EP3693174A2 - Dispositif et procédé d'impression d'un substrat d'impression - Google Patents

Dispositif et procédé d'impression d'un substrat d'impression Download PDF

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Publication number
EP3693174A2
EP3693174A2 EP20156182.6A EP20156182A EP3693174A2 EP 3693174 A2 EP3693174 A2 EP 3693174A2 EP 20156182 A EP20156182 A EP 20156182A EP 3693174 A2 EP3693174 A2 EP 3693174A2
Authority
EP
European Patent Office
Prior art keywords
printing
print
substrate
web
movement
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
Application number
EP20156182.6A
Other languages
German (de)
English (en)
Other versions
EP3693174A3 (fr
EP3693174B1 (fr
Inventor
Maximilian Kirschbauer
Josef Michael KIRSCHBAUER
Ronny Walther
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Publication of EP3693174A2 publication Critical patent/EP3693174A2/fr
Publication of EP3693174A3 publication Critical patent/EP3693174A3/fr
Application granted granted Critical
Publication of EP3693174B1 publication Critical patent/EP3693174B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/008—Controlling printhead for accurately positioning print image on printing material, e.g. with the intention to control the width of margins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0022—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using convection means, e.g. by using a fan for blowing or sucking air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/02—Platens
    • B41J11/06—Flat page-size platens or smaller flat platens having a greater size than line-size platens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/36—Blanking or long feeds; Feeding to a particular line, e.g. by rotation of platen or feed roller
    • B41J11/42—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0085—Using suction for maintaining printing material flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/16—Means for tensioning or winding the web

Definitions

  • the invention relates to a device and a method for printing on a printing substrate.
  • the material can be provided as a continuous material on a roll.
  • provision can be made for individual sheets to be fed to the printing device one after the other in order to print the sheets individually.
  • the continuous material can be separated after printing in order to obtain individual printed sheets.
  • the document DE 10 2016 102 565 A1 discloses a method and apparatus for producing a singulated sheet for a printing device.
  • various sheet materials are provided as continuous material in magazine or buffer devices, with a transport path to a material switch, in which the transport paths converge, being located downstream of the magazine devices on the output side.
  • Transport devices are provided which are each assigned to one of the transport paths and are set up to transport the various sheet materials from the magazine device at least to the material switch. Control signals are received in the transport devices which determine a material selection corresponding to a print job for a selected one of the sheet materials.
  • the transport devices are controlled according to the control signals in such a way that the selected sheet material is transported to the material switch and in the material switch passes from the transport path into a feed path into which the transport paths open.
  • the selected sheet material is transported by means of the transport devices via the feed path from the material switch to a separating device.
  • a separated sheet is produced for subsequent printing in that the separated sheet is separated from the selected sheet material.
  • the document US 2013/088554 A1 discloses a pallet conveyor.
  • the apparatus includes a forward lane to move pallets from an upstream portion of the forward lane to a downstream part of the forward path, a return path and a pallet transfer device.
  • the pallet transfer device is configured to simultaneously (1) pick up pallets from a downstream part of the return path continuously and deliver pallets to the upstream part of the forward path and (2) continuously pick up pallets from the downstream part of the forward path and deliver pallets to an upstream part of the return path .
  • the document EP 1 890 884 B1 describes a digital printer with a digital printing unit for digitally printing an image on a printing substrate during a relative movement between a print head and the printing substrate and a printing table for holding the printing material during digital printing.
  • the printing table is firmly connected to the digital printing unit during the digital printing of the image onto the printing material and is detached from the digital printing unit before and after the digital printing of the image onto the printing substrate (3).
  • the printing table (2, 12) can be moved between a printing position, in which it is firmly attached to the digital printing unit (4, 5), and a printing substrate feed position, in which it is possible to feed and remove the printing substrate (3) from the printing table ( 2.12).
  • the document DE 10 2016 224 313 A1 relates to a device for transporting printing materials on a movable carrier in a printing machine, in which the movable carrier has a device for transmitting electrical energy from a component of the printing machine to the movable carrier.
  • the document DE 10 2012 105 338 A1 relates to a method for controlling a digital printing system for printing an endless recording medium.
  • the continuous material must be transported through the printing device or the printing system, the transport movement being coordinated with the printing process and transport through the entire printing device or the entire printing system must be ensured under suitable conditions, in particular in the area of the printing
  • the relevant components must meet the requirements that result from the printing process itself.
  • the object of the invention is to specify a device and a method for printing on a printing substrate with improved positioning of the printing substrate.
  • the positioning of the print substrate relative to a print head shuttle should be improved.
  • an apparatus for printing on a print substrate has a printhead shuttle with at least one printhead which is configured to apply a printing medium to a printing substrate in order to generate a print image, the printing substrate being a web material which can be displaced along a path in a feed direction, and the printhead shuttle on a first side of the print substrate is arranged.
  • a printing table is arranged opposite the printing head shuttle on a second side of the printing substrate.
  • the printing table has a holding device which is set up to hold the printing substrate in such a way that a relative movement between the printing table and the printing substrate is prevented for printing.
  • the print head shuttle is set up to perform a movement for printing in and against a shuttle movement direction running transversely to the feed direction of the print substrate, in such a way that the print head shuttle is positioned above the print substrate by the feed movement of the print substrate in the feed direction and the movement of the print head shuttle transversely to the feed direction to generate the print image on the print substrate.
  • a method for printing on a printing substrate comprises: applying a printing medium to a printing substrate, which is a web material which is displaceable along a web path in a feed direction, with at least one print head of a print head shuttle, which is arranged on a first side of the print substrate, for generating a print image; Holding the printing substrate with a holding device of a printing table which is arranged opposite the print head shuttle on a second side of the printing substrate, such that a relative movement between the printing table and the printing substrate is prevented for printing; and displacing the print head shuttle when the printing medium is applied to the print substrate in and against a shuttle movement direction running transversely to the feed direction of the print substrate, in such a way that the feed movement of the print substrate in the feed direction and the movement of the print head shuttle transversely to the feed direction position the print head shuttle over the print substrate to generate the print image on the print substrate.
  • the print substrate can be printed in particular by means of the print head shuttle while it rests on the print table and is held by the holding device.
  • the positioning can be improved.
  • the relative positioning takes place in a longitudinal direction, i. parallel to the feed direction, by displacing the print substrate, and the relative positioning in a transverse direction, i.e. across the feed direction, by moving the print head shuttle.
  • the print substrate is advantageously only moved in the feed direction, while the print head shuttle is moved back and forth transversely to the feed direction.
  • the print head shuttle can be set up to execute a movement in and against a parallel shuttle movement direction running parallel to the feed direction of the printing substrate.
  • the print head shuttle is displaced not only in the transverse direction but also in the longitudinal direction.
  • the movement of the print head shuttle in the longitudinal direction can be coordinated with the feed movement of the print substrate; in particular, the displacement of the print head shuttle in the longitudinal direction and the feed movement of the print substrate can take place at the same speed, so that when the print head shuttle is displaced transversely to the feed direction, printing takes place during the feed movement can.
  • the printing table can be set up to carry out a feed movement while the holding device holds the print substrate in such a way that the feed movement is transferred to the print substrate and the printing table causes a feed movement of the print substrate along the path of the web.
  • the holding device can further be set up to hold the print substrate during a feed movement of the print substrate in such a way that a relative movement between the printing table and the print substrate is prevented during the feed movement. This improves the transport if a relative movement between the printing table and the printing substrate is prevented not only during the printing but in particular also during the feed movement by means of the printing table.
  • the printing table can in particular be set up to move the web material in a feed direction through the printing device, the printing table being movable in the feed direction as well as against the feed direction. While the web material is held on the printing table by means of the holding device, the printing table moves in the feed direction from a rear position to a front position and thus pulls the web material, for example from a roll, in the feed direction through the printing device. The holding device can then release the web material so that it is released from the printing table. The printing table can then move past the web material from the front to the rear position counter to the feed direction. Subsequently, a contact with the web material can be established again by means of the holding device, whereupon the movement of the printing table in the feed direction is repeated.
  • the holding device can comprise a vacuum device which sucks the printing substrate onto the printing table by means of a negative pressure or a vacuum.
  • the vacuum device can generate a negative pressure and be connected to the environment via channels with a support surface of the printing table, so that the printing substrate is sucked onto the supporting surface of the printing table by means of the negative pressure in order to hold the printing substrate.
  • At least a section of the printing table which comprises the support surface can be made of a porous material, the channels which connect the vacuum device to the support surface being provided by the porosity of the material.
  • the printing table can have a heating device which brings the support surface of the printing table to a predetermined temperature.
  • the printing substrate arranged on the support surface can be brought to a predetermined printing temperature.
  • the heating device can suitable means for heating the Include support surfaces, such as electrical heating elements, openings for warm air, etc.
  • it is preferred to uniformly heat the support surface at least in the area in which the printing substrate is supported.
  • the heating of the plastic printing substrate can lead to expansion of the printing substrate and thus possibly to the formation of wrinkles. Therefore, independently of the heating device, a smoothing device can be provided, for example in the form of a brush, which smooths the print substrate with the first pressure movement of the print head shuttle.
  • the web material can be a film material.
  • the film material can be a plastic film material, for example made of polycarbonate (PC) or polyvinyl chloride (PVC).
  • the sheet material can be a thin sheet material.
  • the thin sheet material can have a material thickness of 100 ⁇ m or less.
  • the sheet material can have a thickness of 75 ⁇ m.
  • the web material can be provided with a width which corresponds to a desired width of the print image, possibly plus any necessary side margins.
  • the web material can be provided with a width of 300 mm to 600 mm.
  • a storage device can be provided from which the web material is fed to the printing process.
  • the device can comprise a supply roll on which the web material is rolled up and from which the web material is pulled during operation.
  • the device can furthermore have a first web tension measuring device, which is arranged along the web path in front of the printing table and is configured to generate first measurement data which indicate a mechanical web tension of the printing substrate on the first web tension measuring device, a first tensioning device which is arranged along the web path in front of the printing table and is set up to set a mechanical web tension of the printing substrate, a second web tension measuring device which is arranged along the web path after the printing table and is set up to generate second measurement data which indicate a mechanical web tension of the printing substrate on the second web tension measuring device, and a second tensioning device which runs along of the web path is arranged after the printing table and set up to set a mechanical web tension of the printing substrate, as well as a control device.
  • a first web tension measuring device which is arranged along the web path in front of the printing table and is configured to generate first measurement data which indicate a mechanical web tension of the printing substrate on the first web tension measuring device
  • a first tensioning device which is arranged along the web path in front of the printing table and
  • the control device can be set up to receive the first measurement data, to generate first control data based on the first measurement data and to control the first tensioning device in accordance with the first control data, in such a way that the first tensioning device has a first predetermined web tension of the printing substrate on the first Tensioning device causes and receiving the second measurement data, generating second control data on the basis of the second measurement data and controlling the second tensioning device in accordance with the second control data, such that the second tensioning device causes a second predetermined web tension of the printing substrate on the second tensioning device.
  • the control device can be configured to keep the web tension of the print substrate constant along the web path in front of the printing table and to keep the web tension of the printing substrate constant along the web path behind the printing table during a printing process. Constant printing conditions can thus be ensured, in which the web tension in front of the printing table and the web tension behind the printing table remain constant.
  • the device may comprise a rejection device.
  • the separating device can comprise a testing device, a packaging device and a document switch.
  • the test device can be formed with an image recording device and set up to record an image of the print image on the web material, to compare the recorded image of the print image on the web material with comparison image data, to determine the print image as a correct print image if based on the comparison of the print image a correspondence between the print image and the comparison image data is determined on the web material with the comparison image data, and to determine the print image as an incorrect print image if, based on the comparison of the print image on the web material with the comparison image data, there is no correspondence between the print image and the comparison image data is determined.
  • the assembly device can be configured to assemble the web material into individual sheets and the document switch can be configured to guide a made-up sheet onto one of a first transport path and a second transport path, a made-up sheet with a print image which is defined as a correct print image is directed to the first transport path and a made-up sheet with a print image, which was determined to be an incorrect print image, is directed to the second transport path.
  • a waste device can be arranged along the second transport path, which destroys a finished sheet with a print image which was determined to be an incorrect print image. This allows reuse of the prepared sheet with a print image that was determined to be an incorrect print image can be excluded. Alternatively or additionally, sensitive data can be made unrecognizable.
  • the waste device can be a cutting device which cuts the finished sheet with a print image that has been determined to be an incorrect print image.
  • the cutting device can cut the sheet into strips. Parameters of the cutting device can be adjustable. For example, a strip width of the cut strips can be adjustable.
  • the destroyed sheet for example the strips into which the sheet was cut, can be collected in a reject bin.
  • the second transport route can lead into the reject bin.
  • the Fig.1 shows a printing device for printing on a printing substrate.
  • the printing substrate is a web material 1 on a roll 2, which serves as a storage device for the web material 1.
  • the web material 1 can be a plastic film.
  • the web material 1 is a polycarbonate film with a thickness of 75 ⁇ m and a width of 600 mm.
  • the web material can consist of another material, for example PVC, have a greater or lesser thickness, for example 100 ⁇ m, and / or have a smaller or greater width, for example 300 mm.
  • the web material is moved by means of a printing table 3 in a feed direction 4 through the printing device.
  • the printing table 3 can be moved in the feed direction 4 and against the feed direction 4.
  • the printing table 3 is designed as a coherent unit or it moves at least as a unit in order to support a uniform advance of the web material 1 over the width of the web material 1.
  • the printing table 3 has a holding device by means of which the web material 1 is held. While the web material 1 is held on the printing table 3 by means of the holding device, the printing table moves in the feed direction 4 from a rear position to a front position and thus pulls the web material 1 from the roll 2 in the feed direction 4 through the printing device. The holding device then releases the web material 1 so that it is released from the printing table 3.
  • the printing table 3 then moves against the feed direction 4 past the web material 1 from the front to the rear position and then forms contact again with the web material 1 by means of the holding device, whereupon the movement of the printing table 3 in the feed direction 4 is repeated. A discontinuous advancement of the web material 1 through the printing device is thus provided.
  • additional drive mechanisms can be provided which support the movement of the web material 1 provided by means of the printing table 3.
  • driven rollers over which the web material 1 runs and which support the web material 1, can be arranged along a path of the web material 1 in front of and / or behind the printing table 3.
  • a supporting drive mechanism can be arranged along the path of the web material 1 behind the printing table 3 in order to support a movement of the web material 1 away from the printing table 3.
  • a printing head shuttle 5 is arranged on a side of the web material 1 opposite the printing table 3.
  • the print head shuttle 5 is arranged opposite the printing table 3 with respect to the web material 1 in such a way that the web material 1 runs between the printing table 3 and the print head shuttle 5 so that it can be printed by means of the print head shuttle 5 while it is resting on the printing table 3 and by the holding device is held.
  • the printing table 3 moves the web material past the print head shuttle 5 in the feed direction 4. During the movement of the web material, the print head shuttle 5 prints the web material 1.
  • the web material 1 runs over several deflection rollers 6, by means of which the web material 1 is deflected within the printing device.
  • the web material also runs over web tension measuring rollers 7, by means of which a web tension of the web material 1 is measured.
  • a first web tension measuring roller 7a is arranged along the web path of the web material 1 in front of the printing table.
  • the first web tension measuring roller 7a thus measures the web tension of the web material 1 in front of the printing table 3.
  • a second web tension measuring roller 7b is arranged along the path of the web material 1 behind the printing table.
  • the second web tension measuring roller 7b thus measures the web tension of the web material 1 behind the printing table 3.
  • the web tension of the web material 1 causes a respective force on the axes of the web tension measuring rollers 7a, 7b.
  • the respective force on the axis of the web tension measuring rollers 7a, 7b is measured by means of a respective sensor device 8a, 8b of the web tension measuring rollers 7a, 7b.
  • the respective sensor device 8a, 8b of the first 7a and the second 7b web tension measuring roller generates first and second measurement data, respectively, which indicate the respective web tension of the web material 1 on the first web tension measuring roller 7a and on the second web tension measuring roller 7b, respectively.
  • the web material runs over so-called dancers 9. These are rollers which are movably arranged in order to set a tension of the web material 1.
  • dancers 9 are rollers which are movably arranged in order to set a tension of the web material 1.
  • a first dancer 9a can be seen along the path of the web material 1 in front of the printing table.
  • the first dancer 9a is movable up and down in the example shown, a downward movement of the first dancer 9a leading to an increase in the tension of the web material 1 and an upward movement of the first dancer 9a to a reduction in the tension of the web material 1 leads.
  • the web tension of the web material 1 in front of the printing table 3 can thus be adjusted by means of the first dancer 9a.
  • a second dancer 9b is arranged along the path of the web material 1 behind the printing table.
  • the second dancer 9b is also movable up and down, with a movement of the second dancer 9b downward leading to an increase in the Tension of the web material 1 leads and an upward movement of the second dancer 9b leads to a reduction in the tension of the web material 1.
  • the web tension of the web material 1 behind the printing table 3 can be adjusted by means of the second dancer 9b, which is independent of the web tension in front of the printing table 3 at least while the web material 1 is being held by the holding device on the printing table 3.
  • a control device 10 is connected to the web tension measuring rollers 7a, 7b and the dancers 9a, 9b (not shown) and is set up to receive the first and the second measurement data from the web tension measuring rollers 7a, 7b.
  • the first measurement data are compared with a first predetermined web tension.
  • the first predetermined web tension indicates a desired web tension of the web material 1 along the web path of the web material 1 in front of the printing table.
  • the control device 10 generates first control data corresponding to the comparison result, which are transmitted to the first dancer 9a and lead to a movement of the first dancer 9a.
  • the first control data indicate a small downward movement of the first dancer 9a if the comparison shows that the web tension of the web material on the first web tension measuring roller 7a deviates by a small difference downwards from the first predetermined web tension and the first control data give a larger one Movement of the first dancer 9a upwards when the comparison shows that the web tension of the web material on the first web tension measuring roller 7a deviates by a greater difference upwards from the first predetermined web tension.
  • the control device 10 is further set up to compare the second measurement data with a second predetermined web tension.
  • the second predetermined web tension indicates a desired web tension of the web material 1 along the web path of the web material 1 behind the printing table.
  • the control device 10 generates second control data corresponding to the comparison result, which are transmitted to the second dancer 9b and lead to a movement of the second dancer 9b.
  • the second control data indicate a small downward movement of the second dancer 9b if the comparison shows that the web tension of the web material on the second web tension measuring roller 7b is a small difference downwards from the second predetermined Web tension deviates and the second control data indicate a greater upward movement of the second dancer 9b if the comparison shows that the web tension of the web material on the second web tension measuring roller 7b deviates upwards by a greater difference from the second predetermined web tension.
  • the web tension in front of and behind the printing table 3 can be continuously monitored by repeatedly receiving first and second measurement data and generating corresponding first and second control data. In this way, regulation of the web tension in the printing device can be provided along the path of the web material 1 both in front of and behind the printing table 3.
  • the first and second predetermined web tension can be the same and the web tension of the web material 1 both in front of and behind the printing table 3 can be regulated in such a way that the same web tension of the web material 1 is achieved within a predetermined permissible deviation in front of and behind the printing table 3.
  • the Fig. 2 shows an arrangement of a printing table 3 in a printing device on which a web material 1 is arranged.
  • the web material 1 is moved during a movement of the printing table 3 in a feed direction 4 (from the drawing plane of the Fig. 2 out) held on the printing table 3 by means of a holding device, so that the web material 1 is moved along the feed direction 4 through the printing device.
  • the holding device is provided with a vacuum device 11.
  • the vacuum device 11 generates a negative pressure.
  • the vacuum device 11 is connected to the environment via channels 12 to a support surface 13 of the printing table 3.
  • the web material 1 rests on the support surface 13 of the printing table 3.
  • the vacuum device 11 generates a negative pressure during the movement of the printing table 3 in the feed direction 4, so that the web material is sucked into the support surface 13 via the channels 12 and thus held on the printing table 3.
  • the bearing surface 13 consists of a porous material with a defined porosity, which is connected to the vacuum device 11.
  • the porosity of the material of the bearing surface 13 provides undefined channels 12 which, due to the defined porosity, lead to a uniform suction and holding of the web material 1 on the bearing surface 13.
  • the channels 12 can be provided, for example, with a defined grid of bores, for example micro-bores, in order to ensure that the web material 1 is evenly sucked in and held on the support surface 13.
  • the bearing surface 13 of the Printing table 3 designed as a contiguous area. Interruptions in the support surface 13 can be provided. However, it is advantageous if the printing table 13 forms a unit and thus the support surface 13 is also moved as a coherent unit.
  • the holding device cannot be provided as a vacuum device 11.
  • the holding device can be provided by means of one or more grippers which grip the web material 1 and hold it on the support surface 13 of the printing table 3.
  • the print head shuttle 5 prints the web material 1 with a printing medium.
  • the print head shuttle has one or more print heads 14.
  • the print head shuttle 5 has two print heads 14a, 14b.
  • a printhead 14 can comprise a nozzle or a nozzle row with a plurality of juxtaposed nozzles.
  • the pressure medium can be ejected in droplets through the nozzles.
  • one print head 14 can be used for each desired color or material to be applied.
  • the print heads 14 are selectively activated in order to selectively apply printing medium to the web material 1 and thus generate a desired print image on the web material.
  • the print head shuttle 5 moves back and forth transversely to the feed direction 4 of the web material 1, so that the print heads 14 move over the web material 1.
  • the movement of the printing table 3 along the feed direction 4 thus results in a relative movement of the web material 1 to the print heads 14 in a first printing direction and the movement of the print head shuttle 5 transversely to the feed direction 4 causes a relative movement of the web material 1 to the print heads 14 in a second Provided printing direction which runs transversely to the first printing direction.
  • the printing table 3 according to FIG Fig. 2 a heater 15.
  • the support surface 13 of the printing table 3 is set to a predetermined Temperature brought.
  • the web material 1 arranged on the support surface 13 is heated to a printing temperature for printing.
  • the print head shuttle 5 also has a smoothing device.
  • the smoothing device is a brush 16 which extends along a longitudinal direction which runs parallel to the feed direction 4.
  • the brush 16 as a functional part of the smoothing device is thus elongated in the longitudinal direction, parallel to the feed direction. So it has a greater extent in the longitudinal direction than in other directions.
  • the smoothing device can thus have a smoothing effect when moving across the web material 1 transversely to the feed direction 4.
  • the brush 16 is as in FIG Fig. 2 shown, based on the direction of movement of the print head shuttle 5 arranged laterally on the print head shuttle 5.
  • the brush 16 is movable up and down relative to the print head shuttle 5 between a first and a second position.
  • the brush 16 comes into contact with the support surface 13, so that when the pressure shuttle 5 moves transversely to the feed direction 4, the brush 16 sweeps over the web material 1 arranged on the support surface 13 of the printing table 3.
  • the brush 16 is arranged above the printing table 3 in such a way that the brush 16 touches neither the printing table 3 nor the web material 1 when the printing head shuttle 5 moves.
  • a connection between the web material 1 and the support surface 13 is formed by means of the vacuum device 11.
  • Brush 16 arranged on the left side of the print head shuttle 5 is brought into the first position while the print head shuttle 5 is in a first position in which the print head shuttle 5 and the brush 16 are arranged to the right of the printing table 3.
  • the brush 16 brushes over the web material 1 and thus smooths wrinkles and / or bubbles in the web material 1 during the formation of the contact between the support surface 13 and the web material 1 and / or during the heating of the web material 1 by means of the heating device 15.
  • the brush 16 After the brush 16 has been moved over the entire width of the web material 1, the brush 16 is brought into the second position. During subsequent movements of the pressure head shuttle 5, during the movement of the printing table 3 from the rear to the front position, the brush 16 thus does not come into contact with the web material 1. After releasing of the web material 1 from the printing table 3 and the movement of the printing table 3 from the front to the rear position, a connection is again established between the web material 1 and the support surface 13 and the brush 16 is moved into the first position. Thus, after each contact is made with the support surface 13 of the printing table 3, the web material is smoothed by the brush 16 during the first subsequent movement of the print head shuttle 5 over the web material 1.
  • the brush 16 has a length which corresponds at least to the length of the support surface 13 of the printing table 3.
  • the length of the brush 16 can be greater than a length of the print head shuttle 5, which can be shorter than the length of the support surface 13. This ensures that the web material 1 is smoothed by the brush 16 over the entire length on which there is contact is made to the support surface 13 of the printing table.
  • a capping station 17, which prevents the print heads 14 from drying out, can optionally be provided.
  • the print head shuttle 5 When the printing device is not in use, the print head shuttle 5 is moved into a position in which the print heads 14 are shielded from the environment by the capping station 17 and thus the print heads 14 are prevented from drying out due to the evaporation of solvent in the printing medium.
  • a pressure medium container 18 can optionally be provided for cleaning and / or preparing the print heads 14 for a printing process. The print head shuttle can be moved into a position in which the print heads 14 are located above the pressure medium container 18.
  • pressure medium can be ejected from the print heads 14 into the pressure medium container 18 in order to free the print heads 14 of impurities and / or pressure medium residues and / or to remove air from transport paths of the pressure medium in the print heads 14.
  • drying devices 19a, 19b are shown along the path of the web material 1 behind the printing table 3 and in the area of the second web tension measuring roller 7b and the second dancer 9b.
  • the printing medium is dried on the web material 1 by means of the drying devices 19a, 19b.
  • the drying devices 19a, 19b can be hot air blowers and / or UV radiators. Different drying devices 19a, 19b can be provided.
  • the Fig. 3 shows further configuration options of a printing device. This can, for example, the printing device from the Fig. 1 be. Alternatively, the design options according to the Fig. 3 in a different printing device than the printing device according to FIG Fig. 1 be provided.
  • a printed image testing device 20 is arranged along the path of movement of the web material 1 behind the second dancer 9b and the drying devices 19a, 19b.
  • the printed image checking device 20 has an image recording device 21 which is set up to record an image of the printed image on the web material 1.
  • the recorded image of the print image on the web material 1 is compared with comparison image data, which can be, for example, print job data of a print job for printing the print image.
  • the print image is determined to be a correct print image. If no correspondence is found between the print image and the comparison image data based on the comparison of the print image on the web material 1 with the comparison image data, the print image is determined to be an incorrect print image.
  • a correspondence between the print image and the comparison image data is established when the recorded image of the print image on the web material 1 corresponds to the comparison image data within predetermined limits. If the recorded image of the print image on the web material 1 does not correspond to the comparison image data within the predetermined limits, no correspondence is established between the print image and the comparison image data.
  • the comparison of the recorded image with the comparison image data can be, for example, a pixel comparison and / or a comparison of characteristic values of the recorded image, for example a contrast value.
  • a roller drive 22 is arranged along the movement path of the web material 1 behind the testing device 21.
  • a further dancer 9c for controlling the web tension of the web material 1 is arranged behind the roller drive 22.
  • the further dancer 9c can, for example, be controlled by the control device 10 in accordance with the second sensor data.
  • a further web tension measuring roller can be provided which generates third measurement data by means of which the control device 10 controls the further dancer 9c.
  • a finishing device 23 Arranged along the path of movement of the web material 1 behind the testing device 21 and the further dancer 9c is a finishing device 23 which is set up to make the web material 1 into individual sheets.
  • the web material 1 can be fed to the finishing device 23 and by means of a cutting device 24 of the making-up device 23 can be cut to a predetermined sheet size in order to make up the web material 1 into individual sheets.
  • the individual sheets are then directed in a document switch 25 onto different transport paths 26a, 26b.
  • a transport path 26a leads into a document container 27.
  • Another transport path 26b leads into a reject container 28.
  • Sheets that carry a print image that has been determined to be the correct print image are designated as document sheets 29 and are routed from the document switch 25 to the transport path 26a, the leads into the document container 27.
  • Sheets that carry a print image that has been determined to be an incorrect print image are designated as waste sheets 30 and are directed by the document switch 25 onto the transport path 26b, which leads into the reject bin 28. In this way, print sheets which have errors in the print image can be sorted out. The print image of a waste sheet 30 can then be reprinted.
  • a bad marking device 31 can be provided, which is arranged along the path of movement of the web material 1 behind the testing device 21 and in front of the assembly device 23.
  • the bad marking device 31 is set up to provide a print image which has been determined as an incorrect print image with a marking which identifies the print image as an incorrect print image.
  • the bad marking device 31 can include a print head for this purpose.
  • the print image comprises several individual print images.
  • each individual print image can be determined as a correct individual print image or incorrect individual print image and the bad marking device 31 can be set up to provide each individual print image determined as an incorrect individual print image with a marking, which identifies the individual print image as an incorrect individual print image.
  • the document switch 25 can be omitted and all the separated sheets can be fed to the document container 27 via the transport path 26a.
  • the document switch 25 can be provided and set up to transfer printed sheets with a print image that includes a number of individual print images identified as incorrect individual print images that exceeds a predetermined maximum number of incorrect individual print images via the transport path 26b To feed reject container 28 and to feed other sheets via transport path 26a to document container 27.
  • the Fig. 4 shows another printing device for printing on a printing substrate.
  • a roll unwind module 40 comprises the roll 2, the first web tension measuring roll 7a with the sensor device 8a, the first dancer 9a and the associated deflection rollers 6.
  • a printing module 41 comprises the printing table 3, the print head shuttle 5 and the brush 16.
  • a drying module 42 comprises the second web tension measuring roller 7b with the sensor device 8b, the second dancer 9b, the drying devices 19a, 19b and the associated deflection rollers 6.
  • An image processing module 43 comprises the print image checking device with the image recording device 21 and optionally the bad marking device 31 Drying module 42 and the image processing module 43 can be combined to form a drying and image processing module.
  • a packaging module 44 includes the roller drive 22, the packaging device 23 with the cutting device 24, the document switch 25, the transport paths 26a, 26b, the document container 27 and the reject container 28.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Handling Of Sheets (AREA)
  • Ink Jet (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
EP20156182.6A 2019-02-08 2020-02-07 Dispositif et procédé d'impression d'un substrat d'impression Active EP3693174B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019103153.2A DE102019103153A1 (de) 2019-02-08 2019-02-08 Vorrichtung und Verfahren zum Bedrucken eines Drucksubstrats

Publications (3)

Publication Number Publication Date
EP3693174A2 true EP3693174A2 (fr) 2020-08-12
EP3693174A3 EP3693174A3 (fr) 2020-09-30
EP3693174B1 EP3693174B1 (fr) 2023-03-29

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EP (1) EP3693174B1 (fr)
DE (1) DE102019103153A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010060408A1 (de) 2010-11-08 2012-05-10 OCé PRINTING SYSTEMS GMBH Anordnung zur Regelung des Bahnzugs einer Bedruckstoffbahn bei einem Druckgerät
US20130088554A1 (en) 2011-02-10 2013-04-11 Hewlett-Packard Industrial Printing Ltd. Pallet transfer device
DE102012105338A1 (de) 2012-06-20 2013-12-24 Océ Printing Systems GmbH & Co. KG Verfahren zum Steuern eines digitalen Drucksystems sowie Drucksystem zum Ausführen eines solchen Verfahrens
EP1890884B1 (fr) 2005-05-30 2017-01-18 Agfa Graphics Nv Systeme d'impression comportant une table d'impression fixee de facon detachable a un module d'impression
DE102016224313A1 (de) 2016-01-18 2017-07-20 Heidelberger Druckmaschinen Ag Bogentransportsystem mit elektrischer Energieübertragung
DE102016102566A1 (de) 2016-02-15 2017-08-17 Bundesdruckerei Gmbh Verfahren und Vorrichtung zum Bedrucken eines vereinzelten Bogens in einer Druckvorrichtung
DE102016102565A1 (de) 2016-02-15 2017-08-17 Bundesdruckerei Gmbh Verfahren und Vorrichtung zum Herstellen eines vereinzelten Bogens in einer Druckvorrichtung

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Publication number Priority date Publication date Assignee Title
US8016380B2 (en) * 2004-01-30 2011-09-13 Polytype S.A. High precision feed particularly useful for UV ink jet printing on vinyl
WO2010087012A1 (fr) * 2009-01-30 2010-08-05 株式会社ミマキエンジニアリング Imprimante à jet d'encre
DE102009003443B4 (de) * 2009-02-05 2015-04-16 Theodor Hymmen Verwaltungs Gmbh Verfahren und Vorrichtung zum streifenförmigen Bedrucken großformatiger Werkstücke
JP2017159472A (ja) * 2016-03-07 2017-09-14 セイコーエプソン株式会社 媒体支持ユニット及び印刷装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1890884B1 (fr) 2005-05-30 2017-01-18 Agfa Graphics Nv Systeme d'impression comportant une table d'impression fixee de facon detachable a un module d'impression
DE102010060408A1 (de) 2010-11-08 2012-05-10 OCé PRINTING SYSTEMS GMBH Anordnung zur Regelung des Bahnzugs einer Bedruckstoffbahn bei einem Druckgerät
US20130088554A1 (en) 2011-02-10 2013-04-11 Hewlett-Packard Industrial Printing Ltd. Pallet transfer device
DE102012105338A1 (de) 2012-06-20 2013-12-24 Océ Printing Systems GmbH & Co. KG Verfahren zum Steuern eines digitalen Drucksystems sowie Drucksystem zum Ausführen eines solchen Verfahrens
DE102016224313A1 (de) 2016-01-18 2017-07-20 Heidelberger Druckmaschinen Ag Bogentransportsystem mit elektrischer Energieübertragung
DE102016102566A1 (de) 2016-02-15 2017-08-17 Bundesdruckerei Gmbh Verfahren und Vorrichtung zum Bedrucken eines vereinzelten Bogens in einer Druckvorrichtung
DE102016102565A1 (de) 2016-02-15 2017-08-17 Bundesdruckerei Gmbh Verfahren und Vorrichtung zum Herstellen eines vereinzelten Bogens in einer Druckvorrichtung

Also Published As

Publication number Publication date
EP3693174A3 (fr) 2020-09-30
EP3693174B1 (fr) 2023-03-29
DE102019103153A1 (de) 2020-08-13

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