DE102018132817B4 - Device and method for printing with at least one print head - Google Patents

Abstract

Device for printing with at least one printing device (01) with at least one print head (03), wherein the at least one print head (03) comprises an exit surface (11), the exit surface (11) having at least one first exit opening (12), at least one second Outlet opening (13) and at least one third outlet opening (14), each with a focus, wherein an x-direction (x) and a y-direction (y) and a z-direction (z) form a Cartesian coordinate system, the x - direction (x) in a plane of the exit surface (11) is parallel to a longitudinal axis (07) of the at least one print head (03), the exit surface (11) comprising at least one envelope (21, 22), the envelope (21 , 22) comprises an area between a first tangent (21) and a second tangent (22), the first tangent (21) and the second tangent (22) being tangents (21, 22) at the boundary of the first outlet opening (12 ) abut and each other r are parallel and parallel to the y-direction (y) and spaced apart from one another, the first outlet opening (12) being designed as a reference opening (12), the second outlet opening (13) being arranged in a first position or a second position, wherein in the first position the at least one envelope (21, 22) in each case completely encloses the area of the reference opening (12) and at least the area of the at least one second outlet opening (13) by a maximum of 20%, wherein in the second position the at least one Envelope (21, 22) completely covers the area of the reference opening (12) and at least covers at least 70% of the area of the at least one second outlet opening (13), with a first direction (23) in the first position describing a straight line which is the center of gravity straight line (23) of the first position is formed and is fixed by at least the center of gravity of the first outlet opening (12) and the center of gravity of the second outlet opening (13). is laid, wherein a second direction in the second position of the at least one second outlet opening (13) describes the centroid straight line 24 of the second position, which runs through the center of gravity of the first outlet opening (12) and the center of gravity of the second outlet opening (13) in the second position is defined, the y-direction (y) being a direction in a plane of the exit surface (11) which corresponds to a projection of a transport direction (T) in the plane of the exit surface (11) along a transport path, the y-direction (y ) is parallel to the transport direction (T), the transport direction (T) being the direction in which a printing material (08) is transported if it is present at any point on a transport path, characterized in that the at least one second outlet opening (13) in the y-direction (y) behind the at least one first outlet opening (12) is arranged that the second direction (24) to the first Ri direction (23) by an opening angle (γ) of the straight line (23; 24) is inclined to one another, that the opening angle (γ) of the centroid lines (23; 24) to one another is greater than 0° and a maximum of 1°, that the printing device (01) comprises at least ten print heads (03) which are arranged on a longitudinal axis (07) are arranged side by side and extend over the entire working width of the printing device (01), that the positioning in the first position and the positioning in the second position takes place on the basis of image data on which the printing on a printing material (08) is based and by a control device be transmitted to the at least one print head (03).

Description

The invention relates to a device for printing with at least one print head according to the preamble of claim 1 and a method for positioning an exit surface of a print head in a device for printing according to claim 7.

through the US 2010/0073424 A1 a device and a method are known in which a printing device is tilted about an x-direction in order to increase the resolution in the x-direction.

through the DE 603 04 296 T2 a printhead of a printer is known which has a plurality of substantially parallel column arrays of nozzles and which prints drops from nozzles in different columns during a single printing pass of the printhead onto the same row of print medium. The print head is rotatable from a first position for high resolution along a media advance axis to a second position for higher speed printing or more reliable printing and vice versa.

the U.S. 2004/0 263 563 A1 relates to a printhead comprising a column of nozzles oriented at an angle to an axis of relative movement between the printhead and a substrate.

The object of the invention is to create a device and a method for printing.

The object is achieved according to the invention by the features of claim 1 and the features of claim 7.

The advantages that can be achieved with the invention are, in particular, that an increase in the redundancy of outlet openings of at least one outlet surface is made possible. For example, at least two different operating states are possible, with a different number of outlet openings being used for printing on a printing material.

Advantageously, for example, a second outlet opening is available as a replacement and replaces a first outlet opening used if it has an at least partial defect and/or an at least temporary malfunction.

Also advantageous is, for example, a variance in the possible resolutions in the x-direction and in the transport direction due to the displacement of at least one exit surface from a first position to a second position.

Further advantages can be seen from the following description.

Exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

• 1 eine Vorrichtung zum Drucken mit mindestens einem Druckkopf und einer Führung zum Führen eines Bedruckstoffes;
• 2 eine Anordnung von mindestens drei Austrittsöffnungen in einer Austrittsfläche;
• 3 eine Austrittsfläche mit mindestens drei Austrittsöffnungen und einer Einhüllenden einer ersten Austrittsöffnung;
• 4 eine Relative Lage einer ersten Austrittsöffnung zu einer zweiten Austrittsöffnung in einer ersten Position und einer zweiten Position;
• 5 Positionen der Tropfen auf dem Bedruckstoff:
  1. (a) in dem zweiten Betriebszustand,
  2. (b) in dem dritten Betriebszustand mit gleicher Geschwindigkeit des Bedruckstoffes zu der Geschwindigkeit des Bedruckstoffes in dem zweiten Betriebszustand,
  3. (c) in dem dritten Betriebszustand mit höherer Geschwindigkeit des Bedruckstoffes zu der Geschwindigkeit des Bedruckstoffes in dem zweiten Betriebszustand;
• 6 eine schematische Anordnung einer Druckeinrichtung in der ersten Position mit mindestens zwei nebeneinander entlang der x-Richtung angeordneten Druckköpfen;
• 7 eine schematische Anordnung einer Druckeinrichtung in der zweiten Position, wobei jeweils die Druckköpfe um eine Schwenkachse einzeln verschwenkt in der zweiten Position positioniert sind;
• 8 eine schematische Anordnung einer Druckeinrichtung in der zweiten Position, wobei die Druckköpfe um eine gemeinsame Schwenkachse verschwenkt in der zweiten Position positioniert sind;
• 9 eine Austrittsfläche eines Druckkopfes mit Austrittsöffnungen.

Show it:

• 1 a device for printing with at least one print head and a guide for guiding a printing material;
• 2 an arrangement of at least three exit openings in an exit surface;
• 3 an exit surface with at least three exit openings and an envelope of a first exit opening;
• 4 a relative position of a first outlet opening to a second outlet opening in a first position and a second position;
• 5 Positions of the drops on the substrate:
  1. (a) in the second operating condition,
  2. (b) in the third operating state with the same speed of the printing material as the speed of the printing material in the second operating state,
  3. (c) in the third mode of operation at a higher speed of the substrate to the speed of the substrate in the second mode of operation;
• 6 a schematic arrangement of a printing device in the first position with at least two print heads arranged next to one another along the x-direction;
• 7 a schematic arrangement of a printing device in the second position, wherein each of the print heads are positioned individually pivoted about a pivot axis in the second position;
• 8th a schematic arrangement of a printing device in the second position, wherein the print heads are pivoted about a common pivot axis positioned in the second position;
• 9 an exit surface of a print head with exit openings.

A printing device comprises at least one printing unit 01 and at least one guide 02 for guiding at least one printing material 08. Printing unit 01, which is designed in particular as a non-impact printing device 01, comprises at least one print head 03, preferably at least one inkjet print head 03. The at least one print head 03 comprises at least one exit surface 11.

In the foregoing and in the following, a printing material 08 is a substrate that can be printed on with a medium by the at least one printing unit 01. Printing material 08 is embodied as paper and/or cardboard and/or foil, for example. The printing material 08 is designed in particular as a web or sheet.

Printing unit 01 comprises at least ten print heads 03, which are arranged next to one another, in particular adjacent to and/or adjacent to one another, on a longitudinal axis 07 and which extend over the entire working width of printing unit 01. In particular, at least two print heads 03, preferably at least four print heads 03, of the printing unit 01 are arranged next to one another in an x-direction x, for example, and/or are connected to one another via a fixed axis, for example, in the x-direction x to form a group of print heads 03.

The x-direction x and a y-direction y and a z-direction z form a Cartesian coordinate system with an origin. The y-direction y is a direction in a plane of the exit surface 11, which corresponds to a projection of a transport direction T in the plane of the exit surface 11 along the transport path. The x-direction x is orthogonal to the y-direction y within the plane of the exit surface 11 . The z-direction z is parallel to a normal vector of a plane that is spanned by the x-direction x and the y-direction y, and points in the direction of the guide 02 for guiding the printing material 08.

The longitudinal axis 07 of the at least one print head 03, in particular the longitudinal axis 07 of at least three adjacent print heads 03, preferably the longitudinal axis 07 of at least ten adjacent print heads 03, is an axis which is arranged within the plane of the exit surface 11 orthogonally to the y-direction y is. The x-direction x of the coordinate system is in particular parallel to the longitudinal axis 07. The longitudinal axis 07 is in particular parallel to the working width. Furthermore, the longitudinal axis 07 is preferably orthogonal to the projection of the transport direction T in the plane of the exit surface 11 at the location of the smallest distance from the print head 03 to the transport path.

The working width is, above and below, the maximum width of at least one exit surface 11 in the x-direction x, which is used in particular, for example, for printing the printing material 08.

The spatial area provided for the transport of a printing substrate 08, which the printing substrate 08 occupies at least partially when it is present, is the transport path. The transport path is defined by means of transport, in particular by the guide 02, preferably at least one roller and/or at least one support and/or at least one other device for guiding the printing material 08 when the printing device is in an operating state.

The transport direction T is a direction provided for operation, in which the printing material 08 is transported if it is present at any point along the transport path. A transverse direction is the axial direction orthogonal to the transport direction T. Preferably, for example, the transport direction T is parallel to the y-direction y and/or, for example, the transverse direction is parallel to the x-direction x of the Cartesian coordinate system in the location of the smallest distance from the print head 03 to the transport route.

The printing plane is a plane which is parallel to a plane on the surface facing the print head 03 at the point of impingement of the printing fluid, which is spanned by the guide 02 of the printing material 08. The impact point of the printing fluid, in particular a drop 27 of the printing fluid, is a location on the printing substrate 08 at which the printing fluid, when the print head 03 is in operation, strikes the printing substrate 08 in the event that it is present due to the direction in which the printing fluid is flying. The flight direction of the pressure fluid is defined by a component parallel to the transport direction T and a component orthogonal to the transport direction T.

In the foregoing and below, a printing fluid refers to inks, printing inks and/or varnishes, as well as other materials, which are and/or can be transferred to a printing substrate 08 by a printing machine or device for printing. In particular, a printing fluid located, for example, in a cavity of print head 03, in particular inkjet print head 03, in particular in the form of drops 27, can exit the cavity of print head 03 through an outlet opening 12; 13; 14 left.

The at least one print head 03 comprises at least one exit surface 11. The exit surface 11 of a print head 03 is a surface of the print head 03 which faces the transport path and lies in particular in a plane whose normal vector is arranged parallel to the z-direction z. The exit surface 11 is preferably parallel to the Print level arranged. The exit surface 11 is designed, for example, as a parallelogram, preferably as a non-rectangular parallelogram. A further exemplary embodiment of the exit surface 11 is an ellipse, in particular a circle.

The exit surface 11 is bounded by a first boundary line 16 and a second boundary line 17, which form a stationary system in relation to one another. A stationary system means that the first boundary line 16 and the second boundary line 17 are not movable in relation to one another, but can be displaced in space as a system, ie in combination with one another. In the case of an elliptical exit surface 11, the first boundary line 16 and the second boundary line 17 correspond to the tangents to the exit surface 11, which intersect at a point of intersection, in particular at the origin of the Cartesian coordinate system. In the case of an exit surface 11, which is designed as a parallelogram, the first boundary line 16 corresponds to a first edge of the exit surface 11 and the second boundary line 17 to a second edge of the exit surface 11, which intersect at an intersection point, the intersection point in particular at one corner of the corresponds to the parallelogram that has the smallest distance to the origin of the Cartesian coordinate system. Preferably, the origin of the Cartesian coordinate system is identical to the point of intersection of the first boundary line 16 and the second boundary line 17.

In a preferred exemplary embodiment, the first limiting line 16 is in particular arranged parallel to the x-direction x. The second boundary line 17 is inclined to the first boundary line 16 by an opening angle β of the second boundary line 17 to the first boundary line 16, in particular an acute-angled opening angle β of the second boundary line 17 to the first boundary line 16.

The distance from the print head 03 to the transport path is, above and below, the shortest distance from the exit surface 11 of the print head 03 to the printing plane and corresponds to the component of the flight direction of the printing fluid orthogonal to the transport direction T and parallel to the z-direction z.

The exit surface 11 comprises at least one first exit opening 12, at least one second exit opening 13 and at least one third exit opening 14, each with a focal point. The outlet openings 12; 13; 14 of a print head 03 identical sizes and geometries. The focus of an outlet opening 12; 13; 14 is the geometric centroid of this outlet opening 12; 13; 14. The at least one first outlet opening 12, at least one second outlet opening 13 and at least one third outlet opening 14 are preferably in the outlet surface 11 in at least one row 18 and/or in at least one column 19 and/or in a combination of at least one row 18 and at least one column 19 arranged. The at least one second outlet opening 13 is arranged behind the at least one first outlet opening 12 in the y-direction y, for example in a row 18 that differs from the first outlet opening 12 .

A line 18 is a straight line and is defined in particular by at least two focal points of the outlet openings 12, 14. The line 18 is preferably arranged in the plane of the exit surface 11 parallel to the first delimitation line 16 . The distance D18 between two adjacent outlet openings 12; 14 within a line 18 is preferably constant. The exit surface 11 comprises, for example, at least one row 18, preferably at least two rows 18, the rows 18 being parallel to one another. The distance D18.1 between two adjacent rows 18 from one another in the y-direction y is preferably constant.

The distance D18; D19 two outlet openings 12; 13; 14 of an exit surface 11 to one another is the shortest distance between the boundaries of the exit openings 12; 13; 14 to each other can be formed.

A column 19 is a straight line and is defined in particular by at least two focal points of the outlet openings 12, 13. The focal points of at least two outlet openings 12; 13 of an exit surface 11 are preferably arranged in a column 19 in a straight line one behind the other in the exit surface 11 . The column 19 is, for example, in the plane of the outlet surface 11 inclined to the first delimitation line 16 and, for example, parallel to the second delimitation line 17. The distance D19 between two adjacent outlet openings 12, 13 within a column 19 is preferably constant. The exit surface 11 comprises, for example, at least one column 19, preferably at least two columns 19, the at least two columns 19 preferably being parallel to one another and adjacent columns 19 having the distance D19.1 from one another in the x-direction x.

The focus of an outlet opening 12; 13; 14 is, for example, an element of a row 18 and a column 19 in an exit surface 11.

The exit surface 11 comprises at least one envelope 21, 22, the envelope 21, 22 being an area between a first tangent 21 and a second tangent 22 includes. The first tangent 21 and the second tangent 22 are tangents 21; 22 at the boundary of the first outlet opening 12, which is defined as a reference opening 12, and are parallel to each other and spaced apart. The distance between the first tangent 21 and the second tangent 22 is greater than zero. The first tangent 21 and the second tangent 22 are parallel to the y-direction y.

The at least one second outlet opening 13 of an outlet surface 11 is arranged in a first position, for example. In the first position, the at least one envelope 21, 22 covers the area of the reference opening 12 completely and at least the area of the at least one second outlet opening 13 by a maximum of 20%. In the first position, the at least one second outlet opening 13 is preferably not arranged in an overlapping manner in the y-direction y, more preferably not in alignment with the reference opening 12 .

Within this application, an arrangement in alignment means that the at least one envelope 21, 22 encompasses at least the area of the at least one second outlet opening 13 by at least 90%, in particular 100%. Overlapping in the y-direction y denotes that the at least one envelope 21, 22 in each case encompasses at least the area of the at least one second outlet opening 13 by at least 70%.

A first direction 23 describes a straight line in the first position, which is designed as a straight line 23 of the center of gravity of the first position and is defined by at least the center of gravity of the first outlet opening 12 and the center of gravity of the second outlet opening 13 . The first direction 23 is inclined to the x-direction x and/or to the y-direction y, for example. The first direction 23 is preferably inclined to the x-direction x by an opening angle δ of the first direction 23 to the x-direction x. The opening angle δ of the first direction 23 to the x-direction x is preferably at least 0° and preferably at most 90°, in particular at most 45°.

A projection of all outlet openings 12; 13; 14 of an exit surface 11 in a projection plane whose normal vector is parallel to the y-direction y, generated in each case for an exit opening 12; 13; 14 a projection point in the projection plane. The projection points are in particular elements of a straight line in the projection plane, the straight line being parallel to the x-direction x.

In the foregoing and in the following, the resolution in the transverse direction denotes the ratio of the number of projection points per unit length, the projection points being elements of a straight line in the projection plane, the straight line being parallel to the x-direction x and the normal vector of the projection plane being parallel to the y -direction y is. The resolution unit is dpi (dots per inch).

In the first position of the at least one second outlet opening 13, the at least one print head 03 has a maximum resolution in the transverse direction. This maximum resolution in the transverse direction is achieved when, in particular, each outlet opening 12; 13; 14 generates a projection point, which is an element of a straight line in the projection plane, in the projection plane, the position of which is identical to the position of no other projection point. For example, the maximum resolution of a print head 03 in the transverse direction is at least 800 dpi, in particular at least 1,000 dpi, preferably 1,200 dpi in the first position.

The at least one second outlet opening 13 of an outlet surface 11 is arranged in a second position, for example. In the second position, the at least one envelope 21, 22 covers the area of the reference opening 12 completely and at least the area of the at least one second outlet opening 13 to at least 70%. The at least one envelope 21, 22 preferably encompasses at least the area of the at least one second outlet opening 13 by at least 90%.

In the second position, the surface of the at least one second exit surface 11 lies at least partially within the envelope 21, 22 of the reference opening 12. The second exit opening 13 is preferably arranged in a row 18 in the y-direction y behind the reference opening 12. In particular, the second outlet opening 13 overlaps in the y-direction y, preferably arranged in alignment with the reference opening 12 in the second position. The envelope 21, 22 of the reference opening 12 is arranged parallel to the y-direction y in the second position. The y-direction y is preferably parallel to the transport direction T.

In the second position, for example, at least 30% of the first outlet openings 12 of the at least one print head 03 are assigned to at least one second outlet opening 13, with the area of the at least one second outlet opening 13 being separated from the envelope 21, 22 of the respective reference opening 12, i.e. the respective first outlet opening 12, is comprised of at least 70%.

In the second position of the at least one second outlet opening 13, a second direction 24 describes the straight line 24 of the center of gravity of the second position, which passes through the center of gravity of the first th outlet opening 12 and the focus of the second outlet opening 13 is fixed in the second position. The second direction 24 is to the first direction 23 by an opening angle γ of the centroid line 23; 24 inclined to each other. It is the line of gravity 24 of the second position to the line of gravity 23 of the first position by the opening angle γ of the line of gravity 23; 24 inclined to each other. The opening angle γ of the straight line 23; 24 to one another is greater than 0° and at most 1°, preferably at most 0.2°.

In the second position of the at least one second outlet opening 13, the at least one print head 03 has a resolution in the transverse direction that is lower than the maximum resolution in the transverse direction generated in the first position. This lower resolution in the transverse direction is due to the fact that the projection points of at least one reference opening 12 and at least one second exit opening 13 overlap. In this case, the overlap in the second position corresponds to the surface area of the at least one second outlet opening 13 which the envelope 21, 22 of the reference opening 12 encompasses. For example, the resolution of a print head 03 in the transverse direction is a maximum of 1,000 dpi, in particular a maximum of 800 dpi, preferably 600 dpi, in the second position.

In one exemplary embodiment of the positioning of the at least one exit surface 11, at least one second exit opening 13 of the at least one exit surface 11 of at least one print head 03 is positioned in the second position, for example. Preferably, at least one exit surface 11 is positioned in the second position. At least one print head 03 of printing unit 01 is preferably positioned in the second position of the at least one second outlet opening 13. More preferably, at least one group of print heads 03 is positioned in the second position. More preferably, all print heads 03 of at least one printing device 01, in particular all groups of print heads 03 of a printing device 01, are positioned in the second position, so that all print heads 03 of a printing device 01 are positioned across the maximum working width in the second position.

The at least one second exit opening 13 of the exit surface 11 of the at least one print head 03 is positioned in the first position. In the first position, the first direction 23 is inclined, for example, to the x-direction x by the opening angle δ of the first direction 23 to the x-direction x. By shifting from the first position, in particular by pivoting about a pivot axis 26, in a plane whose normal vector is parallel to the z-direction z, by the opening angle γ of the centroid line 23; 24 to each other, the line of gravity 23 of the first position is converted into the line of gravity 24 of the second position. The pivot axis 26 is an axis parallel to the z-direction z. In the second position, the second direction 24 is to the first direction 23 by the opening angle γ of the centroid straight line 23; 24 positioned inclined to each other.

The resolution in the transport direction T is determined, for example, by the ratio of the exit rate of at least one droplet 27 from an exit opening 12; 13; 14 to the speed of the printing material 08 in the transport direction T. This means that the resolution in the transport direction T is increased, for example, by a higher exit rate of at least one droplet 27 at a constant speed of the printing substrate 08 or by a lower speed of the printing substrate 08 at a constant exit rate of at least one droplet 27. The maximum exit rate is, for example, the maximum number of drops 27 that have an exit opening 12; 13; 14 can leave per unit of time.

In a first operating state, the at least one second outlet opening 13 of the outlet surface 11 is arranged in the first position. The resolution in the transport direction T is preferably maximum in the first operating state. For example, the maximum resolution in the transport direction T in the first operating state is at least 800 dpi, in particular at least 1000 dpi, preferably at least 1200 dpi.

Preferably, an outlet opening 12; 13; 14 each assigned an exciter for ejecting at least one drop 27 of the pressure fluid. In the first operating state, the maximum number of exciters is more preferably activated, as a result of which, for example, the maximum resolution can be generated in the transverse direction.

In a second operating state, the outlet surface 11 is in the second position by moving the at least one second outlet opening 13 from the first position to the second position, in particular by pivoting about the pivot axis 26 by the opening angle γ of the straight line 23; 24 to each other.

In the second operating state, for example, for each envelope 21, 22, exactly one outlet opening 12, for example the reference opening 12, whose area is covered by at least one envelope 21, 22 by at least 70%, is used for the emergence of at least one droplet 27. The at least one other outlet opening 13; 14, for example the second outlet opening 13, the area of which is additionally covered by at least 70% of the envelope 21, 22, is not used for the emergence of at least one droplet 27 and/or serves, for example, as a replacement, in particular if there is an at least partial defect and/or an at least temporary disruption of the exit opening 12 used is present.

The speed of printing material 08 in transport direction T is, for example, identical to the speed of printing material 08 in transport direction T in the first operating state. The resolution in the transport direction T in the second operating state is preferably different from the resolution in the transport direction T in the first operating state, in particular smaller. For example, the resolution in the transport direction T in the second operating state is a maximum of 1000 dpi, in particular a maximum of 800 dpi, preferably 600 dpi.

In the second operating state, a number of exciters is preferably activated, the number of activated exciters in the second operating state being smaller than the number of activated exciters in the first operating state, in particular the number of activated exciters in the second operating state being smaller than the maximum number of pathogens that are available. The controlled number of exciters in the second operating state preferably corresponds to at least one outlet opening 12; 13; 14 per envelope 21, 22.

In a third operating state, the at least one second outlet opening 13 of the outlet surface 11 is preferably arranged in the second position. In the third operating state, at least two outlet openings 12; 13, for example, the reference opening 12 and/or at least one second outlet opening 13, the surfaces of the at least two outlet openings 12; 13 are at least 70% covered by at least one envelope 21, 22, used for the emergence of at least two drops 27. The controlled number of exciters in the third operating state preferably corresponds to at least two outlet openings 12; 13 per envelope 21, 22 of the at least one exit surface 11.

In a first exemplary embodiment of the third operating state, the centers of gravity of the at least two drops 27 that emerge from the first outlet opening 12 and/or the at least one second outlet opening 13 of an envelope 21, 22 are positioned on printing substrate 08 at a distance from one another. Both alternatively and in combination, the at least one droplet 27 of the first outlet opening 12 and the at least one droplet 27 of the at least one second outlet opening 13 of an envelope 21, 22 emerge from the respective outlet opening 12 at different times and/or at the same time; 13 out. The speed of printing material 08 in transport direction T is, for example, identical to the speed of printing material 08 in transport direction T in the second operating state. The resolution in the transport direction T in the first exemplary embodiment of the third operating state is preferably higher than the resolution in the transport direction T in the second operating state. For example, the resolution in transport direction T in the first exemplary embodiment of the third operating state is at least 800 dpi, in particular at least 1,000 dpi, preferably at least 1,200 dpi, more preferably the resolution in transport direction T is identical to the resolution in transport direction T in the first operating state.

In a second, alternative exemplary embodiment of the third operating state, for example, the speed of the printing material 08 in the transport direction T is higher, in particular twice as high, as the speed of the printing material 08 in the transport direction T in the second operating state. The resolution in the transport direction T in the second exemplary embodiment of the third operating state is, for example, a maximum of 1000 dpi, in particular a maximum of 800 dpi, preferably 600 dpi, and/or is identical to the resolution of the second operating state.

the 5 shows possible distributions of the ejected drops 27 in the y-direction y on the printing material 08 in the second operating state (a) and in the third operating state (b, c). In the second operating state, for example, only one outlet opening 12; 13 per envelope 21, 22 for drop ejection in use. The adjacent drops 27 are at a distance greater than zero from one another on printing substrate 08 and are discharged through the at least one first outlet opening 12, represented by 1 in 5a) , or the at least one second outlet opening 13, represented by 2 in 5a) , submitted. The resolution in the transport direction T is lower than the maximum resolution in the transport direction T. In the third operating state, for example, at least two outlet openings 12; 13 per envelope 21, 22 for drop ejection in use. 5b) shows an alternating arrangement of the droplets 27 on the printing substrate 08, which are emitted from the first outlet opening 12, represented by 1, and the second outlet opening 13, represented by 2, for example. A maximum resolution in the transport direction T is possible. In an alternative embodiment of the third operating state, 5c ), the speed of the printing material 08 is reduced compared to the alternative version, 5b) , elevated. This increases the distance between the drops 27 in arranged on the printing substrate 08 5c ) compared to the spacing of the drops 27 in 5b) with the same ejection frequency of the drops 27 from the at least two outlet openings 12; 13.

In the second operating state and/or the third operating state, at least one second outlet opening 13 of at least one outlet surface 11 of at least one print head 03 of the printing unit 01 is positioned in the second position.

At least one exit surface 11 of the at least one print head 03 is positioned in the second position. In particular, the at least one print head 03 of the printing unit 01 is positioned in the second position. Furthermore, at least one group of print heads 03 is preferably positioned in the second operating state in the second operating state and/or the third operating state. Furthermore, in the second operating state and/or the third operating state, all of the print heads 03 of a printing device 01, in particular all of the groups of print heads 03 of a printing device 01, are preferably positioned in the second position, so that all of the print heads 03 of a printing device 01 have the maximum working width in the second Position are positioned.

The device for printing preferably comprises an inspection device. The inspection system detects the printed printing substrate 08 at least partially across the working width in the transport direction T downstream of the printing unit 01 and detects, for example, an at least temporary disruption and/or an at least partial defect in at least one outlet opening 12 used; 13; 14, in particular the reference opening 12. For example, in the event of an at least temporary malfunction and/or an at least partial defect in an outlet opening 12 used during operation of the device for printing in the first position, the at least one print head 03 is moved from the first position to the second position shifted, whereby a second outlet opening 13 is used instead of the first outlet opening 12 with at least partial defect and/or at least temporary disturbance for the ejection of at least one droplet 27 . For example, the device for printing is thus operated in the second operating state.

The positioning in the first position and the positioning in the second position takes place on the basis of image data on which the printing on the printing material 08 is based and which is transmitted by a control device to the at least one print head 03 and preferably additionally to the guide 02 of the printing material 08. In addition, operation in the first operating state and/or operation in the second operating state and/or operation in the third operating state preferably takes place on the basis of image data on which the printing on printing substrate 08 is based and preferably by a control device on the at least one print head 03 and/or the guide 02 of the printing material 08 are transferred. In one exemplary embodiment, the printing device is operated in the second operating state, for example, with the speed of the printing material 08 being identical to the speed of the printing material 08 in the first operating state, for example. For example, following operation in the second operating state, the device for printing is operated in the third operating state on the basis of the stored image data.

Reference List

01

printing device; Non-impact printing device

02

guide

03

print head; Inkjet print head

04

-

05

-

06

-

07

longitudinal axis

08

substrate

09

-

10

-

11

exit surface

12

exit port, first; reference opening

13

exit opening, second

14

exit opening, third

15

-

16

boundary line, first

17

bounding line, second

18

Line

19

Split

20

-

21

tangent, first; enveloping

22

tangent, second; enveloping

23

direction, first; Center of gravity line of the first position

24

direction, second; Center of gravity straight line of the second position

25

-

26

pivot axis

27

drops

D18

Distance between two adjacent outlet openings in a row

D19

Distance between two adjacent outlet openings in a column

D18.1

Distance between two adjacent lines in the y-direction

D19.1

Distance between two adjacent columns in the x-direction

x

x direction

y

y direction

e.g

z direction

T

transport direction

β

Opening angle of the second boundary line to the first boundary line

δ

Opening angle of the first direction to the x-direction

g

Opening angle of the centroid lines to each other

Claims (11)

Device for printing with at least one printing device (01) with at least one print head (03), wherein the at least one print head (03) comprises an exit surface (11), the exit surface (11) having at least one first exit opening (12), at least one second Outlet opening (13) and at least one third outlet opening (14), each with a focus, wherein an x-direction (x) and a y-direction (y) and a z-direction (z) form a Cartesian coordinate system, the x - direction (x) in a plane of the exit surface (11) is parallel to a longitudinal axis (07) of the at least one print head (03), the exit surface (11) comprising at least one envelope (21, 22), the envelope (21 , 22) comprises an area between a first tangent (21) and a second tangent (22), the first tangent (21) and the second tangent (22) being tangents (21, 22) at the boundary of the first outlet opening (12 ) abut and each other r are parallel and parallel to the y-direction (y) and spaced apart from one another, the first outlet opening (12) being designed as a reference opening (12), the second outlet opening (13) being arranged in a first position or a second position, wherein in the first position the at least one envelope (21, 22) in each case completely encloses the area of the reference opening (12) and at least the area of the at least one second outlet opening (13) by a maximum of 20%, wherein in the second position the at least one Envelope (21, 22) completely covers the area of the reference opening (12) and at least covers at least 70% of the area of the at least one second outlet opening (13), with a first direction (23) in the first position describing a straight line which is the center of gravity straight line (23) of the first position is formed and is fixed by at least the center of gravity of the first outlet opening (12) and the center of gravity of the second outlet opening (13). is laid, wherein a second direction in the second position of the at least one second outlet opening (13) describes the centroid straight line 24 of the second position, which runs through the center of gravity of the first outlet opening (12) and the center of gravity of the second outlet opening (13) in the second position is defined, the y-direction (y) being a direction in a plane of the exit surface (11) which corresponds to a projection of a transport direction (T) in the plane of the exit surface (11) along a transport path, the y-direction (y ) is parallel to the transport direction (T), the transport direction (T) being the direction in which a printing material (08) is transported if it is present at any point on a transport path, characterized in that the at least one second outlet opening (13) is arranged in the y-direction (y) behind the at least one first outlet opening (12), that the second direction (24) to the first R direction (23) by an opening angle (γ) of the straight line (23; 24) is inclined to one another, that the opening angle (γ) of the centroid lines (23; 24) to one another is greater than 0° and a maximum of 1°, that the printing device (01) comprises at least ten print heads (03) which are arranged on a longitudinal axis (07) are arranged side by side and extend over the entire working width of the printing device (01), that the positioning in the first position and the positioning in the second position takes place on the basis of image data on which the printing on a printing material (08) is based and by a control device be transmitted to the at least one print head (03). device after claim 1 , characterized in that in the second position at least 30% of the first outlet openings (12) of at least one print head (03) are assigned at least one second outlet opening (13), the area of which is defined by the envelope (21, 22) of the respective reference opening (12 ) is covered by at least 70%, and/or that in the second position the at least one envelope (21, 22) covers at least the area of the at least one second outlet opening (13). 90% and/or that at least one print head (03) of at least one printing device (01) is positioned in the second position. device after claim 1 and/or 2, characterized in that in the first position the at least one second outlet opening (13) is not aligned with the reference opening (12) and that in the second position the at least one second outlet opening (13) is aligned with the Reference opening (12) is arranged. device after claim 1 and/or 2 and/or 3, characterized in that the at least one print head (03) is designed in the first position with a maximum resolution in a transverse direction, the transverse direction corresponding to an axial direction orthogonal to the transport direction (T), and that the at least one print head (03) is designed with a resolution in the transverse direction in the second position, the resolution in the transverse direction in the second position being lower than the maximum resolution in the transverse direction and/or being a maximum of 1,000 dpi. device after claim 1 and/or 2 and/or 3 and/or 4, characterized in that at least one group of print heads (03) of at least one printing device (01) is positioned in the second position and/or that all print heads (03) of at least one printing device ( 01) are positioned in the second position over a maximum working width, the maximum working width being the maximum width of the at least one exit surface (11) in the x-direction (x). device after claim 1 and/or 2 and/or 3 and/or 4 and/or 5, characterized in that in each case a first outlet opening (12) and a second outlet opening (13) and a third outlet opening (14) have an exciter for ejecting a drop (27 ) is assigned and that in the first operating state the maximum number of exciters is activated and that in the second operating state a number of exciters less than the maximum number of exciters is activated and that in a third operating state the at least one exit surface (11) in the second position and the maximum number of exciters is controlled, that in the first operating state the at least one second outlet opening (13) of the outlet surface (11) is arranged in the first position, that in the second operating state the outlet surface (11) is in the second position by moving the at least one second outlet opening (13) from the first position to the second position is that in the third operating state the speed of the printing material (08) in the transport direction (T) is identical to the speed of the printing material (08) in the transport direction (T) in the second operating state, with the resolution in the transport direction (T) in the third operating state is higher than the resolution in the transport direction (T) of the second operating state, or that in the third operating state the speed of the printing material (08) in the transport direction (T) is higher than the speed of the printing material (08) in the transport direction (T) in the second operating state, the resolution in the transport direction (T) in the third operating state being identical to the resolution of the second operating state. Method for positioning at least one exit surface (11) of at least one print head (03) in a printing device, wherein a printing device (01) comprises the at least one print head (03), with an x-direction (x) and a y-direction ( y) and a z-direction (z) form a Cartesian coordinate system, the x-direction (x) being in a plane of the exit surface (11) parallel to a longitudinal axis (07) of the at least one print head (03), the exit surface (11) comprises at least one first outlet opening (12), at least one second outlet opening (13) and at least one third outlet opening (14), each with a center of gravity, wherein a center of gravity straight line (23, 24) through at least the center of gravity of the first outlet opening (12) and the focus of the second outlet opening (13) is fixed, wherein in a first operating state, the at least one second outlet opening (13) is positioned in a first position, wherein the Schwe r point straight (23) in the first position to the x-direction (x) and / or the y-direction (y) is inclined, wherein in a second operating state the at least one second outlet opening (13) is positioned in a second position, wherein the at least one exit surface (11) is brought into the second position by moving the second exit opening (13) from the first position in a plane whose normal vector is parallel to the z-direction (z), wherein the centroid straight line (24 ) in the second position is positioned inclined by an opening angle (γ) of the straight line (23, 24) to the straight line (23) in the first position, the y-direction (y) being parallel to a transport direction (T), wherein the transport direction (T) is designed as the direction in which a printing material (08) is transported if it is present at any point on a transport path, characterized in that the at least one z wide outlet opening (13) is arranged in the y-direction (y) behind the at least one first outlet opening (12), that the opening angle (γ) of the centroid straight lines (23, 24) to one another is greater than 0° and a maximum of 1°, that the printing device (01) comprises at least ten print heads (03), which are arranged side by side on the longitudinal axis (07). are arranged and extend over the entire working width of the printing device (01), that the positioning in the first position and the positioning in the second position takes place on the basis of image data on which the printing on a printing material (08) is based and by a control device be transferred to the at least one print head (03). procedure after claim 7 , characterized in that a resolution in a transverse direction is maximum in the first position and wherein the resolution in the transverse direction in the second position is less than the maximum resolution in the transverse direction, wherein a resolution in the transport direction (T) in the second operating state of the resolution is different in the transport direction (T) in the first operating state. procedure after claim 7 and/or 8, characterized in that in a third operating state the at least one exit surface (11) is arranged in the second position and the maximum number of exciters is activated, and in that in the third operating state the speed of the printing material (08) in the transport direction (T) is identical to the speed of the printing material (08) in the transport direction (T) in the second operating state, the resolution in the transport direction (T) in the third operating state being higher than the resolution in the transport direction (T) of the second operating state, or that in the third operating state the speed of the printing material (08) in the transport direction (T) is higher than the speed of the printing material (08) in the transport direction (T) in the second operating state, with the resolution in the transport direction (T) increasing in the third operating state the resolution of the second operating state is identical. procedure after claim 7 and/or 8 and/or 9, characterized in that the displacement from the first position is realized by pivoting about a pivot axis (26) and wherein the pivot axis (26) is parallel to the z-direction (z). procedure after claim 7 and/or 8 and/or 9 and/or 10, characterized in that in each case a first outlet opening (12) and/or a second outlet opening (13) and/or a third outlet opening (14) has an exciter for ejecting a drop (27 ) is assigned and that in the first operating state the maximum number of exciters is activated and/or that in the second operating state a number of exciters less than the maximum number of exciters is activated and/or that in a third operating state the at least one exit surface ( 11) is arranged in the second position and the maximum number of exciters is controlled.

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