WO2013106904A1 - Automatic online defective elements-checking-and-removing device for flexographic printing presses - Google Patents

Automatic online defective elements-checking-and-removing device for flexographic printing presses Download PDF

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Publication number
WO2013106904A1
WO2013106904A1 PCT/CA2012/050863 CA2012050863W WO2013106904A1 WO 2013106904 A1 WO2013106904 A1 WO 2013106904A1 CA 2012050863 W CA2012050863 W CA 2012050863W WO 2013106904 A1 WO2013106904 A1 WO 2013106904A1
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WO
WIPO (PCT)
Prior art keywords
vacuum
conveying platform
defective
labels
flexographic 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.)
Ceased
Application number
PCT/CA2012/050863
Other languages
French (fr)
Inventor
Ben Wang Liu
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2013106904A1 publication Critical patent/WO2013106904A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/54—Auxiliary folding, cutting, collecting or depositing of sheets or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/24—Rotary letterpress machines for flexographic printing
    • 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
    • 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
    • B65H29/245—Air blast 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
    • B65H29/58—Article switches or diverters
    • B65H29/62—Article switches or diverters diverting faulty articles from the main streams
    • 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
    • B65H2301/40—Type of handling process
    • B65H2301/44—Moving, forwarding, guiding material
    • B65H2301/447—Moving, forwarding, guiding material transferring material between transport devices
    • B65H2301/4473—Belts, endless moving elements on which the material is in surface contact
    • B65H2301/44735—Belts, endless moving elements on which the material is in surface contact suction belt
    • 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
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/12—Means using fluid made only for exhausting gaseous medium producing gas blast
    • B65H2406/122—Nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/192—Labels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention of automatic online checking-and-removing device for defective printed elements and relates to flexographic printing presses currently used in printing industry, adding the function of automatic detection and ejection of defective printed elements such as labels.
  • the invention could be classified into the constructional technology of printing equipment.
  • the purpose of this invention is to offer a more reliable and easily operated function for flexographic printing press, after being installed the automatic online defective elements removing device. It applies to the flexographic printing machine for labels after cutting or cutting the labels.
  • an automatic online defective elements checking and removing device comprising:
  • both of the platforms being mounted on top of a mobile frame; each of the platforms being separately driven by a respective motor; a defective element remover located between the first vacuum conveying platform and the second vacuum and separating conveying platform;
  • an online computerized visual QC station at the fiexographic printing press arranged such that detection of a defective element causes operation of the air ejector
  • a vacuum pump and vacuum distribution tube on the mobile frame; and a valve to adjust the vacuum to the platforms in order to prevent the printed labels from moving on the conveyor belt.
  • the second stage includes a plurality of belts for transporting the QC passed labels.
  • a gap between belts widens from start to end, making gaps between lines of labels during transport on the belts, facilitating the process of collection, counting, packing and stacking.
  • a vacuum chamber is located beneath the first vacuum conveying platform and the second vacuum conveying platform which includes the separating- conveying flat belts.
  • the separating conveyer belt which may comprise one to three flat belts side by side on the second stage, transports at the same time the QC passed labels.
  • the vacuum pump and vacuum distribution tube are connected each other with steel wire reinforced hose.
  • a ball valve is used to adjust the vacuum in order to prevent the printed labels from moving on the conveyor belt.
  • this invention is to reduce defects and maximize quality products.
  • the invention is to help operators find and handle defects in time, thus raise the Quality Control (QC) pass rate, save materials, manpower, space, time and financial investment.
  • QC Quality Control
  • Figure 1 is a side elevational view of one embodiment of the invention.
  • Figure 2 is a top plan view of the embodiment of Figure 1 .
  • an automatic online defective elements removing device which comprises two stages, that is, the first vacuum-conveying platform 6 and the second vacuum and separating-conveying platform 4, both on the top of a mobile frame 1 , separately driven by motors 9 and 10 via toothed belts.
  • the defective elements collector 5 is located between the first vacuum conveying platform 6 and the second vacuum and separating conveying platform 4.
  • the defective removing collection system includes the collector 5 which carries the labels downwardly into a collection container and an air ejector 7 which is operated by a valve in response to an output signal from an online computerized visual QC station 20 at the flexographic printing press 21 which acts to detect defective printed elements.
  • a vacuum pump 3 and vacuum distribution tube 2 connected to each other by steel wire reinforced hose.
  • a ball valve is used to adjust the vacuum in the conveyors 4 and 6 in order to prevent the printed labels from moving from their positions on the conveyor belt.
  • the mobile frame at the bottom has four universal casters 1 1 for easy online and offline combination. There are provided screw bolts 12 for adjusting the height to stabilize the rack.
  • the second stage 4 includes between one and three flat belts 13 at transversely spaced positions arranged to transport at the same time QC passed labels.
  • the gap between belts 13 widens from start to end, making gaps between the lines of labels during transport on the belts, facilitating the process of collection, counting, packing and stacking at the end of the conveyor stage 4.
  • the flexographic printing press equipped with the online automatic defective elements checking and removing device operates as follows.
  • a computerized inspection unit is installed at the flexographic printing press (not shown upstream of the first stage 6) and this checks on line the quality of the printed labels using conventional optical analysis thereof. Once a defective label is detected, the unit reports its position, outputs an alarm, and gives command to the air ejector 7, which afterwards blows the defective label down into the collector 5 which includes slots 5A and transfer duct 5B. QC passed labels go straight to the vacuum and separating conveyor belts 13, from which they are delivered to a delivery table for gap forming, collecting, counting and packing.
  • the invention may provide the following advantages.
  • the invention is to help operators find and handle the current and potential defects in time, thus raise the QC pass rate, save materials, manpower, space, time and money.
  • the online inspection and defective element remover has proved more powerful than 10 to 5 workers by visual check and manual selection.
  • the QC defective elements removing device is installed at a flexographic printing press.
  • On the top of the movable frame 1 there are the first stage vacuum transporting platform 6 and the second stage vacuum separating platform 4, driven via synchronous toothed belts by motor 9 and 10.
  • Defective element removing device 5 is located between the first stage vacuum transporting platform 6 and the second stage vacuum separating platform 4.
  • the defective ejecting air knife 7 is controlled by a magnetic valve which receives command from the computerized QC and visual inspection station installed at the flexographic printing press.
  • Under the frame 1 there are air pump 3, vacuum distribution tube 2, with steel wire enforced hose linked, and further to the vacuum chambers for the first stage vacuum transporting platform 6 and the second stage vacuum separating platform 4.
  • a ball valve is used to adjust the vacuum to prevent labels from moving on the conveyors.
  • the flat belts 13 on the second stage vacuum separating platform transport 4 feed QC passed labels side by side to the delivery table for collecting, counting and packing.
  • Quality inspection of printed labels is performed by means of machine vision, that is computerized visualization or image analysis. Labels are scanned and digital image signals are attained via photo electric technology. The image is transmitted to a professional image processor where its features like pixel, brightness, color are analyzed and appraised. Action is taken according to the judgment.
  • This computerized visual quality inspection has the advantage of non- contact, high speed, and vast storage of information. It gets smaller but more intelligent with the development of computer technology.
  • Defect detection includes omission, dirty dots, broken words, white dots, mis-registration, etc.
  • Defect grading is step-less, QC pass standard is set on the computer screen by simply dragging a scroll bar.
  • Defect displaying is time real, including pictures, size, and position.
  • Defect recording millions of images can be stored for defective picture, position and size.
  • Light source to target, to lens, to camera, to image collector, to image processor, to signal output, to act and alarm (relay excited, valve energized, air ejector worked, and defects blown down).
  • Suitable computerized QC inspection stations are available from a number of professional manufacturers where the configuration of various grades is to be determined according to the quality requirements and economic investment.
  • the application of this invention could greatly improve quality, save manpower and space, at the same time, prevent check omission or mistakes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Description

AUTOMATIC ONLINE DEFECTIVE ELEMENTS-CHECKING-AND-RE OVING
DEVICE FOR FLEXOGRAPHIC PRINTING PRESSES
TECHNICAL FIELD
The invention of automatic online checking-and-removing device for defective printed elements and relates to flexographic printing presses currently used in printing industry, adding the function of automatic detection and ejection of defective printed elements such as labels. The invention could be classified into the constructional technology of printing equipment.
TECHNICAL BACKGROUND
Developing with today's advanced science and technology, the printing industry has entered digital age. However, many small and medium-sized printing workshops are still in a transitive stage between the primitive and the modern production process, with the inspection of printed products and defects ejection still stuck in the traditional stage of operators' visual check and manual removal, which needs lot of manpower and time, but still inspection mistakes occur frequently. New approaches are being explored to ensure product quality, reduce defective printed elements, improve efficiency and save manpower.
SUMMARY OF THE INVENTION
The purpose of this invention is to offer a more reliable and easily operated function for flexographic printing press, after being installed the automatic online defective elements removing device. It applies to the flexographic printing machine for labels after cutting or cutting the labels.
According to the invention there is provided, in a flexographic printing press, an automatic online defective elements checking and removing device comprising:
two stages of vacuum-conveying platform including a first vacuum- conveying platform and a second vacuum and separating-conveying platform;
both of the platforms being mounted on top of a mobile frame; each of the platforms being separately driven by a respective motor; a defective element remover located between the first vacuum conveying platform and the second vacuum and separating conveying platform;
a defective removing air ejector operated by a valve;
an online computerized visual QC station at the fiexographic printing press arranged such that detection of a defective element causes operation of the air ejector;
a vacuum pump and vacuum distribution tube on the mobile frame; and a valve to adjust the vacuum to the platforms in order to prevent the printed labels from moving on the conveyor belt.
Preferably there are four universal casters under the mobile frame. Preferably there are screw bolts for adjusting the height to stabilize the frame.
Preferably the second stage includes a plurality of belts for transporting the QC passed labels. Preferably a gap between belts widens from start to end, making gaps between lines of labels during transport on the belts, facilitating the process of collection, counting, packing and stacking.
A vacuum chamber is located beneath the first vacuum conveying platform and the second vacuum conveying platform which includes the separating- conveying flat belts.
The separating conveyer belt which may comprise one to three flat belts side by side on the second stage, transports at the same time the QC passed labels.
Preferably the vacuum pump and vacuum distribution tube are connected each other with steel wire reinforced hose.
Preferably a ball valve is used to adjust the vacuum in order to prevent the printed labels from moving on the conveyor belt.
In conclusion, this invention is to reduce defects and maximize quality products. The invention is to help operators find and handle defects in time, thus raise the Quality Control (QC) pass rate, save materials, manpower, space, time and financial investment.
BRIEF DESCRIPTION OF THE DRAWINGS
On embodiment of the invention will now be described in conjunction with the accompanying drawings in which:
Description of the attached figures
Figure 1 is a side elevational view of one embodiment of the invention.
Figure 2 is a top plan view of the embodiment of Figure 1 .
DETAILED DESCRIPTION
The reference numerals used in this specification are as follows:
1 , movable frame;
2, vacuum distributing tube;
3, air pump;
4, the vacuum and separating conveyor platform at the second stage;
5, defective elements ejector and collector;
6, the vacuum and transporting conveyor platform at the first stage;
7, defective elements removing air ejector;
8, synchronous toothed belt;
9, asynchronous motor at the first stage;
0, asynchronous motor at the first stage;
1 1 , universal castors;
12, screw bolt foot;
13, flat belt of the vacuum and separating conveyor platform at the second stage;
20, QC defect detector;
21 , schematic illustration of flexographic printing press.
Referring to Figure 1 , there is provided in a flexographic printing machine shown schematically at 21 an automatic online defective elements removing device which comprises two stages, that is, the first vacuum-conveying platform 6 and the second vacuum and separating-conveying platform 4, both on the top of a mobile frame 1 , separately driven by motors 9 and 10 via toothed belts. The defective elements collector 5 is located between the first vacuum conveying platform 6 and the second vacuum and separating conveying platform 4. The defective removing collection system includes the collector 5 which carries the labels downwardly into a collection container and an air ejector 7 which is operated by a valve in response to an output signal from an online computerized visual QC station 20 at the flexographic printing press 21 which acts to detect defective printed elements.
Under the mobile rack 1 is installed a vacuum pump 3 and vacuum distribution tube 2 connected to each other by steel wire reinforced hose. A ball valve is used to adjust the vacuum in the conveyors 4 and 6 in order to prevent the printed labels from moving from their positions on the conveyor belt.
The mobile frame at the bottom has four universal casters 1 1 for easy online and offline combination. There are provided screw bolts 12 for adjusting the height to stabilize the rack.
The second stage 4 includes between one and three flat belts 13 at transversely spaced positions arranged to transport at the same time QC passed labels. The gap between belts 13 widens from start to end, making gaps between the lines of labels during transport on the belts, facilitating the process of collection, counting, packing and stacking at the end of the conveyor stage 4.
The flexographic printing press equipped with the online automatic defective elements checking and removing device operates as follows.
A computerized inspection unit is installed at the flexographic printing press (not shown upstream of the first stage 6) and this checks on line the quality of the printed labels using conventional optical analysis thereof. Once a defective label is detected, the unit reports its position, outputs an alarm, and gives command to the air ejector 7, which afterwards blows the defective label down into the collector 5 which includes slots 5A and transfer duct 5B. QC passed labels go straight to the vacuum and separating conveyor belts 13, from which they are delivered to a delivery table for gap forming, collecting, counting and packing.
The invention may provide the following advantages.
By means of the two key points of online QC inspection and defective elements removal, the invention is to help operators find and handle the current and potential defects in time, thus raise the QC pass rate, save materials, manpower, space, time and money. The online inspection and defective element remover has proved more powerful than 10 to 5 workers by visual check and manual selection.
In one example of application to further illustrate the invention, the QC defective elements removing device is installed at a flexographic printing press. On the top of the movable frame 1 , there are the first stage vacuum transporting platform 6 and the second stage vacuum separating platform 4, driven via synchronous toothed belts by motor 9 and 10. Defective element removing device 5 is located between the first stage vacuum transporting platform 6 and the second stage vacuum separating platform 4. The defective ejecting air knife 7 is controlled by a magnetic valve which receives command from the computerized QC and visual inspection station installed at the flexographic printing press. Under the frame 1 , there are air pump 3, vacuum distribution tube 2, with steel wire enforced hose linked, and further to the vacuum chambers for the first stage vacuum transporting platform 6 and the second stage vacuum separating platform 4. A ball valve is used to adjust the vacuum to prevent labels from moving on the conveyors.
For the purpose of easy online or offline installation, four universal casters, 1 1 , are installed under the movable frame and four screw bolts are used to adjust height to stabilize the framework.
The flat belts 13 on the second stage vacuum separating platform transport 4 feed QC passed labels side by side to the delivery table for collecting, counting and packing.
Quality inspection of printed labels is performed by means of machine vision, that is computerized visualization or image analysis. Labels are scanned and digital image signals are attained via photo electric technology. The image is transmitted to a professional image processor where its features like pixel, brightness, color are analyzed and appraised. Action is taken according to the judgment. This computerized visual quality inspection has the advantage of non- contact, high speed, and vast storage of information. It gets smaller but more intelligent with the development of computer technology.
Defect detection includes omission, dirty dots, broken words, white dots, mis-registration, etc.
Defect grading is step-less, QC pass standard is set on the computer screen by simply dragging a scroll bar.
Defect displaying is time real, including pictures, size, and position.
Defect recording: millions of images can be stored for defective picture, position and size.
Hereunder briefly describe working principle of typical machine visual inspection and defect elimination device.
Light source to target, to lens, to camera, to image collector, to image processor, to signal output, to act and alarm (relay excited, valve energized, air ejector worked, and defects blown down).
Suitable computerized QC inspection stations are available from a number of professional manufacturers where the configuration of various grades is to be determined according to the quality requirements and economic investment.
The application of this invention could greatly improve quality, save manpower and space, at the same time, prevent check omission or mistakes.

Claims

1. In a flexographic printing presses an automatic online defective elements checking and removing device comprising:
two stages of vacuum-conveying platform including a first vacuum- conveying platform and a second vacuum and separating-conveying platform;
both of the platforms being mounted on top of a mobile frame;
each of the platforms being separately driven by a respective motor; a defective element remover located between the first vacuum conveying platform and the second vacuum and separating conveying platform;
a defective removing air ejector operated by a valve;
an online computerized visual QC station at the flexographic printing press arranged such that detection of a defective element causes operation of the air ejector;
a vacuum pump and vacuum distribution tube on the mobile frame; and a valve to adjust the vacuum to the platforms in order to prevent the printed labels from moving on the conveyor belt.
2. The device according to claim 1 wherein there are four universal casters under the mobile frame.
3. The device according to claim 1 wherein there are screw bolts for adjusting the height to stabilize the frame.
4. The device according to claim 1 wherein the second stage includes a plurality of belts for transporting the QC passed labels.
5. The device according to claim 4 wherein a gap between belts widens from start to end, making gaps between lines of labels during transport on the belts, facilitating the process of collection, counting, packing and stacking.
6. The device according to claim 1 wherein the vacuum pump and vacuum distribution tube are connected each other with steel wire reinforced hose.
7. The device according to claim 1 wherein a ball valve is used to adjust the vacuum in order to prevent the printed labels from moving on conveyor belt.
PCT/CA2012/050863 2012-01-18 2012-11-29 Automatic online defective elements-checking-and-removing device for flexographic printing presses Ceased WO2013106904A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2012100147030A CN102615053A (en) 2012-01-18 2012-01-18 Flexible printing machine added with quality inspection substandard-product rejecting device
CN201210014703.0 2012-01-18

Publications (1)

Publication Number Publication Date
WO2013106904A1 true WO2013106904A1 (en) 2013-07-25

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PCT/CA2012/050863 Ceased WO2013106904A1 (en) 2012-01-18 2012-11-29 Automatic online defective elements-checking-and-removing device for flexographic printing presses

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CN (1) CN102615053A (en)
WO (1) WO2013106904A1 (en)

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CN102922873B (en) * 2012-09-27 2015-04-08 江苏科思机电工程有限公司 Online waste rejection and automatic sampling inspection device of printed matters
CN103862852B (en) * 2012-12-13 2016-09-14 谷永辉 A kind of gripper for printing machine row's break-in experimental provision and paper-transferring gripper break-in method
CN105436094A (en) * 2014-08-26 2016-03-30 烟台市亨利不干胶印刷有限公司 Movable tag sorting machine
CN104326301B (en) * 2014-08-28 2017-02-08 北京凌云光技术有限责任公司 Defective tag automatic removing device and system using automatic removing device
CN104741324A (en) * 2015-04-13 2015-07-01 山东信川机械有限责任公司 Single corrugated paperboard quality detecting machine
CN108031659A (en) * 2017-12-26 2018-05-15 天津成理能顺科技有限公司 A kind of multifunctional trademark qualification detection device
CN112767306B (en) * 2020-12-24 2024-09-06 凌云光技术股份有限公司 Printing quality detection and receiving method and system

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EP1069059A2 (en) * 1999-07-12 2001-01-17 Riso Kagaku Corporation Sheet carrying device
US6422377B1 (en) * 1999-09-06 2002-07-23 Nsm Magnettechnik Gmbh & Co. Kg Belt conveyor device for the suspended transport in particular, by means of vacuum, of goods to be conveyed
JP2006061767A (en) * 2004-08-25 2006-03-09 Yamato Scale Co Ltd Sorting device

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Publication number Priority date Publication date Assignee Title
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DE102017202922B4 (en) 2017-02-23 2019-10-10 Koenig & Bauer Ag Suction belt table of a sheet feeder with at least one suction belt

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