US3669376A - System for controlling application of braking force to a roll of sheet material - Google Patents

System for controlling application of braking force to a roll of sheet material Download PDF

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Publication number
US3669376A
US3669376A US62310A US3669376DA US3669376A US 3669376 A US3669376 A US 3669376A US 62310 A US62310 A US 62310A US 3669376D A US3669376D A US 3669376DA US 3669376 A US3669376 A US 3669376A
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United States
Prior art keywords
roll
axis
strip
sleeve
control shaft
Prior art date
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Expired - Lifetime
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US62310A
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English (en)
Inventor
Raymond L R Lucas
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OFFICE Technology
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OFFICE Technology
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Publication date
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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
    • B65H23/06—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

Definitions

  • ABSTRACT A system for controlling the application of braking force to a [30] F w gh App i a i n i i y Dam roll of sheet material in which a sensing member controlled b Sept 1 1 1969 France 1.6931050 unwinding a surface mate a control device that in turn controls the energization of 52 us. 01 .242/7545 a brake such surface beinfl adiusiab" 511 lm. c1.
  • ..B65l1 25/28, B65h 25/22 vide braking may be fmm 1m 8 581 Field of Search ..242/75.43, 75.45 predetermined amount between the Heme ranges of the maximum and minimum roll diameters.
  • Another object of the invention is to provide a system of the above type in which a cam member operatively engages a control device which in turn controls the amount of braking force, which cam device is moved by a sensing arm, the position of which is determined by the diameter of the roll and which cam member has a cam surface that is adjustable even while the cam member is moved by the sensing arm to provide a braking force that may be varied from zero to a predetermined value between the extreme ranges of the maximum and minimum roll diameters.
  • the roll of sheet material is mounted on a shaft illustratively positioned in a horizontal plane, which shaft has a brake device illustratively of the pneumatic type associated therewith.
  • a control device comprising a sensing arm illustratively having a roller on its free end engaging the periphery of the roll of sheet material, and having its other end secured to and extending at right angles from the control shaft of the control device so that the angular position of the control shaft will be determined by the diameter of the roll.
  • control shaft is urged by suitable means in direction to urge the roller end of the sensing arm against the periphery of the roll.
  • the control shaft rigidly mounts a plate extending at right angles thereto, the plate in turn carrying a cam member in the form of an arcuate strip pivoted at one end to the plate on an axis extending at right angles to the plate.
  • the pivot mount of the strip is an eccentric adjustment pivot so that the outer arcuate periphery of the cam strip may be moved toward and away from the axis of the control shaft.
  • a second adjustment member having an eccentric cam surface on which such free end rests.
  • a valve illustratively an air valve, which has an actuating rod with a roller at its free end adapted to ride on the arcuate outer surface of the cam.
  • braking force may be provided not only at the commencement of withdrawal of sheet material from the roll, but also when the roll is substantially empty.
  • FIG. 1 is a fragmentary side elevational view of the control device
  • FIG. 2 is a sectional view taken along line 2-2 of FIG. I,
  • FIG. 3 is a sectional view taken along line 3-3 of FIG. 1;
  • FIG. 4 is a graph illustrating the operation of the equipment
  • FIG. 5 is a diagrammatic view showing the control device associated with the roll of sheet material.
  • the roll ll of sheet material has an axial bore through which extends a shaft 12.
  • One end of the shaft is suitably mounted in a bearing 13 in a vertical frame 14 and the other end of the shaft is mounted in a bearing 15in a vertical frame 16 which also carries the control device C, the shaft 12 extending through said beating I5 as at 17.
  • suitable clamp members 18 are mounted on the shaft 12 on each side of the roll 11 and are moved tightly against opposed ends of the roll and locked to the shaft by set screws 19 so that the shaft will rotate with the roll.
  • Brake mechanism 2 supported by the frame 16 is operatively connected to the protruding end 17 of the shaft to control the rotation of the latter.
  • the brake 21 is a pneumatic brake controlled by the flow of air under pressure from a valve 22, also shown in FIG. I
  • the frame 16 has spaced parallel transverse supporting members 23 and 24, each of which has an aperture 25 therethrough in which a bearing 26 is mounted. Extending through said bearings is a control shaft 27, the outer end of which mounts a hub 28 which is secured to the shaft 27 by set screw 29.
  • the hub 28 has extending radially therefrom a sensing arm 31, which, as shown in FIGS. I and 5, mounts a roller 32 at its free end designed to be urged against and ride on the periphery of the roll 1 1 adjacent one end of the roll for example.
  • the hub 33 is formed integral with the axis of a radially extending sector plate 35, more clearly shown in FIG. I, the outer periphery 36 of said plate 35 being arcuate as shown.
  • the sector plate 35 adjacent its periphery 36 has a bore 37 therethrough (FIG. 2) which is internally threaded to receive the correspondingly threaded end of a pin 38 which is headed as at 39.
  • the pin 38 extends through the bore 41 of an adjustment sleeve 42, said bore 41 being displaced from the axis of the sleeve 42 so that the latter will be eccentrically mounted on pin 38.
  • the adjustment sleeve 42 extends outwardly at right angles from the face of sector plate 35 and the reduced diameter portion 43 of sleeve 42 extends through a corresponding bore 44 adjacent one end of a cam member 45.
  • the cam member 45 is a strip substantially arcuate in contour and more particularly has an arcuate outer edge 46 and two arcuate portions 47 and 48 at its inner edge, the width of the cam member 45 being greatest at the portion thereof defined between the outer edge 46 and the inner edge portion 47.
  • the sector plate 35 has an additional bore 49 therethrough which is circumferentially displaced from the bore 37 and positioned closer to the axis of shaft 27 than is bore 37.
  • a headed screw 51 has its inner end screwed into bore 49 and extends through the bore 52 of a second or main adjustment sleeve 53.
  • the bore of adjustment sleeve 53 is of reduced diameter at its inner end defining a passageway 54 through which the screw extends.
  • a hub or collar 55 positioned in the enlarged portion of bore 52 encompasses the end of the screw 51.
  • the inner end 56 of sleeve 53 defines a cam surface 560 which is eccentric with respect to the axis of screw 51. As is clearly shown in FIG. 3, when the roll I! is full, the arcuate portion 48 of cam 45 will rest on the cam surface 56a of said main adjustment sleeve 53.
  • valve 22 which in the illustrative embodiment shown is a pneumatic valve to control flow of air under pressure from a pneumatic source to the pneumatic brake 21 which may be of any conventional type.
  • the valve 22 is mounted in position such that the axis of a roller 59 at the lower end of the control rod 61 of the valve 22 will be in the same vertical plane as the axis of shaft 27 and in the position shown with the roll having its maximum size would also be in the same vertical plane as the axis of pin 51.
  • the shaft 27 mounts a sprocket wheel 62 having an axial hub 63 secured to the shaft 27 by a set screw 64.
  • the sprocket wheel 62 is encompassed by a sprocket chain 65 which also rides around a sprocket wheel 66 which is normally urged in a clockwise direction, referring to FIGS. 1 and by a suitable coil spring S so that the shaft 27 as well as arm 31 and the roller 32 thereon will also be urged in a clockwise direction in order to maintain the roller 32 against the periphery of the roll 11 as the latter becomes of reduced diameter as the material thereon is unrolled, the stops S limiting rotation of sector plate 35 and shaft 27.
  • the arcuate surface 46 of the cam 45 may be set to a position in which it is part of the arc of circle having the axis of control shaft 27 as its center.
  • control rod 61 will be actuated in both the maximum and minimum diameter conditions of the roll so that the braking force may be exerted by the brake on the roll shaft 12.
  • the abscissa O-X represents the pressure provided by the brake and the ordinate O-Y represents the movement of the cam.
  • the origin 0 represents the setting of adjustment sleeve 42 in which the pivoted end of the cam 45 is farthest from the axis of the control shaft as shown in FIG. 1.
  • the position 0-1 on the graph represents the setting of adjustment sleeve 42 in which the pivoted end of cam 45 is closest to the axis of control shaft 27.
  • a system for controlling the application of a braking force to a roll of sheet material mounted on a shaft with which a brake coacts comprising a control shaft, a
  • sensingagsvice to effect angular displacement of said control shaft is t its axis by an amount proportional to the decrease in diameter of said roll as the sheet material is withdrawn therefrom, a movable member controlling said brake to determine the actuation of said brake based on the displacement of said movable member, a plate secured to said control shaft and extending radially therefrom, a cam member comprising a strip having an arcuate outer cam surface engaged by said movable member, said strip being pivoted at one end to said plate on an axis extending at right angles to said plate and having its other end resting on a support secured to said plate and extending at right angles thereto, and means to adjust the distance between the pivoted end of said arcuate strip and the supported end of said arcuate strip from the axis of said control shaft, whereby the position of said cam member may be adjusted with respect to said control shaft to set the force exerted by said brake on said roll shaft as the diameter of said roll increases.
  • said sensing device comprises a control arm affixed at one end with respect to said control shaft and extending at right angles with respect thereto, the free end of said control arm mounting a roller adapted to ride on the periphery of such roll.
  • a first adjustment sleeve is eccentrically mounted on said axis, said strip having an opening through which said sleeve extends to define the pivotal mount for said strip
  • a second adjustment sleeve is provided, said second sleeve being rotatably mounted on an axis extending at right angles to said plate, said second sleeve having a peripheral cam surface which is eccentric with respect to its mounting axis and which defines the support for the free end of said strip, said sleeves being adjustable to vary the position of the arcuate outer cam surface of said strip with respect to the axis of said control shaft.

Landscapes

  • Unwinding Webs (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
US62310A 1969-09-11 1970-08-10 System for controlling application of braking force to a roll of sheet material Expired - Lifetime US3669376A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6931050A FR2058514A5 (fi) 1969-09-11 1969-09-11

Publications (1)

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US3669376A true US3669376A (en) 1972-06-13

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Application Number Title Priority Date Filing Date
US62310A Expired - Lifetime US3669376A (en) 1969-09-11 1970-08-10 System for controlling application of braking force to a roll of sheet material

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US (1) US3669376A (fi)
DE (1) DE2044093A1 (fi)
FR (1) FR2058514A5 (fi)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3822838A (en) * 1972-03-20 1974-07-09 Butler Automatic Inc Web handling apparatus
US4227554A (en) * 1978-06-07 1980-10-14 Saurer-Diederichs Societe Anonyme Device for regulating the winding tension of woven fabric on a loom
US4498690A (en) * 1981-07-20 1985-02-12 Juichiro Takada Drive device for passive vehicle occupant restraint belt system
US4673141A (en) * 1985-09-12 1987-06-16 Ncr Corporation Feed control apparatus
US6651408B1 (en) * 2002-07-19 2003-11-25 New Holland North America, Inc. Adjustable force net brake mechanism and wrapping material dispensing assembly
US20110185871A1 (en) * 2010-01-30 2011-08-04 Hong Heng Sheng Electronical Technology (HuaiAn) Co., Ltd Apparatus for cutting foil
US20120292422A1 (en) * 2011-04-18 2012-11-22 Alkar-Rapidpak-Mp Equipment, Inc. Systems and methods for supplying a web of packaging material to an indexing-motion packaging machine
US11136151B1 (en) * 2018-04-23 2021-10-05 Michael Baker Orbital wrapping machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1630376A (en) * 1924-10-20 1927-05-31 Andrew Terkelsen Tension mechanism
US2396071A (en) * 1943-04-14 1946-03-05 Foote Bros Gear And Machine Co Apparatus for absorbing shock loads
US3232551A (en) * 1962-11-19 1966-02-01 Gen Aniline & Film Corp Automatic follower control for web tensioning
US3243138A (en) * 1964-04-20 1966-03-29 Akerlund & Rausing Ab Tension control for web roll

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1630376A (en) * 1924-10-20 1927-05-31 Andrew Terkelsen Tension mechanism
US2396071A (en) * 1943-04-14 1946-03-05 Foote Bros Gear And Machine Co Apparatus for absorbing shock loads
US3232551A (en) * 1962-11-19 1966-02-01 Gen Aniline & Film Corp Automatic follower control for web tensioning
US3243138A (en) * 1964-04-20 1966-03-29 Akerlund & Rausing Ab Tension control for web roll

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3822838A (en) * 1972-03-20 1974-07-09 Butler Automatic Inc Web handling apparatus
US4227554A (en) * 1978-06-07 1980-10-14 Saurer-Diederichs Societe Anonyme Device for regulating the winding tension of woven fabric on a loom
US4498690A (en) * 1981-07-20 1985-02-12 Juichiro Takada Drive device for passive vehicle occupant restraint belt system
US4673141A (en) * 1985-09-12 1987-06-16 Ncr Corporation Feed control apparatus
US6651408B1 (en) * 2002-07-19 2003-11-25 New Holland North America, Inc. Adjustable force net brake mechanism and wrapping material dispensing assembly
US20110185871A1 (en) * 2010-01-30 2011-08-04 Hong Heng Sheng Electronical Technology (HuaiAn) Co., Ltd Apparatus for cutting foil
US20120292422A1 (en) * 2011-04-18 2012-11-22 Alkar-Rapidpak-Mp Equipment, Inc. Systems and methods for supplying a web of packaging material to an indexing-motion packaging machine
US11136151B1 (en) * 2018-04-23 2021-10-05 Michael Baker Orbital wrapping machine

Also Published As

Publication number Publication date
FR2058514A5 (fi) 1971-05-28
DE2044093A1 (de) 1971-04-15

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