EP3243779B1 - Bande de transport pour feuilles d'impression - Google Patents

Bande de transport pour feuilles d'impression Download PDF

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Publication number
EP3243779B1
EP3243779B1 EP17165699.4A EP17165699A EP3243779B1 EP 3243779 B1 EP3243779 B1 EP 3243779B1 EP 17165699 A EP17165699 A EP 17165699A EP 3243779 B1 EP3243779 B1 EP 3243779B1
Authority
EP
European Patent Office
Prior art keywords
conveyor belt
printed sheets
vacuum
protrusions
webs
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
Application number
EP17165699.4A
Other languages
German (de)
English (en)
Other versions
EP3243779A1 (fr
Inventor
Markus Möhringer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP3243779A1 publication Critical patent/EP3243779A1/fr
Application granted granted Critical
Publication of EP3243779B1 publication Critical patent/EP3243779B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B41J13/08—Conveyor bands 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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/24—Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/241—Suction devices
    • B65H29/242—Suction bands or belts
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
    • B65H5/222—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices
    • B65H5/224—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices by suction belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/50—Surface of the elements in contact with the forwarded or guided material
    • B65H2404/51—Cross section, i.e. section perpendicular to the direction of displacement
    • B65H2404/513—Cross section, i.e. section perpendicular to the direction of displacement with limited number of active areas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts
    • B65H2406/322—Suction distributing means
    • B65H2406/3223—Suction distributing means details of the openings in the belt, e.g. shape, distribution

Definitions

  • the present invention relates to a conveyor belt for printed sheets which has vacuum openings. With such conveyor belts, printed sheets are transported in printing machines. The vacuum openings serve to hold the printed sheets.
  • One problem is that the format of the printed sheets can vary, for example from print job to print job. This can lead to more or fewer vacuum openings being covered by the printed sheets. Uncovered vacuum openings are unfavorable with regard to incorrect air and turbulence.
  • EP 2 610 064 A1 describes a conveyor belt for printed sheets according to the preamble of claim 1, which has troughs and vacuum openings arranged therein.
  • WO 97/49554 A1 describes a web conveyor belt that has a series of openings that can be acted upon by vacuum.
  • the band includes support elements for the web.
  • JPS55176246 U describes a conveyor belt for sheets that has troughs, each with a projection and two vacuum openings therein.
  • the object of the invention is to provide a conveyor belt suitable for printing sheets made of thin paper.
  • the troughs ensure a large and therefore safe suction.
  • the projections prevent the arch edge from sagging too much in the respective trough.
  • the protrusions end flush with the webs.
  • the troughs each have an edge which forms a polygonal contour.
  • the polygonal contour is square.
  • the polygonal contour has rounded inner corners.
  • the printing press 1 comprises a print head for inkjet printing, which is not shown in the drawing.
  • the printing press 1 comprises a transport device 2 for transporting printed sheets 3, which can be seen in the detail.
  • the Transport device 2 transports the printed sheets 3 past the print head, which prints the printed sheets 3.
  • the transport device 2 comprises a conveyor belt 4, on the upper run 5 of which the printed sheets 3 lie during their transport.
  • the conveyor belt 4 is endless and runs around two rollers 6, one of which drives the conveyor belt 4 and the other deflects the conveyor belt 4.
  • An arrow 7 indicates a direction which corresponds to the direction of rotation of the conveyor belt 4 and the direction of transport of the printed sheets 3.
  • a guide plate 8 for guiding the printing sheets 3 is arranged in front of and behind the transport device 2.
  • the transport device 2 takes over the printed sheets 3 from one guide plate 8 and releases the printed sheets 3 after their printing to the other guide plate 8.
  • a suction air box 9 is arranged between the two rollers 6 and is connected to a vacuum source 10, which is shown symbolically.
  • the underside of the strand 5 lies against the suction air box 9.
  • the top of the suction air box 9 facing the run 5 has a window which is not shown in the drawing.
  • Through holes are formed in the conveyor belt 4, which form vacuum openings 11. The vacuum openings 9 running past it are acted upon by vacuum via the window mentioned in the suction air box 9 by temporarily connecting them to the suction air source 10 in terms of flow technology.
  • the formats of the printed sheets 3 can differ not only in the format length that is to be measured in the direction 7, but also in the format width that is to be measured perpendicular to the direction 7. In the example shown in the drawing, the formats of the printed sheets 3 differ from one another only in the format length.
  • the transport device 2 has a format width setting device, which is not shown in the drawing.
  • the format width setting device is used for format widths that are smaller than the maximum format. With such format widths, there are vacuum openings 11 which are not covered by the printing sheet 3 and which, viewed in the direction 7, are to the left and right of the printing sheet 3.
  • the format width adjustment device is used to ensure that such vacuum openings 11, which are not covered by the printed sheet 3, do not draw in incorrect air used. With the format width adjustment device, the vacuum openings 11 lying outside the format width, which are not covered on the outside of the conveyor belt 4 by the printed sheet 3, are covered on the inside of the conveyor belt 4, for example by two displaceable screens of the format width adjustment device.
  • the conveyor belt 4 consists of metal, preferably steel, which is advantageous with regard to the production of the surface structure as an etching structure 16.
  • the surface structure is a relief and is formed by a grid of cells or troughs 12. The grid size of the grid is exaggerated in the drawing so that the details are easier to see.
  • the raster width can be 5 mm, for example with printed sheet 3 with a format length of approx. 250 mm.
  • the raster width means the distance between the center of a trough 12 and the center of the adjacent trough 12.
  • the depth of the troughs 12 can be 0.05 mm to 0.10 mm, for example with a thickness of the conveyor belt 4 (belt thickness) of 0.30 mm.
  • One of the vacuum openings 11 is made centrally in the bottom of each trough 12. Sealing lips or webs 13, which together form a grid or grid, run between the troughs 12. Each trough 12 is bounded by webs 13, which form the side walls of the trough 12.
  • the webs 13 form the annular edge of the respective trough 12.
  • This edge could have a circular contour, but the variant of the edge with a polygonal contour 14 shown in the drawing is a thin construction of the webs that is uniformly thin over the entire web length 13 more advantageous.
  • the uniformly thin design is in turn advantageous in terms of maximizing the open area portion of the troughs 12 and thus a secure pneumatic holding of the printed sheets 3.
  • the contour 14 is square, especially rectangular or square.
  • the trough 12 can be a diamond shape with a rhombic edge or one Have a honeycomb shape with a hexagonal edge. With all possible ring shapes of the edge, e.g.
  • each trough 12 a plurality of supports or projections 18 are arranged in a uniform distribution around the vacuum opening 11.
  • the projections 18 are formed by material columns which have remained during the etching and protrude from the bottom of the depression 12. Specifically, there are four projections 18 per depression 12, the projections 18 being arranged on the corner points of an imaginary square.
  • the projections 18 and the vacuum opening 11 of the respective trough 12 are arranged on the two imaginary diagonals of the square contour 14, the vacuum opening 11 being located at the intersection of the two diagonals.
  • each projection 18 extends exactly to the transport plane 17 and thus ends flush with the webs 13.
  • the flat tops of the projections 18 and the webs 13 together form the outer surface of the conveyor belt 4 on which the printed sheets 3 lie.
  • the projections 18 serve to support the printed sheets 13 on their edges or edges.
  • the projections 18 each have a circular cross section, the area of this cross section being larger than the likewise circular cross sectional area of the vacuum opening 11.
  • the projections 18 are cylindrical.
  • the troughs 12 are arranged in longitudinal rows and transverse rows of the grid.
  • the longitudinal rows run parallel to the direction 7 of the transport and the transverse rows run perpendicular to the longitudinal rows and to the direction 7.
  • the printing sheets 3 are transported in such a way that the trailing edge of a preceding printing sheet 3 and the front edge of a subsequent printing sheet 3 enter the troughs 12 and overlap or into the same transverse row 12 protrude.
  • a distance is maintained between the front edge and the rear edge of the adjacent printed sheets 3.
  • the sheet edges and also the sheet corners are securely held on the conveyor belt 4 and there is no risk of erecting or turning the Edges and corners. Raised or folded edges and corners would otherwise pose a danger to the inkjet printhead, the nozzle plate of which could collide as it passed, which could damage the nozzle plate.
  • the conveyor belt 4 according to the invention can therefore be used particularly advantageously in printing presses 1 with an ink jet print head, which can reach particularly close to the run 5 in the conveyor belt 4 according to the invention, which in turn is advantageous in terms of print quality.
  • two vacuum openings 11 are provided per well 12, which are introduced into the bottom of the well 12. This means that an additional vacuum opening 11 is added to the vacuum opening 11 shown in the drawing.
  • the two vacuum openings 11 provided per trough 12 have a center offset to one another, which is to be measured in the transverse direction of the conveyor belt 4, that is to say perpendicular to the direction 7 (direction of rotation).
  • the centers of the two vacuum openings 11 can also be offset from one another in the direction 7 of the circulation of the conveyor belt 4, but they do not necessarily have to be.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Claims (5)

  1. Convoyeur à bande pour feuilles d'impression, comportant des cavités (12) entre lesquelles sont disposés des pontets (13), formant ensemble un quadrillage, caractérisé en ce que des saillies (18) destinées à supporter les feuilles d'impression (3) et un orifice à vide (11) sont respectivement disposés dans les cavités (12), l'orifice à vide (11) étant agencé entre les saillies (18), les saillies (18) étant agencées régulièrement autour de l'orifice à vide (11), le convoyeur à bande (4) étant une bande en acier et les cavités (12) et saillies (18) étant formées par une structure gravée (16).
  2. Convoyeur à bande selon la revendication 1,
    pour lequel les saillies (18) affleurent avec les pontets (13).
  3. Convoyeur à bande selon la revendication 1 ou 2,
    pour lequel les cavités (12) possèdent respectivement un bord formant un contour polygonal (14).
  4. Convoyeur à bande selon la revendication 3,
    pour lequel le contour polygonal (14) est carré.
  5. Convoyeur à bande selon la revendication 3 ou 4,
    pour lequel le contour polygonal (14) présente des angles intérieurs (15) arrondis.
EP17165699.4A 2016-05-11 2017-04-10 Bande de transport pour feuilles d'impression Active EP3243779B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016208074.1A DE102016208074A1 (de) 2016-05-11 2016-05-11 Förderband für Druckbogen

Publications (2)

Publication Number Publication Date
EP3243779A1 EP3243779A1 (fr) 2017-11-15
EP3243779B1 true EP3243779B1 (fr) 2020-07-15

Family

ID=58536816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17165699.4A Active EP3243779B1 (fr) 2016-05-11 2017-04-10 Bande de transport pour feuilles d'impression

Country Status (3)

Country Link
EP (1) EP3243779B1 (fr)
CN (1) CN107379790B (fr)
DE (1) DE102016208074A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4121300A4 (fr) * 2019-07-19 2024-05-29 Sam Security Printing Matbaa Anonim Sirketi Système d'impression de matériaux de sécurité et de documents anti-falsification à impression en relief et procédé associé
DE102020125412A1 (de) 2020-09-29 2022-03-31 Koenig & Bauer Ag Vorrichtung zum Transport von jeweils bis an ihre auf ihre Transportrichtung bezogene Vorderkante und/oder Hinterkante lackierten Blechtafeln

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2969869A (en) * 1957-09-12 1961-01-31 Karl A Klingler Vacuum delivery belt
US3861669A (en) * 1972-06-15 1975-01-21 Tokyo Shibaura Electric Co Apparatus for feeding sheet-like articles from a stack of articles
US3889801A (en) * 1972-10-26 1975-06-17 Bell & Howell Co Vacuum conveyor belt with air bearing
JPS55176246U (fr) * 1979-06-07 1980-12-17
US4878071A (en) * 1988-03-11 1989-10-31 Rastergraphics, Inc. Paper transport and paper stabilizing system for a multicolor electrostatic plotter
DE4406739C2 (de) * 1994-03-02 1997-06-19 Heidelberger Druckmasch Ag Vorrichtung zum gleichmäßigen Ansaugen eines flächigen Körpers auf einer Unterlage, insbesondere für Druckmaschinen und deren Zusatzgeräte
US5706994A (en) * 1995-06-26 1998-01-13 Marquip, Inc. Vacuum assisted web drive for corrugator double backer
DE29515857U1 (de) * 1995-10-06 1995-12-07 RRG Industrietechnik GmbH, 45470 Mülheim Fördervorrichtung
DE19839314B4 (de) * 1998-02-18 2007-03-01 Heidelberger Druckmaschinen Ag Verfahren und Vorrichtung zum Transport von Bogen mittels mindestens eines Transportbandes, an welchem die Bogen auf dem Transportweg fixiert werden
AU1935300A (en) * 1998-12-08 2000-06-26 Langston Corporation, The Vacuum assist transfer belt
DE10010970A1 (de) * 1999-03-26 2000-10-12 Heidelberger Druckmasch Ag Saugbandförderer für eine Bogen verarbeitende Maschine
KR100788660B1 (ko) * 2005-01-18 2007-12-26 삼성전자주식회사 화상입출력장치 및 방법
JP2008080526A (ja) * 2006-09-26 2008-04-10 Brother Ind Ltd 液体噴射装置
DE102009048928A1 (de) 2009-10-10 2011-04-14 Steinemann Technology Ag Vorrichtung zur Bogenführung in einem Tintenstrahldrucker
JP5543564B2 (ja) * 2011-12-27 2014-07-09 富士フイルム株式会社 インクジェット記録装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN107379790A (zh) 2017-11-24
EP3243779A1 (fr) 2017-11-15
DE102016208074A1 (de) 2017-11-16
CN107379790B (zh) 2020-06-19

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