JPH04307293A - Manufacture of transfer sheet for printing - Google Patents

Abstract

PURPOSE:To manufacture a multi-color transfer sheet for printing containing colors other than a standard color at low cost and rapidly by forming a standard color image using electrostatic recording technique and colors other than the standard color using discharge breakdown technique, based on an electrostatic recording sheet. CONSTITUTION:A transfer sheet for printing 1 of a standard color is prepared using color electrostatic recording technique with sublimable dye and a regist mark. Then the sheet 1 is transported with a recording medium 2 consisting of a sublimable solid ink layer, a light transmissible support and a metal evaporated layer attached closely to the transfer sheet 1. Then the metal evaporated layer of the recording medium 2 is broken down using a discharge breakdown recording head 4 based on data while alignment is being performed by reading a resist mark by a reader 3. Then, a pictorial pattern of any color other than a standard color is added on the transfer sheet for printing 1 which is already prepared in the standard color using discharge breakdown technique.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in transfer paper for textile printing, which is used to transfer and dye a sheet printed with a sublimable dye onto cloth, which is the object to be dyed.

0002

2. Description of the Related Art Traditionally, transfer paper for textile printing has been made by printing printing ink on paper whose surface has been smoothed by adjusting the penetration of the printing ink using the gravure printing method.

0003

[Problem to be solved by the invention] However, gravure printing requires a printing plate, but plates are generally expensive, so if the same plate is used to print a small amount, the plate cost will be high, and in some cases In some cases, there were drawbacks such as problems with delivery times.

On the other hand, there are plateless printing methods that do not use printing plates, such as a method in which ink is directly sprayed onto cloth using an inkjet method, and a method in which an electrostatic latent image is formed on electrostatic recording paper using a color electrostatic recording device and then sublimated. A method of developing and fixing with a toner containing a color dye to obtain a transfer paper for printing is known.

[0005] Among the above-mentioned plateless printing methods, the former generally has a slow printing speed and discharges ink through minute holes, so there are many restrictions on the ink that can be used. In addition, although the latter has a fast printing speed, the toner colors generally used are cyan, magenta, yellow, and black, and it has the disadvantage that it cannot support images that cannot be adequately expressed by combining these four colors. .

[0006]

[Means for Solving the Problems] The present invention provides a printing transfer paper based on electrostatic recording paper manufactured using a color electrostatic recording device with a high printing speed using a plateless method, without making an expensive plate. This adds printing using the electrical discharge destruction transfer method, which is relatively easy and allows the use of ink of any hue. This makes it possible to manufacture transfer paper for textile printing that is expensive and can handle patterns that cannot be handled with a standard four-color ink combination.

[0007]

[Operation] There are various forms of the discharge destruction type transfer recording system, one example of which is the one described in Transfer Recording Medium and Transfer Recording Method (Japanese Patent Laid-Open No. 161445/1983). In the above recording medium, a thermally transferable solid ink layer is provided on a light-transparent support via an intermediate layer containing a photodegradable compound and a photothermal conversion substance, and a heat-transferable solid ink layer is provided on the opposite side of the light-transparent support. A light-shielding metal vapor deposited layer is formed. When printing on a printing material, the metal vapor deposited layer is partially removed according to the pattern to be printed using a discharge breakdown recording device.

Next, by irradiating light from a strobe or the like from the side of the thermally transferable solid ink layer, the light enters the area where the metal vapor deposited layer has been partially removed, and the thermal transferability of the same area is improved. Only the solid ink layer is melted, transferred and fixed to the printing material, and the printing is completed.

By containing a sublimable dye in the thermally transferable solid ink layer and using electrostatic recording paper developed and fixed with a toner containing a sublimable dye on the printing substrate, patterns that cannot be sufficiently expressed with standard four colors can be created. Transfer paper for textile printing is completed.

[0010] When there are two or more hues that cannot be expressed using the four standard colors, the ink hues of the thermally transferable solid ink layer are changed to corresponding hues, and the metal vapor deposited layer is removed;
The process of transferring by light irradiation is repeated.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram of a discharge destruction type transfer recording apparatus using electrostatic recording paper on which a color image is formed as a recording medium according to an embodiment of the present invention. 1 is an electrostatic recording paper on which an image has already been formed with a standard color toner containing a sublimable dye; 2 is a recording medium for recording discharge breakdown (hereinafter referred to as a recording medium); the electrostatic recording paper 1 image forming surface and recording medium 2
Thermal transferable solid ink layers (hereinafter referred to as ink layers) are arranged so as to be in contact with each other.

Reference numeral 3 denotes a registration mark reader which reads registration marks recorded at approximately equal intervals in the direction of arrow A in the transport direction of the electrostatic recording paper 1 on the edge of the image forming surface of the electrostatic recording paper 1, which will be described later. It is a reading device. Reference numeral 4 denotes a discharge destruction recording head, which is driven by a recording medium recording signal to partially remove the metal vapor deposited layer of the recording medium 2. 5 is a roller for pressing the recording medium 2 against the discharge rupture recording head 4; Reference numeral 6 denotes a lamp house, into which light from an internal lamp enters the recording medium 2 from the portion where the metal vapor deposited layer has been removed and melts the ink layer. A roller 7 presses the electrostatic recording paper 1 and the recording medium 2 together. The electrostatic recording paper 1 is wound up by a take-up roller 1', and the recording medium 2 is wound up by a take-up roller 2'.

The recording medium 2 in contact with the electrostatic recording paper 1 is
A conveying means consisting of a drive motor 9 and paper feed rollers 8a, 8a', 8b, 8b' driven by the drive motor 9 moves the arrow A in the forward direction along a predetermined path.
and the opposite direction. A pulse generator 10 is directly connected to the drive motor 9, and generates a PG pulse in accordance with the rotation of the drive motor 9, that is, every time the recording medium 2 in contact with the electrostatic recording paper 1 moves a certain distance.

Along a predetermined path of the electrostatic recording paper 1 on which an image is formed with toner of a standard color containing a sublimable dye, a mark is placed at the end of the image forming surface of the electrostatic recording paper 1 in the transport direction of the electrostatic recording paper 1. Arrow A
In order to sequentially read the registration marks recorded at approximately equal intervals in the direction, a registration mark reader 3 is provided upstream of the discharge destruction recording head 4 in the conveying direction of the electrostatic recording paper 1. A recording medium recording signal is generated in accordance with the reading result of the reader 3, and a discharge destruction recording head 4 is driven to destroy the metal vapor deposited layer of the recording medium 2.

FIG. 2 is a control block diagram of the embodiment shown in FIG. 1, in which a counter 11 generates timing pulses for synchronous recording, and a counter 12 mainly counts timing pulses between read registration marks. 13 is an arithmetic unit. The counters 14 and 14' are for monitoring the interval between the read marks, and the control device 15 controls the operation of these devices.

That is, counters 11, 12, 14,
14', the computing unit 13, and the control device 15 serve as timing control means for aligning the recording position of the discharge destruction recording head 4 in the conveyance direction of the recording medium 2 based on the interval between the registration marks on the electrostatic recording paper 1. It is something that works. The recording medium recording signal drives the discharge destruction recording head 4 every time n PG pulses are received, whereas the registration mark drives the electrostatic recording head 4 every time n×k=N PG pulses are received. It is recorded so that it appears on 1.

Due to the elasticity of the electrostatic recording paper 1, when the length that should originally be fed by N PG pulses is extended to the maximum, N+
If the length is α, then the registration mark reader 3
is the number of PG pulses in front of the discharge destruction recording head 4
They are set apart by α distances.

Hereinafter, the manner of operation of the discharge destruction recording head 4 on the recording medium 2 by this apparatus will be explained.

The control device 15 first sets N+α, which is the number of PG pulses corresponding to the distance between the registration mark reader 3 and the discharge destruction recording head 4, in the counter 14, issues a read start command to the registration mark reader 3, and , the drive motor 9 is rotated in the normal direction, and the recording medium 2 begins to be fed in the direction of the arrow A, and at the same time an operation command is sent to the lamp house 6. When the center of the first registration mark on the electrostatic recording paper 1 comes directly under the registration mark reader 3, the registration mark reader 3 sends a registration mark signal to the control device 15, and the control device 15 receives the registration mark signal. and set value N+α
The counter 14 which has been set and the counter 12 which has been cleared to zero are instructed to start counting PG pulses.

When the center of the second registration mark comes directly under the registration mark reader 3 and the control device 15 receives the registration mark signal, the counter 12 calculates the number of PG pulses, which is the actual value between the counted registration marks. After sending N'(1) to the arithmetic unit 13, it is cleared to zero again and starts counting the number of PG pulses up to the third registration mark. At the same time, N+α is set in the counter 14' which is in a stopped state, and an integer start of the number of PG pulses is commanded. The arithmetic unit 13 that received the number of PG pulses N'(1) calculates N'(1)/k=
Compute n'(1) and hold n'(1).

The number of PG pulses counted by the counter 14 is N
When it reaches +α, a signal is sent to the control device 15 to stop counting. At this time, the center of the first registration mark on the electrostatic recording paper 1 that is in contact with the recording medium 2 being fed in the direction of arrow A has just arrived at the position of the discharge destruction recording head 4.
The control device 15 takes out the first data from the image data storage device 16 and sends it to the discharge destruction recording head 4, partially removes the metal deposition layer of the recording medium 2, and also
n'(1) held in is sent to the counter 11, and the counter 11 is commanded to start operation.

The counter 11 receives the PG from the pulse generator 10.
A timing pulse is emitted every time n' (1) pulses are received, and the control device 15 sequentially retrieves data from the image data storage device 16 every time it receives a timing pulse, and controls the discharge destruction recording head 4 according to the data. send commands to.

In this way, the timing pulse n'(x
) is always set on the counter 11, so that the metal deposited layer of the recording medium 2 in contact with the electrostatic recording paper 1 is partially removed in synchronization with the actually measured length of the electrostatic recording paper.

When the control device 15 reads the information indicating the end of data from the image data storage device 16, it prevents the data from being read even if a timing pulse is received from the counter 11, and also causes the counter 14 to read the discharge destruction recording head 4. The number β of PG pulses corresponding to the distance between the lamp house 6 and the lamp house 6 is set. Thereafter, the drive motor 9 continues to rotate normally to melt the ink layer of the recording medium 2 onto the electrostatic recording paper 1.
When the counter 14 detects the PG pulse number β, the drive motor 9 is stopped.

FIG. 3 shows the electrostatic recording paper 1 and the recording medium 2 during transportation.
21 is a registration mark recorded at approximately equal intervals in the direction of arrow A, which is the conveyance direction of the electrostatic recording paper 1, and at least this registration mark 2
The electrostatic recording paper 1 and the recording medium 2 are conveyed while being pressed into contact with each other so that the electrostatic recording paper 1 and the recording medium 2 are not optically shielded by the recording medium 2.

During electrostatic recording, paper generally expands and contracts due to toner development and fixing, so if two or more colors of toner are used to develop and fix each color two or more times, an electrostatic latent image is formed from the second time onward. In order to prevent color shift during printing, the registration marks 21 are provided to correct the generation of signals to the recording head by measuring the interval between the registration marks 21 to measure the change in length due to expansion and contraction near the latent image forming area. (Refer to Japanese Patent Publication No. 2-62863 entitled "Color Image Recording Apparatus"). Even when the metal vapor deposited layer of the recording medium 2 is destroyed by discharge, the distance between the resist marks 21 is measured and the discharge destruction recording head 4
Correct the signal to.

[0027]

[Effect of the invention] Inkjet ink is extremely sensitive to dust in order to prevent nozzle clogging, and toner for electrostatic recording has electrical limitations, and there are thousands of different hues. It is impossible for anyone other than an ink manufacturer to produce ink for textile printing in a short period of time. On the other hand, for the ink of the ink layer of the recording medium, the dye can be easily prepared on-site at a textile printing factory and applied to a light-transmitting support.

However, for standard colors, electrostatic recording toner is much cheaper, so it is not economical to print using the discharge destruction transfer method, and the electrostatic recording method alone cannot adequately express the hue of the original image. However, by using both methods in combination, a textile printing transfer body can be manufactured at a relatively low cost and in a short time, which is highly effective.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a discharge destruction type transfer recording apparatus using electrostatic recording paper on which a color image is formed as a recording medium according to an embodiment of the present invention.

FIG. 2 is a control block diagram of the embodiment of FIG. 1;

FIG. 3 is a diagram showing the relative positional relationship between electrostatic recording paper and a recording medium during conveyance.

[Explanation of symbols]

1 Electrostatic recording paper 2 Recording medium for recording discharge breakdown 3 Registration mark reader 4 Discharge breakdown recording head 5, 7 Pressure contact roller 6 Lamp house 8a, 8a', 8b, 8b' Paper feed roller 9
Drive motor 10 Pulse generator 11, 12, 14, 14' counter 13 Arithmetic unit 15 Control device 16 Image data storage device 21 Registration mark

Claims (1)

[Claims] [Claim 1] The transfer paper for textile printing is based on electrostatic recording paper, and images of standard colors are formed by an electrostatic recording method, and images of hues other than the above standard are formed by an electric discharge breakdown transfer method. Characteristic method for manufacturing transfer paper for textile printing.