JPS63208029A - Recorder - Google Patents

Abstract

PURPOSE:To obtain color prints coinciding with originals on both faces of a recording medium by subjecting image sheets to exposing, then breaking down capsules to bring color forming agents and developers into reaction. CONSTITUTION:Color forming precursors showing cyan, magenta and yellow colors and sensitive compsns. which are changed in viscosity, etc., to immobilize said precursors by sensing light of different wavelengths at each of the color forming precursors of the respective colors are enclosed by thin films to form the microcapsules. The two image sheets 1a, 1b are prepd. by coating such microcapsules uniformly on the surfaces. A developing sheet 2 is formed by coating the developers which form colors by reacting with the color forming precursors on both surfaces thereof. Such developing sheet is held in place between the two image sheets 1a, 1b to form the developing medium. The viscosity of the sensitive compsn. in the capsules changes when an original image is projected and exposed on one image recording surface of the sheets 1a, 1b. A difference arises in the quantity between the capsules subjected to the light sensing and the color forming precursors flowing out of the unsensed capsules when the microcapsules are broken down in this state. The colors correlating with the exposing wavelengths are thereby produced and the color prints coinciding with the originals are formed.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention provides a color recording device coated with microcapsules containing a color former and a sensitive substance that immobilizes the color former by reacting with light of a specific wavelength. The present invention relates to a color recording device that uses a prepared sheet as an image forming sheet.

[Summary of the invention]

In the present invention, a developer is coated on both sides between two image sheets coated with microcapsules containing color formers of different colors and a sensitive substance that immobilizes the color formers by being sensitive to light of a specific wavelength. It has a structure in which it is possible to select the image sheet to be exposed by holding a developing sheet and changing the optical path of the projection light of the irradiated original image by changing the inclination of a reflecting mirror provided in the optical path. After exposing one or both image sheets to light, the capsules are destroyed and the coloring agent and developer are reacted to produce a color print that matches the original on one or both sides of the developing sheet.

[Conventional technology]

2. Description of the Related Art Copying machines using electrophotography have been widely known as devices for making copies of originals.

[Problem that the invention seeks to solve]

However, in the conventional color copying machine, it is necessary to supply toner of each color in order to reproduce colors by overlapping cyan, magenta, and yellow toners, resulting in the problem of increased size and complexity of the apparatus. In addition, in order to obtain a double-sided copy, a process of printing on one side and then flipping the copy paper to print on the other side is necessary, which poses a problem in terms of printing speed.

[Means for solving problems]

In order to solve these problems, the present invention has developed a coloring precursor that produces cyan, magenta, and yellow, and a coloring precursor that changes its viscosity by being sensitive to light of a different wavelength for each color. Two image sheets whose surfaces are uniformly coated with microcapsules surrounded by a thin film of a sensitive composition that immobilizes the image, and a developing sheet whose both sides are coated with a developer that develops color by reacting with a color-forming precursor are described in 11i. A structure that is sandwiched between two image sheets and used as a developing medium, and has an optical means for projecting and exposing the image recording surface of the developing medium and an optical means for projecting and exposing the other image recording surface. did.

[Effect]

When an original image illuminated by a light source is projected and exposed onto one image recording surface of the image sheet described above, the viscosity of the sensitive composition in the capsule changes.

When the microcapsules are destroyed by applying pressure while the photosensitive image sheet and the developing sheet are layered, a difference occurs in the amount of coloring precursor flowing out from the photosensitive and unsensitized capsules, and the development Colors that correlate with the exposure wavelength appear on the sheet, resulting in a color print that matches the original.

Moreover, double-sided printing can be performed by simultaneously changing the optical path of the projection light by rotating the reflecting mirror and exposing the image recording surface of the other image sheet.

〔Example〕

The details of the present invention will be explained below based on illustrated embodiments. FIG. 1 is a cross-sectional view showing an embodiment of the present invention, and symbols 1a and lb in the figure are cyan and magenta on the surface of the sheet 1-H, as shown in the cross-sectional view of the image sheet in FIG. , and a coloring precursor M al , a that develops a yellow color.
2+ a 3 and a different wavelength λ1 for each color precursor. λ2. A sensitive composition part that changes viscosity etc. in response to light of λ and immobilizes the coloring precursor, , b, , b,
It is an image sheet formed by uniformly coating microcapsules A + , A t , A s surrounded by a thin film C of gelatin or the like. n tip part 20. It is configured to move via the developing device 3 and is wound up by a winding roll 13 .

2 is a developing sheet formed by coating both sides of sheet E with a developer, as shown in the cross-sectional view of the developing sheet in FIG. It is configured to move with.

At least λ8. A light source 6 containing light with a wavelength of λ3
Field 1f5 illuminated by (e.g. halogen lamp)
By arranging the projection lens 8 and the reflecting mirrors 9 and 10, the structure is such that the image can be projected and exposed onto the image forming area of the image seam a.

7 indicates the optical path of the projection light.

Further, the reflecting mirror 9 is driven by a drive 8! (not shown). By rotating the image sheet 1b by a mechanism and changing its inclination, the next original image can be exposed onto the other image sheet 1b. The light source and the reflecting mirror form a projection exposure means.

Reference numeral 3 denotes the above-mentioned developing device, which is composed of a calender roll having two upper and lower rollers, and is used to develop the image sheet la.

Developing sheet 22 is pressed with the image sheets overlapped to form microcapsules A+ and A2. It is configured to destroy A y.

Note that the reference numeral 4 in the figure indicates a roll heater that heats the developing sheet 2 discharged from the developing device 3 to assist in color development.

In this embodiment, the original image illuminated by the light source 6 is projected and exposed onto the image forming area of the image seam a by the projection lens 8 and the reflecting mirror 9.10, and the image seam Ha, l
The sheet B of b is made of a light-transmitting member (for example, a transparent film), and the microcapsules are exposed to the light that passes through the sheet B.

On the image sheet la, light of a specific wavelength λ1 . λ2. λ, a large number of microcapsules A
1. A2. As A3 becomes sensitive, the hardness of the sensitive composition bl+bLb changes depending on the amount of light, and a latent image is formed.

When printing on both sides, by changing the inclination of the reflecting mirror 9, the next original is projected onto the image sheet lb and exposed to form a latent image.

In the case of single-sided printing, λ3. λ2. By uniformly exposing the image sheet Hb with light a14 (for example, a halogen lamp) containing light with a wavelength of
+ , A 2+ Immobilizes A 3.

In this way, the image No. 1 of the area where the latent image was formed
a and lb are moved to the developing device 3 together with the developing sheet 2. The developing device 3 is connected to the transported image sheet) 1a.
, development sheet image sheet) 1b are stacked and pressure is applied to form microcapsules A I A Z
, destroy A3.

At this time, each microcapsule A+ on the image sheet.

Photosensitive composition encapsulated in ALA3, b2゜b
, are cured in accordance with the exposure amount, so the microcapsules A1. Het, A, the amount of coloring precursor a, a, a, a, flowing out from the inside is different. As a result, from the portions of the image sheets la and lb that have been rolled down in the developing device 3, coloring precursors al+ ag+ a3 corresponding to the exposure amount ooze out onto the developer layer coated on the developing sheet 2. , reacts with the developer to produce cyan and magenta, respectively.

It has a yellow color. Needless to say, one pixel is coated with a large number of microcapsules that display the three primary colors, so one pixel is expressed as a collection of minute pigments of the three primary colors, and the pigments are combined with each primary color. will be revealed.

The developing sheet 2 that has come out of the developing device 3 is heated by the roll heat 4, and the coloring precursor aI seeps out onto the developer layer.
+ The reaction between aR-a3 and the developer rapidly progresses, and a color pattern matching the original is printed.

In the above explanation, a structure in which a developing sheet is sandwiched between two image sheets has been described, but an image sheet coated with microcapsules on both sides may also be sandwiched between two developing sheets. It is possible.

〔Effect of the invention〕

As described above, according to the present invention, compared to the conventional system, the device can be made smaller and simpler, and
1. A device capable of high-speed color double-sided printing can be realized.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the recording apparatus of the present invention, FIG. 2 is a sectional view of an image sheet, and FIG. 3 is a sectional view of a developing sheet. La, lb...Image sheet 2...Developing sheet 3...Developing device 5...Original 6...Light source 9.10...Reflector and above Applicant Seiko Electronic Industries Co., Ltd.

Claims (1)

[Scope of Claims] Two image sheets coated with microcapsules encapsulating color formers of different colors and a sensitive substance that immobilizes the color formers in response to light of a specific wavelength; and color development of the image sheets. a developer sheet coated on both sides with a developer that reacts with a developer to cause a coloring reaction, and sandwiched between the two image sheets with their coated surfaces overlapping; and the image sheet and the developer sheet. A recording device comprising: means for conveying a document image; means for projecting and exposing a document image onto the two image sheets; and means for destroying microcapsules on the image sheets downstream of the projection exposure means.