JPH0361941A - image forming device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image forming apparatus that exposes a light-sensitive pressure-sensitive recording medium, color developer paper, and heat-developable color silver salt photographic paper to light using a cathode ray tube as a light source. .

[Prior Art] Conventionally, image forming apparatuses that form images on so-called special papers such as photosensitive pressure-sensitive recording media and heat-developable color silver halide photographic papers have required a dedicated exposure light source for each paper.

[Problems to be Solved by the Invention] However, when outputting color images, the texture of silver halide photography is often required, but on the other hand, running costs have become expensive.

- Universal light-sensitive pressure-sensitive recording media and color developer paper have relatively low running costs, but are inferior to silver halide photography in terms of texture.

Therefore, if running costs are important, use a photosensitive pressure-sensitive recording medium and color developing paper; if texture is important, use
Although it is necessary to use a silver halide photographic image forming apparatus, there is a drawback that each requires a dedicated exposure light source.

The present invention was made in order to solve the above-mentioned problems, and an object of the present invention is to provide an image forming apparatus capable of forming images on both a photosensitive pressure sensitive recording medium and a heat-developable silver salt photographic paper. There is.

[Means for Solving the Problems] In order to achieve this object, the image forming apparatus of the present invention includes an optical device capable of switching exposure system paths.

[Function] The image forming apparatus of the present invention having the above-mentioned configuration can perform exposure to a photosensitive pressure-sensitive recording medium and exposure to a heat-developable silver salt photographic paper using a single cathode ray tube.

[Example] Hereinafter, an example embodying the present invention will be described with reference to the drawings.

First, the overall configuration of an image forming apparatus according to the present invention will be described with reference to FIG. The photosensitive pressure sensitive microcapsule paper 2 housed in the microcapsule paper cartridge 3 is
Guided by microcapsule paper conveyance rollers 4a and 4b,
The microcapsule paper passes through a pressure development unit 6 and is wound onto a microcapsule paper take-up roller 8 . Further, the color developing sheet 17 is
They are stored in a developer sheet cassette 16, taken out one by one by a developer sheet feed roller 15, guided to a developer sheet feed guide 9, transferred to a pressure developing unit 6, and a discharge guide 10.
The sheet is driven by the thermal fixing section conveyor belt 12, passes through the thermal fixing unit 11, and is then discharged to a paper discharge tray 13 as an output sheet 14. On the other hand, the silver halide sheets 20 are stored in a silver halide sheet cassette 18, taken out one by one by a silver halide sheet feed roller 19, guided to silver halide sheet transport rollers 21a and 21b, and guided to a silver halide sheet guide 22. After passing through the pressure developing unit 6, the color developing sheet 1
Similarly to 7, the output sheet 14 is discharged onto the paper discharge tray 13. Further, there is a cathode ray tube 25 below the mounting body 1, and the raster image thereof is transmitted by the lens 23 to the exposure surface 5a,
5b.

At that time, an optical color separation filter 24a is placed in the optical path.

It is configured so that b and c can be selectively inserted.

Further, the exposure system path is switched by driving the mirror 26 by the motor 27, and switching between the exposure surface 5a of the photosensitive pressure sensitive paper and the exposure surface 5a of the silver salt sheet.
b.

Next, the configuration of the video signal processing section of the image forming apparatus according to the present invention will be explained with reference to FIG. A video signal output from an external host computer or the like is input to an input connector 41, then to a data selector 43, and one of a red component, a green component, and a blue component is selected and output. The selected signal is added to the blank adding circuit 46 so that the cathode ray tube 25 does not emit light during the retrace period, and is clamped by a clamp circuit 47 for DC level reproduction. is applied to the cathode of

On the other hand, the green component of the video signal from the host computer is input to four synchronization signal separation circuits, where the synchronization signal component is separated. The separated synchronization signal is further divided into a vertical synchronization signal and a horizontal synchronization signal by a vertical and horizontal synchronization separation circuit 50.

The horizontal synchronization signal is input to the horizontal oscillation circuit 51, and the horizontal oscillation circuit 51 connects the polarization yoke 5 via the horizontal drive circuit 53.
The current flowing through the cathode ray tube 25 is controlled to cause horizontal deflection in raster scanning of the cathode ray tube 25. Further, the horizontal oscillation circuit 51 generates voltages for each part of the cathode ray tube 25 via a high voltage generation circuit 52. Further, the vertical synchronization signal is applied to a vertical oscillation circuit 54, and the vertical oscillation circuit 54 similarly controls the vertical deflection of raster scanning via a vertical drive circuit 55.

Next, the operation of the image forming apparatus of this embodiment will be explained with reference to FIGS. 1 to 5. In FIG. 3, the display panel 6
When the system controller 64 detects that the start switch 62 in 1 is pressed, the system controller 64 first checks the state of the paper changeover switch 63. When the paper changeover switch 63 is in a state where the microcapsule sheet is selected, the system controller 64 issues commands to the CRT control circuit 65 and mechanism control circuit 66 to perform the following operations.

1) Make the mechanism control circuit 66 select the optical color separation filter 24a (red).

2) Issue a command to the CRT control circuit and select the data selector 43.
selects the red component of the video signal and turns on the cathode ray tube 25.
let

At this time, the voltage applied to the cathode of the cathode ray tube 25 is
This will be explained according to the diagram. First, a blank signal is added to the input signal (a in the figure) selected by the data selector 43 (b in the figure). This blank signal is used to prevent the cathode ray tube 25 from emitting light during the retrace period in raster scanning.

Next, in order to reproduce the DC level, clamping is performed (C in the same figure), and a waveform as shown in D in the same figure is applied to the cathode by the drive circuit 48. In D in the same figure, the black level of the video signal is Clamping is performed to match the cutoff voltage of the cathode ray tube, but if so-called sub-exposure is required, it is also possible to set the black level below the cutoff voltage. Further, the vertical drive circuit 55 is configured as shown in FIG. 4, for example, and the vertical oscillation signal voltage (FIG. 5b) outputted from the vertical oscillation circuit 54 in response to the vertical synchronization signal (FIG. 5a).
) (FIG. 5C) can be made to flow through the vertical deflection yoke in response to a command from the system controller 64.

3) The raster image on the cathode ray tube 25 is formed by the lens 23 onto the photosensitive pressure-sensitive microcapsule paper located at the exposure surface 5. Here, photosensitive pressure-sensitive microcapsule paper is, for example, as disclosed in JP-A-58-88739, in which microcapsules containing a photocurable resin, a photopolymerization initiator, and a dye precursor are coated on a base paper. It was constructed as follows.

4) The same thing as above is performed using a combination of the green component of the video signal and a green optical color separation filter, and a combination of the blue component of the video signal and a blue optical color separation filter.

As a result, in the part of the photosensitive pressure-sensitive microcapsule paper 2 corresponding to the exposed surface 5a, the microcapsules in the part irradiated with light are cured, and the microcapsules in the part not irradiated with light remain uncured. By exposure, a color latent image is formed on the surface of the photosensitive and pressure sensitive paper 2.

5) Drive the microcapsule paper winding roller 8 and the microcapsule paper transport rollers 4a and 4b, and when the starting position of the formed latent image reaches a predetermined position in front of the pressure developing rollers 7a and 7b, the color developer sheet is fed. The paper roller 15 is driven to feed out the color developing sheet 17 from the color developing sheet cassette 16, and the fed out color developing sheet 17 is transferred to the pressure developing roller 7.
When the pressure developing roller 7 reaches the predetermined position in front of the rollers a and 7b,
a and 7b are controlled to be in contact with each other.

6) In the state of 5) above, feed the photosensitive pressure-sensitive microcapsule paper 2 and the color developer sheet 17 for one screen.

At this time, the exposed surface of the photosensitive pressure-sensitive microcapsule paper 2 and the color developer coated surface of the color developer sheet 17 pass between the pressure developing rollers 7a and 7b in a state where they face each other.

As a result, the hardened microcapsules are not destroyed,
The uncured microcapsules are destroyed and react with the color developer to form a color image on the color developer sheet 17.

7) Stop the microcapsule paper conveying rollers 4g, 4b and the microcapsule paper take-up roller 8, and widen the interval between the pressure developing rollers 7a, 7b.

8) The color developer sheet 17 that has been sent toward the thermal fixing unit 11 by the sheet discharge guide 10 is conveyed by the thermal fixing section conveyor belt 12 and is discharged to the sheet discharge tray 13 as an output sheet 14.

At this time, the color developing sheet 17 on which the color image has been formed is thermally fixed.

9) Wait until the next start switch is pressed.

This completes one process of color image output using photosensitive pressure-sensitive microcapsule paper.

Next, a process will be shown in which the paper changeover switch 63 is set to the thermal development color silver halide photograph side.

1) Drive the mirror drive motor 27 to rotate the mirror 26. (Situation in FIG. 1) 2) Drive the silver salt sheet feeding roller 19 and the silver salt sheet transport rollers 21a, b, take out only one silver salt sheet 20 from the silver salt sheet cassette 18, and send it to the exposure section 5b.

3) Insert the optical color separation filter 24a (red) into the optical path.

4> Make the data selector A43 select the red component of the video signal and turn on the cathode ray tube 25.

The voltage applied to the cathode of the cathode ray tube 25 at this time will be explained with reference to FIG. First, the input signal selected by the data selector 43 (a in the same figure) is added with a blank (b in the same figure) and clamped (C in the same figure) as in the case of the microcapsule paper described above, and then the drive circuit 48 According to
It is applied to the cathode of the cathode ray tube 25 (d in the figure). still,
In this case, the so-called white peak of the video signal is matched to the cutoff voltage of the cathode ray tube 25, but it can be shifted from this if sub-exposure or the like is required.

5) The raster image on the cathode ray tube 25 is formed by the lens 23 onto the silver halide sheet 20 located at the exposure surface 5b.

Here, the silver salt sheet refers to, for example, 3M's dry silver color
This is a heat-developable non-transfer type color silver salt photographic material such as No. 8254), and in this example, signal processing for negative type color reaction is performed.

6) The same steps as 3) to 5) above are performed using a combination of the green component of the video signal and a green optical color separation filter, and a combination of the blue component of the video signal and a blue optical color separation filter. As a result, colored occult blood is formed on the silver halide sheet 20 in a portion corresponding to the exposed surface 5b.

7) Drive the silver halide sheet conveying rollers 21a and 21b to pass the silver halide sheet 20 and the silver halide sheet along the silver halide sheet guide 22 between the pressure developing rollers 7a and 7b, and further through the sheet discharge guide 10 to the heat fixing unit 11 section. send. At this time, the pressure developing rollers 7a and 7b are kept separated from each other.

8> Drive the heat fixing unit conveyor belt 12 and transfer the silver halide sheet 20
The sheet is conveyed while being thermally developed in a thermal fixing unit 11, and is discharged onto a paper discharge tray 13 as an output sheet 14.

In the manner described above, a color image can be formed on a heat-developed color silver salt photograph.

The present invention is not limited to the embodiments detailed above, and various changes can be made without departing from the spirit thereof. For example, in this embodiment, an example using a non-transfer type silver salt sheet has been described, but it is also possible to use a transfer type silver salt sheet and use the pressure developing rollers 7a and 7b as the transfer rollers.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention, color images can be formed on both sides of photosensitive pressure-sensitive microcapsule paper and heat-developable silver halide photographic paper using one machine. It is possible.

[Brief explanation of drawings]

1 to 5 show embodiments embodying the present invention; FIG. 1 is an overview of the main unit, FIG. 2 is a control block diagram, FIG. 3 is an input control block diagram, and FIG. FIG. 4 is a control system diagram of the deflection system, and FIG. 5 is a signal processing flowchart. In the figure, 2 is a microcapsule paper, 6 is a pressure developing unit, 11 is a heat fixing unit, 14 is an output sheet, 17 is a color developer sheet, 20 is a silver salt sheet, 25 is a cathode ray tube, and 26 is a mirror.

Claims (1)

[Claims] 1. In an image forming apparatus that uses both an image forming means using a light-sensitive pressure-sensitive recording medium and color developer paper and an image forming means using heat-developed color silver salt photography, the light emitted from one cathode ray tube is optically transmitted to each exposure surface. 1. An image forming apparatus characterized in that an image is formed in a fixed manner, and the exposure path is switched by a mirror.