US20060254367A1 - Measurement system for improved paper roll runnability - Google Patents

Measurement system for improved paper roll runnability Download PDF

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Publication number
US20060254367A1
US20060254367A1 US11/127,633 US12763305A US2006254367A1 US 20060254367 A1 US20060254367 A1 US 20060254367A1 US 12763305 A US12763305 A US 12763305A US 2006254367 A1 US2006254367 A1 US 2006254367A1
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United States
Prior art keywords
moving web
tension
caliper
sensor
web
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.)
Abandoned
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US11/127,633
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English (en)
Inventor
Ake Hellstrom
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.)
ABB Ltd
Original Assignee
ABB Ltd
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 ABB Ltd filed Critical ABB Ltd
Priority to US11/127,633 priority Critical patent/US20060254367A1/en
Assigned to ABB LTD. reassignment ABB LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HELLSTROM, AKE
Priority to EP06759735.1A priority patent/EP1888839B1/fr
Priority to PCT/US2006/018531 priority patent/WO2006124665A2/fr
Priority to CA2602754A priority patent/CA2602754C/fr
Publication of US20060254367A1 publication Critical patent/US20060254367A1/en
Priority to US11/964,121 priority patent/US7780817B2/en
Abandoned legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems
    • D21G9/0036—Paper-making control systems controlling the press or drying section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses
    • B65H2515/31—Tensile forces
    • B65H2515/314—Tension profile, i.e. distribution of tension, e.g. across the material feeding direction or along diameter of web roll

Definitions

  • This invention relates to paper rolls and more particularly to the runnability of a paper roll.
  • Paper products are typically shipped in large rolls from the paper mill to a converting or printing facility.
  • the paper quality can be characterized by sheet properties, for instance thickness, basis weight, moisture content or strength, but there are additional mechanical properties of the paper roll as an entity that are equally important for the user. These additional mechanical properties are often referred to as “roll runnability”, designating how well the roll unwinds and pulls though the process, and the flatness and uniformity of the resulting web. For instance, if there is a local tension variability in the roll, the resulting web may become locally wrinkled or tend to pull diagonally instead of straight, or even break at localized high tension areas.
  • Rolls from different paper machines or made at different times or locations of a machine may have different runnability characteristics. For example, some rolls may tend to pull diagonally left and other rolls may tend to pull right.
  • the converting or printing machinery may in some cases be adjusted to partially correct for a particular runnability condition, but that machinery cannot economically be re-adjusted between rolls.
  • On-line paper reel hardness sensors were on the market in the 1970's. This included the “Back Tender's Friend”, utilizing a design originated by Consolidated-Bathurst, Inc., and built by a few gauging suppliers including AccuRay Corporation, now part of ABB, and similar solutions that mechanically inspect the reel as it is being built.
  • These reel mechanical inspection solutions measure the local roll hardness by the force impulse generated by a contacting and traversing small roller sensing device in contact with the roll periphery including piezoelectric signal transducers that can estimate the hardness profile.
  • These reel mechanical inspection solutions add cost and complexity to the papermaking process.
  • the total web tension is today easily measured via motor torque or via load cells on lead rolls for the paper web. This information can be used to control the roll building process for proper nominal tension.
  • the tension has a cross directional profile.
  • Portions of the web may be slack and other portions may have high tension streaks. If the tension is not uniform across the web, the sheet will not wind in a proper cylindrical shape and the non-uniform tension will cause ridges, wrinkles and hard versus soft areas in the paper roll.
  • the reasons for an uneven web tension profile includes a CD dependent fiber orientation, pressing, drying and rewetting of the paper. Cross machine moisture control to level the moisture profile at the reel may not always help and in some cases worsen the tension profile by shrinking or expanding the sheet dimensions.
  • a stand-alone web tension profile sensor can be produced by installing a stationary beam where the sheet wraps around stationary sensing devices, for instance an array of air orifices. This is described in U.S. Pat. No. 5,052,233. Drawbacks of these devices include high cost, extra space needed in the paper machine, and impairing threading of the paper. Additionally, the signal handling to combine tension and caliper information for a roll quality estimate becomes complex.
  • the present invention shares this caliper sensor hardware for reel tension measurement and merges the caliper and tension information into a prediction of roll hardness uniformity.
  • a method for measuring in a direction across a moving web both tension and caliper of the moving web comprising:
  • controlling the single sensor to alternate between two operating modes where in one of the two operating modes the single sensor measures caliper of the moving web and in another of the two operating modes the single sensor measures tension of the moving web.
  • a single sensor for measuring in a direction across a moving web both tension and caliper of the moving web at a location on the moving web comprising:
  • a method for measuring in a direction across a moving web both tension and caliper of the moving web comprising:
  • a system for measuring at a location on a moving web both caliper and tension of the moving web comprising:
  • At least one guide associated with the sensor for measuring tension of the moving web to support the moving web during the tension measurement.
  • a scanning frame having an opening through which a moving web passes
  • a sensor mounted in the scanning frame for measuring at locations across the moving web both tension and caliper of the moving web, the scanning frame operable to cause the sensor to move back and forth across the moving web;
  • a web making machine comprising:
  • a sensor mounted in the scanning frame for measuring at locations across the moving web both tension and caliper of the moving web, the scanning frame operable to cause the sensor to move back and forth across the moving web;
  • FIG. 1 shows a schematic view of winding a reel from a web material.
  • FIG. 2 shows a conventional paper making machine including the caliper and tension measuring system of the present invention.
  • FIG. 3 shows a prior art caliper sensor.
  • FIG. 4 shows the prior art caliper sensor and air supply modified in accordance with the present invention.
  • FIG. 5 shows the sensor of FIG. 4 activated to measure web tension.
  • FIG. 6 shows another embodiment for the caliper and tension measuring system of the present invention.
  • FIG. 7 shows a further embodiment for the caliper and tension measuring system of the present invention.
  • FIG. 8 shows the fundamental tension measuring geometry
  • FIG. 9 shows a graph of tension versus vertical deflection.
  • FIG. 10 shows a graph of force versus paper thickness.
  • the qualities of a wound paper roll 16 are significantly influenced by the web CD caliper profile, the CD tension profile, and well as the overall tension level in the MD.
  • An un-even caliper CD profile causes layers of paper to contact at high thickness CD locations and to have loose contact or air gaps at low thickness locations.
  • the errors accumulate due to a very large number of wraps in a large diameter paper roll. The accumulated errors may result in a non cylindrical shape and localized hard and soft areas on the roll.
  • the effect of uneven thickness profile is often worse on thin paper grades where the number of wraps become large. For instance, a full newsprint reel in a paper machine may have 15,000 wraps of paper.
  • the other important factor for roll building is the web tension.
  • This has two components—the tension CD profile and the overall MD tension.
  • the CD profile may be caused by un-even drying or re-moisturizing of the paper web in the CD direction, un-even fiber orientation from the wet end, and related shrinkage effects.
  • overall MD tension can be managed by motor drive controls 18 which includes controller 18 a and drive motor 18 b .
  • the CD profile superimposes localized high tension or low tension areas of the paper winding process.
  • the tension profile may cause hard spots or soft spots on the reel, or tendency to skew the web, web overstressing and even failure at high tension areas.
  • FIG. 2 which is FIG. 1 of the '720 patent, shows a conventional paper making machine 10 having final calendering rolls 11 and associated cross machine control actuators 11 a .
  • a caliper and tension measuring system 5 constructed in accordance with the present invention is preferably positioned downstream from the final calendering rolls 11 and is advantageously used to monitor the thickness and tension of a moving sheet of paper 12 after the final calendering operation.
  • the caliper and tension measuring system 5 includes a scanning station 20 .
  • the moving sheet of paper 12 can be seen passing through the scanning station 20 between upper and lower transverse beams 22 and 24 on which are mounted upper and lower sensing heads 30 and 50 .
  • the sensing heads 30 and 50 are driven back and forth across the width of the paper 12 in a continuous scanning motion, keeping them in substantial alignment at all times.
  • the signals from the sensing heads 30 and 50 and the scanning station 20 are communicated to processing computer 23 that provides operator display and process control. Signals from computer 100 are sent to actuators 11 a to control the thickness of paper 12 .
  • Computer 100 and associated actuators 11 a , sensing heads 30 , 50 and scanner 12 are known as a quality control system.
  • a standard caliper sensor 60 In order to provide a cost effective, simple and reliable means of measuring web tension as well as caliper, a standard caliper sensor 60 , known from the prior art and shown in FIG. 3 , can in accordance with the present invention be provided with the additional features described herein to measure web tension.
  • Sensor 60 measures web thickness by means of a pair of sensing planes 62 a , 62 b contacting the web or sheet 12 from both sides, and includes a magnetic based measurement of the distance for the sensing planes 62 a , 62 b in order to provide the web thickness.
  • Sensor 60 is mounted in a scanner (not shown in FIG. 3 but well known to those of ordinary skill in the art such as scanning station 20 shown in FIG. 2 herein) that permits travel across the web 12 to measure a cross direction (CD) thickness profile of the web 12 .
  • a scanner not shown in FIG. 3 but well known to those of ordinary skill in the art such as scanning station 20 shown in FIG. 2 herein
  • CD cross direction
  • appropriate sensor electronics 63 and a computer 100 are added to convert magnetic sensing element signals and accurately display process thickness units. Such a scheme is described for instance in the '720 patent.
  • FIG. 4 shows the prior art caliper sensor 60 with associated air supply 66 , 68 for the top and bottom caliper measurement, respectively.
  • Valves 66 a , 68 a and pressure regulators 66 b , 68 b allow for extension and retraction of the sensing planes 62 a , 62 b so that sensor 60 can measure the caliper of web 12 .
  • Not shown in this illustration are retraction springs or other devices that pull the sensing planes 62 a , 62 b away from the sheet.
  • the air supply systems 66 , 68 include additional features for alternate pressure selection for at least one of the sensing planes.
  • the alternate pressure setting is utilized for tension measurement and is provided by the combination of valve 66 c and pressure regulator 66 d.
  • FIG. 4 also shows sheet guides 70 , 72 before and after the caliper and tension measurement.
  • These guiding devices 70 , 72 can be distant from or near the caliper measurement and may consist of rollers, sliding contact bars, or non contacting air bearings.
  • FIG. 5 shows the sensor 60 of FIG. 4 in a state where the alternate pressure settings are activated to allow web tension measurement.
  • the lower sensing plane 62 b is de-activated and retracted in the sensor.
  • the upper sensing plane 62 a is activated with an alternate pressure setting to permit a light touch deflection of the web 12 .
  • the pressure in upper half of sensor 20 is chosen to introduce a measuring gap 74 between upper and lower sensing planes 62 a , 62 b that is significantly larger than the web thickness, but yet introduces a measurable deflection of the web 12 .
  • the web thickness on fine writing paper may be 0.1 mm, while the gap between the sensing elements that measure paper deflection is of the magnitude of 4 mm.
  • the measuring gap 74 between the sensing planes 62 a , 62 b should be at least 10 times the thickness of the web 12 .
  • the measuring gap 74 between the sensing planes 62 a , 62 b is indicative of the sum of caliper and web tension effects. This distance is measured by the same devices that measure caliper. If the thickness of the sheet 12 is very small compared to the gap distance for sensing tension, caliper may be neglected. For caliper values that are larger, the most recent caliper profile may be subtracted from the tension measurement.
  • control commands from a computer are used to activate the sensing pressures to, at user selectable intervals, alternate between caliper and web tension measurement mode.
  • the caliper profile may be measured during 20 scans across the web 12 , followed by a measurement of the web tension profile for one scan, with this alternating measurement continuously repeated.
  • the web tension CD profile is believed to have less dynamic variability than the caliper CD profile, and thus it may not need to be updated at a very high rate.
  • user demand can also be used to issue control commands that activate the sensing pressures to alternate between caliper and web tension measurement mode.
  • FIG. 6 shows an alternate method and apparatus for providing a computer selectable caliper and tension sensor air pressure.
  • a continuously adjustable sensing pressure for each sensing plane is generated by proportional valves 80 a , 80 b under control of an associated signal 84 a , 84 b from a computer (not shown here but typically the same as the computer 100 shown in FIGS. 2 and 3 ), and with an associated feedback signal 82 a , 82 b for closed loop pressure control.
  • This method and apparatus has less parts than the air supplies 66 , 68 shown in FIGS. 4 and 5 and allows for a wide range of pressure settings that may be useful for paper processes with a wide range of product thickness.
  • two identical or similar measurement devices 90 a , 90 b may be installed in tandem to separately measure caliper at device 90 b and tension at device 90 a as illustrated in FIG. 7 . While not shown in FIG. 7 , those of ordinary skill in the art would understand that there are air supplies associated with the upper and lower sensing planes of sensor 90 b to simultaneously extend both of those planes to measure caliper of the moving web 12 and an air supply associated only with one of the two sensing planes of sensor 90 a to extend that plane to measure the tension of the moving web 12 without pinching the web.
  • the air supply associated with one sensing plane of sensor 90 a would be as shown in either FIG. 5 or 6 and measurement device 90 a includes as is shown in FIG. 7 the sheet guides 70 , 72 .
  • This tandem arrangement enables a non-interrupted measurement of both caliper and tension but it adds cost and requires more room in the paper machine.
  • the fundamental tension measurement geometry is illustrated in FIG. 8 .
  • sheet 12 is thin, that is, printing grade paper such as for example newsprint and fine writing paper
  • the vertical deflection z is much larger than sheet thickness t
  • the bending resistance from sheet stiffness is much smaller than the deflection resistance from web tension T.
  • the applied force F(z) is constant and does not depend on z.
  • the assumption of a constant force for small deflections is reasonably well met with typical designs of the bellows or diaphragms activating sensing planes in a caliper sensor, however a more complex model that includes a non constant force vs. deflection of the bellows or diaphragms may be added for additional refinements.
  • the force is deflection independent.
  • FIG. 10 The influence of sheet bending stiffness is illustrated in FIG. 10 .
  • This data was experimentally generated by applying a force on a paper sample with the same configuration as in FIG. 9 .
  • One primary data point was measured by the change in sag on an end supported 200 ⁇ m thick paper at 300 ⁇ 300 mm size for a load F(z) using a small weight.
  • the bending resistance term may be neglected.
  • One extreme case of distance extension for very thick products includes elimination of one or both sheet guides 70 or 72 and only utilizing the paper machinery rolls for web support on one or both sides of the sensor.
  • Calibration of this sensor can be easily checked by placing a desired dimension sample strip through the sensor gap and pulling it by a constant force by using weights that pull one end of the sample hanging outside the sensor guide roll, and alternately measure caliper and web tension.
  • a target profile may be generated for a suitable profile shape including edge effects.
  • the combination of caliper and tension information across the web 12 may be utilized for improved characterization of roll quality. This information can also be applied for improved automatic controls using existing web profile actuators. Additionally, the invention can be connected to communicate with a paper machine drive system, such as for example, controller 18 a and drive motor 18 b of FIG. 1 , or winder machine for improved tension characterization and control to build more uniform paper rolls.
  • a paper machine drive system such as for example, controller 18 a and drive motor 18 b of FIG. 1 , or winder machine for improved tension characterization and control to build more uniform paper rolls.
  • the invention may also utilize air bearing based non contacting caliper sensors. Furthermore, the invention is applicable to any web thin material including coated products or extruded plastics sheets.

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  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Paper (AREA)
US11/127,633 2005-05-12 2005-05-12 Measurement system for improved paper roll runnability Abandoned US20060254367A1 (en)

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Application Number Priority Date Filing Date Title
US11/127,633 US20060254367A1 (en) 2005-05-12 2005-05-12 Measurement system for improved paper roll runnability
EP06759735.1A EP1888839B1 (fr) 2005-05-12 2006-05-12 Systeme de mesure permettant d'ameliorer l' enroulement d'un rouleau de papier
PCT/US2006/018531 WO2006124665A2 (fr) 2005-05-12 2006-05-12 Systeme de mesure permettant d'ameliorer le comportement d'un rouleau de papier
CA2602754A CA2602754C (fr) 2005-05-12 2006-05-12 Systeme de mesure permettant d'ameliorer le comportement d'un rouleau de papier
US11/964,121 US7780817B2 (en) 2005-05-12 2007-12-26 Measurement system for improved paper roll runnability

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WO2009101251A2 (fr) * 2008-02-12 2009-08-20 Upm-Kymmene Oyj Procédé et dispositif pour mesurer la pression dans la pince et/ou le profil de pression dans la pince d'une unité d'impression d'une presse à imprimer
WO2009101253A1 (fr) * 2008-02-12 2009-08-20 Upm-Kymmene Oyj Procédé pour améliorer le comportement machine d'une presse à imprimer pendant le processus d'impression
WO2009151419A1 (fr) * 2008-06-12 2009-12-17 Metso Automation Inc. Procédé et appareil pour la construction de dévidoirs et aptitude au passage sur rouleaux lors de la fabrication d’une bande mobile
WO2014016132A1 (fr) * 2012-07-24 2014-01-30 Voith Patent Gmbh Cadre de traversée
US20140224034A1 (en) * 2013-02-14 2014-08-14 Appleton Paper Inc. Deflection indication gauge
US20140345397A1 (en) * 2013-05-22 2014-11-27 Honeywell Asca, Inc. Scanning sensor arrangement for paper machines or other systems
US20150292156A1 (en) * 2014-04-15 2015-10-15 Georgia-Pacific Consumer Products Lp Methods and apparatuses for controlling a manufacturing line used to convert a paper web into paper products by reading marks on the paper web
US20160054120A1 (en) * 2014-08-22 2016-02-25 Honeywell Asca Inc. Automated upper/lower head cross direction alignment based on measurement of sensor sensitivity
WO2016108843A1 (fr) * 2014-12-30 2016-07-07 Kimberly-Clark Worldwide, Inc. Système de mesure et de régulation d'épaisseur de bande
US9796274B2 (en) 2013-05-22 2017-10-24 Honeywell Limited Power delivery system for providing power to sensor head of paper machine or other system
CN108820990A (zh) * 2018-05-28 2018-11-16 金东纸业（江苏）股份有限公司 应用于纸张张力调整的方法以及系统
CN112161735A (zh) * 2020-10-26 2021-01-01 重庆宏劲印务有限责任公司 卷盘彩色框架纸缠绕张力智能检测装置
CN113566764A (zh) * 2021-07-20 2021-10-29 深圳市鸿辉烫金材料有限公司 一种烫金箔卷筒厚度检验设备

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US9481777B2 (en) 2012-03-30 2016-11-01 The Procter & Gamble Company Method of dewatering in a continuous high internal phase emulsion foam forming process
US9952160B2 (en) 2014-04-04 2018-04-24 Packaging Corporation Of America System and method for determining an impact of manufacturing processes on the caliper of a sheet material
US9816906B2 (en) * 2014-04-25 2017-11-14 Honeywell International Inc. Apparatus and method for stretch measurements of tissue webs
US9284686B1 (en) 2014-10-30 2016-03-15 The Procter & Gamble Company Process to improve the convertability of parent rolls

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Cited By (27)

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Publication number Priority date Publication date Assignee Title
WO2009101253A1 (fr) * 2008-02-12 2009-08-20 Upm-Kymmene Oyj Procédé pour améliorer le comportement machine d'une presse à imprimer pendant le processus d'impression
WO2009101251A3 (fr) * 2008-02-12 2009-12-03 Upm-Kymmene Oyj Procédé et dispositif pour mesurer la pression dans la pince et/ou le profil de pression dans la pince d'une unité d'impression d'une presse à imprimer
WO2009101251A2 (fr) * 2008-02-12 2009-08-20 Upm-Kymmene Oyj Procédé et dispositif pour mesurer la pression dans la pince et/ou le profil de pression dans la pince d'une unité d'impression d'une presse à imprimer
WO2009151419A1 (fr) * 2008-06-12 2009-12-17 Metso Automation Inc. Procédé et appareil pour la construction de dévidoirs et aptitude au passage sur rouleaux lors de la fabrication d’une bande mobile
US8489221B2 (en) 2008-06-12 2013-07-16 Metso Automation Inc. Method and apparatus for reel building and roll runnability in moving web manufacturing
WO2014016132A1 (fr) * 2012-07-24 2014-01-30 Voith Patent Gmbh Cadre de traversée
US20140224034A1 (en) * 2013-02-14 2014-08-14 Appleton Paper Inc. Deflection indication gauge
US9097620B2 (en) * 2013-02-14 2015-08-04 Appvion, Inc. Deflection indication gauge
US9354090B2 (en) * 2013-05-22 2016-05-31 Honeywell Limited Scanning sensor arrangement for paper machines or other systems
US20140345397A1 (en) * 2013-05-22 2014-11-27 Honeywell Asca, Inc. Scanning sensor arrangement for paper machines or other systems
US9796274B2 (en) 2013-05-22 2017-10-24 Honeywell Limited Power delivery system for providing power to sensor head of paper machine or other system
US9963827B2 (en) 2014-04-15 2018-05-08 Gpcp Ip Holdings Llc Methods and apparatuses for controlling a manufacturing line used to convert a paper web into paper products by reading marks on the paper web
US10214857B2 (en) 2014-04-15 2019-02-26 Gpcp Ip Holdings Llc Methods of controlling a converting line that produces paper products
US9518362B2 (en) * 2014-04-15 2016-12-13 Georgia-Pacific Consumer Products Lp Methods and apparatuses for controlling a manufacturing line used to convert a paper web into paper products by reading marks on the paper web
US9771686B2 (en) * 2014-04-15 2017-09-26 Georgia-Pacific Consumer Products Lp Methods of controlling a manufacturing line used to produce paper products by reading marks on a paper web
US10760214B2 (en) 2014-04-15 2020-09-01 Gpcp Ip Holdings Llc Methods of converting a paper web into paper products by reading marks on the paper web
US9845574B2 (en) 2014-04-15 2017-12-19 Gpcp Ip Holdings Llc Method of marking a paper web for controlling a manufacturing line used to convert the paper web into paper products by reading marks on the paper web
US9951472B2 (en) 2014-04-15 2018-04-24 Gpcp Ip Holdings Llc Methods and apparatuses for controlling a manufacturing line used to convert a paper web into paper products by reading marks on the paper web
US20150292156A1 (en) * 2014-04-15 2015-10-15 Georgia-Pacific Consumer Products Lp Methods and apparatuses for controlling a manufacturing line used to convert a paper web into paper products by reading marks on the paper web
US10119225B2 (en) 2014-04-15 2018-11-06 Gpcp Ip Holdings Llc Systems for controlling a manufacturing line used to convert a paper web into paper products by reading marks on the paper web
US10435840B2 (en) 2014-04-15 2019-10-08 Gpcp Ip Holdings Llc Method of controlling a converting line used to convert a paper web into paper products by reading marks on the paper web
US10435839B2 (en) 2014-04-15 2019-10-08 Gpcp Ip Holdings Llc Paper web having a surface that includes a plurality of sections, at least one of the sections having a plurality of positions, with ink applied to the paper web surface at some of the plurality of positions
US20160054120A1 (en) * 2014-08-22 2016-02-25 Honeywell Asca Inc. Automated upper/lower head cross direction alignment based on measurement of sensor sensitivity
WO2016108843A1 (fr) * 2014-12-30 2016-07-07 Kimberly-Clark Worldwide, Inc. Système de mesure et de régulation d'épaisseur de bande
CN108820990A (zh) * 2018-05-28 2018-11-16 金东纸业（江苏）股份有限公司 应用于纸张张力调整的方法以及系统
CN112161735A (zh) * 2020-10-26 2021-01-01 重庆宏劲印务有限责任公司 卷盘彩色框架纸缠绕张力智能检测装置
CN113566764A (zh) * 2021-07-20 2021-10-29 深圳市鸿辉烫金材料有限公司 一种烫金箔卷筒厚度检验设备

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CA2602754A1 (fr) 2006-11-23
US7780817B2 (en) 2010-08-24
WO2006124665A2 (fr) 2006-11-23
US20080210396A1 (en) 2008-09-04
WO2006124665A3 (fr) 2007-03-08

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