EP1066160B1 - Procede et machine d'impression offset - Google Patents

Procede et machine d'impression offset Download PDF

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Publication number
EP1066160B1
EP1066160B1 EP99911701A EP99911701A EP1066160B1 EP 1066160 B1 EP1066160 B1 EP 1066160B1 EP 99911701 A EP99911701 A EP 99911701A EP 99911701 A EP99911701 A EP 99911701A EP 1066160 B1 EP1066160 B1 EP 1066160B1
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EP
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Prior art keywords
air
sheet
printing
printing machine
sheets
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EP99911701A
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German (de)
English (en)
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EP1066160A1 (fr
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Hans-Peter Koch
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Individual
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Individual
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    • 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
    • B41F23/06—Powdering devices, e.g. for preventing set-off
    • 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
    • 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 an offset printing method and a Offset printing machine according to the preamble of the claims 1 and 9.
  • UV drying mainly in sheetfed offset printing is used, the printing ink with UV lamps irradiated with ultraviolet light, the Photo initiators contained in the ink break down into radicals. These very reactive molecules accelerate the polymerization of the binder so that the printing ink increases in a very short time hardens a nail-hard scratch-resistant color film.
  • adversely UV drying includes the high cost of required special UV inks, the relatively high Energy consumption, the limited operating time of the UV lamps and the need for special, in part harmful detergents.
  • IR drying which is also predominantly in the Sheetfed offset printing is used
  • the substrate is after printing with IR emitters in the short-wave and irradiated medium wave range, causing the temperature of the Substrate and the printing ink increased and therefore without that Requires special inks to both knock off and chemical drying also accelerates.
  • Disadvantages of IR drying are the strong heat generation that the UV drying even higher energy consumption and proportionate high investment costs. It can also be caused by heating of the substrate to dimensional changes and possible Registration differences come.
  • the hot air and / or gas flame drying is particularly in web offset printing in connection with so-called heat set printing inks used, the drying by evaporation of the Solvent takes place.
  • the substrate is replaced by a Led in the dryer, in which he heated air with high pressure and is fed at high speed from nozzles so that Evaporation of solvents and other volatile components to accelerate and the polymerization of the ink promote.
  • this drying especially the undesirable drying out of the Printing material disadvantageous, leading to dimensional changes through shrinkage.
  • a printing press is already known from WO 97/04962 known type, in which the arcuate Printing material is dried with the help of infrared radiators, between the printing units of the printing press and behind the last printing unit or in the sheet delivery, with additional coolness near each infrared heater dry air is supplied to the drying of the ink to accelerate and also the operating temperature reduce neighboring facilities.
  • Behind the last one Printing unit are the infrared emitters together with gas lines and blow nozzles to supply air either in the immediate vicinity Arranged near the last impression cylinder, or if there there is no space within the sheet delivery between the dreams of the sheet conveyor.
  • EP 0 723 128 A1 describes a method for hardening of paint or aqueous or solvent-based paints Objects and especially for drying Printing inks on substrates already known per se, air to blow onto the surface of the object that was previously through run a dryer and remove moisture has been dried so that it is low absolute Moisture values and therefore a quick even Drying process allows.
  • the dried air is there however, via a system of blown air rods with holes blown onto the surface of the substrate and by means of Extracted suction devices.
  • Swiss Patent No. 113365 is also already disclosed a printing machine for sheet printing, in the printed sheets in a sheet delivery through openings a bridge roller with air on its unprinted underside be acted upon to increase their drying effect previously over calcium chloride or other moisture absorbent substance has been conducted.
  • a bridge roller with air on its unprinted underside be acted upon to increase their drying effect previously over calcium chloride or other moisture absorbent substance has been conducted.
  • German patent specification 436 933 Air-dried print products that are first used to dry Reducing their absolute humidity chilled and then again is warmed up because then the printed matter quickly dries as it removes the moisture contained in them eager to take up.
  • the invention is based on the object in a method and a device of the beginning mentioned type the drying of the sheets without the use of To improve infrared radiators so that a trouble-free Transport and a sticky deposit of the sheets on the Sheet stack is possible without being in the delicate Area between the last printing unit of the printing press and the sheet delivery requires internals or the Air flow conditions are changed.
  • the air previously dried with the removal of moisture has a very low absolute moisture content of less than 5 g / m 3 , so that when it comes into contact with the surface-adhering water it causes an abrupt evaporation without the moisture content inside the printing material being changed significantly , In this way, changes in dimension and / or blistering in the case of heavily coated papers can be reliably avoided.
  • the measures according to the invention make it possible for a Application in a delivery of a sheetfed offset press, the Ink in the relatively short period between the exit of the sheets from the last printing unit and their Place it on the stack of sheets to dry so far that a immediate handling is possible and a significantly shortened Waiting time until further processing can be achieved.
  • a preferred embodiment of the invention provides that the air for drying is passed through a refrigeration dryer to bring its absolute moisture to a value of less than 5 g / m 3 , corresponding to a dew point of approximately 0 ° C. and preferably less than 1 g / m 3 , corresponding to a dew point of approximately -19 ° C.
  • a sorption dryer can also be used for drying, in which the air flows through a drying agent such as CaCl 2 , BaO, Mg (ClO 4 ) 2 or the like. In such a dryer, the residual water content of the air can be reduced to values below 0.01 g / m 3 or even to values below 0.001 g / m 3 .
  • the air is released before it is brought near the substrate expediently warmed up a little, especially following one Cold drying, its temperature when in contact with the Printing material is preferably between 30 and 40 degrees, so that no thermal insulation of the sheet delivery against the Environment is required.
  • a further advantageous embodiment of the invention provides before that the supplied dry air after contact with the substrate and thus after absorbing moisture suctioned off at least partially by means of a suction device , which is preferably horizontal in sheetfed offset printing Section of the sheet delivery above the conveyor run of the Chain boom is arranged.
  • the dried air is preferably fed into the Proximity of the substrate immediately after the exit the substrate from the last printing unit of the printing press, the dried air after both for intermediate drying one-sided printing as well as for final drying of the printing material printed on both sides can serve. Further can already be between two printing units of the printing press dried air is directed near the substrate to create a. after each ink and dampening solution application superficial drying of the applied ink and the To achieve substrate.
  • sheetfed offset printing looks a particularly preferred one Embodiment of the invention, at least part of the in the sheet delivery of the sheetfed offset printing machine Compressed air sheet guiding devices with previously dried To apply air.
  • sheet guiding devices include, for example, pressurized air Sheet baffles that make up the air from below against the sheet flows, guide bar blowers, blowing air nozzles in front of the bow brakes or blown air rake above the sheet exit opening.
  • the dried air or a Part of the same through additionally provided nozzles Housing of the sheet delivery are blown, preferably at least partially in the space between an upper one Empty strand and a lower conveyor strand within the Housing arranged conveyor, which the printed Sheets are transported to a stack of sheets.
  • the dried and preferably also filtered and with it from moisture as well as from powder or others Dust-like pollutants release air from outside in a targeted manner fed the case to the sheet delivery and into the area transported just behind the press, while at the same time an inflow of ambient air and / or with Moisture and powder contaminated air from inside the Display in this area is prevented.
  • the air will preferably at a distance from the printing press into the housing guided and pulled by an empty dream of the Sheet conveyor transported to the printing press, causing a change in flow conditions immediately can be avoided behind the press.
  • the Influx of polluted air from inside the Sheet delivery can be prevented if a along the Empty run of the conveyor towards the printing press Air flow in the direction of movement of the empty run before the point where the dried air is interrupted is fed into the housing.
  • the pre-dried air supplied can do more Absorb moisture than from the area around the sheet delivery or printing machine sucked in undried air, whereby without additional measures of moisture content in the stack before and kept essentially unchanged after printing can be.
  • Another preferred embodiment of the invention provides that the pre-dried air at one or more between the point of interruption or the powder apparatus and the Display drum lying in the housing of the Sheet delivery and conveniently close to the path of movement an empty strand of the chain conveyor and fed by it Suction is transported towards the printing press.
  • the along the empty run of the chain conveyor to the delivery drum flowing air is there together with the chain conveyor redirected towards the free end of the display, see above that are above and below that of the bow grabbers seized bow form air cushions that next to a Calming of the sheet run also for further drying of the Worry.
  • the air storage and the nozzle boxes are preferably with a cold and / or Sorption dryer connected by a compressor air compressed by the printing press with the withdrawal of Moisture is dried.
  • the air storage can be under a slight overpressure are kept so that the air is always inside the housing the sheet delivery is fed.
  • the air is preferably in the Inside the air storage, however, under atmospheric pressure. This enables according to a further preferred embodiment or Alternative to the invention a simple control of the Air supply depending on the printing speed because higher printing speeds higher running speeds the Require sheet conveyor, which in turn a stronger suction is caused by the more air coming out the air reservoir is sucked in.
  • the air drying device under the Arrange sheet delivery near the compressor which the line length of the required air lines is also strong can be reduced.
  • FIG. 1 only partially and schematically illustrated eight-color sheetfed offset printing machine 2 Sheet of paper 1 in succession by means of an automated Sheet feed 4 from one in a sheet feeder 6
  • Printing machine 2 arranged paper stack 8 to a Transfer drum 10 of a first printing unit 12 and then through the first printing unit 12 and possibly further of the total eight printing units (only two shown) transported to them to print on one or both sides in one or more colors.
  • the chain conveyor 20 consists essentially of two in opposite lateral guide rails guided parallel chains (not shown), which at regular intervals by the also referred to as a gripper gripper systems 18 are.
  • the chain conveyor 20 has a lower one, the bow transporting conveyor strand (leading system) 30 on the out of two sprockets of a delivery drum 32 at an angle is moved up and then redirected to the horizontal, before there are two drive sprockets 34 at the free end of the Sheet delivery 22 reached.
  • His upper empty strand (retreating System) 36 moves horizontally from the sprockets 34 towards the printing press 2 before it slants down is deflected and returned to the delivery drum 32.
  • each sheet is 1 in Direction of movement of the conveyor run 30 through sheet baffles 38 non-contact on laterally adjustable guide arm blowers 40 over and via a sheet brake 42 arranged behind it guided and then reaches an arch exit opening 44 on the underside of the horizontal section of the housing 24 of the sheet delivery 22 to the sheet brake 42 transferred and braked sheet With the help of several arranged above the outlet opening 44 Delivery fan 46 down onto the sheet stack 26 blown. This rests on a lifting mechanism 48 that the Stack 26 in sync with the speed of the sheet feed lowers.
  • the Powder apparatus 52 pollinates the tops of those of the Arch grippers 18 of the conveyor run 30 kept pressurized Bow with a fine powdered starch powder to make a Glue the sheets together when they are attached To prevent stacking.
  • Nozzle box 58 arranged on its underside with a Variety of air outlet nozzles is provided, through which of Air that was not contaminated with powder above and previously dried is blown into the housing 24.
  • the air suction and deflection pan 56 consists essentially from a thin-walled flat housing that on its top and bottom Bottom with slit-shaped air intake openings is provided and below the lateral guides of the Empty run 36 over the entire clear width of the sheet delivery extends.
  • the housing forms a continuous closed Partition between a flow path along the production run 30 and a flow path along the empty run 36. This Partition 56 prevents the over its entire extent Air passes from top to bottom and vice versa.
  • the inside of the housing is controlled by control valves the extracted air volume and the negative pressure applied connected to a suction fan, which a dust separator with a Centrifuge and a fine filter upstream (not ) Shown.
  • the nozzle box 58 is connected by an air line 100 via an interposed controllable throttle valve 102 to a refrigeration dryer 106 arranged under the inclined section of the sheet delivery 22.
  • the cold dryer 106 is acted upon by a compressor 108 with atmospheric air, which is drawn in from the surroundings of the printing press 2 and compressed by the compressor 108 to a pressure between 1.5 and 3.5 bar.
  • a particle filter 110 is interposed between the compressor 108 and the cold dryer 106 in order to make the air fed into the nozzle box 58 dust-free.
  • the compressed air supplied is dried in the cold dryer 106, some of its moisture being removed from it and its dew point reduced to approximately -19 ° C. This means that the air emerging from the refrigeration dryer 106 has a residual water content (absolute humidity) of approximately 1 g / m 3 .
  • the cold dryer 106 is controllable via another Throttle valve 116 connected to the sheet guide plates 38, wherein the line is not shown. That is, the Sheet air baffles 38 are exposed to dried air, which consists of a variety of air outlet nozzles on the Leaves the top of the sheets 38.
  • the guide bar blowers 40 can with a controllable throttle valve 118 Cold dryer 106 may be connected, so that also for alignment the sheet uses dried air and thus the Moisture content of the air within the housing 24 is kept as low as possible.
  • the amount of air supplied in the nozzle box 58 is between 30 and 50 m 3 / h and is dimensioned such that only a part is sucked in through the upper air intake openings of the air suction and deflection pan 56, while the rest of the dried air is at the top of the air -Absaug- and deflection tray 56 is deflected in the direction of the printing press 2.
  • the air is at a relatively low pressure of 1.5 to 2 bar supplied, while the air pressure at a downstream cleaning of the sheet delivery 22 to 3 to 3.5 bar is increased.
  • the controllable throttle valve 102 in the Air line allows a clocked air supply in the Nozzle box 58.
  • the air blown down from the nozzle box 58 flows in the sheet grippers 18 and on the chains of the chain conveyor 20 passing, this being showered through the air and adhering Powder particles are carried down so that they from Empty strand 36 no further in the direction of the printing press 2 can be transported.
  • the chains and guide rails of the Chain conveyor 20 clean and saturated with fat so that a powder-related wear can be prevented.
  • simultaneously the downward flow of air forms with the two brushes 66, 68 in this area of the sheet delivery 22 between a closed housing cover on the top and the tub 56 on the bottom a lock that prevents air laden with powder and moisture along the empty run 36 in the direction of the printing press 2 flows.
  • a ventilation grille 95 is arranged through which air from outside into the Interior of the housing 24 can enter.
  • Most of this Air is drawn along by the suction of the empty run 36 the same carried in the direction of the printing press 2, while a smaller part behind one that acts as an air switch Air suction pipe 75 of the tub 56 flows down and along the back of the in the direction of the printing press 2 Powder apparatus 50 to the top of the sheets transported past to be led.
  • An air reservoir 97 is arranged above the ventilation grille 95, that from the cold dryer 106 via a pressure control valve 109 pre-dried air is supplied, which then in place of Ambient air is sucked through the ventilation grille 95.
  • the Air in the air reservoir 97 is kept under atmospheric pressure, so that depending on the amount of 36 of the empty strand Chain conveyor 20 generated negative pressure more or less dried air is supplied to the interior of the housing 24. There the amount of negative pressure with the running speed of the Chain conveyor 20 increases, can be simple in this way Control of the air supply depending on the printing speed can be achieved.
  • the extended sheet delivery 22 shown in FIG. 4 are in their lower horizontal section in two places one each with air lines (not shown) with the air dryer 97 connected to the cold dryer 106 via a mounted in the ventilation grille provided on the top of the housing, to ensure that the dried air despite the longer delivery 22 transported to the delivery drum 32 becomes.
  • one for Chain conveyor 20 parallel partition 99 may be arranged a reversal of the air flow before reaching the delivery drum 32 prevented.
  • the partition 99 can extend to the rear Extend the outside edge of the tub 56 to above in this way of the powder apparatus 50 an entry of powder in the to prevent blown or sucked powder-free air.
  • FIG. 5 Next to one in its lower horizontal section arranged and through air openings with the inside of the Air reservoir 97 connected to the housing has that in FIG. 5 shown extended sheet delivery 22 additionally in the direction of movement of the empty run 36 in front of the air reservoir 97 another nozzle box 59 and one below the Nozzle box 58 between the empty strand 36 and the conveyor strand 30 arranged air suction and deflection pan 57, their structure and function substantially that of the nozzle box 58 and corresponds to the air suction and deflection tray 56.
  • the tub 57 is somewhat flatter than the tub 58 and is used by the Side walls of the housing 24 of the sheet delivery 22 worn. at even longer sheet displays 22 can also be two such Combinations of tub 57, nozzle box 59 and air storage 97 be provided.
  • the water adhering to the printing ink and the substrate is caused by the exposure to the dried air evaporates before it is on the unprinted areas in the Knock away the printing material or on the printing ink applied powder can come into contact.
  • the rapid evaporation of the surface water on the one hand the Water absorption in the substrate is reduced and secondly prevents water on the ink from powder particles is recorded.
  • the sheet In the direction of movement, the sheet is behind the powder apparatus 50 part of the air laden with moisture and powder on the Aspirated bottom of the tub 56.
  • the measures described can cause moisture to build up the printing ink and the substrate without additional Drying facilities within a very short time, i.e. evaporated within 0.1 to 0.2 sec so that the Surface of the printing ink and substrate at The arc already passes under the powder apparatus 50 in this way are far dried that it is not or only in very little Extent to which powder adheres. This gives you a high gloss even with matt coated substrates Print product with very good image quality.
  • Fig. 6 shows an embodiment without the features of the characterizing part of independent claims 1 and 9, with other configurations.
  • the refrigeration dryer 106 is followed by a sorption dryer 120, in which further moisture is removed from the air pre-dried in the refrigeration dryer 106, so that its residual water content is less than 0.1 g / m 3 .
  • the sorption dryer 120 contains a strongly hygroscopic medium, such as CaSO 4 , BaO, KOH or another drying agent that is usually used for drying compressed air.
  • the sorption dryer 120 has two chambers filled with the drying agent, one of which is flowed through by the compressed air, while the drying agent is regenerated in the other.
  • an adsorption filter (not shown) filled with activated carbon can be provided in addition to the sorption dryer 120 in order to also accelerate the solvent content of the air To reduce drying.
  • the delivery drum 32 designed as an air cushion drum the air brakes 42 and an arranged on the sheet brakes 42 Place the delivery fan 46 over the sheet exit opening 44 arranged air rake 124 with downward pointing Air outlet nozzles, from which blow air is controlled in cycles is blown on top of the respective spreading sheet in order to to calm them down and speed up the laying process.
  • the delivery drum 32, the blowing air nozzles 122, 126, 128, 130 and the blower air rake 124 are just like the sheet guide plates 38 and the guide bracket blowers 40 each with air lines connected to the sorption dryer 120, wherein in the Air lines arranged throttle valves 140 a clockwise and quantity or pressure controlled supply of the dried air allow.
  • a heat exchanger 134 is arranged, in which the Refrigeration dryer 106 cooled compressed air back to a Temperature between 30 and 40 ° C is heated to her Increase moisture absorption without losing the environment the sheet delivery 22 to heat up excessively.
  • the heat exchanger 134 is fed with a warm heat transfer medium, the through the waste heat from drive motors of the printing press 2 can be heated or heated in other heat sources.
  • blowing air nozzles 122, 126, 128, 130 are expediently a long standstill of the printing press 2 before Commissioning of the sheet delivery 22 with dried air acts to flush the housing 24 so that from the Ambient air with a higher moisture content can be removed from it.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Claims (18)

  1. Procédé d'impression offset, dans lequel un matériau à imprimer sous forme de feuilles individuelles est imprimé dans une imprimante offset (2) pour feuilles avec une ou plusieurs encres d'impression, dont le séchage s'effectue par absorption et réticulation par suite d'une oxydation, dans lequel les feuilles sont alors acheminées depuis un dispositif de transport de feuilles (20) à travers un boítier (24) d'une sortie de feuilles (22) par-dessus un empilage de feuilles (26), et dans lequel de l'air séché préalablement par extraction d'eau est apporté dans le boítier (24) de la sortie de feuilles (22) de telle sorte que les faces larges des feuilles qui viennent juste d'être imprimées soient frappées par l'air sec apporté, caractérisé en ce que l'air séché est apporté à proximité du chemin de passage d'un brin mené (36) du dispositif de transport de feuilles (20) de sorte qu'il soit transporté sous l'effet d'aspiration du brin mené (36) dans une région de la sortie de feuilles (24) se trouvant directement derrière un dernier cylindre (16) de l'imprimante offset (2) et qu'il vienne frapper à cet endroit les faces larges des feuilles qui viennent juste d'être imprimées.
  2. Procédé d'impression selon la revendication 1, caractérisé en ce que l'air séché est apporté à l'écart de l'imprimante (2) dans le boítier (24) de la sortie de feuilles (22) et est transporté sous l'effet d'aspiration du brin mené (36) dans la direction de l'imprimante (2).
  3. Procédé d'impression selon la revendication 1 ou 2, caractérisé en ce que l'air séché est apporté dans le chemin de passage du brin mené (36) du dispositif de transport de feuilles (20).
  4. Procédé d'impression selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'en fonction de la vitesse d'impression, de l'air plus ou moins séché est apporté dans le boítier (24).
  5. Procédé d'impression selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'au moins une partie de l'air séché est dévié après avoir été approché des faces larges des feuilles qui viennent d'être imprimées et est évacué dans le même sens en même temps que les feuilles.
  6. Procédé d'impression selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les faces larges des feuilles qui viennent d'être imprimées sont soumises pendant leur transport vers l'empilement de feuilles pendant au moins 0,2 s à l'influence de l'air séché, avant d'être saupoudrées de poudre.
  7. Procédé d'impression selon l'une quelconque des revendications 1 à 6, caractérisé en ce que, dans une partie horizontale de la sortie de feuilles (22), de l'air est aspiré au-dessus de la face supérieure des feuilles.
  8. Procédé d'impression selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'un courant d'apport d'air chargé d'humidité et/ou de poudre provenant de l'environnement et/ou de l'intérieur de la sortie de feuilles est bloqué dans la région se trouvant directement derrière le dernier cylindre (16) de l'imprimante (2).
  9. Imprimante offset pour l'impression d'un matériau à imprimer sous forme de feuilles individuelles avec une ou plusieurs encres d'impression, dont le séchage s'effectue par absorption et réticulation par suite d'une oxydation, comprenant une sortie de feuilles (22) avec un boítier (24) et un dispositif de transport de feuilles (20) acheminant les feuilles sur un empilement de feuilles (26), des dispositifs (108, 106, 58, 59, 95, 97, 120, 122, 126, 128, 130) pour apporter de l'air séché auparavant dans un sécheur (106, 120) par extraction d'eau dans le boítier (24) de la sortie de feuilles, ainsi que des dispositifs (36, 58, 95, 97) pour frapper les faces larges des feuilles qui viennent d'être imprimées avec l'air séché, caractérisée en ce que les dispositifs d'apport d'air (108, 106, 58, 59, 95, 97, 120, 122, 126, 128, 130) comprennent au moins une ouverture d'entrée d'air (58, 95) qui débouche à proximité du chemin de passage d'un brin mené (36) du dispositif de transport de feuilles (20) dans le boítier (24), de sorte que l'air sec entrant soit transporté sous l'effet d'aspiration du brin mené (36) dans une région de la sortie de feuilles (22) se trouvant immédiatement derrière un dernier cylindre (16) de l'imprimante offset (2) et qu'il vienne frapper à cet endroit les faces larges des feuilles qui viennent juste d'être imprimées.
  10. Imprimante selon la revendication 9, caractérisée en ce que l'ouverture d'entrée d'air (58, 95) débouche à l'écart de l'imprimante dans le boítier.
  11. Imprimante selon la revendication 9 ou 10, caractérisée en ce que l'ouverture d'entrée d'air (58, 95) débouche au-dessus du brin mené (36) dans le boítier (24).
  12. Imprimante selon l'une quelconque des revendications 9 à 11, caractérisée en ce que les dispositifs d'apport d'air (108, 106, 58, 59, 95, 97, 122, 126, 128, 130) comprennent au moins un réservoir d'air (97) qui contient de l'air séché se trouvant à la pression atmosphérique et communiquant avec l'une des ouvertures d'entrée d'air (95).
  13. Imprimante selon l'une quelconque des revendications 9 à 12, caractérisée en ce que les dispositifs d'apport d'air (108, 106, 58, 59, 95, 97, 122, 126, 128, 130, 134) comprennent un sécheur frigorifique (106) et/ou un sécheur à sorption (120) pour le séchage de l'air apporté.
  14. Imprimante selon l'une quelconque des revendications 9 à 13, caractérisée en ce que les dispositifs d'apport d'air (108, 106, 58, 59, 95, 97, 122, 126, 130, 134) comprennent un dispositif de chauffage (134) pour réchauffer l'air séché.
  15. Imprimante selon l'une quelconque des revendications 9 à 14, caractérisée en ce que des dispositifs de guidage et de transfert des feuilles (32, 38, 40, 124) de la sortie de feuilles (22) peuvent être sollicités avec l'air séché.
  16. Imprimante selon l'une quelconque des revendications 9 à 15, caractérisée par des dispositifs (58, 56, 59, 57, 66, 68) pour bloquer un courant d'air chargé d'humidité et/ou de poudre provenant de l'environnement et/ou de l'intérieur de la sortie de feuilles (22) dans la région se trouvant immédiatement derrière le dernier cylindre (16) de l'imprimante (2).
  17. Imprimante selon l'une quelconque des revendications 9 à 16, caractérisée en ce que la quantité de l'air apporté dans le boítier (24) dépend de la vitesse de déplacement du dispositif de transport de feuilles (20).
  18. Imprimante selon l'une quelconque des revendications 9 à 17, caractérisée par un dispositif d'aspiration d'air (56) disposé dans une partie horizontale de la sortie de feuilles (22) au-dessus de la face supérieure des feuilles.
EP99911701A 1998-02-25 1999-02-24 Procede et machine d'impression offset Expired - Lifetime EP1066160B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19807690 1998-02-25
DE19807690 1998-02-25
DE19852714 1998-11-16
DE19852714 1998-11-16
PCT/EP1999/001181 WO1999043501A1 (fr) 1998-02-25 1999-02-24 Procede et machine d'impression offset

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DE10161267B4 (de) * 2001-12-13 2007-08-09 Koenig & Bauer Aktiengesellschaft Einrichtung zur Puder- und Warmluftabsaugung im Ausleger einer Bogenrotationsdruckmaschine
DE10161269B4 (de) * 2001-12-13 2005-03-17 Koenig & Bauer Ag Ausleger einer Bogenrotationsdruckmaschine
DE10227242A1 (de) * 2002-06-19 2004-02-05 Koenig & Bauer Ag Anordnung zum Pudern von Flächengebilden in einer Druckmaschine
DE102004054386C5 (de) * 2003-12-01 2018-10-25 Heidelberger Druckmaschinen Ag Verfahren zum Schutz einer Kettenführung einer Druckmaschine vor dem Eindringen von Puder
CN104890364B (zh) * 2015-06-08 2017-03-08 温州顺威包装有限公司 一种雪花光固机
CN113022099B (zh) * 2021-02-26 2022-08-26 重庆市金利药包材料有限公司 一种药用包装袋生产装置

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US4012847A (en) * 1975-11-24 1977-03-22 Autosonics Inc. Solvent recovery system
US4341167A (en) * 1980-10-29 1982-07-27 St John Eric P Energy conserving heating and cooling system for printing plant
JPH04284250A (ja) * 1991-03-12 1992-10-08 Kinki Seiko Kk 印刷物表面の水性ニス層の乾燥装置
EP0723128A1 (fr) * 1995-01-23 1996-07-24 Armin Schneider Procédé de durcissement soit des teintures soit des vernis aqueux ou contenant des solvants organiques sur des objets
US5832833A (en) * 1995-07-25 1998-11-10 Burgio; Joseph Thomas Apparatus and method for drying a substrate printed on a multi-stand offset press

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DE59903974D1 (de) 2003-02-13
DE19908266A1 (de) 1999-09-23
EP1066160A1 (fr) 2001-01-10
WO1999043501A1 (fr) 1999-09-02

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