US3772173A - Electroconductive paper - Google Patents

Electroconductive paper Download PDF

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Publication number
US3772173A
US3772173A US00080549A US3772173DA US3772173A US 3772173 A US3772173 A US 3772173A US 00080549 A US00080549 A US 00080549A US 3772173D A US3772173D A US 3772173DA US 3772173 A US3772173 A US 3772173A
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United States
Prior art keywords
paper
electroconductive
potential
support
resistance
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
US00080549A
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English (en)
Inventor
S Matsumoto
S Honjo
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Application granted granted Critical
Publication of US3772173A publication Critical patent/US3772173A/en
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/02—Sensitising, i.e. laying-down a uniform charge

Definitions

  • This invention relates to a method of preparing electroconductive paper and more specifically to a process for producing paper adaptable for use in electrophotography, and in electrostatic and electroconductive recording.
  • Ordinary paper which consists primarily of cellulose fibers, fillers such as clay, and hydrophobic sizing agents such as rosin, generally exhibits a relatively high electrical resistance.
  • the value of this resistance generally varies considerably with ambient conditions, specifically the relative humidity of the atmosphere. However, in most instances the resistance value is considered too high to utilize the paper for electroconductive purposes.
  • Electroconductive short circuit paths are made throughout the paper support by making pinholes at equal intervals on a sheet of paper and filling the resulting pin holes with a carbon paint.
  • a further object of this invention is to provide an expedient, readily adaptable technique for converting an ordinarily prepared and available paper substrate for use where low electrical resistance is required.
  • Still a further object of this invention is to pro vide a process for producing electroconductive paper adapted for use as an electrostatic and electroconductive recording material.
  • Another object of this invention is to provide an electroconductive paper support having sufficiently high electroconductivity in the thickness direction.
  • FIG. 1 represents a schematic drawing demonstrating a specific embodiment of the present invention.
  • FIG. 2 is a schematic drawing representing an alternate process implementing the concept of the present invention.
  • rollers 22 and 23 are driven by any suitable driving means in the direction indicated by the arrows 27 to transport the paper support 21 in the direction indicated by the arrow 26.
  • the roller 22 is electrocon ductive and is generally made up of a metallic material such as aluminum, steel, copper or other similar material.
  • the roller 23 is also composed of an electroconductive component such as is described above.
  • a semi-conductive peripheral portion 24 comprising a semi-conductive material, such as semiconductive rubber, polystyrene, polytetrachloroethylene, polyvinylfluoride, polyethyleneterephthalate, and cellulose acetate is provided.
  • a semi-conductive material such as semiconductive rubber, polystyrene, polytetrachloroethylene, polyvinylfluoride, polyethyleneterephthalate, and cellulose acetate.
  • any suitable semi-conductive material having a resistivity of about 10 ohms-centimeter or greater is desired.
  • a resistivity between about 10 to 10 ohms-centimeter is preferred to assure obtaining the desired effect.
  • Power source 25 supplies the potential necessary to bring about the dielectric breakdown of the paper support which generally will be in the magnitude of from about I to 5 kilovolts.
  • the high electrical potential is applied across the roller configuration to bring about local dielectric breakdown of the respective paper support material thereby producing the above discussed black dots.
  • the presence of the semi-conductive material has been observed to prevent the lowering of potential during the formation of the selective black dots or the dielectric breakdown of the paper support material.
  • the passing of the paper support through the rotating roller electrodes allows for the uniform production of the carbonized areas throughout the entire paper support.
  • the high potential source 25 may supply either direct or alternating current.
  • the amount of potential applied and final value of resistance obtained will be determined by the particular species of paper worked on and the translating speed at which the paper passes through the rollers.
  • a paper support 31 is subjected to a high electric potential by a group of lever electrodes 33.
  • the paper. support 31 is translated by means of a roller system (not shown) in the direction of arrow 38.
  • the electrodes 33 are preferably provided in the transversal direction with respect to the paper support with spacing intervals between about 0.2 to 3 centimeters.
  • the electrodes 33 are pressed against the paper support 31 by means of a flexible elctroconductive support means 34 which are in turn mounted on an insulating support 35 and connected to a high potential source 37 through a resistance 36.
  • the circuit is completed by connecting power source 37 to a rear electrode 32 which, in combination with electrodes 33, holds the paper support in position and produces the desired effect.
  • Dielectric breakdown caused by the applied electric potential to the paper support forms the characteristic black dots.
  • the resistance element 36 present in the system are utilized as a control.
  • the resistance values are increased when the potential supply from the electric source is high and conversely it is lowered when necessary such as when the potential applied is decreased or when the translating speed for the paper support is rapid.
  • the potential of the power source 37 and the resistance values 36 will be determined appropriately according to the quality of the support paper being treated as well as the translating speed of the support paper since excessively high potential or excessively low resistance will result in the formation of a hole in the support.
  • the potential is excessively low or resistance excessively high the effect desired from the discharge will not be realized or the density produced by thedischarge will be lowered to an undesirable level. Resistance levels ranging from about 10 to about 10 ohms-centimeter have produced satisfactory results.
  • a method for preparing electroconductive paper adapted for use as an electrostatic and electroconduc' tive recording material comprising providing a paper substrate, and applying a potential of from 1-5 kv to said paper substrate in the form of an electrical discharge thereby bringing about a local dielectric breakdown and the formation of densely distributed microscopic carbonized electroconductive paths manifested in the form of black dots which penetrate through said paper in the thickness direction.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paper (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
US00080549A 1969-12-04 1970-10-14 Electroconductive paper Expired - Lifetime US3772173A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44097341A JPS4828697B1 (enrdf_load_stackoverflow) 1969-12-04 1969-12-04

Publications (1)

Publication Number Publication Date
US3772173A true US3772173A (en) 1973-11-13

Family

ID=14189761

Family Applications (2)

Application Number Title Priority Date Filing Date
US00080549A Expired - Lifetime US3772173A (en) 1969-12-04 1970-10-14 Electroconductive paper
US93316A Expired - Lifetime US3689767A (en) 1969-12-04 1970-11-27 Method and apparatus for uniformly charging the surface of an insulating member

Family Applications After (1)

Application Number Title Priority Date Filing Date
US93316A Expired - Lifetime US3689767A (en) 1969-12-04 1970-11-27 Method and apparatus for uniformly charging the surface of an insulating member

Country Status (3)

Country Link
US (2) US3772173A (enrdf_load_stackoverflow)
JP (1) JPS4828697B1 (enrdf_load_stackoverflow)
CA (1) CA925929A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028551A (en) * 1975-10-17 1977-06-07 Champion International Corporation Apparatus and method for corona discharge priming a dielectric web
US6007784A (en) * 1997-07-11 1999-12-28 3Dt, Inc. Electric discharge surface treating electrode and system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4937541B1 (enrdf_load_stackoverflow) * 1970-12-30 1974-10-09

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453484A (en) * 1946-05-31 1948-11-09 Rca Corp Electrolytic signal recording
US2662803A (en) * 1949-06-29 1953-12-15 Faximile Inc Recording method and apparatus
US2707744A (en) * 1953-08-05 1955-05-03 Meaker John Wesley Apparatus for perforating paper and other sheet materials
US2977475A (en) * 1958-04-30 1961-03-28 Inst Textile De France Method of and apparatus for processing textile fibre materials
US3008888A (en) * 1957-07-04 1961-11-14 Fujimoto Shigenobu Method for the production of processed papers
US3285696A (en) * 1960-08-25 1966-11-15 Tokai Denkyoku Seizo Kabushiki Method for the preparation of flexible carbon fibre
US3399252A (en) * 1966-04-15 1968-08-27 Air Force Usa Method and apparatus for manufacture of high strength and high modulus carbon filaments
US3540848A (en) * 1967-07-12 1970-11-17 Hitco Continuous process for preparing electrically conductive carbonaceous fibers
US3553000A (en) * 1969-07-01 1971-01-05 Deering Milliken Res Corp Process for durably setting a desired configuration in a cellulosic material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL294832A (enrdf_load_stackoverflow) * 1962-07-20
US3335322A (en) * 1966-05-06 1967-08-08 Borg Warner Charge head array for electrostatic printing system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453484A (en) * 1946-05-31 1948-11-09 Rca Corp Electrolytic signal recording
US2662803A (en) * 1949-06-29 1953-12-15 Faximile Inc Recording method and apparatus
US2707744A (en) * 1953-08-05 1955-05-03 Meaker John Wesley Apparatus for perforating paper and other sheet materials
US3008888A (en) * 1957-07-04 1961-11-14 Fujimoto Shigenobu Method for the production of processed papers
US2977475A (en) * 1958-04-30 1961-03-28 Inst Textile De France Method of and apparatus for processing textile fibre materials
US3285696A (en) * 1960-08-25 1966-11-15 Tokai Denkyoku Seizo Kabushiki Method for the preparation of flexible carbon fibre
US3399252A (en) * 1966-04-15 1968-08-27 Air Force Usa Method and apparatus for manufacture of high strength and high modulus carbon filaments
US3540848A (en) * 1967-07-12 1970-11-17 Hitco Continuous process for preparing electrically conductive carbonaceous fibers
US3553000A (en) * 1969-07-01 1971-01-05 Deering Milliken Res Corp Process for durably setting a desired configuration in a cellulosic material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028551A (en) * 1975-10-17 1977-06-07 Champion International Corporation Apparatus and method for corona discharge priming a dielectric web
US6007784A (en) * 1997-07-11 1999-12-28 3Dt, Inc. Electric discharge surface treating electrode and system

Also Published As

Publication number Publication date
CA925929A (en) 1973-05-08
US3689767A (en) 1972-09-05
JPS4828697B1 (enrdf_load_stackoverflow) 1973-09-04

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