EP2657915A1 - Device and method for the serial printing of print media - Google Patents
Device and method for the serial printing of print media Download PDFInfo
- Publication number
- EP2657915A1 EP2657915A1 EP13152470.4A EP13152470A EP2657915A1 EP 2657915 A1 EP2657915 A1 EP 2657915A1 EP 13152470 A EP13152470 A EP 13152470A EP 2657915 A1 EP2657915 A1 EP 2657915A1
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- EP
- European Patent Office
- Prior art keywords
- transport
- printing
- transport device
- medium
- 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.)
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000003455 independent Effects 0.000 claims 1
- 230000032258 transport Effects 0.000 abstract description 209
- 230000009046 primary transport Effects 0.000 abstract 2
- 230000009049 secondary transport Effects 0.000 abstract 2
- 230000003287 optical effect Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000976 ink Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- 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
- B41J11/007—Conveyor belts or like feeding devices
-
- 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
- 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
- B41J11/20—Platen adjustments for varying the strength of impression, for a varying number of papers, for wear or for alignment, or for print gap adjustment
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- 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
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/08—Conveyor bands or like feeding devices
-
- 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
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
- B41J13/12—Sheet holders, retainers, movable guides, or stationary guides specially adapted for small cards, envelopes, or the like, e.g. credit cards, cut visiting cards
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B17/00—Franking apparatus
- G07B17/00459—Details relating to mailpieces in a franking system
- G07B17/00467—Transporting mailpieces
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B17/00—Franking apparatus
- G07B17/00459—Details relating to mailpieces in a franking system
- G07B17/00508—Printing or attaching on mailpieces
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B17/00—Franking apparatus
- G07B17/00459—Details relating to mailpieces in a franking system
- G07B17/00508—Printing or attaching on mailpieces
- G07B2017/00516—Details of printing apparatus
- G07B2017/00524—Printheads
Definitions
- the invention relates to a device for serial printing of print media according to the preamble of claim 1 and a method for serial printing of print media.
- a method for printing on print media in which the media to be printed are fed by means of a transport device to a print head.
- the transport device comprises a plurality of conveyor belts arranged one behind the other in the transport direction, wherein a central conveyor belt is located below the print head and is height-adjustable with respect to the print head to set a suitable distance between the print medium to be printed and the print head for printing the print media is below the printhead.
- This central conveyor belt is pivotally connected to the adjacent conveyor belts, wherein the upstream in the transport direction conveyor belt forms a feed ramp and the downstream in the transport direction conveyor belt a discharge ramp for the print media.
- the thickness of the print medium is first detected, while the print medium is transported to the transport head to the print head.
- the central transport belt is moved to a suitable height relative to the print head to set a printable distance between the print medium surface to be printed and the print surface of the print head the detected thickness of the pressure medium is taken into account.
- the printing process is started, wherein the print medium is moved in the transport direction at a speed suitable for printing. After printing, the printed print medium from the central Passing conveyor belt on the downstream in the transport direction conveyor belt and transported away.
- the print head is a print head which has a certain longitudinal extent in the transport direction of the print media to be printed.
- This is the case, for example, in the case of inkjet printheads in which a plurality of ink jet nozzles (possibly for different printing inks) are arranged behind one another and at a distance from one another in the longitudinal direction of the printhead (and thus in the transport direction of the print media to be printed).
- Other printheads, such. B. laser printheads have a certain longitudinal extent in the longitudinal direction of the print head.
- the present invention seeks to provide an apparatus and a method for the serial printing of print media, with which a fast supply and removal of the print media is made possible.
- the throughput of printed print media in the printing device should be increased.
- the inventive device is particularly suitable for printing on mail, such. B. of envelopes on which z. B. the recipient and sender address and / or a Porto imprint and / or advertising imprints are printed.
- the inventive apparatus for the serial printing of print media comprises a printing head extending in a longitudinal direction with a printing surface lying in a plane and a printing region extending in the longitudinal direction.
- the device comprises a transport device for feeding the print media to be printed to the print head, wherein the transport device has at least a first transport device and a second transport device, which each move in a transport direction and are movable independently of one another in the orthogonal direction relative to the printing surface of the print head to bring a guided on the transport means printing medium to the printing surface of the printhead and to bring the surface to be printed of the printing medium in a suitable for printing distance to the printing surface.
- the transport device has a transfer area which is located in the printing area of the printing area, so that a printing medium can be transferred from the first transporting device to the second transporting device in the transfer area and thus within the printing area of the printing area. It is also possible to provide a plurality of transfer areas arranged one behind the other in the longitudinal direction within the printing area.
- This arrangement of a transfer area or several transfer areas in the print area of the print head makes it possible for a print medium to be transferred from the first transport device to the second transport device already before, during or at the latest immediately after the end of printing.
- the positioning of the front transport device seen in the transport direction with respect to the printing surface can already be adapted to the next printing medium, which is to be printed on the printing medium which is currently in the printing area.
- This next printing medium may optionally have a different thickness than the printing medium, which is currently in the printing area.
- the adjustment of the positioning of the front transport device with respect to the printing surface is thus possibly still during the printing of the printing medium, which is currently in the printing area, or immediately after completion of the printing operation.
- the first transport device and the second transport device can be moved independently of one another in the orthogonal direction relative to the printing surface in order to set suitable distances between the transport surfaces of the first and the second transport device with respect to the printing surface.
- both the first transport device and the second transport device are coupled to a drive for this purpose.
- the drive may be, for example, a servomotor or a linear motor.
- each drive has a counterweight to compensate for the mass forces.
- a thickness measuring device which is arranged in front of the print head in the transport direction.
- the thickness measuring device may be, for example, a rotary encoder.
- an optical sensor is used to detect the thickness of the print media, which detects the thickness of the print media by means of a triangulation method.
- the thickness of each printing medium detected by the thickness measuring device is taken into account in the adjustment of the positions of the first and the second transport device with respect to the printing surface of the print head, to ensure that the surface to be printed on the optionally different thickness print media at a suitable distance during printing comes to the printing surface.
- the transport device of the device according to the invention comprises a first conveyor belt and a second conveyor belt, wherein each conveyor belt is guided over a roller at its front end and at its rear end. At least one of the two rollers of each conveyor belt is driven by a motor.
- the conveyor belts of the first transport device and the second transport device are each designed as a suction belt belts, which suck a lying on the transport surface pressure medium by means of negative pressure.
- the transfer region of the transport device is formed by an overlap region in which the two transport devices overlap in the longitudinal direction.
- the two transport devices are expedient laterally offset side by side.
- the extent of the overlap region in the longitudinal direction expediently corresponds substantially to the longitudinal extent of the print area of the print head.
- the transport surfaces of the two transport devices are expediently at the same level when transferring a print medium.
- the first transport device and / or the second transport device with respect to the pressure surface is pivotable.
- This allows an inclination of the transport surfaces of the transport device with respect to the printing surface.
- the inclination of the transport surfaces takes place expediently in the direction perpendicular to the direction of transport.
- This embodiment of the device according to the invention is suitable for the serial printing of print media with a variable thickness or width across its width or length.
- FIG. 1 a first embodiment of a device according to the invention for serial printing of print media is shown.
- the print media to be printed may be, for example, mail items such.
- envelopes acting on which a recipient and sender imprint and possibly a postage and / or advertising imprints is printed.
- the device according to the invention can also be used for printing other print media.
- the device according to the invention is particularly suitable for the serial printing of print media which have different geometries and in particular different thicknesses.
- the device according to the invention is for this purpose with a transport device 4 and a Printhead 2 is equipped, wherein the transport device 4, the print media to be printed in a transport direction R, which is colinear to the longitudinal direction of the transport device, transported to the print head 2 and transported away after printing from the print head 2.
- the transport device 4 is movable in its position in a direction orthogonal to the transport direction with respect to the print head to adjust a setting of a suitable for printing the print media distance with respect to the print head. This adjustment mechanism will become apparent from the following description of the embodiment of FIG. 1 out.
- the printhead 2 which may, for example, be an inkjet printhead, has a housing and a plurality of pressure nozzles 2a, 2b, 2c, 2d arranged at a distance from one another in the longitudinal direction.
- the printing nozzles are, for example, to inkjet nozzles.
- the exit surfaces of the printing nozzles form an in-plane pressure surface 3, which extends in the longitudinal direction (ie in the direction of transport direction R of the transport device) over a pressure range 3a, which extends from the front pressure nozzle 2a to the rear pressure nozzle 2d.
- the pressure surface 3 is in a horizontal plane, wherein a different arrangement of the print head is possible.
- the transport device 4 comprises in the embodiment of FIG. 1 a first transport device 5 and a second transport device 6.
- the transport devices 5 and 6 each comprise a conveyor belt 15 and 16, which is expediently designed as a suction belt conveyor.
- Each suction belt belt 15, 16 has a plurality of openings, which are arranged in the longitudinal direction of the respective conveyor belt 15, 16 at a distance from each other.
- Each suction belt strap 15, 16 can be subjected to negative pressure in order to suck in a pressure medium lying on the transport surface 5c or 6c of the upper run of the suction belt straps 15, 16.
- the transport surfaces 5c and 6c of the conveyor belts 15 and 16 move expediently synchronously in a transport direction R in order to transport a printing medium resting on the respective transport surface 5c or 6c in the transport direction R.
- the front transport belt 15 of the first transport device 5 seen in the transport direction R is guided at its front end 5a via a first roller 11 and at its rear end 5b via a second roller 12.
- the first roller 11 is rotationally driven by a motor 13 to move the conveyor belt 15 in the direction of transport R.
- the conveyor belt 16 of the second transport device 6 is guided at its front end 6a via a first roller 11 and at its rear end 6b via a second roller 12, wherein in the FIG. 1
- the second roller 12 is driven by a motor 13 in order to move the conveyor belt 16 of the second transport device 6 in the transporting direction R.
- transport supports 17 and 18 are arranged on both sides of the conveyor belts.
- the transport supports 17 and 18 serve to guide the print media located on the transport surfaces 5c and 6c during their transport in the first transport device 5 and the second transport device 6, respectively.
- Both the first transport device 5 and the second transport device 6 can be moved perpendicular to the transport direction R with respect to the stationary print head 2.
- a drive 8 is provided on the first transport device 5 and a drive 9 on the second transport device 6.
- the drives 8, 9 may be, for example, a servo motor or a linear motor.
- the two transport devices 5 and 6 are moved independently of one another in a direction orthogonal to the transport direction R and relative to the print head 2.
- the first transport device 5 can be positioned independently of the second transport device 6 with respect to the stationary printhead 2 so that the distance between the transport surface 5c and the printing surface 3 of the printhead 2 can be infinitely adjusted within predefined limits.
- the distance between the transport surface 6c of the second transport device 6 and the printing surface 3 of the print head 2 can also be adjusted steplessly within predefined limits and independently of the positioning of the first transport device 5.
- the two transport devices 5 and 6 are arranged one behind the other in the longitudinal direction and in alignment with each other.
- the rear end 5b of the first transport device 5 adjoins the front end 6a of the second transport device 6.
- the rear end 5b of the first transport device 5 and the front end 6a of the second transport device 6 form a transfer region 7.
- a pressure medium of the first transport device 5 are transferred to the second transport device 6.
- the exact length of the transfer region 7 in the longitudinal direction depends on the dimensions of the print media to be transported.
- the transfer region 7 is defined by the region in the longitudinal direction, in which a secure transfer of a pressure medium from the first transport device 5 to the second transport device 6 can take place.
- this transfer area 7 is below the printhead 2, which in the embodiment of the FIGS. 1 and 2 is arranged so that the pressure surface 3 is in a horizontal plane.
- the transfer area 7 located below the print head 2 is located within the print area 3a of the print head 2, that is, in the longitudinal direction between the front print nozzle 2a and the rear print nozzle 2d.
- the positions of the transport devices 5 and 6 are suitably adjusted by means of the drives 8 and 9 so that the transport surfaces 5c and 6c during the transfer to the same position (ie the same height) are.
- FIGS. 4 and 5 is shown schematically in a perspective view and a side view, the supply of a print medium 1 to the print head 2.
- the print medium 1 located on the transport surface 5c of the first transport device 5 is moved by the transport device 5 in the transport direction R to the print head 2.
- the position of the first transport device 5 by means of the drive 8 with respect to the printing surface 3 is moved.
- the exact positioning of the first transport device 5 with respect to the print head 2 results from the appropriate distance between the surface to be printed 1a of the print medium 1 and the thickness of the print medium.
- a thickness measuring device for detecting the thickness of the printing medium, therefore, a thickness measuring device, not shown in the drawing, is provided, which is arranged in front of the print head 2 in the direction of transport R.
- the thickness measuring device may be, for example, a rotary encoder.
- an optical sensor is preferred used. In this case, in particular an optical sensor has proven to be suitable, which determines the thickness of the print media 1 via an optical triangulation method.
- the detected by the thickness gauge thickness of each print medium 1, which is supplied to the print head 2 by means of the transport device 4 is transferred to a control device (not shown here) and determines the control device taking into account the appropriate pressure gap between the surface 1a of the print medium 1 and the printing surface 3 of the print head 3, the position to be set of the first transport device 5 with respect to the printhead 2.
- the thus determined optimum position of the first transport device 5 is then set via the drive 8 and the printing medium 1 to be printed by the first transport device 5 in this position to the print head 2 approached. If the front edge of the print medium 1 seen in the transport direction R is at the front beginning of the print area 3, the printing process begins.
- the printing medium is moved by the first transporting device 5 further in the transporting direction R until the trailing edge of the printing medium 1 has reached the rear end of the printing area 3 and the printing has ended.
- the printed printing medium 1 is transferred from the first transport device 5 to the second transport device 6. The transfer takes place at the in the FIGS. 1 and 2
- the printed print medium is the first embodiment shown by switching on or off the negative pressure in the suction belt belts 15 and 16, respectively from the second transport device 6 further transported in the transport device R and then transferred to a downstream in the transport direction R (not shown here) further transport device or processing device.
- the transfer of the printing medium 1 from the first transport device 5 to the second transport device 6 already takes place during printing, ie while the printing medium 1 is in the printing region 3 a of the print head 2.
- the transfer of a print medium 1 is always carried out in the transfer area 7, located in the printing area 3a of the printing surface 3 is located.
- the pressure region 3a is defined by the longitudinally extending region between the front pressure nozzle 2a and the rear pressure nozzle 2d.
- the printing area 3a is defined by the longitudinally extending area in which the printing head 2 emits printing ink.
- FIG. 6 and FIG. 7 is the serial supply of print media 1 to the printhead 2 and their removal after printing shown.
- a first printing medium 1 is shown, which is located on the transport surface 6c of the second transport device 6 and within the printing area 3a and is being printed.
- a second printing medium 1 ' is located on the transport surface 5c of the first transport device 5.
- the second transport device 6 transports the printing medium 1 during printing through the printing area 3a of the printhead 2 and is therefore in a position in which the surface 1a of the printing medium 1 has a suitable for printing distance to the printing surface 3 of the print head 2.
- the first transport device 5 is in a lower position relative to the print head 2.
- the first transporting device 5 transports a second printing medium 1 'to be printed to the printing head 2. Due to the independent adjustment of the positions of the first transporting device 5 and the second transporting device 6 with respect to the printing head 2, it is possible to change the position (shown in FIG Embodiment, the height) of the first transport device 5 with respect to the print head 2 to the thickness of the print medium 1 'to adjust the optimal distance of the surface to be printed 1a' of the printing surface 3.
- the first transport device 5 - regardless of the position of the second transport device 6 - with respect to the printhead 2 are set so that the surface 1a' of the print medium 1 'to the Printing has a suitable distance from the printing surface 3 of the print head 2.
- the position of the first transport device 5 can already be adapted to the thickness of the print medium 1 ', while the preceding print medium 1 is still in the print area 3a of the print head 2 and is printed there.
- FIG. 3 shows, for example, a second embodiment of a device according to the invention, in which the first transport device 5 comprises a plurality of parallel to each other and extending in the longitudinal direction and in the transverse direction spaced apart conveyor belts 15a, 15b and 15c.
- the second transport device 6 also comprises a plurality of transversely spaced conveyor belts 16a, 16b, 16c and 16d.
- the conveyor belts 15a, 15b and 15c of the first transport device 5 are arranged offset relative to one another with respect to the conveyor belts 16a, 16b, 16c and 16d of the second transport device 6 in the transverse direction.
- the transfer region 7, which is provided for transferring a printing medium from the first transport device 5 to the second transport device 6, is thereby formed by an overlap region in which the two transport devices 5 and 6 overlap in the longitudinal direction.
- the rear end 5b of the first transport device 5 is located behind the front end 6a of the second transport device 6.
- the extent of the overlap region 7 in the longitudinal direction expediently corresponds substantially to the longitudinal extent of the printing region 3a of the print head 2.
- the first transport device 5 and the second transport device 6 comprise a plurality of transport rollers arranged one behind the other in the longitudinal direction instead of conveyor belts.
- the transport rollers can be driven separately from each motor associated with each transport roller. It is also possible to provide a single motor for driving the transport rollers and to couple the transport rollers with each other via a drive belt. In this case, it is also possible to provide a plurality of transfer areas 7, which are arranged one behind the other in the longitudinal direction and within the printing area 3a.
- a single motor 13 is provided to move the two transport devices 5 and 6 in the transport direction R.
- the first transport device 5 is coupled directly to this single motor.
- the second transport device 6 is connected via a coupling with the motor.
- a gear coupling it is possible to set a faster removal of the already printed print media with the second transport device 6, in comparison to the transport of the still unprinted print media to the print head 2 with the first transport device 5.
- the control device of the device in such a way that a printing medium located on the first transport device 5 is transferred to the second transport device 6 and transported therefrom in the transport direction R as soon as the printing medium in the transfer region 7 located.
- FIGS. 7 and 8th show two embodiments of the device according to the invention, which are particularly suitable for the serial printing of print media, which have over their width or their length a thickness profile.
- the first transport device 5 and / or the second transport device 6 with respect to the pressure surface 3 is pivotable.
- the pivotability of the transport devices 5, 6 allows an inclination of the transport surfaces 5c and 6c of the transport devices 5 and 6 with respect to the printing surface 3.
- the inclination of the transport surfaces 5c, 6c is carried out appropriately, as in the FIGS.
- the oblique position of the transport surfaces 5 c, 6 c is expediently carried out by pivoting the first transport device 5 or the second transport device 6 with respect to the print head 2 Fig. 8 illustrated embodiment, each of the two transport devices 5, 6 mounted on at least two spindles 20, 21.
- These spindles 20, 21 are arranged in the direction perpendicular to the transport direction R direction S at a distance from each other.
- the spindles 20, 21 are coupled to a motor, for example a servo motor, and can be moved independently therefrom in order to realize the inclination of the transport device 5 or 6.
- the two transport devices 5, 6 are each mounted only on a single spindle 20.
- the oblique position of the transport surfaces 5c and 6c takes place with respect to the pressure surface 3 by adjusting means not shown here.
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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- Ink Jet (AREA)
- Handling Of Sheets (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum seriellen Bedrucken von Druckmedien nach dem Oberbegriff des Anspruchs 1 sowie ein Verfahren zum seriellen Bedrucken von Druckmedien.The invention relates to a device for serial printing of print media according to the preamble of
Aus der
Zum Heranführen eines zu bedruckenden Druckmediums an den Druckkopf in einen zum Bedrucken geeigneten Abstand zwischen der zu bedruckenden Oberfläche des Druckmediums und einer Druckfläche des Druckkopfs wird zunächst die Dicke des Druckmediums erfasst, während das Druckmedium mit der Transportvorrichtung zu dem Druckkopf transportiert wird. Wenn sich ein zu bedruckendes Druckmedium auf dem zentralen Transportband unterhalb des Druckkopfs befindet, wird das zentrale Transportband in eine geeignete Höhe gegenüber dem Druckkopf verschoben, um einen zum Bedrucken geeigneten Abstand zwischen der zu bedruckenden Oberfläche des Druckmediums und der Druckfläche des Druckkopfs einzustellen, wobei hierfür die erfasste Dicke des Druckmediums berücksichtigt wird. Sobald sich das Druckmedium in einem geeigneten Abstand zum Druckkopf und unterhalb des Druckkopfs befindet, wird der Druckvorgang gestartet, wobei das Druckmedium mit einer für das Bedrucken geeigneten Geschwindigkeit in Transportrichtung bewegt wird. Nach dem Bedrucken wird das bedruckte Druckmedium von dem zentralen Transportband auf das in Transportrichtung nachgeordnete Transportband übergeben und abtransportiert.To bring a print medium to be printed on the print head in a suitable distance for printing between the surface to be printed of the print medium and a print surface of the print head, the thickness of the print medium is first detected, while the print medium is transported to the transport head to the print head. When a print medium to be printed on the central transport belt is located below the print head, the central transport belt is moved to a suitable height relative to the print head to set a printable distance between the print medium surface to be printed and the print surface of the print head the detected thickness of the pressure medium is taken into account. As soon as the print medium is at a suitable distance from the print head and below the print head, the printing process is started, wherein the print medium is moved in the transport direction at a speed suitable for printing. After printing, the printed print medium from the central Passing conveyor belt on the downstream in the transport direction conveyor belt and transported away.
Diese bekannte Anordnung zum seriellen Bedrucken von Druckmedien erweist sich insbesondere dann als nachteilig, wenn es sich bei dem Druckkopf um einen Druckkopf handelt, der in Transportrichtung der zu bedruckenden Druckmedien eine gewisse Längsausdehnung aufweist. Dies ist beispielsweise bei Tintenstrahl-Druckköpfen der Fall, in denen in Längsrichtung des Druckkopfs (und damit in Transportrichtung der zu bedruckenden Druckmedien) mehrere Tintenstrahl-Düsen (ggf. für unterschiedliche Druckfarben) hintereinander und im Abstand zueinander angeordnet sind. Auch andere Druckköpfe, wie z. B. Laser-Druckköpfe weisen in Längsrichtung des Druckkopfs eine gewisse Längsausdehnung auf. Dies hat zur Folge, dass die höhenvariable Transportvorrichtung, mit der die zu bedruckenden Druckmedien seriell dem Druckkopf zugeführt werden, während des Bedruckens eines Druckmediums, welches auf dem zentralen Transportband liegend von diesem an den Druckkopf herangeführt worden ist, die Höhe des zentralen Transportbands bezüglich des Druckkopfs nicht geändert werden kann, weil das sich auf dem zentralen Transportband befindliche Druckmedium während des Bedruckens in dem geeigneten Druckabstand zum Druckkopf gehalten werden muss. Aus diesem Grund können nachfolgende Druckmedien erst dann auf das zentrale Transportband übergeben und von diesem in einen geeigneten Abstand zum Druckkopf gebracht werden, wenn das vorausgehende Druckmedium fertig bedruckt und auf das nachgeordnete Transportband übergeben worden ist. Dies bedingt eine Verringerung der möglichen Transportgeschwindigkeit der Transportvorrichtung für den Zu- und Abtransport der Druckmedien und verringert den Durchsatz der Druckvorrichtung.This known arrangement for the serial printing of print media proves to be particularly disadvantageous if the print head is a print head which has a certain longitudinal extent in the transport direction of the print media to be printed. This is the case, for example, in the case of inkjet printheads in which a plurality of ink jet nozzles (possibly for different printing inks) are arranged behind one another and at a distance from one another in the longitudinal direction of the printhead (and thus in the transport direction of the print media to be printed). Other printheads, such. B. laser printheads have a certain longitudinal extent in the longitudinal direction of the print head. This has the consequence that the height-variable transport device with which the print media to be printed are serially fed to the print head, while printing a print medium, which has been brought on the central conveyor belt from this to the print head, the height of the central conveyor belt with respect to Printhead can not be changed because the pressure medium located on the central conveyor belt must be kept during printing at the appropriate pressure distance to the print head. For this reason, subsequent print media can only be transferred to the central conveyor belt and be brought from this at a suitable distance to the print head when the previous print medium has been finished printed and handed over to the downstream conveyor belt. This requires a reduction in the possible transport speed of the transport device for the supply and removal of the print media and reduces the throughput of the printing device.
Hiervon ausgehend liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung und ein Verfahren zum seriellen Bedrucken von Druckmedien aufzuzeigen, mit denen ein schneller Zu- und Abtransport der Druckmedien ermöglicht wird. Insbesondere soll der Durchsatz von bedruckten Druckmedien in der Druckvorrichtung erhöht werden.On this basis, the present invention seeks to provide an apparatus and a method for the serial printing of print media, with which a fast supply and removal of the print media is made possible. In particular, the throughput of printed print media in the printing device should be increased.
Gelöst wird diese Aufgabe mit einer Vorrichtung zum seriellen Bedrucken von Druckmedien mit den Merkmalen des Anspruchs 1 sowie mit einem Verfahren zum seriellen Bedrucken von Druckmedien mit den Merkmalen des Anspruchs 10. Bevorzugte Ausführungsformen der Vorrichtung sind in den abhängigen Ansprüchen 2 bis 9 angegeben.This object is achieved with a device for serial printing of print media with the features of
Die erfindungsgemäße Vorrichtung eignet sich insbesondere zum Bedrucken von Postsendungen, wie z. B. von Briefumschlägen, auf denen z. B. die Empfänger- und Absenderadresse und/oder ein Portoaufdruck und/oder Werbeaufdrucke aufzudrucken sind. Die erfindungsgemäße Vorrichtung zum seriellen Bedrucken von Druckmedien umfasst einen sich in einer Längsrichtung erstreckenden Druckkopf mit einer in einer Ebene liegenden Druckfläche und einem sich in Längsrichtung erstreckenden Druckbereich. Ferner umfasst die erfindungsgemäße Vorrichtung eine Transportvorrichtung zum Zuführen der zu bedruckenden Druckmedien zu dem Druckkopf, wobei die Transportvorrichtung zumindest eine erste Transporteinrichtung und eine zweite Transporteinrichtung aufweist, welche sich jeweils in einer Transportrichtung bewegen und in orthogonaler Richtung relativ zur Druckfläche des Druckkopfs unabhängig voneinander verfahrbar sind, um ein auf den Transporteinrichtungen geführtes Druckmedium an die Druckfläche des Druckkopfs heranzuführen und die zu bedruckende Oberfläche des Druckmediums in einen für das Bedrucken geeigneten Abstand zur Druckfläche zu bringen. Die Transportvorrichtung weist dabei erfindungsgemäß einen Übergabebereich auf, der sich im Druckbereich der Druckfläche befindet, so dass ein Druckmedium in dem Übergabebereich und damit innerhalb des Druckbereichs der Druckfläche von der ersten Transporteinrichtung auf die zweite Transporteinrichtung übergeben werden kann. Es können auch mehrere, innerhalb des Druckbereichs in Längsrichtung hintereinander angeordnete Übergabebereiche vorgesehen sein.The inventive device is particularly suitable for printing on mail, such. B. of envelopes on which z. B. the recipient and sender address and / or a Porto imprint and / or advertising imprints are printed. The inventive apparatus for the serial printing of print media comprises a printing head extending in a longitudinal direction with a printing surface lying in a plane and a printing region extending in the longitudinal direction. Furthermore, the device according to the invention comprises a transport device for feeding the print media to be printed to the print head, wherein the transport device has at least a first transport device and a second transport device, which each move in a transport direction and are movable independently of one another in the orthogonal direction relative to the printing surface of the print head to bring a guided on the transport means printing medium to the printing surface of the printhead and to bring the surface to be printed of the printing medium in a suitable for printing distance to the printing surface. According to the invention, the transport device has a transfer area which is located in the printing area of the printing area, so that a printing medium can be transferred from the first transporting device to the second transporting device in the transfer area and thus within the printing area of the printing area. It is also possible to provide a plurality of transfer areas arranged one behind the other in the longitudinal direction within the printing area.
Durch diese Anordnung eines Übergabebereichs oder mehrerer Übergabebereiche im Druckbereich des Druckkopfs wird ermöglicht, dass ein Druckmedium bereits vor, während oder spätestens unmittelbar nach Beendigung des Bedruckens von der ersten Transporteinrichtung auf die zweite Transporteinrichtung übergeben wird. Dadurch kann die Positionierung der in Transportrichtung gesehen vorderen Transporteinrichtung bezüglich der Druckfläche bereits an das nächste Druckmedium angepasst werden, welches nach dem Druckmedium, das sich gerade im Druckbereich befindet, bedruckt werden soll. Dieses nächste Druckmedium kann gegebenenfalls eine andere Dicke aufweisen als das Druckmedium, welches sich gerade im Druckbereich befindet. Die Anpassung der Positionierung der vorderen Transporteinrichtung bezüglich der Druckfläche erfolgt damit ggf. noch während des Bedruckens des Druckmediums, das sich gerade im Druckbereich befindet, oder unmittelbar nach Beendigung des Druckvorgangs. Es erfolgt daher eine schnellere Anpassung der Positionierung der vorderen Transporteinrichtung unter Berücksichtigung der Dicke des in Transportrichtung nachfolgenden Druckmediums bezüglich der Druckfläche. Dadurch kann eine höhere Zu- und Abtransport-Geschwindigkeit mit der Transportvorrichtung gefahren werden. Ferner kann ein geringerer Abstand zwischen aufeinanderfolgenden Druckmedien gewählt werden, welche mit der Transportvorrichtung dem Druckkopf seriell zugeführt werden. Durch beide Maßnahmen kann jeweils ein erhöhter Durchsatz der Druckvorrichtung erzielt werden.This arrangement of a transfer area or several transfer areas in the print area of the print head makes it possible for a print medium to be transferred from the first transport device to the second transport device already before, during or at the latest immediately after the end of printing. As a result, the positioning of the front transport device seen in the transport direction with respect to the printing surface can already be adapted to the next printing medium, which is to be printed on the printing medium which is currently in the printing area. This next printing medium may optionally have a different thickness than the printing medium, which is currently in the printing area. The adjustment of the positioning of the front transport device with respect to the printing surface is thus possibly still during the printing of the printing medium, which is currently in the printing area, or immediately after completion of the printing operation. There is therefore a faster adjustment of the positioning of the front transport under Consideration of the thickness of the downstream in the direction of transport pressure medium with respect to the printing surface. As a result, a higher feed and removal speed can be driven with the transport device. Furthermore, a smaller distance can be selected between successive print media, which are supplied to the print head in series with the transport device. Both measures can be achieved in each case an increased throughput of the printing device.
Erfindungsgemäß sind in der Vorrichtung zum seriellen Bedrucken von Druckmedien die erste Transporteinrichtung und die zweite Transporteinrichtung in orthogonaler Richtung relativ zur Druckfläche unabhängig voneinander verfahrbar, um geeignete Abstände zwischen den Transportflächen der ersten bzw. der zweiten Transporteinrichtung bezüglich der Druckfläche einzustellen. Zweckmäßig sind hierfür sowohl die erste Transporteinrichtung als auch die zweite Transporteinrichtung an einen Antrieb gekoppelt. Bei dem Antrieb kann es sich beispielsweise um einen Servomotor oder um einen Linearmotor handeln. Zweckmäßig weist jeder Antrieb ein Gegengewicht zum Ausgleich der Massenkräfte auf.According to the invention, in the apparatus for serial printing of print media, the first transport device and the second transport device can be moved independently of one another in the orthogonal direction relative to the printing surface in order to set suitable distances between the transport surfaces of the first and the second transport device with respect to the printing surface. Suitably, both the first transport device and the second transport device are coupled to a drive for this purpose. The drive may be, for example, a servomotor or a linear motor. Suitably, each drive has a counterweight to compensate for the mass forces.
Zur Erfassung der Dicke der zu bedruckenden und dem Druckkopf mittels der Transportvorrichtung seriell zuzuführenden Druckmedien ist zweckmäßig eine Dickenmesseinrichtung vorgesehen, welche in Transportrichtung vor dem Druckkopf angeordnet ist. Bei der Dickenmesseinrichtung kann es sich beispielsweise um einen Rotationsencoder handeln. Bevorzugt wird zur Erfassung der Dicke der Druckmedien ein optischer Sensor verwendet, der mittels eines Triangulationsverfahrens die Dicke der Druckmedien erfasst. Die von der Dickenmesseinrichtung erfasste Dicke jedes Druckmediums wird bei der Einstellung der Positionen der ersten bzw. der zweiten Transporteinrichtung bezüglich der Druckfläche des Druckkopfs berücksichtigt, um zu gewährleisten, dass die zu bedruckende Oberfläche der ggf. unterschiedlich dicken Druckmedien während des Bedruckens in einem geeigneten Abstand zur Druckfläche kommt.For detecting the thickness of the print media to be printed and to be supplied serially to the print head by means of the transport device, it is expedient to provide a thickness measuring device which is arranged in front of the print head in the transport direction. The thickness measuring device may be, for example, a rotary encoder. Preferably, an optical sensor is used to detect the thickness of the print media, which detects the thickness of the print media by means of a triangulation method. The thickness of each printing medium detected by the thickness measuring device is taken into account in the adjustment of the positions of the first and the second transport device with respect to the printing surface of the print head, to ensure that the surface to be printed on the optionally different thickness print media at a suitable distance during printing comes to the printing surface.
In einer bevorzugten Ausführungsform umfasst die Transportvorrichtung der erfindungsgemäßen Vorrichtung ein erstes Transportband und ein zweites Transportband, wobei jedes Transportband an seinem vorderen Ende und an seinem hinteren Ende über eine Rolle geführt ist. Wenigstens eine der beiden Rollen jedes Transportbands ist dabei von einem Motor angetrieben.In a preferred embodiment, the transport device of the device according to the invention comprises a first conveyor belt and a second conveyor belt, wherein each conveyor belt is guided over a roller at its front end and at its rear end. At least one of the two rollers of each conveyor belt is driven by a motor.
Bevorzugt sind die Transportbänder der ersten Transporteinrichtung und der zweiten Transporteinrichtung jeweils als Saugriemenbänder ausgebildet, welche ein auf der Transportfläche liegendes Druckmedium mittels Unterdruck ansaugen.Preferably, the conveyor belts of the first transport device and the second transport device are each designed as a suction belt belts, which suck a lying on the transport surface pressure medium by means of negative pressure.
In einem Ausführungsbeispiel der erfindungsgemäßen Vorrichtung wird der Übergabebereich der Transportvorrichtung durch einen Überlappungsbereich gebildet, in dem sich die beiden Transporteinrichtungen in Längsrichtung überlappen. Hierzu sind die beiden Transporteinrichtungen zweckmäßig seitlich versetzt nebeneinander angeordnet. Die Ausdehnung des Überlappungsbereichs in Längsrichtung entspricht dabei zweckmäßig im Wesentlichen der Längsausdehnung des Druckbereichs des Druckkopfs.In one embodiment of the device according to the invention, the transfer region of the transport device is formed by an overlap region in which the two transport devices overlap in the longitudinal direction. For this purpose, the two transport devices are expedient laterally offset side by side. The extent of the overlap region in the longitudinal direction expediently corresponds substantially to the longitudinal extent of the print area of the print head.
Um eine sichere Übergabe eines Druckmediums von der ersten Transporteinrichtung auf die zweite Transporteinrichtung sicher zu stellen, befinden sich die Transportflächen der beiden Transporteinrichtungen bei der Übergabe eines Druckmediums zweckmäßig auf gleicher Ebene.In order to ensure safe transfer of a print medium from the first transport device to the second transport device, the transport surfaces of the two transport devices are expediently at the same level when transferring a print medium.
In einer bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung ist die erste Transporteinrichtung und/oder die zweite Transporteinrichtung bezüglich der Druckfläche verschwenkbar. Dies ermöglicht eine Schrägstellung der Transportflächen der Transporteinrichtung bezüglich der Druckfläche. Die Schrägstellung der Transportflächen erfolgt dabei zweckmäßig in der zur Transportrichtung senkrechten Richtung. Diese Ausführungsform der erfindungsgemäßen Vorrichtung eignet sich zum seriellen Bedrucken von Druckmedien mit einer über deren Breite oder Länge veränderlichen Dicke. Durch eine Schrägstellung der Transportflächen der Transporteinrichtung kann hierbei gewährleistet werden, dass die zu bedruckenden Oberflächen der auf den Transportflächen der Transporteinrichtungen liegenden Druckmedien in eine zur Druckfläche parallelen Ebene gebracht werden.In a preferred embodiment of the device according to the invention, the first transport device and / or the second transport device with respect to the pressure surface is pivotable. This allows an inclination of the transport surfaces of the transport device with respect to the printing surface. The inclination of the transport surfaces takes place expediently in the direction perpendicular to the direction of transport. This embodiment of the device according to the invention is suitable for the serial printing of print media with a variable thickness or width across its width or length. By an inclined position of the transport surfaces of the transport device can be ensured in this case that the surfaces to be printed on the transport surfaces of the transport means lying print media are brought into a plane parallel to the printing surface.
Diese und weitere Vorteile der Erfindung ergeben sich aus dem nachfolgend unter Bezugnahme auf die begleitenden Zeichnungen beschriebenen Ausführungsbeispiel. Die Zeichnungen zeigen:
- Figur 1:
- Schematische Darstellung einer ersten Ausführungsform einer erfindungsgemäßen Vorrichtung zum seriellen Bedrucken von Druckmedien in einer perspektivischen Ansicht;
- Figur 2:
- Seitenansicht der Vorrichtung von
,Figur 1 - Figur 3:
- schematische Darstellung einer zweiten Ausführungsform einer erfindungsgemäßen Vorrichtung zum seriellen Bedrucken von Druckmedien in einer perspektivischen Ansicht;
- Figur 4:
- schematische Darstellung einer erfindungsgemäßen Vorrichtung zum seriellen Bedrucken von Druckmedien mit einem sich unterhalb des Druckkopfes befindlichen Druckmedium;
- Figur 5:
- Seitenansicht der Vorrichtung von
mit dem zu bedruckenden Druckmedium;Figur 5 - Figur 6:
- perspektivische Ansicht der
Vorrichtung von Figur 4 mit einem ersten zu bedruckenden Druckmedium, welches sich gerade beim Bedrucken unterhalb des Druckkopfes befindet und eines zweiten, noch unbedruckten Druckmediums, welches mit der Transportvorrichtung dem Druckkopf zugeführt wird; - Figur 7:
- Seitenansicht der
Darstellung von Figur 6 ; - Figur 8:
- Darstellung einer dritten Ausführungsform einer erfindungsgemäßen Vorrichtung zum seriellen Bedrucken von Druckmedien in einer Ansicht in Transportrichtung;
- Figur 9:
- Darstellung einer vierten Ausführungsform einer erfindungsgemäßen Vorrichtung zum seriellen Bedrucken von Druckmedien in einer Ansicht in Transportrichtung;
- FIG. 1:
- Schematic representation of a first embodiment of a device according to the invention for the serial printing of print media in a perspective view;
- FIG. 2:
- Side view of the device of
FIG. 1 . - FIG. 3:
- schematic representation of a second embodiment of an inventive apparatus for the serial printing of print media in a perspective view;
- FIG. 4:
- schematic representation of a device according to the invention for the serial printing of print media with a pressure medium located below the print head;
- FIG. 5:
- Side view of the device of
FIG. 5 with the print medium to be printed; - FIG. 6:
- perspective view of the device of
FIG. 4 with a first print medium to be printed, which is just below the print head when printing and a second, still unprinted print medium, which is supplied with the transport device to the print head; - FIG. 7:
- Side view of the presentation of
FIG. 6 ; - FIG. 8:
- Representation of a third embodiment of an apparatus according to the invention for the serial printing of print media in a view in the transport direction;
- FIG. 9:
- Representation of a fourth embodiment of an apparatus according to the invention for the serial printing of print media in a view in the transport direction;
In
Der Druckkopf 2, bei dem es sich bspw. um einen Tintenstrahl-Druckkopf handeln kann, weist ein Gehäuse und mehrere in Längsrichtung im Abstand zueinander angeordnete Druckdüsen 2a, 2b, 2c, 2d auf. Bei den Druckdüsen handelt sich bspw. um Tintenstrahldüsen. Die Austrittsflächen der Druckdüsen bilden eine sich in einer Ebene befindliche Druckfläche 3, welche sich in Längsrichtung (also in Richtung zur Transportrichtung R der Transportvorrichtung) über einen Druckbereich 3a erstreckt, der von der vorderen Druckdüse 2a bis zur hinteren Druckdüse 2d reicht. Zweckmäßig liegt die Druckfläche 3 in einer horizontalen Ebene, wobei auch eine andere Anordnung des Druckkopfs möglich ist. Alternativ zu einem Tintenstrahl-Druckkopf kann auch bspw. ein Laser-Druckkopf verwendet werden, der in entsprechender Weise über eine ebene Druckfläche 3 und einen sich in Längsrichtung erstreckenden Druckbereich 3a verfügt.The
Die Transportvorrichtung 4 umfasst bei dem Ausführungsbeispiel von
In Querrichtung zur Transportrichtung R sind zu beiden Seiten der Transportbänder 15 und 16 Transportauflagen 17 und 18 angeordnet. Die Transportauflagen 17 und 18 dienen der Führung der sich auf den Transportflächen 5c bzw. 6c befindlichen Druckmedien bei deren Transport in der ersten Transporteinrichtung 5 bzw. der zweiten Transporteinrichtung 6.In the transverse direction to the
Sowohl die erste Transporteinrichtung 5 als auch die zweite Transporteinrichtung 6 ist senkrecht zur Transportrichtung R bezüglich des feststehenden Druckkopfs 2 verfahrbar. Hierfür ist an der ersten Transporteinrichtung 5 ein Antrieb 8 und an der zweiten Transporteinrichtung 6 ein Antrieb 9 vorgesehen. Bei den Antrieben 8, 9 kann es sich beispielsweise um einen Servomotor oder um einen Linearmotor handeln. Über die Antriebe 8 und 9 können die beiden Transporteinrichtungen 5 und 6 unabhängig voneinander in einer zur Transportrichtung R orthogonalen Richtung und relativ zum Druckkopf 2 bewegt werden. Dadurch kann die erste Transporteinrichtung 5 unabhängig von der zweiten Transporteinrichtung 6 bezüglich des feststehenden Druckkopfs 2 so positioniert werden, dass innerhalb vorgegebener Grenzen stufenlos der Abstand zwischen der Transportfläche 5c und der Druckfläche 3 des Druckkopfs 2 eingestellt werden kann. In entsprechender Weise kann auch der Abstand zwischen der Transportfläche 6c der zweiten Transporteinrichtung 6 und der Druckfläche 3 des Druckkopfs 2 stufenlos innerhalb vorgegebener Grenzen und unabhängig von der Positionierung der ersten Transporteinrichtung 5 eingestellt werden.Both the
Die beiden Transporteinrichtungen 5 und 6 sind in Längsrichtung hintereinander und miteinander fluchtend angeordnet. Das hintere Ende 5b der ersten Transporteinrichtung 5 grenzt dabei an das vordere Ende 6a der zweiten Transporteinrichtung 6. Das hintere Ende 5b der ersten Transporteinrichtung 5 und das vordere Ende 6a der zweiten Transporteinrichtung 6 bilden einen Übergabebereich 7. In diesem Übergabebereich 7 kann ein Druckmedium von der ersten Transporteinrichtung 5 an die zweite Transporteinrichtung 6 übergeben werden. Die genaue Länge des Übergabebereichs 7 in Längsrichtung hängt dabei von den Abmessungen der zu transportierenden Druckmedien ab. Der Übergabebereich 7 ist dabei durch den Bereich in Längsrichtung definiert, in dem eine sichere Übergabe eines Druckmediums von der ersten Transporteinrichtung 5 auf die zweite Transporteinrichtung 6 erfolgen kann.The two
Wie sich insbesondere aus der Seitenansicht von
In den
Die genaue Positionierung der ersten Transporteinrichtung 5 bezüglich des Druckkopfs 2 ergibt sich dabei aus dem geeigneten Abstand zwischen der zu bedruckenden Oberfläche 1a des Druckmediums 1 und der Dicke des Druckmediums. Zur Erfassung der Dicke des Druckmediums ist daher eine zeichnerisch hier nicht dargestellte Dickenmesseinrichtung vorgesehen, welche in Transportrichtung R gesehen vor dem Druckkopf 2 angeordnet ist. Bei der Dickenmesseinrichtung kann es sich beispielsweise um einen Rotationsencoder handeln. Bevorzugt wird allerdings zur Erfassung der Dicke der Druckmedien 1 ein optischer Sensor verwendet. Hierbei hat sich insbesondere ein optischer Sensor als geeignet erwiesen, welcher die Dicke der Druckmedien 1 über ein optisches Triangulationsverfahren bestimmt.The exact positioning of the
Die von der Dickenmesseinrichtung erfasste Dicke jedes Druckmediums 1, welches dem Druckkopf 2 mittels der Transportvorrichtung 4 zugeführt wird, wird an eine Steuereinrichtung (hier nicht dargestellt) übergeben und die Steuereinrichtung ermittelt unter Berücksichtigung des geeigneten Druckabstands zwischen der Oberfläche 1a des Druckmediums 1 und der Druckfläche 3 des Druckkopfs 3 die einzustellende Position der ersten Transporteinrichtung 5 bezüglich des Druckkopfs 2. Die so bestimmte optimale Position der ersten Transporteinrichtung 5 wird dann über den Antrieb 8 eingestellt und das zu bedruckende Druckmedium 1 wird von der ersten Transporteinrichtung 5 in dieser Position an den Druckkopf 2 herangefahren. Befindet sich die in Transportrichtung R gesehen vordere Kante des Druckmediums 1 am vorderen Anfang des Druckbereichs 3, beginnt der Druckvorgang. Während des Bedruckens wird das Druckmedium von der ersten Transporteinrichtung 5 weiter in Transportrichtung R bewegt, bis die hintere Kante des Druckmediums 1 am hinteren Ende des Druckbereichs 3 angelangt ist und der Druck beendet ist. Nach Beendigung des Druckvorgangs wird das bedruckte Druckmedium 1 von der ersten Transporteinrichtung 5 auf die zweite Transporteinrichtung 6 übergeben. Die Übergabe erfolgt bei dem in den
In einer alternativen Verfahrensführung erfolgt die Übergabe des Druckmediums 1 von der ersten Transporteinrichtung 5 auf die zweite Transporteinrichtung 6 bereits während des Bedruckens, d. h. während sich das Druckmedium 1 im Druckbereich 3a des Druckkopfs 2 befindet. Mit der erfindungsgemäßen Vorrichtung ist es auch möglich, ein zu bedruckendes Druckmedium 1 bereits vor dem Beginn des Druckvorgangs von der ersten Transporteinrichtung 5 auf die zweite Transporteinrichtung 6 zu übergeben. Die Übergabe eines Druckmediums 1 erfolgt dabei immer im Übergabebereich 7, der sich im Druckbereich 3a der Druckfläche 3 befindet. Bei dem in den
In
Die Erfindung ist nicht auf das in den
In einem weiteren, hier zeichnerisch nicht dargestellten Ausführungsbeispiel umfasst die erste Transporteinrichtung 5 und die zweite Transporteinrichtung 6 statt Transportbänder mehrere in Längsrichtung hintereinander angeordnete Transportrollen. Die Transportrollen können dabei separat von einem jeder Transportrolle zugeordneten Motor angetrieben werden. Es istr auch möglich, einen einzigen Motor zum Antrieb der Transportrollen vorzusehen und die Transportrollen untereinander über einen Antriebsriemen miteinander zu koppeln. Dabei können auch mehrere Übergabebereiche 7 vorgesehen sein, welche in Längsrichtung hintereinander und innerhalb des Druckbereichs 3a angeordnet sind.In another exemplary embodiment, which is not illustrated here, the
In einem bevorzugten Ausführungsbeispiel der erfindungsgemäßen Vorrichtung ist ein einziger Motor 13 vorgesehen, um die beiden Transporteinrichtungen 5 und 6 in Transportrichtung R zu bewegen. Dabei wird die erste Transporteinrichtung 5 direkt mit diesem einzigen Motor gekoppelt. Die zweite Transporteinrichtung 6 ist über eine Kupplung mit dem Motor verbunden. Bei dieser Ausführungsvariante ist es möglich, durch Verwendung einer Übersetzungskupplung eine unterschiedliche Transportgeschwindigkeit der ersten Transporteinrichtung 5 bezüglich der zweiten Transporteinrichtung 6 einzustellen. Dadurch wird es beispielsweise ermöglicht, einen schnelleren Abtransport der bereits bedruckten Druckmedien mit der zweiten Transporteinrichtung 6 einzustellen, im Vergleich zum Zutransport der noch unbedruckten Druckmedien zu dem Druckkopf 2 mit der ersten Transporteinrichtung 5.In a preferred embodiment of the device according to the invention, a
In einer bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung ist vorgesehen, die Steuereinrichtung der Vorrichtung so zu programmieren, dass ein sich auf der ersten Transporteinrichtung 5 befindliches Druckmedium auf die zweite Transporteinrichtung 6 übergeben und von dieser in Transportrichtung R weitertransportiert wird, sobald sich das Druckmedium im Übergabebereich 7 befindet.In a preferred embodiment of the device according to the invention, it is provided to program the control device of the device in such a way that a printing medium located on the
Zum Ausgleich der Schwungmassen ist ferner in einem zeichnerisch nicht dargestellten Ausführungsbeispiel vorgesehen, die beiden Antriebe 8, 9 jeweils mit einem Gegengewicht zum Ausgleich der Massenkräfte zu versehen. Dies ermöglicht eine schwingungsfreie Annäherung der Transporteinrichtungen 5, 6 an den Druckkopf 2.To compensate for the flywheel masses is also provided in a drawing, not shown embodiment, to provide the two
In den
Die Schrägstellung der Transportflächen 5c, 6c erfolgt zweckmäßig durch ein Verschwenken der ersten Transporteinrichtung 5 bzw. der zweiten Transporteinrichtung 6 bezüglich des Druckkopfs 2. Bei dem in
Bei dem in
Claims (11)
Applications Claiming Priority (1)
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DE102012103712.4A DE102012103712B4 (en) | 2012-04-27 | 2012-04-27 | Apparatus and method for serial printing of print media |
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EP2657915A1 true EP2657915A1 (en) | 2013-10-30 |
EP2657915B1 EP2657915B1 (en) | 2015-05-27 |
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EP13152470.4A Active EP2657915B1 (en) | 2012-04-27 | 2013-01-24 | Device and method for the serial printing of print media |
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US (1) | US9090104B2 (en) |
EP (1) | EP2657915B1 (en) |
JP (1) | JP2013230668A (en) |
DE (1) | DE102012103712B4 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US10265947B2 (en) * | 2016-05-31 | 2019-04-23 | Canon Kabushiki Kaisha | Control apparatus for printing apparatus, printing method, and storage medium |
US10040654B2 (en) * | 2016-12-17 | 2018-08-07 | Xante Corporation | Envelope printing system |
CN109203725B (en) * | 2017-07-05 | 2023-08-04 | 康美包(苏州)有限公司 | Ink jet printer with print head protector |
US11186105B2 (en) | 2017-11-13 | 2021-11-30 | Hewlett-Packard Development Company, L.P. | Determine a change of a print medium |
CN115038590A (en) * | 2020-04-23 | 2022-09-09 | 惠普发展公司,有限责任合伙企业 | Adjusting distance between print medium and print head |
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US5274399A (en) * | 1990-02-21 | 1993-12-28 | Canon Kabushiki Kaisha | Recording apparatus with shiftable conveying unit |
US5321436A (en) * | 1989-09-04 | 1994-06-14 | Neopost Limited | Franking machine with means for checking operation of printing elements |
US20050135859A1 (en) * | 2003-12-18 | 2005-06-23 | Pitney Bowes Incorporated | Dynamic registration device for mailing system |
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DE10051767A1 (en) * | 2000-10-19 | 2002-05-02 | Francotyp Postalia Gmbh | Arrangement for printing postal items has print carriage that accepts postal print module, moves orthogonal to transport direction, transport speed determined by feed roller peripheral speed |
JP4687031B2 (en) * | 2004-08-04 | 2011-05-25 | 富士ゼロックス株式会社 | Recording device |
JP4680785B2 (en) * | 2006-01-18 | 2011-05-11 | 富士フイルム株式会社 | Inkjet recording device |
US20070206038A1 (en) * | 2006-03-03 | 2007-09-06 | Richard Baker | Ink jet printing with multiple conveyors |
JP2008183898A (en) * | 2007-01-05 | 2008-08-14 | Seiko Epson Corp | Inkjet printer |
JP2008254420A (en) * | 2007-03-15 | 2008-10-23 | Seiko Epson Corp | Printing apparatus |
JP2009137141A (en) * | 2007-12-06 | 2009-06-25 | Seiko Epson Corp | Double-sided image forming apparatus |
JP2011121680A (en) * | 2009-12-09 | 2011-06-23 | Seiko Epson Corp | Conveyed medium conveying device and image forming device |
JP5577893B2 (en) * | 2010-06-30 | 2014-08-27 | ブラザー工業株式会社 | Image recording device |
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2012
- 2012-04-27 DE DE102012103712.4A patent/DE102012103712B4/en not_active Expired - Fee Related
-
2013
- 2013-01-24 EP EP13152470.4A patent/EP2657915B1/en active Active
- 2013-03-13 US US13/799,687 patent/US9090104B2/en active Active
- 2013-03-21 JP JP2013057786A patent/JP2013230668A/en active Pending
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US5321436A (en) * | 1989-09-04 | 1994-06-14 | Neopost Limited | Franking machine with means for checking operation of printing elements |
US5274399A (en) * | 1990-02-21 | 1993-12-28 | Canon Kabushiki Kaisha | Recording apparatus with shiftable conveying unit |
US20050135859A1 (en) * | 2003-12-18 | 2005-06-23 | Pitney Bowes Incorporated | Dynamic registration device for mailing system |
US20050189409A1 (en) * | 2004-02-09 | 2005-09-01 | Conard Walter S. | Modular mail preparation system |
US20110074844A1 (en) | 2007-12-24 | 2011-03-31 | Pitney Bowes Inc. | Method and apparatus for printing on variable thickness print media |
US20090179928A1 (en) * | 2008-01-15 | 2009-07-16 | Ricoh Company, Ltd. | Image forming apparatus |
Also Published As
Publication number | Publication date |
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US9090104B2 (en) | 2015-07-28 |
EP2657915B1 (en) | 2015-05-27 |
DE102012103712B4 (en) | 2015-10-15 |
JP2013230668A (en) | 2013-11-14 |
US20130286126A1 (en) | 2013-10-31 |
DE102012103712A1 (en) | 2013-10-31 |
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