CA1280680C - Detection and control of stretch in film material - Google Patents
Detection and control of stretch in film materialInfo
- Publication number
- CA1280680C CA1280680C CA000498593A CA498593A CA1280680C CA 1280680 C CA1280680 C CA 1280680C CA 000498593 A CA000498593 A CA 000498593A CA 498593 A CA498593 A CA 498593A CA 1280680 C CA1280680 C CA 1280680C
- Authority
- CA
- Canada
- Prior art keywords
- web
- stretch
- unwind
- scanning
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/182—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations
- B65H23/1825—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations and controlling web tension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
Abstract
DETECTION AND CONTROL OF STRETCH IN FILM
MATERIAL
ABSTRACT OF THE DISCLOSURE
A device for measuring and controlling the stretch in a web of film material to correspond to the predetermined stretch in a second web of material with both webs being fed to laminating rolls comprising a supply roll for said first material, feed rolls for pulling said first web of material from said supply roll, an endless belt for supplying an initial tension on said first web and operated by a motor. A dancer arm loaded by a pneumatic con-trolled piston to increase or decrease the tension on the first web of material, a photo electric scanner for measuring the width or thickness of said first web of material to provide an input to said pneumatically operated piston and a sensor and computer for measuring the position of the dancer arm to provide a signal to said motor to adjust initial tension on said first web so that said first web will be stretched an amount similar to that on the second web of material.
MATERIAL
ABSTRACT OF THE DISCLOSURE
A device for measuring and controlling the stretch in a web of film material to correspond to the predetermined stretch in a second web of material with both webs being fed to laminating rolls comprising a supply roll for said first material, feed rolls for pulling said first web of material from said supply roll, an endless belt for supplying an initial tension on said first web and operated by a motor. A dancer arm loaded by a pneumatic con-trolled piston to increase or decrease the tension on the first web of material, a photo electric scanner for measuring the width or thickness of said first web of material to provide an input to said pneumatically operated piston and a sensor and computer for measuring the position of the dancer arm to provide a signal to said motor to adjust initial tension on said first web so that said first web will be stretched an amount similar to that on the second web of material.
Description
~306l3~ 1 BACKGROUND OF THE INVENTION
FIELD OF TH~_INVENTION
This invention relates to a device for assuring better lamination of film material. When webs of film material are fed to laminating rolls without the use of the present inven-tion, they generally have different amounts of stretch thereon.
Thus, when the laminated material relaxes, it may result in too much curl or warping. The present invention uses the concept that the width or thickness of the web is proportionately re-lated to the amount of stretch thereon and, therefore, a vhoto-electric scanner is used for measuring the width of the web and imparting a signal to a pneumatically controlled dancer arm.
DESCRIPTION OF THE PRIOR ART
Photoelectric sensing devices are shown in United States Patent No. 2,088,984 to Tandel. The position of the web is measured rather than the thickness thereof.
In the past, load cells and dancer arms have been used to control the tension on a web being fed as disclosed in United States Patent No. 2,753,128, as well as in Japanese Patent ¦
No. 44-12163 and British Patent No. 1,371,760.
The United States Patent Mo. 2,627,296 to Secrest discloses an apparatus includ means for adjusting the tension in ~1 a web of fabric.
FIELD OF TH~_INVENTION
This invention relates to a device for assuring better lamination of film material. When webs of film material are fed to laminating rolls without the use of the present inven-tion, they generally have different amounts of stretch thereon.
Thus, when the laminated material relaxes, it may result in too much curl or warping. The present invention uses the concept that the width or thickness of the web is proportionately re-lated to the amount of stretch thereon and, therefore, a vhoto-electric scanner is used for measuring the width of the web and imparting a signal to a pneumatically controlled dancer arm.
DESCRIPTION OF THE PRIOR ART
Photoelectric sensing devices are shown in United States Patent No. 2,088,984 to Tandel. The position of the web is measured rather than the thickness thereof.
In the past, load cells and dancer arms have been used to control the tension on a web being fed as disclosed in United States Patent No. 2,753,128, as well as in Japanese Patent ¦
No. 44-12163 and British Patent No. 1,371,760.
The United States Patent Mo. 2,627,296 to Secrest discloses an apparatus includ means for adjusting the tension in ~1 a web of fabric.
~ao6ao In United States Patent No. 3,239,161 to Dutro et al there is disclosed a drive control mechanism which dispenses an elongated web of material with the spped and tension thereof being adjustable.
United States Patent No. 3,510,374 to ~alker discloses a control apparatus for sensing a property of a moving web and adjusting the moving web so that the desired property is uniform throughout the web.
In United States Patent No. 3,107,679 to Pawlowski, there is disclosed an automatic tension control device which utilizes either pneumatic or electrical circuitry to maintain the tension in a web of material substantially constant.
The United States Patent No. 3,762,125 to Prena dis- I
closes a device for controlling the lamination of one material onto another material which utilizes a photocell 50, which is responsive to indicia 48 on the film "F" which sends the infor- ¦
mation to a control box 34 of a clu,tch 39, which controls the stretch rolls 38a and 38b to thereby keep the two webs lined up with one another.
United States Patent No. 4,347,993 to Leonard dis-closes a tension monitoring and controlling means which includes a controller responsive to outputs of the tension sensing trans-ducer thereof a reference tension selector for controlling ~j torque applied to the tension control roll to thereby control ¦ the web tension.
Il ~
lZ1~ 8~
The present invention has for its concept the use of a photo-electric scanner for scanning the width or thickness of a web of material to provide an input into a pneumatic actuator for a dancer arm to adjust the tension on a web of film material. The position of the dancer arm is in turn sensed by a sensor and computer which provides a signal to a motor operating an endless belt engaqing the web of material to resist pulling of the web from a supply roll. Thus, the stretch in the web of film material can be equalized with that of the predetermined stretch in another web of film material when both are fed to laminating webs so that there will be no warping of the laminated product.
The present invention therefore provides a device for testinq and adjusting the amount of stretch in a first web of material for corresponding the amount of stretch in said first material to that of the predetermined stretch in a second web of material comprising a pair of laminating rolls, feed means for feeding said first and second webs of material to said laminating rolls, a supply roll for said first material, unwind means for applying an initial tension on said first web of material, scanning means for scanning the width of said first web of material, a dancer arm having an idler roll about which said first web is entrained, control means for loading said clancer arm upon signal from said scanning means, and sensor and computing means connected to said control means and said unwind means for applying initial tension on said first web of material and said control means to adjust the tension on said first web of material so that lX80680 said material has a stretch equal to the predetermined stretch on said second web of material.
This invention also provides a device for testing and adjusting the amount of stretch in a first web of material for corresponding the amount of stretch in said first material to that of the predetermined stretch in a second web of material comprising a pair of laminating rolls, feed means for feeding said first and second webs of material to said laminating rolls, a supply roll for said first material, unwind means for applying an initial tension on said first web of material, scanning means for scanning the width of said first web of material, a dancer arm having an idler roll about which said first web is entrained, a pneumatic cylinder having a piston therein, said piston being connected to said dancer arm, compressor means actuated by said scanning means for actuating said piston to load said dancer arm, and sensor and computing means connected to said control means and said unwind means for applying intitial tension on said first web of material to vary said unwind means and said control means to adjust the tension on said first web of material so that said material has a stretch equal to the predetermined stretch on said second web of material.
By way of illustration but not limitation, an embodiment of this invention will be hereinafter described, with reference to the drawing, in which the Figure is a schematic diagram of an embodiment of this device for adjusting the stretch in a web of film material.
- 4a -~Z80680 DETAILED DESCRIPTION OF TH~ INVE~TION
With continuing reference to the accompanying drawing, there are provided a pair of laminating rolls 10 and 12 between which two webs 14 and 16 of film material are drawn for lamina-tion thereof.
The amount of stretch on the material 16 is predeter-mined by measurement or other means. The device according to the present invention is for equalizing the stretch in material 14 with the stretch in the material 16 utilizing the fact that the amount of stretch will be proportionate to the width of the film material 14.
The material 14 is drawn from a supply roll 18 by driven feed rolls or by the laminating roll nip. Initially, the tension on material 14 is controlled by a dancer arm 32 loaded by a pneumat:ic controlled piston 46. The speed of the endless belt 26 driven by motor 28 is used to maintain the dancer arm in an operating range.
The material 14 is passed by roll 20 and then passes about an idler roll 30 on a dancer arm 32 pivotally mounted as atl j~ 34. The material 14 is then passed by rolls 22 and 24 and pulled by the laminating rolls 10 and 12.
A photoelectric scanner 40, including a photo-elec- !
tric cell and signalling means, is positioned to measure the width of the material 14 after passing about the idler roll 30 and is electrically operatively connected to a pneumatic actuator 42, including a pr~ssure regulat ~4 aonneated to an air or pneu~ati~
~2ao680 cylinder 46 for controlling the force of a piston 48. Thus, the signal from the scanner 40 determines the load on the dancer arm and hence the tension on the material 14 and the amount of stretch thereof.
There is a rotational sensor or potentiometer 50 for providing an electrical signal based on the rotational position of the dancer arm so as to provide a signal to a computer 52 or micro-processor associated with the motor 28.
Thus, the speed of the endless belt 26 is controlled by motor 28 dependent on the signal from the rotational poten-tiometer 56 to control initial stretch on material 14 so that the 'I ~
stretch on the material 14 will be the same as the stretch on i, material 16 being fed to laminating rolls 10 and 12.
., I
ii I
United States Patent No. 3,510,374 to ~alker discloses a control apparatus for sensing a property of a moving web and adjusting the moving web so that the desired property is uniform throughout the web.
In United States Patent No. 3,107,679 to Pawlowski, there is disclosed an automatic tension control device which utilizes either pneumatic or electrical circuitry to maintain the tension in a web of material substantially constant.
The United States Patent No. 3,762,125 to Prena dis- I
closes a device for controlling the lamination of one material onto another material which utilizes a photocell 50, which is responsive to indicia 48 on the film "F" which sends the infor- ¦
mation to a control box 34 of a clu,tch 39, which controls the stretch rolls 38a and 38b to thereby keep the two webs lined up with one another.
United States Patent No. 4,347,993 to Leonard dis-closes a tension monitoring and controlling means which includes a controller responsive to outputs of the tension sensing trans-ducer thereof a reference tension selector for controlling ~j torque applied to the tension control roll to thereby control ¦ the web tension.
Il ~
lZ1~ 8~
The present invention has for its concept the use of a photo-electric scanner for scanning the width or thickness of a web of material to provide an input into a pneumatic actuator for a dancer arm to adjust the tension on a web of film material. The position of the dancer arm is in turn sensed by a sensor and computer which provides a signal to a motor operating an endless belt engaqing the web of material to resist pulling of the web from a supply roll. Thus, the stretch in the web of film material can be equalized with that of the predetermined stretch in another web of film material when both are fed to laminating webs so that there will be no warping of the laminated product.
The present invention therefore provides a device for testinq and adjusting the amount of stretch in a first web of material for corresponding the amount of stretch in said first material to that of the predetermined stretch in a second web of material comprising a pair of laminating rolls, feed means for feeding said first and second webs of material to said laminating rolls, a supply roll for said first material, unwind means for applying an initial tension on said first web of material, scanning means for scanning the width of said first web of material, a dancer arm having an idler roll about which said first web is entrained, control means for loading said clancer arm upon signal from said scanning means, and sensor and computing means connected to said control means and said unwind means for applying initial tension on said first web of material and said control means to adjust the tension on said first web of material so that lX80680 said material has a stretch equal to the predetermined stretch on said second web of material.
This invention also provides a device for testing and adjusting the amount of stretch in a first web of material for corresponding the amount of stretch in said first material to that of the predetermined stretch in a second web of material comprising a pair of laminating rolls, feed means for feeding said first and second webs of material to said laminating rolls, a supply roll for said first material, unwind means for applying an initial tension on said first web of material, scanning means for scanning the width of said first web of material, a dancer arm having an idler roll about which said first web is entrained, a pneumatic cylinder having a piston therein, said piston being connected to said dancer arm, compressor means actuated by said scanning means for actuating said piston to load said dancer arm, and sensor and computing means connected to said control means and said unwind means for applying intitial tension on said first web of material to vary said unwind means and said control means to adjust the tension on said first web of material so that said material has a stretch equal to the predetermined stretch on said second web of material.
By way of illustration but not limitation, an embodiment of this invention will be hereinafter described, with reference to the drawing, in which the Figure is a schematic diagram of an embodiment of this device for adjusting the stretch in a web of film material.
- 4a -~Z80680 DETAILED DESCRIPTION OF TH~ INVE~TION
With continuing reference to the accompanying drawing, there are provided a pair of laminating rolls 10 and 12 between which two webs 14 and 16 of film material are drawn for lamina-tion thereof.
The amount of stretch on the material 16 is predeter-mined by measurement or other means. The device according to the present invention is for equalizing the stretch in material 14 with the stretch in the material 16 utilizing the fact that the amount of stretch will be proportionate to the width of the film material 14.
The material 14 is drawn from a supply roll 18 by driven feed rolls or by the laminating roll nip. Initially, the tension on material 14 is controlled by a dancer arm 32 loaded by a pneumat:ic controlled piston 46. The speed of the endless belt 26 driven by motor 28 is used to maintain the dancer arm in an operating range.
The material 14 is passed by roll 20 and then passes about an idler roll 30 on a dancer arm 32 pivotally mounted as atl j~ 34. The material 14 is then passed by rolls 22 and 24 and pulled by the laminating rolls 10 and 12.
A photoelectric scanner 40, including a photo-elec- !
tric cell and signalling means, is positioned to measure the width of the material 14 after passing about the idler roll 30 and is electrically operatively connected to a pneumatic actuator 42, including a pr~ssure regulat ~4 aonneated to an air or pneu~ati~
~2ao680 cylinder 46 for controlling the force of a piston 48. Thus, the signal from the scanner 40 determines the load on the dancer arm and hence the tension on the material 14 and the amount of stretch thereof.
There is a rotational sensor or potentiometer 50 for providing an electrical signal based on the rotational position of the dancer arm so as to provide a signal to a computer 52 or micro-processor associated with the motor 28.
Thus, the speed of the endless belt 26 is controlled by motor 28 dependent on the signal from the rotational poten-tiometer 56 to control initial stretch on material 14 so that the 'I ~
stretch on the material 14 will be the same as the stretch on i, material 16 being fed to laminating rolls 10 and 12.
., I
ii I
Claims (11)
1. A device for testing and adjusting the amount of stretch in a first web of material for corresponding the amount of stretch in said first material to that of the predetermined stretch in a second web of material comprising a pair of famine-ting rolls, feed means for feeding said first and second webs of material to said laminating rolls, a supply roll for said first material, unwind means for applying an initial tension on said first web of material, scanning means for scanning the width of said first web of material, a dancer arm having an idler roll about which said first web is entrained, control means for load-ing said dancer arm upon signal from said scanning means, and sensor and computing means connected to said control means and said unwind means for applying initial tension on said first web of material and said control means to adjust the tension on said first web of material so that said material has a stretch equal to the predetermined stretch on said second web of material.
2. A device according to claim 1, wherein said scanning means includes a photo-electric cell.
3. A device according to claim 1, wherein said sensor and computing means includes a potentiometer operatively electrically connected to said unwind means.
4. A device according to claim 1, wherein said un-wind means includes an endless belt engaging said first web of material and a motor for driving said endless belt.
5. A device according to claim 1, wherein said un-wind means includes an endless belt engaging said first web of material and a motor for driving said endless belt, said sensor and computing means including a potentiometer connected to said motor speed control.
6. A device for testing and adjusting the amount of stretch in a first web of material for corresponding the amount of stretch in said first material to that of the predetermined stretch in a second web of material comprising a pair of lamina-ting rolls, feed means for feeding said first and second webs of material to said laminating rolls, a supply roll for said first material, unwind means for applying an initial tension on said first web of material, scanning means for scanning the width of said first web of material, a dancer arm having an idler roll about which said first web is entrained, a pneumatic cylinder having a piston therein, said piston being connected to said dancer arm, compressor means actuated by said scanning means for actuating said piston to load said dancer arm, and sensor and computing means connected to said control means and said unwind means for applying initial tension on said first web of material to vary said unwind means and said control means to adjust the tension on said first web of material so that said material has a stretch equal to the predetermined stretch on said second web of material.
7. A device according to claim 6, wherein said means for feeding said first web of material to said laminating rolls include a plurality of driven feed rolls, said scanning means including a photo-electric cell.
8. A device according to claim 6, wherein said means for feeding said first web of material to said laminating rolls include a plurality of driven feed rolls, said scanning means in-cluding a photo-electric cell, said sensor and computer means including a potentiometer operatively electrically connected to said unwind means.
9. A device according to claim 6, wherein said means for feeding said first web of material to said laminating rolls include a plurality of driven feed rolls, said scanning means including a photo-electric cell, said sensor and computer means including a potentiometer operatively electrically connected to said unwind means, said unwind means including an endless belt engaging said first web of material, and a motor for driving said endless belt.
10. A device according to claim 6, wherein said means for feeding said first web of material to said laminating rolls include a plurality of driven feed rolls, said scanning means including a photo-electric cell, said sensor and computer means including a potentiometer operatively electrically connected to said unwind means, said unwind means including an endless belt engaging said first web of material, and a motor for driving said endless belt, said sensor and computer means including a rotational potentiometer connected to said dancer arm for mea-suring the position of said dancer arm and computing a signal therefrom to send to said motor for adjusting the speed of said motor.
11
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68685484A | 1984-12-27 | 1984-12-27 | |
| US686,854 | 1984-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1280680C true CA1280680C (en) | 1991-02-26 |
Family
ID=24758023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000498593A Expired - Lifetime CA1280680C (en) | 1984-12-27 | 1985-12-24 | Detection and control of stretch in film material |
Country Status (6)
| Country | Link |
|---|---|
| AU (1) | AU581717B2 (en) |
| BE (1) | BE903958A (en) |
| CA (1) | CA1280680C (en) |
| FR (1) | FR2575449B1 (en) |
| GB (1) | GB2170186B (en) |
| IT (1) | IT1208729B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1200031B (en) * | 1985-10-02 | 1989-01-05 | Colgate Palmolive Co | TENSION CONTROL DEVICE IN TAPE MATERIALS UNLOADING FEED ROLLERS |
| DE3905400A1 (en) * | 1989-02-22 | 1990-08-23 | Roland Man Druckmasch | DEVICE FOR CHANGING THE RAILWAY LOCATION OF A PRINTED MATERIAL RAIL |
| EP1187301B1 (en) * | 1996-05-30 | 2006-10-04 | ATOP S.p.A. | Wire tensioner for dynamo-electric machine coil winder |
| US5826774A (en) * | 1996-05-30 | 1998-10-27 | Axis Usa, Inc. | Wire tensioner for dynamo-electric machine coil winder |
| NL1014995C2 (en) * | 2000-04-20 | 2001-10-24 | Beiler Beheer Bv | Method and device for forming a longitudinal fiber web. |
| CN100458618C (en) * | 2006-05-29 | 2009-02-04 | 上海德重科技有限公司 | Precontrol algorithm for film tracting machine rolling perimeter |
| CN103449225B (en) * | 2013-08-30 | 2016-09-28 | 湖北中烟工业有限责任公司 | Cork paper puts paper device |
| CN104876047A (en) * | 2015-05-25 | 2015-09-02 | 苏州爱立方服饰有限公司 | Tensile force automatic adjusting device for coating machine cloth unwinding roller |
| CN113601025B (en) * | 2021-07-28 | 2023-07-14 | 广东宏石激光技术股份有限公司 | Clamping device for ultrathin material and clamping method thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2088984A (en) * | 1935-04-15 | 1937-08-03 | C G Haubold Ag | Setting device for the entry section of tensioning or tentering and drying machines for webs |
| US3510374A (en) * | 1964-04-20 | 1970-05-05 | Industrial Nucleonics Corp | Method and control apparatus for regulating apparatuses |
| US3335928A (en) * | 1965-06-09 | 1967-08-15 | Hurletron Inc | Control of web elongation |
| DE1928086A1 (en) * | 1969-06-02 | 1970-12-10 | Bbc Brown Boveri & Cie | Equipment on printing machines to keep the paper feed constant by electrical means |
| US3762125A (en) * | 1971-03-17 | 1973-10-02 | Morrell & Co John | Film registration apparatus |
| JPS5481463A (en) * | 1977-12-12 | 1979-06-28 | Fuji Electric Co Ltd | Take-up motion system |
| FR2458501B1 (en) * | 1979-06-08 | 1986-03-21 | Astin France | DEVICE FOR REGULATING THE TENSION OF A TRAVELING BELT |
| US4347993A (en) * | 1979-11-06 | 1982-09-07 | W. J. Industries, Incorporated | Tension monitor means and system |
| JPS58220039A (en) * | 1982-06-15 | 1983-12-21 | Toyo Shokuhin Kikai Kk | Material feeding control system |
| JPS59184654A (en) * | 1983-04-04 | 1984-10-20 | Toppan Printing Co Ltd | Laminater arranged to printer |
-
1985
- 1985-12-20 IT IT8548970A patent/IT1208729B/en active
- 1985-12-24 CA CA000498593A patent/CA1280680C/en not_active Expired - Lifetime
- 1985-12-24 GB GB08531735A patent/GB2170186B/en not_active Expired
- 1985-12-24 FR FR8519171A patent/FR2575449B1/en not_active Expired
- 1985-12-24 AU AU51709/85A patent/AU581717B2/en not_active Ceased
- 1985-12-30 BE BE0/216076A patent/BE903958A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| IT1208729B (en) | 1989-07-10 |
| GB2170186B (en) | 1989-01-18 |
| AU581717B2 (en) | 1989-03-02 |
| FR2575449B1 (en) | 1988-10-14 |
| IT8548970A0 (en) | 1985-12-20 |
| FR2575449A1 (en) | 1986-07-04 |
| GB2170186A (en) | 1986-07-30 |
| GB8531735D0 (en) | 1986-02-05 |
| BE903958A (en) | 1986-06-30 |
| AU5170985A (en) | 1986-07-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |