EP0665966A1 - Pneumatische tonerfördereinrichtung für ein electrografisches druck- oder kopiergerät. - Google Patents
Pneumatische tonerfördereinrichtung für ein electrografisches druck- oder kopiergerät.Info
- Publication number
- EP0665966A1 EP0665966A1 EP93922939A EP93922939A EP0665966A1 EP 0665966 A1 EP0665966 A1 EP 0665966A1 EP 93922939 A EP93922939 A EP 93922939A EP 93922939 A EP93922939 A EP 93922939A EP 0665966 A1 EP0665966 A1 EP 0665966A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- toner
- filter
- dirt particles
- pneumatic
- conveying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/10—Collecting or recycling waste developer
- G03G21/105—Arrangements for conveying toner waste
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
- G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
- G03G15/0856—Detection or control means for the developer level
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
- G03G15/0877—Arrangements for metering and dispensing developer from a developer cartridge into the development unit
- G03G15/0879—Arrangements for metering and dispensing developer from a developer cartridge into the development unit for dispensing developer from a developer cartridge not directly attached to the development unit
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
- G03G15/0887—Arrangements for conveying and conditioning developer in the developing unit, e.g. agitating, removing impurities or humidity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S222/00—Dispensing
- Y10S222/01—Xerography
Definitions
- Pneumatic toner delivery device for an electrographic printing or copying machine
- the invention relates to a pneumatic conveying device for an electrophotographic printing or copying device with a device for returning excess toner to the developer station.
- a latent image is generated with the aid of a character-generating device on an intermediate carrier and is colored with toner in a developer station.
- the toner image is then transferred to the recording medium in a transfer printing station and fixed in a fixing station.
- it is necessary to clean the intermediate carrier from adhering residual toner This can be done with the aid of a brush and vacuum in a brush cleaning station.
- This waste toner is usually collected in a collection container in the device and thrown away from time to time. A reuse of this waste toner was previously not envisaged, since only fresh toner can be processed in devices with high print quality requirements.
- the aim of the invention is therefore to provide a pneumatic conveying device for an electrographic printing or copying device with a toner return device, in which the waste toner produced in the units of the device is easily returned to the developer station and reused can without affecting the print quality.
- Another object of the invention is to design the device so that the toner delivery can easily be adapted to different print quality requirements.
- a toner recycling device can be arranged in a simple and functional manner in the conveying device which separates the recyclable toner from the extracted waste or excess toner and the developer station. feeds again. Dirt particles and other particles that negatively affect print quality are disposed of separately. This advantageously extends the operating time of the device with a predetermined supply of toner without it having to be renewed frequently. The amount of non-recyclable toner and dirt particles is reduced to a minimum.
- the pneumatic conveying device can be used at the same time to remove other particles which interfere with the printing operation, such as paper abrasion or punched particles from units required for paper transport, such as e.g. to remove and collect the paper brake.
- the pneumatic conveyance simplifies both the control of the supply of fresh toner and the control of the return of the cleaned toner to the developer station and is not susceptible to faults. Since there is constant negative pressure in the conveyor system, even in the event of leaks in the system, no toner dust can escape and contaminate the device. The entire toner handling is considerably simplified.
- the toner recycling device is designed as an independently replaceable structural unit.
- a collecting container for the waste toner can thus be arranged in a simple manner instead of the toner recycling device.
- the toner recycling device device can be arranged anywhere in the device. Since, in addition, the amount of residual toner accumulated is measured, the toner can be returned depending on the amount of residual toner.
- the particle filter used for the separation is cleaned automatically without the filter having to be removed from the device.
- the pneumatic filter device serves both to supply fresh toner to the developer station and to return the toner. This means that an existing pneumatic conveying system for fresh toner can be expanded by a toner return device without substantial and complex design changes depending on the requirements on the device. The technical effort for a toner return system is significantly reduced. Since the developer station is supplied with toner controlled by a two-way valve on the one hand from a storage container for fresh toner and on the other hand from an intermediate container for recyclable toner corresponding to the fresh toner, the toner supply is buffered. The supply of fresh toner and the mixing in of recovered toner can thus be controlled depending on the operating state. A sudden toner depletion in the developer station due to high toner consumption can easily be compensated for.
- FIG. 1 shows a schematic functional circuit diagram of a pneumatic toner conveying device for an electrographic printing device
- FIG. 2 shows a sectional illustration of a toner recycling device arranged in the pneumatic conveying device with an associated toner directional control valve
- Figure 3 is a sectional view of the Tonerrecycleeinrich ⁇ device in the normal state during printing
- Figure 4 is a sectional view of the Tonerrecycleeinrich ⁇ device during the toner return during printing
- FIG. 5 shows a sectional illustration of the toner recycling device in cleaning operation
- FIG. 6 shows a schematic perspective illustration of an alternative arrangement of a toner recycling device or a toner collecting container in the device
- FIG. 7 and FIG. 8 exploded views of the toner recycling device
- FIG. 9 is an exploded view of a toner control valve.
- An electrophotographic printing device for printing on continuous paper contains a developer station 10 for coloring a charge image generated on a photoconductor drum with the aid of a developer mixture of toner particles and ferro-magnetic carrier particles.
- the developer station 10 is divided into a developer station housing 11 for receiving application elements such as a magnetic brush, toner transport roller etc. and a metering device 12 arranged above the developer station housing 11 for metered supply of toner 13 to the developer station housing 11.
- At the developer station side ⁇ housing 11 there is an emptying opening 14 for suction of the developer mixture from the developer station housing and a suction line 15 for suction of the toner dust which arises during the developer process in the area of application elements.
- a toner box 16 assigned to the metering device 12 contains a filter space which serves as a buffer space for the toner and which is covered by a toner filter 17.
- the toner filter 17 is semicircular, wherein between the toner filter
- Toner box 16 is an air transport channel 18 which is guided up to a connection area on the toner box.
- an electrically controlled closure device in the form of a suction cycle valve 19 which electrically controls the air transport in the
- Air transport channel 18 interrupts or releases.
- the filter space contains a scraper 21, which is driven by a motor 20, for mixing the toner 13, and a toner level sensor 22, which capacitively determines the toner level in the filter space, for example.
- a toner delivery line 23 for supplying toner into the filter space by applying a vacuum to the air transport channel 18 with the suction timing valve 19 open.
- the toner 13 settles in the filter space and becomes from the doctor blade 21 mixed, the doctor blade 21 also brushes along the inside of the toner filter 17 and so keeps the filter clear.
- Below the filter space there is a feed device, not shown here, with a toner metering device, for example in the form of a foam roller resting against a wall, which feeds the toner to the developer station housing 11 in a metered manner.
- the toner conveying device furthermore has a particle separator 24 in the form of a cyclone filter with a toner recycling device 25 arranged below the cyclone filter 24, the construction of which will be explained later.
- the cyclone filter 24 is coupled via the suction line 15 to the developer station housing 11, via a suction line 26 to the air transport channel 18 of the toner box and via a suction line 27 to a cleaning station 28 for the photoconductor drum, in which case the suction line 26 an electrically adjustable throttle valve 29 is arranged to the cleaning station 28 with cleaning brush.
- the throttle valve 29 In the throttle drive, the throttle valve 29 is in the 45 * position shown, ie the partial vacuum present is reduced by partially closing the suction line 27. In cleaning operation, it is pivoted into a 90 * position and the suction line 27 is thus opened. The vacuum is now fully applied to the cleaning station.
- the cyclone filter 24 is connected via a further suction line 30 to a device 31 generating negative pressure.
- FUMES air distributor 36
- a vacuum paper brake 37 arranged in the paper transport channel of the printing device is coupled to the suction line 30 via a further suction line 38.
- the negative pressure on the paper brake 37 is electrical adjustable throttle valve 39 and a solenoid valve 40 ge controlled.
- a suction line 41 which connects the toner recycling device 25 to the toner delivery line 23, is used to feed the toner recovered via the toner recycling device 25 to the toner box 16 of the developer station.
- the toner conveying line 23 is also coupled via a suction line 42 to a toner reservoir 43 for fresh toner.
- the toner reservoir 43 contains an interchangeably arranged toner bottle 44 and a suction tube 45 that can be inserted into the toner bottle 44.
- a suction tube 45 that can be inserted into the toner bottle 44.
- ambient air is sucked in via the suction tube 45.
- a toner supply valve 46 is arranged in the form of a two-way valve, with which the suction lines 41 and 42 can alternatively be opened and closed. The structure of the toner supply valve 46 will be described later.
- the toner delivery in the toner delivery system is controlled via a control arrangement 47, which can be part of the device control of the controller of the device.
- the controller is a conventional microprocessor-controlled controller which is connected to a control panel 48 of the device via a bus line.
- the operating parameters of the device such as printing width, fixing temperature, printing operation, cleaning operation, etc., can be entered or set in a menu-controlled manner via the control panel 48.
- Coupled with the controller or part of the device control is a measured value acquisition and control Order 49, which serves to detect and implement the signals received by the various sensors of the toner conveying device and to control the toner conveyance via the negative pressure.
- it is constructed as a conventional microprocessor-controlled arrangement.
- the toner conveyor is used to transport toner and particles in the printing device. Among other things, it enables fresh toner to be transported from the toner storage container 43 to the developer station 10, a mixture of toner and dirt particles to be sucked out of the developer station 10 and the cleaning station 28, and the cyclone filter 24 to separate the mixture from the air stream in the toner recycling device 25 to separate into recyclable toner and into dirt particles and to feed the separated recyclable toner to the developer station 10 again. Furthermore, it enables the separated dirt particles from developer station 10 and cleaning station 28 and from paper brake 37 to be collected in fine filter 32 of vacuum device 31. For all of these
- Functions are controlled in a function-dependent manner and are applied to the various aggregates, such as storage container 43, developer station 10, cleaning station 28, paper brake 37 and tonrecycle device vacuum 25.
- the toner recycling device 25 contains a filter space 50 with a coin area 51 to the cyclone filter 24 and an outlet area 52.
- a particle sieve or particle filter 53 is arranged in the mouth area 51.
- a controllable closure flap 54 closes or opens the outlet area 52.
- the filter chamber 50 also has an air supply opening 55. Associated with the air supply opening 55 is an electrically actuable solenoid valve 56 which, if necessary, opens or closes the air supply opening 55 and thus connects the filter space 50 to the ambient air. Coupled to the filter chamber 50 via its outlet region 52 is a toner settling chamber 57.
- the toner settling space 57 is funnel-shaped and is coupled to the suction line 41 to the toner box 16 via a mouth area 60. It also contains a toner sensor 61 for determining the toner fill level in the toner settling space 57 by capacitive measurement.
- the filter space 50 and the toner settling space 57 are arranged in a housing 62 which accommodates the functional elements of the recycling device. These are: The particle sieve 53, e.g. from a wire mesh, which is interchangeably arranged in the mouth area 51 to the cyclone filter. The solenoid valve 56 for opening and closing the air supply opening 55. The controllable closure flaps 54 and 59 on the filter space 50 and on the toner settling space 57, as well as the associated drive elements for actuating the closure flaps 54 and 59.
- closure flaps 54, 59 are pivotally mounted on axes of rotation 63 which project out of the housing 62 on one side (FIG. 7).
- Closing springs 64 are arranged on the outwardly projecting axes of rotation 63, which cooperate with actuating elements 65.
- the actuating elements 65 deru are connected via push rods 66 to a drive element 67, which is coupled via a toothed belt 68 to a drive shaft 69 of a geared motor 70.
- An axle 71 receiving the drive element 67 for the push rods 66 protrudes with its opposite axle end from the housing 62 (FIG. 8) on which a position sensor 72 in the form of a magnet is arranged.
- This interacts with three position sensors (Hall sensors) H1, H2 and H3 fastened on a support plate 73. They serve to scan the position of the axis 71 and thus to scan the position of the flaps 54 and 59.
- the support plate 73 also receives a control module 74 in the form of a circuit which can be connected to the control arrangement 49 via connections 75.
- a differential pressure sensor 76 is arranged on the support plate 73, electrically coupled to the control module 74.
- Two pressure lines 77 of the differential pressure sensor 76 open below and above the particle sieve 53 into the mouth region 51 of the filter chamber 50. Via the differential pressure sensor 76, they detect the differential pressure at the particle sieve 53 and thus the degree of contamination of the particle filter 53. If the differential pressure is high, it is the particle sieve 53 is dirty and therefore impermeable. The particle sieve is permeable when the particle sieve is not contaminated.
- the flaps 59 and 54 close depending on the rotational position, the closing taking place against the spring force of the closing springs 64. With a corresponding further rotation of the axis 71, the flaps 54 and 59 open again automatically under the action of the closing springs 64.
- the toner supply valve 46 for opening and closing the suction lines 41 and 42 (FIG. 1).
- the toner supply valve 46 consists of two silicone tubes 79 arranged in a carrier 78 with connecting pieces 80 for the suction lines 41 and 42. Between the silicone tubes 79 there is a a drive motor 81 rotatable eccentric roller 82 which depending on its rotational position squeezes the silicone tubes 79 and thus closes or opens.
- a magnet 83 Arranged on the eccentric roller 82 is a magnet 83 as a position transmitter which interacts with position sensors (Hall sensors) H4 and H5. These are fixedly assigned to the carrier 78.
- the position sensors H4 and H5 deliver a scanning signal to the control arrangement 49 of the controller 47.
- the toner recycling device 25 can be set in three operating states, which essentially differ in the different flap positions of the flaps 59 and 54 and the setting state of the toner valve 46. These are:
- FIG. 5 cleaning state for cleaning the particle sieve 53 and for returning the dirt particles into the fine filter 32 of the vacuum generating device 31, if necessary, for example during a print pause.
- the air valve 56 of the filter space 50 is closed, as is the air supply opening 58 of the toner settling space 57 via the flap 59.
- the flap 54 assigned to the outlet area 52 of the filter space 50 is open.
- the suction line 41 is hermetically sealed via the toner supply valve 46.
- Non-recyclable, large clumps of clumped toner or dirt particles 84 remain retained in the cyclone filter 24 by the particle sieve 53.
- the suction line 42 is opened. If, depending on the output signal of the toner filling level sensor 22, the toner box 16 is requested, the suction arrangement valve 19 is opened in a controlled manner by the control arrangement 49 and thus negative pressure is applied to the toner delivery line 23. The air flow thus generated in the suction pipe 45 of the storage container 43 transports fresh toner from the toner bottle 44 into the toner box 16.
- the recyclable toner is returned to the toner box 16 of the developer station during printing operation (FIG. 4).
- the flap 54 of the filter space 50 is closed and the flap 59 of the air supply opening 58 of the toner settling space 57 is opened via the control arrangement 49.
- the toner supply valve 46 releases the suction line 41 and closes the suction line 42 to the toner storage container 43.
- the suction cycle valve 19 opens, with the result that negative pressure on the toner delivery line 23 and thus abuts the suction line 41.
- Ambient air is sucked in via the opened air supply openings 58, which flows through the toner settling space 57 and thus transports the recyclable toner accumulated in the toner settling space 57 via the suction line 41 and the toner conveying line 23 to the toner box 16.
- the differential pressure sensor 76 reports a corresponding differential pressure on the particle sieve 53 and, if necessary, e.g. during a print pause, the toner recycling device 25 is put into the cleaning state (FIG. 5). In this case, the suction line 41 is closed by the drive arrangement 49 via the toner supply valve 46.
- the flap 59 of the air supply opening 58 of the toner settling space 57 and the flap 54 of the filter space 50 are also closed.
- the solenoid valve 56 opens the air supply opening 55 of the filter space 50, as a result of which air enters the air through the air supply opening 55 via the particle filter 53
- Cyclone filter 24 flows.
- the suction cycle valve 19 of the toner box 16 is closed.
- the air flow generated in this way transports the dirt particles 84 into the fine filter 32 of the vacuum generating device 31, where they collect.
- the recycle device 25 is in the normal state shown in FIG. 3. Recyclable toner is accumulated in the toner settling space 57. After a toner fill level which can be predetermined by the position and the response threshold setting of the toner sensor 61 is reached, the toner sensor 61 responds and reports a corresponding fill level signal to the control arrangement 49.
- the control arrangement 49 starts the gear motor 70 as a function of the fill level signal. 1 operation.
- the geared motor 70 now runs until the magnet 72 of the position sensor reaches the area of the Hall sensor H2.
- the flap 54 of the filter chamber 50 is closed. After reaching the Hall sender H2 5, the gear motor 70 stops.
- the Hall sender H2 simultaneously starts the drive motor 81 of the toner supply valve 46.
- the eccentric roller 82 is pivoted into the position shown in FIG. 4, in which it clamps off the suction line 42 and the Suction line 41 opens.
- the 0 Hall sensor H5 stops the eccentric roller 82 in this position.
- the geared motor 70 starts again and opens the flap 59 of the air supply opening 58 of the toner sales space 57.
- the geared motor 70 is stopped again.
- the Hall sensor H3 simultaneously triggers the suction process by actuating the suction clock valve 19 via the control arrangement 49 and switching on a time stage assigned to the control arrangement 49. During the suction process, the output signal of the toner sensor 61 drops again.
- the timer switches on the drive motor 81 of the toner supply valve 46 again after a presettable time of, for example, 2 seconds, as a result of which the eccentric roller 82 rotates again, the suction line 42 opens and the suction line 41 is disconnected. 5
- the output signal of the Hall sensor H4 ends the switchover and thus the suction process.
- the suction clock valve 19 is closed via the output signal of the Hall sensor H4 and the geared motor 70 is started again.
- the gear motor 70 stops again. This is the end of the
- a constant mixing ratio of the recovered toner and fresh toner in the toner box 16 is maintained by the automatic sequence of the toner recycling process. E.g. consumes a lot of toner because e.g. large areas are colored, the fill level sensor 22 signals a corresponding need to the control arrangement 49. There is then an increased supply of fresh toner from the storage container 43. Due to the increased consumption of toner, in turn, a lot of residual toner accumulates at the cleaning station, obtained from the recyclable toner in the recycle device 25 and the toner box 16 is fed. Since the supply takes place as a function of the fill level in the toner settling space 57, the supply cycle increases. The original mixture ratio is thus restored. In the steady state, this amounts to approximately 30% recovered toner and 70% fresh toner. Regardless of the amount of toner used, a constant print quality is guaranteed.
- the toner runs recyclevorg 'ang in the printing operation automatically in dependence from the toner level in the toner settling space 57 from.
- the toner recycling device 25 is designed as an exchangeable unit in the form of a recycling insert, as shown in FIG. 6.
- An insertion opening 85 is arranged in the pressure device below the cyclone filter 24 and serves for the interchangeable reception of both the recycling insert (recycling device 25) and a catch box 86.
- the catch box 86 is a collecting container for collecting the particles separated by the cyclone filter 24. If a certain fill level is reached in the catch box 86, this is removed and the particles of toner particles and dirt particles accumulated therein are thrown away.
- the insertion opening 85 contains guide rails 87 which are equipped with corresponding guide elements 88, e.g. interact in the form of hooks on the catch box 86 or the recycling insert 25.
- the insertion opening 85 At the bottom of the insertion opening 85 there are electrical connection sockets 89 for receiving the connection plug 75 of the recycling insert 25 or a connection plug 90 of the catch box 86.
- the control arrangement 49 recognizes via the connections made whether the inserted collection container is the catch box 86 or a recycling insert 25. The corresponding functions are switched depending on this.
- connections for the mouth area 60 and the electrical connections for the drive motor 70 of the recycling insert or the electrical connections 90 of the catch box 86 can be designed in such a way that an automatic contact by the insertion into the insertion opening 85 there would be an automatic connection between the mouth area 60 and the suction line 41.
- interlocking devices can be provided which only allow an exchange as a function of the operating state of the device and which, for example, ensure that the suction line 41 is closed during the exchange. Since the outlet area of the cyclone filter 24 is exposed when the inserts are exchanged, toner particles contained therein can fall into the insertion opening 85 and contaminate it.
- the inserts (catch box 86 or recycling insert 25) have a collecting trough 91 which, when exchanged, collects the residual particles contained in the cyclone filter 24. It is also possible to arrange a closure, for example in the form of a slide, in the area of the exit opening of the cyclone filter 24, which closes the cyclone filter 24 as needed during the exchange. Furthermore, it is possible to arrange this slide displaceably in the insertion opening 85 via guide rails and to provide it with fastening means for exchangeably fastening the inserts, be it the catch box 86 or the recycling insert 25.
- the toner particles are triboelectrically charged in the developer station in order to color the latent toner image on the photoconductor. So this triboelectric charging or other
- the line system receiving the toner consists of electrically conductive material, e.g. made of metal or conductive plastic.
- the power system is grounded to discharge any charges.
- the inner surfaces of the line system that come into contact with the toner can be coated with a conductive layer or there are corresponding earth conductor tracks on the inner surface of the line system.
- a cyclone filter is arranged as the particle separator 24.
- the cyclone filter it is also possible to arrange other particle separators, for example sieves or the like.
- the flaps in the toner recycling device 25 it is possible to put the flaps in the toner recycling device 25 to be replaced by corresponding other closures such as sliding elements or closure valves.
- this can be replaced by corresponding functionally equivalent valves which work with slides or other mechanical closure devices.
- Hl H2, H3 Hall sensors, position sensors
- H4 position sensors H4, H5 position sensors, Hall sensors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Sustainable Development (AREA)
- Cleaning In Electrography (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93922939A EP0665966B1 (de) | 1992-10-22 | 1993-10-12 | Pneumatische tonerfördereinrichtung für ein elektrografisches druck- oder kopiergerät |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP92118101 | 1992-10-22 | ||
EP92118101 | 1992-10-22 | ||
EP93922939A EP0665966B1 (de) | 1992-10-22 | 1993-10-12 | Pneumatische tonerfördereinrichtung für ein elektrografisches druck- oder kopiergerät |
PCT/EP1993/002805 WO1994009412A1 (de) | 1992-10-22 | 1993-10-12 | Pneumatische tonerfördereinrichtung für ein electrografisches druck- oder kopiergerät |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0665966A1 true EP0665966A1 (de) | 1995-08-09 |
EP0665966B1 EP0665966B1 (de) | 1996-05-08 |
Family
ID=8210163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93922939A Expired - Lifetime EP0665966B1 (de) | 1992-10-22 | 1993-10-12 | Pneumatische tonerfördereinrichtung für ein elektrografisches druck- oder kopiergerät |
Country Status (5)
Country | Link |
---|---|
US (1) | US5521690A (de) |
EP (1) | EP0665966B1 (de) |
JP (1) | JPH08502369A (de) |
DE (1) | DE59302533D1 (de) |
WO (1) | WO1994009412A1 (de) |
Families Citing this family (27)
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US5600411A (en) * | 1995-06-07 | 1997-02-04 | Xerox Corporation | Multi layer toner filtration trap |
EP0858619B1 (de) * | 1995-10-31 | 1999-04-07 | Océ Printing Systems GmbH | Tonerzuführeinrichtung für eine entwicklerstation eines druck- oder kopiergerätes |
JP3525019B2 (ja) * | 1996-02-19 | 2004-05-10 | 株式会社リコー | 粉体ポンプ付き画像形成装置 |
US5799227A (en) * | 1996-06-06 | 1998-08-25 | Moore Business Forms, Inc. | Non-magnetic toner dynamic recycling |
US5848326A (en) * | 1996-10-18 | 1998-12-08 | Ricoh Company, Ltd. | Toner conveying method and device for an image forming apparatus |
DE19652860C2 (de) * | 1996-12-18 | 2002-03-21 | Oce Printing Systems Gmbh | Vorrichtung zum Fördern von Tonermaterial aus einem Vorratsbehälter |
US6112046A (en) * | 1997-06-20 | 2000-08-29 | Ricoh Company, Ltd. | Image forming apparatus having recycling of residual toner |
US6167211A (en) * | 1998-08-25 | 2000-12-26 | Minolta Co., Ltd. | Image forming apparatus having a function for recycling collected toner and control method thereof |
US6408153B1 (en) * | 2000-11-30 | 2002-06-18 | Xerox Corporation | Method and apparatus for ultrasonic screen cleaning in a particulate delivery system |
US6453148B1 (en) * | 2000-12-07 | 2002-09-17 | Heidelberger Druckmaschinen Ag | Apparatus and process for detecting leaks in an electrographic cleaning system |
US6480685B2 (en) * | 2000-12-11 | 2002-11-12 | Heidelberger Druckmaschinen Ag | System and method for quietly and efficiently cleaning and removing particles from a copier/printer machine |
JP2004271688A (ja) * | 2003-03-06 | 2004-09-30 | Konica Minolta Holdings Inc | 画像形成方法 |
JP3985753B2 (ja) * | 2003-08-19 | 2007-10-03 | コニカミノルタビジネステクノロジーズ株式会社 | 画像形成装置 |
US7450880B1 (en) * | 2006-03-20 | 2008-11-11 | Anew Green, Inc | Waste toner recycling |
WO2007109842A1 (en) * | 2006-03-24 | 2007-10-04 | Gcc Ip Pty Ltd | A printing system and a printer cartridge incorporating same |
JP4298733B2 (ja) * | 2006-09-25 | 2009-07-22 | シャープ株式会社 | 現像剤回収装置およびそれを備える画像形成装置 |
US7706726B2 (en) * | 2006-12-13 | 2010-04-27 | Xerox Corporation | Apparatus and process to reclaim toner from a toner/carrier mixture |
DE102007010276B4 (de) * | 2007-03-02 | 2010-06-10 | OCé PRINTING SYSTEMS GMBH | Einrichtung und Verfahren zum Einfärben von latenten Bildern eines Zwischenträgers unter Rückführung von Tonerteilchen zu einer Tonerbox |
JP2008299217A (ja) * | 2007-06-01 | 2008-12-11 | Ricoh Co Ltd | 現像装置・画像形成装置 |
DE102007040403A1 (de) | 2007-08-27 | 2009-03-05 | OCé PRINTING SYSTEMS GMBH | Einrichtung und Verfahren zum Drucken von Bildmustern auf einem Aufzeichnungsträger |
US7813657B2 (en) * | 2008-02-08 | 2010-10-12 | Xerox Corporation | Toner concentration field measurement tool |
US8052781B2 (en) * | 2008-04-11 | 2011-11-08 | Xerox Corporation | Integrated waste toner and ozone collection system |
US8525045B2 (en) * | 2008-06-26 | 2013-09-03 | U-Tec Corporation | Faraday cage and device having same |
JP5239555B2 (ja) * | 2008-06-30 | 2013-07-17 | 株式会社リコー | 現像装置および画像形成装置 |
JP5413130B2 (ja) * | 2009-11-02 | 2014-02-12 | コニカミノルタ株式会社 | 着脱可能なトナー捕集ユニットを有する画像形成装置 |
JP5857783B2 (ja) * | 2012-02-17 | 2016-02-10 | 株式会社リコー | ノズル、画像形成装置、及び粉体導出方法 |
JP2015041001A (ja) * | 2013-08-22 | 2015-03-02 | 株式会社リコー | 現像剤搬送装置、現像装置及び画像形成装置 |
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JPS59143180A (ja) * | 1983-02-04 | 1984-08-16 | Fuji Xerox Co Ltd | 現像剤回収装置 |
JPS61100783A (ja) * | 1984-10-23 | 1986-05-19 | Nippon Donarudoson Kk | 電子写真複写機におけるサイクロン分離器 |
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US3439650A (en) * | 1965-07-12 | 1969-04-22 | Borg Warner | Information transfer and ink particle refining system |
US3703957A (en) * | 1968-03-06 | 1972-11-28 | Kenneth W Swanson | Pneumatic separator, filter and particle conveying system |
US3793986A (en) * | 1971-06-11 | 1974-02-26 | S Latone | Toner reclaiming system for electrostatic printing machines |
US3894514A (en) * | 1973-12-20 | 1975-07-15 | Ibm | Toner recovery system |
US4260073A (en) * | 1978-08-23 | 1981-04-07 | International Business Machines Corporation | Virgin toner and used toner supply apparatus and method |
JPS5829480Y2 (ja) * | 1979-01-29 | 1983-06-28 | 株式会社リコー | 電子写真複写機のトナ−回収装置 |
EP0221281B1 (de) * | 1985-10-09 | 1988-11-30 | Siemens Aktiengesellschaft | Vorrichtung zum Entfernen eines, eine magnetische Komponente enthaltenden Entwicklergemisches aus einer Entwicklerstation eines nichtmechanischen Druck- oder Kopiergerätes |
US4833501A (en) * | 1986-03-14 | 1989-05-23 | Siemens Aktiengesellschaft | Apparatus and method for filling a toner reservoir by suction |
US4724459A (en) * | 1986-12-29 | 1988-02-09 | Eastman Kodak Company | Apparatus for selectively recycling used toner or delivering such toner to a container |
JP2953001B2 (ja) * | 1990-08-28 | 1999-09-27 | ミノルタ株式会社 | トナー供給装置 |
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1993
- 1993-10-12 EP EP93922939A patent/EP0665966B1/de not_active Expired - Lifetime
- 1993-10-12 JP JP6509613A patent/JPH08502369A/ja active Pending
- 1993-10-12 US US08/424,347 patent/US5521690A/en not_active Expired - Lifetime
- 1993-10-12 DE DE59302533T patent/DE59302533D1/de not_active Expired - Lifetime
- 1993-10-12 WO PCT/EP1993/002805 patent/WO1994009412A1/de active IP Right Grant
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JPS59143180A (ja) * | 1983-02-04 | 1984-08-16 | Fuji Xerox Co Ltd | 現像剤回収装置 |
JPS61100783A (ja) * | 1984-10-23 | 1986-05-19 | Nippon Donarudoson Kk | 電子写真複写機におけるサイクロン分離器 |
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Title |
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PATENT ABSTRACTS OF JAPAN vol. 10, no. 282 (P-500)(2338) 25. September 1986 ; & JP-A-61 100 783 * |
PATENT ABSTRACTS OF JAPAN vol. 8, no. 278 (P-322)(1715) 19. Dezember 1984 ; & JP-A-59 143 180 * |
See also references of WO9409412A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1994009412A1 (de) | 1994-04-28 |
EP0665966B1 (de) | 1996-05-08 |
JPH08502369A (ja) | 1996-03-12 |
US5521690A (en) | 1996-05-28 |
DE59302533D1 (de) | 1996-06-13 |
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