EP0308431B1 - Device enabling the clean replacement of a toner container in a toner transfer system of a non-mechanical printer or copier - Google Patents

Device enabling the clean replacement of a toner container in a toner transfer system of a non-mechanical printer or copier Download PDF

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Publication number
EP0308431B1
EP0308431B1 EP19870906162 EP87906162A EP0308431B1 EP 0308431 B1 EP0308431 B1 EP 0308431B1 EP 19870906162 EP19870906162 EP 19870906162 EP 87906162 A EP87906162 A EP 87906162A EP 0308431 B1 EP0308431 B1 EP 0308431B1
Authority
EP
European Patent Office
Prior art keywords
toner
toner container
container
adapter
suction tube
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.)
Expired - Lifetime
Application number
EP19870906162
Other languages
German (de)
French (fr)
Other versions
EP0308431A1 (en
Inventor
Erich KRÄHN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
Priority to DE19863633593 priority Critical patent/DE3633593A1/en
Priority to DE3633593 priority
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0308431A1 publication Critical patent/EP0308431A1/en
Application granted granted Critical
Publication of EP0308431B1 publication Critical patent/EP0308431B1/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6310919&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0308431(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0877Arrangements for metering and dispensing developer from a developer cartridge into the development unit
    • G03G15/0879Arrangements 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
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0865Arrangements for supplying new developer
    • G03G15/0867Arrangements for supplying new developer cylindrical developer cartridges, e.g. toner bottles for the developer replenishing opening
    • G03G15/087Developer cartridges having a longitudinal rotational axis, around which at least one part is rotated when mounting or using the cartridge
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00Apparatus for electrophotographic processes
    • G03G2215/06Developing structures, details
    • G03G2215/066Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material
    • G03G2215/0663Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material having a longitudinal rotational axis, around which at least one part is rotated when mounting or using the cartridge
    • G03G2215/0678Bottle shaped container having a bottle neck for toner discharge
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00Apparatus for electrophotographic processes
    • G03G2215/06Developing structures, details
    • G03G2215/066Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material
    • G03G2215/069Toner cartridge or other attachable and detachable container for supplying developer material to replace the used material using a sealing member to be ruptured or cut
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S222/00Dispensing
    • Y10S222/01Xerography

Abstract

In a transfer system (19) located in a printer, a suction spout communicating via a pipe with the development unit is arranged in a vertically movable manner inside a protective conduit (28) impervious to the toner. The transfer system comprises at its lower end an adapter serving for connection of the toner container (10). During replacement, the new container (10) is made to pivot via a support system (32) onto the adapter and connected with the latter. A cutting system (31) associated with the adapter then pierces a sealing film of said toner container (10). For emptying, the suction spout is immersed vertically in the toner container (10), the bottom of which has a funnel-shaped configuration serving as a toner storage area.

Description

  • The invention relates to a device according to the preamble of patent claim 1.
  • In copying technology and in modern high-speed data printers that work on the principle of electrophotography, charge images are recorded on a recording medium e.g. B. directly on an intermediate carrier (photoconductor drum) or directly on special paper and then colored with a black powder (toner) in a developer station. When an intermediate carrier is used, this toner image is then transferred to normal paper and fixed thereon.
  • Typically, a two-component developer is used for development, which consists of ferromagnetic carrier particles and the toner particles carrying the color. The developer is guided past the charge image on the intermediate carrier by means of a magnetic brush arrangement, to which the toner sticks due to electrostatic forces.
  • An electrophotographic copier that develops charge images according to the specified principle is, for. B. known from DE-AS 21 66 667.
  • Due to the coloring of the charge images on the intermediate carrier, the toner concentration in the developer mixture of the developer station decreases continuously. It is therefore necessary to continuously add new toner to the developer mixture. Since the toner consumption per unit of time is very high in the case of fast copying machines and high-performance data printers, a spacious toner reservoir is used in such machines in order to avoid downtimes by refilling the toner. When this toner reservoir is empty, the toner, which is usually supplied in handy containers, is filled into the reservoir. It is important to fill the toner from the container into the storage container in such a way that no toner is spilled and the environment is thereby contaminated.
  • From DE-PS 32 24 296 a device for filling and sieving toner from a container into a toner reservoir is known. In this case, the toner located in a transport container, namely a toner bottle, is fed to a storage container in that the toner bottle is slipped into a filling opening of the storage container. In the area of the filling opening there is a sieve basket, which is closed off from the storage container by a sieve and which is connected to an electrical vibrating device which can be triggered if necessary. The vibrating device is triggered by opening the cover closing the filler opening.
  • With such filling devices, there is now a risk that the toner will spill out of the toner bottle during manual refilling. In addition, since the toner is only supplied to the toner supply container at a certain point, special distribution devices in the toner supply container are necessary in order to ensure a uniform supply of the toner to the developer station.
  • It is also from the Xerox Disclosure Journal, Vol. 1, No. 8, August 1976, p. 47, known to supply toner to the developer station from a remotely located reservoir by blowing air through the reservoir. This air then transports the toner to the developer station.
  • JP-A-61-59 465 describes a toner supply device in which toner is drawn off from a toner container with the aid of a suction device and a line system and is fed to the storage container of a developer station.
  • Furthermore, it is known from EP-A-8 270 to suck off powdery material from a container with the aid of a suction nozzle, which consists of an inner tube and an outer tube.
  • The object of the invention is to design a toner container of the type mentioned at the outset in such a way that the toner can be supplied in a simple manner to non-mechanical printing or copying devices without the toner escaping contaminating the surroundings.
  • This object is achieved in a device of the type mentioned at the outset according to the characterizing part of the first claim.
  • Advantageous embodiments of the invention are characterized in the subclaims.
  • Because the toner is removed from the toner container with the aid of a suction nozzle, which is arranged within a protective sleeve, which is connected via an adapter to a filling and emptying opening of the toner container, no toner dust can contaminate the surroundings.
  • A safety device ensures that the proboscis can only dip into the toner container for suction when there is a dust-tight connection between the filling and emptying opening of the toner container and the adapter. The same safety device also prevents the lock from loosening when the proboscis is immersed.
  • The toner containers are advantageously delivered with a sealed filling and emptying opening. The adapter is designed so that only when the toner container is connected to the adapter does the adapter pierce the sealing film via a cutting device. Spilling of toner when inserting the toner container into the corresponding receiving device in the printing device is therefore not possible.
  • In an advantageous embodiment of the invention, changing the toner container is facilitated in that the container receiving the toner container is designed to be pivotable out of the printer.
  • The special shape of the toner container with funnel-shaped bottom enables the complete Empty the toner container using the vertically movable suction nozzle.
  • The suction nozzle, which has feed openings for toner at its tip, consists of an inner tube and an outer tube that completely surrounds the inner tube. The air drawn in via the air intake openings of the intake pipe first flows through the outer pipe and then through the inner pipe. The toner is entrained into the inner tube by the air flow via toner feed openings in the suction area of the outer tube.
  • This allows the toner container to be completely emptied without any special ventilation openings.
  • Embodiments of the invention are shown in the drawings and are described in more detail below, for example. Show it
    • Fig. 1 is a schematic representation of the toner container
    • Fig. 2 is a schematic sectional view of the toner container
    • Fig. 3 is a schematic representation of the toner supply area of a printing device with inserted filled toner bottle before connection to the suction device
    • Fig. 4 is a schematic sectional view of the toner supply area of the printing device, partly in a sectional view with an almost completely empty toner container
    • Fig. 5 is a sectional view of the securing mechanism for the proboscis in the secured state
    • Fig. 6 is a sectional view of the locking mechanism for the proboscis in the unlocked state
    • Fig. 7 is a schematic sectional view of the adapter area of the suction device and
    • Fig. 8 is a schematic representation of the emptying area of the printing device with the inserted toner container as a collecting container.
  • A printing device (not shown here) that works according to the electrophotographic principle contains a toner supply area (FIG. 3) for receiving a toner container 10 made of plastic with an associated suction device via which the powdered toner 11 is fed to a developer station (not shown here) of the printing device. Furthermore, an emptying area (FIG. 8) is provided in the printing device, in which an empty toner container 10 can be attached as a collecting container for the developer mixture when emptying the developer station.
  • In the developer station of the printing device, a charge image is colored with toner in a known manner using a two-component developer mixture of toner and carrier particles. On the one hand, this developer mixture has to be refreshed from time to time by adding toner, on the other hand, after a long period of operation, it is necessary to replace the entire developer mixture.
  • The toner container 10 is designed to hold approximately 3 kg of toner powder. Its container walls form flat surfaces, a surface 12 being designed as a standing surface. The upper wall surfaces of the toner container form a cuboid with parallel surfaces, which allows space-saving stacking in the toner container. A handle 13 is integrated into the wall surfaces in such a way that, on the one hand, the toner container 10 can be carried easily, and, on the other hand, it does not hinder the stacking of several toner containers. Adjacent to the base 12, the container walls 12/5 and 12/6 together with the container wall 12/1 and the base 12 form a funnel-shaped collecting area for the toner. Opposite this collecting area is a filling and removal opening 14 which can be closed with a lid 16 with a foam insert 9, which is secured captively via a tab 15.
  • After filling with toner powder 11, the opening itself is sealed with an aluminum foil 17.
  • The collecting area and filling and emptying opening 14 are arranged relative to one another in such a way that, according to FIG. 1, the proboscis 18 inserted into the toner container from above penetrates as far as the collecting area after appropriate suction of the toner powder.
  • In this characteristic removal position shown in FIG. 1, the collecting area forms the lowest point of the toner container. In relation to the vertical axis A of the installation or removal position of the toner container, the walls enclose an angle B which is less than 45 °.
  • 1, an incline relative to the vertical axis A, which prevents the toner from sticking to the walls of the container when it is removed with the suction nozzle 18 in connection with a knocking / vibrating device. In the collection area formed by the walls 12/5 and 12/6 or 12 and 12/1, which forms the deepest point of the container, the toner collects during emptying and can be completely suctioned off there.
  • In order to be able to reliably feed the toner from the toner container 10 to the developer station without contaminating the surroundings, the toner supply area has a suction device for the toner and a corresponding holding device for the toner container 10.
  • The suction device consists of the suction nozzle 18 which is vertically displaceably arranged between guide rods 19 and which is connected via a flexible suction pipe 20 to a fan of the printer, not shown here. The blower sucks the toner out of the toner container 10 via the suction nozzle and deposits it in the developer station.
  • 4, the suction nozzle 18 contains an inner tube 21 cut wedge-shaped at its lower end, which is connected to the flexible suction tube 20 and has suction openings 22 for the toner. The inner tube 21 is completely surrounded by an outer tube 23 which is arranged at a distance and which, on the one hand, has an air intake opening to the surroundings at its upper part G opening 24, on the other hand at its tip in the suction area toner inlet openings 25. The distance and the guidance of the inner tube 21 is effected by means of spacer elements, not shown here, which, for. B. can consist of three evenly distributed foam strips.
  • In order to keep clumped toner residues away from the feed to the printer station, the toner inlet openings 25 can be covered by a toner screen covering the suction area of the suction nozzle.
  • The suction nozzle itself is arranged so that it can be moved vertically by means of a handle 26. For this purpose, carrier elements 27 are provided which guide the suction nozzle between guide rods 19. In order to protect the suction proboscis and to prevent toner from escaping into the surroundings, the suction proboscis 18 is surrounded by a sleeve in the form of a rubber bellows 28. This sleeve 28 is attached at the top and bottom of the carrier elements 27, the lower carrier element 27 being designed as an adapter for connecting the toner container 10 and as a lower guide for the suction nozzle 18. The adapter is arranged in a stationary manner and contains an annular wiper ring 29 (FIG. 7) for wiping off toner residues from the suction nozzle 18. Furthermore, a safety device designed according to FIGS. 5 and 6 is provided, which will be explained later. The actual connection part for the toner container consists of a foam sealing ring 30 for the filling and emptying opening and a cutting ring 31 which has the task of cutting through the film 17 when the toner container 10 is inserted.
  • Furthermore, the receiving device contains a receiving container 32 for the toner container, which has two wall surfaces, between which holding rods 33 are arranged for the toner container. The receptacle 32 is pivotally attached to a rotary hinge 34, with which the receptacle 32 can be pivoted out of the interior of the receiving area (device compartment) of the printer.
  • The receptacle 32 can also be pivoted vertically about the fastening axis 35 on the rotary hinge 34 and has a tensioning mechanism 36 which interacts with a corresponding hook 37 on the adapter of the suction devices.
  • 5 and 6 there is a latch 38 in a side wall of the receptacle 32, which engages with a corresponding pin 39 of a spring rod 40 mounted resiliently in the adapter. The lifting rod 40 mounted in the adapter is connected via a toggle lever 41 to a holding pin 42 attached to it. A spring 43 envelops the lifting rod 40.
  • The function of the device described is now as follows: The toner container 10 with foil seal 17 and opened lid 16 is pivoted in the receptacle 32 via the rotary hinge 34 into the interior of the receiving area of the printer. A clamping mechanism 36 brings the toner container 10 arranged in the receiving container 32 into engagement with the adapter by rotation about the fastening axis 35. However, before the toner bottle neck 44 engages in the foam sealing ring 30 of the adapter, an approximately 340 ° circular sector is cut into the foil seal by the cutting ring 31.
  • If the toner bottle neck 44 engages in the foam sealing ring 30, the suction nozzle 18 is released by the securing mechanism of FIGS. 5 and 6. The suction nozzle 18 is fixed by a retaining pin 42 which is connected to the toggle lever mechanism 41. As a result of the pivoting movement of the receptacle 32 about the fastening axis 35, the pin 39 on the lifting rod 40 engages with the catch 38 arranged on the receptacle with the associated ramp. The lifting rod 40 is raised and the holding pin 42 moved by the toggle lever 41 releases the suction nozzle 18. Due to its own weight, the suction nozzle 18 penetrates into the toner container 10 and in doing so presses the slit film seal 17, which only hangs on one tab, into the interior of the bottle, where the actual toner delivery can now begin. A pivoting of the receptacle 32 when the suction nozzle 18 is inserted is prevented by the latch 38.
  • After the end of the conveying process, that is to say when the toner container 10 is changed, the suction nozzle 18 is pulled out of the toner container 10 by means of the handle 26. The toner adhering to the proboscis 18 is removed when it is pulled out by the scraper ring 29 and falls back into the interior of the bottle. The rubber bellows 28 covers the possibly slightly dirty suction nozzle 18 and thus offers protection against accidental contact.
  • When the rubber bellows 28 is compressed, that is to say when it penetrates into the toner bottle 10, pressure compensation takes place through a bore 45.
  • If the suction nozzle 18 is completely pulled out of the toner bottle 10, the compression spring 43 can press the lifting rod 40 down and thereby lock the suction nozzle 18 with the retaining pin 42. Likewise, the pin 39 which interacts with the locking lug 38 is released and the receptacle 32 with the toner container 10 can be pivoted away.
  • In order to ensure a safe supply of the toner 11 into the suction area of the suction nozzle 18 when the suction nozzle is inserted, a vibrating device can be provided in the receiving area (FIG. 4). B. consists of a knocking hammer 46 which is pivotally arranged in the receiving device and which can be deflected against a spring force 47 via an electromagnet 48. This knocking hammer 46 forms a type of vibrating device which detaches any toner still adhering to the inner walls of the toner container 10.
  • In printing devices operating on the principle of electrophotography, the residual toner remaining on the photoconductor drum must be replaced by a vacuum after the transfer printing process applied brush cleaning station are transported away from the photoconductor drum and separated by a cyclone filter into a collecting container.
  • 8, an empty toner container 10 can serve as a collecting container for this residual toner. For this purpose, an empty toner container is placed in a holding container 49, which has a wedge-shaped insert 40 in its base region, which is shaped in accordance with the base surface area 12 of the toner container 10. The holding container 49 with the empty toner container 10 arranged therein can be fastened to the hook 53 of the outlet pipe 54 of the cyclone filter (not shown here) by means of corresponding clamping mechanisms 51 and 52.

Claims (9)

1. Device for transporting toner (11) from a transport container (10) to a developer station of a non-mechanical printer or copier, characterized by a suction tube (18), arranged in a movable manner in a guide device (19) inside a toner-tight protective sleeve (28), which suction tube communicates via a pipe (20) with the developer station and characterized by an adapter (27) connected to the protective sleeve (28) for the purpose of securing the toner container (10) to a filling and emptying hole (14) in a detachable, toner-tight manner, the suction tube (18) dipping into the toner container (10) through the adapter (27) for emptying the toner container (10).
2. Device according to Claim 1, characterized in that the guide device (19) receiving the suction tube (18) in a vertically moveable manner is arranged above a retaining device (32) to receive the toner container (10) in such a way that during the extraction process the suction tube (18) dips, due to its own weight, into the toner container (10).
3. Device according to one of Claims 1 or 2, characterized in that the retaining device (32) is designed to swing out of the apparatus to receive the toner container (10).
4. Device according to one of Claims 1 to 3, characterized in that the adapter (27) has a safety device (42) for the suction tube (18) which, on the one hand, only enables the suction tube (18) to dip into the transport container (10) after connection of the transport container (10) to the adapter (27) and, on the other hand, prevents the connection from being detached when the suction tube (10) is dipped in.
5. Device according to one of Claims 1 to 4, characterized in that the adapter has a cutting device (31) for piercing a film (17) covering the filling and removal hole (14) of the toner container (10) in the filled state.
6. Device according to one of Claims 1 to 5, characterized in that the protective sleeve consists of flexible bellows (28) which are secured on the one hand to the connecting area of the suction tube, and on the other hand to the adapter.
7. Device according to one of Claims 1 to 6, characterized in that the adapter has a toner wiping ring (29) which receives the suction tube.
8. Device according to one of Claims 1 to 7, characterized in that the toner container (10) has a funnel-shaped bottom, which forms a deepest collecting area for the toner (11), the filling arid emptying hole (14) and the collecting area being arranged relative to each other in such a way that, when the toner container is secured in the retaining device in a removal position, in which the collecting area forms the deepest area of the toner container (10), the suction tube (18) assigned to the printer or copier dips into the collecting area.
9. Device according to one of Claims 1 to 8, characterized in that the suction tube (18) has an inner pipe (21) connected to the pipe (20) and having suction ports (22) and an outer pipe (23) enveloping the inner pipe (21) with clearance, the outer pipe (23) having toner inlets (25) and air suction ports (24), so that the suction air streaming through the outer pipe (23) sucks the toner (11) through the toner inlet (25) into the inner pipe (21).
EP19870906162 1986-10-02 1987-09-25 Device enabling the clean replacement of a toner container in a toner transfer system of a non-mechanical printer or copier Expired - Lifetime EP0308431B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19863633593 DE3633593A1 (en) 1986-10-02 1986-10-02 Device for changing a toner container in a toner conveyor of a non-mechanical printing or copying device
DE3633593 1986-10-02

Publications (2)

Publication Number Publication Date
EP0308431A1 EP0308431A1 (en) 1989-03-29
EP0308431B1 true EP0308431B1 (en) 1990-03-07

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EP19870906162 Expired - Lifetime EP0308431B1 (en) 1986-10-02 1987-09-25 Device enabling the clean replacement of a toner container in a toner transfer system of a non-mechanical printer or copier

Country Status (5)

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US (1) US5074342A (en)
EP (1) EP0308431B1 (en)
JP (1) JPH02500056A (en)
DE (1) DE3633593A1 (en)
WO (1) WO1988002505A1 (en)

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DE3224296C1 (en) * 1982-06-29 1983-06-09 Siemens Ag Device for filling and sieving toner from a container into a toner storage container
US4583660A (en) * 1982-09-27 1986-04-22 Hewlett-Packard Company Vibratory toner dispensing system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19642570A1 (en) * 1996-10-15 1998-04-30 Oce Printing Systems Gmbh Devices for supplying and discharging toner
DE19642570B4 (en) * 1996-10-15 2007-08-16 OCé PRINTING SYSTEMS GMBH Devices for supplying toner

Also Published As

Publication number Publication date
JPH02500056A (en) 1990-01-11
DE3633593A1 (en) 1988-04-07
EP0308431A1 (en) 1989-03-29
US5074342A (en) 1991-12-24
WO1988002505A1 (en) 1988-04-07

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