EP0078382B1 - Device for drying printed sheets in offset printing machines - Google Patents
Device for drying printed sheets in offset printing machines Download PDFInfo
- Publication number
- EP0078382B1 EP0078382B1 EP82108401A EP82108401A EP0078382B1 EP 0078382 B1 EP0078382 B1 EP 0078382B1 EP 82108401 A EP82108401 A EP 82108401A EP 82108401 A EP82108401 A EP 82108401A EP 0078382 B1 EP0078382 B1 EP 0078382B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- infrared radiators
- rows
- blowers
- sheets
- delivery
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/044—Drying sheets, e.g. between two printing stations
- B41F23/0443—Drying sheets, e.g. between two printing stations after printing
Definitions
- the invention relates to a device for drying printed sheets on offset printing machines according to the preamble of claim 1.
- a drying device by means of emitters is already known ( " Elektro-excellentr”, Essen, No. 4-24. Jan 1953, page 34, picture 7), in which the emitters are arranged at a great distance above the delivery of a high-speed press. Due to the high energy losses, this machine only achieves an hourly machine output of 2000 sheets. Thus, the known infrared drying device in no way meets today's requirements.
- FIG. 52-56615 Japanese Patent No. Sho 52-56615
- FIG. 52-56615 shows an embodiment of an infrared dryer, which is also arranged above the delivery stack. Both runs of the delivery chain are passed between the stack and the infrared radiators, so that between the stack surface, i.e. There is a greater distance between the last sheet fed and the emitters and a high output power is therefore required for the emitters themselves.
- the heat loss caused by the large distance not only heats the mechanical parts in the delivery, e.g. the delivery chain with the gripper bars, but also releases a large amount of heat unused to the environment.
- This known design is not only very extensive and expensive in terms of its structure, but also has considerable energy losses, which immediately increase the cost of the production to be produced.
- the object of the invention is to provide an infrared drying device for high-speed offset printing presses, which enables effective drying of the differently printed materials in the area of the sheet delivery with the least technical effort, has the lowest possible energy consumption, the heat losses of which are optimally low and which are easy for the respective person Dry conditions and operating modes can be adjusted.
- a major advantage of the embodiment according to the invention is that the infrared radiators are arranged directly above the delivery stack, so that their heating output can be selected to be approximately half lower with the same drying output on the sheets. Because the emitters can be adjusted in the vicinity of the sheets during operation of the drying device, all common inks and substrates for the iR area can be dried at the lowest possible cost. It is also possible to ensure that the sheets are deposited evenly by simply changing the emitters against the blowers, to precisely adapt the drying device to the respective requirements and to bring about additional heat transport to the printed surface of the sheets with the air that is required anyway.
- the sheets 1 show a sheet delivery which is known per se, in which the sheets 1 are gripped by a gripper system 2 and are transported over the delivery stack 5 from delivery chains provided on both sides within the side frames 3.
- the grippers of the gripper system 2 open, so that the sheets are braked by the braking device 6 and sink onto the delivery stack 5.
- the delivery chains are then deflected at the end of the delivery stack via sprockets 7 in such a way that the upper chain center 8 moves back into the machine.
- infrared emitters 19 are provided above the sheets fed by means of the delivery chain 4 and are combined into rows of emitters via holders 11.
- the rows of emitters extend across the width of the supplied sheets 1 and are lowered via scissor joints 12 in the working position to just above the supplied sheets or via the delivery stack 5.
- intensive drying is achieved without large heat losses.
- they have an intensive effect of heat on the printed image or on the sheet stack, so that the drying speed is accelerated.
- the solvents released by the printing ink are removed from the sheets.
- the scissor joints 12 are fastened to guides 13 which can be displaced along guide rails 14 longitudinally to the sheet transport direction, in such a way that the rows of emitters are used sooner or later in relation to the incoming sheets.
- the infrared emitters can be raised out of the working position via the scissor joints 12, so that they release an underlying second guide rail 15.
- Blowers 16, 17, 18 are provided on this, which are also combined into rails by means of rails 19.
- These rows of blowers can also be moved on the guide rails 15 in the longitudinal direction of the machine, up to the region of the infrared radiator rows (FIG. 2).
- These blowers press the released sheets 1 very quickly onto the delivery stack 5, so that the dimensions machine can be operated at high production speed.
- a blower series is not required for a specific print job, it can, as shown in FIG. 1, be plugged onto the guide rail 14 in the waiting position (blower series 18).
- the guide rails 14, 15 are fastened to the side frames 3 via holders 20, 21.
- the individual elements of both the infrared radiators 9, 10 and the blowers 16, 17, 18 are exchangeably attached to brackets 11 or rails 19.
- the infrared heater series or the fan series can also be switched on or off individually.
- the drying device described thus enables an easy change from one operating mode to another, without the air flow being disturbed, and ensures that the individual sheets are deposited correctly without the printed image being damaged by sticking them together.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Drying Of Solid Materials (AREA)
Description
Die Erfindung bezieht sich auf eine Vorrichtung zum Trocknen von bedruckten Bogen an Offsetdruckmaschinen gemäss dem Oberbegriff des Anspruchs 1.The invention relates to a device for drying printed sheets on offset printing machines according to the preamble of claim 1.
Es ist bereits eine Trockeneinrichtung mittels Strahlern bekannt ("Elektro-Anzeiger", Essen, Nr. 4-24. Jan. 1953, Seite 34, Bild 7), bei der die Strahler mit grossem Abstand über der Auslage einer Schnellpresse angeordnet sind. Aufgrund der hohen Energieverluste erreicht diese Anlage nur eine stündliche Maschinenleistung von 2000 Bogen. Somit entspricht die bekannte Infrarottrokkeneinrichtung in keiner Weise den heutigen Erfordernissen.A drying device by means of emitters is already known ( " Elektro-Anzeiger", Essen, No. 4-24. Jan 1953, page 34, picture 7), in which the emitters are arranged at a great distance above the delivery of a high-speed press. Due to the high energy losses, this machine only achieves an hourly machine output of 2000 sheets. Thus, the known infrared drying device in no way meets today's requirements.
Eine weitere Vorrichtung dieser Art (japanisches Patent Nr. Sho 52-56615) zeigt eine Ausführung eines Infrarottrockners, der ebenfalls oberhalb des Auslagestapels angeordnet ist. Zwischen Stapel und den Infrarotstrahlern werden beide Trums der Auslagekette hindurchgeführt, so dass zwischen Stapeloberfläche, d.h. zwischen dem zuletzt zugeführten Bogen und den Strahlern, ein grösserer Abstand besteht und somit für die Strahler selbst eine hohe Ausgangsleistung erforderlich ist. Die durch den grossen Abstand verursachte Verlustwärme erhitzt nicht nur die mechanischen Teile in der Auslage wie z.B. die Auslagekette mit den Greiferleisten, sondern gibt auch eine grosse Wärmemenge ungenutzt an die Umgebung ab. Diese bekannte Ausführung ist nicht nur in ihrem Aufbau sehr umfangreich und kostspielig, sondern weist auch erhebliche Energieverluste auf, die unmittelbar eine Verteuerung der herzustellenden Produktion verursachen.Another device of this type (Japanese Patent No. Sho 52-56615) shows an embodiment of an infrared dryer, which is also arranged above the delivery stack. Both runs of the delivery chain are passed between the stack and the infrared radiators, so that between the stack surface, i.e. There is a greater distance between the last sheet fed and the emitters and a high output power is therefore required for the emitters themselves. The heat loss caused by the large distance not only heats the mechanical parts in the delivery, e.g. the delivery chain with the gripper bars, but also releases a large amount of heat unused to the environment. This known design is not only very extensive and expensive in terms of its structure, but also has considerable energy losses, which immediately increase the cost of the production to be produced.
Aufgabe der Erfindung ist es, eine Infrarottrocknungsvorrichtung für schnellaufende Offsetdruckmaschinen zu schaffen, die im Bereich der Bogenauslage bei geringstem technischen Aufwand ein wirkungsvolles Trocknen der unterschiedlich bedruckten Materialien ermöglicht, einen geringstmöglichen Energiebedarf aufweist, deren Wärmeverluste optimal gering sind und die auf einfache Weise an die jeweiligen Trockenbedingungen und Betriebsarten angeglichen werden kann.The object of the invention is to provide an infrared drying device for high-speed offset printing presses, which enables effective drying of the differently printed materials in the area of the sheet delivery with the least technical effort, has the lowest possible energy consumption, the heat losses of which are optimally low and which are easy for the respective person Dry conditions and operating modes can be adjusted.
Gemäss der Erfindung wird die Aufgabe durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst. Ein wesentlicher Vorteil der erfindungsgemässen Ausführung ist, dass die Infrarotstrahler unmittelbar über dem Auslagestapel angeordnet sind, so dass hierdurch bereits deren Heizleistung um ca. die Hälfte geringer gewählt werden kann bei gleicher Trockenleistung an den Bogen. Durch die Anstellbarkeit der Strahler während des Betriebs der Trockenvorrichtung in die Nähe der Bogen können alle gebräuchlichen Farben und Bedruckstoffe für den iR-Bereich bei geringstem Aufwand an Kosten getrocknet werden. Auch lässt sich durch das leichte Wechseln der Strahler gegen Gebläse eine gleichmässige Ablage der Bogen gewährleisten, eine exakte Anpassung der Trokkenvorrichtung an die jeweiligen Erfordernisse durchführen und mit der ohnedies benötigten Luft einen zusätzlichen Wärmetransport auf die bedruckte Oberfläche der Bogen herbeiführen.According to the invention, the object is achieved by the features of the characterizing part of claim 1. A major advantage of the embodiment according to the invention is that the infrared radiators are arranged directly above the delivery stack, so that their heating output can be selected to be approximately half lower with the same drying output on the sheets. Because the emitters can be adjusted in the vicinity of the sheets during operation of the drying device, all common inks and substrates for the iR area can be dried at the lowest possible cost. It is also possible to ensure that the sheets are deposited evenly by simply changing the emitters against the blowers, to precisely adapt the drying device to the respective requirements and to bring about additional heat transport to the printed surface of the sheets with the air that is required anyway.
Die Unteransprüche kennzeichnen vorteilhafte Ausgestaltungen des Erfindungsgegenstandes und ermöglichen bei geringstem technischen Aufwand und bei geringstem Platzbedarf in der Maschine einen Einbau der Trockenvorrichtung ohne grösseren technischen Umbau.The subclaims characterize advantageous refinements of the subject matter of the invention and enable the drying device to be installed without major technical modifications, with the least technical outlay and with the smallest space requirement in the machine.
Ein Ausführungsbeispiel ist in den Zeichnungen schematisch dargestellt. Es zeigt:
- Fig. 1 eine Seitenansicht einer Bogenauslage mit Trockenvorrichtung,
- Fig. 2 eine Seitenansicht mit abgestellter Trokkenvorrichtung,
- Fig. 3 eine Draufsicht auf die Trockenvorrichtung.
- 1 is a side view of a sheet delivery with drying device,
- 2 is a side view with the drying device turned off,
- Fig. 3 is a plan view of the drying device.
In Fig. 1 ist eine an sich bekannte Bogenauslage dargestellt, bei der die Bogen 1 von einem Greifersystem 2 erfasst sind und von beiderseits innerhalb der Seitengestelle 3 vorgesehenen Auslageketten über den Auslagestapel 5 transportiert werden. Zum Ablegen der Bogen 1 öffnen die Greifer des Greifersystems 2, so dass die Bogen von der Bremseinrichtung 6 abgebremst auf den Auslagestapel 5 absinken. Die Auslageketten werden sodann am Ende des Auslagestapels über Kettenräder 7 umgelenkt, derart, dass sich das obere Kettentrum 8 wieder in die Maschine zurückbewegt.1 shows a sheet delivery which is known per se, in which the sheets 1 are gripped by a gripper system 2 and are transported over the
Um die dem Auslagestapel 5 zugeführten, frisch bedruckten Bogen 1 ohne Verkleben ablegen zu können, sind oberhalb der mittels Auslagekette 4 zugeführten Bogen Infrarotstrahler 19 vorgesehen, die über Halterungen 11 zu Strahlerreihen zusammengefasstsind. Die Strahlerreihen erstrecken sich über die Breite der zugeführten Bogen 1 und sind über Scherengelenke 12 in Arbeitsstellung bis unmittelbar über die zugeführten Bogen bzw. über den Auslagestapel 5 abgesenkt. Hierdurch wird eine intensive Trocknung erreicht, ohne dass grosse Wärmeverluste entstehen. Ausserdem bewirken sie eine intensive Einwirkung der Wärme auf das Druckbild bzw. auf den Bogenstapel, so dass hierdurch die Trockengeschwindigkeit beschleunigt wird. Gleichzeitig werden die von der Druckfarbe freigegebenen Lösungsmittel von den Bogen entfernt.In order to be able to deposit the freshly printed sheets 1 fed to the
Die Scherengelenke 12 sind an Führungen 13 befestigt, die auf Leitschienen 14 tängs zur Bogentransportrichtung verschiebbar sind, derart, dass die Strahlerreihen im Verhältnis zu den ankommenden Bogen früher oder später eingesetzt werden.The
Wird mit der Maschine ein normaler Druckauftrag ohne Infrarotfarben gedruckt, so sind die Infrarotstrahler über die Scherengelenke 12 aus der Arbeitsstellung heraus anhebbar, so dass sie eine darunterliegende zweite Leitschiene 15 freigeben. Auf dieser sind Gebläse 16,17,18 vorgesehen, die ebenfalls über Schienen 19 zu Gebläsereihen zusammengefasst sind. Auch diese Gebläsereihen sind auf den Leitschienen 15 in Längsrichtung der Maschine bewegbar und zwar bis in den Bereich der Infrarotstrahlerreihen (Fig. 2). Diese Gebläse drücken die freigegebenen Bogen 1 sehr schnell auf den Auslagestapel 5 nieder, so dass die Maschine mit hoher Produktionsgeschwindigkeit betrieben werden kann. Sollte eine Gebläsereihe für einen bestimmten Druckauftrag nicht benötigt werden, so kann diese,wie in Fig. 1 dargestellt, auf der Leitschiene 14 in Warteposition aufgesteckt werden (Gebläsereihe 18).If the machine is used to print a normal print job without infrared colors, the infrared emitters can be raised out of the working position via the
Die Leitschienen 14, 15 sind über Halter 20, 21 an den Seitengestellen 3 befestigt. Die Einzelelemente sowohl der Infrarotstrahler 9, 10 als auch der Gebläse 16, 17, 18 sind an Halterungen 11 bzw. Schienen 19 austauschbar befestigt. Auch lassen sich die Infrarotstrahlerreihen bzw. die Gebläsereihen für sich einzeln zu- bzw. abschalten. Die beschriebene Trockenvorrichtung ermöglicht somit ein leichtes Wechseln von einer Betriebsart auf eine andere, ohne dass die Luftführung gestört wird, und gewährleistet eine einwandfreie Ablage der einzelnen Bogen, ohne dass eine Beschädigung des Druckbildes durch Zusammenkleben derselben erfolgen kann.The
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3143089 | 1981-10-30 | ||
DE19813143089 DE3143089A1 (en) | 1981-10-30 | 1981-10-30 | DEVICE FOR DRYING PRINTED SHEETS ON OFFSET PRINTING MACHINES |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0078382A1 EP0078382A1 (en) | 1983-05-11 |
EP0078382B1 true EP0078382B1 (en) | 1984-09-12 |
Family
ID=6145209
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP82108401A Expired EP0078382B1 (en) | 1981-10-30 | 1982-09-11 | Device for drying printed sheets in offset printing machines |
Country Status (5)
Country | Link |
---|---|
US (1) | US4449453A (en) |
EP (1) | EP0078382B1 (en) |
JP (1) | JPS58134750A (en) |
AT (1) | AT383082B (en) |
DE (1) | DE3143089A1 (en) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
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US4730000A (en) * | 1984-04-09 | 1988-03-08 | Abbott Laboratories | Quinoline antibacterial compounds |
US4517894A (en) * | 1983-07-21 | 1985-05-21 | Davis James R | Modular screen printing apparatus |
US4773167A (en) * | 1986-05-19 | 1988-09-27 | Amjo Infra Red Dryers, Inc. | Heater |
US4811493A (en) * | 1987-08-05 | 1989-03-14 | Burgio Joseph T Jr | Dryer-cooler apparatus |
FR2653867B1 (en) * | 1989-10-31 | 1992-08-21 | France Rayonnement | UV DRYING ASSEMBLY WITH SEVERAL TRANSMITTERS. |
SE9001733L (en) * | 1990-05-11 | 1991-10-28 | Ivt Graphics Ab | DEVICE FOR INFRARED TORK FOR ARCHPRESSES |
US5317127A (en) * | 1992-08-28 | 1994-05-31 | Pitney Bowes Inc. | Apparatus including air blowing and infrared light means for drying ink on a sheet |
DE9214459U1 (en) * | 1992-10-26 | 1993-02-04 | Weitmann & Konrad GmbH & Co KG, 7022 Leinfelden-Echterdingen | Device for thermal drying of material webs, sheets, etc. |
DE4308712B4 (en) * | 1993-03-18 | 2005-10-13 | Windmöller & Hölscher Kg | press |
DE4322324C2 (en) * | 1993-07-05 | 2002-01-17 | Heidelberger Druckmasch Ag | Sheet transport and sheet guiding in the delivery area of rotary printing machines |
DE4325725C2 (en) * | 1993-07-30 | 1998-02-19 | Cleanpack Gmbh Innovative Verp | Method and device for winding film webs printed in roll offset printing |
US5537925A (en) * | 1993-09-03 | 1996-07-23 | Howard W. DeMoore | Infra-red forced air dryer and extractor |
US6293196B1 (en) | 1993-10-06 | 2001-09-25 | Howard W. DeMoore | High velocity, hot air dryer and extractor |
DE19549845B4 (en) * | 1995-06-24 | 2007-07-12 | Heidelberger Druckmaschinen Ag | Device for achieving a perfect support of a printing material in a printing press |
DE19546720A1 (en) * | 1995-12-14 | 1997-06-19 | Hans Georg Platsch | Powdering device |
US5966836A (en) * | 1997-04-11 | 1999-10-19 | Howard W. DeMoore | Infrared heating apparatus and method for a printing press |
DE29800579U1 (en) * | 1998-01-15 | 1999-05-12 | MAN Roland Druckmaschinen AG, 63075 Offenbach | Drying device on a sheet transport system of a printing press |
US6951172B2 (en) | 1998-03-31 | 2005-10-04 | Heidelberger Druckmaschinen Ag | Accessory for a printing unit |
DE19814661B4 (en) * | 1998-03-31 | 2004-05-13 | Heidelberger Druckmaschinen Ag | Additional device for a printing unit |
US6367999B1 (en) * | 1999-02-15 | 2002-04-09 | Hewlett-Packard Company | Hardcopy apparatus and method for providing uniform pressure to hold down media |
US6877247B1 (en) | 2000-08-25 | 2005-04-12 | Demoore Howard W. | Power saving automatic zoned dryer apparatus and method |
DE10101775A1 (en) * | 2001-01-17 | 2002-07-18 | Nexpress Solutions Llc | Conditioning device for lowering the moisture content in print media, especially paper products, by placing media on a cloth roll that is driven by rollers with heaters placed inside them |
Family Cites Families (20)
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US1955055A (en) * | 1928-06-25 | 1934-04-17 | Nellie B Date | Electrical heater |
CH149442A (en) * | 1930-09-17 | 1931-09-15 | Strahm Robert | Equipment on sheet-fed printing machines for rapid drying of the sheets. |
GB386840A (en) * | 1932-04-19 | 1933-01-26 | Robert Strahm | Improvements in apparatus for drying printed sheets |
DE613552C (en) * | 1933-02-28 | 1935-05-22 | Maschf Augsburg Nuernberg Ag | Sheet execution device for rotogravure printing machines |
AT140272B (en) * | 1934-03-03 | 1935-01-25 | Maschf Augsburg Nuernberg Ag | Sheet delivery for printing machines. |
US2041238A (en) * | 1934-05-23 | 1936-05-19 | Beistle Company | Attachment for printing presses |
US2220928A (en) * | 1937-05-22 | 1940-11-12 | American Can Co | Method of and apparatus for producing and utilizing radiant heat |
US2269236A (en) * | 1939-03-02 | 1942-01-06 | Svenska Flaektfabriken Ab | Method and device for controlling the heat supply in cellulose driers |
GB576829A (en) * | 1942-04-24 | 1946-04-23 | Gen Electric Co Ltd | Improvements in paint-drying and like apparatus |
CH229202A (en) * | 1942-07-17 | 1943-10-15 | Mailaender Willy | Process for drying printed surfaces, in particular in multicolor rotogravure printing machines and multicolor rotogravure printing machines. |
GB781105A (en) * | 1954-02-19 | 1957-08-14 | Fr Des Antimaculateurs Electro | An apparatus for the rapid drying of printed sheets |
US3499231A (en) * | 1964-06-23 | 1970-03-10 | Fostoria Fannon Inc | A fast automatic infrared drying and fusing apparatus for a high melt coating on an easily combustible web |
FR2086751A5 (en) * | 1970-04-08 | 1971-12-31 | Leguen Georges | |
SU474664A1 (en) * | 1972-12-11 | 1975-06-25 | Проектно-Конструкторское Бюро Мебели | Installation for drying paint coatings on the edges of the boards |
JPS49119710A (en) * | 1973-03-19 | 1974-11-15 | ||
DE2351280B2 (en) * | 1973-10-12 | 1979-01-25 | Babcock-Bsh Ag Vormals Buettner- Schilde-Haas Ag, 4150 Krefeld | Impact jet dryer for web-shaped goods |
DE2731075A1 (en) * | 1977-07-09 | 1979-01-25 | Eugen Knobel | Continuous operation oven for strip material processing - has infrared plastics sintering heater used also for heating drying air |
IT8021284V0 (en) * | 1980-03-25 | 1980-03-25 | Argon Service Ltd | INFRARED DRYING OVEN OF THE PERFECT TYPE. |
DE3107487A1 (en) * | 1981-02-27 | 1982-09-16 | Svecia Silkscreen Maskiner AB, 14502 Norsborg | Drying installation |
JPH05256615A (en) * | 1992-03-11 | 1993-10-05 | Ngk Insulators Ltd | Thickness measuring method for cylindrical ceramic molding |
-
1981
- 1981-10-30 DE DE19813143089 patent/DE3143089A1/en active Granted
-
1982
- 1982-09-11 EP EP82108401A patent/EP0078382B1/en not_active Expired
- 1982-09-23 AT AT0353782A patent/AT383082B/en not_active IP Right Cessation
- 1982-10-20 US US06/435,390 patent/US4449453A/en not_active Expired - Lifetime
- 1982-10-29 JP JP57189324A patent/JPS58134750A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
DE3143089A1 (en) | 1983-05-26 |
DE3143089C2 (en) | 1989-02-23 |
JPH0331579B2 (en) | 1991-05-07 |
ATA353782A (en) | 1986-10-15 |
US4449453A (en) | 1984-05-22 |
EP0078382A1 (en) | 1983-05-11 |
AT383082B (en) | 1987-05-11 |
JPS58134750A (en) | 1983-08-11 |
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