to the pulse motor, and may be driven by a motor using a rotary encoder.

The exposure means may be any means that can expose with the desired accuracy and obtain information through the exposure.

For example, exposure may be performed by providing a slit between the light source and the object, or exposure 1 in which the light from the light source is sharp and has a desired width.
etc. The exposure means is not particularly limited as long as the light can be received by the light receiving element; for example, an LED array, a tungsten lamp, a fluorescent light, a xenon lamp, etc. can be used.

As the light receiving means, a commonly used light receiving element can be used. Various types of light receiving elements can be used. For example, CCD contact image sensors, photo multipliers, photoconductive image pickup tubes such as vidicon,
Photodiodes, phototransistors, solar cells, etc. can be used. In particular, the CCD contact image sensor 9, such as the CIPS304MS1 manufactured by Raiyu, is an excellent light-receiving element because it can increase the speed at which a plate-making film passes through a preset detection area.

During detection, an appropriate enlarging or reducing lens system can be used as needed, thereby improving the detection ability and simplifying the apparatus. This improves the resolution of the light receiving element, that is, the degree to which it detects the necessary area.

Various settings are possible depending on the combination with the lens system used.

Detection of pixels of a plate-making film or the like may be performed by using a plurality of light receiving elements, or by using a single light receiving element or a plurality of light receiving elements, which are moved to receive transmitted light or reflected light.

The means for storing information obtained by the light receiving means for a desired area of the object may be any memory that can be written to and read from.

A computer can be used as the detection means.

The image forming device serving as the light shielding means is a thermal transfer device.

In addition to the plate-making film, examples of objects such as the film for plate-making according to the present invention include negative or positive monochrome or color films, mounts for second printing paper, and the like.

The detected image part or unnecessary part becomes location information,
A portion other than this position or an unnecessary portion, ie, a non-image portion, is shielded from light by the thermal transfer device. In addition, when performing light shielding, 9 image areas and non-image areas are accurately divided and light can be shielded according to this division, but the image formation of light shielding is generally an area that requires sharpness compared to images on plate-making film, etc. It is preferable to make the image part thicker and to make the light-shielding part, which is a non-image part, slightly thinner for light-shielding. Furthermore, when detecting an unnecessary portion, for safety reasons, it is also possible to make it slightly thicker and block light so that it does not cover the image portion.

The configuration of the opaque device includes a means for detecting the presence of an object;
Means for conveying the object, means for exposing the object being conveyed, light receiving means, and storage means 1 detection means.

It has a detection means and a light shielding means, and it is not only an integrated device including these means, but also a device that combines a detection means or a device including a detection means with a detection means and a light shielding means. (Furthermore, devices including each means may be combined.

Also, instead of setting the pixel size and detection pitch in advance as necessary, input means to change these can be used.
It may be possible to set it each time. The pixel size is usually determined by the light receiving element, but it can also be changed.

For simplicity, the adjustment may be made in units of multiples of the size of the light receiving element. Furthermore, the detection pitch can also be performed pixel by pixel, such as detecting every two pixels. The detection pitch can of course be fixed or variable.

The input means is not particularly limited as long as it can input a 9-pixel size, but a keyboard or the like can be used.

By retaining information from this scanning by some means for at least one scanning line and setting in advance that, for example, non-independent pixels in three scanning lines are necessary light transmission or reflection parts, Detection becomes possible. Therefore, by examining and verifying pixel information from one scanning line or more than one scanning line using an appropriate method, a necessary portion can be determined. In other words, in the image that is an originally necessary part of the image, the pixels of the original image part do not exist independently, and those that exist independently are unnecessary parts, so the information of the pixels before and after, or on the left and right by scanning. It can be determined from

In addition, in a film for plate making that consists only of a unit image 1, such as an image of a fixed size such as a character, an unnecessary part larger than the unit image is generated when the unit images exist continuously, that is, when the pixels are If it exists continuously for more than a unit image, it can be recognized as an unnecessary part.

In addition, the original image part of plate-making film, etc. is continuous, and in the printing plate made from plate-making film, etc., it becomes halftone dots, but roughly speaking, plate-making film, etc. Alternatively, pixels on photographic paper or the like correspond to halftone dots on a printing plate.

Further, the information is stored in the memory at the timing of an image scanner or the like, and read out at the timing of the light shielding device.

Furthermore, the data read from the memory at the timing of the light shielding device is converted into a control signal for the head of a thermal printer, which is an example of the light shielding device, and the temperature of the thermal head is controlled by controlling the pulse.

When making a determination in detection, investigation and verification may be performed by simple computer processing such as 4-connection or 8-connection of pixels. This connection method allows detection of pixels that are necessary light-transmitting or reflective parts of plate-making film or photographic paper. Of course, the determination may be made using other methods.

As the detection means according to the present invention, there are two cases: detecting a portion of the original image and detecting an unnecessary portion, but the detection of two image portions is better than the case of detecting an unnecessary portion. It has the advantage of requiring a small storage capacity. In general, the image area of a plate-making film is often smaller than the non-image area, and the detection target is larger than a pinhole, etc., so a light-receiving element (sensor) that is the detection means must have a fine density. Therefore, the detection means according to the present invention can perform the detection with a storage capacity of about 115 to 1/20.

The detected image portion is held in a storage device as position information, and portions other than this position, that is, non-image portions, are shielded from light. In addition, when blocking light.

Image areas and non-image areas can be accurately divided and light can be blocked according to this division, but since images such as plate-making films often require sharpness, the necessary image areas may be thickened, and even the non-image areas may be thickened. It is preferable that the light-shielding portion, which is the image portion, be slightly narrowed to shield light.

For this operation,9 For example, verify the brightness gradient of 4 pixels, or verify the Laplacian value of 9 pixels, 1For example, if the absolute value of 4 pixels is positive and the Laplacian value is negative, then The edge of the required pixel will be at the center position of verification,
By setting a predetermined number of necessary pixels around this necessary pixel, it is possible to make the area thicker.

After the detection means detects the necessary light-transmitting portion or reflective portion, a light-shielding layer can be immediately provided on the plate-making film or the like except for this portion. Generally, the detection means and the light shielding means are separated. Therefore, without causing any misalignment,
Must be shaded from light. It is possible to shield light without performing positioning in advance, that is, without necessarily having to detect and process the detection in advance, store the detected position in any means, and perform positioning or registration. Desirably.

This is a necessary method for continuous processing.

In the present invention, the object detection means and the detection means
The distance or position of the portion to be shaded from the detection of the target object can be automatically determined from the conveyance distance and/or conveyance speed. Furthermore, the distance or position at which light shielding should start is automatically determined from the distance or position already determined by the detection means provided in front of the light shielding means, and no special processing such as positioning is required. You can block out light without having to worry about it.

To detect the necessary light-transmitting or reflective parts of plate-making film, etc., and providing light-shielding material in areas other than these parts,
Or to detect unnecessary parts and apply light-blocking material to these parts, from detection to position determination.

However, the process must be completed before the plate-making film, etc. to be detected passes through and reaches the light-shielding layer applying means.

Before reaching the part to be shaded, the type of computer process used and the processing language used (e.g.
There is no limit to the processing speed of the assembler, etc.).

As a thermal transfer device, a normal thermal transfer printer can also be used.9 Depending on the position information, the process can be performed immediately or after a variable predetermined time.

Form a light shielding layer.

Next, the present invention will be explained based on one embodiment, but the present invention is not limited to this embodiment.

This is clear from the above explanation.

FIG. 1 is a cross-sectional view for schematically explaining the apparatus and method of the present invention.

The object 1, which is a plate-making film, is transferred to an automatic opaque device 1.
It is inserted into the entrance 11 of 0. When inserted, the detection means 12
Detection and transportation of the target object are started. In addition,
Although the drive for transporting the object 81 may be operated continuously from the time the power is turned on, it is preferable that the transport is started from the insertion of the object. Reference numeral 21 indicates a roller which is one of the conveying means. 1
3 is a detection means (sensor) that serves as a reference for determining the position. Although the automatic operator 10 shown in FIG. 1 is provided with detection means 12 and 13, it is also possible to use a single detection means. Detection by the detection means 13 has a function for positioning. In other words, it can also serve as a reference for information on the start of detection, and position information based on the next exposure, light reception, and detection. Note that a mark indicating the reference position provided on the object in advance may be used.

Exposure is performed on the object being transported. In the example shown in Figure 9, the exposure means comprises an illumination light source 14 and a slit 15.

The light-receiving means includes a mirror 16 that allows light from the exposure means (transmitted light is shown in FIG. 1, but it goes without saying that one reflected light may also be used) to enter the light-receiving element, and a camera 17 that is the light-receiving element. It is.

As a storage means and a light receiving means, the detection controller 3
1. Arithmetic unit (CPU) 32. It has a storage means 34 and an auxiliary storage means 35.

The object 1 that has passed through the light receiving means is detected by the detection means 18 provided in front of the light shielding means. This detection also serves as a reference for determining the light blocking position.

Information from detection by the detection means 13 serves as a reference.

Based on this reference, the position of the detected image information can be automatically set based on the conveyance distance or conveyance speed. In other words, the distance from the starting point by the detection means 13 can be determined, and this positional information is stored.

By inputting the information to the light shielding means together with the coordinate information of the object from the detection means, light shielding can be performed without prior positioning. Detection by the detection means 18 provided in front of the light shielding means allows automatic processing from this reference information and the detected position information. Note that the distance between the detection means 13 and the exposed location and the distance between the detection means 18 and the light shielding means 40 do not necessarily have to be the same.

The light shielding means is a thermal transfer printer 40 for shielding light based on 9 position information. The thermal transfer printer 40 mainly consists of a thermal head 41 and a thermal transfer material 42, and based on the position information, instructions are given to the thermal head 41 of the thermal transfer printer,
Form a light shielding layer. In other words.

Based on the positional information, the thermal head 41 applies a light-shielding layer to the object 1 to be inspected from a heat-sensitive transfer material 42 that is a light-shielding material. Note that 43 is an unwinding roller for supplying the thermal transfer material 42, 44 is a roller for winding up the used thermal transfer material 42,
shows. Further, the roller 23 serves not only as a conveying means but also as a platen of a thermal transfer means.

In the present invention, in order to further suppress the generation of static electricity, after thermal transfer is performed, a conductive roller 50, which is an example of static electricity removal means, can be brought into contact with the plate-making film at a speed consistent with the conveyance speed.

For light shielding, the two thermal heads 41 are heated based on the position information, the transfer material (light shielding material) is thermally melted or softened, and a light shielding layer is formed in areas other than the detected image area or unnecessary areas.

In plate-making films etc. that are light-shielded by the heat-sensitive transfer material according to the present invention, the light-shielding layer has good adhesion and abrasion resistance, and is completely light-shielded. Therefore, even in the post-process, peeling does not occur even when the material is handled in the same manner as in conventional manual work for shielding light.

A target object 1 such as a plate-making film is transported to an exposure and detection means by a conveyance means including a belt, rollers, etc. The exposure and detection means include a fluorescent lamp or an LED array (for transmission), 9 for reflection, that is, for photographic paper, as the illumination light source (exposure means), and a CCD light receiving element, etc. (detection means) arranged at right angles to the transport direction. The input means 33 is connected to the CPU 32, and the exposure means is operated according to instructions from the detection controller 31 via the CPU 32 based on the input size and detection pitch. Image information of the object, which is information from the detection means, is sequentially transferred to a memory 34 under the control of a CPU (computing unit) 32.
is memorized. Note that in the device according to the present invention, C
PU32 is not necessarily essential, but in some cases.

It is also possible to have an apparatus that does not include a CPU.

Note that the conveying means operates for the purpose of holding the object.

In this example, a rotary encoder is used to check the operation. When the amount of information stored in the memory 34 reaches the equivalent of three lines in the direction perpendicular to the conveyance, the comparator 50 compares the information of the four connected pixels shown in FIG. Determined by value. If the part is determined to be a necessary part by this comparison and determination, the corresponding coordinate information is stored in the sub-memory 35.

In the device of the present invention, the detection pitch is determined in advance for each pixel.

can also be set to every other pixel, etc.

The number of pixels referred to for determination may be the same9.For example,
When the characters to be detected become larger, the coarser number of pixels, that is, the number of pixels per character, etc., can be the same than when detecting small characters. Even if the size is different from the normal one, the processing time required for detection and light shielding is the same as in the normal case.

In other words, the processing time remains the same whether it is a small image unit (such as 9 characters) or a large image unit. That is, this is because the number of reference pixels is the same.

9 In addition, in the present invention, the pixel size can be set in advance, but the size of the characters, etc. forming the image 9 For example, a series or point Use comparisons, etc.

Although it can be automated, it is not necessarily limited to this, and it is also possible to manually determine the size of one pixel and the detection pitch using a keyboard. In addition.

For normal characters, the size of nine pixels may be approximately 400 μm. In addition, when detecting two images, the exposure intensity is used.

It is also possible to set periodic changes in the exposure intensity, and this exposure change condition is effective in detecting and identifying the required portion more quickly. What is the pixel size and detection pitch?

Input from a keyboard, etc. The input size is CP
It is set in the detection means via U. In the present invention, the pixel size setting is based on the size input from the keyboard.
Calculated in PU. Even with the CPU.

You can change the reference pitch and memorize the size.

Detection is usually performed by changing the detection pitch (width) of the opaque device.

In addition, as an example of changing the detection pitch, input means '3
3 to set the detection pitch.

It is also possible to allow the CPU 32 to perform calculations.

In addition, changes in the exposure conditions for the detection means mainly involve changes in the exposure intensity in the 2-hour (transportation of the inspected object) direction, and changes in the brightness of the light source cause differences in the degree of detection by the detection element such as pinholes. It has the effect of causing That is,
The detection darkness value of the detection element is determined by the intensity and time of the light incident on the detection element, but the exposure intensity can be changed (dimmer) according to preset conditions by using this intensity and time. This makes it easier to determine the original images such as pinholes and letters.

The light shielding section 40 mainly includes a thermal head 41 and a thermal transfer material 42. Based on the AND result of the position information of both the sub-memory 35 and the inspection target, the thermal head is heated and the transfer material is thermally melted.

A light shielding layer is formed on the detected unnecessary portion.

Next, the results of opaque using the following thermal transfer materials are shown.

(Thermal transfer material A) 30 parts of iron oxide (trans oxide red manufactured by Hilton Davis, USA), 10 parts of conductive carbon black (Toka Black 4300 manufactured by Tokai Carbon Co., Ltd.), 30 parts of carnauba wax, 10 parts of rice wax, ethylene-acetic acid 15 parts of vinyl copolymer was melt-kneaded and dispersed at 90°C,
A hot melt ink was obtained.

Thermal transfer material A was obtained by applying hot-melt ink at 90° C. to a thickness of 5 μm using a wire bar on a polyester film having a thickness of 6 μm (micrometer).

Thermal transfer material A was mounted on the apparatus shown in FIG. 1, and opaqued onto a negative film for plate making. Almost no static electricity was observed on the heat-sensitive transfer material, plate-making film, etc. after completion of the opaque process, and there was no problem in transporting the heat-sensitive transfer material, winding up the heat-sensitive transfer material, etc.

(Thermal transfer material B) 20 parts carnauba wax, 10 parts rice wax.

40 parts of ethylene-vinyl acetate copolymer 1(1,) toluene and 20 parts of methyl isobutyl ketone were kneaded and dispersed in a ball mill to obtain an intermediate coating liquid.

Separately, 30 parts of Tranoxide Red, 3 parts of Diakarna
0 (manufactured by Mitsubishi Chemical Industries, Ltd.) 10 parts, paraffin wax 3
0 parts, 10 parts of ethylene-vinyl acetate copolymer, and 10 parts of Toka Black 4300 were melt-kneaded and dispersed at 90°C to obtain a hot melt ink.

The intermediate coating liquid was used as a heat-melt release layer and the hot-melt ink was used as a heat-melt light-shielding ink layer, and the intermediate coating liquid was applied to a 6 μm thick polyester film using a wire bar to a thickness of 2 μm, dried, and then Apply hot melt ink on top of it with a wire bar to a thickness of 5 μm,
A laminated thermal transfer material B was obtained.

Opaqued in the same manner as thermal transfer material A.

Good results were obtained.

(Thermal transfer material C) 10 parts of Toka Black 4300, polyester resin (
15 parts of Byron 200 manufactured by Toyobo Co., Ltd., 30 parts of toluene, and 45 parts of methyl ethyl ketone were kneaded and dispersed in a ball mill to obtain an intermediate coating liquid.

Separately, dye (Oil Red 5B manufactured by Orient Chemical Co., Ltd.) 4
0 parts of carnauba wax, 20 parts of rice wax, and 10 parts of ethylene-vinyl acetate copolymer were melt-kneaded and dispersed at 90° C. to obtain a hot melt ink.

The intermediate coating liquid was used as a conductivity imparting layer and the hot melt ink was used as a heat-melting light-shielding ink layer, and the intermediate coating liquid was applied to a 6 μm thick polyester film using a wire bar to a thickness of 2 μm, dried, and then Hot-melt ink was applied thereon with a wire bar to a thickness of 5 μm to obtain a laminated thermal transfer material C.

When opaqued in the same manner as thermal transfer material A, the conductivity imparting layer of the intermediate coating remained on the polyester film.

The heat-melting light-shielding ink layer of the hot-melt ink is thermally transferred to the negative film for plate-making, and almost no static electricity is generated on the thermal transfer material, film for plate-making, etc. after opaque printing is completed.
There was no problem with conveyance, winding up, etc.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing one embodiment of the apparatus of the present invention. The symbols in the figure are 1-object, 10-automatic obake device,
11-population, 12,13,18-detection means. 14.15-Exposing means, 16.17-Light receiving means, 19-
Exit. 21, 22, 23, 24-transporting means, 31-detection controller, 32-arithmetic device, 33-human power means, 34
-Storage device, 35-Auxiliary storage device, 40-Light shielding means, 5
〇-Static electricity removal means, respectively.

Claims (1)

[Scope of Claims] 1. Detecting an image portion or an unnecessary portion such as a pinhole of an object such as a plate-making film or photographic paper on which an image has been formed;
In a method of forming a light-shielding layer on a non-image part or unnecessary part of the object by thermal transfer using a heat-sensitive transfer material having at least a plastic film layer as a support and a heat-melting ink layer containing a light-shielding agent. , an opaque method characterized by carrying out thermal transfer using a heat-sensitive transfer material in which one of the layers is imparted with conductivity. 2. Detects image parts or unnecessary parts such as pinholes of objects such as plate-making film and photographic paper on which images have been formed,
The opaque material for forming a light-shielding layer on an unnecessary or non-image area of the object is a heat-sensitive transfer material having at least a plastic film layer as a support and a heat-melting ink layer containing a light-shielding agent. An opaque material characterized by having one of its layers imparted with conductivity. 3. The opaque material according to claim 1, wherein the plastic film layer is imparted with electrical conductivity. 4. An opaque material comprising a conductive intermediate layer formed between the plastic film layer and the heat-melting ink layer. 5. The opaque material according to claims 2 to 4, wherein the light shielding agent is a dye. 6. The surface electrical resistance of the conductive layer is 10^1^
The opaque material according to claims 2 to 5, which has a resistance of 0Ω or less.