US3268766A - Apparatus for removal of electric charges from dielectric film surfaces - Google Patents

Apparatus for removal of electric charges from dielectric film surfaces Download PDF

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Publication number
US3268766A
US3268766A US342378A US34237864A US3268766A US 3268766 A US3268766 A US 3268766A US 342378 A US342378 A US 342378A US 34237864 A US34237864 A US 34237864A US 3268766 A US3268766 A US 3268766A
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US
United States
Prior art keywords
web
travelling
charges
gas
tubular member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US342378A
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English (en)
Inventor
Amos Stephen Earl
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US342378A priority Critical patent/US3268766A/en
Priority to NL6501316A priority patent/NL6501316A/xx
Priority to GB4738/65A priority patent/GB1099832A/en
Priority to DEP35995A priority patent/DE1291425B/de
Priority to BE659210D priority patent/BE659210A/xx
Priority to FR4216A priority patent/FR1423438A/fr
Priority to LU47912D priority patent/LU47912A1/xx
Application granted granted Critical
Publication of US3268766A publication Critical patent/US3268766A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/32—Coiling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S174/00—Electricity: conductors and insulators
    • Y10S174/13—High voltage cable, e.g. above 10kv, corona prevention
    • Y10S174/14—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding
    • Y10S174/17—High voltage cable, e.g. above 10kv, corona prevention having a particular cable application, e.g. winding in an electric power conversion, regulation, or protection system

Definitions

  • FIG. 2 ' s APPARATUS FOR REMOVAL OF ELECTRIC CHARGES FROM DIELECTRIC FILM SURFACES Filed Feb, 4, 1964 FIG. 2
  • This problem has been increasingly acute in the manufacture and handling of thin gauge films of high resistivity organic polymers. The surface charges often are so great that extremely high potentials are reached which coupled the very small mass of the film, makes handling of the web a virtual impossibility. Further, accumulation of dust particles on thermoplastic webs during processing permits the particles to be embedded, or cause embossing, and thereby impairs the clarity and utility of the product.
  • Grounded idler (undriven) rolls as a means of removing charges as they accumulate are not satisfactory, since elongation of thin gauge films would occur, as well as slippage which would mar the surface.
  • Grounded driven rolls as the many points where it may be desirable to eliminate static charges would be prohibitively expensive, since the peripheral speed must be regulated to correspond precisely to the speed of the running web.
  • grounded rolls or bars are usually not completely effective in removing surface charges; these charges are reduoed to the extent where they possess a potential of the order of 1000 volts, but this residual charge still causes dust particles to cling to the film and causes poor running characteristics on slitting and converting machinery.
  • a number of non-contacting devices have been employed, in the prior art, for removal of static charges, but for one reason or another these have not been altogether satisfactory or universally adaptable.
  • -Most of these involve the passage of the web through a cloud of gaseous ions which are produced by radiation from a radioactive material or exposure to an ionizing electrical discharge.
  • the drawbacks of these are cost, fire and radiation hazard, and the adverse effects on the film surface resulting from the active gases produced by electrical discharges.
  • One example of difliculties in discharging static electricity from the film by ions from an electrical discharge is the difficulty of control.
  • the magnitude of the charge on the film is a function of atmospheric conditions, e.g., relative humidity, etc.; as this charge varies, the concentration of ions in the air surrounding the film should be controlled so as to assure discharge without depositing a charge of the opposite sign on the film. This necessitates control apparatus which adds to the cost of each discharge element.
  • an object of this invention to provide simple apparatus for the removal of static electricity charges from dielectric web surfaces, which apparatus is free of the foregoing drawbacks. It is a further object of this invention to provide apparatus effective to remove contaminating dust as well as accumulated static charges from the surface of dielectric webs. Still another object is to provide apparatus for smoothing a thin dielectric web and producing an improved roll structure.
  • a stationary web guide operative to remove accumulated charges of static electricity from the surface of the travelling web comprising a close tubular member disposed transversely of and below or adjacent the travelling web, and having an electrically conductive Wall pervious to gas in the area thereof immediately adjacent the travelling web, means for continuously feeding gas under pressure to the interior of said tubular member whereby gas is continuously forced thru said pervious area to maintain a blanket of gas of predetermined thickness between the surface of the tubular member and the web travelling thereover, and a low resistance electrical conductor connecting said electrically conductive wall to an earth ground.
  • FIGURE 1 shows in perspective the apparatus of this invention positioned with respect to the travelling web
  • FIGURE 2 is a cross-sectional view of the tubular member on the line 22 of FIGURE 1.
  • web 11 partially wraps tubular web guide 12 which is fixed and non-rotating.
  • the portion of web guide 12 adjacent web 11 is provided with a sintered metal face 13.
  • the walls of the tubular guide are impervious to gas except for porous section 13 and air inlet 15 which is coupled to flexible conduit 16, which is in turn coupled to a source of compressed air (not shown).
  • Ground wire 17 couples the porous wall 13 of the guide to ground 18. It is essential that section 13 be of an electrically conductive material.
  • Sintered bronze which is gas pervious is a preferred material for the wall 13; however, other porous sintered metals or porous carbons are useful.
  • a critical feature of this invention is the manner of grounding, and the necessity for an extremely low resistance pathway from the mandrel to a good earth ground.
  • Ground wire 17 should be of at least No. B and S copper for distances of approximately 50 feet or less; of course for' greater distances, a larger size wire would be required.
  • Earth ground 18 may be a water pipe to which the ground wire is attached. In any event, as stated above, this ground should provide a low resistance path to the moist earth, so as to conduct a relatively large current driven by a relatively low potential.
  • the guide structure is supported on the appropriate machinery by trunnions 19 and 20 at each end and brackets (not shown).
  • Emission of air from the periphery of a sintered metal tubular guide which is grounded by being attached to the framework of the machine reduces this potential to values of the order of 1,000 volts, but this reduction is not adequate to permit easy removal of clinging dust particles, nor to materially improve poor handling properties resulting from static charges.
  • the coupling of the sintered metal gas pervious wall to a good ground, such as a water supply line which passes through the ground, by means of a heavy ground wire as described above, reduced the voltage on the film to zero and caused dust particles to be propelled from the film surface and cling to nearby framework where they could be drawn away by a vacuum duct which may be situated nearby for disposal of the dust.
  • the apparatus of this invention is especially useful in the production of thin gauge dielectric films, but it is also valuable in the production of fabrics and threads, especially those of synthetic fibers, which also have-low conductivity, whereby the initial hand is improved. Further, adapted to tape recorders and playback apparatus it improves the running qualities of tapes at high speeds. Modification of this apparatus will be apparent to those skilled in the art and yet still remain within the spirit of this invention; for example, in the production of threads the porous guide member should preferably be trough-shaped in cross-section, and for narrow width thin gauge film the guide should be provided with porous side flanges which would be operative to maintain the travelling film in alignment.
  • the apparatus of the present invention has advantages over previously known devices for discharge of webs in three aspects, cost, convenience and safety.
  • the ability to function without the consumption of power or the use of radioactive materials greatly reduces the initial cost of the apparatus. Further, without power consumption the operating cost is materially reduced.
  • this apparatus can be positioned on virtually any type of equipment and at virtually any location. For example, it may be employed at any location on a film manufacturing line where the web may be wrapped over one mandrel, or on alternate sides over two or more.
  • This apparatus also removes longitudinal wrinkles from running webs.
  • This apparatus is especially adapted to slitting machinery, where rolling and unrolling cause large accumulations of static electricity.
  • This apparatus is especially advantageous in equipment for high speed handling of recording tapes, in that surface charges are removed without the adverse eifects of electric or radioactive discharges to produce electrical interference. And finally, this apparatus is particularly useful in locations where electrical discharge methods present a hazard in connection with solvents or other combustibles. This apparatus removes charges by innocuous means before sparking or other breakdown can occur. The ability to function without radioactive materials adds to the safety, since radiation hazards do not exit.
  • a stationary web guide operative to remove accumulated charges of static electricity from the surface of the travelling web comprising a closed tubular member disposed transversely of and below the travelling web, and having an electrically conductive wall pervious to gas in the area thereof immediately adjacent the travelling web, means for continuously feeding gas under pressure to the interior of said tubular member whereby gas is continuously forced thru said pervious area and against said web to maintain a blanket of gas of predetermined thickness between the surface of the tubular member and the web travelling thereover, and a low resistance electrical conductor connecting said electrically conductive wall to an earth ground.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Elimination Of Static Electricity (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Cleaning In General (AREA)
US342378A 1964-02-04 1964-02-04 Apparatus for removal of electric charges from dielectric film surfaces Expired - Lifetime US3268766A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US342378A US3268766A (en) 1964-02-04 1964-02-04 Apparatus for removal of electric charges from dielectric film surfaces
NL6501316A NL6501316A (en, 2012) 1964-02-04 1965-02-02
GB4738/65A GB1099832A (en) 1964-02-04 1965-02-03 Apparatus for removal of electric charges from the surfaces of webs of dielectric materials
DEP35995A DE1291425B (de) 1964-02-04 1965-02-03 Vorrichtung zur Beseitigung elektrostatischer Ladungen einer kontinuierlich bewegten Bahn aus dielektrischem Material
BE659210D BE659210A (en, 2012) 1964-02-04 1965-02-03
FR4216A FR1423438A (fr) 1964-02-04 1965-02-03 Appareil pour éliminer les charges électriques de la surface de pellicules diélectriques
LU47912D LU47912A1 (en, 2012) 1964-02-04 1965-02-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US342378A US3268766A (en) 1964-02-04 1964-02-04 Apparatus for removal of electric charges from dielectric film surfaces

Publications (1)

Publication Number Publication Date
US3268766A true US3268766A (en) 1966-08-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US342378A Expired - Lifetime US3268766A (en) 1964-02-04 1964-02-04 Apparatus for removal of electric charges from dielectric film surfaces

Country Status (7)

Country Link
US (1) US3268766A (en, 2012)
BE (1) BE659210A (en, 2012)
DE (1) DE1291425B (en, 2012)
FR (1) FR1423438A (en, 2012)
GB (1) GB1099832A (en, 2012)
LU (1) LU47912A1 (en, 2012)
NL (1) NL6501316A (en, 2012)

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2114846A1 (de) * 1970-03-27 1971-10-21 Du Pont Verfahren und Vorrichtung zum Abschrecken einer Bahn aus thermo plastischem Schmelzfluss
US3681779A (en) * 1970-07-31 1972-08-01 Bausch & Lomb Apparatus for maintaining uniform paper tension in a graphical recording device
US4017575A (en) * 1972-03-08 1977-04-12 E. I. Du Pont De Nemours And Company Production of a flat thermoplastic film by passing the film over a bearing having a lubricating fluid on the surface thereof
US4392177A (en) * 1979-09-28 1983-07-05 Agfa-Gevaert Aktiengesellschaft Transporting roller for webs of photosensitive material or the like
US4481556A (en) * 1980-04-04 1984-11-06 Joseph J. Berke Computer terminal support and hand rest
US4482063A (en) * 1980-04-04 1984-11-13 Joseph J. Berke Computer terminal support and hand rest
US4482064A (en) * 1980-04-04 1984-11-13 Joseph J. Berke Computer terminal support and hand rest
US4913390A (en) * 1988-09-21 1990-04-03 Berke Joseph J Portable adjustable computer keyboard support and hand rest
USRE33556E (en) * 1980-04-04 1991-03-19 Computer terminal support and hand rest
US5036165A (en) * 1984-08-23 1991-07-30 General Electric Co. Semi-conducting layer for insulated electrical conductors
US5067046A (en) * 1984-08-23 1991-11-19 General Electric Company Electric charge bleed-off structure using pyrolyzed glass fiber
US5232141A (en) * 1989-11-01 1993-08-03 Basf Magnetics Gmbh Suction roller arrangement for transporting web-form material
US5400208A (en) * 1990-12-26 1995-03-21 Eastman Kodak Company Web edge discharging system
US5892499A (en) * 1996-08-17 1999-04-06 Vulk, Jr.; Joseph Patrick Forearm support for computer interface device
US6017006A (en) * 1990-10-04 2000-01-25 Alimed, Inc. Keyboard wrist rest
US6155557A (en) * 1998-02-04 2000-12-05 Ricoh Company, Ltd. Sheet feeding device
US6261437B1 (en) 1996-11-04 2001-07-17 Asea Brown Boveri Ab Anode, process for anodizing, anodized wire and electric device comprising such anodized wire
US6279850B1 (en) 1996-11-04 2001-08-28 Abb Ab Cable forerunner
US6357688B1 (en) 1997-02-03 2002-03-19 Abb Ab Coiling device
US6369470B1 (en) 1996-11-04 2002-04-09 Abb Ab Axial cooling of a rotor
US6368675B1 (en) 2000-04-06 2002-04-09 3M Innovative Properties Company Electrostatically assisted coating method and apparatus with focused electrode field
US6376775B1 (en) 1996-05-29 2002-04-23 Abb Ab Conductor for high-voltage windings and a rotating electric machine comprising a winding including the conductor
US6396187B1 (en) 1996-11-04 2002-05-28 Asea Brown Boveri Ab Laminated magnetic core for electric machines
US6417456B1 (en) 1996-05-29 2002-07-09 Abb Ab Insulated conductor for high-voltage windings and a method of manufacturing the same
US6429563B1 (en) 1997-02-03 2002-08-06 Abb Ab Mounting device for rotating electric machines
US6439497B1 (en) 1997-02-03 2002-08-27 Abb Ab Method and device for mounting a winding
US6465979B1 (en) 1997-02-03 2002-10-15 Abb Ab Series compensation of electric alternating current machines
US6475572B2 (en) 2000-04-06 2002-11-05 3M Innovative Properties Company Electrostatically assisted coating method with focused web-borne charges
US20020195897A1 (en) * 1996-05-29 2002-12-26 Mats Leijon Device in the stator of a rotating electric machine
US6525265B1 (en) 1997-11-28 2003-02-25 Asea Brown Boveri Ab High voltage power cable termination
US6525504B1 (en) 1997-11-28 2003-02-25 Abb Ab Method and device for controlling the magnetic flux in a rotating high voltage electric alternating current machine
US6569494B1 (en) * 2000-05-09 2003-05-27 3M Innovative Properties Company Method and apparatus for making particle-embedded webs
US6577487B2 (en) 1996-05-29 2003-06-10 Asea Brown Boveri Ab Reduction of harmonics in AC machines
US6646363B2 (en) 1997-02-03 2003-11-11 Abb Ab Rotating electric machine with coil supports
US6801421B1 (en) 1998-09-29 2004-10-05 Abb Ab Switchable flux control for high power static electromagnetic devices
US6822363B2 (en) 1996-05-29 2004-11-23 Abb Ab Electromagnetic device
US6828701B1 (en) 1997-02-03 2004-12-07 Asea Brown Boveri Ab Synchronous machine with power and voltage control
US6831388B1 (en) 1996-05-29 2004-12-14 Abb Ab Synchronous compensator plant
US6867674B1 (en) 1997-11-28 2005-03-15 Asea Brown Boveri Ab Transformer
US6873080B1 (en) 1997-09-30 2005-03-29 Abb Ab Synchronous compensator plant
US6885273B2 (en) 2000-03-30 2005-04-26 Abb Ab Induction devices with distributed air gaps
US6891303B2 (en) 1996-05-29 2005-05-10 Abb Ab High voltage AC machine winding with grounded neutral circuit
US6970063B1 (en) 1997-02-03 2005-11-29 Abb Ab Power transformer/inductor
US6972505B1 (en) 1996-05-29 2005-12-06 Abb Rotating electrical machine having high-voltage stator winding and elongated support devices supporting the winding and method for manufacturing the same
US6995646B1 (en) 1997-02-03 2006-02-07 Abb Ab Transformer with voltage regulating means
US7019429B1 (en) 1997-11-27 2006-03-28 Asea Brown Boveri Ab Method of applying a tube member in a stator slot in a rotating electrical machine
US7046492B2 (en) 1997-02-03 2006-05-16 Abb Ab Power transformer/inductor
US7045704B2 (en) 2000-04-28 2006-05-16 Abb Ab Stationary induction machine and a cable therefor
US7061133B1 (en) 1997-11-28 2006-06-13 Abb Ab Wind power plant
US7141908B2 (en) 2000-03-01 2006-11-28 Abb Ab Rotating electrical machine
DE112006001667B4 (de) 2005-06-22 2018-11-29 Smc Corp. Statikeliminator
CN113060586A (zh) * 2021-03-23 2021-07-02 安徽天顺环保过滤材料有限公司 一种纺织品加工用除静电装置及其实施方法

Citations (4)

* Cited by examiner, † Cited by third party
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US1251173A (en) * 1917-04-28 1917-12-25 Theodore J Beregh Jr Drying mechanism for printed matter.
US2576882A (en) * 1946-09-04 1951-11-27 Hartford Nat Band And Trust Co Device for conveying paper and similar substances
US3061940A (en) * 1958-08-22 1962-11-06 Du Pont Method and apparatus for heat transfer
US3065098A (en) * 1960-03-21 1962-11-20 Eastman Kodak Co Method for coating webs

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB804957A (en) * 1956-05-26 1958-11-26 Birmingham Small Arms Co Ltd Discharging static electricity from fluids
DE1027340B (de) * 1956-09-29 1958-04-03 Siemens Ag Vorrichtung zur Beseitigung elektrostatischer Aufladungen von Stoffbahnen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1251173A (en) * 1917-04-28 1917-12-25 Theodore J Beregh Jr Drying mechanism for printed matter.
US2576882A (en) * 1946-09-04 1951-11-27 Hartford Nat Band And Trust Co Device for conveying paper and similar substances
US3061940A (en) * 1958-08-22 1962-11-06 Du Pont Method and apparatus for heat transfer
US3065098A (en) * 1960-03-21 1962-11-20 Eastman Kodak Co Method for coating webs

Cited By (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2114846A1 (de) * 1970-03-27 1971-10-21 Du Pont Verfahren und Vorrichtung zum Abschrecken einer Bahn aus thermo plastischem Schmelzfluss
US3681779A (en) * 1970-07-31 1972-08-01 Bausch & Lomb Apparatus for maintaining uniform paper tension in a graphical recording device
US4017575A (en) * 1972-03-08 1977-04-12 E. I. Du Pont De Nemours And Company Production of a flat thermoplastic film by passing the film over a bearing having a lubricating fluid on the surface thereof
US4392177A (en) * 1979-09-28 1983-07-05 Agfa-Gevaert Aktiengesellschaft Transporting roller for webs of photosensitive material or the like
US4481556A (en) * 1980-04-04 1984-11-06 Joseph J. Berke Computer terminal support and hand rest
US4482063A (en) * 1980-04-04 1984-11-13 Joseph J. Berke Computer terminal support and hand rest
US4482064A (en) * 1980-04-04 1984-11-13 Joseph J. Berke Computer terminal support and hand rest
USRE33556E (en) * 1980-04-04 1991-03-19 Computer terminal support and hand rest
US5036165A (en) * 1984-08-23 1991-07-30 General Electric Co. Semi-conducting layer for insulated electrical conductors
US5067046A (en) * 1984-08-23 1991-11-19 General Electric Company Electric charge bleed-off structure using pyrolyzed glass fiber
US4913390A (en) * 1988-09-21 1990-04-03 Berke Joseph J Portable adjustable computer keyboard support and hand rest
US5232141A (en) * 1989-11-01 1993-08-03 Basf Magnetics Gmbh Suction roller arrangement for transporting web-form material
US6017006A (en) * 1990-10-04 2000-01-25 Alimed, Inc. Keyboard wrist rest
US5400208A (en) * 1990-12-26 1995-03-21 Eastman Kodak Company Web edge discharging system
US6919664B2 (en) 1996-05-29 2005-07-19 Abb Ab High voltage plants with electric motors
US6376775B1 (en) 1996-05-29 2002-04-23 Abb Ab Conductor for high-voltage windings and a rotating electric machine comprising a winding including the conductor
US20020195897A1 (en) * 1996-05-29 2002-12-26 Mats Leijon Device in the stator of a rotating electric machine
US6940380B1 (en) 1996-05-29 2005-09-06 Abb Ab Transformer/reactor
US6936947B1 (en) 1996-05-29 2005-08-30 Abb Ab Turbo generator plant with a high voltage electric generator
US6577487B2 (en) 1996-05-29 2003-06-10 Asea Brown Boveri Ab Reduction of harmonics in AC machines
US6906447B2 (en) 1996-05-29 2005-06-14 Abb Ab Rotating asynchronous converter and a generator device
US6972505B1 (en) 1996-05-29 2005-12-06 Abb Rotating electrical machine having high-voltage stator winding and elongated support devices supporting the winding and method for manufacturing the same
US6894416B1 (en) 1996-05-29 2005-05-17 Abb Ab Hydro-generator plant
US6417456B1 (en) 1996-05-29 2002-07-09 Abb Ab Insulated conductor for high-voltage windings and a method of manufacturing the same
US6891303B2 (en) 1996-05-29 2005-05-10 Abb Ab High voltage AC machine winding with grounded neutral circuit
US6831388B1 (en) 1996-05-29 2004-12-14 Abb Ab Synchronous compensator plant
US6822363B2 (en) 1996-05-29 2004-11-23 Abb Ab Electromagnetic device
US5892499A (en) * 1996-08-17 1999-04-06 Vulk, Jr.; Joseph Patrick Forearm support for computer interface device
US6261437B1 (en) 1996-11-04 2001-07-17 Asea Brown Boveri Ab Anode, process for anodizing, anodized wire and electric device comprising such anodized wire
US6396187B1 (en) 1996-11-04 2002-05-28 Asea Brown Boveri Ab Laminated magnetic core for electric machines
US6279850B1 (en) 1996-11-04 2001-08-28 Abb Ab Cable forerunner
US6369470B1 (en) 1996-11-04 2002-04-09 Abb Ab Axial cooling of a rotor
US6995646B1 (en) 1997-02-03 2006-02-07 Abb Ab Transformer with voltage regulating means
US6970063B1 (en) 1997-02-03 2005-11-29 Abb Ab Power transformer/inductor
US6646363B2 (en) 1997-02-03 2003-11-11 Abb Ab Rotating electric machine with coil supports
US7046492B2 (en) 1997-02-03 2006-05-16 Abb Ab Power transformer/inductor
US6357688B1 (en) 1997-02-03 2002-03-19 Abb Ab Coiling device
US6429563B1 (en) 1997-02-03 2002-08-06 Abb Ab Mounting device for rotating electric machines
US6465979B1 (en) 1997-02-03 2002-10-15 Abb Ab Series compensation of electric alternating current machines
US6828701B1 (en) 1997-02-03 2004-12-07 Asea Brown Boveri Ab Synchronous machine with power and voltage control
US6439497B1 (en) 1997-02-03 2002-08-27 Abb Ab Method and device for mounting a winding
US6873080B1 (en) 1997-09-30 2005-03-29 Abb Ab Synchronous compensator plant
US7019429B1 (en) 1997-11-27 2006-03-28 Asea Brown Boveri Ab Method of applying a tube member in a stator slot in a rotating electrical machine
US7061133B1 (en) 1997-11-28 2006-06-13 Abb Ab Wind power plant
US6867674B1 (en) 1997-11-28 2005-03-15 Asea Brown Boveri Ab Transformer
US6525265B1 (en) 1997-11-28 2003-02-25 Asea Brown Boveri Ab High voltage power cable termination
US6525504B1 (en) 1997-11-28 2003-02-25 Abb Ab Method and device for controlling the magnetic flux in a rotating high voltage electric alternating current machine
US6155557A (en) * 1998-02-04 2000-12-05 Ricoh Company, Ltd. Sheet feeding device
US6801421B1 (en) 1998-09-29 2004-10-05 Abb Ab Switchable flux control for high power static electromagnetic devices
US7141908B2 (en) 2000-03-01 2006-11-28 Abb Ab Rotating electrical machine
US6885273B2 (en) 2000-03-30 2005-04-26 Abb Ab Induction devices with distributed air gaps
US6475572B2 (en) 2000-04-06 2002-11-05 3M Innovative Properties Company Electrostatically assisted coating method with focused web-borne charges
US6716286B2 (en) 2000-04-06 2004-04-06 3M Innovative Properties Company Electrostatically assisted coating method and apparatus with focused electrode field
US6666918B2 (en) 2000-04-06 2003-12-23 3M Innovative Properties Company Electrostatically assisted coating apparatus with focused web charge field
US6368675B1 (en) 2000-04-06 2002-04-09 3M Innovative Properties Company Electrostatically assisted coating method and apparatus with focused electrode field
US7045704B2 (en) 2000-04-28 2006-05-16 Abb Ab Stationary induction machine and a cable therefor
US6834612B2 (en) 2000-05-09 2004-12-28 3M Innovative Properties Company Method and apparatus for making particle-embedded webs
US6569494B1 (en) * 2000-05-09 2003-05-27 3M Innovative Properties Company Method and apparatus for making particle-embedded webs
US20030129302A1 (en) * 2000-05-09 2003-07-10 3M Innovative Properties Company Method and apparatus for making particle-embedded webs
DE112006001667B4 (de) 2005-06-22 2018-11-29 Smc Corp. Statikeliminator
CN113060586A (zh) * 2021-03-23 2021-07-02 安徽天顺环保过滤材料有限公司 一种纺织品加工用除静电装置及其实施方法

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DE1291425B (de) 1969-03-27
LU47912A1 (en, 2012) 1965-08-04
NL6501316A (en, 2012) 1965-08-05
GB1099832A (en) 1968-01-17
FR1423438A (fr) 1966-01-03
BE659210A (en, 2012) 1965-08-03

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