JPH0213950A - Color recorder - Google Patents

Abstract

PURPOSE:To eliminate an unstable image on a developing sheet and to improve image quality by preventing a capsule from rupturing by means of making previously an image forming sheet in a pressure fluctuating region at the time of opening and closing a developing means, a pressing roller, react with the aid of an electron beam or an ion beam before developing. CONSTITUTION:A corona electrostatic charger 5 moves together with an optical movable carriage and emits an electron beam on the specific region of the image forming sheet 8, i.e., regions A and A' which can not evade the pressure- fluctuating of the pressing roller 6 at the time of opening and closing the pressing roller 6 before and after an original 2 is transferred onto the said region. The emitted electron beam reacts with the coloring precursor of the regions A and A' on the image forming sheet 8 and hardens a microcapsule. The corona electrostatic charger 5 can also emit an ion beam. Thus, a color image which is excellent in the reproducibility of color and in gradation can be recorded.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention involves irradiating visible light of a specific wavelength onto microcapsules coated on an image forming sheet through an original, and using a developing means together with a developing sheet to develop a color image. The present invention relates to a color recording device that colors images.

[Summary of the invention]

The present invention provides an image-forming sheet coated with microcapsules encapsulating color-forming precursors of different colors and a sensitive material that immobilizes the color-forming precursors in response to beams of specific wavelengths. In a color recording device in which color is developed by exposing the image forming sheet through an original and then applying pressure to the image forming sheet and the developing sheet, which are developing means, when the developing sheet is paper. A pressure roller that can be opened and closed is used for the pressure application, and when the pressure roller is opened and closed, pressure fluctuations occur and uneven development occurs.

Before development, the microcapsules on the image forming sheet are immobilized using a specific wavelength beam generator for framing the uneven development area, and a framed image without any color development is recorded to prevent deterioration in image quality. be.

[Conventional technology]

In recent years, color image recording devices have begun to be developed, and there are many methods such as electrophotographic technology and thermal transfer technology. Among these, methods that employ microcapsule technology can record color images with excellent color reproducibility and gradation.

Further, it has been revealed in Japanese Patent Application Laid-Open No. 58-88739 that a recording device employing microcapsule technology is structurally simple and has advantages over other systems in terms of maintenance and operation.

[Problem to be solved by the invention]

However, the above microcapsule technology requires the use of a pressure roller as a developing means, and especially in the case of a development sheet or cut paper, the pressure roller must be opened and closed at the start and end of pressure. .

Therefore, when the pressure roller is opened and closed, fluctuations in the pressure of the pressure roller cannot be avoided, and density unevenness occurs in the formed color image, resulting in a problem of deterioration of image quality.

[Means to solve the problem]

The present invention provides an image forming sheet coated with microcapsules enclosing color precursors of different colors and a sensitive substance that immobilizes the color precursors in response to a specific wavelength beam, and a developing sheet for developing an image. a developing means, an exposing means for irradiating the image forming sheet with visible light through the original, a fixing means for stabilizing the developed image on the developing sheet, and a specifying device for framing the image on the developing sheet. The system is equipped with a wavelength beam generator. The above specific wavelength beam generator for framing can be realized by generating white light, but the sensitivity of the coloring precursor differs depending on each wavelength and it is impossible to select an appropriate white light. The device was constructed with a corona charger that generates an electron beam or ion beam, which immobilizes all the coloring precursors of different colors, regardless of their sensitivity.

[Effect]

According to the above configuration, before development, the image forming sheet in the area where the pressure fluctuates when the pressure roller, which is the developing means, is opened and closed is sensitized with an electron beam or an ion beam by operating the corona charger, and the capsule is charged. By preventing rupture, the transfer of the image onto the developer sheet eliminates unstable images and improves image quality.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to Examples.

FIG. 1 is a schematic explanatory diagram of an embodiment of the present invention. 1st
In the figure, a document 2 is placed on a transparent glass document table (not shown) with its image surface facing the SELFOC lens 3, and becomes a document for color recording. The SELFOC lens 3, correction filter 4, white line light source 1, and corona charger are fixed to an optical moving table (not shown), and when recording in color, the white line light source 1 is turned on and irradiates the document 2. Then, image-dependent diffused light is emitted from the original 2, and the light selected by the SELFOC lens 3 and the correction filter 4 exposes a color image on the image forming sheet 8. Further, the optical movable table moves so as to fully expose the color image of the original 2 onto the image forming sheet 8.

The corona charger 5 moves together with the optical movable table, and charges specific areas of the image forming sheet 8, that is, A and A in FIG.
As shown in the area '', an electron beam is emitted before and after the original is transferred. The emitted electron beam reacts with the coloring precursor in areas A and A' on the image forming sheet 8, and hardens the microcapsules. Although the corona charger 5 can also emit an ion beam, the present invention will be explained using an electron beam.

FIG. 2 shows a state in which the optical movable table is moved and a color image is exposed on area B of the image forming sheet 8.
Areas A and A' in the figure indicate the pressure roller 6 which is the developing means.
The opening/closing means (not shown) operates and the pressure fluctuates, and in region B, the pressure roller 6 again operates stably.

When the color image of the original document 2 is transferred to the image forming sheet, the winding roller rotates and the developing sheet 7 is transferred.
The pressure roller 6 is controlled so that the top of the area A of the image forming sheet 8 coincides with the top of the area A of the image forming sheet 8, the pressure roller 6 is closed, and development is started. When the developing operation begins in area A', the pressure roller 6 is operated to open.

FIG. 3 shows the state of the developing sheet 7 after development, and shows the state of the developing sheet 7 in area A.
In areas a and A'a, no image is transferred, and in area Bb, a color image is recorded. After development, the developer sheet 7 is
A stable color image is recorded through the fixing means 10.

Figure 4 shows a corona charger 5.5a installed separately from the exposure means.
This is an example 6 in which areas A and A' are created by fixing the individual parts and adjusting the exposure for framing the image.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of the present invention, Fig. 2 is an explanatory diagram of an image forming sheet after exposure, Fig. 3 is an explanatory diagram of a developing sheet after development, and Fig. 4 is a schematic explanatory diagram of another embodiment. shows. 1... White line light source 2... Original 3... Selfoc lens 4... Correction filter 5... Corona charger 6... Pressure roller 7... Developing sheet 8... Image forming sheet 9... Winding roller 10... Fixing means A, A', B... Area range or more Applicant Seiko Electronics Co., Ltd. Agent Patent attorney Takayuki Hayashi Sukefushi r@'s gland Meditation diagram No. 1 Diagram 2 Explanatory diagram of the drawing sheet of Koman Figure 2 Illustration of the current Itori sheet after the family home Diagram 4

Claims (1)

[Claims] An image-forming sheet coated with microcapsules encapsulating color-forming precursors of different colors and a sensitive substance that immobilizes the color-forming precursors in response to beams of specific wavelengths, that is, visible light, electron beams, and ion beams; a developing sheet for developing, a developing means, an exposing means for irradiating the image forming sheet with visible light through the original, a fixing means for stabilizing the developed image on the developing sheet, and a developing sheet for developing the image on the developing sheet. A color recording device characterized by being equipped with a specific wavelength beam generator for framing an image.