CN1220419A

CN1220419A - Carrier recovery apparatus of liquid electrophotographic printer

Info

Publication number: CN1220419A
Application number: CN98109823A
Authority: CN
Inventors: 申圣秀; 白云浩
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 1997-12-13
Filing date: 1998-06-11
Publication date: 1999-06-23
Anticipated expiration: 2018-06-11
Also published as: KR100261095B1; JP2892643B1; KR19990049599A; CN1109939C; JPH11184344A

Abstract

A carrier recovery apparatus of a liquid electrophotographic printer includes a drying roller rotating in contact with a photoreceptor belt, for absorbing a liquid carrier from the photoreceptor belt, a heating roller for heating the drying roller, in contact therewith, and evaporating the absorbed liquid carrier, a manifold surrounding the drying roller and the heating roller, for accommodating the evaporated gas carrier, a sealing blade disposed in a gap between the drying roller and the manifold, a condenser for receiving the gas carrier from the manifold and condensing the same, a supply line for supplying the gas carrier in the manifold to the condenser, and a return line for supplying again residual gas carrier which is not condensed in the condenser to the manifold, wherein the gas carrier is condensed while circulating in a closed loop formed by the manifold, the supply line, the condenser and the return line.

Description

The carrier recovering apparatus of liquid electrophotographic printer

The present invention relates to a kind of liquid electrophotographic printer, or rather, relate to a kind of equipment that is used for recording last time body from the sensitization band.

Can be according to the developing method that adopts being divided into dry-printed machine that uses powder toner and the wet type printer that uses developer solution such as laser printer or the such electrographic printer of duplicating machine, the developer solution that uses in the wet type printer is with toner and can mixes from the liquid-carriers such as NORPAN that Exxon has bought.In two kinds of electrographic printers, by applying toner the electrostatic latent image that is formed on the sensitization band is developed, print off image by offset medium then.

Existing liquid electrophotographic printer shown in Fig. 1 is included in to be printed the print unit 10 of predetermined image and is used for removing the carrier recovering apparatus 20 of liquid-carrier to realize reclaiming from sensitization band 14 on the printer paper of conveying.

Print unit 10 comprises by a plurality of

guide rollers

11,12 and the annular sensitization band 14 of 13 supports, on sensitization band 14, form

laser scan unit

18a, 18b, 18c and the 18d of electrostatic latent image, make developing apparatus 15a, 15b, 15c and the 15d of developing electrostatic latent image and the image that develops is transferred to transfer roll 16 on the printer paper 1 by applying the toner that mixes with liquid-carrier.Reference number 17 expressions are charged to sensitization band 14 and are made it to reach the charging station of predetermined level.

2 structures of explaining carrier recovering apparatus 20 in more detail below with reference to accompanying drawings.With reference to Fig. 2, in recycling cavity 21, be provided with dryer roll 22 and warm-up mill 23, dryer roll absorbs liquid-carrier from sensitization band 14 contacting rotation with sensitization band 14 when, and warm-up mill contacts with dryer roll and heat drying roller 22 and the carrier for evaporating that makes absorption.

The vaporized gas carrier is contained in the recycling cavity 21.Owing on the outside surface of recycling cavity 21, be formed with a plurality of heat exchanging fin 21a, on the inside surface that adds recycling cavity 21 so can carrier gas be cooled off by heat interchange.The carrier of collecting cooling from the inside surface of recycling cavity 21 is introduced into cartridge 26 by first reclaim line 25 then.

In addition, by driving blowing fan 29 uncooled carrier gas in the recycling cavity 21 is sent into refrigeratory 28 along supply lines 27.Because liquid cooling carrier 28a is housed in refrigeratory 28, so by carrying out the carrier gas liquefaction that heat interchange just can make introducing with coolant carrier 28a.Along with the cooling of carrier gas, the surface elevation of coolant carrier 28a rises.Then by second reclaim line 31 with a part of carrier recovery in cartridge 26, the carrier gas that does not have to cool off in refrigeratory 28 with 30 pairs of filtrators filters and it is discharged to the outside with air.The discharge line that reference number 19 expressions link to each other with the outside by filtrator 30, it is used to print unit 10

dehumidifying.Label

32 and 33 expression vent line and moisture reservoirs, its be respectively applied for eject from the moisture that is stored in the liquid-carrier 28a in the refrigeratory 28 and and this moisture exist in the moisture reservoir.

In existing carrier recovering apparatus 20 and since in refrigeratory 28 uncooled carrier gas by filtrator except, so unfiltered carrier gas is flowed out if the filtration capacity of filtrator 30 descends.Yet,, flow out so should prevent carrier because the NORPAR that uses as carrier is dangerous contaminated materials.

In order to address the above problem, the purpose of this invention is to provide a kind of carrier recovering apparatus that in having the liquid electrophotographic printer that improves structure, uses, utilize this reclaimer can suppress the carrier outflow.

So, a kind of carrier recovering apparatus of liquid electrophotographic printer is provided in order to achieve the above object, it comprises touching with photosensitive belt and rotates the dryer roll be used to absorb the residual liquid carrier of staying on the sensitization band, be used to heat the dryer roll that is in contact with it and make the warm-up mill of the liquid-carrier evaporation of absorption, encase dryer roll and warm-up mill and be used to hold the recycling cavity of boil-off gas carrier, reception is from the carrier gas of recycling cavity and make the refrigeratory of its cooling, carrier gas in the recycling cavity is delivered to the supply lines of refrigeratory, it is characterized in that this equipment comprises the return line of the residual gas carrier that does not cool off being delivered to once more recycling cavity in refrigeratory, described carrier gas is along by recycling cavity, supply lines, cooled off in the time of closed loop cycle that refrigeratory and return line form.

And, an end of supply lines is connected on the recycling cavity a side near warm-up mill, thereby the carrier gas of delivering to recycling cavity once more by return line is discharged by supply lines behind warm-up mill.

The detailed description of preferred embodiment being carried out by the reference accompanying drawing will make above-mentioned purpose of the present invention and advantage become more obvious, wherein:

Fig. 1 is the synoptic diagram of common liquid electrophotographic printer;

Fig. 2 is the synoptic diagram of existing carrier recovering apparatus;

Fig. 3 is the synoptic diagram of carrier recovering apparatus of the present invention.

The carrier recovering apparatus of the liquid electrophotographic printer of the present invention shown in Fig. 3 comprises the dryer roll 220 that is used for absorbing from sensitization band 140 liquid-carrier, contact with dryer roll 220 and to its heating and make the warm-up mill 230 of the liquid-carrier evaporation of absorption, dryer roll and warm-up mill all are installed in rotation in the recycling cavity 210.

Owing on the outside surface of recycling cavity 210, form a plurality of heat exchanging fins 211, so some vaporized gas carriers are cooled off on the inside surface of recycling cavity 210 by the heat interchange of carrying out with the surrounding air of passing a plurality of heat exchanging fins 211.By first recovery tube 250 coolant carrier of collecting from recycling cavity 210 inside surfaces is guided to the cartridge 260 then.

By supply lines 270 recycling cavity 210 is communicated with refrigeratory 280.To deliver to refrigeratory 280 from the carrier of recycling cavity 210 evaporations at driving blowing fan 290.

According to the present invention, refrigeratory 280 and recycling cavity 210 are connected with each other by return line 271.At driving return fan 272 return lines 271 a small amount of carrier gases that do not cool off are delivered to recycling cavity 210 once again in refrigeratory 280.Like this, recycling cavity 210 and refrigeratory 280 form the ring of a sealing, and carrier gas can circulate by way of supply lines 270 and return line 271 along closed-loop.At this, as shown in Figure 3, return line 271 links to each other with recycling cavity 210 respectively after being divided into two-way.Preferably an end of supply lines 270 is received on the recycling cavity 210 near on the position of warm-up mill 230, so just can be made the carrier gas of sending into once again in the recycling cavity 210 by supply lines 270 discharges by means of warm-up mill 230.

If the surface elevation of the cooling liquid carrier in refrigeratory 280 raises, then carrier will move towards cartridge 260 by second recovery tube 310.The drain line that label 190 expressions link to each other with filtrator 300, it is used to get rid of the moisture on the print unit 100.Label 320 and 330 is represented drain line and moisture reservoir respectively, and drain line is used for discharging the moisture that is produced by the liquid-carrier in refrigeratory 280 coolings, and reservoir is used to store these moistures.

In the carrier recovering apparatus of the invention described above, absorb from sensitization band 140 and to exist the recycling cavity 210 after liquid-carrier on the dryer roll 220 evaporates under the effect of warm-up mill 230.

And, can make the vaporized gas carrier shift to refrigeratory 280 and can make most of carrier cooling and liquefaction by driving blowing fan 290 by carrying out heat interchange with liquid-carrier 281 along supply lines 270.A spot of uncolled carrier gas is got back to recycling cavity 210 along return line 271.

Therefore, carrier gas continuous round-robin between recycling cavity 210 and refrigeratory 280 obtains cooling simultaneously, and is recovered in the cartridge 260.The moisture that comprises in the liquid-carrier is discharged in the moisture reservoir 330.

As mentioned above, the structure of the carrier recovering apparatus of liquid electrophotographic printer of the present invention is that the evaporation and the recycling cavity of coolant carrier and refrigeratory respectively are connected to each other forming closed-loop, thus the recovery of raising carrier.

Claims

1. the carrier recovering apparatus of a liquid electrophotographic printer, it comprises touching with photosensitive belt and rotates and absorb the dryer roll of staying the residual liquid carrier on the sensitization band, be used to heat the dryer roll that is in contact with it and make the warm-up mill of the liquid-carrier evaporation of absorption, encase dryer roll and warm-up mill and be used to hold the recycling cavity of boil-off gas carrier, reception is from the carrier gas of recycling cavity and make the refrigeratory of its cooling, carrier gas in the recycling cavity is delivered to the supply lines of refrigeratory, it is characterized in that this equipment comprises the return line of the residual gas carrier that does not cool off being delivered to once more recycling cavity in refrigeratory, described carrier gas is along by recycling cavity, supply lines, refrigeratory and return line are cooled off when forming closed loop cycle.

2. carrier recovering apparatus according to claim 1 wherein is connected on the recycling cavity a side near warm-up mill to an end of supply lines, thereby the carrier gas of delivering to recycling cavity once more by return line is discharged by supply lines behind warm-up mill.