US3913855A - Device for controlling the tension in a web of material being unwound from a roll - Google Patents

Device for controlling the tension in a web of material being unwound from a roll Download PDF

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Publication number
US3913855A
US3913855A US396316A US39631673A US3913855A US 3913855 A US3913855 A US 3913855A US 396316 A US396316 A US 396316A US 39631673 A US39631673 A US 39631673A US 3913855 A US3913855 A US 3913855A
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United States
Prior art keywords
chamber
braking
piston
setting
brake
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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
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US396316A
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English (en)
Inventor
Paul Heimlicher
Jean Rohrer
Willy Scharer
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.)
Wifag Maschinenfabrik AG
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Wifag Maschinenfabrik AG
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    • 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
    • B65H23/06—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle
    • B65H23/063—Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle 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
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/70—Clutches; Couplings
    • B65H2403/72—Clutches, brakes, e.g. one-way clutch +F204
    • B65H2403/725—Brakes
    • B65H2403/7255—Disc brakes

Definitions

  • ABSTRACT In controlling the tension in a web of material unwound from a roll, the web passes over a pendulum roll and a control system is connected to the pendulum roll to measure the tension and to determine any deviations from a predetermined tension value. Based on any such deviations, one or a series of setting members are regulated and these setting members adjust the braking action on a brake disc secured to journals supporting the roll of web material and thereby control the tension in the web. Where multiple setting members are used, various combinations of the setting members can be controlled by a single pressure medium in combination with pre-tensioning springs or differential pressure mediums can be used to achieve the desired braking effect.
  • the present invention is directed to a device for controlling the tension in a web of material being unwound from a roll and, more particularly, it concerns an arrangement for checking the tension and for controlling members which regulate the braking action in a payout-control braking system acting on the roll of material.
  • a paper roll braking device in which a plurality of brake shoes act directly against the web to be braked.
  • the brake shoes are effective as long as the web of material passes in front of them. It is not possible to connect or disconnect the brake shoes by means of a control circuit. When a roll is being replaced, the brake shoes are temporarily disengaged. In this braking device, the problem exists that, when the brake shoes move into a new zone of the web, bulges develop in the roll of material which are undesirable.
  • the web as the web is unwound it passes over a pendulum roll and a control system is connected to the roll for establishing a control value and determining any deviations from the control value.
  • the signals in the control system are amplified and transmitted to setting members which adjust the braking action on brake discs firmly attached to rotatable journals inserted into the roll of material from which the web is unwound.
  • the pendulum roll As the web is withdrawn from the roll, its tension is checked by the pendulum roll and any deviations from the predetermined control tension value are converted within the control system into a suitable setting value which adjusts the tension through setting members operatively associated with the braking discs.
  • control system must be able to afford adjustment over a wide range.
  • the following list of parameters indicates the variations for which the control system must afford adjustment.
  • a differential of 5 to 50 kgs. per meter of web width may be required, accordingly, there is an adjustment range of 1:10.
  • the overall tension has to be modified if the web tension set forth in item I above is to be maintained, for instance, in a width ranging from A to 4/4, there is an adjustment range of 1:4.
  • FIG. I is a schematic illustration of the control system embodying the present invention.
  • FIG. 2 is a sectional view of a portion of the system shown in FIG. 1;
  • FIG. 3 is a cross-sectional representation of a pair of the setting members shown in FIG. 2;
  • FIG. 4a is a sectional view of four setting members with only one setting member effecting a braking action
  • FIG. 4b is a partial representation of the showing in FIG. 4a with two of the setting members efi'ecting a braking action;
  • FIG. 4c is similar to FIG. 4b and shows three setting members providing the braking action
  • FIG. 4d is similar to FIGS. 4b and 40 with all of the setting members combining to provide the braking ac tion. that is the complete braking power;
  • FIG. 5 is a graphic representation of the braking action illustrated in FIGS. 4a 4d;
  • FIG. 6 is a schematic showing of an arrangement utilizing eight setting members
  • FIG. 7 is a side view of the arrangement shown in FIG. 6;
  • FIG. 8 is a partial sectional view of setting members connected to a braking clamp
  • FIG. 9 is a sectional view of a setting member including a diaphragm seal
  • FIG. 10 is a sectional view of an arrangement similar to FIG. 8 with two series-arranged setting members operatively associated with a braking clamp;
  • FIG. 11 is a schematic showing of braking clamps each associated with a pair of setting members
  • FIG. 12 is a side view of the arrangement shown in FIG. 11;
  • FIG. 13 is a side view, similar to FIG. 12, illustrating an alternate arrangement of the setting members
  • FIG. I4 is a schematic representation of the setting members utilizing counter-pressure
  • FIG. 15 is a schematic representation of an embodiment, similar to FIG. 14, utilizing subtraction relays in combination with the setting members.
  • FIG. I a web 2 of material is being withdrawn from a roll I of the material and a braking action is applied to the roll for effecting the desired tension in the web.
  • a braking action is applied to the roll for effecting the desired tension in the web.
  • the web 2 is removed from the roll, it passes over a pendulum roller 3 and a control system is connected to the pendulum roller for determining the actual tension in the web 2.
  • the control system consists of a control valve transmitter 4 and an operating value monitor 5 which measures any deviations in the tension from the predetermined control value.
  • a regulating device 6 is arranged in communication with the control value transmitter 4 and the operating value monitor 5 for removing signals from both of these devices and, based on the signals received, transmitting a setting value to the setting memher 7 for adjusting, if necessary, the tension in the web.
  • the braking action on the roll is obtained by the action of four brake pistons selectively operatively associated with disc brakes.
  • the apparatus is shown for transmitting the setting value from the regulating device 6 over a line 8 to four setting members 70, 7b, 7c and 7d.
  • Each pair of setting members 7a and 7b, 7c and 7d is associated with a brake disc 9 and generates the required braking effect which is transmitted by the brake discs to the journals 10 to which the brake discs are fixed.
  • the journals 10 are rotatably supported in brackets 11 mounted on a shaft 12 supported in a machine frame 13. As illustrated in FIG. 2, the journals 10 fit into the roll of material being unwound and rotate with the roll.
  • each setting member forms a chamber containing a piston 14 and a pre-tensioning spring 15.
  • a nut 17 positioned within the chamber and in contact with the spring 15, effects the pre-tensioning of the spring.
  • the combination of the pressure medium supplied through line 8 into the chamber of the setting member and the pre-tensioning spring control the displacement of a brake lining 16 positioned on the piston which contacts the surface of the brake disc 9 exteriorly of the chamber within the setting member.
  • variable control of the braking action is indicated by a variable adjustment of the pretensioning springs within the setting members Ia-7d.
  • FIG. 401 only the brake lining I6 of the piston 14 within the chamber of setting member 7a is displaced into engagement with the brake disc 9, the brake linings 16 associated with the other setting members are maintained in spaced relation from the associated brake disc because of the differential pretensioning provided in the different setting members.
  • the pretensioning is arranged in an increasing manner from setting member 7a to setting member 7d.
  • V V and 1. represent the effect of the pre-tensioning springs in setting members 7b, 7c and 7d, respectively.
  • the value of the pretensioning action on the spring 15 in the setting mem ber 7a is assumed to be equal to zero.
  • the braking effect B the effect of the tensioning spring must be overcome before any braking action occurs.
  • the relative braking effect of the combined braking actions is indicated.
  • FIGS. 2-4a to 4d a pair of setting members is associated with each brake disc 9, a great variety of arrangements of the setting members can be provided.
  • eight setting members are associated with a single brake disc 9 with the setting members being arranged in pairs and being spaced equiangularly apart about the periphery of the brake disc.
  • the setting members described thus far have had the brake lining 16 located on the piston 14, however, in FIG. 8 the brake lining I6 is mounted on a braking clamp operatively connected to a setting member 7a.
  • a braking clamp operatively connected to a setting member 7a.
  • a diaphragm seal is provided within the chamber of the setting member so that it separates the inlet of the pressure medium into the chamber from the piston 14.
  • FIG. shows a setting member 70 containing a pair of seriesarranged chambers for operating the braking clamp.
  • the chamber of the setting member 7a is divided into two sub-chambers each containing a separate piston 14a, 14b and spring a, 15b.
  • the pressure acting through line 8 acts only on piston 14a and is reduced at first by the countereffect of the spring 15a.
  • the piston 14b is displaced against the effect of the spring 15b and after it traverses the distance a it contacts the piston 14a and the combined effect of both pistons affords an increased braking effect.
  • FIG. 11 shows a pair of laterally spaced setting members are associated with a braking clamp.
  • Each of the setting members is connected to the line 8 and a variable action can be provided by means of the pretensioning springs within the setting members.
  • a side view of FIG. 11 shows the setting members located one above the other on the lower end of the braking clamp.
  • the setting members are arranged in side-by-side relationship on the braking clamp.
  • FIG. 14 an arrangement of setting members a- 20d is illustrated in which a counter-pressure affords the differential braking action of the setting members.
  • setting member 200 only one side of the doubleacting piston is supplied with a pressure medium through a branch off the line 8 which is controlled by the regulating device 6.
  • a pressure medium line is connected on the opposite side of the piston from the side acted on by the pressure medium received from the branch line off the line 8.
  • the counter-pressure is provided through a line 18 which is connected to each of the pressurereducing valves l9b-l9d associated with the setting elements 20b-20d, respectively.
  • the pressure-reducing valves supply a variable counter-pressure to the opposite sides of the pistons in the setting members 20b-20d.
  • FIG. 15 another arrangement is shown, similar to FIG. 14, however, instead of the pressure-reducing valves, subtraction relays Zlb-Zld are used for providing a variable braking effect in each of the setting members.
  • the setting member 20a receives the pressure medium directly from the line 8 controlled by the regulating device 6, however, each of the other setting members has a branch line connected from the line 8 to the subtraction relays 2lb-2ld.
  • a spring 22b, 22c, 22d is associated with each of the subtraction relays 21b, 2 I0, 21d, respectively, and by means of the springs the relays are set to a desired initial pressure.
  • the pressure supplied through the line 8 and controlled by the regulating device 6 must overcome the counteracting force of the springs 2217-2211 before the corresponding setting members become effective. Accordingly, a differential initial pressure controlling each of the setting members is provided so that a variable braking power can be applied to the brake discs.
  • Device for controlling the tension in a web of material being unwound from a roll by means of a pay-out control braking action comprising a machine frame, a
  • control system connected to said pendulum roller, said control system comprises a control value transmitter in communication with said pendulum roller for establishing the tension in the web passing over said roller, an operating value monitor in communication with said pendulum roller for measuring any deviations of the tension in the web from the tension value set in said transmitter, a regulating device in communication with said control value transmitter and said operating value transmitter for receiving signals therefrom, a brake member secured to said journal, a plurality of separate setting members each disposed in communication with said regulating device and each arranged to be operatively associated with said brake member at a difi'erent value transmitted from said regulating
  • each said setting member comprises means forming a chamber, a braking piston displaceably mounted within said chamber, a line connected to said chamber for admitting a pressure medium into said chamber, said countereffect means comprises means for biasing said braking piston in the direction opposite to the direction of said braking piston as biased by the pressure admitted through said line, said setting member includes means displaceable by said braking piston for effecting the braking action on said brake disc, and said line connected to said regulating device which controls the pressure of the pressure medium into said chamber.
  • each said setting member comprises means forming a chamber, a braking piston displaceably mounted within said chamber, a line con nected to said chamber for admitting a pressure medium into said chamber, said countereffect means comprises means for biasing said braking piston in the direction opposite to the direction said braking piston is biased by the pressure admitted through said line, said setting member includes means displaceable by said braking piston for effecting the braking action on said discs, said line connected to said regulating device which controls the pressure of the pressure medium admitted into said chamber, said means for effecting the braking action comprises a braking clamp operatively connected to said setting member, a brake lining mounted on said braking clamp and arranged to be displaced into contact with said brake disc, said braking piston arranged to operate said brake clamp for displacing said brake linings against said brake disc.
  • each said setting member comprises means forming a chamber, at least certain of said setting members having a double-acting piston within said chamber, each of said chambers containing a double-acting piston including a first line connected to said chamber for supplying pressure medium to one side of said piston, said first line controlled by said regulating device, a seond line connected to said chamber on the other side of said piston for supplying another pressure medium thereto separate from the pressure medium supplied through said first line, and an adjustable pressure-reducing valve positioned in said second line for varying the pressure medium supplied to the other side of said piston so that differential pressure can be applied to the opposite sides of said braking piston.
  • each said setting member comprises means forming a chamber, a braking piston displace-ably mounted within said chamber, a substraction relay associated with at least certain of said setting members, a first line connected between said regulating device and said subtraction relay for actuating said subtraction relay, a second line connected to said subtraction relay for supplying the pressure medium into said relay, a third line connected between said subtraction relay and said chamber for supplying pressure medium from said relay into said chamber, a spring positioned within said relay for establishing a desired initial pressure within each said setting member with which said relay is associated, said springs within said relay each affording a different initial counter-pressure whereby a differential pressure is available in different said setting members for varying a braking action on said journal.
  • said means for pre-tensioning said braking piston comprises a pretensioning spring within said chamber in contact with said braking piston, and an adjustable member positioned within said chamber in contact with said spring and movably positionable within said chamber for pretensioning said spring and establishing a biasing action on said piston acting oppositely to the pressure medium admitted into said chamber.
  • said means for effecting the braking action comprises a brake lining mounted on said braking piston and arranged to be displaced into contact with said brake disc.

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
US396316A 1972-09-11 1973-09-11 Device for controlling the tension in a web of material being unwound from a roll Expired - Lifetime US3913855A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE11695/72A SE366007B (enrdf_load_stackoverflow) 1972-09-11 1972-09-11

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US3913855A true US3913855A (en) 1975-10-21

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US396316A Expired - Lifetime US3913855A (en) 1972-09-11 1973-09-11 Device for controlling the tension in a web of material being unwound from a roll

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US (1) US3913855A (enrdf_load_stackoverflow)
CH (1) CH563301A5 (enrdf_load_stackoverflow)
DE (1) DE2344591A1 (enrdf_load_stackoverflow)
FR (1) FR2199325A5 (enrdf_load_stackoverflow)
GB (1) GB1398662A (enrdf_load_stackoverflow)
IT (1) IT994214B (enrdf_load_stackoverflow)
SE (1) SE366007B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040043A (en) * 1976-03-26 1977-08-02 Amf Incorporated Film sensing apparatus
US4709872A (en) * 1986-03-12 1987-12-01 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Web tension control and emergency stop system
US5186409A (en) * 1989-05-12 1993-02-16 Kabushikigaisha Tokyo Kikai Seisakusho Tension control device for printing paper
RU2162435C1 (ru) * 2000-01-10 2001-01-27 Открытое акционерное общество "Ракетно-космическая корпорация "Энергия" им. С.П. Королева" Регулятор натяжения гибкого элемента, сматываемого с барабана (варианты)
RU2162434C1 (ru) * 2000-01-10 2001-01-27 Открытое акционерное общество "Ракетно-космическая корпорация "Энергия" им. С.П. Королева" Регулятор натяжения гибкого элемента, сматываемого с барабана
EP1129971A3 (en) * 1999-12-22 2003-02-26 Tokyo Kikai Seisakusho Ltd. Paper roll braking device
US20130153704A1 (en) * 2010-11-30 2013-06-20 Toshiba Mitsubishi-Electric Industrial Systems Corporation Lead wire extraction device
US20230022433A1 (en) * 2016-01-19 2023-01-26 David Paul Goodrich Slit Sheet Tensioning Device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3437815A1 (de) * 1984-10-16 1986-04-17 Maschinenfabrik Goebel Gmbh, 6100 Darmstadt Einrichtung zum steuern der spannung in einer bahn
DE4213052A1 (de) * 1992-04-21 1993-10-28 Roland Man Druckmasch Verzögerungsvorrichtung für eine Wickelrolle
DE4232304C2 (de) * 1992-09-26 1996-02-22 Continental Ag Abwickelvorrichtung für Warenbahnen, insbesondere Elastomerfolien oder mit Elastomer beschichteten Gewebebahnen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2278240A (en) * 1938-06-08 1942-03-31 Crown Cork & Seal Co Coil unwinder
US2869684A (en) * 1954-08-05 1959-01-20 Burroughs Corp Tape feeding system
US2972452A (en) * 1957-06-12 1961-02-21 Aumann Peter Brake system for unwinders
US3465981A (en) * 1966-08-01 1969-09-09 Masson Scott Thrissell Eng Ltd Disc brakes and torque varying means therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2278240A (en) * 1938-06-08 1942-03-31 Crown Cork & Seal Co Coil unwinder
US2869684A (en) * 1954-08-05 1959-01-20 Burroughs Corp Tape feeding system
US2972452A (en) * 1957-06-12 1961-02-21 Aumann Peter Brake system for unwinders
US3465981A (en) * 1966-08-01 1969-09-09 Masson Scott Thrissell Eng Ltd Disc brakes and torque varying means therefor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040043A (en) * 1976-03-26 1977-08-02 Amf Incorporated Film sensing apparatus
US4709872A (en) * 1986-03-12 1987-12-01 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Web tension control and emergency stop system
US5186409A (en) * 1989-05-12 1993-02-16 Kabushikigaisha Tokyo Kikai Seisakusho Tension control device for printing paper
EP1129971A3 (en) * 1999-12-22 2003-02-26 Tokyo Kikai Seisakusho Ltd. Paper roll braking device
RU2162435C1 (ru) * 2000-01-10 2001-01-27 Открытое акционерное общество "Ракетно-космическая корпорация "Энергия" им. С.П. Королева" Регулятор натяжения гибкого элемента, сматываемого с барабана (варианты)
RU2162434C1 (ru) * 2000-01-10 2001-01-27 Открытое акционерное общество "Ракетно-космическая корпорация "Энергия" им. С.П. Королева" Регулятор натяжения гибкого элемента, сматываемого с барабана
US20130153704A1 (en) * 2010-11-30 2013-06-20 Toshiba Mitsubishi-Electric Industrial Systems Corporation Lead wire extraction device
US9090430B2 (en) * 2010-11-30 2015-07-28 Toshiba Mitsubishi-Electric Industrial Systems Corporation Lead wire pull-out apparatus
US20230022433A1 (en) * 2016-01-19 2023-01-26 David Paul Goodrich Slit Sheet Tensioning Device

Also Published As

Publication number Publication date
SE366007B (enrdf_load_stackoverflow) 1974-04-08
FR2199325A5 (enrdf_load_stackoverflow) 1974-04-05
GB1398662A (en) 1975-06-25
DE2344591A1 (de) 1974-03-28
IT994214B (it) 1975-10-20
CH563301A5 (enrdf_load_stackoverflow) 1975-06-30

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