CN109774311B - Printing machine with printing beam for jetting ink - Google Patents
Printing machine with printing beam for jetting ink Download PDFInfo
- Publication number
- CN109774311B CN109774311B CN201811351228.XA CN201811351228A CN109774311B CN 109774311 B CN109774311 B CN 109774311B CN 201811351228 A CN201811351228 A CN 201811351228A CN 109774311 B CN109774311 B CN 109774311B
- Authority
- CN
- China
- Prior art keywords
- strip
- printing
- cleaning
- contact
- printing press
- 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.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F35/00—Cleaning arrangements or 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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16535—Cleaning of print head nozzles using wiping constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16585—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles for paper-width or non-reciprocating print heads
- B41J2/16588—Print heads movable towards the cleaning unit
-
- 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
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/17—Cleaning arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16535—Cleaning of print head nozzles using wiping constructions
- B41J2002/1655—Cleaning of print head nozzles using wiping constructions with wiping surface parallel with nozzle plate and mounted on reels, e.g. cleaning ribbon cassettes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/165—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16552—Cleaning of print head nozzles using cleaning fluids
- B41J2002/16558—Using cleaning liquid for wet wiping
-
- 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
- B41J2025/008—Actions or mechanisms not otherwise provided for comprising a plurality of print heads placed around a drum
Abstract
The invention relates to a printing press comprising: a printing beam (1) for ink jetting; a cleaning device (5) having a strip (8) for cleaning the printing beam (1); and an inspection device (23) for inspecting the moisture of the strip (8). The inspection device (23) can operate on the principle of resistance-humidity measurement. For this purpose, the inspection device (23) can have a first electrode contact (21) and a second electrode contact (22), which are arranged on the printing bar (1).
Description
Technical Field
The invention relates to a printing press comprising: a print beam for jetting ink; and a cleaning device having a tape (Band) for cleaning the printing beam.
Background
In document DE 10028318B 4, a printing press is described in which the nozzle outlet face is wiped with a cleaning strip. The cleaning strips are made of a woven or felt-like material and are air permeable. During cleaning, the printing ink is sucked from the printing head onto the cleaning strip by means of a suction mechanism through the cleaning strip. The unwind roller is used to store a clean section of the cleaning strip that has not been impregnated with printing ink, while the wind roller is used to store a dirty section of the cleaning strip. This is principally related to dry cleaning of the nozzle outlet face and not to washing/rinsing. Since the nozzle outlet face and the nozzle are highly sensitive, there is a risk of damaging them in dry cleaning.
Disclosure of Invention
The object of the present invention is to provide a printing press for inkjet printing, in which the printing bar can be cleaned without the risk of damage.
This object is achieved by a printing press having the features according to the invention. The printing machine according to the invention comprises: a print beam for jetting ink; a cleaning device having a belt for cleaning the printing beam; and an inspection device for inspecting the moisture of the strip.
The advantage of the printing machine according to the invention is that in the printing machine the printing beam can be wet wiped (i.e. washed/cleaned) by means of the strip. The hard shell skin (Verkrustung) peels off more easily during washing than during dry cleaning, with less risk of damaging the printing beams. By means of the checking device it is ensured that: the strips had the moisture required for washing when applied.
Different advantageous refinements are possible:
the inspection device can work on the principle of resistance-humidity measurement (widerstandsfecuhtemessung). The inspection device can have a first electrode contact and a second electrode contact, which are arranged on the printing beam.
The first electrode contact and the second electrode contact can be arranged at a contact spacing (kontaktend) from each other, which is smaller than the bandwidth of the strip. A horizontal guide can be provided which guides the printing beam and here first brings the first and second electrode contacts into contact with the strip and subsequently brings the nozzle face of the printing beam into contact with the strip.
The X-Y guides that guide the print beam to the cleaning device may include horizontal guides and vertical guides.
The cleaning device may have a moistening device for moistening the strip with detergent.
The cleaning device may have a supply reel for the tape and a pressing element for pressing the tape onto the printing beam, and the humidifying device may be arranged (viewed along the tape) between the supply reel and the pressing element.
A controller may be provided, which has a program running therein, which controls the printing press such that the inspection device inspects the moisture of the strip before cleaning the printing beam with the strip each time.
Drawings
Further advantageous refinements result from the following description of the exemplary embodiments and the associated drawings. The figures show:
FIG. 1: a general view of a digital printer having a print beam and a cleaning device;
FIG. 2: a single front view of the print beam and the cleaning apparatus; and
FIG. 3: a single side view of the print beam and the cleaning apparatus.
Detailed Description
Fig. 1 shows a printing machine with a printing beam 1 for inkjet printing in a Single-Pass method (Single-Pass-Verfahren). The printing beam 1 is directed towards a transport path 2 for the printing material 3. The conveyance path 2 is formed by a drum. The printing material 3 is a sheet. The cylinder conveys the sheet in a conveying direction 4. Outside the transport path 2, a cleaning device 5 for the printing beam 1 is arranged. The printing beam 1 and the cleaning device 5 are arranged in an array of printing beams or cleaning devices, respectively, in order to achieve multicolor printing. Fig. 2 is based on view direction II.
Fig. 2 shows a horizontal guide 6 and a vertical guide 7, which guide the printing beam 1 from the transport path 2 to the cleaning device 5. These two linear guides are indicated by double arrows and together form an X-Y guide. The cleaning device 5 comprises a strip 8 made of textile or felt (so-called washing towel). The strip 8 is unwound from a supply reel 9 and wound after use onto a collection reel 10. A feed drive 11, indicated by an arrow, transports the strip 8 from the reserve reel 9 to the collection reel 10. Between these two reels 9, 10, the strip 8 runs past a pressing element 12, which pressing element 12 presses the strip 8 against the nozzle face 13 of the printing beam 1 during cleaning. The nozzle face 13 may be formed by a plurality of print heads of the print beam 1, which are arranged in an array. The pressing element 12 is configured as a roller. The pressing element 12 has a spring device 14, which spring device 14 generates a pressure between the strip 8 and the nozzle surface 13 during cleaning. Here, the pressing member 12 is retracted by the springing distance a. The strip 8 runs past the humidifying device 15 after the supply reel 9 and before the pressing element 12. The humidifying device 15 applies the washing liquid to the strip 8.
The checking device 23 monitors the correct functional operation of the moistening device 15 in that the checking device 23 measures the humidity of the strip 8 soaked with detergent. The printing beam 1 comprises on one end a first pair of contact electrodes 16 and on the other end a second pair of contact electrodes 17, these pairs of contact electrodes 16, 17 belonging to an examination device 23. Each contact electrode pair 16, 17 comprises two electrode contacts which are flush with the nozzle face 13 and of which only one electrode contact is visible in fig. 2, while the other electrode contact is concealed. A gap having a gap width B exists between the respective electrode contact and the nozzle face 13. These electrode contacts are arranged on an electrical insulator 19 and are connected to the electronic control unit 18 via current conductors, not shown. A controller 18, in which a program runs, controls the printing beam 1 (in particular its drive) for moving it along the guides 6, 7 and the cleaning device 5 (in particular its feed drive 11). Fig. 3 is based on view direction III.
Fig. 3 shows that the first contact electrode pair 16 comprises a first electrode contact 21 and a second electrode contact 22. Between the two electrode contacts 21, 22 there is a contact spacing C which is greater than the plate width D of the nozzle plate 20, which nozzle plate 20 has the nozzle face 13. This enables detection by the two electrode contacts 21, 22: whether the strip 8 is in the correct position or runs laterally away from the pressing element 12. Furthermore, the contact spacing C ensures: the detected wetting of the strip 8 is present over the entire working width of the strip 8, the entire working width of the strip 8 being slightly smaller than the bandwidth E of the strip 8. The contact spacing C is less than the bandwidth E. The area between the two electrode contacts 21, 22 is retracted by approximately 3mm, so that no moisture film is formed there.
The printing beam 1 is moved by its drive along these guides 6, 7 and both the electrode contacts 21, 22 and the nozzle face 13 are brought into contact with the strip 8. These electrode contacts 21, 22 are attached to a measuring bridge, which is an integral part of the examination apparatus 23. The resistance of the strip 8, which is dependent on its humidification, is measured by means of the voltages applied to the electrode contacts 21, 22. If the strip 8 is wet, the resistance of the strip 8 is significantly less than when it is dry.
A first resistance measurement is performed before cleaning of the nozzle face 13 and a second resistance measurement is subsequently performed. Check by means of a first resistance measurement: whether the strip 8 has been humidified by the humidifying device 15 as prescribed. Thereby avoiding contact of the nozzle face 13 with the dry strip 8. Check by means of a second resistance measurement: whether the humidifying device 15 has been operated without interference and has not failed during cleaning of the nozzle face 13. The nozzle face 13 is highly sensitive and may be damaged when the nozzle face 13 is wiped in a dry strip. If the check device 23 confirms that the humidifying device 15 is malfunctioning during cleaning, the check device 23 signals this to the operator, who can thus go to check for damage to the nozzle face 13.
The program run in the controller 18 comprises the steps of:
1. checking the moisture of the strip 8 before cleaning the printing beam 1;
2. cleaning the printing beam 1;
3. after cleaning the printing beam 1, the strip 8 is checked for moisture.
The two electrode contacts of the second contact electrode pair 17 shorten the total time required for the measurement, and the two electrode contacts of the second contact electrode pair 17 are connected in parallel with the two electrode contacts 21, 22 of the first contact electrode pair 16. The measured values of these contact electrode pairs 16, 17 are evaluated in evaluation electronics of a controller 18.
In certain determination situations, where time saving is less desirable, the second contact electrode pair 17 can be omitted.
It is possible here for the electrode contacts 21, 22 of the first contact electrode pair 16 to be designed as parallel strips (Streifen) which each extend from one end of the printing beam 1 to the other end without interruption, as a result of which continuous measurements can be carried out during cleaning.
List of reference numerals:
1 printing beam
2 transport path
3 printing material
4 direction of conveyance
5 cleaning device
6 horizontal guide
7 vertical guide
8 strips
9 Reserve reel
10 collecting reel
11 feed driver
12 pressing element
13 nozzle face
14 spring device
15 humidifying equipment
16 first contact electrode pair
17 second contact electrode pair
18 controller
19 insulator
20 nozzle plate
21 first electrode contact
22 second electrode contact
23 inspection device
A spring distance (Federweg)
Width of gap B
C contact interval
Width of D plate
E bandwidth
Claims (8)
1. A printing press, comprising:
-a printing beam (1) for ink jetting;
-a cleaning device (5) having a strip (8) for cleaning the printing beam (1); and
-an inspection device (23) for inspecting the moisture of the strip (8),
it is characterized in that the preparation method is characterized in that,
the inspection device (23) has a first electrode contact (21) and a second electrode contact (22), which are arranged on the printing bar (1).
2. The printing press as set forth in claim 1,
wherein the inspection device (23) operates according to the principle of resistance-humidity measurement.
3. The printing press as set forth in claim 1,
it is characterized in that the preparation method is characterized in that,
the first electrode contact (21) and the second electrode contact (22) are arranged at a contact spacing (C) from each other, which is smaller than the bandwidth (E) of the strip (8).
4. Printing press according to one of claims 1 to 3,
it is characterized in that the preparation method is characterized in that,
a horizontal guide (6) is provided, which guides the printing beam (1) and in this case first brings a first electrode contact (21) and a second electrode contact (22) into contact with the strip (8) and subsequently brings the nozzle surface (13) of the printing beam (1) into contact with the strip.
5. The printing press as set forth in claim 4,
it is characterized in that the preparation method is characterized in that,
the X-Y guides guiding the printing beam (1) to the cleaning device (5) comprise the horizontal guide (6) and a vertical guide (7).
6. Printing press according to one of claims 1 to 3,
it is characterized in that the preparation method is characterized in that,
the cleaning device (5) has a humidifying device (15) for humidifying the strip (8) with a detergent.
7. The printing press as set forth in claim 6,
it is characterized in that the preparation method is characterized in that,
the cleaning device (5) has a supply reel (9) for the strip (8) and has a pressing element (12) for pressing the strip (8) onto the printing beam (1), and
the humidifying device (15) is arranged between the reserve reel (9) and the pressing element (12) as viewed along the strip (8).
8. Printing press according to one of claims 1 to 3,
it is characterized in that the preparation method is characterized in that,
a controller (18) is provided, which has a program running therein that controls the printing press such that the inspection device (23) inspects the moisture of the strip (8) before cleaning the printing beam (1) with the strip (8) each time.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017220343.9 | 2017-11-15 | ||
| DE102017220343.9A DE102017220343A1 (en) | 2017-11-15 | 2017-11-15 | Printing machine with a pressure bar for inkjet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109774311A CN109774311A (en) | 2019-05-21 |
| CN109774311B true CN109774311B (en) | 2021-07-06 |
Family
ID=63798865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811351228.XA Active CN109774311B (en) | 2017-11-15 | 2018-11-14 | Printing machine with printing beam for jetting ink |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3486089B1 (en) |
| CN (1) | CN109774311B (en) |
| DE (1) | DE102017220343A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10028318B4 (en) | 1999-06-28 | 2017-02-16 | Heidelberger Druckmaschinen Ag | Method and apparatus for cleaning a printhead of an inkjet printer |
| JP2003182098A (en) * | 2001-12-21 | 2003-07-03 | Konica Corp | Inkjet recorder |
| US8342639B2 (en) * | 2009-03-31 | 2013-01-01 | Fujifilm Corporation | Head cleaning method and head cleaning apparatus |
| JP5472143B2 (en) * | 2011-01-31 | 2014-04-16 | ブラザー工業株式会社 | Liquid ejection apparatus and program |
| JP5269929B2 (en) * | 2011-02-24 | 2013-08-21 | 富士フイルム株式会社 | Nozzle surface cleaning apparatus and inkjet recording apparatus |
| JP5653371B2 (en) * | 2012-01-06 | 2015-01-14 | 富士フイルム株式会社 | Nozzle surface cleaning device and image recording device |
| JPWO2018230275A1 (en) * | 2017-06-15 | 2020-03-19 | 富士フイルム株式会社 | Humidifier, maintenance device, and liquid discharge device |
-
2017
- 2017-11-15 DE DE102017220343.9A patent/DE102017220343A1/en not_active Withdrawn
-
2018
- 2018-10-09 EP EP18199231.4A patent/EP3486089B1/en active Active
- 2018-11-14 CN CN201811351228.XA patent/CN109774311B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109774311A (en) | 2019-05-21 |
| DE102017220343A1 (en) | 2019-05-16 |
| EP3486089A1 (en) | 2019-05-22 |
| EP3486089B1 (en) | 2020-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20170120600A1 (en) | Wiping mechanism, liquid droplet jetting apparatus, and wiping method | |
| EP3689615B1 (en) | Liquid discharge device, and liquid discharge head cleaning device and method | |
| US9028039B2 (en) | Image forming apparatus | |
| JP6064446B2 (en) | Recording device | |
| EP0364901B1 (en) | Cleaning system for offset sheet-fed printing presses | |
| CN109774311B (en) | Printing machine with printing beam for jetting ink | |
| US9844943B2 (en) | Wiping mechanism, liquid droplet jetting apparatus, and wiping method | |
| US5135615A (en) | Device for measuring the condition of a felt and for reconditioning it | |
| JP5583182B2 (en) | Head cleaning device and droplet discharge device | |
| CN207697276U (en) | A kind of printer head plug-hole automatic detection device | |
| JP5613082B2 (en) | Wiping unit, maintenance device, liquid ejection device, and wiping method | |
| US9862209B2 (en) | Printing apparatus | |
| JP5889036B2 (en) | Nozzle surface cleaning device and image recording device | |
| JP2018118444A (en) | Image recording device, discharge head cleaning device and discharge head cleaning method | |
| WO2018096893A1 (en) | Inkjet recording device, and device and method for cleaning inkjet head | |
| JP5637022B2 (en) | Static elimination system, static elimination method, and web material processing apparatus | |
| US4088800A (en) | Method for cleaning and re-inking printer ribbons | |
| US4213419A (en) | Apparatus for cleaning and re-inking printer ribbons | |
| CN216993588U (en) | Visual detection mechanism for detecting nozzle abnormality and printing equipment | |
| EP0547328A1 (en) | Film sticking apparatus | |
| JP6847982B2 (en) | Liquid discharge head and liquid discharge device | |
| CN109844446B (en) | Printer system and method for measuring thickness of printing medium | |
| JP7257161B2 (en) | Terminal cleaning device | |
| JP2017132176A (en) | Printer, and printing method | |
| US10065410B2 (en) | Apparatus for cleaning surfaces |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |