EP4368399A1 - Print head cleaning device, inkjet printer, and method for cleaning print head - Google Patents
Print head cleaning device, inkjet printer, and method for cleaning print head Download PDFInfo
- Publication number
- EP4368399A1 EP4368399A1 EP23207833.7A EP23207833A EP4368399A1 EP 4368399 A1 EP4368399 A1 EP 4368399A1 EP 23207833 A EP23207833 A EP 23207833A EP 4368399 A1 EP4368399 A1 EP 4368399A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- print head
- cleaning
- pressure element
- projection
- recess
- 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.)
- Pending
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 109
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000004744 fabric Substances 0.000 claims description 31
- 230000000295 complement effect Effects 0.000 claims description 5
- 239000000976 ink Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 8
- 238000002604 ultrasonography Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000003825 pressing 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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16535—Cleaning of print head nozzles using wiping constructions
-
- 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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16502—Printhead constructions to prevent nozzle clogging or facilitate nozzle cleaning
-
- 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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16535—Cleaning of print head nozzles using wiping constructions
- B41J2/16538—Cleaning of print head nozzles using wiping constructions with brushes or wiper blades perpendicular to the nozzle plate
-
- 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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16535—Cleaning of print head nozzles using wiping constructions
- B41J2/16544—Constructions for the positioning of wipers
-
- 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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16535—Cleaning of print head nozzles using wiping constructions
- B41J2002/1655—Cleaning of print head nozzles using wiping constructions with wiping surface parallel with nozzle plate and mounted on reels, e.g. cleaning ribbon cassettes
Definitions
- the invention relates to a device for cleaning a print head with a cleaning head module, wherein the cleaning head module has a pressure element, in particular a replaceable one, and is adjustable between a cleaning position in which the pressure element is pressed against a print head underside of the print head, and a release position in which the pressure element is released from the print head. Furthermore, the invention relates to an inkjet printer and a method for cleaning a print head.
- Print heads can become dirty, which can impair print quality.
- ink particularly based on organic solvents
- squeegees especially rubber squeegees
- dirt such as dried ink or various dirt particles.
- inks that contain relatively large pigments for example pigments with a diameter greater than 1 ⁇ m, can quickly lead to complete clogging of nozzles.
- the EN 10 2015 220 943 A1 describes a device and a method for cleaning a print head, in which a pressure element is pressed against the print head in a cleaning position and released from the print head in a release position. This device and the associated method have proven themselves well in practice.
- the object of the present invention is to provide a device for cleaning a print head, an inkjet printer and a method for cleaning an inkjet printer, by means of which a further improved cleaning effect is achieved.
- the object relating to the device is achieved by a device having the features of claim 1.
- the object relating to the inkjet printer is achieved by an inkjet printer having the features of claim 8 and the object relating to the method is achieved by a method having the features of claim 9.
- the device is characterized in particular by the fact that the pressure element has at least one projection on the side facing the underside of the print head, which in a cleaning position is accommodated in a recess formed on the underside of the print head.
- Recesses are formed on the underside of the print head, in particular through the print head nozzles or between the individual print head nozzles. Any remaining ink residue in these recesses can thus be removed using the projections and the print head can thus be cleaned better not only over the surface of the underside of the print head, but also in the recesses. This enables ink residue/dirt to be completely or at least largely removed from the print head.
- the at least one projection and the at least one recess are designed to complement each other. This makes it possible to provide an individually suitable pressure element for each design of the print head and thus to ensure optimal cleaning for each print head design. In particular, it is advantageous with regard to automated production and for maintenance of the device if the pressure element is designed to be replaceable.
- the position of the pressure element must be changed in order to be able to clean the print head at different angles.
- the individual adjustment, preferably complementary adjustment of the pressure element to the design of the underside of the print head thus enables the print head to be cleaned completely or at least largely with just one pressure element and only one pressing process. Cleaning is therefore more thorough and takes place more quickly.
- the pressure element has a number of projections adapted to the number of recesses formed on the underside of the print head, which projections are accommodated in the respective recesses in a cleaning position. This makes it possible to clean all recesses on the print head by accommodating the projection.
- the design of the projection is adapted to the design of the recess.
- the at least one projection is designed such that in the cleaning position it is received circumferentially with play in the recess such that it can be moved within the recess to a limited extent. Due to the limited mobility within the recess, an additional cleaning effect can be achieved by moving the projection back and forth in and against a cleaning direction. The additional friction of the projection on the recess surface caused by the movement improves the Cleaning result and also enables encrusted ink residues to be removed.
- the projection can be designed as a vibration head, in particular as an ultrasonic head, which generates vibrations, in particular in the ultrasonic frequency range.
- the limited movement of the projection within the recess can therefore preferably take place exclusively through the projection being designed to vibrate in the ultrasonic frequency range.
- the projection can be designed to be movable to a limited extent within the recess, i.e. displaceable, and can also be set to vibrate in the ultrasonic frequency range. The vibrations of the projection, in particular in the ultrasonic frequency range, allow dried ink to be removed from the recess even better.
- the projection has at least one additional tooth on its side facing the underside of the print head.
- a plurality of additional teeth are present. This allows ink residues to be absorbed in the interdental spaces formed between two teeth.
- the surface area of the cleaning surface is increased by means of the teeth.
- the pressure element is structured, which also improves the cleaning effect.
- at least one brush can be formed on the at least one tooth or in an interdental space formed between two teeth, which also improves the cleaning effect.
- at least one of the teeth can preferably also be designed to vibrate, in particular to vibrate in the ultrasonic range.
- a cloth or a brush is arranged on the side of the pressure element facing the underside of the print head. This improves the cleaning of the print head.
- the cloth can in particular be structured and/or have a pile, particularly preferably a deep pile.
- the inkjet printer according to the invention is characterized by the device described above and by a print head with one or more Recesses, whereby the embodiments, advantages and effects described for the device are also applicable to the inkjet printer.
- the cleaning head module is transferred from a release position in which the pressure element is released from the print head into a cleaning position in which the pressure element is pressed against the underside of the print head.
- a projection of the pressure element arranged on a side facing the underside of the print head is engaged in a recess of the print head formed on the underside of the print head for cleaning the print head or nozzle.
- the projection is moved to a limited extent within the recess in the cleaning position and/or if the projection vibrates within the recess in the cleaning position.
- the limited back and forth movement of the projection within the recess and the friction generated thereby can therefore be realized exclusively by vibration, in particular by ultrasound, or the projection can be moved back and forth within the recess to a limited extent, with the projection or at least one of the teeth additionally vibrating in the ultrasonic frequency range.
- the additional friction caused by the back and forth movement and/or by the vibration also allows encrusted ink residues to be easily removed.
- Fig.1 shows a perspective view of a device 1 for cleaning a print head 2, in particular of dried ink particles and other dirt particles.
- the device 1 comprises a cleaning head module 4.
- the device 1 also comprises a carriage 5, wherein the cleaning head module 4 is movably, in particular pivotably, attached to the carriage 5.
- the cleaning head module 4 is arranged on a free end 6 of a pivot arm 7, wherein the pivot arm 7 is rotatably attached to the carriage 5, in particular rotatably attached to a carriage plate 8.
- the device 1 also comprises a pivot bearing 9, which enables a rotational or pivoting movement of the pivot arm 7.
- the device 1 further comprises a base plate 10.
- This base plate 10 can be attached to a printing table (not shown in detail), in particular to a front side of the printing table.
- the device 1 further comprises guide elements designed as guide rails 12 for guiding a movement of the carriage 5. The movement is guided in and against a cleaning direction RR, which is in Fig.1 is shown by an arrow.
- the carriage 5 performs a linear movement in and against the cleaning direction RR. If the carriage 5 is moved in and against the cleaning direction RR, the movable part on the carriage 5 is also moved. attached cleaning head module 4 moves in and against the cleaning direction RR.
- the device 1 further comprises a device for moving the carriage 5.
- This device can comprise a motor 13, in particular a servo motor, which, in particular its output shaft, is mechanically connected to the carriage 5 via a spindle drive with a spindle 14. When the output shaft rotates, the carriage 5 moves along the spindle 14, its movement being guided by the guide rails 12.
- the device 1 further comprises a cleaning element designed as a cloth 15, wherein at least a portion of the cloth 15 is held by the cleaning head module 4.
- the cloth 15 can be structured and/or formed with a pile, in particular with a deep pile.
- the device 1 also has a cloth dispensing device 16 and a cloth receiving device 17.
- the cloth dispensing device 16 provides the cleaning cloth 15 in the form of a roll, wherein the cleaning cloth 15 can be unwound from the cloth dispensing device 16, which is designed as a cylinder around which the cleaning cloth 15 can be wound.
- the cleaning cloth 15 is received, in particular wound up, as a roll by the cloth receiving device 17, which is also designed as a cylinder around which the cleaning cloth 15 can be wound.
- the device 1 also comprises a device 18 for moving the cleaning cloth 15.
- the device 18 can be designed in particular as a servo motor which is mechanically coupled to the cloth receiving device 17, in particular to the cylinder of the cloth receiving device 17.
- the cloth receiving device 17 can be rotated by means of the device 18, as a result of which the cleaning cloth 15 is wound up and unwound from the cloth dispensing device 16.
- the cloth dispensing device 16, the cloth receiving device 17 and the device 18 are fastened to the carriage plate 8, wherein the cloth dispensing device 16 and the cloth receiving device 17 are rotatably mounted on the carriage plate 8.
- the cleaning head module 4 has a pressure element and can be moved by means of the carriage 5 in the cleaning direction RR and against the cleaning direction RR along the guide rail 12. In addition, the cleaning head module 4 can be moved between a Figure 2 shown release position and one in Figure 3 shown cleaning position. By adjusting the cleaning head module 4 in particular vertically into the cleaning position, the pressure element 3 is pressed against a print head underside 22 of the print head 2. This enables the print head 2, in particular the print head nozzles, to be cleaned. By adjusting the cleaning head module 4 in or against the cleaning direction RR, the print head 2 can then be cleaned. After cleaning, the cleaning head module 4 is adjusted, in particular by moving the carriage 5 vertically, into the release position in which the pressure element 3 is released from the print head 2 and the print head is therefore not cleaned.
- Print heads 2 usually have at least one, usually several recesses 19 in the form of print head nozzles or gaps on the print head underside 22.
- the pressure element 3 has at least one projection 11 or pin on the side facing the print head underside 22, which is at least partially received in the at least one recess 19 of the print head in the cleaning position.
- the print head 2 can thus also be cleaned in the recesses 19 by the respective projections 11.
- the projections 11 and the recesses 19 are preferably designed to be complementary to one another.
- the print head underside 22 and the pressure element 3 on the side facing the print underside 22 are thus designed to be complementary to one another.
- the pressure element 3 can in particular be designed to be exchangeable, so that for each design/construction of the print head 2, in particular on its printing underside 22, a matching pressure element 3, ie one formed complementarily to the print head 2, can be provided. This makes it possible to use the device 1 with different inkjet printers 21 with differently designed print heads 2.
- the pressure element 3 has a number of projections 11 adapted to the number of recesses 19 formed on the print head underside 22, as shown in the Figures 2 to 4 which are accommodated in the respective recesses 19 in a cleaning position.
- Figure 2 shows that the design of the projections 11 is adapted to the design of the recess 19, ie the geometric design of the projection 11 and the recess 19 match each other.
- the projections 11 are designed such that in the cleaning position they are received on the circumference with play 23 in the recess 19 such that they can be moved to a limited extent within the recess 19, in particular in and/or against the cleaning direction RR, as indicated by the double arrow.
- a limited back and forth movement of the projection 11 in and against the cleaning direction RR can improve the cleaning result through additional friction.
- the projection 11 can be designed as a vibration head, in particular as an ultrasound head, which generates vibrations, in particular in the ultrasound frequency range.
- the limited movement of the projection 11 within the recess 19 can therefore preferably take place exclusively by the projection 11 being designed to vibrate in the ultrasound frequency range.
- the projection 11 can be designed to be movable to a limited extent within the recess 19, i.e. displaceable, and can also be set into vibration, for example in the ultrasound frequency range.
- the projection 11 can be formed at least partially, particularly on its surface, from a piezoceramic material which expands or contracts when a voltage is applied.
- Figure 4 shows that the projection 11 has a plurality of additional teeth 20 on its side facing the print head underside 22. This increases the cleaning surface of the cleaning head 4.
- ink residues can be collected in the interdental spaces formed between two teeth 20. or other dirt can be picked up.
- a brush (not shown in detail) can be arranged on the at least one tooth 20 or in a tooth gap formed between two teeth 20 in order to further improve the cleaning effect.
- at least one of the teeth 20 can also be designed to vibrate - in particular in the ultrasonic range.
- the Figures 2 and 4 also show that a cloth 15 is arranged on the side of the pressure element 3 facing the print head underside 22.
- This can be structured and/or formed with a pile, in particular a deep pile.
- a brush can also be arranged there.
- the method for cleaning a print head 2 comprises the following steps: From the release position, the carriage 5 and thus the cleaning head module 4 are moved towards the print head 2 and thus adjusted to the cleaning position.
- the pressure element 3 of the cleaning head module 4 is pressed against the underside 22 of the print head.
- the at least one projection/projections 11 are at least partially received in the respective recesses 19, so that both the recesses 19 are cleaned by means of the cloth 15 and the surface of the underside 22 of the print head.
- the cleaning head module 4 is then adjusted along the guide rail 12 in the cleaning direction RR in order to travel over the entire print head 2.
- the carriage 5 can optionally be moved back and forth to a limited extent in and against the cleaning direction RR in such a way that the projection 11 is also moved back and forth to a limited extent within the recess 19.
- the projection 11 or at least one of the teeth 20 can vibrate in the cleaning position, in particular in the ultrasonic frequency range.
- the limited back and forth movement of the projection 11 within the recess 19, and the friction generated thereby can be realized exclusively by vibration, in particular by ultrasound, or the projection 11 can be moved back and forth within the recess to a limited extent, with the projection 11 or at least one of the teeth 20 additionally vibrating in the ultrasonic frequency range. This additional friction improves the cleaning result.
- the pressure element 3 is released from the print head 2 again.
- the projection/projections 11 are removed from the recesses 19 and the cleaning head 4 is moved back into the release position.
Landscapes
- Ink Jet (AREA)
Abstract
Die Erfindung betrifft eine Vorrichtung (1) zur Reinigung eines Druckkopfes (2) mit einem Reinigungskopfmodul (4), wobei das Reinigungskopfmodul (4) ein Andruckelement (3) aufweist und zwischen einer Reinigungsstellung, in der das Andruckelement gegen eine Druckkopfunterseite (22) des Druckkopfes (2) gedrückt ist, und einer Freigabestellung, in der das Andruckelement (3) vom Druckkopf (2) gelöst ist, verstellbar ist. Das Andruckelement (3) weist an der der Druckkopfunterseite (22) zugewandten Seite mindestens einen Vorsprung (11) auf, der in einer Reinigungsstellung in einer an der Druckkopfunterseite (22) ausgebildeten Vertiefung (19) aufgenommen ist. Die Erfindung betrifft darüber hinaus einen Tintenstrahldrucker und ein Verfahren zur Reinigung eines Druckkopfes.The invention relates to a device (1) for cleaning a print head (2) with a cleaning head module (4), wherein the cleaning head module (4) has a pressure element (3) and is adjustable between a cleaning position in which the pressure element is pressed against a print head underside (22) of the print head (2), and a release position in which the pressure element (3) is released from the print head (2). The pressure element (3) has at least one projection (11) on the side facing the print head underside (22), which projection is received in a cleaning position in a recess (19) formed on the print head underside (22). The invention further relates to an inkjet printer and a method for cleaning a print head.
Description
Die Erfindung betrifft eine Vorrichtung zur Reinigung eines Druckkopfes mit einem Reinigungskopfmodul, wobei das Reinigungskopfmodul ein insbesondere auswechselbares Andruckelement aufweist und zwischen einer Reinigungsstellung, in der das Andruckelement gegen eine Druckkopfunterseite des Druckkopfes gedrückt ist, und einer Freigabestellung, in der das Andruckelement vom Druckkopf gelöst ist, verstellbar ist. Darüber hinaus betrifft die Erfindung einen Tintenstrahldrucker und ein Verfahren zur Reinigung eines Druckkopfes.The invention relates to a device for cleaning a print head with a cleaning head module, wherein the cleaning head module has a pressure element, in particular a replaceable one, and is adjustable between a cleaning position in which the pressure element is pressed against a print head underside of the print head, and a release position in which the pressure element is released from the print head. Furthermore, the invention relates to an inkjet printer and a method for cleaning a print head.
Druckköpfe, insbesondere Druckköpfe von Tintenstrahl-Druckeinrichtungen, können verschmutzt werden, was eine Druckqualität beeinträchtigen kann. Z. B. kann Tinte, insbesondere auf Basis von organischen Lösemitteln, in relativ kurzer Zeitdauer trocknen. Dies kann insbesondere auch im Bereich der Düsen eines Druckkopfes erfolgen. Düsen können somit durch die getrocknete Tinte zumindest teilweise verstopft werden. Dies wiederum führt zu einer Verminderung der Druckqualität.Print heads, particularly print heads of inkjet printing devices, can become dirty, which can impair print quality. For example, ink, particularly based on organic solvents, can dry in a relatively short period of time. This can also happen in particular in the area of the nozzles of a print head. Nozzles can thus be at least partially blocked by the dried ink. This in turn leads to a reduction in print quality.
In herkömmlichen Reinigungsverfahren von Druckköpfen können sogenannte Rakel, insbesondere Gummi-Rakel, verwendet werden, um Schmutz, wie z. B. die angetrocknete Tinte oder davon verschiedene Schmutzpartikel, abzuwischen. Hierbei besteht jedoch die Gefahr, diesen Schmutz in die Düsen hineinzudrücken und diese, insbesondere dauerhaft, zu verstopfen. Insbesondere Tinten, die relativ große Pigmente, beispielsweise Pigmente mit einem Durchmesser größer als 1 µm umfassen, können schnell zu einer vollständigen Verstopfung von Düsen führen.In conventional print head cleaning processes, so-called squeegees, especially rubber squeegees, can be used to wipe off dirt, such as dried ink or various dirt particles. However, there is a risk of this dirt being pushed into the nozzles and clogging them, especially permanently. In particular, inks that contain relatively large pigments, for example pigments with a diameter greater than 1 µm, can quickly lead to complete clogging of nozzles.
Diese Tinten werden jedoch insbesondere zur Herstellung von Sicherheitserzeugnissen, insbesondere Wert- und/oder Sicherheitsdokumenten, genutzt.However, these inks are used in particular for the production of security products, in particular valuables and/or security documents.
Die
Aufgabe der vorliegenden Erfindung ist es, eine Vorrichtung zur Reinigung eines Druckkopfes, einen Tintenstrahldrucker und ein Verfahren zur Reinigung eines Tintenstrahldruckers bereitzustellen, durch die eine weiter verbesserte Reinigungswirkung erzielt wird.The object of the present invention is to provide a device for cleaning a print head, an inkjet printer and a method for cleaning an inkjet printer, by means of which a further improved cleaning effect is achieved.
Die die Vorrichtung betreffende Aufgabe wird durch eine Vorrichtung mit den Merkmalen des Anspruchs 1 gelöst. Die den Tintenstrahldrucker betreffende Aufgabe wird durch einen Tintenstrahldrucker mit den Merkmalen des Anspruchs 8 gelöst und die das Verfahren betreffende Aufgabe wird durch ein Verfahren mit den Merkmalen des Anspruchs 9 gelöst. Vorteilhafte Ausgestaltungen mit zweckmäßigen Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.The object relating to the device is achieved by a device having the features of
Die Vorrichtung zeichnet sich insbesondere dadurch aus, dass das Andruckelement an der der Druckkopfunterseite zugewandten Seite mindestens einen Vorsprung aufweist, der in einer Reinigungsstellung in einer an der Druckkopfunterseite ausgebildeten Vertiefung aufgenommen ist. An der Druckkopfunterseite sind Vertiefungen, insbesondere durch die Druckkopfdüsen oder zwischen den einzelnen Druckkopfdüsen, ausgebildet. Somit können verbleibende Tintenreste in diesen Vertiefungen mittels der Vorsprünge entfernt und somit der Druckkopf nicht nur flächig an der Druckkopfunterseite, sondern auch in den Vertiefungen besser gereinigt werden. Dies ermöglicht, dass Tintenreste/Schmutz vollständig oder zumindest zum großen Teil vom Druckkopf entfernt werden.The device is characterized in particular by the fact that the pressure element has at least one projection on the side facing the underside of the print head, which in a cleaning position is accommodated in a recess formed on the underside of the print head. Recesses are formed on the underside of the print head, in particular through the print head nozzles or between the individual print head nozzles. Any remaining ink residue in these recesses can thus be removed using the projections and the print head can thus be cleaned better not only over the surface of the underside of the print head, but also in the recesses. This enables ink residue/dirt to be completely or at least largely removed from the print head.
Zur weiteren Verbesserung der Reinigungswirkung ist es vorgesehen, dass der mindestens eine Vorsprung und die mindestens eine Vertiefung komplementär zueinander ausgebildet sind. Dies ermöglicht für jede Ausgestaltung des Druckkopfes ein individuell passendes Andruckelement bereitzustellen und somit für jede Druckkopfgestaltung die optimale Reinigung zu gewährleisten. Insbesondere ist es im Hinblick einer automatisierten Fertigung und für eine Wartung der Vorrichtung von Vorteil, wenn das Andruckelement austauschbar gestaltet ist.To further improve the cleaning effect, it is intended that the at least one projection and the at least one recess are designed to complement each other. This makes it possible to provide an individually suitable pressure element for each design of the print head and thus to ensure optimal cleaning for each print head design. In particular, it is advantageous with regard to automated production and for maintenance of the device if the pressure element is designed to be replaceable.
Aus dem Stand der Technik ist weiterhin bekannt, dass die Stellung des Anpresselements geändert werden muss, um den Druckkopf in verschiedenen Winkelstellungen reinigen zu können. Die individuelle Anpassung, vorzugsweise komplementäre Anpassung des Andruckelements an die Ausgestaltung der Druckkopfunterseite ermöglicht somit, dass der Druckkopf vollständig oder zumindest zum Großteil mit nur einem Andruckelement mit ausschließlich einem Anpressvorgang gereinigt werden kann. Die Reinigung wird somit gründlicher und erfolgt schneller.It is also known from the prior art that the position of the pressure element must be changed in order to be able to clean the print head at different angles. The individual adjustment, preferably complementary adjustment of the pressure element to the design of the underside of the print head thus enables the print head to be cleaned completely or at least largely with just one pressure element and only one pressing process. Cleaning is therefore more thorough and takes place more quickly.
Weiterhin ist es von Vorteil, wenn das Andruckelement eine an die Anzahl der an der Druckkopfunterseite ausgebildeten Vertiefungen angepasste Anzahl an Vorsprüngen aufweist, die in einer Reinigungsstellung in den jeweiligen Vertiefungen aufgenommen sind. Dies ermöglicht es, alle Vertiefungen am Druckkopf durch die Aufnahme des Vorsprungs zu reinigen.It is also advantageous if the pressure element has a number of projections adapted to the number of recesses formed on the underside of the print head, which projections are accommodated in the respective recesses in a cleaning position. This makes it possible to clean all recesses on the print head by accommodating the projection.
Um für verschieden ausgebildete Druckköpfe jeweils ein optimales Andruckelement bereitstellen zu können, ist es bevorzugt, wenn die Ausgestaltung des Vorsprungs angepasst ist an die Ausgestaltung der Vertiefung.In order to be able to provide an optimal pressure element for differently designed print heads, it is preferred if the design of the projection is adapted to the design of the recess.
In einer alternativen Ausführungsform ist der mindestens eine Vorsprung derart ausgebildet, dass er in der Reinigungsstellung umfangsseitig mit Spiel in der Vertiefung derart aufgenommen ist, dass er innerhalb der Vertiefung begrenzt bewegbar ist. Durch die begrenzte Bewegbarkeit innerhalb der Vertiefung kann eine zusätzliche Reinigungswirkung durch hin- und her verfahren des Vorsprungs in und entgegen einer Reinigungsrichtung erfolgen. Die durch die Bewegung zusätzlich hervorgerufene Reibung des Vorsprungs an der Vertiefungsfläche verbessert das Reinigungsergebnis und ermöglicht auch verkrustete Tintenreste zu entfernen. Alternativ oder zusätzlich kann der Vorsprung als ein Vibrationskopf, insbesondere als ein Ultraschallkopf gebildet sein, der Vibrationen, insbesondere im Ultraschallfrequenzbereich, erzeugt. Die begrenzte Bewegung des Vorsprungs innerhalb der Vertiefung kann folglich vorzugsweise ausschließlich durch den - im Ultraschallfrequenzbereich - vibrierend ausgebildeten Vorsprung erfolgen. Alternativ kann der Vorsprung innerhalb der Vertiefung begrenzt bewegbar, also verfahrbar, ausgebildet sein und zusätzlich in Vibration im Ultraschallfrequenzbereich versetzbar sein. Durch die Vibrationen des Vorsprungs, insbesondere im Ultraschallfrequenzbereich, kann angetrocknete Tinte noch besser aus der Vertiefung gelöst werden.In an alternative embodiment, the at least one projection is designed such that in the cleaning position it is received circumferentially with play in the recess such that it can be moved within the recess to a limited extent. Due to the limited mobility within the recess, an additional cleaning effect can be achieved by moving the projection back and forth in and against a cleaning direction. The additional friction of the projection on the recess surface caused by the movement improves the Cleaning result and also enables encrusted ink residues to be removed. Alternatively or additionally, the projection can be designed as a vibration head, in particular as an ultrasonic head, which generates vibrations, in particular in the ultrasonic frequency range. The limited movement of the projection within the recess can therefore preferably take place exclusively through the projection being designed to vibrate in the ultrasonic frequency range. Alternatively, the projection can be designed to be movable to a limited extent within the recess, i.e. displaceable, and can also be set to vibrate in the ultrasonic frequency range. The vibrations of the projection, in particular in the ultrasonic frequency range, allow dried ink to be removed from the recess even better.
Um eine bessere Druckverteilung zu erzielen, ist es von Vorteil, wenn der Vorsprung an seiner der Druckkopfunterseite zugewandten Seite mindestens einen zusätzlichen Zahn aufweist. Insbesondere ist es von Vorteil, wenn eine Mehrzahl von zusätzlichen Zähnen vorhanden sind. So können Tintenreste in den zwischen zwei Zähnen ausgebildeten Zahnzwischenräumen aufgenommen werden. Zudem erfolgt eine Flächenvergrößerung der Reinigungsfläche mittels der Zähne. Durch die Ausgestaltung der Vorsprünge mit zusätzlichen Zähnen ist das Andruckelement strukturiert ausgebildet, was ebenfalls die Reinigungswirkung verbessert. Alternativ oder zusätzlich kann an dem mindestens einem Zahn oder in einem zwischen zwei Zähnen ausgebildeten Zahnzwischenraum mindestens eine Bürste ausgebildet sein, die ebenfalls die Reinigungswirkung verbessert. Weiterhin können bevorzugt auch mindestens einer der Zähne vibrierend, insbesondere im Ultraschallbereich vibrierend ausgebildet sein.In order to achieve better pressure distribution, it is advantageous if the projection has at least one additional tooth on its side facing the underside of the print head. In particular, it is advantageous if a plurality of additional teeth are present. This allows ink residues to be absorbed in the interdental spaces formed between two teeth. In addition, the surface area of the cleaning surface is increased by means of the teeth. By designing the projections with additional teeth, the pressure element is structured, which also improves the cleaning effect. Alternatively or additionally, at least one brush can be formed on the at least one tooth or in an interdental space formed between two teeth, which also improves the cleaning effect. Furthermore, at least one of the teeth can preferably also be designed to vibrate, in particular to vibrate in the ultrasonic range.
Weiterhin ist es bevorzugt, wenn auf der der Druckkopfunterseite zugewandten Seite des Andruckelements ein Tuch oder eine Bürste angeordnet ist. Dies verbessert die Reinigung des Druckkopfes. Das Tuch kann insbesondere strukturiert und/oder mit einem Flor, besonders bevorzugt hochflorig ausgebildet sein.It is also preferred if a cloth or a brush is arranged on the side of the pressure element facing the underside of the print head. This improves the cleaning of the print head. The cloth can in particular be structured and/or have a pile, particularly preferably a deep pile.
Der erfindungsgemäße Tintenstrahldrucker zeichnet sich durch die vorangehend beschriebene Vorrichtung und durch einen Druckkopf mit einer oder mit mehreren Vertiefungen aus, wobei die zur Vorrichtung beschriebenen Ausführungen, Vorteile und Wirkungen auch auf den Tintenstrahldrucker anwendbar sind.The inkjet printer according to the invention is characterized by the device described above and by a print head with one or more Recesses, whereby the embodiments, advantages and effects described for the device are also applicable to the inkjet printer.
Beim erfindungsgemäßen Verfahren zur Reinigung eines Druckkopfes mit einem Reinigungskopfmodul, welches ein auswechselbares Andruckelement aufweist, wird das Reinigungskopfmodul aus einer Freigabestellung, in der das Andruckelement vom Druckkopf gelöst ist, in eine Reinigungsstellung überführt, in der das Andruckelement gegen eine Druckkopfunterseite gedrückt wird. Dabei wird beim Überführen des Andruckelements in die Reinigungsstellung ein an einer der Druckkopfunterseite zugewandten Seite angeordneter Vorsprung des Andruckelements in eine an der Druckkopfunterseite ausgebildete Vertiefung des Druckkopfs zur Druckkopf- oder Düsenreinigung eingerückt.In the method according to the invention for cleaning a print head with a cleaning head module which has a replaceable pressure element, the cleaning head module is transferred from a release position in which the pressure element is released from the print head into a cleaning position in which the pressure element is pressed against the underside of the print head. When the pressure element is transferred into the cleaning position, a projection of the pressure element arranged on a side facing the underside of the print head is engaged in a recess of the print head formed on the underside of the print head for cleaning the print head or nozzle.
Dies ermöglicht eine verbesserte Reinigung des Druckkopfes, indem auch die an der Druckkopfunterseite ausgebildeten Vertiefungen mittels der Vorsprünge gereinigt werden können. Weiterhin gelten auch die für die Vorrichtung genannten Vorteile für das erfindungsgemäße Verfahren.This enables improved cleaning of the print head, as the recesses formed on the underside of the print head can also be cleaned using the projections. Furthermore, the advantages mentioned for the device also apply to the method according to the invention.
Weiterhin ist es vorteilhaft, wenn der Vorsprung in der Reinigungsstellung innerhalb der Vertiefung begrenzt bewegt wird und/oder dass der Vorsprung in der Reinigungsstellung innerhalb der Vertiefung vibriert.. Die begrenzte Hin- und Herbewegung des Vorsprungs innerhalb der Vertiefung, und die dadurch erzeugte Reibung, kann folglich ausschließlich durch Vibration, insbesondere durch Ultraschall, realisiert werden, oder der Vorsprung ist begrenzt innerhalb der Vertiefung hin- und herverfahrbar, wobei der Vorsprung oder zumindest einer der Zähne zusätzlich im Ultraschallfrequenzbereich vibriert. Durch die zusätzliche durch die Hin- und Herbewegung und/oder durch die Vibration hervorgerufene Reibung, können auch verkrustete Tintenreste gut entfernt werden.Furthermore, it is advantageous if the projection is moved to a limited extent within the recess in the cleaning position and/or if the projection vibrates within the recess in the cleaning position. The limited back and forth movement of the projection within the recess and the friction generated thereby can therefore be realized exclusively by vibration, in particular by ultrasound, or the projection can be moved back and forth within the recess to a limited extent, with the projection or at least one of the teeth additionally vibrating in the ultrasonic frequency range. The additional friction caused by the back and forth movement and/or by the vibration also allows encrusted ink residues to be easily removed.
Die vorliegende Erfindung wird nachfolgend anhand von Figuren näher erläutert, wobei die dargestellten Beispiele lediglich exemplarischen Charakter haben und keine Einschränkung hinsichtlich der Tragweite der beschriebenen Erfindung darstellen. Es zeigen im Einzelnen:
Figur 1- eine perspektivische Ansicht einer Vorrichtung zum Reinigen eines Druckkopfes,
Figur 2- eine schematische Ansicht eines Druckkopfes und eines Andruckelements in der Freigabestellung,
Figur 3- eine schematische Ansicht eines Druckkopfes und eines Andruckelements in der Reinigungsstellung mit Spalt, und
- Figur 4
- eine schematische Ansicht eines Druckkopfes und eines Andruckelements mit zusätzlichen Zähnen.
- Figure 1
- a perspective view of a device for cleaning a print head,
- Figure 2
- a schematic view of a print head and a pressure element in the release position,
- Figure 3
- a schematic view of a print head and a pressure element in the cleaning position with gap, and
- Figure 4
- a schematic view of a print head and a pressure element with additional teeth.
Die Vorrichtung 1 umfasst weiter eine Grundplatte 10. Diese Grundplatte 10 kann an einem nicht näher dargestellten Drucktisch, insbesondere an einer Stirnseite des Drucktisches, befestigt werden. Die Vorrichtung 1 umfasst weiter als Führungsschienen 12 ausgebildete Führungselemente zur Führung einer Bewegung des Schlittens 5. Die Bewegung wird hierbei in und entgegen einer Reinigungsrichtung RR geführt, die in
Weiter umfasst die Vorrichtung 1 eine Einrichtung zur Bewegung des Schlittens 5. Diese Einrichtung kann einen Motor 13, insbesondere einen Servomotor, umfassen, der, insbesondere dessen Abtriebswelle, über einen Spindelantrieb mit einer Spindel 14 mit dem Schlitten 5 mechanisch verbunden ist. Bei einer Rotation der Abtriebswelle bewegt sich der Schlitten 5 entlang der Spindel 14, wobei dessen Bewegung durch die Führungsschienen 12 geführt wird.The
Weiter umfasst die Vorrichtung 1 ein als Tuch 15 ausgebildetes Reinigungselement, wobei zumindest ein Abschnitt des Tuches 15 von dem Reinigungskopfmodul 4 gehalten wird. Das Tuch 15 kann strukturiert und/oder mit einem Flor, insbesondere hochflorig gebildet sein.The
Weiter weist die Vorrichtung 1 eine Tuchspendeeinrichtung 16 und eine Tuchaufnahmeeinrichtung 17 auf. Durch die Tuchspendeeinrichtung 16 wird das Reinigungstuch 15 in Form einer Rollenware bereitgestellt, wobei das Reinigungstuch 15 von der Tuchspendeeinrichtung 16, die als ein mit dem Reinigungstuch 15 umwickelbarer Zylinder ausgebildet ist, abgewickelt werden kann. Von der Tuchaufnahmeeinrichtung 17, die ebenfalls als ein mit dem Reinigungstuch 15 umwickelbarer Zylinder ausgebildet ist, wird das Reinigungstuch 15 als Rollenware aufgenommen, insbesondere aufgewickelt. Die Vorrichtung 1 umfasst weiter eine Einrichtung 18 zur Bewegung des Reinigungstuches 15. Die Einrichtung 18 kann insbesondere als Servomotor ausgebildet sein, der mechanisch mit der Tuchaufnahmeeinrichtung 17, insbesondere mit dem Zylinder der Tuchaufnahmeeinrichtung 17, gekoppelt ist. Mittels der Einrichtung 18 kann die Tuchaufnahmeeinrichtung 17 rotiert werden, wodurch das Reinigungstuch 15 aufgewickelt und hierbei von der Tuchspendeeinrichtung 16 abgewickelt wird. Die Tuchspendeeinrichtung 16 , die Tuchaufnahmeeinrichtung 17 sowie die Einrichtung 18 sind an der Schlittenplatte 8 befestigt, wobei die Tuchspendeeinrichtung 16 und die Tuchaufnahmeeinrichtung 17 drehbar an der Schlittenplatte 8 gelagert sind.The
Das Reinigungskopfmodul 4 weist ein Andruckelement auf und ist mittels des Schlittens 5 in der Reinigungsrichtung RR und entgegen der Reinigungsrichtung RR entlang der Führungsschiene 12 bewegbar. Außerdem kann das Reinigungskopfmodul 4 zwischen einer in
Druckköpfe 2 weisen üblicherweise an der Druckkopfunterseite 22 mindestens eine, meistens mehrere Vertiefungen 19 in Form von Druckkopfdüsen oder Zwischenräumen auf. Demgegenüber weist nun erfindungsgemäß das Andruckelement 3 an der der Druckkopfunterseite 22 zugewandten Seite mindestens einen Vorsprung 11 oder auch Zapfen auf, der in der Reinigungsstellung in der mindestens einen Vertiefung 19 des Druckkopfes zumindest teilweise aufgenommen ist. Somit kann der Druckkopf 2 zusätzlich in den Vertiefungen 19 durch die jeweiligen Vorsprünge 11 gereinigt werden. Bevorzugt sind die Vorsprünge 11 und die Vertiefungen 19 komplementär zueinander ausgebildet. Somit sind die Druckkopfunterseite 22 und das Andruckelement 3, an der der Druckunterseite 22 zugewandten Seite komplementär zueinander ausgebildet. Das Andruckelement 3 kann insbesondere austauschbar gestaltet sein, so dass für jede Gestaltung/Ausbildung des Druckkopfes 2, insbesondere an dessen Druckunterseite 22, ein dazu passendes, d.h. komplementär zum Druckkopf 2 gebildetes Andruckelement 3 bereitgestellt werden kann. Dies ermöglicht es, die Vorrichtung 1 auch bei verschiedenen Tintenstrahldruckern 21 mit unterschiedlich ausgestalteten Druckköpfen 2 zu verwenden.Print heads 2 usually have at least one, usually
Weiterhin weist das Andruckelement 3 eine an die Anzahl der an der Druckkopfunterseite 22 ausgebildeten Vertiefungen 19 angepasste Anzahl an Vorsprüngen 11 auf, wie dies in den
In
Die
Das Verfahren zur Reinigung eines Druckkopfes 2 umfasst die folgenden Schritte: Aus der Freigabestellung wird der Schlitten 5 und damit das Reinigungskopfmodul 4 auf den Druckkopf 2 zubewegt und somit in die Reinigungsstellung verstellt. Dabei wird das Andruckelement 3 des Reinigungskopfmoduls 4 gegen die Druckkopfunterseite 22 gedrückt. Der mindestens eine Vorsprung/die Vorsprünge 11 werden in die jeweiligen Vertiefungen 19 zumindest teilweise aufgenommen, so dass sowohl die Vertiefungen 19 mittels des Tuches 15 als auch die Fläche der Druckkopfunterseite 22 gereinigt wird. Für die Reinigung der Druckkopfunterseite 22 und damit der Druckdüsen, wird dann das Reinigungskopfmodul 4 entlang der Führungsschiene 12 in Reinigungsrichtung RR verstellt um den gesamten Druckkopf 2 abzufahren. Um die Reinigungswirkung zu verstärken kann optional der Schlitten 5 begrenzt in und entgegen der Reinigungsrichtung RR derart hin- und herbewegt werden, dass der Vorsprung 11 innerhalb der Vertiefung 19 ebenfalls begrenzt hin- und herbewegt wird. Vorzugsweise kann der der Vorsprung 11 oder zumindest einer der Zähne 20 in der Reinigungsstellung, insbesondere im Ultraschallfrequenzbereich vibrieren. Das heißt die begrenzte Hin- und Herbewegung des Vorsprungs 11 innerhalb der Vertiefung 19, und die dadurch erzeugte Reibung, kann ausschließlich durch Vibration, insbesondere durch Ultraschall, realisiert werden, oder der Vorsprung 11 ist begrenzt innerhalb der Vertiefung hin- und her-verfahrbar, wobei der Vorsprung 11 oder zumindest einer der Zähne 20 zusätzlich im Ultraschallfrequenzbereich vibriert. Diese zusätzliche Reibung verbessert das Reinigungsergebnis. Nach erfolgter Reinigung des Druckkopfes 2 wird das Andruckelement 3 vom Druckkopf 2 wieder gelöst. Dabei werden der Vorsprung/die Vorsprünge 11 aus den Vertiefungen 19 entfernt und der Reinigungskopf 4 wird wieder in die Freigabestellung verstellt.The method for cleaning a
- 11
- Vorrichtungcontraption
- 22
- DruckkopfPrinthead
- 33
- AndruckelementPressure element
- 44
- ReinigungskopfmodulCleaning head module
- 55
- SchlittenSleds
- 66
- freies Endefree end
- 77
- SchwenkarmSwivel arm
- 88th
- SchlittenplatteSlide plate
- 99
- DrehgelenkSwivel joint
- 1010
- GrundplatteBase plate
- 1111
- Vorsprunghead Start
- 1212
- FührungsschieneGuide rail
- 1313
- Motorengine
- 1414
- Spindelspindle
- 1515
- TuchCloth
- 1616
- TuchspendeeinrichtungCloth dispenser
- 1717
- TuchaufnahmeeinrichtungCloth receiving device
- 1818
- Motorengine
- 1919
- Vertiefungdeepening
- 2020
- ZahnTooth
- 2121
- TintenstrahldruckerInkjet printer
- 2222
- DruckkopfunterseitePrinthead bottom
- 2323
- Spaltgap
Claims (10)
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DE102022129512.5A DE102022129512A1 (en) | 2022-11-08 | 2022-11-08 | Device for cleaning a print head, inkjet printer and method for cleaning a print head |
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EP4368399A1 true EP4368399A1 (en) | 2024-05-15 |
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EP23207833.7A Pending EP4368399A1 (en) | 2022-11-08 | 2023-11-06 | Print head cleaning device, inkjet printer, and method for cleaning print head |
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DE (1) | DE102022129512A1 (en) |
Citations (7)
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JP2001071513A (en) * | 1999-09-07 | 2001-03-21 | Canon Inc | Ink jet recorder |
US20050156995A1 (en) * | 2004-01-20 | 2005-07-21 | Konica Minolta Medical & Graphic, Inc. | Inkjet printer |
JP2012143947A (en) * | 2011-01-11 | 2012-08-02 | Sii Printek Inc | Liquid wiping unit, and liquid jetting apparatus |
EP2839961A1 (en) * | 2012-04-20 | 2015-02-25 | Seiko I Infotech Inc. | Inkjet printer |
EP3144152A1 (en) * | 2015-09-18 | 2017-03-22 | Seiko Epson Corporation | Liquid ejecting apparatus and cleaning device |
DE102015220943A1 (en) | 2015-10-27 | 2017-04-27 | Bundesdruckerei Gmbh | Apparatus and method for cleaning a printhead |
EP3450177A1 (en) * | 2017-09-04 | 2019-03-06 | Krones AG | Cleaning station for a direct printing unit |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US4853717A (en) | 1987-10-23 | 1989-08-01 | Hewlett-Packard Company | Service station for ink-jet printer |
JP2003291359A (en) | 2002-04-03 | 2003-10-14 | Seiko Instruments Inc | Maintenance mechanism of ink jet head |
JP4626264B2 (en) | 2004-10-28 | 2011-02-02 | ブラザー工業株式会社 | Recording head storage device and storage method |
-
2022
- 2022-11-08 DE DE102022129512.5A patent/DE102022129512A1/en active Pending
-
2023
- 2023-11-06 EP EP23207833.7A patent/EP4368399A1/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001071513A (en) * | 1999-09-07 | 2001-03-21 | Canon Inc | Ink jet recorder |
US20050156995A1 (en) * | 2004-01-20 | 2005-07-21 | Konica Minolta Medical & Graphic, Inc. | Inkjet printer |
JP2012143947A (en) * | 2011-01-11 | 2012-08-02 | Sii Printek Inc | Liquid wiping unit, and liquid jetting apparatus |
EP2839961A1 (en) * | 2012-04-20 | 2015-02-25 | Seiko I Infotech Inc. | Inkjet printer |
EP3144152A1 (en) * | 2015-09-18 | 2017-03-22 | Seiko Epson Corporation | Liquid ejecting apparatus and cleaning device |
DE102015220943A1 (en) | 2015-10-27 | 2017-04-27 | Bundesdruckerei Gmbh | Apparatus and method for cleaning a printhead |
EP3450177A1 (en) * | 2017-09-04 | 2019-03-06 | Krones AG | Cleaning station for a direct printing unit |
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