EP0403469A1 - Device for dosed transfer of toner from a reservoir to the development station of a printer or photocopy machine. - Google Patents
Device for dosed transfer of toner from a reservoir to the development station of a printer or photocopy machine.Info
- Publication number
- EP0403469A1 EP0403469A1 EP88902090A EP88902090A EP0403469A1 EP 0403469 A1 EP0403469 A1 EP 0403469A1 EP 88902090 A EP88902090 A EP 88902090A EP 88902090 A EP88902090 A EP 88902090A EP 0403469 A1 EP0403469 A1 EP 0403469A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- toner
- metering
- spiral
- conveyor spiral
- conveyor
- 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
- 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
-
- 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
- the invention relates to a device for the metered filling of toner from a reservoir into the developer station of a non-mechanical printing or copying machine.
- charge images on a charge image carrier are, for. B. generated a photoconductor drum and then colored with a toner in a developer station.
- the toner images are subsequently printed on normal paper and thermally or chemically fixed there.
- a two-component developer is used for development, which consists of ferromagnetic carrier particles and toner particles.
- the developer mixture is e.g. B. by means of a magnetic brush arrangement on the charge image carrier (photoconductor drum) on which the toner particles, caused by electrostatic forces, stick.
- the mixture flowing back is enriched with new toner from the toner storage container before it flows back into the circuit of the mixture carpet in the developer station.
- toner In order to achieve a uniform coloring of the charge image via the developer station, toner must be supplied to the developer station in an evenly metered manner over the entire width of the developer station.
- the mechanical load on the toner When the toner is metered into the developer mixture, the mechanical load on the toner must be minimal in order to be able to work without problems even in the limit temperature range of the toner and to prevent the toner from clumping.
- the use of a screw shaft can cause the toner to roll in the delivery tube. This means that the toner takes on the shape of the conveyor roller and clumps. The toner is also subject to a relatively high mechanical stress.
- Another disadvantage of a lateral supply of toner to the developer station is that when the toner requirement is high, the developer mixture becomes leaner at the opposite end of the developer station.
- the object of the invention is to design a device of the type mentioned in such a way that the toner is metered uniformly and without lumps over the entire printing width without great mechanical stress and independently of the toner supply in the storage container into the developer station.
- the conveyor spiral extends over the metering roller and into the storage container and transports the toner from the storage container evenly over the metering roller.
- the metering roller and feed spiral are coupled in terms of drive.
- the feed spiral moves much more slowly than the metering shaft.
- the delivery rate is independent of the fill level in the toner reservoir. This makes it possible to use large storage containers into which toner can be refilled without interruption in printing.
- the delivery rate can be varied continuously from almost 0 to several kilograms per hour by clocking the drive.
- Embodiments of the invention are illustrated in the drawings and are described in more detail below, for example. Show it
- FIG. 1 shows a schematic representation of the metering device for an electrophotographic printing device in longitudinal section
- FIG. 2 shows a schematic illustration of the metering device in cross section.
- a printing device working on the principle of electrophotography contains a photoconductor drum 10 as a charge carrier.
- the charge image located on the photoconductor drum is colored with the aid of a developer station 11 with a two-component developer mixture consisting of carrier particles and toner particles.
- the developer station 11 contains a magnetic roller 12 for coloring the photoconductor drum as an application roller and two co-rotating mixing rollers 13 (arrow direction) for mixing the mixture.
- an emptying roller 14 is arranged on the bottom of the developer station 11, by means of which the used developer mixture can be removed from the developer station from time to time.
- toner particles are used to color the charge images.
- These toner particles referred to as "toner” for short, must be fed to the developer station 11 in a metered manner as a function of the printing capacity from a toner reservoir 15 via a metering device.
- a metering device 16 is a metering roller 16 made of metal or foam or other soft plastic that extends over the entire printing width and thus over the width of the developer station and its mixing rollers 13 hen.
- the metering roller 16 is rotatably arranged between the walls 17 of the outlet area of the storage container 11. It completely seals the exit area of the toner supply container 15.
- toner 18 is transported in a metered manner between the walls 17 and the roller 16 and fed to the developer station 11.
- the metering roller 16 is rotatably mounted in the walls 17 of the toner reservoir or the developer station and is driven by a motor 19.
- a conveyor spiral 20 is arranged at a close distance above the metering roller 16 to supply the toner to the metering roller.
- the conveyor spiral consists of a helical spring, which is attached with its ends 21 to a drive shaft 22.
- the drive shaft 22 is in turn mounted in the walls of the toner reservoir 15 and is coupled to the motor 19 of the metering roller via a gear 23.
- the feed spiral is arranged in a feed pipe 24 which is open on one side in the area of the metering roller.
- the conveyor spiral is located at a close distance directly above the metering roller and extends parallel to the metering roller up to the actual toner supply container.
- the toner supply container 15 itself has two counter-rotating scraper bars 25 which slide along the walls of the toner supply container 15 and thus prevent the toner from becoming stuck to the walls of the toner supply container.
- the scraper bars 25 are driven by the conveyor spiral 20 via a belt drive 26.
- the toner supply container 15 has a filling opening 27, via which toner from transportable containers is poured into the toner supply container 15.
- the toner poured into the toner reservoir 15 is distributed within the conveyor spiral or the conveyor tube 24 in such a way that a toner level of 1/3 to 1/2 tube diameter of the conveyor tube 24 is established above the metering roller.
- This toner level depends on the metering power of the metering shaft and this in turn on the transmission ratio of the gear 23 between metering roller 16 and conveyor spiral 20. In the exemplary embodiment shown, this ratio is 27: 1, which means that the metering roller has a 27 times higher speed than that Conveyor spiral 20.
- the gear 23 is designed as a crank mechanism with a freewheel on the conveyor spiral. However, any other gearbox with the appropriate gear ratio can also be used.
- the conveyor spiral 20 consists of a wire with a diameter of 4 mm. It has an outside diameter of 68 mm and a pitch of 34 mm and is arranged in a conveyor pipe 24 with an inside diameter of 70 mm. Conveyor spiral and foam dosing roller with a diameter of 24 mm have a distance of 1 to 2 mm.
- a metering roller made of metal with notches, recesses or the like instead of a foam or other soft plastic metering roller.
- the delivery rate of the metering device is constant over the angle of rotation of the conveyor spiral 20 and depends solely on the speed of the conveyor spiral or the ratio of the speeds and the dimensioning between the metering roller and the conveyor spiral.
- This toner level is between 1/3 and 1/2 tube diameter of the delivery tube 24 should be independent of the level of the toner in the actual toner supply container 15.
- the delivery rate is therefore independent of the level of the toner in the toner supply container.
- Large storage containers can be used that can be refilled with toner without interruption in printing.
- the amount of toner supplied to the developer station can be varied depending on the printing output by changing the speed of the drive of the conveyor spiral and metering roller.
- the conveyor spiral 20 slips over the metering roller 16 at a tight distance of 1 to 2 mm.
- no voids in the toner, so-called vaults can form above the metering roller, since these vaults are constantly cleared by the conveyor spiral.
- a single metering roller 16 is arranged in the outlet area of the toner supply container 15.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
Un dispositif de remplissage dosé de la station de développement (11) d'une imprimante électrophotographique avec du toner contenu dans un réservoir (15) comprend un cylindre de dosage agencé à la sortie du réservoir de toner (15). Une spirale d'alimentation creuse (20) agencée dans un tube d'alimentation (24) au-dessus du cylindre de dosage (16) s'étend parallèlement à celui-ci jusqu'à l'intérieur du réservoir de toner. Selon le dosage voulu, la spirale d'alimentation (20) et le cylindre de dosage (16) présentent un entraînement couplé.A device for metered filling of the development station (11) of an electrophotographic printer with toner contained in a tank (15) comprises a metering cylinder arranged at the outlet of the toner tank (15). A hollow feed spiral (20) arranged in a feed tube (24) above the metering cylinder (16) extends parallel thereto into the interior of the toner reservoir. Depending on the desired dosage, the feed spiral (20) and the dosage cylinder (16) have a coupled drive.
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE1988/000110 WO1989008284A1 (en) | 1988-03-02 | 1988-03-02 | Device for dosed transfer of toner from a reservoir to the development station of a printer or photocopy machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0403469A1 true EP0403469A1 (en) | 1990-12-27 |
EP0403469B1 EP0403469B1 (en) | 1991-09-18 |
Family
ID=6819339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88902090A Expired - Lifetime EP0403469B1 (en) | 1988-03-02 | 1988-03-02 | Device for dosed transfer of toner from a reservoir to the development station of a printer or photocopy machine |
Country Status (5)
Country | Link |
---|---|
US (1) | US5139176A (en) |
EP (1) | EP0403469B1 (en) |
JP (1) | JPH03503088A (en) |
DE (1) | DE3865022D1 (en) |
WO (1) | WO1989008284A1 (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2827137B2 (en) * | 1989-12-05 | 1998-11-18 | 株式会社リコー | Cleaner toner magazine and electrophotographic recording device |
JP3000493B2 (en) * | 1991-07-15 | 2000-01-17 | 株式会社リコー | Cleaner Toner Magazine |
JPH05127522A (en) * | 1991-11-05 | 1993-05-25 | Mita Ind Co Ltd | Toner supplying device |
JPH0635317A (en) * | 1992-07-16 | 1994-02-10 | Fuji Xerox Co Ltd | One-component developing device for electrophotograph |
US5289955A (en) * | 1992-09-09 | 1994-03-01 | Xerox Corporation | Tri-level highlight color replenisher |
US5264901A (en) * | 1992-12-28 | 1993-11-23 | Future Communications Corporation | Toner cartridge seal |
JP2805016B2 (en) * | 1994-11-29 | 1998-09-30 | カゴメ株式会社 | Method and apparatus for producing sauteed vegetables and roasted flavor |
US5575408A (en) * | 1995-04-27 | 1996-11-19 | Xerox Corporation | Image developer material agitation system with non-binding mixing coil agitator |
EP0960357B1 (en) * | 1997-02-12 | 2002-11-06 | Océ Printing Systems GmbH | Developing station with cross conveyance |
US5996855A (en) * | 1998-02-27 | 1999-12-07 | Material Sciences Corporation | Cross-feed auger and method |
US6609820B2 (en) * | 2001-12-20 | 2003-08-26 | Xerox Corporation | Internal spring member agitating mechanism for agitating materials within sealed containers |
ITFR20040012A1 (en) * | 2004-07-27 | 2004-10-27 | E O S Di Turri Alessandro & Co | TONER DOSING MACHINE THAT DOES NOT REQUIRE CLEANING AT THE CHANGE OF TONER |
CN1932672B (en) * | 2005-09-15 | 2011-12-21 | 株式会社理光 | Image forming apparatus and developer supplier capable of supplying developer at increased speed |
US7929870B2 (en) * | 2007-07-19 | 2011-04-19 | Fuji Xerox Co., Ltd. | Image forming apparatus with a toner dispensing control unit |
KR100913143B1 (en) * | 2008-02-21 | 2009-08-19 | 삼성전자주식회사 | Photosensitive body unit, developer storage unit and image forming apparatus |
US8150297B2 (en) * | 2009-04-16 | 2012-04-03 | Lexmark International, Inc. | Geneva drive and locking mechanism therefor in a toner metering mechanism for an image forming apparatus |
US8059993B2 (en) * | 2009-04-16 | 2011-11-15 | Lexmark International, Inc. | Rotating toner cleaning member for a toner delivery device in an image forming apparatus |
KR102541857B1 (en) * | 2019-01-16 | 2023-06-09 | 휴렛-팩커드 디벨롭먼트 컴퍼니, 엘.피. | Developer cartridge with spring auger |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3310205A (en) * | 1964-03-09 | 1967-03-21 | Cra Vac Corp | Feed mechanism for an apparatus for opposing offset in printing |
DE2644097A1 (en) * | 1976-09-30 | 1978-04-06 | Agfa Gevaert Ag | Toner dosing control for photocopier - has charged roller in slot of hopper with scraper to release stream of toner |
DE2831805C2 (en) * | 1978-07-19 | 1982-10-28 | Siemens AG, 1000 Berlin und 8000 München | Storage container for powdery toner |
US4305529A (en) * | 1979-12-17 | 1981-12-15 | Xerox Corporation | Particle dispensing system |
JPS56112924A (en) * | 1980-02-13 | 1981-09-05 | Matsushita Electric Works Ltd | Epoxy resin composition |
DE3005833C2 (en) * | 1980-02-16 | 1982-05-13 | Agfa-Gevaert Ag, 5090 Leverkusen | Magnetic developing device for an electrographic copier |
CA1217045A (en) * | 1981-07-23 | 1987-01-27 | Raymond E. Poehlein | Particle dispensing system |
US4682874A (en) * | 1981-11-19 | 1987-07-28 | Xerox Corporation | Particle level indicator |
DE3225870A1 (en) * | 1982-07-10 | 1984-01-12 | Agfa-Gevaert Ag, 5090 Leverkusen | Toner dosing device for electrophotographic copiers |
JPS60221778A (en) * | 1984-04-19 | 1985-11-06 | Matsushita Electric Ind Co Ltd | Toner replenishing device |
JPH0656530B2 (en) * | 1984-05-11 | 1994-07-27 | 富士ゼロックス株式会社 | Toner supply device |
JPS6199176A (en) * | 1984-10-22 | 1986-05-17 | Toshiba Corp | Developer feeder |
JPS6249381A (en) * | 1985-08-29 | 1987-03-04 | Toshiba Corp | Toner cartridge in electronic copying machine |
DE3620365A1 (en) * | 1986-06-18 | 1987-12-23 | Siemens Ag | Supply container for pulverulent toner |
-
1988
- 1988-03-02 JP JP88501966A patent/JPH03503088A/en active Pending
- 1988-03-02 DE DE8888902090T patent/DE3865022D1/en not_active Expired - Lifetime
- 1988-03-02 EP EP88902090A patent/EP0403469B1/en not_active Expired - Lifetime
- 1988-03-02 WO PCT/DE1988/000110 patent/WO1989008284A1/en active IP Right Grant
- 1988-03-02 US US07/566,377 patent/US5139176A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO8908284A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0403469B1 (en) | 1991-09-18 |
JPH03503088A (en) | 1991-07-11 |
US5139176A (en) | 1992-08-18 |
WO1989008284A1 (en) | 1989-09-08 |
DE3865022D1 (en) | 1991-10-24 |
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