Device and method for the replacement of out-of-date developer

Translation of description of equivalent WO 02067060 A2

description

Apparatus and method for replacing aged developer

The invention relates to an apparatus and a method for replacing at least one component of a flowable medium. Furthermore, the invention relates to the use of such a device in a printer or copier.

Examples of systems in which flowable media are used are electrophotographic or ionographic printers or copiers. The flowable medium used therein is a developer, especially a two-component developer containing a toner and a magnetic carrier, each in particulate form.

In printers or copiers operating on the electrophotographic principle, charge images of characters to be printed, such as texts or drawings, are produced on an intermediate carrier, for example a drum with an electrophotographic layer. The intermediate carrier with the charge images is led to a development station where the charge images are developed and made visible. During development, the toner particles of a two-component developer are transported through the carrier particles in the direction of the intermediatepromoted and electrically attracted by the charge carriers on the intermediate carrier. The carrier particles are returned to the developer station. The developed charge images are transferred to a recording medium, for example a paper web, and fixed on this. The toner material within the two-component developer is consumed in the development process. According to this consumption, fresh toner material is replenished. The returned carrier material is subject to an aging process, whereby the printing or copying quality may suffer. Therefore, it is necessary to gradually renew the substrate as well.

In WO 98/39691, the entire disclosure of which is hereby incorporated by reference, a printing or copying apparatus is described in which a recording medium can be printed monochrome and / or color. In this case, a plurality of developer stations are provided, which are each assigned a color for printing a color. In order to obtain the print quality in such printers or copiers, a replacement must be made at certain time intervals because of the aging of the developer or the aging component contained therein in the form of the carrier. So far, this could for example be such that developer stations are completely emptied and then refilled, which is very time-consuming and is associated with an interruption of the printing or copying operation.

Replacement of aged carrier developer with fresh developer may also be done by supplying developer stations with fresh toner and fresh carriers separated from one another such that there is always a defined amount of print or copy quality toner and carrier in the developer , so that the printing or copying operation does not have to be interrupted.

From US-PS 4,358,196 a device for replacement of aged developer by fresh developer in a development station of an electrophotographic apparatus is known. This known device contains two metering devices, via which one developer is supplied to the developer station and via whose other aged developer is removed from the development station, so that there is always a good print quality of guaranteeing developers in the development station.

When replacing an aged carrier developer, it is important that in a development station there is always a certain volume of developer with a defined toner and carrier concentration, ie, a defined toner to carrier ratio. Over the entire running time of a printing unit, there must always be a total filling quantity of developer in the development station which guarantees the proper functioning. The toner concentration can be regulated in a separate control circuit, so that there is always a print quality ensuring amount of toner in the development station. The regulation can be carried out in such a way that the toner concentration is detected and regulated indirectly either directly by means of a sensor or by detecting the coloring of the print.

Usually, the volume of the supplied two-component developer is known to be the ratio of toner to carrier. However, the ratio of the toner to the carrier in the volume of the discharged developer may differ from the ratio in the supplied developer, because the toner concentration in the developing station may deviate upward or downward from the toner concentration of the supplied developer due to control deviation. However, since both volumes are the same, in the discharged developer, the proportion of the carrier may deviate upwards or downwards from the content of the carrier in supplied developer.

The replacement of the developer becomes even and constant. carried out, as is the case with the device according to the above-mentioned US patent, so at a large change cycle number, the amount of carrier in the developer station can always run up or down. This means that in extreme cases, the development station may overflow or run empty, rendering the printer or copier inoperable. cυ υ N) M μ »H¹ cπ o Cπ O Cπ O Cπ ω> Hl ^ = ε r + σ rt Φ φ er> rt «Φ P ^ H¹ 3^* he Cd <! o Hi 2 ii r + d H DJ DJ φ Φ J Φ μ- Φ d Φ μ- Φ J μ- DJ μ- DJ er Φ d 3 O Φ μ- H o φ φ d

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the flowable medium is replaced gradually. Each developer station receives a fresh aging component from a reservoir common to all developer stations, in particular carrier material in the case of a two-component developer. Furthermore, each developer station has a separate toner reservoir, from which toner of the respective color is supplied to the container of the respective developer station. In this way it is possible to supply a plurality of developer stations with different colored toner material together with carrier material, so that in each developer station the aging carrier material is gradually exchanged. So it must not be made for each developer station, a separate exchange of carrier material or developer.

The invention will be explained in more detail below with reference to exemplary embodiments according to the figures of the drawings. Show it:

Figure 1 shows a first embodiment of a device according to the invention;

FIGS. 2A to 2C show an exemplary embodiment for determining a predetermined amount of a flowable medium for the

Feed to the device of Figure 1;

Figure 3 shows a second embodiment of a device according to the invention;

Figure 4 shows a third embodiment of a device according to the invention;

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ren tip a predetermined developer level level 17 '' defined.

If a predetermined amount of fresh developer or carrier 14 is supplied to the container 10 via the feed inlet 13, the filling level rises above the predetermined developer filling level 17 "and, because the discharge outlet 15 is in the range of the predetermined developer level 17 ", the same amount of aged developer 16 is removed via the overflow 17. The filling level in the container 10 therefore regulates as a function of the predetermined developer filling level 17 "and the feed rate itself. The process continues until the predetermined developer filling level 17" has been reached again.

The feed inlet 13 and the discharge outlet 15 are preferably arranged on the container 10 such that fresh developer or fresh carrier 14 supplied during the replacement operation can not flow off together with the aged developer 16. This is in the embodiment of Figure 1 of

Case, when the inlet and outlet 13 and 15 is arranged on opposite sides of the container 10.

FIGS. 2A to 2C show an exemplary embodiment for the measurement of a predetermined amount of fresh developer or carrier 14. In a tube 20 leading to the feed inlet 13 according to FIG. 1 into which fresh developer or fresh carrier 14 is introduced from above, two are clocked Valves 21 and 22 in succession or provided with each other.

In a first phase according to FIG. 2A, the valve 21 is open and the valve 22 is closed, so that fresh developer or fresh carrier 14 is guided in the direction of an arrow D through the tube 20 to the closed valve 22. The opening time of the valve 21 defines a certain amount of fresh developer or carrier 14. In a second phase of Figure 2B, both valves 21 and 22 are closed, whereby the predetermined amount of developer or carrier to be supplied to the mixer 10 of Figure 1 is measured, ie this amount is included between the two valves 21 and 22.

In a third phase according to FIG. 2C, the valve 21 is closed and the valve 22 open, so that the amount of developer or carrier located between the two valves 21 and 22 flows in the direction of an arrow E to the developer feed inlet 13 according to FIG ,

Figure 3, in which the same elements as in Figure 1 are provided with the same reference numerals, shows a second embodiment according to the invention, in which, in contrast to the embodiment of Figure 1, the supply of fresh developer or carrier 14 on the removal of aged developer 16 regulated becomes. As in the embodiment of Figure 1 is also in this embodiment is a self-regulating device by a predetermined developer level in the container 10. In Abfuhrauslass 15 a clocked valve 30 is provided, the opening time determines the amount of discharged aged developer 16. As a result, the developer fill level drops by a corresponding amount and the same amount of fresh developer or carrier 14 is supplied via the feed inlet 13.

In the exemplary embodiment according to FIG. 3, the developer supply inlet 13 must terminate at least with the desired developer filling level. The exact vertical position will continue to depend upon the pressure developed by the mixture in the developer sump 12 at the given developer fill level to block the flow of fresh developer or carrier 14 through the developer mix itself. The removal of aged developer 16 reduces the total amount of developer in developer sump 12 and thus leads to a decreasing developer level and at the same time a decreasing pressure at the outlet of feed inlet 13. Fresh developer or carrier 14 can be supplied by this decreasing pressure at feed inlet 13 , This process continues until the predetermined developer filling level is reached again or

The determination of a given amount of developer or carrier to be supplied in addition to the setting via the valve

Alternatively, by suction or a screw conveyor in the lower part of the developer sump 12, which is not shown in FIG.

In the embodiments of Figures 4 and 5, in which the same elements as in the previous figures are provided with the same reference numerals, the predetermined level level is defined by a level sensor 45.

In the exemplary embodiment according to FIG. 4, the valve 30 in the discharge outlet 15 is actuated in a clocked manner via a control module 44, the opening time of which determines the amount of aged developer that has been removed (compare FIG. 3).

By the level sensor 45 is determined whether the developer in the container 10 has reached the predetermined level level or not. A decision is made in accordance with a control block S1 as to whether or not the fill level "full" has been reached: If this is not the case, ie if the decision "no" is made, a valve control module 4 is actuated, which in turn is a valve 30 ', via which fresh developer or fresh carrier 14 is supplied to the feed inlet 13 via a feed pipe 20. This takes place until the fill level sensor 45 detects that the predetermined fill level has been reached again CO co IV) PO μ¹ P "

Cπ o Cπ o cπ o cπ

Hl ≤ Ps rt CL 3 P? ua Tl s: s: Pt CL σ ω_^ o CΛ 3 C tn α α Ph d rt 03 cn Φ CΛ H t μ- o μ- φ μ- σ μ φ P- P- μ- cn DJ μ- Φ rt l_i- CL O μ- DJ O Φ Φ μ 3 d Φ Ω μ P^» cfl

1 Ω 3 o 3 μ Φ Hl ua μ μ μ rt EP φ 3 φ DJ φ Ω Cfl μ 3 μ μ- 3 μ- 3 3 rt s tr N 3 CL <! μ-: d CL tn d 5 μ ua^* ω and others 3 φ O CL φ and φ φ O Cfl 3^" μ α CL> φ φ rt <^ er Ω PO μ CL P-CL μ CΛ 3 μ μ μ CL μ Φ μ ps- CL μ DJ J Φ μ μ 3 rt O π P- Φ 3 "PO φ> dφ φ et and P ^ 3 d ua rt Ti φ DJ 3 ω tn μ Hl rt φ μ- μ μ ua μ- φ 3 d Cd μ

Φ DJ μ Φ μ Φ Hl Φ μ- Cfl Hl d •_^ rt Ω O Cd ua s: d CL 3 φ rt cn 3 Cd

3 DJ Ps^" Ω cn d: 3 N 3 CΛ Z <! O tr μ 3 "H_l cn Φ μ- μ φ μ- tn Hl rt J ^ 3 τ | cn et C 3^{^} φ μ φ <et P- O μ O rt Hi ua μ Φ 3 Cd 3 TJ d: Ξ J-> rt d: μ-m μ- Φ 3 3^* Cd μ- ua Φ Φ <μ ua DJ DJ Hl • Φ s: φ 3 3 φ μ 3^* μ- .. CΛ H¹

3 o O P- et Φ φ H3 3 ua φ 3 d Φ ua rt d tn Hl 3 μ- er <rt Φ μ Ω Ω P "

C 3 3 3 tfl μ- 3 O ^■ et et DJ et Φ J Φ Cfl Φ H μ Φ Hl O φ s: he Ω d P? 3 3^" cfl

Φ Φ Ω 3 3 s: I- "P- μ d ua tfl P¹ Cfl 3 tn CL 3 Φ> 3 μ- Φ 3 "3 P- Φ rt

PO μ H3 μ tr Φ cn Φ μ- Φ rt P- er Φ O DJ Φ * »et O Φ tn rt Ω Cfl Φ ua φ Ω P- DJ tK φ 3 μ- μ Ω μ- Φ CΛ τι tr EP μ - he CL rt he μps- rt 3 CΛ μ 3^{^} 3 he μ- DJ μ- 3 NP? 3 μ et od: Φ 3 CΛ CL DJ • ^ ua μ-^j μ- CL er rt d CL μ- 3 p- CL P3 CL d rt Φ Ω 3 DJ P¹ Φ O μ- α er d: φ tn Φ Φ g Φ O 3

CΛ 3 cn cn d O Hi d> Φ d P? φ 3 Cπ μ Φ Φ Φ ω μ 3 CL μ- CL 3 ua 5 φ et 3 3 d 3 d μ Φ Cfl ua Cfl s: cn μ μ- (_. rt PO PO rt Φ cn Φ Φ <!

P> μ Φ ua Φ σ ^* ua tn μ C rt ^ Φ ua Φ μ cn Φ n P¹ o Φ 3 TJ μ 3 "r O o 3" d: P- μ μ- μ Cfl Hi Cd 3 PO PJ d: -> φ μ- μ CL IS! φ rt CL μ- μ

DJ er 3 ua Ps Φ tn d: 3 O 3 μ DJ rt CL Φ d μ- DJ 03 d φ 3 ^ Φ P3 DJ \ -> o \ ° ^ μ- Φ O er et 3 "rt α CL er co μ tn 3 3 rt Φ 3 μ Φ μ- P "μ DJ -;

, he μ- CΛ et 3 Pl N PJ μ s: d μ- ω μ- et rt φ C ** • N CL 3 ua DJ: 3

Ω o μ N os: et d μ- P- "Φ 5 rt fl Φ CL PJ ^ DJ fl d P3 and others d 3 ua et al. Φ d α tr o Φ 3. Μ- 3 Ω <! DJ μ DJ Cfl DJ 3 Cd 3 d ua PO μ Φ μ DJ Φ Φ Φ μ

P- Φ Φ P-¹ H) 3 φ O ua Pscd o 3 Q. rt tn 3 P- he PO DJ: φ Ω μ ω rt μ

3 CΛ μs: Hi rt μ ι-3 3 cn μ- rt P "CL Φ Φ <P- rt <ua ua he 3 3^" rt μ s: φ φ μ pr μ er φ 3 Cfl μ μ <Φ _^ ^ d Λ Φ Φ s: φ N φ O 2. i- *

Hl Cd Φ μ 3 PJ o PJ: Φ μ 3 tfl ^ 3 Φ 3 d: Ω DJ Φ 3 P- μ ≤ PO τ | * - d Hl Ω

PN: 3 P- rt rt 3 ua μ- μ- P- Ω P- • n Cd 3 rt 3^" d μ o μ •> μ- Φ Hi tr

1 rt cn s: μ- N Φ 3 cn P¹ Ω 3^" ua <d: 3 rt μ- • H "Φ g CL P> ua 3 μ Φ et

S! s. Φ μ- μ Φ μ TJ CT 3- Φ Φ Φ rt P- 3^* cn Pd: Cd § J-. Φ er φ rt 3 *% φ P-cn μ 3 3 N CL μ- μ μ μ DJ ≤ P-> D⁾ rt CL er 3 Φ PJ μ- μ- μ tr ^_* μ Ω DJ rt CL tn rt d φ φ 3 C DJ d cn μ- 3 DJ d φ rt 3 d N 3 c μ α rt Ps-}^• - "tn μ P μ H" Φ 3 d CL rt Ω CO Cfl Φ 3 3 μ s: • Hl d cπ α cn.

Cfl O Φ DJ d 3^* Φ 3 Φ ≤ DJ Ps "O rt tn CL ua cn μ- ua he ONO 3

<! Φ CL o 3 rt 3^* N φ μ - ua P- 3 Φ Ω Ω σ CL Φ Φ O s: d tr •

O μ T3 Φ er cn μ- μ € P- μ d φ CL φ DJ d ≤; 3^" rrd μ-lh cn μ- and others • X

3 ω μ μ O0 Φ 3 DJ; 3 tn μ 3 Φ P- <! Φ μ H "μ Φ d: rt 3 μ Φ P- s:

O CL μ 3 N μ- Φ er DJ 3 rt Φ Φ cn μ μ O 3 μ- Φ Ω 3 "μ- μ- Hi Φ μ μ-

CTi α N 3 μd μ ua 3 Φ Φ μ 3 P¹ rt d α P "DJ: rt μ 3^{^} > μ 3 rt d: cn CL μ

Φ Φ μ- Φ co H3 3 ua Φ ua μ- μ tn c Φ 3 EP rd rt 3 d = "o \ o Hl 3 Ω OP Φ <! H Φ 3 tn Φ O d ua Φ Φ μ- CL ω • rt N er μ 3 CL μ- rt ^" ι-3 3 ω O d = Cfl i Ω μ μ N Φ tn μ- CL 3 3 Φ HI Φ ≤: Φ rt μ- DJ μ- er 3 s: et o φ μ- μ- o P- 3^* et 3^* μ d μ 3 3 Φ Φ 3 d = t J ω φ μ • μ tn 3

Φ μ- Φ • 3 μ 3 ω 3 P "μ Φ ua μ Φ ua rt o Φ μ 3 tr 03 3" d μ- CL cn Φ μ φ Hl Ω CL tfl rt d Φ μ- μ- cπ Φ "_^ CL μ DJ φ ^t* l μ μ <φ <CΛ

PJ μrt σ μ DJ 03 tr Φ et. Φ rt rt Ω Hl d Cd Φ CΛ rr 3^* d: do <μ- Ps- Φ rt ua et μ- sT Cfl Φ 1 μ: μ μ rt 3-Hl d:: P * 3 μ- et Or- 3 ^>n ω 3 φ 3 ω rt • α φ o cn 3 "03 rt 3 rt O φ rt φ 3^* he rt Ω Φ OP¹ inter alia dd 3 φ μ-rt dφ cn 3 rt PJ: φ φ CL •_^ Hi 3 Cfl μ Φ Cfl 3^J d α rt ω Φ 3 3 rt 3 P- φ

Pl tfl Φ N "tr P- Hi • μ rt ri- μ J-» Ω rt φ φ φ rt 3 φ μ- Cd P "μ

CL • Φ rt DJ: Pd ua CL Φ cn Cfl 3 μ μ μ PJ et 3 H μ- Hi DJ er

PJ TJ cn ι-3 3 d: Φ Φ 3 rt s: CL DJ Φ μ- er 3 3 μ- Φ 3 μ 3 μ^> εp p- Φ O et he μ rt ua DJ tr •. Φ H- DJ 3 μcn P¹ CL DJ o DJ 3 μ P- tfl O cn 1 3 μ Φ φ φ d • tr P-¹ H tfl ua α r O o ω Ω 3 3 μ- 1 rt Ω μ- Ω Φ DJ μ P¹ μ P¹ Cfl cn • CL φ d Ω φ tr O Ω Φ Ps¹

3 3^* μ 1 O 1 1 φ O rt "1 3 Ps 3 μ> 3^{^} d Φ 1 cn ua 1 1 1

100 g of developer 6 g of toner are included. The toner supply takes place from a toner reservoir 35 containing toner 36, on which a toner conveying roller 37 is provided, which is driven by a drive motor 38.

If it is determined that the toner concentration TK is less than the setpoint value S, ie if the decision "yes" is made in the control block S3, then a drive module 43 for the drive motor 38 is actuated, which in turn drives the toner feed roller 37 in the direction of the supply of Toner is actuated to the container 10.

By means of the two-component developer, which, as mentioned, is composed of toner and carrier, an intermediate carrier 34, which may be a drum with an electrophotographic layer, is dyed via a inking roller 33.

A drive motor 31 for the paddle wheel 9 is controlled via a control module 41 with a time counter 42. From the time counter 42, a replacement interval T is set within which each fresh developer or fresh carrier 14 is supplied. As already described with reference to the exemplary embodiments according to FIGS. 1 and 5 in conjunction with the exemplary embodiment according to FIGS. 2A to 2C, in the case of a decision in the control block S4, the exchange interval T has expired, that is to say when t = T is the decision "yes", the valves 21 and 22 via the Ventilansteuermodul 44 in terms of the supply of fresh developer or carrier 14 to the mixer 10 via the supply inlet 13 is driven. In a decision "no", ie the exchange interval T has not yet expired,

FIG. 7 shows an exemplary embodiment with a plurality of developer stations 50, 51, 52 for a pressure, each with a different PO PO μ> μ> o Cπ o Cπ o cπ

CL d; r DJ rt 3 3 α rt CΛ 3 cn cn rt s3 P- Cd C ua φ 3 CO X 3 <α CL

Φ 3 Φ d μ P- O μ- μ- Φ ^ PJ Ω rt Φ Φ cn μ- φ Φ μ- Φ Ω PJ Φ o DJ Φ

3 PJ μ- Ω DJ CΛ ua Ω Φ 3 cn 3- Φ 3 Ω rt 3 3 3 3 P- tr 3 μ- μ CΛ 3 er rt ^* d Ω μ 3^* rt rt DJ 3 1 3^" Hi 3 μ CL 3 μ tn Φ

N "Ω ^" DJ rt <! P- Φ d Hl cn Cd cn CL s: DJ? R DJ ω μ- tn DJ 3 d PJ: DJ d 3^J io 3 3 3 rt 3 Φ DJ μ-μ PJ 3 DJ Φ CJ rt DJ

3 p¹ 3 Cfl Hl μ- 3 μ ua Φ to rt H μ Ω σ 3 3 σ Φ 3 tn d T!

€ ua CΛ tfl ω d ω Hl DJ 3 0 s μ- tr μ- 3 Φ Φ Φ μ σ CO DJ

Φ μ- «3 rt μ Ω μ et P¹ d Φ s: μ- φ 3 et and others • μ- 3 3 N φ tn μ

Ω and others P⁾ H¹ O 3^" φ P- Hi μ- μ- Ω P- μ- Φ 3 •> • d 3^" Ω he

3 "* = Hl DJ Φ h φ N 3 Φ φ P? 3 N ua 3 α t-¹ d ua DJ = tr Φ ω <! rt cn Hi¹ d = φ EP φ φ Cfl P^J Φ d Φ Φ cn Φ = tn Φ 3

Φ o Φ Cfl Φ cn μ 3 Hi P-cn o Φ tn μ H3 μ Φ P- σ i Hi rt P- •

3 μ P- 3 φ Φ CL PJ: et Hl "μ Cfl O er rt Φ d: d: Φ Φ

3 3 ua μ Φ 3^" <3 tn Hl φ <3 J μd μ 3^* 3^* μ P 03

CL 03 CL Φ DJ cn DJ: H "Φ P- OO μ- Φ ^» P¹ tr o Φ d DJ: 3 μ μ Φ

Φ μ- Φ 3 μ φ rt φ μ ua tr μ φ P- Φ μ μ cn tn ua ι_. d rt co P- μ-

3 P μn φ 3 rt ua φ φ 3 so Ω α φ φ DJ: et P>: 3 φ φ h μ 3 "EP φ d φ Cπ £ ua ua ≤ tr CL h Φ 3 P μ rt μ d ua DJ: PJ 3 Hi μ- 3 Hl cπ cn Φ co μ- μ-

P^J 3 Φ Ω rt Φ Φ O rt 3 φ tr C Λ Φ DJ: CL CL μ- »fe. P- er μ Φ Hi Φ

P- et CL f • • * μ Hl Φ φ φ er P- rt 3^" DJ P^< DJ Φ C 3 μ cn

Φ s: μ- 3 o μ CL 3 Φ ua μ- σ P- Cfl Ps rt DJ er CO μ- • μ- φ

EP Pdd • CL o rt et P- 3 3 Φ to 3 ua cn Φ DJ Φ 3 ua fl Cd Cfl 3

Hi Ω 3 3 μ- O Φ d rt Φ 3 Ω rt Φ ω 3 μ ua Φ Φ TJ cn 3 Ω

DJ: Ps- ua o φ ω u 3 3 3 3 3^* Φ 3 φ 3 rt φ Hi P- μ- φ rt tr ^" H "o ω DJ 3 μ P- 3 φ μ μ-> φ cn d: 3 φ DJ s: φ d μ- d CL cn he 3 DJ> 3 ω ^ d φ he 3 3 d 3 Ω tr Φ H" μ- μ cn and others 3 φ ^ Φ μ- Φ hd O: d: CL to μ φ φ tn μ-Cd 3^{^} μ 3 Φ rt Ω

Φ ua μ cn P- rt μ μ- Cfl ua μ^> P- TJ φ C μ Hl Ω 3 rt φ ps- m

3 cn et P- tfl Hi φ d μ Ω P- co d: tr rt O 3 μ μ g: ω cn DJ φ ^ DJ DJ: Ω d: P- μ cn 3 d tr d φ 3 "et s: Cfl he PJ rt d DJ: μ

3 ^ d 3 JP¹ d tr tr Ω rt Cfl 3 d 3 μ- μ μ- CΛ ≤: Hi Ω Φ 3 ua d φ cn Ω φ 3 et et φ μ 3^" pς D> ua 3 cn rt d € Ω Φ od tr μ ua φ 3 rt 3^* 3 Φ φ • * • d O 3 d 3^" among others _^ tn 3 Φ ps- 3 σ tr fl μ ua μ- Φ 3 μ μ 3 P- 3 Q. 3 DJ ua μ- Φ Φ μ α M to cn φ 3 d p- Φ 3 et 3 ua tn N ω CL Hi CL 3 φ cn rt φ cn μ- J φ 3 rt er

3 Φ 3 rt tn CL Φ DJ CΛ et Φ 3 rt φ DJ: μ- er Φ μ d 3 rt DJ 4-> Φ

3 Φ 3 ua he • 3 P- DJ Φ cn 3 3 Φ μ is CL cn ≤ rt μ-

DJ CΛ Φ tfl 3 3 Φ et <3 H μ- cπ; μ- ^ μ- P- DJ fl μ cn "<μ- P-> φ μ- μ φ CL ω P- p - ω <! cπ ps- φ PJ P- Ω O d TJ er P- tn 3 Ω Hi μ et cn PJ PJ Φ 3 Φ oo TJ Φ tn cn ua rr 3 cn μ- φ 3 rt Φ 3^* rt O TJ rt d μ et ^" 3 μ μ Φ O Φ cn d P¹ Φ Φ μ- CL Φ μ μ - - ua μ- μ- cn Φ Φ μ rt Φ 3 3 μ φ 3 α rt 3 er φ μ φ o μ μ μ- CL μ- φ rt Hi P¹ Φ μ φ φ d φ Pl φ EP to DJ 3 d: to d φ φ 3 cn 3 tr P- er cπ 3 Cπ 3 p-

3 3 μ P- Hi o Hl φ er Φ 3 cn d C DJ: H¹ Hi ≤ O to

• α tr DJ: tn PJ: 3 μ- CL Φ μ- ua Cfl μ- 3 Φ rt d: d »μ- ua rt

DJ ua J tr CΛ Φ Φ μ rt Φ E l Φ DJ rt rt Φ 3^" 3 μ Φ

3 3 φ μ- μ- Φ Ω P- μ cn 3 s: μ Ω μ μ CL er CL P- 3

U2 <!

P-CL μ φ μ 3^" eg CL Φ Φ μ-tr s: <! d μ- - CΛ φ O rt φ Hi P¹ Φ 3 Φ 3 ^ μ- CL Cfl P- μ- Φ Φ Cπ 3 Φ Cfl μ- μ

H¹ P "ω 3 φ O φ μ- φ pr Ω TI μ μ co and others P- ≤ cπ 3 and others

DJ 3 d ≤ TJ O 3 3 φ μ α o 3^" μ-CL cn 3 cπ μ-PO cn Φ

H *_* CΛ φ <μ CL TJ ua μ 3 φ ua φ Ω φ d: φ φ DJ tn rt Cfl P- φ DJ φ cn o φ 03 Cd d TJ μ d 3 3^* μ σ μ he and others 3 Φ

Φ α P cn μ P? μ P- 3 Cfl φ μ- Ω o μ • μ- i φ φ DJ φ φ 3 μ μ- ua φ 1 1 Ω φ DJ μ- ua Ps- 3 φ O μ ua 1 3 1 3 Φ

3 φ 1 μ-tr 3 3 σ φ tn φ ^ 1 1 P "φ 3 1 o 1 rt Φ 3 3 1 l

1 Φ 1 1 1 1

Reference sign list

9 paddle wheel

10 containers

11 flowable medium; developer

12 developer sump

13 feed inlet

14 fresh flowable medium; Developer or carrier

15 discharge outlet

16 aged fluid medium

17 overflow

17 'overflow nose

17 '' 1 level level

18 paddle wheel blade

20 feed tube

21, 22, 30, 30 'valve

31 drive motor

32 concentration sensor

33 inking roller

34 intermediate carrier

35 toner reservoir

36 toners

37 conveyor roller

38 drive motor

39 carrier tank

40 collection container

41 control module

42 time counters

43 control module

44 ₄ control module

45 level sensor

50, 51, 52 developer station

53 cyclone filter

54 blowers

55 aged developer

56 line S1, S2, S3, S4 control blocks

S setpoint

T time interval