EP1317342A2 - Tintenstrahl-druckvorrichtung - Google Patents
Tintenstrahl-druckvorrichtungInfo
- Publication number
- EP1317342A2 EP1317342A2 EP01976229A EP01976229A EP1317342A2 EP 1317342 A2 EP1317342 A2 EP 1317342A2 EP 01976229 A EP01976229 A EP 01976229A EP 01976229 A EP01976229 A EP 01976229A EP 1317342 A2 EP1317342 A2 EP 1317342A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- medium
- distance
- ink jet
- feed
- printing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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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
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
- B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms
- B41J25/3086—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms with print gap adjustment means between the print head and its carriage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0065—Means for printing without leaving a margin on at least one edge of the copy material, e.g. edge-to-edge printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/007—Conveyor belts or like feeding devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0085—Using suction for maintaining printing material flat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/02—Platens
- B41J11/06—Flat page-size platens or smaller flat platens having a greater size than line-size platens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/20—Platen adjustments for varying the strength of impression, for a varying number of papers, for wear or for alignment, or for print gap adjustment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/0072—Handling wide cut sheets, e.g. using means for enabling or facilitating the conveyance of wide sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/005—Forming loops or sags in webs, e.g. for slackening a web or for compensating variations of the amount of conveyed web material (by arranging a "dancing roller" in a sag of the web material)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
- B41J15/046—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles for the guidance of continuous copy material, e.g. for preventing skewed conveyance of the continuous copy material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/16—Means for tensioning or winding the web
- B41J15/165—Means for tensioning or winding the web for tensioning continuous copy material by use of redirecting rollers or redirecting nonrevolving guides
-
- 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
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
- B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
- B41J3/4078—Printing on textile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
- B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
- B41J15/048—Conveyor belts or like feeding devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/20—Continuous handling processes
- B65H2301/21—Continuous handling processes of batches of material of different characteristics
- B65H2301/212—Continuous handling processes of batches of material of different characteristics of different thickness
Definitions
- the invention relates to an inkjet printing device for media, as it is in the preamble of claims 1 and 32, and a method for printing media, as described in the preamble of claims 70 and 73.
- inkjet printers A large number of inkjet printers are known - US 6,092,890 A, EP 0 842 051 B1, DE 4 019 543 A, DE 3 417 375 A - which have proven themselves for the most varied of applications.
- the inkjet printers are suitable for printing on a wide range of media, such as paper, plastic films, especially with different absorbency and porosity. Each of these media requires a different approach. It was therefore disadvantageous that such devices were each only suitable for one special medium.
- the invention has for its object to provide an inkjet printing device which can be used flexibly for a wide variety of media.
- inkjet printing device This object is achieved by the inkjet printing device according to claim 1. It is advantageous here that it is now also possible with an inkjet printing device to produce essentially inherently rigid, plate-shaped media such as e.g. Corrugated cardboard or corrugated cardboard blanks, cardboard plates that cannot be processed on a roll, plywood, compound, plastic and metal plates can be printed directly. This opens up the possibility for the first time to manufacture machines with which the most diverse materials such as paper, fabrics, cardboard and metal can be directly printed.
- essentially inherently rigid, plate-shaped media such as e.g. Corrugated cardboard or corrugated cardboard blanks, cardboard plates that cannot be processed on a roll, plywood, compound, plastic and metal plates can be printed directly.
- An embodiment variant according to claim 2 is advantageous since it can be used to process media of different thicknesses.
- An embodiment variant according to claim 5 is expedient since damage to the printing device or the production of faulty prints can thereby be avoided.
- Claim 11 achieved because it makes it easy to convert to different media, such as fabrics, paper webs, cardboard plates or plastic elements.
- a sensitive control of the feed movement and / or the alignment of the medium is achieved by the embodiment variant according to claim 12.
- a sensitive action on the medium to be printed is possible because, depending on the type and consistency of the medium, such as inherently rigid materials or flaccid materials, the rollers can be used several times.
- the embodiment variants according to claims 14 and 15 are suitable for exact guiding and smoothing of the medium to be processed.
- the development according to claim 16 is also advantageous, since it enables a uniform feed rate to be ensured over a larger area.
- a feed without counter pressure rollers is possible and therefore pressure sensitive or very flexible and sensitive materials can be processed.
- the ink jet printing device is characterized in that it can be used to print both roll and sheet media, both flexible and rigid, and both impermeable and porous media, since the distance between the medium and the print head arrangement or the print head and the respective nozzle for each color can be individually adapted to the predeterminable conditions.
- a fully automatic adjustment of the printing device to media-different thicknesses can be carried out easily, whereby it is possible to determine before the start of the printing process whether the thickness of the media introduced corresponds to the preset value in order to damage incorrect prints to prevent the printing device. Avoiding mistakes when Inserting the different media can be further improved by the configurations of claims 34 to 37.
- the embodiment variant according to claim 38 is advantageous, whereby sufficient monitoring of the desired distance is possible over the entire printing process and at
- Deviations can either interrupt the printing or corrective measures can be initiated.
- an embodiment variant according to claim 40 is advantageous since it enables rapid zeroing or system setup when printing different media.
- a further development according to claim 41 is also advantageous, since it enables a precise control range for each nozzle of a printhead or a printhead arrangement, and thus different adjustments according to the physical behavior of the color used, with regard to their consistency or viscosity, are taken into account can.
- the development according to claim 42 makes it possible to ensure uniform printing of a medium forming a flat surface.
- an embodiment according to claim 43 is also advantageous, since different media can thereby be printed with a uniform construction of the machine.
- An embodiment according to claim 56 is also advantageous, since as a result the basic spacing of the print head arrangement depends on the thickness of the medium and the position of the
- An embodiment according to claim 67 is also advantageous, since it is an exact one for flexible materials or those materials that cannot accommodate lateral guide pressure
- Positioning in the application area of the nozzle inkjet printing device can be ensured. It is also possible to process fabrics.
- Can affect printing device which can be created a machine with which a wide variety of plate media can be processed flexibly, stiff, impermeable or porous.
- the object of the present invention can also preferably be achieved individually by the method according to claim 70.
- a procedure according to claim 71 is particularly advantageous when processing media of widely differing thicknesses, since this reliably prevents the occurrence of incorrect groups or the damage to the machine by media of different thicknesses.
- the procedure according to approach 72 enables the processing of rigid media that are substantially larger than the support or guide surface in the area of the inkjet printing device.
- Thickness can be achieved in a simple manner.
- the inkjet printing device or its nozzles are arranged above the surface of the medium to be printed, at a distance that is perfect for high quality. Damage caused by confusion of the medium to be inserted into the inkjet printing device can be avoided by the measures of claim 75.
- Claim 79 and / or 80 can be achieved.
- a procedure according to claim 81 or 82 is recommended for exact feed marking, as a result of which the formation of stripes in the production of such prints on large areas can be reliably avoided.
- FIG. 2 shows a side view of the inkjet printing device according to the invention when printing on flexible material as a roll medium
- Fig. 3 is a side view of the ink jet printing device according to the invention
- Fig. 4 is a plan view of the ink jet printing device according to the invention.
- FIG. 6 shows a detail of the inkjet printing device with a sensor according to FIG. 1;
- FIG. 11 shows a section with an arrangement of a feed roller, countertracking rollers and lateral guide tracks, according to FIG. 3;
- FIG. 12 shows a section of an arrangement of a feed roller and a counter-pressure roller, according to FIG. 11;
- the inkjet printing device 10 firstly has a base body 12 fastened to a machine frame 11, on which various rollers, which are described in more detail below, are mounted. Furthermore, a printhead arrangement 14, which has a number of indicated printheads 16, is mounted in a frame construction on the grand body 12 so that it can be raised and lowered so that the height of the printheads 16 can be suitably adapted, for example, for printing on media of different thicknesses. In the embodiment shown, both on the feed side (the right side according to FIG.
- a foldable table 18 which is provided with a plurality of rollers 20 forming guide elements and also in its lower region according to the folded-up position has a foldable section 22, which can be folded upward about a folding axis 24, so that a window is formed in the table 18, through which the inkjet printing device 10 is also accessible from the supply and removal sides.
- 1 shows the two tables 18 in a folded-up position, since, as will be explained in more detail below, a situation is shown in which the printing of a roll medium takes place. However, if, as will be explained with reference to FIG.
- the two tables 18 are pivoted into a horizontal position so that the tables 18, which can also be referred to as supports, are used , plates can be fed in, which, even if they are comparatively heavy, can easily be handled.
- a medium roll 26 can be seen, which is mounted in a roll bearing in a manner to be explained below.
- the roll medium is first guided via a deflection roller 28 to a feed roller 30.
- the medium 101 passes under a dancer roller 32 which is pivotably mounted on an arm 34.
- a sensor 36 which interacts with it in a manner which will be explained below.
- a so-called brake roller 38 Downstream of the dancer roller 32 is a so-called brake roller 38, which is referred to as the brake roller 38 because, in particular when printing on flexible media, it does not rotate in the transport direction but in the opposite direction.
- the brake roller 38 rotates in a clockwise direction while the medium 101 moves from right to left through the ink jet printing device 10, and the feed roller 30 rotates counterclockwise.
- the side of the inkjet printing device 10 on which the medium roll 26 is arranged is also to be referred to as the media supply side or the supply side and that side of the inkjet printing device 10 which is opposite the medium roll 26 as the media removal side or Withdrawal side can be designated.
- the counter-pressure roller can act as a transport or feed roller with the associated roller. This is necessary in particular for particularly heavy, plate-shaped media which can no longer be easily transported by means of a belt drive described in more detail below in the description of FIG. 4.
- the counter-pressure roller can thus be brought into engagement with a roller described as a transport roller and provide the necessary transport.
- the countertracking roller can be disengaged, for example pivoted into a suitable position.
- a swivellably mounted counter-pressure roller 40 or 42 is arranged above the feed roller 30 as well as the brake roller 38, where the medium 101 is pressed on.
- the paper is stretched in the area of the dancer roller 32.
- a feed roller 30 can optimally take into account the different requirements that are imposed when printing a flexible medium 101 compared to a comparatively stiff medium.
- the ink jet drawer device 10 makes it possible, for example, to use a separately controllable roller when printing comparatively less flexible paper as the feed roller 30 in order to advance the paper by a defined feed length at given times.
- the same roller i.e. the feed roller 30, which is operated as a feed roller when paper is being covered, is not driven, but stands still and thus acts as a guide device.
- the flexible fabric is transferred from a transport roller 46 over the stationary roller, i.e. the feed roller 30, pulled and always kept taut or "ironed".
- the stationary roller i.e. the feed roller 30, further operated such that it is rotated by a small angle at intervals of, for example, a few minutes, so that the wear of the feed roller 30 by the material which is pulled over it takes place uniformly over the circumference of the roller.
- the provision of a plurality of rollers which can be controlled separately from one another thus creates a possibility of adapting the movement of the medium 101 to be printed by the inkjet printing device 10 to different circumstances in connection with different types of media, so that the inkjet printing device 10 according to the invention is versatile can be used.
- the inkjet printing device 10 according to the invention leads to the decisive advantage for the user that different media can be printed with one and the same device, and the necessary changeover processes can be accomplished quickly. In this respect, this enables the user of the inkjet printing device 10 according to the invention to work in an advantageous manner, which is the current one
- a tape feed 44 is arranged in the area of the print heads 16 and consists of a plurality of circumferential fenden tapes 72, and its exact operation is described below in the detailed description of FIG. 4.
- a transport roller 46 Downstream from the described area of the print heads 16 or the printing table 110 there is a transport roller 46, which in cooperation with a medium 101
- the counter-pressure roller 48 is provided above the transport roller 46, and a counter-pressure roller 50 is provided on the side of the transport roller 46.
- the transport roller 46 in cooperation with the transport roller 46, serves to transport plates in a horizontal direction, i.e. on the table 18 folded in this case in the horizontal position. If, as shown in FIG. 1, a roll medium is to be printed, which in turn is to be rolled up onto a roll 52 in the printed state, the lateral counter-pressure roller 50 is in engagement with the transport roller 46 and provides transportation.
- a cutting device 54 Downstream of the transport roller 46 is a cutting device 54, by means of which a roll medium can be cut in order to produce rolls 56 with a smaller circumference than that of the medium roll 26 on the feed side of the ink jet printing device 10.
- Fig. 1 it is indicated that such smaller rollers 56 can be stored in an upper region of the device.
- the printed medium 101 is to be wound onto a roll 52 which is comparatively large in the final state, then this is stored in a lower region in the ink jet printing device 10 according to the invention.
- a roller 52 which can usually no longer be handled and carried by a single operator, can be removed by a loading and unloading device 58, which is the subject of a recently filed application by the applicant, which is hereby published with regard to the and unloading device 58 is fully made the subject of the present application.
- a loading and unloading device 58 which is the subject of a recently filed application by the applicant, which is hereby published with regard to the and unloading device 58 is fully made the subject of the present application.
- the feed side (according to FIG. 1 on the right) it should be mentioned that the loading with a medium roll 26 can be accomplished by such a loading and unloading device 58.
- further roller bearings can also be provided on the feed side, so that a roll medium of comparatively small rolls 56 can be unwound in higher areas of the inkjet printing device 10.
- the operation of the inkjet printing device 10 according to the invention when printing on flexible media such as paper and synthetic fibers works as follows.
- the medium 101 is essentially drawn through the transport roller 46 over the printing table 110. It is expedient here if the tape feed 44 with the suction openings described in the detailed description of FIG. 4 below was used at least to keep the medium 101 flat. However, it can also support the feed or the medium 101.
- the printing is done in strips with a strip width of 70 mm, for example. Accordingly, the medium 101 must also be transported intermittently.
- the medium 101 is drawn through the transport roller 46 in cooperation with the counter-pressure roller 48, as described, over the brake roller 38 rotating in the opposite direction, so that the medium 101 always remains tensioned. As a result, it also maintains its rigidity and the distance between the medium 101 and the outlet surface of the drain head nozzles is kept constant, which is essential for ensuring a good printing result.
- the feed roller 30 advances the medium 101 until the dancer roller 32 reaches the deep position shown in FIG. 1, in which a sensor 36 arranged below the dancer roller 32 is actuated. This indicates that the required feed length has been reached and a control device 120 stops the feed roller 30.
- the material for positioning for the next printing process is then pulled further by the transport roller 46, so that the dancer roller 32 is raised. In the subsequent feed process by the feed roller 30, the material is in turn advanced so far that the dancer roller 32 lowers and hits the sensor 36.
- a dancer roller 32 to a roller which is operated as a feed roller 30 in connection with certain media.
- a dancer roller 32 is attached to an arm 34 which is pivotally attached to the grand body 12.
- a dancer roller 32 is combined with a sensor 36 such that a lowered position of the dancer roller 32 caused by the feed is detected by the sensor 36 and generates a signal which indicates a defined feed length.
- a transport roller 46 arranged downstream of the printing table 110 transports the medium 101 into the region of the print heads.
- th feed is provided in that, following the transport of the medium 101, which tensions the medium 101 and thus lifts the dancer roller 32, a feed takes place which causes the medium 101 to bulge downward, inter alia under the Effect of the gravity of the dancer roller 32. This occurs until the bulge is sufficiently large and the position of the dancer roller 32 becomes sufficiently deep so that the medium 101 strikes the described sensor 36, which subsequently detects and signals that the required feed length has been reached.
- a control device 120 stops the feed roller 30 for this purpose.
- a loop of the medium 101 is formed by the dancer roller 32, so that the medium 101 is advanced in the feed direction 137 until a distance perpendicular to the guide surface 130 of the medium 101 corresponds to the extent of the subsequent, intermittent feed movement of the medium 101 over the guide surface 130, whereupon the medium 101 is held on the side of the loop facing away from the guide surface 130 and relative to the guide surface 130 in the longitudinal direction of the medium 101 by a presettable extent of the distance of the loop is moved forward.
- FIG. 6 shows a detail of the inkjet printing device 10 with an alternative embodiment of the sensor 36, which is associated with the dancer roller 32.
- the medium 101 to be printed is passed under the dancer roller 32.
- the medium 101 moves from the feed roller 30 and the corresponding counter-pressure roller 40 under the dancer roller 32 and further over the brake roller 38 and the corresponding counter-pressure roller 42 in
- the medium 101 being tensioned by the dancer roller 32, which is movably mounted on the arm 34.
- the determination of the exact feed length of the medium 101 is signaled by the sensor 36, which in this case is designed as a light-optical sensor.
- the sensor 36 is preferably formed by a photoelectric arrangement, the radiation from one part of the
- Sensor 36 is partially shielded by the sinking dancer roll 32 or the medium 101, which can be detected on a second part of the sensor by a photoelectric receiver.
- the corresponding signals are used by a control device 120 to determine the required feed length of the medium 101.
- 2 shows the situation when printing on a flexible and porous medium 101, for example cotton fabric, which is used as a flag material. Since this is a porous medium 101 through which the ink used for printing at least partially passes, care must be taken to ensure that the printing table 110 underneath does not become dirty.
- an insertable ink absorption device which consists of an ink absorption pad 60 and two support edges 62 arranged laterally therefrom.
- the ink absorption device is inserted into a receiving device in the area of the receiving surface of the printing table 110.
- These support edges 62 are inserted into the printing table 110 and serve to guide the medium 101 in a defined manner at a defined height above the printing table 110.
- any ink that passes through the porous medium 101 is absorbed by the ink absorption pad 60 extending across the printing table 110.
- the ink jet printing device 10 e.g. it is also possible to provide a pressure table 110 that can be raised and lowered. In this way, different circumstances that occur when printing on different media can also be taken into account.
- the printing table 110 can be lowered in order to enable the use of an ink absorption device which is provided in the ink jet printing device 10 according to the invention.
- the ink absorption device that can be used also makes the inkjet drawer device 10 according to the invention usable in a flexible manner, since it can be used in a few steps when printing on porous media, such as fabrics, and thus ensures safe and clean operation of the inkjet printing device 10.
- impervious media such as e.g.
- Paper can be borderlessly printed with the inkjet printing device 10 according to the invention, since any ink which is emitted beyond the edge of the medium 101 is absorbed by the ink absorption device.
- the lifting and lowering printing table 110 enables the rapid insertion of such an ink absorption device and furthermore ensures that the position of the printing table 1 10 can also be adapted to the type of medium 101 to be printed, depending on the requirements.
- the printhead arrangement 14 which contains the printheads 16 must be raised a little, which is shown in FIG. 2 and can be seen from the fact that, for example, the the counter-pressure roller 40 assigned to the feed roller 30 is in a raised position compared to the situation of FIG. 1.
- the printheads are located also in the event that the medium 101 to be printed, as in the case of cotton fabric, is drawn over the supporting edges 62, at a defined height above the medium 101 to be printed, so that the printing result can be assured in terms of quality.
- the printing table 110 can be designed to be lowerable, which is provided according to the invention and also space for the insertion of the supporting edges 62 and
- Ink absorption pad 60 creates.
- the intermittent feed is in turn effected when the fabric is being stretched by the transport roller 46 through the engagement with the countertracking roller 48, which pulls the medium 101 over the brake roller 38.
- the separately controllable feed roller 30 is in this
- the case is not used before the feed of the medium 101, but stands still.
- the medium 101 is drawn over the stationary feed roller 30, which has a certain ironing effect. So that the abrasion of the feed roller 30, which is stationary in this case, does not take place at a single point, this feed roller 30 is rotated by a few degrees at regular intervals, so that the abrasion takes place uniformly over the circumference.
- the inkjet printing device 10 can be flexibly used for different media due to the separate controllability and the separate operating options of the individual rollers.
- the ink absorption pad 60 together with the support edges 62 can also be used with non-porous media if they are to be printed without borders, which necessarily leads to an at least slight over-edge spraying. Accordingly, the ink carried over the edge can be absorbed by the ink absorption pad 60 and the printing table 110 can be kept clean.
- Fig. 3 it is shown how the ink jet drawer device 10 according to the invention can be converted for printing on cardboard plates up to a certain basis weight. Up to a certain weight per unit area, the cardboard plates are fed by the belt feeder 44, the exact mode of operation of which is described below in the detailed description of FIG. 4.
- the belt feed 44 which is provided with a plurality of circulating belts or belts 72, which the respective plate by moving the belt or
- a foldable table 18 is provided on the medium supply and / or removal side, which has a foldable section 22 in its part closer to the print head arrangement 14.
- a table 18 also unfolds its advantages on any drawer device which does not necessarily have to have the features of the main claim, so that such an object is to be regarded as the subject of the present application.
- the formation of a foldable table 18 on the medium feed and / or removal side means that the drawer device can be converted extremely flexibly from roll to plate or sheet media.
- printing can be carried out on roll media which are unwound from one roll, for example the medium roll 26, and in the printed state are wound onto a further roll, for example the roll 52.
- the table 18 When folded up, the table 18 does not interfere with the operation.
- the table 18 has a foldable section 22 in its area closer to the print head arrangement 14.
- a lower section 22 can be folded away from the table 18 in its folded-away, in particular folded-up state, so that the area of the ink jet drawer 10 in which the printing takes place is readily accessible.
- the foldable section 22 of the foldable table 18 is preferably designed such that it can be folded away upwards, so that access to the interior of the inkjet printing device 10 is not significantly impeded.
- rollers 20 offer the advantage that they can be easily fed to the inkjet printing device 10, so that it can also be used for printing such media.
- the foldable section 22 of the table 18 it is preferred for the foldable section 22 of the table 18 that it is foldably attached to the base body 12 at a point remote from the print head arrangement 14. This ensures that the foldable section 22 can be folded away from the drawer device, so to speak, so that access to it is impaired as little as possible. In particular, the foldable section 22 on the folded-up table 18 can be folded up.
- the respective counter-pressure rollers 40, 42 and 48 are of the assigned feed 30 , Brake 38 or transport rollers 46 out of engagement, since in this case the material can only be transported by the belt feed 44.
- the belt feed 44 can reach the limits of its performance, in other words it is too weak for the further feed.
- the counter pressure rollers 40, 42 and 48 come into engagement with the heavy plate material and act with the associated rollers, e.g. the feed roller 30, the brake roller 38 or the transport roller 46, together to move the material.
- the guide plane 138 for the medium 101 specified by the tables 18 is arranged upstream of the printing table 110, essentially in alignment with the plane of the guide surface 130.
- the guide level 131 can also be slightly offset in height from the plane of the guide surface 130. It is also advantageous, however, that the guide plane 131 in the direction opposite to the feed direction 137 has a course approximately corresponding to the bending line of the medium 101, since in this way the guide surface 130 in the area of the inkjet printing device 10 is short in relation to the length of the medium 101 , kinking from the rigid medium 101 is prevented.
- the two tables 18 can be seen in their unfolded state.
- the tables 18 each have a plurality of rollers 20, which in the case shown are divided into three parts along their axial extent, so that the individual sections of the rollers 20 are supported on at least one side in one of the longitudinal struts 64.
- a foldable section 22 can be seen which is located in one of the printhead arrangements.
- tion 14 (Fig. 3) distant area is hinged about a folding axis 24.
- the folding movement of the foldable section 22 is damped by a gas pressure spring 70. It should also be mentioned that the foldable section 22 and / or the table 18 can be locked in one or both folding positions.
- the tape feed 44 which consists of a plurality of tapes 72 or belts, in the case shown there are eight.
- the tapes 72 run in suitable grooves, to which, for example through the elongated holes 74 shown, a vacuum is applied from the underside.
- the medium 101 is sucked in through the numerous openings 75 in the belts 72 and transported by moving the belts 72.
- suction openings 76 are also provided in the printing table 110 as such, which according to the invention can be operated independently of the openings 75 of the belts 72.
- the medium feed is sucked in by the band feed 44, which according to a preferred embodiment consists of a plurality of revolving belts 72, each of which is provided with openings 75, and is kept flat during printing.
- the openings 75 of the belts 72 and the suction openings 76 of the printing table 110 can be operated with different negative pressure, so that a different suction force is applied to the medium 101 in different areas, and flexible media are not in a way and Bend in ways that could affect the quality of the printed result.
- the fixed suction openings 76 of the printing table 110 can be switched off during the transport by the belt feed 44, so that in this area no unnecessary frictional force is applied to the medium 101 to be transported, which would hinder the transport by the belt feed 44.
- the openings 75 in the belts 72 and the suction openings 76 in the printing table 110 are connected to a vacuum system 77.
- a feed device which has at least one band 72 which is provided with openings 75 and to which a negative pressure can be applied.
- a tape feed 44 is formed, which is advantageous for certain media.
- the specific configuration of such a tape feed 44 can be provided, for example, in such a way that in the printing table 110 a comparatively flat and wide groove is formed, in which an endless belt is guided.
- the band 72 has openings 75 and a connection to a vacuum system 77 is provided in the bottom of the groove.
- the band 72 can be brought into contact sealingly on its sides and at its edge, air is sucked in by the vacuum system 77 through the openings 75 of the band 72, so that an impermeable medium 101 to be transported is sucked in by the band 72 and during movement of the belt 72 can be transported.
- a combination with a printing table 110 has proven to be particularly advantageous, which also has suction openings 76, which, however, can be supplied with negative pressure independently of the negative pressure applied to the belt feed 44 and can be regulated in this regard.
- suction can take place independently of one another through the movable openings 75 of the band 72 and the fixed suction openings 76 of the printing table 110. This enables, for example, a particularly reliable plan-keeping of the medium 101 to be printed when printing, by all
- Openings 75 and suction openings 76 are operated.
- the fixed suction openings 76 of the printing table 110 can be switched off.
- the suction takes place only through the openings 75 of the band, i.e. of the belt 72, and this transport is not hindered by an increased friction due to the suction through the fixed suction openings 76.
- tests have resulted in applications in which certain media, in order to keep them flat, are weaker to suck in from the fixed suction openings 76 than from the movable openings 75 of the band 72, since they would otherwise bend in an unfavorable manner.
- a roller bearing is preferably used which leads to minor adjustments with regard to the edge of a roller medium, and which accordingly can also be used independently of the other features according to the invention and is to be regarded as the subject of the present application is.
- This roller bearing is characterized in that it is adjustable in the axial direction 105 and that a band edge sensor 104 is assigned to it.
- flexible media which are not necessarily wound up exactly straight, or which have had a deterioration in the quality of the winding during transport, are trimmed in such a way that the resulting trimmed edge is present at a defined location. This leads to a not inconsiderable expenditure of time and an avoidable loss of material.
- the edge of the roll medium i.e. of the medium 101 is continuously scanned, and the axially adjustable roller bearing is adjusted accordingly.
- the roll bearing is adjusted axially such that the edge of the belt, i.e. the edge of the medium 101 is again in the desired position.
- the band edge sensor 104 Since conventional roll media can have a diameter of up to approximately 30 cm, it is preferred for this purpose that the band edge sensor 104 has a corresponding depth of field, so that it is unwound both in a situation in which the medium 101 is carried out from an almost completely filled medium roll 26 and in a situation in which the medium 101 is unwound from an almost empty medium roll 26, the position of the edge of the medium 101 can be reliably detected.
- the medium roll 26 has a bearing mandrel 78 on both sides, which is provided on one side, according to FIG. 5 the right side, with a comparatively narrow wheel, for example with a V-shaped circumferential profile , This narrow wheel engages in at least one wheel 80 of the roller bearing provided with a suitable groove.
- a strip edge sensor 104 is also provided as part of a strip edge measuring device which always scans the position of the edge of the medium 101 and generates a suitable signal when the edge of the medium 101 has moved away from its desired position.
- the roller bearing which can be adjusted in the direction 105, is adjusted in a suitable manner so that the strip edge is brought back into its desired position.
- a medium 101 can be printed without having to trim the edges in accordance with the prior art in order to bring them into the required position.
- the wheel is on the other side the medium roll 26 is slidably mounted in the roller bearing in the axial direction 105.
- FIG. 13 shows a detail of the roller bearing for the medium roller 26, according to FIG. 5, in a perspective view.
- a control circuit which consists of the strip edge sensor 104 of a strip edge control 106 and an actuator 107. If the strip edge sensor 104 detects a deviation from the target edge of the medium 101, a signal is generated on the basis of this deviation in the strip edge control 106 that causes the actuator 107 to return the position of the media roll 26 to the preselectable target position.
- the actuator 107 is designed so that it can move the roller bearing for the media roll 26 in the axial direction 105.
- the determination of the position of the band edge, i.e. of the edge of the medium 101 can be carried out with the aid of various measuring principles. It is particularly advantageous to design the strip edge sensor 104 with a measuring system formed from light barriers.
- a novel measuring and transport system is also used, which is also independent of all of the features of the inkjet printing device 10 according to the invention described above and leads to advantages in any printing device.
- the transport and measuring system is characterized in that a transport roller is provided both upstream and downstream of the printing table 110, each of which is assigned a measuring device. 1, the brake roller 38 is assigned a measuring device 102 and the transport roller 46 is assigned a measuring device 103.
- the front edge of a medium 101 to be printed has to be advanced in a printing device until a transport roller 46 located downstream of the printing table 110 with an associated measuring device 103 detects the front edge and can thus bring the material into a defined position.
- the positioning of the material or of the front edge is initially carried out by the brake roller 38 lying upstream, ie "in front" of the printing table 110 or the printing heads 16, and the measuring system assigned to this transport roller 46.
- the upstream brake roller 38 brings the front edge of the medium 101 into one with the aid of the associated measuring system or the measuring device 102 Printing suitable position so that printing can begin at the front edge of the medium 101 almost without borders or with extremely little waste.
- the medium 101 is pushed by the transport roller located upstream of the printing table 110, ie the one ahead, until the front edge reaches the region of the transport roller 46 located downstream of the printing table 110.
- the downstream transport roller 46 and the measuring system or measuring device 103 assigned to it take over the transport and regulation of the exact position of the medium 101.
- these components can take over the transport and position control until the rear edge of the medium 101 reaches the area of the printing table 110 and can therefore also be printed almost without borders.
- the signals of the two measuring devices 102, 103 are combined and compared with one another by a suitable control device 120 and, in particular, the "transfer" is carried out from the upstream system to the downstream system.
- the feed distance can be measured in a variety of ways. For example, it is conceivable to make markings on the medium to be printed 101 at a fixed distance from one another and to detect them using a suitable sensor. Furthermore, a certain pattern with recurring elements can be applied to the medium 101, so that the feed distance can be detected on the basis of these recurring elements. Furthermore, this can be done using stochastic patterns, e.g. B. are formed by the paper surface itself, the detection being carried out together with a correlation measurement. In addition, the use of a measuring wheel or a measuring system with a drag clamp is possible. In an advantageous manner, the measuring devices 102 and 103 for measuring the feed distance of the medium 101 can be carried out by applying color markings on the medium 101, which are only visible under special electromagnetic radiation. It would be e.g. possible to make only visible markings on the medium 101 under UV light, which can be detected by corresponding photoelectrically detecting measuring devices 102 or 103.
- the inkjet printing device 10 for adapting the distances between the print heads 16 and the print head arrangement 14 from the medium 101 to be printed.
- the inkjet printing device is designed such that the print head 16 or on a distance sensor 11 is attached to the printhead arrangement 14.
- This distance sensor 11 1 is used to measure a distance 112 between the top 113 of the medium 101 to be printed and an ink or nozzle 114 of the print head arrangement 14. Since both the printing table 110 and the drain head arrangement 14 can be raised and lowered, it is thus possible to use the ink jet according to the invention.
- Printing device 10 can be adapted very flexibly and almost without additional conversion work to different media 101 to be printed.
- the measured variable of the distance sensor 111 is used to control the distance 112 between the top 113 of the medium 101 and the nozzle or nozzles 114 of the printhead arrangement 14 at any time to a setpoint 121 required for proper operation by means of a corresponding control device 120 ,
- the print heads 16 and the drain head arrangement 14 are fastened in a holder 122, this holder 122 being adjusted vertically or perpendicularly to the upper side 113 of the medium 101 in a height guide path 123 of a slide 124 can.
- a lifting drive 125 which is controlled by the control device 120, is actuated for this height adjustment of the holder 122.
- the holder 122 for the print heads 16 is thus adjustable via the stroke drive 125 along the height guide path 123.
- the carriage 124 is in turn arranged to be movable on a transverse guide track 126 by means of an adjustment drive, so that the drain head arrangement 14 can be moved laterally and parallel to the top 113 of the medium 101 via the top 113.
- the carrier 127 is in turn arranged on a carrier guide 128 in the vertical direction on the machine frame 11 of the inkjet printing device 10, the vertical
- the support 127 is adjusted by a vertical adjustment device 129 which can be actuated by the control device 120.
- the carrier 127 of the drain head arrangement 14 can thus be adjusted at least approximately perpendicularly to a guide surface 130 for the medium 101 via a vertical adjusting device 129.
- the pressure table 110 which is vertically adjustable by means of a height guide 135, this being adjustable at least approximately perpendicularly to the guide surface 130 of the medium 101 or relative to the drain head arrangement 14 by means of actuators 136.
- FIG. 8 shows a detail of the inkjet printing device 10 in a sectional representation, according to FIG. 7.
- the medium 101 to be printed lies on the guide surface 130 of the printing table 110.
- the representation in FIG. 8 thus corresponds to a viewing direction transverse to Feed direction 137 of the medium 101 or in the direction of movement of the carrier 127 or the drain head arrangement 14 along the transverse guide path 126.
- the distance 112 between the nozzles 114 and the top side 113 of the medium 101 can be changed in a number of ways.
- the height adjustment of the printhead arrangements 114 is possible both by a vertical displacement of the holder 122 relative to the carriage 124 and by a vertical displacement of the carrier 127 on the carrier guide 128 fastened to the machine frame 11.
- the height of the drawer table 110 relative to the grand body 12 is adjusted by the actuator 136.
- the outlet openings 138 of the nozzles 114 are in a plane 139 of the upper side 113 of the medium 101 or
- the guide surface 130 of the printing table 110 is arranged opposite one another, the plane 139 and the upper side 113 of the medium 101 being aligned as parallel as possible to one another.
- FIG. 9 shows a detail of the ink jet drawer device 10 with the carriages 124 cut away.
- the print heads 16, in each of which a plurality of nozzles 114 are arranged, are each relatively adjustable to the holder 122 by a print head stroke drive 140. It can thus be achieved that, starting from a measurement of the respective individual distance 112 of each print head 16, the desired value 121 of the distance of the print head 16 from the top side 13 of the medium 101 can be set. This is particularly advantageous if, as already described above, the feed devices, ie the rollers described and / or the belt feed 44, are not sufficient to evenly align the medium 101 on the guide surface 130 of the printing table 110. This can be the case in particular with inherently rigid media 101, such as cardboard plates, plastic plates or the like.
- Such a plate-shaped medium 101 to be printed can have, for example, a slight bend which cannot be sufficiently reset due to the suction effect of the tape feed 101.
- the individual distance 112 between the outlet openings 138 and the upper side 113 of the medium 101 can be adjusted as far as possible to the desired value 121.
- 10 shows a detail of the holder 122 with a print head 16 in which a plurality of nozzles 114 are arranged.
- the individual nozzles 114 are each formed with a nozzle actuator 141, so that the distance 112 of the outlet opening 138 of each nozzle 114 can also be adjusted by the control device 120. It is thus possible to set the distances 112 of the outlet openings 138 of the nozzles 114 even more precisely if the top surface 113 of the medium 101 deviates from the flat shape.
- the nozzle actuator 141 is preferably formed by a micro drive, for example a piezo drive.
- the nozzle actuator 141 formed by a micro-drive is designed so that the nozzle 114 is adjustable against the action of an elastically resettable restoring element, for example a spring or an elastically resettable plastic, for example a polyurethane ring.
- an elastically resettable restoring element for example a spring or an elastically resettable plastic, for example a polyurethane ring.
- a nozzle actuator 141 is assigned to several nozzles 114 of a print head 16, or that a larger number of nozzles 114 are combined in a nozzle head 16 to form nozzle groups and each of these nozzle groups is assigned a nozzle actuator 141.
- the above-described devices for changing the distance 112 between the outlet openings 138 of the nozzles 114 and the upper side 113 of the medium 101 to be printed together form an adjusting device, wherein individual devices can be operated both manually and all together by the control device 120.
- the adjusting device consists only of a part of the devices, such as the actuator 136 for the printing table 110, the vertical adjusting device 129 for the carrier 127, the lifting drive 125 for the holding ring 122, and the print head lifting drive 140 for the print heads 16 and the nozzle actuator 141 for the nozzles 114 is formed.
- Various distance measuring methods known per se can be used to determine the distance 112 between the upper side 113 of the medium 101 and the nozzle 114 or the nozzles of the print head arrangement 14 by means of the distance sensor 111.
- further developments of the inkjet printing device 10 are advantageous, the distance 1 12 being measured by means of acoustic, electrical or optical distance measuring methods, since there is no mechanical contact between the distance sensor 1 11 and the upper side 113 of the medium 101 to be printed and thereby a Blurring of the still wet paint or ink can be excluded.
- the distance sensor 111 can be designed to use electromagnetic waves, for example, as a reflection light sensor or as a range finder with an electro-optical receiving element.
- an already applied color point is used to measure the distance 112, in which a light beam is directed onto this color point and the distance 112, between a nozzle 114 of the inkjet printing device 10 and the light beam reflected by this color point this facing top 113 of the medium 101 is determined.
- the distance sensor 11 is formed at least in two parts and consists of a transmitting device 142 and a receiving device 143.
- the transmitting device 142 and the receiving device 143 are both attached to the printhead arrangement 14.
- the transmitting device 142 and the receiving device 143 are expediently on the printheads 16 or attached to the nozzles 114.
- measuring methods for the distance sensor 111 are also conceivable, in which one of the parts, i.e. the transmitting device 142 or the receiving device 143, on the printhead arrangement 14 and / or on the printhead
- the receiving device 143 or the transmitting device 142 is arranged on the printing table 110.
- the distance sensor 111 can also be attached laterally to the drain head assembly 14, or it is possible that on both sides of the print head assembly 14, that is to say on both sides, in the direction corresponding to or opposite to the movement of the drain head assembly 14, along the transverse guide track 126 , are directed, a distance sensor 11 1 is attached.
- each of the print heads 16 is preceded by a distance sensor 1 1 1, in the feed direction thereof, corresponding to the direction of the transverse guide track 126, which has the advantage that the local distance 112 can be recorded, so to speak, ahead of time.
- the distance sensor 11 shown in dashed lines in FIG. 8) to be attached to the drain head arrangement 14 upstream of the feed direction 137 of the medium 101.
- this arrangement of the level sensor 111 also has the advantage that when feeding the medium 101, in accordance with the feed direction 137, the distance sensor 111 can also be used at the same time for detecting a front edge of the medium 101 running transverse to the feed direction 137. This in fact makes it possible to prevent the nozzles from being fed when a medium 101 whose material thickness 115 is greater than the distance between the outlet opening 138
- the control device (120) is designed to emit an error message, which occurs as soon as the sensor detects the top (113) of the medium (101) and the distance (112) does not correspond to the target value (121), in particular is greater than the target value ( 121).
- the distance sensor 111 is fastened to the drain head arrangement 14, but it is of course also possible for each of the print heads 16 to have a separate distance sensor 111 as shown in FIG. 9 or to be arranged on each nozzle 114 as shown in FIG. 10 , This has the advantage that, in cooperation with the control device 120, an individual adaptation of the distance 112 is possible for the nozzle heads 16 and also for the nozzles 114. Alternatively, however, it is also possible for a distance sensor 111 to be arranged on the drawer table 110.
- the distance sensor 111 forms a distance measuring device together with a transmission link and an evaluation unit or a measured value converter.
- the evaluation unit or the measured value converter is preferably arranged in the control device 120. The distance sensor 111 and the distance measuring device are thus connected to the control device
- the actual value of the distance 112 is determined by the distance measuring device and in the control device 120 with a predeterminable or adjustable target value
- the difference between the actual value of the distance 112 and the desired value 121 determined by the control device 120 then forms the basis for reducing this difference by controlling the various elements of the adjusting device of the inkjet printing device 10.
- the inkjet printing device 10 is designed such that the actual value of the distance 112 is continuously determined by the distance measuring device while the paint is being applied with the drain head arrangement 14 on the medium 101.
- the control device 120 for reducing the difference between the target value 121 and the actual value of the distance 112 during the application of the color to the medium 101 is preferably also permanent or even before the application begins the color of the color is activated with the drain head arrangement 14 on the medium 101.
- setting members are formed on the control device 120.
- the control device 120 preferably comprises an electronic computer, in particular a computer, it being possible for the setpoint 121 to be specified via a corresponding input keyboard on the computer.
- this specification of the setpoint 121 it is also possible for this specification of the setpoint 121 to be program-controlled in the computer of the control device 120, with other parameters that are essential for the printing process, such as e.g. the quality of the colors or inks used or the surface quality of the medium 101 are detected automatically by the program or via the input keyboard of the
- an ink jet drawer device 10 it is advantageously possible to position the drack head arrangement 14 in its relative position perpendicular to the plane of the support and / or guide surface 130 at least a distance 112 of 0.1 to 15 mm, preferably 0.5 to 10 mm. to position in a drawer position for printing on the medium 101.
- FIGS. 11 and 12 show details of the arrangement of the counter-pressure roller 40 and the feed roller 30.
- FIG. 11 shows a detail of the feed roller 30 and the counter-pressure roller 40, according to FIG. 3.
- the medium 101 lies on the feed roller 30, a situation being shown in which the medium 101 is slightly deformed, as can be the case, for example, with an inherently rigid medium 101 such as a cardboard or plastic plate.
- a plurality of counter-pressure rollers 40 are formed which are movably supported in a roller frame 144, in relation to this roller frame 144, in the vertical direction.
- the roller frame 144 can be raised and lowered with the counter-pressure rollers 40 in the vertical direction, ie in the direction perpendicular to the guide surface 130.
- the countertracking rollers 40 can be brought up to the top side 13 of the medium 101 by lowering the roller frame 144 so that they rest on the top side 13 and adapt to the slightly curved shape of this top side 113 of the medium 101.
- FIG. 12 shows a detail of the arrangement of the counter-pressure rollers 40 and the feed roller 30, according to FIG. 11 in a sectional illustration.
- Each counter-pressure roller 40 is rotatably mounted on an arm 145 and is supported against the roller frame 144 by a resilient restoring element 146, such as a spring. If the roller frame 144 with the counter-pressure rollers 40 is now applied to the upper side 113 of the medium 101 with a predefined force, the restoring elements 146 are compressed accordingly.
- An average material thickness 115 of the medium 101 can be inferred from an average height of the roller frame 144 in relation to the guide surface 130. With only slightly deformed media 101, the determination of an average material thickness 115 is sufficiently precise to be able to use the control device 120 to set the distance 112 (FIG. 7) to the desired value 121 (FIG. 7) on the basis of this value.
- the arrangement described in FIGS. 11 and 12 thus has the function of a distance measuring device, as is also realized by the distance sensor 111 and can be used in combination with the distance measuring device formed with a distance sensor 111 or alternatively.
- a distance measuring device as is also realized by the distance sensor 111 and can be used in combination with the distance measuring device formed with a distance sensor 111 or alternatively.
- a side guideway 150 is assigned to the longitudinal side edge 151 of the medium 101. Be this ten guidance track 150 can be arranged from several, in the longitudinal direction of the medium 101 with the required spacing from each other rollers 152, which can be fixed on a housing part 153 adjustable transversely to the feed direction 137.
- rollers 152 are preferably made of a pressure-resistant material, so that the side guide web 150 represents an exact direction and side boundary for the medium 101. With certain intrinsically rigid media 101, it can prove advantageous to continuously align them precisely with the side guide track 150. For this purpose, it can prove to be advantageous to assign the opposite longitudinal side edge 154 of the medium 101 opposite the longitudinal side edge 151 to a further side guide track 155.
- This can in turn consist of a plurality of rollers 152 arranged one behind the other in alignment, each individual roller 152 or groups of rollers 152 or the entire side guideway 155 transversely to the feed direction 137 against the action of means 165, for example springs, elastically prestressed in the direction of the opposite side guideway 150 , be adjustable.
- the rollers 157 of the side guideway 155 can also be dimensionally stable or hard, for example by outer rings of ball bearings.
- the elastically prestressed means 156 in that the rollers 157 are adjusted in a roughly adjustable manner to a housing part and the rollers 157 are intrinsically elastic, for example made of an elastically yieldable plastic or rubber material, for example polyurethane. It is thus possible that with slight fluctuations in the width of the medium 101 to be printed, on the one hand the reference edge of the medium 101 always rests on the longitudinal side edge 151 without play on the lateral guide edge 150 and width tolerances can be compensated for by the deformation of the rollers 157 or the deformation of the spring.
- the one pretensioning force can be set in the direction of the side guide track 150, so that even when the dimension is undershot
- Width a secure contact of the reference edge of the medium 101 on the lateral guide path 150 is ensured.
- the medium 101 is moved into the area of an inkjet printing device and on the basis of the digital data of a digitally stored image how the position, intensity and / or a color of a plurality of color dots, a reproduction of this image is produced, an essentially inherently rigid, plate-shaped medium 101, optionally after a determination of its material thickness 115, relative to a flat support surface or guide surface 130 in the area of an ink jet drawer and then a plurality of nozzles 114 arranged in a plane 139 running parallel to the top 13 of the medium 101 are moved transversely to the feed direction 137 of the medium 101 relative to the same across the entire width of the drawer and thereby the same a plurality of rows of color dots in the feed direction 137 of the medium 101 are applied one after the other, whereupon the nozzles 114 are moved at least once more transversely to the feed direction 137 of
- the substantially inherently rigid, plate-shaped medium 101 is also at least over part of its length in the feed direction 137 before and possibly after the support or.
- Guide surface 130 is supported and guided in approximately the same plane by guide elements arranged fixed relative to the medium 101.
- an ink jet drawer device 10 in particular a method for printing different media for digitally stored images can be realized.
- a digital data of a digitally stored image such as the position, intensity and / or a color of an abundance of color dots
- a reproduction of an image is produced, an actual value of the distance 112 between the print head arrangement or the print heads or the nozzles 114 the ink jet printing device and a surface of the medium 101 and / or the guide surface 130 and / or the band edge of the medium 101 facing the nozzles 114, and a preset target value 121 for the distance 112 and / or the position of the medium roll 26 transversely to the feed direction 137 of the medium 101 is specified relative to the base body.
- the inkjet printing device at least before the start of the ink delivery to an actual value of the distance which corresponds to the preset target value 121 of the distance 112
- a counter-pressure roller and / or the upstream counter-pressure roller and / or the distance-measuring device can be arranged at least before the medium 101 is fed into the area of the printhead attachments.
- the roller bearing for the medium roller 26 is adjusted with the actuator 107 in the axial direction 105 transversely to the feed device in such a way that the band edge of the medium 101 in the area of the print head arrangement is within the desired value located and that the actual value of the ribbon edge in the area of the printhead arrangement or this is determined immediately upstream.
- the quality of the images produced with an inkjet printing device according to the invention can be improved in particular in that the distance 112 between at least one nozzle 114 of the inkjet printing device and the medium 101 and / or the position of the medium roller 26 continuously during the application of the color with the Printhead arrangement is determined and that the difference between the target and the actual value of the distance 112 and / or the position of the medium roll 26 is determined during the application of the ink.
- Ink jet printing device 101 medium machine frame 102 measuring device base body 103 measuring device printhead arrangement 104 ribbon edge sensor printhead 105 direction table 106 ribbon edge control roller 107 actuator section folding axis medium roller 110 printing table deflection roller 111 distance sensor feed roller 112 distance dancer roller 113 top arm 114 nozzle sensor 115 material thickness brake roller counter pressure roller 120 control device Counter-pressure roller 121 Setpoint belt feed 122 Holding rank Transport roller 123 Height guide track Counter-pressure roller 124 Slide counter-pressure roller 125 Lift drive roller 126 Cross-guide track cutting device 127 Carrier roller 128 Carrier guide unloading device 129 Adjustment device ink absorption pad 130 Guide surface support edge 131 Guide level longitudinal struts
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Ink Jet (AREA)
- Handling Of Sheets (AREA)
- Handling Of Cut Paper (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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ITBZ000037 | 2000-09-15 | ||
IT2000BZ000037A IT1316139B1 (it) | 2000-09-15 | 2000-09-15 | Dispositivo di stampa a getto di inchiostro. |
PCT/EP2001/010732 WO2002022362A2 (de) | 2000-09-15 | 2001-09-17 | Tintenstrahl-druckvorrichtung |
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EP1317342A2 true EP1317342A2 (de) | 2003-06-11 |
EP1317342B1 EP1317342B1 (de) | 2014-04-23 |
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Application Number | Title | Priority Date | Filing Date |
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EP01976229.3A Expired - Lifetime EP1317342B1 (de) | 2000-09-15 | 2001-09-17 | Tintenstrahl-druckvorrichtung |
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US (1) | US20040017456A1 (de) |
EP (1) | EP1317342B1 (de) |
JP (1) | JP5006501B2 (de) |
AU (2) | AU2001240492A1 (de) |
ES (1) | ES2479190T3 (de) |
IT (1) | IT1316139B1 (de) |
WO (2) | WO2002022368A1 (de) |
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Publication number | Priority date | Publication date | Assignee | Title |
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US6869163B2 (en) * | 2002-05-21 | 2005-03-22 | Brother Kogyo Kabushiki Kaisha | Ink-jet recording apparatus |
DE10312601A1 (de) * | 2003-03-21 | 2004-09-30 | Bhs Corrugated Maschinen- Und Anlagenbau Gmbh | Material-Bahn sowie Verfahren zur Herstellung von Wellpappe |
WO2004086150A1 (en) * | 2003-03-26 | 2004-10-07 | Multi Sign A/S | Printing on metal by selective electrostatic powder coating |
JP2005067106A (ja) * | 2003-08-27 | 2005-03-17 | Mutoh Ind Ltd | プリンタ |
DE102004002232B4 (de) * | 2004-01-15 | 2007-09-13 | OCé PRINTING SYSTEMS GMBH | Multifunktionseinrichtung zur Nachbearbeitung einer von einer elektrografischen Druckeinrichtung bedruckten Bedruckstoffbahn |
US7699460B2 (en) * | 2004-08-12 | 2010-04-20 | Canon Kabushiki Kaisha | Printing apparatus and printing method |
KR100873904B1 (ko) * | 2004-12-30 | 2008-12-15 | 삼성전자주식회사 | 젯팅 헤드의 분사 성능 검사기 |
JP4396559B2 (ja) * | 2005-03-24 | 2010-01-13 | 富士ゼロックス株式会社 | 液滴吐出装置 |
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- 2000-09-15 IT IT2000BZ000037A patent/IT1316139B1/it active
- 2000-12-29 WO PCT/EP2000/013334 patent/WO2002022368A1/de active Application Filing
- 2000-12-29 AU AU2001240492A patent/AU2001240492A1/en not_active Abandoned
-
2001
- 2001-09-17 JP JP2002526591A patent/JP5006501B2/ja not_active Expired - Fee Related
- 2001-09-17 AU AU2001295568A patent/AU2001295568A1/en not_active Abandoned
- 2001-09-17 WO PCT/EP2001/010732 patent/WO2002022362A2/de active Application Filing
- 2001-09-17 EP EP01976229.3A patent/EP1317342B1/de not_active Expired - Lifetime
- 2001-09-17 US US10/380,656 patent/US20040017456A1/en not_active Abandoned
- 2001-09-17 ES ES01976229.3T patent/ES2479190T3/es not_active Expired - Lifetime
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See references of WO0222362A2 * |
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ITBZ20000037A0 (it) | 2000-09-15 |
JP5006501B2 (ja) | 2012-08-22 |
US20040017456A1 (en) | 2004-01-29 |
ITBZ20000037A1 (it) | 2002-03-15 |
AU2001240492A1 (en) | 2002-03-26 |
WO2002022362A3 (de) | 2003-01-16 |
AU2001295568A1 (en) | 2002-03-26 |
WO2002022362A2 (de) | 2002-03-21 |
ES2479190T3 (es) | 2014-07-23 |
JP2004508972A (ja) | 2004-03-25 |
EP1317342B1 (de) | 2014-04-23 |
WO2002022368A1 (de) | 2002-03-21 |
IT1316139B1 (it) | 2003-03-28 |
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