EP1066160A1 - Offsetdruckverfahren und offsetdruckmaschine - Google Patents
Offsetdruckverfahren und offsetdruckmaschineInfo
- Publication number
- EP1066160A1 EP1066160A1 EP99911701A EP99911701A EP1066160A1 EP 1066160 A1 EP1066160 A1 EP 1066160A1 EP 99911701 A EP99911701 A EP 99911701A EP 99911701 A EP99911701 A EP 99911701A EP 1066160 A1 EP1066160 A1 EP 1066160A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- printing
- sheet
- offset printing
- dried
- 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
-
- 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 an offset printing machine.
- the difference to drying many other printing inks is not based on the evaporation of a solvent, but on the one hand on a physical drying process by knocking it out, i.e. penetration of binder components into the printing material, as well as a chemical drying process by oxidation, i.e. crosslinking of binder components by absorbing atmospheric oxygen.
- UV drying which is mainly used in sheetfed offset printing
- the printing ink is irradiated with UV light using ultraviolet light, whereby photoinitiators contained in the binding agent of the printing ink disintegrate into radicals.
- UV drying which is also mainly used in sheetfed offset printing, the printing material is irradiated with IR emitters in the short-wave and medium-wave range after printing, which increases the temperature of the printing material and the printing ink and thereby eliminates the need for special printing inks as well as accelerating chemical drying.
- IR drying is also mainly used in sheetfed offset printing, the printing material is irradiated with IR emitters in the short-wave and medium-wave range after printing, which increases the temperature of the printing material and the printing ink and thereby eliminates the need for special printing inks as well as accelerating chemical drying.
- IR drying are the strong heat generation, the even higher energy consumption compared to UV drying and relatively high investment costs. In addition, heating of the substrate can lead to dimensional changes and possible register differences.
- Hot air and / or gas flame drying is used in particular in web offset printing in conjunction with so-called heat set printing inks, which are dried by evaporating the solvents.
- the substrate is passed through a dryer, in which heated air is fed from nozzles at high pressure and speed, so that
- German Patent 436 933 It is also known from German Patent 436 933 to dry printed products by means of air, which are first used for
- the object of the invention is to improve the abrasion resistance of the printing inks in an offset printing method and an offset printing machine without the aforementioned disadvantages of the known drying methods and to reduce the time until possible further processing of the printing material.
- 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 significantly changed . In this way, changes in dimension and / or blistering can be avoided in the case of heavily coated papers.
- the measures according to the invention make it possible, when used in a delivery of a sheet-fed offset printing machine, to dry the printing ink so far in the relatively short period of time between the exit of the sheets from the last printing unit and their depositing on the sheet deposit stack that an immediate changeover is possible and considerable shortened waiting time until further processing can be achieved.
- printing method according to the invention and the printing machine according to the invention can be used particularly advantageously in sheet-fed offset printing, use in web-offset printing is also possible if printing inks are used there, the drying of which is based on a
- a preferred embodiment of the invention provides that the air for drying is passed through a refrigeration dryer in order 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 (C10) 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 Before being fed into the vicinity of the printing material, the air is expediently warmed somewhat, in particular after cold drying, the temperature of which, when coming into contact with the printing material, is preferably between 30 and 40 degrees, so that no thermal insulation of the sheet delivery from the environment is required.
- a further advantageous embodiment of the invention provides that the supplied dry air after its contact with the printing material and thus after the absorption of moisture is at least partially sucked off by a suction device, which is preferably arranged in sheet-fed offset printing in the horizontal section of the sheet delivery above the conveyor run of the chain boom is.
- the supply of the dried air in the vicinity of the printing material is preferably carried out immediately after the printing material exits the last printing unit of the printing press, the dried air being able to serve both for intermediate drying after one-sided printing and for the final drying of the printing material printed on both sides.
- air that has already been dried between two printing units of the printing press can also be directed into the vicinity of the printing material, in order to provide one after each inking and dampening solution application to achieve superficial drying of the applied ink and substrate.
- a particularly preferred embodiment of the invention provides that previously dried air is applied to at least part of the compressed-air sheet guiding devices present in the sheet delivery of the sheet-fed offset printing press.
- Such sheet guiding devices comprise, for example, sheet guide plates which are pressurized with air and from which the air flows against the sheets from below, guide bar blowers, blowing air nozzles in front of the sheet brakes or blowing air rakes above the sheet exit opening.
- the dried air or a part thereof can be blown into a housing of the sheet delivery by means of additionally provided nozzles, preferably at least partially into the space between an upper empty strand and a lower conveying strand of a conveying device arranged inside the housing, which converts the printed sheets into one Sheet storage stack transported.
- the dried and preferably also filtered air which is thus freed from moisture as well as from powder or other dust-like pollutants, is selectively fed from the outside into the housing of the sheet delivery and transported into the area immediately behind the printing press, while at the same time an inflow of ambient air and / or air contaminated with moisture and powder from the interior of the delivery into this area is prevented.
- the air is preferably fed into the housing at a distance from the printing press and transported to the printing press by the suction of an empty run of the sheet conveying device, as a result of which a change in the flow conditions immediately behind the printing press can be avoided.
- the flow of ambient air through a closed housing wall behind the printing press can be prevented Influx of polluted air from the inside of the sheet delivery can be prevented if an air flow running along the empty run of the conveyor in the direction of the printing machine is interrupted in the direction of movement of the empty run before the point at which the dried air is fed into the housing.
- the pre-dried air supplied can absorb more moisture than undried air sucked in from the surroundings of the sheet delivery or printing machine, as a result of which the moisture content in the stack can be kept essentially unchanged before and after printing without additional measures.
- a further preferred embodiment of the invention provides that the pre-dried air at one or more points between the interruption point or the powder apparatus and the delivery drum in the housing of the sheet delivery and expediently supplied in the vicinity of the movement path of an empty strand of the chain conveyor and by its suction is transported in the direction of the printing press.
- the air flowing along the empty run of the chain conveyor to the delivery drum is there together with the chain conveyor 8th
- the supplied air has a very low absolute humidity when it hits the surfaces of the freshly printed sheets on the delivery drum, there is an abrupt evaporation of the surface water and a thin, dried film quickly forms on the surface of the printing ink further transport of the sheets counteracts smearing of the paint and adhesion of powder to the surface. Due to the immediate evaporation, few beats on the unprinted areas of the sheet
- a nozzle box possibly equipped with brushes, arranged above the empty run, from which clean, dried air is blown downwards in the direction of the empty run, one below the nozzle box in
- the space between the empty run and the conveyor run possibly equipped with brushed air suction and deflection trough, which sucks some of the air or deflects it in the direction of the printing press, as well as one in the running direction of the empty run behind the nozzle box and the Trough arranged air storage device, from which air dried by the negative pressure generated and not contaminated with powder is sucked into the housing of the sheet delivery.
- the air reservoirs and the nozzle boxes are preferably connected to a refrigeration and / or sorption dryer in which the air compressed by a compressor of the printing press is dried with the removal of moisture.
- Facilities i.e. Nozzle box, tub and air storage, only one air storage each to be provided on the top of the housing, so that, if necessary, additional dried air can be sucked into the housing of the sheet delivery by the suction of the empty strand.
- the spread of pollutants along the empty run in the direction of the printing press can also be prevented behind the interruption point by a partition arranged between the empty run and the conveyor run, preferably running from the interruption point to the printing press.
- the air storage can be kept under a slight excess pressure, so that the air is always fed into the interior of the sheet delivery.
- the air inside the air accumulator is preferably under atmospheric pressure. According to a further preferred embodiment or alternative of the invention, this enables simple control of the air supply as a function of the printing speed, because higher printing speeds necessitate higher running speeds of the sheet conveying device, which in turn causes a stronger suction effect, through which more air is drawn in from the air storage.
- a further preferred embodiment of the invention provides for the air drying device under the
- the air for final drying of the printed web is preferably blown onto the web from above and below immediately behind the last printing unit, preferably before the web passes through a hot air or gas flame dryer, the supply of the dried air supplying the energy required for the Hot air drying significantly reduced.
- a hot air or gas flame dryer it is also conceivable to provide only a warm air dryer in the place of a hot air dryer behind the printing units, in which the web is subjected to warm air which has been dried beforehand.
- FIG. 2 shows an enlarged, partially sectioned side view of the sheet delivery of the printing machine from FIG. 1;
- FIG. 7 shows a schematic, partially sectioned side view of a drying device arranged between a web offset printing press and a downstream hot air or gas flame dryer.
- paper sheets 1 are transferred one after the other by means of an automated sheet feeder 4 from a paper stack 8 arranged in a sheet feeder 6 of the printing press 2 to a feed drum 10 of a first printing unit 12 and then through the first printing unit 12 and possibly further of the total of eight printing units (only two shown) are transported in order to print them on one or both sides in one or more colors.
- Delivery gripper systems 18 of a chain conveyor 20 of a sheet delivery of the printing press 2 take over the printed sheets 1 from a counter-pressure cylinder 16 of the last printing unit 14 and transport them through a housing 24 of the latter
- the chain conveyor 20 essentially consists of two parallel chains (not shown) which are guided in opposite lateral guide rails and which are connected at regular intervals by the gripper systems 18, which are also referred to as curved grippers.
- the chain conveyor 20 has a lower conveying run (leading system) 30 which transports the sheets and which moves obliquely upwards from two sprockets of a delivery drum 32 and is then deflected into the horizontal before two drive sprockets 34 at the free end of the sheet delivery 22 reached. His upper empty strand (retreating 12
- each sheet 1 is passed in the direction of movement of the conveyor run 30 by sheet guide plates 38 without contact past laterally adjustable guide bar blowers 40 and over a sheet brake 42 arranged behind it, and then reaches a sheet outlet opening 44 on the underside of the horizontal section of the housing 24 Sheet delivery 22.
- the sheets transferred and braked by the grippers 18 to the sheet brake 42 are blown downward onto the sheet deposit stack 26 with the aid of a plurality of delivery fans 46 arranged above the outlet opening 44. This rests on a lifting mechanism 48 which lowers the stack 26 synchronously with the speed of the sheet feed.
- a powder apparatus 50 is arranged in the space 52 between the conveyor run 30 and the empty run 36.
- the powder apparatus 52 dustes the upper sides of the pressurized sheets held by the sheet grippers 18 of the conveyor strand 30 with a fine powdered starch powder
- a nozzle box 58 is arranged above the empty strand 36, which is provided on its underside with a large number of air outlet nozzles through which air which has not been loaded with powder and is dried beforehand is blown into the housing 24.
- a combined air suction and deflection trough 56 is arranged in the intermediate space 52 between the conveying strand 30 and the empty strand 36, which serves to suck off part of the air blown in together with the powder cleaned from the empty strand 36 and the rest of the air to redirect towards the press.
- the air suction and deflection trough 56 consists essentially of a thin-walled flat housing which is provided on its top and bottom with slot-shaped air intake openings and extends below the lateral guides of the empty run 36 over the entire clear width of the sheet boom.
- the housing forms a continuous closed
- Partition wall between a flow path along the conveyor run 30 and a flow path along the empty run 36. This partition wall 56 prevents the passage of air from top to bottom and vice versa over its entire extent.
- the inside of the housing is connected to a suction blower via control valves for controlling the extracted air quantities and the negative pressure applied, which is preceded by a dust separator with a centrifuge and a fine filter (not shown).
- Two rows of brushes 66, 68 are further arranged between the underside of the nozzle box 58 and the top of the air suction and deflection trough 56, which extend over the entire clear width of the sheet boom from above and from below into the path of movement of the empty strand 36 . 14
- 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 filter the particles into the
- Nozzle box 58 to make air supplied 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 is one
- Residual water content (absolute humidity) of about 1 g / m 3 .
- the cold dryer 106 is connected to the sheet guide plates 38 via a further controllable throttle valve 116, the line not being shown. That is, the
- Sheet guide plates 38 are acted upon by dried air, which emerges from a large number of air outlet nozzles on the top side of the plates 38.
- the guide bracket blowers 40 can also be connected to the refrigeration dryer 106 via a controllable throttle valve 118, so that dried air is also used for aligning the sheets, and the moisture content of the air within the housing 24 is thus 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 tub 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 supplied at a relatively low pressure of 1.5 to 2 bar, while the air pressure is increased to 3 to 3.5 bar during a subsequent cleaning of the sheet delivery 22.
- 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 past the sheet grippers 18 and past the chains of the chain conveyor 20, these being showered off by the air and adhering powder particles being carried downward, so that they do not move any further from the empty run 36 in the direction of the printing press 2 can be transported.
- Chain conveyor 20 clean and saturated with fat, so that powder-related wear can be prevented.
- the downward flow of air together with the two brushes 66, 68 forms a barrier in this area of the sheet delivery 22 between a closed housing cover on the top and the trough 56 on the underside, which prevents air laden with powder and moisture along the Empty run 36 flows in the direction of the printing press 2.
- a portion of the air deflected at the top of the tub 56 in the direction of movement of the empty strand 36 is deflected downward by the suction of air at the rear edge and on the underside of the tub 56, this air being partially sucked off and partially up through air suction openings provided there the front of the powder apparatus 50 facing away from the printing machine 2 flows downward. Another part of the deflected air is guided by the suction of the empty run 36 above the powder apparatus 50 in the direction of the printing press 2.
- a ventilation grille 95 is arranged at the upper end of the inclined section of the housing 24 above the empty run 36, through which air can enter the interior of the housing 24 from the outside. Most of this air is carried along by the suction of the empty run 36 in the direction of the printing press 2, while a smaller part flows downward behind an air suction pipe 75 acting as an air switch and down the tub 56 and along the back of the powder apparatus pointing in the direction of the printing press 2 50 to the top of the sheet transported past.
- Powder apparatus 50 air currents help to convey the powder down to the arches and to prevent whirling up and spreading of whirled up powder.
- An air accumulator 97 is arranged above the ventilation grille 95, and pre-dried air is supplied from the refrigeration dryer 106 via a pressure control valve 109 and is then sucked through the ventilation grille 95 instead of ambient air.
- the air in the air reservoir 97 is kept under atmospheric pressure, so that more or less dried air is fed into the interior of the housing 24 depending on the level of the negative pressure generated by the empty run 36 of the chain conveyor 20. Since the level of the negative pressure increases with the running speed of the chain conveyor 20, simple control of the air supply depending on the printing speed can be achieved in this way. 17
- Chain conveyor 20 parallel partition 99 may be arranged, which prevents a reversal of the air flow before reaching the delivery drum 32.
- the partition 99 can extend as far as the rear outer edge of the tub 56 in order in this way to prevent powder from entering the powder-free air that is blown or sucked in above the powder apparatus 50.
- the extended sheet delivery 22 shown in FIG. 5 also has a further nozzle box 59 in front of the air accumulator 97 and one below the nozzle box in the direction of movement of the empty strand 36 58 between the empty strand 36 and the conveying strand 30 arranged air suction and deflection trough 57, the structure and function of which essentially corresponds to that of the nozzle box 58 and the air suction and deflection trough 56.
- the tub 57 is somewhat flatter than the tub 58 and is supported by the side walls of the housing 24 of the sheet delivery 22. With even longer sheet deliveries 22, two of these can also be used
- Combinations of tub 57, shower box 59 and air storage 97 may be provided.
- the delivery drum 32 Sprockets of the delivery drum 32 on the freshly printed surface of the sheets, which are pulled by the sheet grippers 18 of the chain conveyor 20 from the impression cylinder 16 of the last printing unit 14, so that the sheets are acted upon immediately after leaving the last printing cylinder 16 with the dried air.
- the delivery drum 32 is not formed by two sprockets but by a continuous drum, this is expediently designed as an air cushion drum and acted upon from the inside with pre-dried air which acts on the
- Drum circumference facing pressurized surface of the sheet hits.
- the dried air causes an abrupt evaporation of water adhering to the surface of the printing ink and the substrate.
- This surface water is found above all on the unprinted areas of the printing substrate and on those areas of the printing ink that were already applied prior to the passage through the last printing unit, because in the last printing unit, these surfaces lie opposite surfaces of the printing cylinder moistened with water-containing dampening solution, from which when peeling off of the printing material is entrained.
- smaller quantities also adhere to the printing ink applied in the last printing unit
- the water adhering to the printing ink and to the printing material is evaporated by the exposure to the dried air before it hits the printing material on the unprinted surfaces or can come into contact with powder applied to the printing ink.
- the rapid evaporation of the surface water on the one hand reduces the water absorption in the printing material and on the other hand prevents water from being absorbed on the printing ink by powder particles.
- the last-mentioned effect is particularly pronounced if, due to the interruption of the air flow along the empty run 36 of the chain conveyor 20 and / or the partition 99, the inflow of powder carried into the area between the
- Delivery drum 32 and the powder apparatus 50 is prevented, so that powder can only reach the surface of the printing material and the printing ink below the powder apparatus 50 when the surface has already dried by the supply of the dried air.
- the dry air is deflected together with the chain conveyor 20, so that after it has been fed onto the freshly printed upper side of the sheets, it is transported in cocurrent with these in the direction of movement of the conveying strand 30, with their absolute moisture due to the evaporation of the Surface water increased.
- the deflection of dry air in front of the trough 57 causes a part of the air flowing over the arch to be displayed and already loaded with moisture is replaced by dry air again.
- the moisture on the printing ink and the substrate can be quickly reduced without additional drying devices, i.e. can be evaporated within 0.1 to 0.2 seconds so that the surface of the printing ink and the printing material have already dried to the extent that the sheets pass under the powder apparatus 50 to such an extent that powder does not adhere, or only to a very small extent is coming. This gives you a high-gloss printed product with very good image quality, even with matt coated substrates.
- the measures described essentially only remove the superficial moisture supplied during printing, without the moisture content in the interior of the printing material changing significantly.
- the time to further processing can be reduced by the moisture content in the sheet deposit stack 26, which is essentially unchanged compared to the moisture content in the paper stack 8.
- the dried air transported in direct current with the conveying strand 30 of the chain conveyor 20 in the direction of the sheet depositing stack 26 forms an air cushion or air cushion after it has been brought up to and above the sheet, which contributes to calming the sheet travel.
- the air cushion can be supplemented and strengthened by supplying dried air from the sheet guide plates 38, this air supply also providing a certain drying effect on the printed underside, particularly in the case of sheets printed on both sides.
- Embodiments is in the embodiment shown in FIG. 6, the refrigeration dryer 106 21
- Sorption dryer 120 is connected downstream, in which further moisture is removed from the air pre-dried in the cold dryer 106, so that its residual water content is less than 0.1 g / m 3 .
- the sorption dryer 120 contains a highly hygroscopic medium, such as CaSO, 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 also be provided in order to also accelerate the solvent content of the air To reduce drying.
- the sheet guide plates 38 and the guide bracket blowers 40 are acted upon with dried air, but additionally also the delivery drum 32 designed as an air cushion drum, blowing air nozzles 122 arranged in front of the sheet brakes 42 and a delivery fan 46 arranged above the sheet outlet opening 44 instead of the delivery fans 46 Blown air rake 124 with downward-pointing air outlet nozzles, from which blown air is blown in a controlled manner from above onto the respective spreading sheet in order to calm it and to speed up the laying process. Furthermore, instead of the nozzle box 58 in the rising part of the sheet delivery 22 between the conveyor strand 30 and the empty strand 36 of the chain conveyor 20, three additional, in
- Blown air pipes 126, 128, 130 which are spaced apart from one another and run through the intermediate space 52 and are provided with air outlet nozzles, through which the area above the sheets carried on the conveying run 30 is acted upon by dried air.
- the delivery drum 32, the blown air nozzles 122, 126, 128, 130 and the blown air rake 124 are each connected to the sorption dryer 120 by air lines, throttle valves 140 arranged in the air lines being clocked and quantity or pressure-controlled Allow the air to be dried.
- a heat exchanger 134 is arranged between the cold dryer 106 and the sorption dryer 120, in which the compressed air cooled in the cold dryer 106 is reheated to a temperature of between 30 and 40 ° C. around it
- the heat exchanger 134 is fed with a warm heat transport medium which can be heated by the waste heat from drive motors of the printing press 2 or heated in other heat sources.
- the blown air nozzles 122, 126, 128, 130 are expediently subjected to dried air before the start of the sheet delivery 22 after a longer standstill of the printing press 2 in order to flush the housing 24, so that air which has flowed in from the environment is removed therefrom with a higher moisture content can be.
- the sheets are dried so far between their exit from the printing press 2 and their arrival on the sheet depositing stack 26 that the sheets are not deposited even without dusting with a powder.
- the sheet delivery shown in FIG. 6 therefore does not have a powder apparatus 50, which not only avoids a powder load in the interior and in the vicinity of the sheet delivery 22, but also the time to further processing can be shortened further because the 23
- Evaporation from the printing ink or the substrate is not hindered by the powder applied.
- FIG. 7 shows a device arranged between a web offset printing press 200 and a downstream hot air or gas flame dryer 202 for accelerating the drying of a paper web 204 printed in the printing press 200.
- the device arranged behind the printing press 200 comprises two nozzle boxes 206, 208, one of which is arranged below or above the paper web 204 and by means not shown in the direction of the double arrows away from the paper web 204 or in the vicinity thereof in the direction shown in FIG 10, the drying position shown can be moved, in which the outlet openings 210 of a plurality of slot nozzles 212 arranged one behind the other in the direction of movement of the web 204, ie in the direction of the arrow A, are at a very short distance from the web 204.
- the slot nozzles 212 each extend over the entire width of the web 204 and are inclined at a flat angle against the direction of movement of the web 204, so that the from the 24
- Outlet openings 210 after it strikes one of the two web surfaces are deflected away from the latter into the housing of the respective nozzle box 206, 208, from where it is sucked off through discharge channels 214, 216 opening therein.
- the slit nozzles 212 are acted upon by pre-dried air which has previously been removed from moisture in a refrigeration dryer or sorption dryer. With the aid of the drying device, printed surfaces of the web 204 can be surface dried before entering the hot air or gas flame dryer, and energy can be saved as a result.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
Abstract
Description
Claims
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 (de) | 1998-02-25 | 1999-02-24 | Offsetdruckverfahren und offsetdruckmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1066160A1 true EP1066160A1 (de) | 2001-01-10 |
EP1066160B1 EP1066160B1 (de) | 2003-01-08 |
Family
ID=26044104
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99911701A Expired - Lifetime EP1066160B1 (de) | 1998-02-25 | 1999-02-24 | Offsetdruckverfahren und offsetdruckmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1066160B1 (de) |
DE (2) | DE59903974D1 (de) |
WO (1) | WO1999043501A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113022099A (zh) * | 2021-02-26 | 2021-06-25 | 重庆市金利药包材料有限公司 | 一种药用包装袋生产装置 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 (de) * | 1995-01-23 | 1996-07-24 | Armin Schneider | Verfahren zum Härten von Farbe bzw. wässerigen oder lösungsmittelhaltigen Lacken auf Gegenständen |
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 |
-
1999
- 1999-02-24 WO PCT/EP1999/001181 patent/WO1999043501A1/de active IP Right Grant
- 1999-02-24 EP EP99911701A patent/EP1066160B1/de not_active Expired - Lifetime
- 1999-02-24 DE DE59903974T patent/DE59903974D1/de not_active Expired - Lifetime
- 1999-02-25 DE DE19908266A patent/DE19908266A1/de not_active Ceased
Non-Patent Citations (1)
Title |
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See references of WO9943501A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113022099A (zh) * | 2021-02-26 | 2021-06-25 | 重庆市金利药包材料有限公司 | 一种药用包装袋生产装置 |
Also Published As
Publication number | Publication date |
---|---|
DE19908266A1 (de) | 1999-09-23 |
EP1066160B1 (de) | 2003-01-08 |
DE59903974D1 (de) | 2003-02-13 |
WO1999043501A1 (de) | 1999-09-02 |
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