JPH0350515Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a diazo copying machine that eliminates the bad odor of exhaust gas from the outlet of an exhaust passage.

[Conventional technology, problems]

Diazo copying machines are blown inside to prevent overheating caused by the light source, but this exhaust gas contains harmful gases such as ammonia generated by reactions associated with copying and used for copying. Exhaust gases are currently discharged outside through pipes, as this poses a health hazard to users.

[Means for solving problems]

In view of the current situation, the present invention has been proposed in which high melting point synthetic fibers, low melting point heat fusible synthetic fibers and adsorbent fibers are mixed at the outlet of the exhaust passage, and the low melting point heat fusible synthetic fibers are fused together. Its feature is that it is equipped with a propeller-type rotating filter made of non-woven fabric.

[Effect]

Since a propeller-type rotary filter made of adsorbent fiber nonwoven fabric is installed at the exit of the exhaust passage of the diazo copying machine of the present invention, harmful gases are sufficiently removed by adsorption, and the exhaust gas is discharged outside. No equipment is required, there is little pressure loss due to filters, less pressure is required for exhaust, and the cost is low.

〔Example〕

Hereinafter, the present invention will be explained in detail according to the illustrated embodiments.

In FIG. 1, reference numeral 1 denotes a diazo type copying machine consisting of a printing section 2 and a developing section 3. Harmful gases generated from the developing section 3 of the copying machine 1 are exhausted by a blower 4. As the developing section 3, for example, heating droplets of ammonia water to generate ammonia gas,
Examples include those that utilize this for development, but the invention is not limited to this, and various other types can be used.
5 is the outlet of the exhaust passage, and the outlet 5 is equipped with a propeller type rotary filter 6 as shown in FIG.
is arranged so that it can rotate. The propeller-type rotary filter 6 is, for example, as shown in FIG. is a mixture of high melting point synthetic fibers, low melting point heat fusion synthetic fibers, and absorbent fibers, and is formed by low melting point heat fusion, etc.
Adsorbent fibers include activated carbon fibers and ion exchange fibers.

Here, the activated carbon fiber is made by polymerizing coal tar to form an isotropic spinning pitch, which is melt-spun to form a pitch thread, then treated at high temperature to make it infusible, and activated in an oxidizing gas. Activated carbon fibers may be long fibers or short fibers, for example, in the case of long fibers,
A large number of extruded fibers are taken up by an air stream and stacked randomly on a conveyor belt to form a nonwoven fabric, and in the case of short fibers, the extruded fibers are cut to an appropriate length and shortened. By making it into fibers, a nonwoven fabric is formed.

Moreover, ion exchange fibers are fibers containing ion exchange groups.

Various synthetic fibers such as polyester, polypropylene, and polyamide are used as high-melting synthetic fibers to be mixed with activated carbon fibers, ion-exchangeable fibers, etc., and low-melting synthetic fibers have a melting point of at least 40% higher than that of high-melting synthetic fibers. It is desirable to use one having a melting point of 0.degree. C. or less. It is desirable that the high melting point synthetic fiber and the low melting point heat-fusible synthetic fiber be of the same type, but a combination of different synthetic fibers may be used as long as they have compatibility. The high melting point synthetic fiber and the low melting point heat-fusible synthetic fiber may be integrally bonded, especially composite fibers that have a high melting point synthetic polymer as a core component and a low melting point synthetic polymer as a sheath component. is desirable. High melting point synthetic fibers and low melting point heat-sealable synthetic fibers are cut into 50 to 150 mm lengths, preferably crimped, and carded to facilitate fusing with adsorbent fibers such as activated carbon fibers and ion exchange fibers. The fibers are opened and mixed together with adsorbent fibers to form a web, and heated to a temperature between the melting points of high-melting point synthetic fibers and low-melting point heat-fusible synthetic fibers by passing them through a hot air stove, etc. A heat-fusible synthetic fiber with a low melting point is fused to the contact point with an adsorbent fiber such as an activated carbon fiber or an ion-exchange fiber. As a result, nonwoven fabrics such as activated carbon fibers and adsorbent fibers such as ion-exchange fibers having excellent strength, sublime properties, and elastic recovery properties can be obtained.

Furthermore, it is also possible to incorporate various materials other than those mentioned above. For example, if ultra-fine copper fibers of about 20 to 40 μΦ are mixed, the sterilizing property and antistatic effect are improved.

Sheet blade piece 7 of propeller type rotating filter
The absorbent fiber nonwoven fabric may be composed only of an absorbent fiber nonwoven fabric, or the absorbent fiber nonwoven fabric may be laminated on a permeable base material such as a net or nonwoven fabric, or a nonpermeable base material such as a plastic molded article. A propeller type filter is driven by the flow of exhaust gas,
It may be done by a motor. Furthermore, although one propeller-type rotary filter may be used, it is desirable to use a plurality of propeller-type rotary filters.

[Effect of idea]

As is clear from the above explanation, according to the present invention, harmful gases generated by copying machines can be sufficiently removed by adsorption, so there is no need for operations or equipment to discharge exhaust gases outdoors, and there is no need for a filter to Since pressure loss is small and discharge energy can be reduced, it has excellent practical effects such as low cost.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a schematic sectional view thereof, FIG. 2 is an enlarged sectional view of the main part thereof,
FIG. 3 is an enlarged front view of the propeller type rotary filter.

Claims (1)

[Scope of utility model registration request] At the exit of the exhaust passage, high melting point synthetic fibers, low melting point heat-fusible synthetic fibers, and adsorbent fibers are mixed,
1. A diazo copying machine characterized by being equipped with a propeller-type rotary filter having a nonwoven fabric formed by fusing low-melting-point heat-fusible synthetic fibers.