US3075859A - Copy sheet for electrostatic printing - Google Patents

Copy sheet for electrostatic printing Download PDF

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Publication number
US3075859A
US3075859A US79449159A US3075859A US 3075859 A US3075859 A US 3075859A US 79449159 A US79449159 A US 79449159A US 3075859 A US3075859 A US 3075859A
Authority
US
United States
Prior art keywords
base sheet
copy
paper base
weight
sheet
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
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English (en)
Inventor
Earl B Relph
Henry A Dahl
Christiansen Robert
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.)
AB Dick Co
Original Assignee
AB Dick 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
Priority to BE587766D priority Critical patent/BE587766A/xx
Priority to NL248586D priority patent/NL248586A/xx
Application filed by AB Dick Co filed Critical AB Dick Co
Priority to US79449159 priority patent/US3075859A/en
Priority to GB472060A priority patent/GB949605A/en
Priority to FR818587A priority patent/FR1248378A/fr
Priority to DE19601423733 priority patent/DE1423733A1/de
Application granted granted Critical
Publication of US3075859A publication Critical patent/US3075859A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/02—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused
    • H01J31/06—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused with more than two output electrodes, e.g. for multiple switching or counting
    • H01J31/065—Cathode ray tubes; Electron beam tubes having one or more output electrodes which may be impacted selectively by the ray or beam, and onto, from, or over which the ray or beam may be deflected or de-focused with more than two output electrodes, e.g. for multiple switching or counting for electrography or electrophotography, for transferring a charge pattern through the faceplate
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • G03G5/0202—Dielectric layers for electrography
    • G03G5/0205—Macromolecular components
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • G03G5/0202—Dielectric layers for electrography
    • G03G5/0217—Inorganic components
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/10—Bases for charge-receiving or other layers
    • G03G5/101—Paper bases
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/10—Bases for charge-receiving or other layers
    • G03G5/104—Bases for charge-receiving or other layers comprising inorganic material other than metals, e.g. salts, oxides, carbon
    • 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
    • Y10S101/00—Printing
    • Y10S101/37—Printing employing electrostatic force
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood

Definitions

  • This invention relates to a copy process and to elements for use in the practice of same. It relates more particularly to a dry copy process wherein electronic principles are employed in obtaining a reproduction of configurations appearing on an original, and it functions without limitation as to the color or light absorption characteristics of the original.
  • FIGURE 1 is a cross-sectional view of an electrostatic writing "tube in association with copy sheets embodying the features of this invention
  • FIGURE 2 is a perspective view'in' section of one form of copy sheet embodying the features of this invention.
  • FIGURE 3 is a perspective view similar to that of FIG- URE 2 showing another form of copy sheet embodying the features of this invention.
  • the electrostatic writing tube corresponds to a conventional cathode-ray tube, except for its target. It includes an evacuated envelope having located therein a cathode 12, a control electrode 14, an anode or accelerating electrode 16', a focus coil 18, and a deflection coil 20.
  • the cathode 12 is connected to a negative potential in the operating potential supply 22.
  • the signals are applied to the intensity control grid from a signal source 24.
  • the deflection signals are applied to the deflection coil from a deflection signal source 26.
  • a voltage-dropping resistor 28 the required amount of positive operating potential is applied to the anode 16 and the focus coil 18.
  • the target member includes a face plate 30 which is at anode potential. Supported within a slot in the face plate are a plurality of insulated wires 32. Each of these wires is separated one from the other by an insulating material, such as glass. The wires are mounted so that one end extends through to the outside face of the tube which is preferably finished to be substantially flat so that the copy sheet 34, coated with a dielectric writing medium, may be passed extremely close to the ends of the wires which are arrayed in a column to receive electrostatic charges.
  • An external plane or conductor 36 is connected to the anodes and extends in parallel spaced relation to the column of wire points as a ground plane. Portions of the wires at the opposite ends extend into the envelope and in the path of the signals directed thereto from the cathode-ray beam.
  • the cathode-ray beam which emanates from the cathode is deflected by the deflection signal source to sweep across the portions of the Wires which extend inside of the tube. Whether or not a wire is energized is determined by the intensity of the control signals received from the signal source 24 at the time that the cathode-ray beam is directed upon the wire.
  • a suitable scanning mechanism such as a facsimile scanner or a television camera
  • the copy sheets 34 with a surface 54 in the form of a continuous layer, film or coating of an insulating, dielectric material of low electrical conductivity, and a base 52 characterized by good electrical conducting properties, but with a seal between the dielectric, insulating layer and the conductive base to block passage of any charges from the surface of the copy sheet through the base.
  • While the desired electrical conductive properties may be provided by the use of a base sheet formed of a metal, it is more desirable from the standpoint of cost and flexibility to make use of a base sheet formed of cellulosic or cellulose derivative materials, as represented by a sheet of paper.
  • the diificulty arising from the use of a paper base sheet stems from the variation in the electrical conductive properties of the paper, depending upon the amount of moisture present in the atmosphere. It has been found that the quality of the image developed on the surfaces of the copy sheets depends greatly upon the electrical conductive properties of the copy sheets. Thus, it is desirable to make use of base sheets formed of paper but which are independent of the relative humidity for the production of copy.
  • an important concept of this invention resides in a means whereby copy of good quality can be secured independently of the environmental conditions existing, even when use is made of copy sheets formed of a paper base or other fibrous or cellulosic material, and it is an object of this invention to produce and to provide a method for producing copy sheetsin which use is made of paper base sheets and which are relatively insensitive to the amount of moisture existing in the atmosphere, and which are capable of use independently of the relative humidity consistently to produce copy of good quality by the described electrostatic duplicating system,
  • Example 1 by weight potassium chloride 88% by weight water 2% by weight butanol
  • Example 2 by weight potassium chloride 78% by weight water 2% by Weight butanol
  • the amount of potassium chloride or other water-soluble, ionizable salt may be varied to be present in an amount as little as 3% by weightand up to as much as or by weight for introducing the desired amount of salt into the paper base sheet.
  • Butanol is not essential to the treating composition, but it contributes materially to the penetration of the treating composition into the paper base sheet and the uniform distribution of the salts throughout the base sheet.
  • use can be made of other alcohols such as propanol, isopropyl alcohol, ethanol or other polyhydric alcohols, such as glycol, ethylene glycol, glycerine and the like.
  • potassium chloride instead of potassium chloride, use may be made of any of the following water-soluble, water-stable, ionizable metal salts in an amount ranging from 125% by weight of the treating composition:
  • Copy sheets 34 formed of a surface coating 54 of a good dielectric, insulating material on a paper base sheet 52 containing the water-soluble, water-stable, ionizable salt 50 are capable of use to provide copy of good quality independently of humidity conditions existing and with little, if any, variation in copy quality or color intensity from high humidity to exceptionally low relative humidity during the copy processing.
  • the high conductivity permanently built into the paper base sheet by the combination to include the water-soluble and ionizable salt nullifies the influence of humidity to the extent that uniform and good performance characteristics will be experienced throughout the described electrostatic duplicating process.
  • dielectric, insulating surface 54 use can be made of continuous coatings or laminates formed of polyethylene, Wax, unmodified or oil-modified alkyd-type resins, nitrocellulose, ethylcellulose, cellulose acetate, shellac, petroleum resins or other natural resins, polyesters, epoxide resins, organo-silicon polymers, polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, butadiene-styrene copolymer, chlorinated rubber, polyvinyl butyral, styrene-ethylene copolymer, or acrylic acid ester polymers such as polymethyl methacrylate.
  • ком ⁇ онент can be applied from solvent solution, water solution or aqueous dispersion onto the prepared paper base sheet 52.
  • Application can be made by conventioai coating means, such as spray coating, roller coating, dip coating, air doctoring or the like, in coating Weights of from 2-10- pounds per 3,000 square feet of surface area to provide a continuous layer 54 which effectively seals the pores at the surface of the paper base sheet to block the passage of charges from the dielectric surface through the conductive base sheet.
  • the described dielectric, insulating cooating may be provided in the form of a film of resinous material laminated onto the surfaceof the paper base sheet, as repersented by the lamination of a film of polyethylene onto the prepared base sheet.
  • humectant is intended to include such material as the polyhydric alcohols which are not readily evaporated upon exposure to atmospheric conditions. This includes glycerine, sorbitol, and the polyhydric alcohols such as ethylene glycol, polyethylene glycols, triethylene glycol and the polymers of triethylene glycols and mixtures thereof.
  • Treatment of the paper base sheet to incorporate the humectant is preferably achieved subsequent to the fabrication of the base sheet as by conventional coating or impregnating means.
  • Such means include a dip squeeze process, a roller coating process, spray coating process, or brush coating and the like. The following will represent the formulation of suitable treating compositions which may be used in the practice of this invention.
  • Example 3 25% by weight glycerine 73% by weight Water 2% by weight butanol
  • Example 4 25% by weight ethylene glycol 73% by weight water 2% by weight butanol
  • Example 5 50% by weight sorbitol 48% by weight water 2% by weight butanol
  • Example 6 10% by weight ethylene glycol 25% by weight sodium formate 65% by weight water
  • Example 7 24% by weight glycerine 1.7% by weight dibasic sodium phosphate 69% by weight water 4.3% by weight N-propanol
  • Example 8 25% by weight glycerine 63 by weight water 10% by weight potassium chloride 2% by weight butanol In the treatment of the a humectant, it is found humectant retained within impregnation subsequent to the application of the dielectric, insulating coating.
  • compositions which may be employed to fabricate the dielectric coating 54 onto the paper base sheet.
  • Example 9 Percent Oil-modified alkyd resin (50% solids in xylene- Aroplaz 7424 of Archer-Daniels-Midland) 36.5 Resin (Piccopale 100-Pennsylvania Industrial Chemical Company) 12 Xylene 21 Barium sulphate 30.5
  • compositions can be made by a conventional coating procedure to provide a uniform layer across the base sheet in coat ing weights of between 2 l0 pounds per 3,000 square feet of surface area, followed by an air dry or, preferably, a dry at elevated temperature of from 125250 F. to accelerate the removal of diluents.
  • the copy sheets prepared in accordance with the teachings of this invention are advanced between the wire array 32 and the ground 36. Advancement is made in synchronized relation with the scanning of the original to transmit a charge from the wire array in the target to the surface of the dielectric, insulating coating on the adjacent copy sheets.
  • the charge pattern 56 deposited to form a latent image on the surface of the copy sheets is retained on the surface until the image is developed during passage through a developing section 58 wherein the surface is dusted with a powder, toner, or colored resinous substance in particulate form having an opposite electrostatic charge.
  • the applied image is then capable of being permanently set onto the surface of the copy sheet during passage through a fixing section 60 wherein the image is exposed to heat and/or pressure, or vapor, or by combinations thereof, to provide the visible image 62 on the copy.
  • a copy sheet for use in receiving an electrostatic latent image comprising the combination of a paper base sheet, a continuous dielectric, insulating coating on the paper base sheet, a humectant uniformly distributed throughout the paper base sheet present in an amount within the range of 0.10% to 10.0% by weight of the paper base sheet, and a water-soluble, water-stable, ionizable metal salt uniformily distributed throughout in an amount within the range of 0.05% to 10.0% by weight of the paper base sheet, said percentages being based upon the weight of the paper base sheet.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Paper (AREA)
US79449159 1959-02-20 1959-02-20 Copy sheet for electrostatic printing Expired - Lifetime US3075859A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE587766D BE587766A (en, 2012) 1959-02-20
NL248586D NL248586A (en, 2012) 1959-02-20
US79449159 US3075859A (en) 1959-02-20 1959-02-20 Copy sheet for electrostatic printing
GB472060A GB949605A (en) 1959-02-20 1960-02-10 Improvements in or relating to electrostatic copy sheets
FR818587A FR1248378A (fr) 1959-02-20 1960-02-16 Procédé de reproduction, et éléments pour la mise en pratique de celui-ci
DE19601423733 DE1423733A1 (de) 1959-02-20 1960-02-19 Elektrostatische Kopierunterlage

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US79449059A 1959-02-20 1959-02-20
US79448959A 1959-02-20 1959-02-20
US79449159 US3075859A (en) 1959-02-20 1959-02-20 Copy sheet for electrostatic printing

Publications (1)

Publication Number Publication Date
US3075859A true US3075859A (en) 1963-01-29

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ID=27419910

Family Applications (1)

Application Number Title Priority Date Filing Date
US79449159 Expired - Lifetime US3075859A (en) 1959-02-20 1959-02-20 Copy sheet for electrostatic printing

Country Status (6)

Country Link
US (1) US3075859A (en, 2012)
BE (1) BE587766A (en, 2012)
DE (1) DE1423733A1 (en, 2012)
FR (1) FR1248378A (en, 2012)
GB (1) GB949605A (en, 2012)
NL (1) NL248586A (en, 2012)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212931A (en) * 1961-05-31 1965-10-19 Nippon Telegraph & Telephone Electrostatographic recording medium and a method of making the same
US3264137A (en) * 1962-05-04 1966-08-02 Scott Paper Co Electrostatic conductive paper and process of manufacture thereof
US3280036A (en) * 1959-07-31 1966-10-18 Burroughs Corp Electrostatic printing ink and process for preparing same
US3298831A (en) * 1963-07-02 1967-01-17 Cons Papers Inc Paper laminates for electrostatic printing support members
US3348970A (en) * 1962-01-16 1967-10-24 Scott Paper Co Electrostatic conductive paper
US3385730A (en) * 1964-04-01 1968-05-28 Dick Co Ab Writing medium for electrostatic printing
US3447948A (en) * 1965-09-02 1969-06-03 Fmc Corp Resin coated cellulosic sheet having reduced tendency to accumulate an electrostatic charge
US3459593A (en) * 1966-05-25 1969-08-05 Firestone Tire & Rubber Co Nonblocking electrostatic sheets
US3520771A (en) * 1964-10-02 1970-07-14 Paper Mfg Co Electrostatic printing tape
DE2132017A1 (de) * 1970-06-29 1972-02-10 Xerox Corp Elektrofotografisches Kopierpapier
US3873354A (en) * 1972-03-24 1975-03-25 Preco Corp Electrostatic printing
US3884687A (en) * 1966-02-14 1975-05-20 Union Carbide Corp Electrostatic printing process
US3891787A (en) * 1971-11-11 1975-06-24 Gen Co Ltd Electrostatic recording member
US3933489A (en) * 1972-03-24 1976-01-20 Preco Corporation Electrostatic reproduction process employing novel transfer paper
DE2515823A1 (de) * 1975-04-11 1976-10-21 Schoeller Felix Jun Fa Kunstharzbeschichtetes, aus papier bestehendes traegermaterial fuer fotografische schichten
US4110155A (en) * 1971-07-17 1978-08-29 Fuji Photo Film Co., Ltd. Method of manufacturing synthetic resin coated papers
US4208467A (en) * 1977-11-10 1980-06-17 Eastman Kodak Company Dielectric coating compositions and recording sheets made therefrom
US5114520A (en) * 1991-09-27 1992-05-19 Minnesota Mining And Manufacturing Company Image transfer apparatus and method
US5262259A (en) * 1990-01-03 1993-11-16 Minnesota Mining And Manufacturing Company Toner developed electrostatic imaging process for outdoor signs

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3273476A (en) * 1964-05-04 1966-09-20 Rca Corp Photocomposing system
US3496063A (en) * 1966-02-15 1970-02-17 Grace W R & Co Electrographic reproduction article and method
WO1980000014A1 (en) * 1978-06-06 1980-01-10 Ludlow Corp An improved dielectric product and process for the preparation thereof

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2040142A (en) * 1932-05-07 1936-05-12 Koreska Wilhelm Recording support
US2251742A (en) * 1935-08-31 1941-08-05 Western Union Telegraph Co Means for recording signals electrically
US2346670A (en) * 1940-01-19 1944-04-18 Western Union Telegraph Co Method of and means for recording signals electrically
US2716048A (en) * 1952-08-14 1955-08-23 Charles J Young Electrostatic facsimile receiver
US2777745A (en) * 1952-10-04 1957-01-15 Gen Dynamics Corp Electrostatic recording apparatus
US2833930A (en) * 1953-07-16 1958-05-06 Haloid Co Electrostatic charging method and apparatus
US2862815A (en) * 1953-10-01 1958-12-02 Rca Corp Electrophotographic member
US2879422A (en) * 1958-02-07 1959-03-24 Dick Co Ab Electrostatic writing tube
US2914403A (en) * 1955-05-17 1959-11-24 Rca Corp Electrostatic printing

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2040142A (en) * 1932-05-07 1936-05-12 Koreska Wilhelm Recording support
US2251742A (en) * 1935-08-31 1941-08-05 Western Union Telegraph Co Means for recording signals electrically
US2346670A (en) * 1940-01-19 1944-04-18 Western Union Telegraph Co Method of and means for recording signals electrically
US2716048A (en) * 1952-08-14 1955-08-23 Charles J Young Electrostatic facsimile receiver
US2777745A (en) * 1952-10-04 1957-01-15 Gen Dynamics Corp Electrostatic recording apparatus
US2833930A (en) * 1953-07-16 1958-05-06 Haloid Co Electrostatic charging method and apparatus
US2862815A (en) * 1953-10-01 1958-12-02 Rca Corp Electrophotographic member
US2914403A (en) * 1955-05-17 1959-11-24 Rca Corp Electrostatic printing
US2879422A (en) * 1958-02-07 1959-03-24 Dick Co Ab Electrostatic writing tube

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3280036A (en) * 1959-07-31 1966-10-18 Burroughs Corp Electrostatic printing ink and process for preparing same
US3212931A (en) * 1961-05-31 1965-10-19 Nippon Telegraph & Telephone Electrostatographic recording medium and a method of making the same
US3348970A (en) * 1962-01-16 1967-10-24 Scott Paper Co Electrostatic conductive paper
US3264137A (en) * 1962-05-04 1966-08-02 Scott Paper Co Electrostatic conductive paper and process of manufacture thereof
US3298831A (en) * 1963-07-02 1967-01-17 Cons Papers Inc Paper laminates for electrostatic printing support members
US3385730A (en) * 1964-04-01 1968-05-28 Dick Co Ab Writing medium for electrostatic printing
US3520771A (en) * 1964-10-02 1970-07-14 Paper Mfg Co Electrostatic printing tape
US3447948A (en) * 1965-09-02 1969-06-03 Fmc Corp Resin coated cellulosic sheet having reduced tendency to accumulate an electrostatic charge
US3884687A (en) * 1966-02-14 1975-05-20 Union Carbide Corp Electrostatic printing process
US3459593A (en) * 1966-05-25 1969-08-05 Firestone Tire & Rubber Co Nonblocking electrostatic sheets
DE2132017A1 (de) * 1970-06-29 1972-02-10 Xerox Corp Elektrofotografisches Kopierpapier
US4110155A (en) * 1971-07-17 1978-08-29 Fuji Photo Film Co., Ltd. Method of manufacturing synthetic resin coated papers
US3891787A (en) * 1971-11-11 1975-06-24 Gen Co Ltd Electrostatic recording member
US3873354A (en) * 1972-03-24 1975-03-25 Preco Corp Electrostatic printing
US3933489A (en) * 1972-03-24 1976-01-20 Preco Corporation Electrostatic reproduction process employing novel transfer paper
DE2515823A1 (de) * 1975-04-11 1976-10-21 Schoeller Felix Jun Fa Kunstharzbeschichtetes, aus papier bestehendes traegermaterial fuer fotografische schichten
US4208467A (en) * 1977-11-10 1980-06-17 Eastman Kodak Company Dielectric coating compositions and recording sheets made therefrom
US5262259A (en) * 1990-01-03 1993-11-16 Minnesota Mining And Manufacturing Company Toner developed electrostatic imaging process for outdoor signs
US5114520A (en) * 1991-09-27 1992-05-19 Minnesota Mining And Manufacturing Company Image transfer apparatus and method

Also Published As

Publication number Publication date
FR1248378A (fr) 1960-12-09
NL248586A (en, 2012) 1900-01-01
DE1423733A1 (de) 1968-10-24
BE587766A (en, 2012) 1900-01-01
GB949605A (en) 1964-02-12

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