JPS6237230Y2 - - Google Patents

Description

[Detailed Description of the Invention] Background of the Invention (1) Field of the Invention The present invention relates to a dry type diazo copying machine that performs development using ammonia gas, and particularly relates to a structure for deodorizing ammonia gas.

(2) Description of the prior art In conventional dry type diazo copying machines, especially in dry type diazo copying machines that develop using ammonia gas at a relatively low temperature, for example, room temperature, the photosensitive paper after development is copied with ammonia gas attached to it. It is discharged to the receiver. Therefore, there was a problem in that residual ammonia gas adhering to the photosensitive paper gradually dispersed and contaminated the working environment. Prior art techniques for removing this ammonia odor include forcibly exhausting the ammonia gas and neutralizing it with acid. These prior art techniques have complicated structures or may cause secondary pollution such as water pollution due to waste liquid after ammonia gas treatment.

Therefore, an object of the present invention is to provide a dry type diazo copying machine which has a simple structure and can deodorize ammonia gas without causing secondary pollution.

DESCRIPTION OF PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a simplified cross-sectional view of one embodiment of the present invention. A roll of photosensitive paper 3 is mounted inside the body 2 of this dry type diazo copying machine 1. This photosensitive paper 3 is appropriately cut by a known cutting means and guided into a conveyance path 6 along with a document 4 inserted from a document insertion opening 5 as shown by broken lines. The photosensitive paper 3 and the original 4 are conveyed to the printing means 8 while being kept in pressure contact with each other by the conveyor belt 7. This printing means 8 comprises a lamp 10 built into a glass tube 9, and the image of the original 4 is printed onto the photosensitive paper 3 by the light from the lamp 10. After the printing is completed, the original 4 and the photosensitive paper 3 are discharged from the paper discharge port 11.
After printing, the photosensitive paper 3 is guided into a developing chamber 13 by a conveying roller 12. The developing chamber 13 is filled with ammonia gas at room temperature, and when the ammonia gas comes into contact with the photosensitive paper 3, the image printed on the photosensitive paper 3 is developed. Note that the ammonia gas is stored in the ammonia liquid storage container 14.
It is obtained by bubbling air at room temperature into the air. After the development is completed, the photosensitive paper 3 is discharged onto the copy receiver 16 by the conveying roller 15.

FIG. 2 is a sectional view taken along the section line - in FIG. 1. The upper part of the copy receiver 16 forms a photosensitive paper discharge space 17 and is covered with a cover 18 . This cover 18 is attached to a hinge 20 at the upper end of the rear side (right side in FIG. 1) of the fuselage 2 so that it can be opened and closed around the horizontal axis.
is supported by. Therefore, as shown by the imaginary line, the cover 18 can be opened and closed above the body 2. Rear end of cover 18 (right side in Figure 1)
A gas discharge port 21 is formed in the center, and a blower 22 for exhausting gas from the photosensitive paper discharge space 17 is provided at the discharge port 21 . Inside the cover 18, a partition plate 25 is suspended from the cover 18 closer to the discharge port 21 than directly above the copy receiver 16.
This partition plate 25 and the rear side wall 18 of the cover 18
The deodorizing section 23 is filled with a deodorizing agent, such as alumina particles. This deodorizing section 23
The bag may be constructed by filling a filler inside a bag that allows gas flow, and is detachably attached. The partition plate 25 includes both widthwise side walls 18b of the cover 18,
18c, there is a gap 26 for gas to flow.
form.

On the front side of the cover 18 (left side in FIG. 1),
A lid 27 for taking out the photosensitive paper on the copy receiver 16 is provided so as to be openable and closable. Lid 27 is formed from a transparent material and is pivoted to cover 18 by hinge 28 .

When copying with this dry type diazo copying machine 1, the cover 18 is closed as shown by the solid line in FIG. 1, and the power is turned on to start the copying operation and the blower 22 is driven. After copying is completed, the photosensitive paper is discharged onto the copy tray 16, and the ammonia gas adhering to the photosensitive paper is exhausted from the discharge port 21 via the deodorizing section 23 by the blower 22. When the ammonia gas passes through the deodorizing section 23, the ammonia gas is adsorbed by the deodorizing agent and is deodorized, so that the gas discharged from the outlet 21 does not contain ammonia odor. In the deodorizing section 23, gas is sucked from the gaps 26 at both ends in the width direction as shown in FIG.
8, the contact time between the deodorizer and the gas can be relatively long, and as much ammonia gas as possible can be adsorbed. When all the photosensitive paper has been discharged onto the copy receiver 16 and the ammonia gas in the discharge space 17 has been exhausted through the deodorizing section 23, the lid 27 can be opened and the photosensitive paper can be taken out. Note that since the lid 27 is transparent, the copy receiver 16
You can see the photosensitive paper above.

When the size of the photosensitive paper is relatively large and it is difficult to take it out from the lid 27, the cover 18 can be opened entirely as shown by the phantom line in FIG. 1 to take out the photosensitive paper. Furthermore, when the deodorizer adsorption capacity of the deodorizing section 23 decreases, the cover 18 can be opened and a new deodorizer can be installed.

The deodorizing agent may be not only one that adsorbs ammonia gas such as alumina, but also one that reacts with ammonia gas to neutralize it.

As described above, the present invention has a simple configuration in which a cover is provided to cover the copy receiver, and the gas in the photosensitive paper discharge space is exhausted by a blower through the deodorizing section, thereby removing the ammonia gas that adheres to the photosensitive paper and comes out. Also, ammonia gas leaking from the photosensitive paper transport path can be deodorized. Further, since the ammonia gas is deodorized using a deodorizing agent, there is no risk of secondary pollution caused by the treatment liquid after the deodorizing treatment, unlike in the prior art.

[Brief explanation of the drawing]

FIG. 1 is a simplified sectional view of one embodiment of the present invention, and FIG. 2 is a sectional view taken along the section line - in FIG. 1. 1... Dry type diazo copying machine, 2... Aircraft, 3...
Photosensitive paper, 6... Conveyance path, 13... Development chamber, 16
...Copy receiving, 17...Photosensitive paper ejection space, 18...
...Cover, 21...Discharge port, 22...Blower, 2
3... Deodorizing section, 27... Lid.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A dry diazo copying machine that develops printed photosensitive paper by contacting it with ammonia gas, the copy receiver from which the processed photosensitive paper is ejected can be opened and closed. a cover having a cover gas discharge port; a blower provided at the discharge port for exhausting gas from a photosensitive paper discharge space covered by the cover and leaked gas from a photosensitive paper transport path connected to the discharge space; 1. A dry type diazo copying machine comprising: a deodorizing section that is filled with a deodorizing agent to allow gas to flow from the discharge space to the discharge port, and that is detachably mounted within the cover. (2) The dry type diazo copying machine according to claim 1, wherein the cover is provided with a transparent lid that can be opened and closed to take out the photosensitive paper on the copy receiver.