US3913813A - Web support with castered and gimballed roller - Google Patents

Web support with castered and gimballed roller Download PDF

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Publication number
US3913813A
US3913813A US504777A US50477774A US3913813A US 3913813 A US3913813 A US 3913813A US 504777 A US504777 A US 504777A US 50477774 A US50477774 A US 50477774A US 3913813 A US3913813 A US 3913813A
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United States
Prior art keywords
roller
web
axis
midpoint
support
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Expired - Lifetime
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US504777A
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English (en)
Inventor
John E Morse
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.)
Eastman Kodak Co
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Eastman Kodak Co
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Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US504777A priority Critical patent/US3913813A/en
Priority to CA234,682A priority patent/CA1037984A/en
Priority to FR7527684A priority patent/FR2284545A1/fr
Priority to DE2540357A priority patent/DE2540357C3/de
Priority to GB37288/75A priority patent/GB1515536A/en
Application granted granted Critical
Publication of US3913813A publication Critical patent/US3913813A/en
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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
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • 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
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/032—Controlling transverse register of web
    • B65H23/038—Controlling transverse register of web by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/15—Roller assembly, particular roller arrangement
    • B65H2404/152—Arrangement of roller on a movable frame
    • B65H2404/1521—Arrangement of roller on a movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis
    • B65H2404/15212—Arrangement of roller on a movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis rotating, pivoting or oscillating around an axis perpendicular to the roller axis

Definitions

  • a constraining member reduces the movement of the roller to rotation about the longitudinal axis, pivotal movement about a gimbal axis which is parallel to the plane of the entering web portion of the moving web and perpendicular to and intersects the longitudinal axis at the midpoint of the roller, pivotal movement about a castering axis which is substantially perpendicular to the plane of the entering web portion of the moving web and intersects the gimbal axis at a point upstream from the midpoint of the roller, and translational movement along the fixed shaft as required for pivotal movement about the castering axis.
  • This invention relates generally to a web handling device, and more specifically to a mounting mechanism for a web engaging roller in a web support which imposes no lateral constraint to the entering web portion and which angularly decouples the exiting web portion.
  • Web tracking apparatus for tracking flexible, unidirectionally moving webs on hard surfaced, cylindrical web supports can be considered functionally as comprising basically two types of web supports.
  • the linearly moving web approaching a web support sees the support, relative to a fixed frame, either as (1) a laterally constraining support or (2) a laterally non constraining support.
  • a laterally constraining support may be further subdivided into (a) an angular lateral constraint in which the entering web is constrained against changing its lateral position, except as its angular position changes, and (b) a positional lateral constraint in which the entering web is constrained against changing its spatial lateral position, while remaining free to change its angular position.
  • the web entering a non constraining support on the other hand', is free to change either its angular or its spatial lateral position without experiencing substantial lateral forces.
  • a rotating fixed-axis cylindrical roller such as an idler roller or a drive roller in a tracking apparatus
  • a rotating fixed-axis cylindrical roller is structurally an angular lateral constraint capable of constraining the moving web against change in its lateral position.
  • the entering web has to be capable of tracking on the rotating cylindrical surface until the moving web and the rotating surface are in alignment; i.e., until the longitudinal axis of the rotating surface is perpendicular to the direction of travel of the web.
  • This tracking phenomenon is due to frictional forces developed between the linearly moving web and the rotating surface, which in turn are a function of, among other variables, wrap angle, web tension, and the upstream web-span to webwidth ratio.
  • wrap angle for example, is insufficient to create the frictional forces necessary for tracking, the entering web is free to change its angular position and/or its lateral spatial position, without experiencing substantial lateral forces resulting in a web support that is functionally non constraining, although structurally an angular lateral constraint.
  • the upstream webspan to web-width ratio should be somewhat equal to or greater than one, and the wrap angle should range between approximately 30 and depending on the coefficient friction of the surfaces in contact, and on web tension. If otherwise, the web could be prevented from tracking, either because of not enough, or too much contact with the web support.
  • a laterally non constraining support as an N support
  • a laterally constraining support as a P support if it is functionally positional lateral constraint and as an A-support if it is functionally an angular lateral constraint.
  • one of the primary considerations of the design is lateral stability of the lineraly moving web.
  • stability of the linearly moving web is achieved if the tracking apparatus has at least two laterally constraining supports, at least one of which is further restricted to be a P-support; the remaining web supports, if any, in the tracking apparatus can be either laterally constraining supports (P and A) or non constraining supports (N) as dictated by design considerations.
  • This second web tracking principle dictates that the moving web exiting from a first laterally constraining support must be given freedom, once and only once, to change direction before entering a second laterally constraining support.
  • This freedom is given to the exiting web by gimballing the web support; i.e., by mounting the web support, whether of the constraining type or of the non-constraining type, for pivotal movement about a gimbal axis which is parallel to the direction of linear movement of the entering web, and which intersects the longitudinal axis of the support at the midpoint of the support.
  • the gimbal action of the web support i.e., the capability of the exiting web to change direction, enables the exiting web to compensate for non-uniformity of tension of the web in the downstream web span.
  • the resultant force of the non-uniform tension across the exiting web is at some perpendicular distance from the centerline of the moving web; the component of that resultant force which is perpendicular to the gimbal axis creates a moment about the gimbal axis which varies with the sine of the wrap angle, since the magnitude of the force component perpendicular to the gimbal axis varies with the sine of the wrap angle. For example, for wrap angles approaching zero or 180 the magnitude of the force component approaches zero and therefore, the exiting web is not free to change direc tion;
  • the once and only once requirement of the uniformity of tension principle can be illustrated by theorizing a tracking apparatus in which the web exiting from afirst laterally constraining support encounters two N- supports before entering a second laterally constraining support.
  • the once and only once requirement provides that only one of the three supports, i.e., the first laterally constraining P- or A-support, the first N- support, or the second N-support, be gimballed; the other two must prevent the exiting web from changing direction.
  • gimballing one of the supports provides uniformity of tension in the downstream web without affecting lateral stability.
  • the lateral position of the web at the second and any subsequent non-constraining gimballed support becomes unstable and indeterminate.
  • the result could be lateral instability of the web span between the first gimballed support and the second constraining web support, and possible edge damage to the moving web due to such instability.
  • the once and only once requirement ensures lateral stability in the moving web when N-supports are utilized in a tracking apparatus, while providing uniformity of tension.
  • Non-constraining N-supports disclosed by the art include low friction cylindrical non-rotating surfaces, and axially compliant rotating web supports. Such disclosed web supports, however, are not gimballed and, therefore, do not impart angular freedom to the exiting web.
  • the art also discloses web supports in which the rotating cylindrical surface of the web support is mounted for pivotal movement about caster and gimbal axes.
  • U.S..Pat. No. 3,596,817 discloses a web support having a castered and gimballed roller in which the pivotal movement about the caster and gimbal] axes is achieved by mounting the roller on a multiplicity of flexture arms. This type of mounting, although adequate for some purposes, can be impracticable for others.
  • web supports having cylindrical rollers which are rotatably mounted for pivotal movement about a gimbal axis.
  • An example is US. Pat. No. 3,608,796 in which the rotating cylindrical roller is mounted for pivotal movement about its midpoint. Such midpoint pivotal movement is reduced to pivot movement about a gimbal axis by a constraining member.
  • a web support angularly constrains the entering web; i.e., functionally, it is a gimballed A- support.
  • a single constraining member reduces the movement of the roller to pivotal movement about a gimbal axis and about a castering axis, and to translation movement along the fixed support as required for pivotal movement about the castering axis.
  • the gimbal axis is parallel to the plane of the entering web portion of the moving web and is perpendicular to and intersects the longitudinal axis of the roller.
  • the castering axis is perpendicular to the plane of the entering web at a point upstream from the midpoint of the roller.
  • a hollow cylindrical roller is supported on a fixed rigid shaft of uniform cross-section by a self-aligning radial ball bearing upon which the roller is mounted with their respective midpoints coincident.
  • the radial ball bearing enables the roller to rotate about its longitudinal axis and pivot about its midpoint, and is fixedly supported by a bushing mounted about the rigid shaft, thus enabling the roller to translate on the rigid shaft.
  • the roller may be journalled on a bushing through a plurality of flexturally mounted members between the outer surface of the bushing and the inner surface of the roller to achieve the same result.
  • the pivotal and translational movement in either embodiment is controlled by a constraining arm, defining a line of action, one end of which is mounted to the roller through an outboard bearing for pivotal movement about a pivotal axis.
  • the opposite end of the constraining arm is mounted to a fixed frame for pivotal movement about a pivot point.
  • the line of action corresponds to the centerline of the constraining arm and passes through the pivot point, intersecting the longitudinal axis of the roller at an oblique angle and the gimbal axis at a point upstream from the midpoint of the roller.
  • the pivotal axis is defined by the intersection of and is mutually perpendicular to the line of action of the constraining arm and the longitudinal axis of the roller.
  • a counterweight is mounted at the end "of the roller opposite the end upon which is mounted the outboard bearing.
  • the counterweight counterbalances the weight of the outboard bearing and the constraining arm so that the roller is statically and dynamically supported on the fixed shaft solely at its midpoint.
  • FIG. 1 is an isometric view of the web support of the invention showing the mounting mechanism" for the web transporting roller, which is partly broken away, and the relative location of the various axes; 5
  • FIG. 2a is a longitudinal cross-sectional view of the web support showing the mounting of the roller;
  • FIG. 2b is a partial side view of the web support with its constraining arm
  • FIG. 2c illustrates another embodiment of the web support of the invention and shows a roller supporting bushing which is flexurally mounted to the roller at its midpoint for achieving translation along the shaft and pivotal movement about the center of the roller;
  • FIG. 3a illustrates still another embodiment of the web support of the invention and shows a constraining arm having a yoke at one end and a ball and socket arrangement at the other end;
  • FIG. 3b is a side view of the embodiment of FIG. 3a and shows the constraining arm pivotally mounted to the roller outboard bearing for pivotal movement about an axis which intersects thelongitudinal axis of the roller.
  • FIG. 1 illustrates a web support having a castered and gimballed roller 11, in the form a hollow cylindrical drum, mounted according to the invention.
  • web support 10 further comprises a self aligning radial ball bearing 55 mounted on a ball bushing 56, an outboard bearing 80 fixedly connected to constraining arm 60 through outer ring 82, and a balancing counterweight 52.
  • Ball bushing 56 is slidably mounted on fixed shaft 51 which is supported by yoke 71, which, in turn, is mounted to fixed frame 53.
  • Bearing 55 is centrally mounted on bushing 56 and roller 11, and is fixed in position to the bushing and the roller, respectively, by locking rings 14 and locking annulus 12 (see FIG. 2a).
  • the radial ball bearing in combination with the ball bushing rotatably supports roller 11 solely at is midpoint while simultaneously enabling the roller to pivot about its midpoint and translate along shaft 51.
  • the pivotal and translational movement of roller 11 is relative to fixed frame 53 which may be the frame of a web tracking apparatus such as that disclosed in copending application Ser. No. 504,771.
  • a constraining arm 60 mechanically connecting roller 11 to yoke 71, reduces the degrees of freedom of movement of roller 11 to pivotal movement about gimbal axis 20 and castering axis 30 without affecting the rotational movement of the roller about longitudinal axis 40.
  • Constraining arm 60 comprises a stiff member 63 to which is mounted at one end a resilient wire 61 and at the opposite end a semi-rigid plate 62.
  • Resilient wire 61 is mechanically connected to yoke 71 by attaching the free end to a member which is adjustably positionable in yoke 71 by screw assembly 72.
  • Plate 62 of constraining arm 60 is bent along a line 64 (FIG.
  • roller 11 is free to rotate about its longitudinal axis 40 (which in FIG. 2a is coincident with axis 50 of shaft 51) while the inner ring 81 of outboard bearing 80 remains stationary.
  • counterweight 52 is added to the opposite end of the roller so that web support 10 is statically and dynamically balanced about the midpoint of roller 11.
  • constraining arm 60 is free to pivot in any direction at the end comprising resilient wire 61, and free to pivot about pivotal axis 65 only at the end comprising plate 62.
  • the mounting of constraining arm 60 on outboard bearing 80 is such that the line of action 66 of constraining arm 60, pivotal axis 65, and longitudinal axis 40 of roller 11, intersect at a common point.
  • pivotal axis 65 is substantially perpendicular to the imaginary plane 45 formed by line of action 66 and longitudinal axis 40 (see FIG. 1) which, for convenience, will be referred to as the entrance plane.
  • the resultant freedom of movement of roller 11, due to the various mechanical parts of web support 10 described above, is (l) pivotal movement about a gimbal axis 20, lying in the entrance plane 45, which is perpendicular to and intersects longitudinal axis 40 at the midpoint of roller 11; and (2) arcuate movement, having a radius 35, about a castering axis 30 (FIGS. 1 and 2b) which is substantially perpendicular to and intersects entrance plane 45 at the intersection between gimbal axis 20 and line of action 66 of constraining arm 60. It is clear that the magnitude of radius 35 is dependent on the oblique angle line of action 66 makes with horizontal axis 40.
  • arcuate radius 35 varies according to the amount of translation of the midpoint of the roller along shaft 51. If translation of roller is toward flexure arm 60, the castering radius becomes longer. If, on the other hand, the translation is away from flexure arm 60, the castering radius becomes shorter. However, for small translations from nominal, the castering radius remains relatively constant to a close approximation. Similarly, the gimbal axis 20 varies slightly from its nominal position. As seen in FIG. 1, and more clearly in FIG. 2b, the ends of roller 10 have arcuate motion indicated by arrow 68 rather than straight line motion along pivotal axis 65.
  • the surface of roller 11 is polished aluminum
  • the web in contact with roller 11 is polyethylene tenephthalate and has a thickness in the order of 7 mils
  • the wrap angle of web W around roller 11 is in the order of 120
  • the ratio of upstream web span to web width is approximately one
  • the web tension of the web W is approximately one-half ounce per inch.
  • web support 10 is unidirectional, i.e., it must be assembled in relation to the entering plane of the web and its direction of travel. As seen in FIGS.
  • the plane of entering web portion of the web is substantially parallel to entrance plane 45, while the direction of travel of the web is such that the castering axis 30, which is substantially perpendicular to the plane of entering web portion 15 of moving web W is upstream of web support 10.
  • roller 11 will pivot about castering axis 30 until longitudinal axis 40 is perpendicular to the direction of travel of entering web portion 15. That is, through the phenomenon of tracking discussed above, roller 11 will align itself to the entering web portion 15 by pivoting about axis 30 until its longitudinal axis is perpendicular to the direction of travel of the entering web portion.
  • roller 11 Any pivotal resistance about castering axis 30 imposed by frictional or mechanical forces which would prevent roller 11 from fully aligning itself to the direction of travel of the entering web portion 15 (thus imposing a small lateral constraint on the web), is compensated by providing roller 11 with a lowfriction, polished aluminum surface which promotes slippage between the surface of roller 11 and the web in contact with such surface.
  • roller 11 the alignment of roller 11 to the fully constrained entering web portion 15 of the moving web illustrated by the apparatus of the instant invention is the reverse of what occurs when a moving web, not fully constrained, enters an angularly constraining web support such as a fixed axis, cylindrical drum. In this latter situation, it is the entering web which aligns itself to the web support so that its direction of travel becomes perpendicular to the fixed longitudinal axis of the rotating cylindrical drum.
  • Exiting web portion 16 of moving web W is given freedom to change its angular direction, thereby angularly decoupling the fully constrained entering web portion 15 of moving web W.
  • This freedom in exiting web portion 16 to change angular direction without affecting the lateral spatial and/or angular position of the upstream entering web portion 15 is due to the capability of roller 11 to pivot about gimbal axis 20 in response to downstream conditions.
  • roller 11 will automatically compensate for any changes in perpendicularity by simply pivoting about castering axis 30.
  • exiting web portion 16 is free to change angular direction without affecting the lateral position of the entering web portion 15.
  • roller 11 is polished aluminum and the wrap angle of the web about roller 11 is approximately 120 which is in proper range for tacking and for gimballing. Since it is an N-type support, lateral slippage between roller 11 and the web in contact with roller will be beneficial to the function of the web support, which function is to present no lateral resistance to the entering web.
  • FIGS. 2c through 3b illustrate other embodiments of various parts of the invention.
  • FIG. 20 illustrates a bushing which is flexurally mounted to the roller to provide the center pivot feature. That is, the pivotal movement of roller 11 about its midpoint is achieved through flexure member 90 rather than self-aligning bearing 55 as shown in FIG. 2a.
  • FIGS. 3a and 3b illustrate the use of a yoke 92 mounted on a ball-and-socket arrangement 85, rather than flexure arm 60 as illustrated in FIG. 2a.
  • Ball and socket 85 allows yoke 92 to pivot in any direction.
  • Yoke 92 is pivotally mounted to outboard bearing by pins 93.
  • the centerline of pins 93 intersects the axis of rotation of roller 11.
  • the castering radius and the gimbal axis vary slightly from nominal. However, as noted earlier, this places no apparent restrictions on the function of the web support.
  • a web support for engaging a fully constrained moving web having an entering portion and an exiting portion relative to such web support, said web support being of the type having a web engaging cylindrical roller which presents no lateral resistance to such entering web portion and which angularly decouples such exiting web portion, the improvement which comprises:
  • c. means for constraining said pivotal and translational movement of said roller to pivotal movement about a gimbal axis perpendicular to and intersecting said longitudinal axis at said midpoint of said roller and extending in a plane substantially parallel to such entering web portion, pivotal movement about a castering axis substantially perpendicular to such entering web portion and intersecting said gimbal axis at a point upstream from said midpoint of said roller, and translational movement along said fixed axis as required for pivotal movement about said castering axis.
  • roller mounting means includes a radial ball bearing having a midpoint coincident with said midpoint of said roller for enabling said roller to pivot about its midpoint, and a bushing about said rigid shaft for fixedly supporting said radial ball bearing, and for enabling said roller to translate along said shaft.
  • roller mounting means includes a flexure member having a midpoint coincident with said midpoint of said roller for enabling said roller to pivot about its midpoint.
  • said constraining means includes:
  • a counterweight mounted at the end opposite said one end of said roller for counterbalancing said outboard bearing and said constraining arm to statically and dynamically balance said roller solely at its midpoint.

Landscapes

  • Delivering By Means Of Belts And Rollers (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Unwinding Webs (AREA)
US504777A 1974-09-10 1974-09-10 Web support with castered and gimballed roller Expired - Lifetime US3913813A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US504777A US3913813A (en) 1974-09-10 1974-09-10 Web support with castered and gimballed roller
CA234,682A CA1037984A (en) 1974-09-10 1975-09-03 Web support with castered and gimballed roller
FR7527684A FR2284545A1 (fr) 1974-09-10 1975-09-10 Nouveau support a rouleau pour bande mobile
DE2540357A DE2540357C3 (de) 1974-09-10 1975-09-10 Vorrichtung zur Anordnung einer RoUe
GB37288/75A GB1515536A (en) 1974-09-10 1975-09-10 Web support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US504777A US3913813A (en) 1974-09-10 1974-09-10 Web support with castered and gimballed roller

Publications (1)

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US3913813A true US3913813A (en) 1975-10-21

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US504777A Expired - Lifetime US3913813A (en) 1974-09-10 1974-09-10 Web support with castered and gimballed roller

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US (1) US3913813A (2)
CA (1) CA1037984A (2)
DE (1) DE2540357C3 (2)
FR (1) FR2284545A1 (2)
GB (1) GB1515536A (2)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985004643A1 (en) * 1984-04-06 1985-10-24 Eastman Kodak Company Web tracking apparatus
US4762311A (en) * 1986-07-25 1988-08-09 Veb Kombinat Polygraph "Werner Lamberz" Leipzig Adjusting roller arrangement particularly for rotary folders
US5426535A (en) * 1993-07-29 1995-06-20 Eastman Kodak Company Apparatus for removing air from between a master magnetic medium and a slave magnetic medium preceding anhysteretic transfer of signals from master to slave
EP0734984A1 (en) * 1994-03-30 1996-10-02 Xerox Corporation An idler roll assembly
US6278860B1 (en) * 2000-03-31 2001-08-21 Terry Nate Morganti Castered and gimballed cleaning web with self-tensioning
DE10116735A1 (de) * 2001-04-04 2002-10-10 Josef Gmeiner Vorrichtung zum Ausgleich von Spannkräften sowie Verfahren zu dessen Herstellung
US20050211821A1 (en) * 2004-03-26 2005-09-29 Stefan Hein Expander roller arrangement for the wrinkle-free guidance of webs
US7267255B1 (en) 2001-01-29 2007-09-11 Eastman Kodak Company Web tracking adjustment device and method through use of a biased gimbal
US20130164034A1 (en) * 2011-12-23 2013-06-27 Xerox Corporation Passive belt steering apparatus and systems
EP2570858A3 (en) * 2011-09-14 2014-04-30 Sharp Kabushiki Kaisha Belt driving device
US9745162B2 (en) 2011-12-15 2017-08-29 3M Innovative Properties Company Apparatus for guiding a moving web

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4561757A (en) * 1985-03-04 1985-12-31 Xerox Corporation Belt support apparatus
US4799502A (en) * 1985-12-24 1989-01-24 Aderans Co., Ltd. Wig
WO2025248423A1 (en) * 2024-05-27 2025-12-04 Renova S.R.L. A device for guiding and adjusting the alignment of a material tape in transit and method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596817A (en) * 1969-11-03 1971-08-03 Eastman Kodak Co Web-handling device
US3608796A (en) * 1969-11-03 1971-09-28 Eastman Kodak Co Web-supporting device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596817A (en) * 1969-11-03 1971-08-03 Eastman Kodak Co Web-handling device
US3608796A (en) * 1969-11-03 1971-09-28 Eastman Kodak Co Web-supporting device

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985004643A1 (en) * 1984-04-06 1985-10-24 Eastman Kodak Company Web tracking apparatus
US4572417A (en) * 1984-04-06 1986-02-25 Eastman Kodak Company Web tracking apparatus
US4762311A (en) * 1986-07-25 1988-08-09 Veb Kombinat Polygraph "Werner Lamberz" Leipzig Adjusting roller arrangement particularly for rotary folders
US5426535A (en) * 1993-07-29 1995-06-20 Eastman Kodak Company Apparatus for removing air from between a master magnetic medium and a slave magnetic medium preceding anhysteretic transfer of signals from master to slave
EP0734984A1 (en) * 1994-03-30 1996-10-02 Xerox Corporation An idler roll assembly
US6278860B1 (en) * 2000-03-31 2001-08-21 Terry Nate Morganti Castered and gimballed cleaning web with self-tensioning
US7267255B1 (en) 2001-01-29 2007-09-11 Eastman Kodak Company Web tracking adjustment device and method through use of a biased gimbal
DE10116735A1 (de) * 2001-04-04 2002-10-10 Josef Gmeiner Vorrichtung zum Ausgleich von Spannkräften sowie Verfahren zu dessen Herstellung
US20050211821A1 (en) * 2004-03-26 2005-09-29 Stefan Hein Expander roller arrangement for the wrinkle-free guidance of webs
US7188757B2 (en) * 2004-03-26 2007-03-13 Applied Materials Gmbh & Co. Kg Expander roller arrangement for the wrinkle-free guidance of webs
EP2570858A3 (en) * 2011-09-14 2014-04-30 Sharp Kabushiki Kaisha Belt driving device
US9745162B2 (en) 2011-12-15 2017-08-29 3M Innovative Properties Company Apparatus for guiding a moving web
US10221028B2 (en) 2011-12-15 2019-03-05 3M Innovative Properties Company Apparatus for guiding a moving web
US20130164034A1 (en) * 2011-12-23 2013-06-27 Xerox Corporation Passive belt steering apparatus and systems

Also Published As

Publication number Publication date
DE2540357A1 (de) 1976-03-25
FR2284545A1 (fr) 1976-04-09
FR2284545B1 (2) 1980-11-28
DE2540357C3 (de) 1979-11-08
DE2540357B2 (de) 1979-03-15
GB1515536A (en) 1978-06-28
CA1037984A (en) 1978-09-05

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