EP1227933B1 - Abbrand-aufnehmerrolle in einem druckplattenbelichter - Google Patents
Abbrand-aufnehmerrolle in einem druckplattenbelichter Download PDFInfo
- Publication number
- EP1227933B1 EP1227933B1 EP00965796A EP00965796A EP1227933B1 EP 1227933 B1 EP1227933 B1 EP 1227933B1 EP 00965796 A EP00965796 A EP 00965796A EP 00965796 A EP00965796 A EP 00965796A EP 1227933 B1 EP1227933 B1 EP 1227933B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- roller
- pressure roller
- printing
- printing plates
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/055—Thermographic processes for producing printing formes, e.g. with a thermal print head
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
- B41C1/1075—Mechanical aspects of on-press plate preparation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
- B41C1/00—Forme preparation
- B41C1/02—Engraving; Heads therefor
- B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
- B41C1/05—Heat-generating engraving heads, e.g. laser beam, electron beam
Definitions
- the invention relates to the fields of electronic reproduction technology and printing technology and relates to a device for the removal of burnt-off residues in an platesetter for printing plates.
- an exposure unit moves axially Direction along a rotating drum onto which one to be exposed Pressure plate is tensioned.
- the exposure unit generates one or more laser beams, which are modulated with image signal values and which have one or more circumferential lines Expose pixel by pixel on the printing plate. This gives the printing plate surface the property later on in the printing press to accept or reject exposed areas depending on the type the pressure plate used.
- thermal printing plates due to the high energy of the laser beams an existing on the printing plate Selectively burned surface layer. Thermal printing plates are advantageous because they don't need chemical development after exposure, environmentally friendly and are used for printing immediately after exposure can.
- Burning residues in the Exposure path of a laser beam get lost and cause energy loss thereby generate exposure errors. Burning residues can occur after a long period of operation through deposition on different functional units in the exposure device cause all sorts of unpredictable malfunctions. Burning residues that adhere to the exposed printing plate are transferred during the Bracing the printing plate from the imagesetter onto one for the bracing process used pressure roller and can then when clamping a new pressure plate be transferred from the same pressure roller to the new printing plate.
- the invention is therefore based on the object of a device for removal of residual burns in an imagesetter for thermal printing plates which significantly improves the removal of the scraps, so that scraps remain caused errors can no longer occur.
- Fig. 1 shows the basic operation of an imagesetter for thermal printing plates According to the state of the art.
- Pressure plate (1) clamped on a plate drum (2).
- the front edge the pressure plate (1) with clips not shown on the plate drum (2) fixed.
- the pressure plate (1) with slow rotation of the plate drum (2) wound on the plate drum (2), with a pressure roller (3) the pressure plate (1) presses on the plate drum (2).
- an exposure head (4) generates one or more Laser beams (5) that are modulated with image signal values.
- the disc drum (2) rotates with the clamped printing plate (1), and the exposure head (4) moves in the axial direction along the plate drum (2), so that the Printing plate (1) is exposed line by line.
- the laser beams (5) burn selectively Parts of a surface layer of the pressure plate (1) go away, causing the pressure plate (1) receives the property later in the press at certain locations To accept printing ink and not to accept printing ink in the remaining places. Burning residues arising during the exposure are removed by a suction device (6) suctioned off and discharged.
- the plate drum (2) After exposure, the plate drum (2) is slowly rotated in the opposite direction, to tension the exposed printing plate (1) again.
- the Pressure plate again guided by the pressure roller (3).
- the device described has the disadvantage that burned-off residues that have not been suctioned off are exposed on the Pressure plate (1) stick, when tensioning the pressure plate (1) on the pressure roller (3) transferred and then again when clamping a new printing plate be transferred from the pressure roller (3) to the new printing plate.
- Fig. 2 shows the operation of an imagesetter for thermal printing plates with the device according to the invention.
- the pressure roller (3) there is one Pickup roller (7) which is in contact with the pressure roller (3) and which is preferably has an adhesive surface.
- the adhesive surface of the take-up roll (7) is, for example, by a coating with rubber or with silicone material reached.
- the pressure roller (3) is provided with a non-stick surface, for example is achieved by coating with a smooth plastic film. Through the non-stick surface of the pressure roller (3) are considerably less on the Burning residues adhering to the pressure plate (1) are picked up by the pressure roller (3).
- the burnt-off residues that stick to the exposed printing plate (1) interfere not when printing because it is caused by the dampening in the printing press wash the printing plate with water and ink.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacture Or Reproduction Of Printing Formes (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Description
- Fig. 1
- die prinzipielle Funktionsweise eines Belichters für thermische Druckplatten nach dem Stand der Technik, und
- Fig. 2
- die Funktionsweise eines Belichters für thermische Druckplatten mit der erfindungsgemäßen Vorrichtung.
Claims (3)
- Belichtungseinrichtung zur Belichtung von thermischen Druckplatten (1) durch selektives Abbrennen der Druckplattenoberfläche, versehen mit einer Plattentrommel (2) zur Aufnahme der Druckplatten und einer Andruckrolle (3), die beim Aufspannen und Abspannen der Druckplatten (1) die Druckplatten an die Plattentrommel (2) andrückt, dadurch gekennzeichnet, daß eine Aufnehmerrolle (7) vorgesehen ist, die mit der Andruckrolle (3) im Kontakt ist, und die auf der Andruckrolle (3) haftende Abbrandreste aufnimmt.
- Belichtungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Aufnehmerrolle (7) eine haftende Oberfläche hat.
- Belichtungseinrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Andruckrolle (3) eine nichthaftende Oberfläche hat.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19942409A DE19942409A1 (de) | 1999-09-06 | 1999-09-06 | Abbrand-Aufnehmerrolle in einem Druckplattenbelichter |
DE19942409 | 1999-09-06 | ||
PCT/DE2000/002958 WO2001017776A1 (de) | 1999-09-06 | 2000-08-31 | Abbrand-aufnehmerrolle in einem druckplattenbelichter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1227933A1 EP1227933A1 (de) | 2002-08-07 |
EP1227933B1 true EP1227933B1 (de) | 2003-07-02 |
Family
ID=7920925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00965796A Expired - Lifetime EP1227933B1 (de) | 1999-09-06 | 2000-08-31 | Abbrand-aufnehmerrolle in einem druckplattenbelichter |
Country Status (5)
Country | Link |
---|---|
US (1) | US6736066B2 (de) |
EP (1) | EP1227933B1 (de) |
JP (1) | JP3484432B2 (de) |
DE (2) | DE19942409A1 (de) |
WO (1) | WO2001017776A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013114706B4 (de) * | 2013-12-20 | 2017-02-16 | Sandvik Surface Solutions Division Of Sandvik Materials Technology Deutschland Gmbh | Reinigung von Pressblechen oder umlaufenden Pressbändern |
JP6389695B2 (ja) * | 2014-08-18 | 2018-09-12 | 理想科学工業株式会社 | 感熱製版装置 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3807853A (en) * | 1972-08-09 | 1974-04-30 | Xerox Corp | Electrophotographic cleaning apparatus |
JPS58202232A (ja) * | 1982-05-20 | 1983-11-25 | Canon Inc | 給送ロ−ラ−清掃装置 |
DE4438347C1 (de) * | 1994-10-27 | 1996-02-22 | Roland Man Druckmasch | Verfahren zum Reinigen eines Zylinders einer Druckmaschine |
DE29512758U1 (de) * | 1995-08-08 | 1995-10-19 | Heidelberger Druckmaschinen Ag, 69115 Heidelberg | Reinigungsvorrichtung zum Reinigen von Zylindern einer Druckmaschine |
DE19600846C1 (de) * | 1996-01-12 | 1997-04-03 | Heidelberger Druckmasch Ag | Vorrichtung zur Reinigung direkt bebilderter Druckformen in einer Druckmaschine |
DE19602328A1 (de) * | 1996-01-24 | 1997-07-31 | Roland Man Druckmasch | Verfahren zum Bebildern einer löschbaren Druckform |
US5934197A (en) * | 1997-06-03 | 1999-08-10 | Gerber Systems Corporation | Lithographic printing plate and method for manufacturing the same |
DE19723310A1 (de) * | 1997-06-04 | 1998-12-10 | Kba Planeta Ag | Einrichtung zum Entwickeln von zylindrischen Oberflächen |
US5870954A (en) * | 1998-01-22 | 1999-02-16 | Presstek, Inc. | Retractable cleaning system for lithographic printing plates |
DE19860190A1 (de) * | 1998-02-04 | 1999-08-05 | Heidelberger Druckmasch Ag | Vorrichtung zur Reinigung eines Zylinders in einer Druckmaschine |
JP3767778B2 (ja) * | 1999-03-31 | 2006-04-19 | 富士写真フイルム株式会社 | 記録装置 |
US6196128B1 (en) * | 1999-04-20 | 2001-03-06 | Frank C. Corrado | Traversing contact cleaning roller cleaner |
-
1999
- 1999-09-06 DE DE19942409A patent/DE19942409A1/de not_active Withdrawn
-
2000
- 2000-08-31 EP EP00965796A patent/EP1227933B1/de not_active Expired - Lifetime
- 2000-08-31 DE DE50002770T patent/DE50002770D1/de not_active Expired - Lifetime
- 2000-08-31 WO PCT/DE2000/002958 patent/WO2001017776A1/de active IP Right Grant
- 2000-08-31 JP JP2001521547A patent/JP3484432B2/ja not_active Expired - Fee Related
-
2002
- 2002-03-01 US US10/086,297 patent/US6736066B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US20020088359A1 (en) | 2002-07-11 |
JP2003508275A (ja) | 2003-03-04 |
WO2001017776A1 (de) | 2001-03-15 |
DE50002770D1 (de) | 2003-08-07 |
DE19942409A1 (de) | 2001-03-08 |
EP1227933A1 (de) | 2002-08-07 |
JP3484432B2 (ja) | 2004-01-06 |
US6736066B2 (en) | 2004-05-18 |
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