CA1279247C - Stretch control of materials to be laminated or joined - Google Patents
Stretch control of materials to be laminated or joinedInfo
- Publication number
- CA1279247C CA1279247C CA000498594A CA498594A CA1279247C CA 1279247 C CA1279247 C CA 1279247C CA 000498594 A CA000498594 A CA 000498594A CA 498594 A CA498594 A CA 498594A CA 1279247 C CA1279247 C CA 1279247C
- Authority
- CA
- Canada
- Prior art keywords
- stretch
- web
- rolls
- tension
- laminating rolls
- 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
- 239000000463 material Substances 0.000 title claims abstract description 84
- 238000010030 laminating Methods 0.000 claims abstract description 27
- 230000011664 signaling Effects 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 description 5
- 239000004020 conductor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- PENWAFASUFITRC-UHFFFAOYSA-N 2-(4-chlorophenyl)imidazo[2,1-a]isoquinoline Chemical compound C1=CC(Cl)=CC=C1C1=CN(C=CC=2C3=CC=CC=2)C3=N1 PENWAFASUFITRC-UHFFFAOYSA-N 0.000 description 1
- 230000005483 Hooke's law Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/12—Controlling movement, tension or position of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
- B32B38/1825—Handling of layers or the laminate characterised by the control or constructional features of devices for tensioning, stretching or registration
-
- 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
-
- 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
- B65H23/185—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 motor-controlled
-
- 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
- B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
- B65H23/1882—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling longitudinal register of web
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H39/00—Associating, collating, or gathering articles or webs
- B65H39/16—Associating two or more webs
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
STRETCH CONTROL OF MATERIALS
TO BE LAMINATED OR JOINED
ABSTRACT OF THE DISCLOSURE
A device for controlling the stretch on two web materials being laminated comprising a supply roll of a first web material. Feed rolls with a tach generator feed back unit deliver the first material past at least two tension load cells before delivering the first material to a laminating roll where a second material has been delivered and whose stretch has been measured or determined independently or with a similar device.
The signals of the tach generator and the load cells are delivered to a computer as inputs which provide an output to the unit necessary to control the stretch on the first web so it equals the stretch on the second. The necessary single output signal (to control the tension on the first material) controls the speed of an unwind belt for the first material. Alternatively, a dancer arm is used and, therefore, there are two output signals:
one output signal is for the speed of the unwind belt which is controlled by the position of the dancer arm (being ideally a position control only); the second necessary output signal con-trols the tension in the first material and can be to a sliding weight positioner on the dancer arm or it can be a directly-applied load on the dancer arm such as an air pressure signal to an air cylinder.
TO BE LAMINATED OR JOINED
ABSTRACT OF THE DISCLOSURE
A device for controlling the stretch on two web materials being laminated comprising a supply roll of a first web material. Feed rolls with a tach generator feed back unit deliver the first material past at least two tension load cells before delivering the first material to a laminating roll where a second material has been delivered and whose stretch has been measured or determined independently or with a similar device.
The signals of the tach generator and the load cells are delivered to a computer as inputs which provide an output to the unit necessary to control the stretch on the first web so it equals the stretch on the second. The necessary single output signal (to control the tension on the first material) controls the speed of an unwind belt for the first material. Alternatively, a dancer arm is used and, therefore, there are two output signals:
one output signal is for the speed of the unwind belt which is controlled by the position of the dancer arm (being ideally a position control only); the second necessary output signal con-trols the tension in the first material and can be to a sliding weight positioner on the dancer arm or it can be a directly-applied load on the dancer arm such as an air pressure signal to an air cylinder.
Description
lZ~24~
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
This invention relates to a device for controlling the stretch of materials being joined and, more particularly, to a device for assuring equal stretch in two materials being lamin-ated or joined by varying the web tensions of one or more of the materials being joined.
DESCRIPTION OF THE PRIOR ART
The prior art shows use of control systems to achieve constant tension on individual or all materials to be laminated and required operator skill and careful monitoring of quality of the final laminate~ This is disclosed in an article entitled "The Art of Roll to Roll Adhesive Laminating" as published in Convert r magazine, December, 1981.
I Load cells and dancer arms have been used in the past to control the tension on a web being fed as disclosed in United States Patent No. 2,753,128, as well as Japanese Patent No.
44-12163 and British Patent No. 1,371,760.
. United States Patent No. 2,627,296 to Secrest dis-j, closes an apparatus including means for adjusting the tension in j a web of fabric.
United States Patent No. 3,239,161 to Dutro et al discloses a drive control mechanism which dispenses an elongated web of material with the speed and tension thereof being adjust-able.
1279Z~7 The United States patent, No. 3,510,374, to Walker 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.
United States Patent ~o. 3,107,679 to Pawlowski dis-closes an automatic tension control device which utilizes either pneumatic or electricaly circuitry to maintain the tension in a web of material substantially constant.
United States Patent No. 3,762,125 to Prena discloses a device for controlling the lamination of one material onto another material which utilizes a photocell 50 which is respon-sive to indicia 48 on the film "F" which sends the information to a control box 34 of a clutch 39 which controls the stretch rollers 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 torque applied to the tension control roll to thereby control the web tension. I
I
' SUMMARY OF THE INVENTION
It is therefore the primary object of the invention to provide a device capable of carrying out a process of control-ling the tension on at least one of two webs of m~terial being ~7~;3~4~7 laminated so that the materials heing laminated have equal stretch.
The stretch control device accordinq to the invention includes a supply roll of a first web material. Feed rolls with a tach generator feed back unit deliver the first material past at least two tension load cells before delivering the first material to a laminating roll where a second material has been delivered and whose stretch has been measured or determined independently or with a similar device. The signal of the tach generator and the load cells are delivered to a computer as inputs which provide an output to the unit necessry to control the stretch on the first web so it equals the stretch on the second. The necessary single output signal ~to control the tension on the first material) controls the speed of an unwind belt for the first material.
Alternatively, a dancer arm is used and, therefore, there are two output signals: one output signal is for the speed of the unwind belt which is controlled by the position of the dancer arm (being ideally a position control only); the second necessary output signal controls the tension in the first material and can be to a sliding weight positioner on the dancer arm or it can be a directly-applied load on the dancer arm such as an air pressure signal to an air cylinder.
The present invention thus provides a device for stretch control of materials to be laminated and/or joined comprising: a first material supply roll having an unkown elasticity, laminating rolls, first feed rolls for delivering said first material to said laminating rolls, means supplying a second material to said 127~ 7 laminating rolls in a predetermined stretched condition, and means for applying tension on said first material to automatically stretch said first material to an extent substantially the same as that of said second material so that said first material and said second material will be joined with substantially equal stretch thereon.
- 4a -1279Z4~7 BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic diagram of a stretch control device according to the present invention; and, Fig. 2 is a schematic diagram of a modified form of stretch control device according to the present invention.
DETAILED DESCRIPTION OF THE I~ENTION
~ ith continuing reference to the accompanying draw-ings, wherein like reference numerals designate similar parts throughout the various views, in Fig. 1 there is provided a first supply roll 10 for a first material 12. The material 12 has an elasticity "E" and is first fed from the supply roll by an unwind belt 31 over roll 14 and thence to a tension load cell 16 for adjustably varying the tension on material. The tension load cell is shown with a tension spring as an optional buffer. A
dancer arm with a tension adjust feature may be alternatively used in lieu of the load cell 16 and is depicted in Fig. 2.
The material 12 is then fed past roll 18 and then through feed rolls 19 with tach generator 20 and then past a tension load cell 22 and thence through laminating rolls 24 and 26. A tach generator or encoder 28 is associated with laminating roll 24.
A second material 30 is also fed through the lamina- ¦
ting rolls 24 and 26.
~1 ~
127924~7 E = Apparent or calculated elasticity of the material 12.
(unknown value) L = Free-length (relaxed length of material 12 ver pro-duct per minute.
Ll = Linear feed rate of first feed rolls 19, i.e.
stretched length of material per proauct per minuts entering the feed roll 19. Rolls 14, 16, 18 may be driven at the same rate as feed rolls 19.
L2 = Linear feed rate of laminating rolls 24 and 26, i.e.
stretched length of material 30 per product per minute entering the laminating rolls.
Tl = Tension in material 12 prior to first feed roll 19.
T2 = Tension in material 12 after drawing step, i.e.
between feed roll 19 and laminating rolls 24 and 26.
EQUATIONS
1. Hooke's Law: Tl = Ll-L, T2 = L2~L
E L E L
L = Ll L = L2 (Tl) +1 (T2) +1 E E
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
This invention relates to a device for controlling the stretch of materials being joined and, more particularly, to a device for assuring equal stretch in two materials being lamin-ated or joined by varying the web tensions of one or more of the materials being joined.
DESCRIPTION OF THE PRIOR ART
The prior art shows use of control systems to achieve constant tension on individual or all materials to be laminated and required operator skill and careful monitoring of quality of the final laminate~ This is disclosed in an article entitled "The Art of Roll to Roll Adhesive Laminating" as published in Convert r magazine, December, 1981.
I Load cells and dancer arms have been used in the past to control the tension on a web being fed as disclosed in United States Patent No. 2,753,128, as well as Japanese Patent No.
44-12163 and British Patent No. 1,371,760.
. United States Patent No. 2,627,296 to Secrest dis-j, closes an apparatus including means for adjusting the tension in j a web of fabric.
United States Patent No. 3,239,161 to Dutro et al discloses a drive control mechanism which dispenses an elongated web of material with the speed and tension thereof being adjust-able.
1279Z~7 The United States patent, No. 3,510,374, to Walker 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.
United States Patent ~o. 3,107,679 to Pawlowski dis-closes an automatic tension control device which utilizes either pneumatic or electricaly circuitry to maintain the tension in a web of material substantially constant.
United States Patent No. 3,762,125 to Prena discloses a device for controlling the lamination of one material onto another material which utilizes a photocell 50 which is respon-sive to indicia 48 on the film "F" which sends the information to a control box 34 of a clutch 39 which controls the stretch rollers 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 torque applied to the tension control roll to thereby control the web tension. I
I
' SUMMARY OF THE INVENTION
It is therefore the primary object of the invention to provide a device capable of carrying out a process of control-ling the tension on at least one of two webs of m~terial being ~7~;3~4~7 laminated so that the materials heing laminated have equal stretch.
The stretch control device accordinq to the invention includes a supply roll of a first web material. Feed rolls with a tach generator feed back unit deliver the first material past at least two tension load cells before delivering the first material to a laminating roll where a second material has been delivered and whose stretch has been measured or determined independently or with a similar device. The signal of the tach generator and the load cells are delivered to a computer as inputs which provide an output to the unit necessry to control the stretch on the first web so it equals the stretch on the second. The necessary single output signal ~to control the tension on the first material) controls the speed of an unwind belt for the first material.
Alternatively, a dancer arm is used and, therefore, there are two output signals: one output signal is for the speed of the unwind belt which is controlled by the position of the dancer arm (being ideally a position control only); the second necessary output signal controls the tension in the first material and can be to a sliding weight positioner on the dancer arm or it can be a directly-applied load on the dancer arm such as an air pressure signal to an air cylinder.
The present invention thus provides a device for stretch control of materials to be laminated and/or joined comprising: a first material supply roll having an unkown elasticity, laminating rolls, first feed rolls for delivering said first material to said laminating rolls, means supplying a second material to said 127~ 7 laminating rolls in a predetermined stretched condition, and means for applying tension on said first material to automatically stretch said first material to an extent substantially the same as that of said second material so that said first material and said second material will be joined with substantially equal stretch thereon.
- 4a -1279Z4~7 BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic diagram of a stretch control device according to the present invention; and, Fig. 2 is a schematic diagram of a modified form of stretch control device according to the present invention.
DETAILED DESCRIPTION OF THE I~ENTION
~ ith continuing reference to the accompanying draw-ings, wherein like reference numerals designate similar parts throughout the various views, in Fig. 1 there is provided a first supply roll 10 for a first material 12. The material 12 has an elasticity "E" and is first fed from the supply roll by an unwind belt 31 over roll 14 and thence to a tension load cell 16 for adjustably varying the tension on material. The tension load cell is shown with a tension spring as an optional buffer. A
dancer arm with a tension adjust feature may be alternatively used in lieu of the load cell 16 and is depicted in Fig. 2.
The material 12 is then fed past roll 18 and then through feed rolls 19 with tach generator 20 and then past a tension load cell 22 and thence through laminating rolls 24 and 26. A tach generator or encoder 28 is associated with laminating roll 24.
A second material 30 is also fed through the lamina- ¦
ting rolls 24 and 26.
~1 ~
127924~7 E = Apparent or calculated elasticity of the material 12.
(unknown value) L = Free-length (relaxed length of material 12 ver pro-duct per minute.
Ll = Linear feed rate of first feed rolls 19, i.e.
stretched length of material per proauct per minuts entering the feed roll 19. Rolls 14, 16, 18 may be driven at the same rate as feed rolls 19.
L2 = Linear feed rate of laminating rolls 24 and 26, i.e.
stretched length of material 30 per product per minute entering the laminating rolls.
Tl = Tension in material 12 prior to first feed roll 19.
T2 = Tension in material 12 after drawing step, i.e.
between feed roll 19 and laminating rolls 24 and 26.
EQUATIONS
1. Hooke's Law: Tl = Ll-L, T2 = L2~L
E L E L
L = Ll L = L2 (Tl) +1 (T2) +1 E E
2. Substitute for L to find E:
Ll 2 (Tl ) +1 = (T2 ) E E
,', Ll (T2~1) = L2 (Tl ~ E E
1, .-,LlT2+Ll = L2Tl + L2 ~ E E
1~ L2-Ll 1~
Il l ~279~7 3. Substitute E back to Equation #l and calculate L.
L = Ll = L T -L ~1 T (L -L ) 1 T - T
Ll 2 (Tl ) +1 = (T2 ) E E
,', Ll (T2~1) = L2 (Tl ~ E E
1, .-,LlT2+Ll = L2Tl + L2 ~ E E
1~ L2-Ll 1~
Il l ~279~7 3. Substitute E back to Equation #l and calculate L.
L = Ll = L T -L ~1 T (L -L ) 1 T - T
4. Set Ll and L2 at constant speeds or values and manipulate Tl to maintain L near a target value. L is calculated from Equation #3 by a microprocessor at intevals and compared to a set point or target value. Input signals are required for Ll, L2, Tl T2, from Tachometer generators 20 and 28 and tension load cells 16 and 22. ;
For Fig. 1 corrective action is taken by adjusting the speed of the D.C. motor 32 for the material unwind to speed up or slow down the material unwind which directly affects L and Tl. Corrective action can be in fixed increments or can be proportional to the size of the difference between "Calculated L" and "Target L."
In Fig. 2, the corrective action, if needed, is to change T by changing the load or the mcment arm on the dancer. When the dan-cer begins to move, the unwind motor speed will be automatically adjusted to return the dancer arm to a control position.
It is to be understood that the load cells or dancer arms may be placed in any selected location based on the location of the laminating rolls in situ.
A micro-processor or computer 34 is operatively electrically connected by conductors 36 to the various tension load cells and tach generators.
ll l Il -7-lZ79~7 An endless friction belt 38 i5 provided to provide initial tension on the material 12. Of course, any well-known means can be used to provide an initial stretch on material 30.
The embodiment shown in Fig. 2 is similar to that of Fig. 1. ~erein, initial friction on material 42 pulled from supply roll 40 is imposed by endless belt 44. The dancer arm is supported by the web of material 42 and this is the determin-ant of web tension.
The material 42 is passed over first rolls 48 and 50 and over tension load cell 52. The material 42 is then passed through feed rolls 54 with a tach generator unit and thence through another tension load cell 56 and thence between laminating rolls 58 and 60. A tach generator or encoder 62 is associated with laminating roll 58. The tach generators and tension load cells feed their input to a micro-processor or computer 64 which feeds output signals to the load on the dancer arm and/or to the motor speed of the unwind belt. The computer 64 is connected to the tach generators and tension load cells through conductors ~6. i The computer is programmed in accordance with the equations set forth hereinbefore to control the stretch of material 12 to be the same as the stretch on material 30. The computer can control j both materials to the same relaxed length (target L) should each materiAl be fitted w1th the device of thie invention.
-8- _ _ _ _ _ L
For Fig. 1 corrective action is taken by adjusting the speed of the D.C. motor 32 for the material unwind to speed up or slow down the material unwind which directly affects L and Tl. Corrective action can be in fixed increments or can be proportional to the size of the difference between "Calculated L" and "Target L."
In Fig. 2, the corrective action, if needed, is to change T by changing the load or the mcment arm on the dancer. When the dan-cer begins to move, the unwind motor speed will be automatically adjusted to return the dancer arm to a control position.
It is to be understood that the load cells or dancer arms may be placed in any selected location based on the location of the laminating rolls in situ.
A micro-processor or computer 34 is operatively electrically connected by conductors 36 to the various tension load cells and tach generators.
ll l Il -7-lZ79~7 An endless friction belt 38 i5 provided to provide initial tension on the material 12. Of course, any well-known means can be used to provide an initial stretch on material 30.
The embodiment shown in Fig. 2 is similar to that of Fig. 1. ~erein, initial friction on material 42 pulled from supply roll 40 is imposed by endless belt 44. The dancer arm is supported by the web of material 42 and this is the determin-ant of web tension.
The material 42 is passed over first rolls 48 and 50 and over tension load cell 52. The material 42 is then passed through feed rolls 54 with a tach generator unit and thence through another tension load cell 56 and thence between laminating rolls 58 and 60. A tach generator or encoder 62 is associated with laminating roll 58. The tach generators and tension load cells feed their input to a micro-processor or computer 64 which feeds output signals to the load on the dancer arm and/or to the motor speed of the unwind belt. The computer 64 is connected to the tach generators and tension load cells through conductors ~6. i The computer is programmed in accordance with the equations set forth hereinbefore to control the stretch of material 12 to be the same as the stretch on material 30. The computer can control j both materials to the same relaxed length (target L) should each materiAl be fitted w1th the device of thie invention.
-8- _ _ _ _ _ L
Claims (8)
1. A device for stretch control of materials to be laminated and/or joined comprising: a first material supply roll having an unknown elasticity, laminating rolls, first feed rolls for delivering said first material to said laminating rolls, means supplying a second material to said laminating rolls in a predetermined stretched condition, and means for applying tension on said first material to automatically stretch said first material to an extent substantially the same as that of said second material so that said first material and said second material will be joined with substantially equal stretch thereon.
2. A device according to claim 1, wherein there is a tach generator on a set of feed rolls between said supply roll and said laminating rolls for controlling said last recited means.
3. A device according to claim 1, wherein said last recited means is a tension load cell.
4. A device for stretch control of two separate webs of material being laminated comprising: first and second supply rolls for first and second webs of material, laminating rolls, means feeding said second web to said laminating rolls at a pre-determined stretch, means associated with said laminating rolls for measuring the stretch on said second web of material, means for feeding said first web of material to said laminating rolls, and means for stretching said first web to an extent substantially the same as the stretch on said second web of material.
5. A device according to claim 4, including a tach generator for measuring the stretch on said first web between said supply roll for said first web of material and said lamina-ting rolls.
6. A device according to claim 4, wherein said means for stretching said first web includes at least two tension load cells.
7. A device according to claim 4, wherein said means for stretching said first web includes at least two tension load cells, and a tach generator for measuring the stretch on said first web between said supply roll for said first web of material and said laminating rolls, said tach generator being electrically operatively connected to said tension load cells.
8. A device for stretch control of web material comprising first and second supply rolls for supplying first and second materials, laminating rolls, means for feeding the first material to said laminating rolls, a computer, first tach genera-tor means connected to said computer for measuring the stretch on said first material, first tension load cell means connected to said computer for controlling the stretch on said first material in accordance with the input to the computer from said first tach generator means, said second material being fed to said laminating rolls and second tach generator means for measuring the stretch on said second material and feeding the measured stretch to said computer, said computer comparing the stretch on both said first and second materials for signalling to increase or decrease the stretch on said first material so that the first and second materials are equally stretched.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68657384A | 1984-12-27 | 1984-12-27 | |
| US686,573 | 1984-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1279247C true CA1279247C (en) | 1991-01-22 |
Family
ID=24756875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000498594A Expired - Lifetime CA1279247C (en) | 1984-12-27 | 1985-12-24 | Stretch control of materials to be laminated or joined |
Country Status (6)
| Country | Link |
|---|---|
| AU (1) | AU585921B2 (en) |
| BE (1) | BE903956A (en) |
| CA (1) | CA1279247C (en) |
| FR (1) | FR2575451B1 (en) |
| GB (1) | GB2170485A (en) |
| IT (1) | IT1208728B (en) |
Families Citing this family (6)
| 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 |
| US4704171A (en) * | 1986-03-03 | 1987-11-03 | Adolph Coors Company | Laminating device with paper tension control |
| US4729522A (en) * | 1986-10-14 | 1988-03-08 | Webquip Corporation | Web handling apparatus |
| FR2685792A1 (en) * | 1991-12-30 | 1993-07-02 | Kodak Pathe | DIGITAL PID CONTROL. |
| DE4302189A1 (en) * | 1993-01-27 | 1994-07-28 | Roland Man Druckmasch | Electric traction mechanism |
| PL3392029T3 (en) * | 2017-04-21 | 2022-04-25 | Held Technologie Gmbh | Feeding device for a double belt press, double belt press system and method of operation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3107679A (en) * | 1961-06-05 | 1963-10-22 | Walter F Pawlowski | Automatic tension control device |
| US3762125A (en) * | 1971-03-17 | 1973-10-02 | Morrell & Co John | Film registration apparatus |
| DE2256882C3 (en) * | 1972-11-20 | 1978-04-06 | Albert-Frankenthal Ag, 6710 Frankenthal | Control device before the entry into a processing machine that pulls the paper web |
| 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 |
-
1985
- 1985-12-20 IT IT8548969A patent/IT1208728B/en active
- 1985-12-24 AU AU51707/85A patent/AU585921B2/en not_active Ceased
- 1985-12-24 FR FR8519175A patent/FR2575451B1/en not_active Expired
- 1985-12-24 CA CA000498594A patent/CA1279247C/en not_active Expired - Lifetime
- 1985-12-24 GB GB08531732A patent/GB2170485A/en not_active Withdrawn
- 1985-12-30 BE BE0/216074A patent/BE903956A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2170485A (en) | 1986-08-06 |
| GB8531732D0 (en) | 1986-02-05 |
| AU5170785A (en) | 1986-07-03 |
| FR2575451A1 (en) | 1986-07-04 |
| FR2575451B1 (en) | 1988-10-14 |
| AU585921B2 (en) | 1989-06-29 |
| IT8548969A0 (en) | 1985-12-20 |
| BE903956A (en) | 1986-06-30 |
| IT1208728B (en) | 1989-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |