US20150041514A1 - Substrate rollers - Google Patents

Substrate rollers Download PDF

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Publication number
US20150041514A1
US20150041514A1 US14/238,177 US201214238177A US2015041514A1 US 20150041514 A1 US20150041514 A1 US 20150041514A1 US 201214238177 A US201214238177 A US 201214238177A US 2015041514 A1 US2015041514 A1 US 2015041514A1
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US
United States
Prior art keywords
sleeve
roller
magnets
rotatably fixed
array
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.)
Abandoned
Application number
US14/238,177
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English (en)
Inventor
Bruce Hachtmann
Preston Clover
Ross Porter
Aaron Quitugua-Flores
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.)
NuvoSun Inc
Original Assignee
NuvoSun Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NuvoSun Inc filed Critical NuvoSun Inc
Priority to US14/238,177 priority Critical patent/US20150041514A1/en
Assigned to NuvoSun, Inc. reassignment NuvoSun, Inc. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PORTER, Ross, CLOVER, Preston, HACHTMANN, BRUCE, QUITUGUA-FLORES, Aaron
Publication of US20150041514A1 publication Critical patent/US20150041514A1/en
Abandoned legal-status Critical Current

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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
    • B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or 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
    • B65H16/00—Unwinding, paying-out webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/14—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web
    • B65H18/145—Reel-to-reel type web winding and unwinding mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/31—Features of transport path
    • B65H2301/311—Features of transport path for transport path in plane of handled material, e.g. geometry
    • B65H2301/3112—S-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/31—Features of transport path
    • B65H2301/311—Features of transport path for transport path in plane of handled material, e.g. geometry
    • B65H2301/31122—Omega-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/513—Modifying electric properties
    • B65H2301/5131—Magnetising
    • 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
    • B65H2404/19—Other features of rollers
    • B65H2404/191—Other features of rollers magnetic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/70—Electrical or magnetic properties, e.g. electric power or current
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/171—Physical features of handled article or web
    • B65H2701/1714—Magnetic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/87—Photovoltaic element manufacture, e.g. solar panels

Definitions

  • Thin metal foils are often used to make a variety of useful products ranging from stamped items for automobiles to substrates for high tech coatings for electronic applications. Regardless of the specific product, thin metal foil substrates or webs in roll form are transported through some type of machine that performs one or more operations to make a final product. The handling of the webs during the processing can become difficult when extreme physical conditions are required, such as high temperatures, for example. In electronic applications where thin layers of material are coated onto the webs, the coatings may be sensitive to contact with various components of the coating equipment, which may lead to loss of yield in the manufacturing process.
  • a thin film solar cell that is deposited on a stainless steel foil substrate where contact of the coating with transport rollers may create small electronic defects in the solar cell.
  • This disclosure provides rollers for thin magnetic foil substrates with improved contact resistance for small wrap angles.
  • a roller for handling a substrate web comprises a rotatably fixed shaft and a sleeve circumscribing the rotatably (or rotationally) fixed shaft.
  • the sleeve can be configured to rotate about the shaft.
  • the roller further comprises an array of magnets adjacent to the shaft. Individual magnets of the array of magnets are oriented so as to provide magnetic field lines propagating along a direction orthogonal to the rotatably fixed shaft. The magnetic field lines are configured to couple to the substrate directed adjacent to the sleeve.
  • the rotatably fixed shaft does not rotate during rotation of the sleeve.
  • a roller for moving a substrate comprises a sleeve circumscribing a rotatably fixed shaft, wherein the sleeve is configured to rotate about the rotatably fixed shaft.
  • the roller further comprises an array of magnets disposed between the sleeve and the rotatably fixed shaft.
  • the array comprise two or more magnets that have poles that are oriented in an anti-parallel configuration so as to provide magnetic field lines propagating along a direction orthogonal to the rotatably fixed shaft, which magnetic field lines are configured to couple to the substrate disposed adjacent to the sleeve.
  • a roller system comprises a roller as described above or elsewhere herein, alone or in combination, a pay-out roll and uptake roll, and a substrate web that is directed about or along the roller from the pay-out roll to the uptake roll.
  • a method for moving a substrate web comprises providing a roller, as described above or elsewhere herein, and providing a substrate web adjacent to a sleeve of the roller. The substrate web is moved upon the coupling of the substrate web to magnetic field lines provided by the roller.
  • FIG. 2 is a schematic isometric sketch of an alternative design for a roller.
  • FIG. 3 is a schematic cross sectional side view of two roller arrangements for driving a web.
  • FIG. 4 is a schematic cross sectional layout of a web handling (or roller) system for a manufacturing operation.
  • FIG. 5 a is schematic cross sectional representation of a vacuum drum type coating machine.
  • FIG. 5 b is schematic cross sectional representation of a vacuum drum type coating machine which avoids roller contact with the coated side of the substrate.
  • FIG. 6 is a schematic cross sectional view of a roller showing the basic concept of magnetically enhancing the roller for use with thin magnetic foil substrates.
  • FIG. 7 is a schematic cross sectional view of a magnetically enhanced roller utilizing a semi-circular pole piece.
  • rotatably fixed can refer to a structure that does not rotate.
  • a rotatably fixed structure does not rotate when another structure circumscribing or circumscribed by the rotatably fixed structure rotates in relation to the rotatably fixed structure.
  • An aspect of the invention provides a roller for handling a substrate web.
  • the roller comprises a rotatably fixed shaft and a sleeve circumscribing the rotatably fixed shaft.
  • the sleeve can be configured to rotate about the shaft.
  • the rotatably fixed shaft can be configured such that the shaft does not rotate while the sleeve rotates.
  • the roller further comprises an array of magnets adjacent to the shaft. Individual magnets of the array of magnets are oriented so as to provide magnetic field lines propagating along a direction orthogonal to the rotatably fixed shaft. The magnetic field lines are configured to couple to the substrate directed adjacent to the sleeve.
  • the magnetic field lines may propagate away from said shaft (and towards said sleeve) along an angle of at least about 0°, 5°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, or 90° from a vector that is normal to a surface of said rotatably fixed shaft.
  • said angle when said angle is 0°, said magnetic field lines propagate along a direction that is orthogonal to said rotatably fixed shaft.
  • the shaft does not rotate. However, in some cases, the shaft may rotate, such as, e.g., along a direction that is opposite to the direction of rotation of the sleeve.
  • the shaft is rotatable fixed by attachment to a support member, and the sleeve is permitted to rotate by decoupling the sleeve from the shaft.
  • the roller can include one or more separation members to separate the sleeve from the shaft.
  • the separation members can be ball bearings.
  • the sleeve can be configured to rotate around (or about) the shaft with the aid of one or more bearings.
  • the roller can include at least 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 bearings, which may be situated at an opposing end of the sleeve.
  • the bearings can be ball bearings.
  • a separation member can be a spacer that enables the sleeve to be rotatably decoupled from the shaft.
  • the roller can be cylindrical in shape.
  • the shaft and/or the sleeve can be cylindrical.
  • the sleeve can be removable from the roller, such as by sliding the sleeve off of the roller.
  • the roller can include a pole piece adjacent to the rotatably fixed shaft.
  • An individual magnet of the array of magnets can be attached to the pole piece.
  • the array of magnets can include at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 magnets.
  • the array of magnets can comprise a magnet formed of a ferromagnetic material.
  • the array of magnets can comprise a magnet formed of iron, nickel, cobalt or combinations thereof.
  • the array of magnets comprises a magnet formed of one or more rare earth metals.
  • the array of magnets can include one or more electromagnets, which may be adapted to provide a magnetic field upon the application of power (or electricity) to the electromagnets.
  • the roller can be configured to direct the substrate web adjacent to the sleeve upon the application of the magnetic field lines, or upon bringing the substrate web in proximity to the sleeve such that the substrate web is attracted by the magnetic field lines.
  • the substrate web can be directed at a wrap angle (as may be measured in relation to a tangent to the sleeve).
  • the array has a radial size that is larger than the wrap angle.
  • the array may have a radial size that is less than or equal to about 99%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%, or 5% of the circumference (2 ⁇ * sleeve radius) of the sleeve.
  • the array has a radial size that is less than or equal to about 1 ⁇ 2, 1 ⁇ 3, 1 ⁇ 4, 1 ⁇ 5, 1 ⁇ 6, 1/7, or 1 ⁇ 8 of the circumference of the sleeve.
  • the array of magnets can include a first magnet having a north pole adjacent to the rotatably fixed shaft and a south pole adjacent to the sleeve, and a second magnet having a north pole adjacent to the sleeve and a south pole adjacent to the rotatably fixed shaft.
  • the array of magnets can further comprise a third magnet having a north pole adjacent to the rotatably fixed shaft and a south pole adjacent to the sleeve.
  • the second magnet can be radially disposed between the first and third magnets.
  • the third magnet can be radially disposed between the first and second magnets.
  • an individual magnet of the array of magnets is separated from the sleeve by a gap.
  • the gap can permit the sleeve to rotate without coming in contact with an individual magnet of the array of magnets.
  • Rollers provided herein may enable movement or translation of a substrate web without substantial bending or other deformation that may adversely impact the substrate web.
  • the substrate web can be translated with reduced friction, thereby aiding in improving processing efficiency and providing energy savings.
  • the substrate web can be formed of any material that magnetically attractable—e.g., a material that moves or deforms in the presence of an applied magnetic field.
  • the substrate web is provided for use in manufacturing photovoltaic (PV) solar cells.
  • PV photovoltaic
  • the roller may be used to move or direct a substrate web that includes data, such as, e.g., video, still pictures, or other information.
  • the substrate web can be a magnetic recording medium.
  • a method for moving a substrate web comprises providing a roller, as described elsewhere herein.
  • the roller can comprise a rotatably fixed shaft, a sleeve circumscribing the rotatably fixed shaft, and an array of magnets adjacent to the shaft. Individual magnets of the array of magnets are oriented so as to provide magnetic field lines propagating along a direction orthogonal to the rotatably fixed shaft.
  • a substrate is provided adjacent to the sleeve. The substrate web is then moved upon the coupling of the substrate web to the magnetic field lines.
  • the substrate web in some cases is coupled to the magnetic field lines by bringing the substrate web in proximity to the magnetic field lines, such as, for example, in proximity to the sleeve. In some cases, the substrate web is brought in contact with the sleeve. The substrate may be attracted to the substrate web with the aid of the magnetic field lines.
  • the substrate web comprises a magnetically attractable material, as described elsewhere herein.
  • the substrate web is formed of stainless steel.
  • the substrate web is moved with the aid of the roller by providing translational motion to the substrate web.
  • Translational motion can be provided along a tangential direction of the sleeve.
  • the substrate web can be moved or directed by providing motion to the substrate web along a direction that is parallel to (and in some cases orthogonal to a longitudinal axis of) a surface of the sleeve.
  • the substrate web can be moved about the sleeve by bringing the substrate web adjacent to the sleeve and providing translational motion to the substrate web or the sleeve. In some cases, the substrate web wraps around the sleeve at a wrap angle during movement.
  • Translational motion can be provided to the substrate web with the aid of a rolling member, such as a motor (e.g., tension motor) attached to another roller around which the substrate web can be wound.
  • translational motion can be provided by rotating the sleeve, such as with the aid of a motor coupled to the sleeve.
  • the motor can be configured to rotate the sleeve at a fixed angular velocity, and attraction of the substrate web to the sleeve (with the aid of the magnetic field lines) provides frictional force that is sufficient to move the substrate web along the sleeve.
  • a web may be controlled and directed through processing equipment using a system of rollers. Some of the rollers may be driven, while others may act as idlers.
  • Roller systems of the disclosure can include one or more rollers that are configured to direct a substrate web along one or more directions.
  • a roller system can direct a substrate web from a payout roll to a pickup roll.
  • Roller systems of the disclosure may be suited for thin film deposition processes, such as deposition processes suited for forming photovoltaic devices.
  • a design for a roller is shown in the isometric sketch of FIG. 1 .
  • a web 1 is shown directed over a roller comprising a polished sleeve 2 , a flange 3 , and a bearing shaft 4 running in bearings 5 .
  • the shaft need not be solid (it may be tubular, for example) and it need not extend all the way through the sleeve, but it should be rigidly attached to the flanges that are in turn attached to the sleeve.
  • the bearings can be supported as indicated schematically by blocks 6 .
  • the web 1 may make contact with the sleeve 2 over at least a portion of its circumference.
  • That angle of contact between the sleeve 2 and the web 1 may be referred to as the wrap angle, and is indicated by ⁇ .
  • the web 1 may be transported under some amount of tension ‘T’ which can be supplied by a driven element (or member) or elements (or members) somewhere else in the system, such as, for example, a motor or a plurality of motors that are adapted to provide tension to the web 1 .
  • T tension
  • the wrap angle and the coefficient of friction between the web 1 and the roller may determine the amount of force that can be applied to pull the web 1 .
  • the coefficient of friction may be a function of the tension in the web 1 .
  • FIG. 2 schematically illustrates another roller system.
  • Bearing shaft 4 extends through the sleeve as shown by the dashed lines, and is fixed so that it does not rotate as illustrated schematically by blocks 7 .
  • Bearing 5 is seated in flange 3 or is directly pressed into polished sleeve 2 , depending on sizes as may be appropriate.
  • This type of roller may allow for a simplified method of roller alignment at the fixed ends, since the bearings and their housings do not have to be dealt with at the same time.
  • FIG. 3 is a cross sectional sketch showing two roller arrangements for driving a web.
  • web 1 forms a wrap angle ⁇ of 180 degrees on the roller. Therefore the web leaves the roller in a direction parallel to the direction it enters. Practically, it is difficult to increase the warp angle on a single roller very much more than this.
  • Arrangement B illustrates a way to double the net wrap angle to a net 360 degrees by using a pair of rollers. This is known as the classic “S” wrap for driving a web system using rollers.
  • the total wrap angle on the two rollers can be increased significantly beyond 360 degrees by rotating the rollers about the center point of dashed line 8 by some angle ⁇ .
  • a maximum wrap angle of nearly 270 degrees on each roller occurs just before the rotated rollers touch the entering or exiting web, and the rollers themselves are brought together so that they nearly touch.
  • FIG. 4 shows a cross sectional schematic layout of a simple web handling system for some manufacturing operation.
  • Web 1 from a payout roll of material 9 is transported over roller 10 and through region 11 where some type of manufacturing operations takes place. Then the web goes over roller 12 and is rewound on takeup roll 13 . Payout and take-up rolls 9 and 13 are driven, and rollers 10 and 12 are idlers.
  • the wrap angle ⁇ on the rollers is rather small, and it may be at least inconvenient and certainly more expensive to arrange the system in a way that makes the angle significantly larger.
  • FIG. 5 a A drum coating architecture is shown in FIG. 5 a .
  • a driven drum 14 is used to support and transport web substrate 1 while it is coated at various types of coating stations 15 arrayed around the circumference of the drum.
  • the drum is often heated or cooled to provide desired web process conditions.
  • Rollers 16 are known in the trade as “lay-on rollers” which are not driven, but have a large wrap angle with the web. Normally they are fitted with load cells which measure the tension forces in the web.
  • Rollers 17 are simple idle rollers.
  • Driven payout and takeup rolls of web material 9 and 13 receive feedback tension information from the load cells and adjust their response to maintain a selected tension in the web.
  • a major problem with this classic setup can occur when the substrate and/or the coating is sensitive to defects that can be produced by the contact between the lay-on rollers and the coated side of the web.
  • FIG. 5 b One way to avoid the contact with the coated side of the web is shown in FIG. 5 b .
  • the lay-on rollers are removed, and repositioned fixed rollers 17 redefine the geometry of the web with respect to drum 14 .
  • the two unavoidable consequences of this arrangement is first the loss of some coating area around the drum, so not as many coating stations 15 can be used.
  • the wrap angle on rollers 17 is small, which can lead to slippage and false reading from load cells fitted to them.
  • the wrap angle on rollers 17 can be increased by moving them to positions fairly distant and above the respective payout and takeup rolls, but the geometry becomes complicated by the changing sizes of the substrate rolls during coating, and the machine dimensions become larger making it more expensive.
  • An aspect of the invention provides a magnetically enhanced roller for improved handling of thin foil magnetic substrates.
  • the roller comprises a rotatably fixed shaft and a sleeve circumscribing the rotatably fixed shaft.
  • the sleeve can be configured to rotate about (e.g., around) the shaft with the aid of bearings.
  • the roller can include an array of magnets adjacent to the shaft.
  • the array of magnets can be oriented so as to provide magnetic field lines along a direction orthogonal to the rotatably fixed bearing shaft.
  • the roller includes a pole piece that can include an individual magnet of the array of magnets attached thereto.
  • Such a roller can provide greater contact friction with a substrate (e.g., substrate web) at small wrap angles than that which may occur for conventional rollers.
  • FIG. 6 is a cross sectional view of a roller that has been magnetically enhanced it for use with thin magnetic foil substrates, such as steel or other ferromagnetic materials (e.g., iron, nickel, cobalt, rare earth metals).
  • the roller comprises a shaft or tube (dashed circle) 4 and sleeve 2 .
  • the roller can be similar to that shown in FIG. 2 , where the shaft 4 is held fixed while the sleeve 2 is allowed to rotate around the shaft on bearings (not shown in this figure).
  • the sleeve 2 can rotate about the shaft 4 at a rate of at least about 1 revolution per minute (rpm), 2 rpm, 3 rpm, 4 rpm, 5 rpm, 6 rpm, 7 rpm, 8 rpm, 9 rpm, 10 rpm, 20 rpm, 30 rpm, 40 rpm, 50 rpm, 60 rpm, 70 rpm, 80 rpm, 90 rpm, 100 rpm, 500 rpm, or 1000 rpm.
  • rpm revolution per minute
  • the sleeve 2 can be heated with the aid of resistive heating elements (not shown). In some cases, the sleeve can be cooled with the aid of a cooling system (not shown).
  • the shaft 4 can include three rows of magnets 18 attached along the length (orthogonal to the plane of drawing) of the roller, or at least of sufficient length to cover the width of the web 1 .
  • the poles of the magnets are inverted from one row to the next as indicated by the north (N) and south (S) nomenclature. In some cases, the poles may be inverted from the way they are shown in FIG. 6 .
  • Sleeve 2 can be made from a non-magnetic material so that the magnetic lines of force 19 can penetrate the sleeve with little attenuation and couple into magnetic web 1 .
  • Suitable materials that may be used to form the sleeve 2 include, without limitation, copper, molybdenum, chromium, gold, silver, platinum, aluminum, steel, stainless steel, and combinations thereof.
  • the sleeve is formed of 300 series stainless steel.
  • the magnetic field generated by the magnets attracts the web 1 towards the sleeve 2 .
  • Any extra frictional force between the web 1 and sleeve 2 created by the magnetic attraction may be sufficient to allow a small wrap angle roller to be used as a driver or load cell roller in various web handling situations, where it may not function as such otherwise.
  • the magnetic roller may also be used in a static mode if desired, with additional frictional drag being supplied by the magnetic fields.
  • the magnets 18 can extend radially outward from the shaft 4 of the roller.
  • the magnets 18 are disposed with their poles in an alternating fashion.
  • a first magnet is disposed with its south pole adjacent to the shaft 4 and its north pole adjacent to the sleeve 2
  • a second magnet adjacent to the first magnet is disposed with its north pole adjacent to the shaft 4 and its south pole adjacent to the sleeve 2
  • a third magnet adjacent to the second magnet is disposed with its north pole adjacent to the sleeve 2 and its south pole adjacent to the shaft 4 .
  • the poles of some of the magnets can be aligned.
  • the first and second magnets can have their north poles adjacent to the shaft 4 and their south poles adjacent to the sleeve 2 , or their south poles adjacent to the shaft 4 and their north poles adjacent the sleeve 2 .
  • the third magnet can have its north and south poles disposed in an opposite configuration in relation to the first and second magnets. For example, if the first and second magnets have their north poles disposed adjacent to the sleeve 2 , the third magnet can have its north pole disposed adjacent to the shaft 4 and its south pole disposed adjacent to the sleeve 2 .
  • the roller can have n magnets, wherein ‘n’ is greater than or equal to 2.
  • n can be greater than or equal to 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800, 900, or 1000. If n is equal to 2, then adjacent magnets may have their poles disposed in an anti-parallel configuration (i.e., north adjacent to south).
  • n-1 magnets may have their poles in a parallel configuration (i.e., north adjacent to north, south adjacent to south), while at least 1 of the n magnets may have its pole oriented in an anti-parallel configuration with respect to the n-1 magnets.
  • the magnets 18 do not contact the sleeve 2 .
  • the roller may include a gap between an individual magnet 18 and the sleeve 2 .
  • the gap has a width less than or equal to about 6 inches, 5 inches, 4 inches, 3 inches, 2 inches, 1 inch, 0.5 inches, 0.1 inches, 0.01 inches, 0.001 inches, 0.0001 inches, or 0.00001 inches.
  • the roller has 2, or 3, or 4, or 5, or 6, or 7, or 8, or 9, or 10, or more magnets.
  • the magnets may be distributed as desired to effect a predetermined distribution of magnetic field lines 19. While the roller includes three rows of magnets 18, the roller can include at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20, 25, 30, 35, 40, 45, 50, 100, 200, 300, 400, 500, or 1000 magnets. Adjacent magnets may be oriented so as to have poles aligned oppositely in relation to one another.
  • Modern magnets made from high energy density magnetic materials may have form factors such that the thickness in the magnetized direction is substantially equal to the width.
  • the pole piece can be formed of a magnetic material (e.g., steel, such as low carbon steel). The pole piece can also permit a smoothing of an otherwise non-uniform magnetic field. FIG.
  • FIG. 7 shows a cross sectional view of a magnetically enhanced roller where semi-circular pole piece 20 is arrayed with several rows of high energy density magnets 21 .
  • the pole piece 20 may be cylindrical along a direction orthogonal to the plane of the page of the figure.
  • the magnetic sense alternates with each row, as described elsewhere herein, and inversion of all the magnets may yield the same functionality.
  • the array can be rigidly (or fixedly) attached to shaft 4 , and roller sleeve 2 rotates around the fixed array as web 1 is transported.
  • This semi-circular array of magnets may be combined with or modified by the flat array of magnets described in U.S. Patent Publication No. 2010/0266810 (“Magnetic Hold-Down for Foil Substrate Processing”), which is entirely incorporated herein by reference.
  • the magnetic array is shown to extend over about half of the circumference of the roller, while the wrap angle of the web is substantially less.
  • Magnetic flux 19 can couple to the magnetic web substrate over some of the region where the web does not touch the roller.
  • various array sizes in relation to the wrap angle may be used.
  • the array in some cases is larger than the wrap angle. In some situations, the array size is less than or equal to about half the circumference of the roller.
  • individual magnets of the array of magnets are in contact with the sleeve and the roller (shaft, array and sleeve) rotate as a single unit.
  • the array of magnets can be radially disposed around a substantial portion (e.g., 360°) of the roller.
  • a roller system can include multiple rollers.
  • a roller system such as that illustrated in any of FIG. 1 , FIG. 2 , FIG. 3 , FIG. 4 , FIG. 5 a or FIG. 5 b , comprises rollers as described in the context of FIG. 6 or FIG. 7 .
  • a roller system can include a single roller (e.g., the roller of FIG. 6 or FIG. 7 ), or multiple rollers, each of which plurality of rollers may be as described in the context of FIG. 6 or FIG. 7 .
  • Rollers and roller systems of the disclosure may be combined with or modified by other devices or systems, such as, for example, those described in U.S. Pat. Nos. 4,047,609, 4,982,691, 7,106,011, 7,352,983, and 7,459,820, which patents are entirely incorporated herein by reference.

Landscapes

  • Rolls And Other Rotary Bodies (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
US14/238,177 2011-08-24 2012-08-23 Substrate rollers Abandoned US20150041514A1 (en)

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US14/238,177 US20150041514A1 (en) 2011-08-24 2012-08-23 Substrate rollers
PCT/US2012/052159 WO2013028925A1 (en) 2011-08-24 2012-08-23 Substrate rollers

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JP (1) JP2014528881A (de)
KR (1) KR20140068081A (de)
CN (1) CN103889867B (de)
IN (1) IN2014CN02081A (de)
MX (1) MX2014002172A (de)
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WO (1) WO2013028925A1 (de)

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CN108326504A (zh) * 2018-05-15 2018-07-27 芜湖君如保温材料有限公司 一种水箱的焊接平台
CN112639139A (zh) * 2018-09-07 2021-04-09 安赛乐米塔尔公司 磁性冷却辊
US20220267113A1 (en) * 2021-02-11 2022-08-25 Valmet Technologies Oy Brake of an Idler Roll of a Fiber Web Machine, in particular of a Slitter-winder

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CN104609128A (zh) * 2014-12-09 2015-05-13 马宁 一种用于传送带的辅助滚轴
FR3055323B1 (fr) * 2016-08-30 2020-06-12 Spoolex Procede et installation de convoyage a grande vitesse d'une bande ou nappe souple a faible tension
CN109878987A (zh) * 2019-03-01 2019-06-14 鸿达磁健康科技有限公司 一种传送带

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US4982691A (en) * 1988-04-05 1991-01-08 Sharp Kabushiki Kaisha Developing device for electrophotographic apparatus having magnet rollers
US5374313A (en) * 1992-06-24 1994-12-20 Energy Conversion Devices, Inc. Magnetic roller gas gate employing transonic sweep gas flow to isolate regions of differing gaseous composition or pressure
JPH1017184A (ja) * 1996-07-01 1998-01-20 Nippon Steel Corp 鋼帯の搬送ロール
JPH10230321A (ja) * 1997-02-20 1998-09-02 Toshiba Corp 帯状体の切断加工装置
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EP1556902A4 (de) * 2002-09-30 2009-07-29 Miasole Herstellungsvorrichtung und verfahren zur produktion von dünnfilmsolarzellen in grossem massstab
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Publication number Priority date Publication date Assignee Title
CN108326504A (zh) * 2018-05-15 2018-07-27 芜湖君如保温材料有限公司 一种水箱的焊接平台
CN112639139A (zh) * 2018-09-07 2021-04-09 安赛乐米塔尔公司 磁性冷却辊
US20220267113A1 (en) * 2021-02-11 2022-08-25 Valmet Technologies Oy Brake of an Idler Roll of a Fiber Web Machine, in particular of a Slitter-winder
US11970352B2 (en) * 2021-02-11 2024-04-30 Valmet Technologies Oy Brake of an idler roll of a fiber web machine, in particular of a slitter-winder

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EP2748090A4 (de) 2015-04-29
WO2013028925A1 (en) 2013-02-28
EP2748090A1 (de) 2014-07-02
KR20140068081A (ko) 2014-06-05
MX2014002172A (es) 2015-01-22
IN2014CN02081A (de) 2015-05-29
CN103889867A (zh) 2014-06-25
JP2014528881A (ja) 2014-10-30
SG2014013213A (en) 2014-07-30
CN103889867B (zh) 2016-03-16

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