CN107379790B - Conveyor belt for printed sheets - Google Patents
Conveyor belt for printed sheets Download PDFInfo
- Publication number
- CN107379790B CN107379790B CN201710307808.8A CN201710307808A CN107379790B CN 107379790 B CN107379790 B CN 107379790B CN 201710307808 A CN201710307808 A CN 201710307808A CN 107379790 B CN107379790 B CN 107379790B
- Authority
- CN
- China
- Prior art keywords
- conveyor belt
- printed sheets
- projections
- belt according
- vacuum
- 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
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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
Abstract
The invention relates to a conveyor belt for printed sheets, comprising recesses (12) in which projections (18) for supporting the printed sheets and vacuum openings (11) are arranged in each case.
Description
Technical Field
The invention relates to a conveyor belt for printed sheets, said conveyor belt having vacuum openings.
Background
By means of such a conveyor belt, sheets can be transported in the printing press. The vacuum opening is used to hold the printed sheets.
The problems that arise are: the specifications of the printed sheets may differ (e.g., between print jobs). This may result in more or less vacuum openings being covered by the printed sheets. The uncovered vacuum openings are disadvantageous with regard to false air and turbulence.
In DE 102009048928 a1, it is proposed to minimize the gaps between successive sheets and to transport them in an ideal manner in a side-by-side manner (Sto β an Sto β).
In the prior art, the position of the sheets relative to each other is important, whereas the position of the sheets relative to the vacuum opening is not. This presents the risk of: if the sheet edges are located on the vacuum openings, these sheet edges can be deformed. This risk is particularly common in the case of sheets consisting of thin paper.
Disclosure of Invention
The object of the invention is to provide a transport belt suitable for printed sheets made of tissue paper.
This object is achieved by a conveyor belt for printed sheets, comprising a groove (Mulden) in which a projection for supporting the printed sheets and a vacuum opening are arranged in each case.
A large area and thus reliable suction is ensured by these grooves. These projections prevent the sheet edges from sagging too strongly in the recesses
In one embodiment, the vacuum opening is arranged between the projections. In a further development, the projections are arranged so as to be evenly distributed around the vacuum opening. In a further embodiment, bridges (Steg) are arranged between the grooves, which bridges together form a grid (Rastergitter). In a further embodiment, the projections end flush with the bridge. In a further embodiment, the recesses each have edges which form a polygonal contour. In a further embodiment, the polygonal contour is a square. In a further embodiment, the polygonal contour has rounded internal angles. In a further embodiment, the recess and the projection are formed by etching a junctionStructure of the organization
And (4) forming. In a further embodiment, the conveyor belt is a steel belt.
Drawings
Further developments of the conveyor belt according to the invention result from the following description of the embodiments and the accompanying drawings.
In the drawings:
FIG. 1: the transport device for the printed sheets is shown in a side view,
FIG. 2: the conveyor of figure 1 is shown in a top view,
FIG. 3: the conveyor belt of the conveyor is shown in an enlarged view,
FIG. 4: a cross section of the conveyor belt is cut along a cutting line IV in FIG. 3, an
FIG. 5: another cross section of the conveyor belt is cut along the cutting line V in fig. 3.
Detailed Description
Fig. 1 and 2 show a printing press 1 in a detail view. The printing machine 1 comprises a printing head for inkjet printing, which is not shown together in the figures. The printing press 1 also comprises a transport device 2 for transporting the sheets 3, which transport device 2 can be seen in the detail view. The transport device 2 transports the printed sheets 3 past a printing head, which prints the printed sheets 3.
The conveying device 2 comprises a conveyor belt 4, on the upper run 5 of which conveyor belt 4 the printed sheets 3 are located during their conveyance. The conveyor belt 4 is endless and runs around two rollers 6, the conveyor belt 4 being driven by one of the two rollers and the other roller diverting the conveyor belt 4. The direction 7 is indicated by an arrow, which direction 7 corresponds to the direction of rotation of the conveyor belt 4 and the direction of transport of the printed sheets 3. Guide plates 8 for guiding the printed sheets 3 are arranged in front of and behind the transport device 2. The transport device 2 receives the printed sheets 3 from one guide plate 8 and, after printing on the printed sheets 3, delivers the printed sheets 3 to the other guide plate 8.
Between the two rollers 6 a suction air tank 9 is arranged, which suction air tank 9 is connected to a vacuum source 10, which vacuum source 10 is schematically shown. The lower side of the section 5 rests against the suction air box 9. The upper side of the suction air box 9 directed toward the section 5 has a window, which is not shown in the figures. Through holes forming vacuum openings 11 are machined in the conveyor belt 4. Through the window in the suction air tank 9, the vacuum openings 9 passing through the window are subjected to vacuum in such a way that these vacuum openings 9 are temporarily fluidically connected to a suction air source 10.
The format of the printed sheets 3 may differ from one another not only in the format length (which can be measured along the direction 7) but also in the format width (which can be measured perpendicular to the direction 7). In the example shown in the figures, the specifications of the printed sheets 3 differ from each other only in terms of the specification length. The conveying device 2 has a format width adjustment setting device, which is not shown together in the figures. The specification width adjustment setting means may be used in a case where the specification width is smaller than the maximum specification. In the case of such a format width, there are vacuum openings 11 which are not covered by the sheet 3, the vacuum openings 11 being located on the left and right (viewed in the direction 7) of the sheet 3. In order to prevent such a vacuum opening 11 not covered by the sheet 3 from introducing false air, the specification width adjustment setting device is used. By means of the format width adjustment setting device, vacuum openings 11 lying outside the format width (these vacuum openings 11 are not covered by printed sheets 3 on the outside of the conveyor belt 4) are covered on the inside of the conveyor belt 4 (for example by two movable shutter plates of the format width adjustment setting device).
Fig. 3 to 5 show the surface structure of the conveyor belt 4 carrying the sheets 3 in more detail. The conveyor belt 4 is made of metal (preferably steel), advantageously: the surface structure is made as an etched structure 16. This surface structure is Relief (Relief) and is formed by a trough
Or a grid (master) formed by grooves 12. The grid width of such a grid is shown exaggerated in the figures in order to be able to better see the details. In practice, the grid width is5mm (for example in the case of a sheet 3 having a format length of about 250 mm). The grid width is expressed as: the spacing between the center of a groove 12 and the center of an adjacent groove 12. The depth of the grooves 12 may be 0.05 to 0.10mm (for example, in the case where the thickness of the conveyor belt 4 (belt thickness) is 0.3 mm).
In the bottom of each groove 12, a vacuum opening 11 is machined in the center. Extending between these grooves 12 are sealing lips or bridges 13, which sealing lips or bridges 13 together form a grid or mesh. Each groove 12 is bounded around by a bridge 13, which bridge 13 forms a side wall of the groove 12.
These webs 13 form the annular edge of each pocket 12 in the transport plane 17 of the printed sheet 3. The edges may have a rounded profile, but it is more advantageous with regard to the bridge 13 having an equally thin configuration over the entire bridge length: the variant of the edge shown in the figure has a polygonal contour 14. This likewise thin configuration is advantageous: the open surface portion of the pocket 12 is maximized to reliably hold the printed sheet 3 pneumatically. In the example shown in the figures, the profile 14 is a quadrilateral (in particular a rectangle or a square). In a variant not shown in the figures, the grooves 12 may be diamond-shaped with diamond sides or honeycomb-shaped with hexagonal sides. Of all possible annular shapes of the edge (for example square annular shapes), it is important for the vacuum to be formed in the groove 12: the annular shape is uninterrupted, that is to say extends as a closed loop. In all cases, it is advantageous with respect to stability: the inner corners 15 of the profile 14 are rounded.
In each groove 12, a plurality of supports or projections 18 are arranged evenly distributed around the vacuum opening 11. These projections 18 pass through the column of material that remains during etching
Formed and protruding from the bottom of the groove 12. Each recess 12 is provided in particular with four projections 18, wherein these projections 18 are arranged at the corner points of an imaginary square. The projection 18 and the true of each groove 12The empty openings 11 are arranged on two imaginary diagonals of the square contour 14, wherein the vacuum openings 11 are in the intersection of these diagonals.
As can be seen in fig. 4 and 5: each projection 18 projects right out until the conveying plane 17 ends flush with the bridge 13. These projections 18 and the flat upper side of the bridge 13 together form the outer surface of the conveyor belt 4 on which the printed sheets 3 are located. These projections 18 serve to support the sheet 3 on the edges or edges.
In fig. 3 can be seen: the projections 18 each have a circular cross section, wherein the area of these cross sections is greater than the area of the likewise circular cross section of the vacuum opening 11. These projections 18 are cylindrical.
In fig. 2 can be seen: the grooves 12 are arranged in the columns and rows of the grid. These columns extend parallel to the direction of transport 7, and these rows extend perpendicular to the columns and perpendicular to the direction 7. The printed sheet 3 is transported in this way: accordingly, the rear edge of the preceding sheet 3 and the front edge of the following sheet 3 cover the same row of recesses 12 or project into these recesses 12. In this case, a certain distance is maintained between the front edge and the rear edge of adjacent sheets 3.
Since the printed sheets 3 lie on the projections 18 at the front and rear edges or at least in the edge regions adjacent to the edges and are supported by these projections 18, the sheet edges and sheet corners are also securely held on the belt 4 without the risk of the edges and corners standing up or folding up. Raised or folded edges and corners are otherwise dangerous for the inkjet print head, which may collide with the nozzle plate of the inkjet print head when passing the inkjet print head, thereby possibly damaging the nozzle plate. The conveyor belt 4 according to the invention can therefore be used particularly advantageously in a printing machine 1 with an inkjet printing head which can be brought particularly close to the segment 5 in the conveyor belt 4 according to the invention, which is advantageous in terms of print quality.
In a variant not shown in the figures, each groove 12 is provided with two vacuum openings 11, said vacuum openings 11 being machined in the bottom of the groove 12. That is, an additional vacuum opening 11 is provided in addition to the vacuum opening 11 shown in the drawings.
The two vacuum openings 11 provided per recess 12 have a center offset with respect to each other, which can be measured in the transverse direction of the conveyor belt 4, i.e. perpendicularly to the direction 7 (direction of rotation). The centers of the two vacuum openings 11 can additionally also be offset from one another in the direction 7 of rotation of the conveyor belt 4, but this is not essential.
List of reference numerals
1 printing machine
2 conveying device
3 printed sheet
4 conveyor belt
5 section (Trum)
6 roller
7 directions
8 guide plate
9 suction air box
10 vacuum source
11 vacuum opening
12 grooves
13 bridge parts
14 profile
15 inner angle
16 etch structure
17 plane of conveyance
18 projection
Claims (9)
1. A conveyor belt for printed sheets, comprising a surface structure carrying the printed sheets (3), said surface structure being formed by a grid formed by recesses (12) in which projections (18) for supporting the printed sheets (3) and vacuum openings (11) are arranged, respectively,
wherein the conveyor belt (4) is made of metal,
the grooves (12) and the projections (18) are formed by etching structures (16), and
the projections (18) are formed by columns of material that remain during etching.
2. The conveyor belt according to claim 1, wherein,
wherein the vacuum openings (11) are arranged between the protrusions (18).
3. The conveyor belt according to claim 1 or 2,
wherein the protrusions (18) are arranged evenly distributed around the vacuum opening (11).
4. The conveyor belt according to claim 1 or 2,
wherein between the grooves (12) there are arranged bridges (13) which together form a grid.
5. The conveyor belt according to claim 4,
wherein the projection (18) ends flush with the bridge (13).
6. The conveyor belt according to claim 1 or 2,
wherein the grooves (12) each have edges which form a polygonal contour (14).
7. The conveyor belt according to claim 6,
wherein the polygonal contour (14) is a square.
8. The conveyor belt according to claim 6,
wherein the polygonal contour (14) has rounded internal angles.
9. The conveyor belt according to claim 1 or 2,
wherein the conveyor belt (4) is a steel belt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016208074.1 | 2016-05-11 | ||
| DE102016208074.1A DE102016208074A1 (en) | 2016-05-11 | 2016-05-11 | Conveyor belt for printed sheets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107379790A CN107379790A (en) | 2017-11-24 |
| CN107379790B true CN107379790B (en) | 2020-06-19 |
Family
ID=58536816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710307808.8A Active CN107379790B (en) | 2016-05-11 | 2017-05-04 | Conveyor belt for printed sheets |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3243779B1 (en) |
| CN (1) | CN107379790B (en) |
| DE (1) | DE102016208074A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2813821C1 (en) * | 2020-07-16 | 2024-02-19 | Сам Секьюрити Принтинг Матбаа Аноним Ширкети | System and method for printing documents and securities with protection against forgery |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021014296A1 (en) * | 2019-07-19 | 2021-01-28 | Mamizadeh Hassan | A printing system of security materials and anti-forgery documents with raised printing and process thereof |
| DE102020125412A1 (en) | 2020-09-29 | 2022-03-31 | Koenig & Bauer Ag | Device for transporting sheet metal panels coated up to their front edge and/or rear edge related to their transport direction |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2969869A (en) * | 1957-09-12 | 1961-01-31 | Karl A Klingler | Vacuum delivery belt |
| AU469501B2 (en) * | 1972-06-15 | 1976-02-12 | Tokyo Shibaura Electric Co. Suz | Apparatus for selectively taking out sheetlike articles |
| US3889801A (en) * | 1972-10-26 | 1975-06-17 | Bell & Howell Co | Vacuum conveyor belt with air bearing |
| JPS55176246U (en) * | 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 (en) * | 1994-03-02 | 1997-06-19 | Heidelberger Druckmasch Ag | Device for uniform suction of a flat body on a base, in particular for printing presses and their accessories |
| US5706994A (en) * | 1995-06-26 | 1998-01-13 | Marquip, Inc. | Vacuum assisted web drive for corrugator double backer |
| DE29515857U1 (en) * | 1995-10-06 | 1995-12-07 | Rrg Industrietechnik Gmbh | Conveyor |
| DE19839314B4 (en) * | 1998-02-18 | 2007-03-01 | Heidelberger Druckmaschinen Ag | Method and device for transporting sheets by means of at least one conveyor belt to which the sheets are fixed on the transport path |
| WO2000034158A1 (en) * | 1998-12-08 | 2000-06-15 | The Langston Corporation | Vacuum assist transfer belt |
| DE10010970A1 (en) * | 1999-03-26 | 2000-10-12 | Heidelberger Druckmasch Ag | Suction belt conveyor for printing machine has a belt whose surface has slits forming grid structure into which bores which cross the belt open |
| KR100788660B1 (en) * | 2005-01-18 | 2007-12-26 | 삼성전자주식회사 | Image scanning/printing apparatus and image scanning/printing method thereof |
| JP2008080526A (en) * | 2006-09-26 | 2008-04-10 | Brother Ind Ltd | Liquid jet apparatus |
| DE102009048928A1 (en) | 2009-10-10 | 2011-04-14 | Steinemann Technology Ag | Inkjet printer for printing on sheet-shaped substrate, has printing unit transport device including conveyor belt with drive device that impresses speed to belt, where printing sheet or substrate is provided with certain distance to belt |
| JP5543564B2 (en) * | 2011-12-27 | 2014-07-09 | 富士フイルム株式会社 | Inkjet recording device |
-
2016
- 2016-05-11 DE DE102016208074.1A patent/DE102016208074A1/en not_active Withdrawn
-
2017
- 2017-04-10 EP EP17165699.4A patent/EP3243779B1/en active Active
- 2017-05-04 CN CN201710307808.8A patent/CN107379790B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2813821C1 (en) * | 2020-07-16 | 2024-02-19 | Сам Секьюрити Принтинг Матбаа Аноним Ширкети | System and method for printing documents and securities with protection against forgery |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3243779B1 (en) | 2020-07-15 |
| CN107379790A (en) | 2017-11-24 |
| EP3243779A1 (en) | 2017-11-15 |
| DE102016208074A1 (en) | 2017-11-16 |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| GR01 | Patent grant |