US3598581A - Manifold imaging method - Google Patents

Manifold imaging method Download PDF

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US3598581A
US3598581A US628028A US3598581DA US3598581A US 3598581 A US3598581 A US 3598581A US 628028 A US628028 A US 628028A US 3598581D A US3598581D A US 3598581DA US 3598581 A US3598581 A US 3598581A
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layer
acid
phthalocyanine
imaging
image
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Gedeminas J Reinis
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Xerox Corp
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Xerox Corp
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G17/00—Electrographic processes using patterns other than charge patterns, e.g. an electric conductivity pattern; Processes involving a migration, e.g. photoelectrophoresis, photoelectrosolography; Processes involving a selective transfer, e.g. electrophoto-adhesive processes; Apparatus essentially involving a single such process
    • G03G17/10—Electrographic processes using patterns other than charge patterns, e.g. an electric conductivity pattern; Processes involving a migration, e.g. photoelectrophoresis, photoelectrosolography; Processes involving a selective transfer, e.g. electrophoto-adhesive processes; Apparatus essentially involving a single such process using migration imaging, e.g. photoelectrosolography
    • 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
    • G03G13/14—Transferring a pattern to a second base
    • 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
    • G03G13/14—Transferring a pattern to a second base
    • G03G13/16—Transferring a pattern to a second base of a toner pattern, e.g. a powder pattern
    • 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
    • G03G13/22—Processes involving a combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G13/24—Processes involving a combination of more than one step according to groups G03G13/02 - G03G13/20 whereby at least two steps are performed simultaneously
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G17/00—Electrographic processes using patterns other than charge patterns, e.g. an electric conductivity pattern; Processes involving a migration, e.g. photoelectrophoresis, photoelectrosolography; Processes involving a selective transfer, e.g. electrophoto-adhesive processes; Apparatus essentially involving a single such process
    • G03G17/08—Electrographic processes using patterns other than charge patterns, e.g. an electric conductivity pattern; Processes involving a migration, e.g. photoelectrophoresis, photoelectrosolography; Processes involving a selective transfer, e.g. electrophoto-adhesive processes; Apparatus essentially involving a single such process using an electrophoto-adhesive process, e.g. manifold imaging

Definitions

  • the imaging layer is activated, a receiver sheet is laid down over its surface. A potential is then applied across the manifold set while it is exposed to a pattern of lightand-shadow representative of the image to be reproduced. Upon separation of the donor substrate from the receiver sheet, the imaging layer fractures along the lines defined by the boundaries of the pattern of light-andshadow to which it has been exposed with part of this layer being transferred to the receiver sheet while the rernainder is retained on the donor substrate resulting in a positive image on one while a negative image is produced on the other.
  • This imaging system is capable of producing images of high contrast and of good quality.
  • the step of activating the donor layer with a swelling agent or solvent makes the process undesirably complex.
  • a further object of this invention to provide an imaging process of the lowest possible order of complexity.
  • a manifold set comprising a substrate, coated thereover an imaging layer comprising a layer of a cohesively weak photoresponsive imaging material overcoated with an activating layer and in place thereover, a receiving sheet.
  • the activating layer may be precoated directly on the receiving sheet.
  • the photoresponsive layer and activating layer combination has a greater initial adhesion to the substrate than to the receiving sheet.
  • the substrate and/or the receiving sheet is at least partially transparent.
  • a potential is applied across the imaging layer while an image is projecte d onto the layer. Either just before or during the imaging operation, the activating layer is heated to render the imaging layer cohesively weak.
  • the activating layer comprises a material which melts at a lower temperature than the photoresponsive layer upon heating and at least partially dissolves the body of the imaging layer, thus rendering it weak structurally so that it can be fractured more easily along a sharp line which defines the image to be reproduced and makes the top surface of the imaging layer slightly tacky.
  • the body of the imaging layer may be at ambient temperatures structurally strong thus capable of withstanding shipping and storage. Only when activated by the application of heat does the layer become structurally cohesively weak and capable of fracturing to form an image.
  • the manifold set may include separate electrodes on opposite sides of the donor substrate and receiver sheet for the application of the field or the electrodes may be directly on the back surface of these members and integral therewith.
  • one or both of the substrate and receiver sheet may be made of a conductive material.
  • the set may also be precharged with roller electrodes after fusion but before light exposure.
  • the photoresponsive layer serves the dual function of imparting light sensitivity to the system while at the same time acting as a colorant for the final image produced, although other colorants such as dyes and pigments may be added to so as to intensify or modify the color of the final images produced when image color is important.
  • the photoresponsive layer may be homogeneous or heterogeneous; that is may include one material dispersed throughout a second material.
  • the photoresponsive layer, the activating layer or either electrode may have spectral or electrical sensitizers added thereto as desired.
  • FIG. 1 is a side sectional view of a first embodiment of a photosensitive imaging member for use in the imaging process of the invention
  • FIG. 2 shows a schematic representation of the exnosure of the imaging member to an image to be produced
  • FIG. 3 schematically shows the step of developing the image formed by separating the donor and the receiver sheets.
  • FIG. 1 of the drawings there is seen a supporting donor substrate layer 11 and an imaging layer generally designated 10.
  • Imaging layer 10 is made up of photoresponsive layer 12 coated on donor substrate 11 and activating layer 14 coated on a photoresponsive layer 12.
  • This combination of donor substrate layer 11, imaging layer 12 and receiving sheet 13 is referred to as a manifold set.
  • Layer 12 is coated on substrate 11 so that it adheres thereto.
  • Receiving sheet 13 is in contact with imaging activating layer 14 but does not adhere strongly thereto.
  • imaging layer 10 is sufliciently cohesively strong as to permit reasonable handling, shipping and storage. However, layer 10 is capable of being rendered cohesively weak upon heating.
  • FIG. 1 In the particular illustrative examples shown in FIG.
  • photoresponsive layer 12 consists of photoconductive pigment particles dispersed in a binder. This two-phase system has been found to constitute a preferred form for photoresponsive layer 12 in that it gives images of good resolution and is highly photosensitive. However, homogeneous layers made up, for example, of a single component or a solid solution of two or more components may be employed where these materials exhibit the desired photoresponse and have the desired physical properties. Since photoresponsive layer 12 serves as a photoresponsive element of the system as well as the colorant in the final image produced, the components of this layer are in most cases preferably selected so as to have a high level of photosensitivity while, at the same time, being intensely colored so that a high contrast image can be formed by the process of the invention.
  • the binder itself can be dyed or pigmented with additional colorant in either the single phase or two phase system, intense coloration of the photosensitive material itself, while being preferred, is not essential. Accordingly, the photosenstive material may be of any color, even transparent.
  • Any suitable photosensitive material may be employed in the imaging system of this invention with the selection depending largely upon the photosensitivity required, the spectral sensitivity desired, the degree of contrast desired in the final image, the color of the final image preferred, whether a heterogeneous or a homogeneous system is desired and similar considerations.
  • Typical photosensitive materials include substituted and unsubstituted phthalocyanine; quinacridones; zinc oxide; mercuric sulfide; Algol Yellow (OJ. No. 67,300); cadium sulfide; cadmium selenide; Indofast brilliant scarlet (Cl. No.
  • organic photoconductors including those complexed with small amounts, up to about 5%, of suitable Lewis acids) such as:
  • Lewis acid electron acceptor
  • Typical Lewis acids are 2,4,7-trinitro-9'-fluorenone; 2,4, 5,7-tetranitro-9-fluorenone; picric acid; 1,3,5-trinitrobenzene chloranil; benzoquinone; 2,5-dichlorobenzoqui none; 2-6-dichl0robenzoquinone; chloranil; naphthoquinone-( 1,4); 2,3-di-chloronaphthoquinone-(1,4); anthraquinone; Z-methyl-anthraquinone; 1,4-dimethyl-anthraquinone; l-chloroanthraquinone; anthraquinone 2 carboxylic acid; 1,S-dichloroanthraquinone, 1-chloro
  • photoconductors may be formed by complexing one or more suitable Lewis acids with aromatic polymers which are ordinarily not thought of as photoconductors.
  • aromatic polymers include the following illustrative materials; polyamides; polyimldes, polycarbonates, epoxy resins, phenoxy resins, aromatic silicone resins, polyphenylene oxide, polysulfones, melamine resins, phenolic resins, and mixtures and copolymers thereof where applicable.
  • Phthalocyanines are preferred because of their h gh sensitivity and excellent color. Any suitable phthalocyanine may be used to prepare the photoconductive layer of the present invention.
  • the phthalocyanine used may be in any suitable crystal form. It may be substituted or unsubstituted both in the ring and straight chain portions. Reference is made to a book entitled Phthalocyanine Compounds by F. H. Moser and A. L. Thomas, published by the Reinhold Publishing Company, 1963 edition for a detailed description of phthalocyanines and their synthesis. Any suitable phthalocyanine may be used in the present invention.
  • Phthalocyanines encompassed within this invention may be described as compositions having four isoindole groups linked by four nitrogen at o r n s in such a manner so as to form a conjugated chain, said compositions having the general formula (C H N ).,R, wherein R is selected from the group consisting of hydro- 6 gen, deuterium, lithium, sodium, potassium, copper, silver, beryllium, magnesium, calcium, zinc, cadmium barium, mercury, aluminum, gallium, indium, lanthanum, neodymium, samarium, europium, gadolinium, dypsprosium, holmium, erbium, thulium, ytterbium, lutecium, titanium, tin, hafnium, lead, silicon, gervanium, thorium, vanadium, antimony, chromium, molybdenum, uranium, manganese, iron, cobalt, nickel, r
  • Suitable phthalocyanines such as ring or aliphatically substituted metallic and/or nonmetallic phthalocyanines may also be used if suitable.
  • Typical phthalocyanines are: aluminum phthalocyanine, aluminum polychlorophthalocyanine, antimony phthalocyanine, barium phthalocyanine, beryllium phthalocyanine, cadmium hexadecachloro phthalocyanine, cadmium phthalocyanine, calcium phthalocyanine, cerium phthalocyanine, chromium phthalocyanine, cobalt phthalocyanine, cobalt chlorophthalocyanine, copper 4- aminophthalocyanine, copper bromochlorophthalocyanine, copper 4-chlorophthalocyanine, copper 4-nitrophthalocyanine, copper phthalocyanine, cooper phthalocyanine sulfonate, copper polychlorophthalocyanine, deuteriophthalocyanine, dysprosium phthalocyanine, erb
  • the photoconductive particles themselves may consist of any suitable one or more of the aforementioned photoconductors, either organic or inorganic, dispersed in, in solid solution in, or copolymerized with, any suitable insulating resin Whether or not the resin itself is photoconductive.
  • This particular type of particle may be particularly desirable to facilitate dispersion of the particle, to prevent undesirable reactions between the binder and the photoconductor or between the photoconductor and the activator and for similar purposes.
  • Typical resins include polyethylene, polypropylene, polybutylene, polyamides, polymethacrylates, polyacrylates, polyvinyl chlorides, polyvinyl acetates, polystyrene, polysiloxanes, chlorinated rubbers, polyacrylonitrile, epoxies, phenolics, hydrocarbon resins and other natural resins such as rosin derivatives as well as mixtures and copolymers thereof.
  • Polyethylene is preferred because of its low melting point and because it is readily available.
  • the binder material in the heterogeneous imaging layer may comprise any suitable cohesively weak insulating or photoconductive insulating materials.
  • Typical cohesively weak materials include the insulating resins listed above particularly the lower molecular weight polyethylenes, polybutylenes and polypropylenes; vinyl acetate-ethylene copolymer; styrene-vinyl toluene copolymers; microcrystalline wax; parafiin wax; other low molecular weight polymers and copolymers and mixtures thereof.
  • a mixture of microcrystalline and paraflinic waxes is preferred because it is cohesively weak and a good insulator.
  • the ratio of photoconductor to binder in photoresponsive layer 12 may range from about 10:1 to about 1:10 (by volume), but is has generally been found that proportions in the range from about 1:2 to about 2:1 produce the best results and, accordingly, this constitutes a preferred range.
  • the electrodes may consist of any suitable conductive material.
  • Typical conductive electrode materials include aluminum, brass, stainless steel, copper, nickel, zinc and mixtures thereof.
  • Aluminum is preferred because it is readily available and because it is a good conductor.
  • the donor substrate and the receiving sheet may consist of any suitable insulating material.
  • Typical insulating materials include polyethylene, polyethylene terephthalate, cellulose acetate, paper, plastic coated paper, such as polyethylene coated paper, and mixtures thereof.
  • Mylar a polyester formed by the condensation reaction between ethylene glycol and terephthalic acid available from the E. I. du Pont de Nemours & Company, Inc. is preferred because of its physical strength and because it has good insulation qualities.
  • the receiving sheet may be conductive, such as aluminum foil or an aluminum coated insulating film.
  • Activating layer 14 has a lower melting temperature than does photoresponsive layer 12.
  • Activating layer 14 may be homogeneous or heterogeneous; that is, may include an activating material dispersed in a binder. During assembly of the manifold set, activating layer 14 may beformed initially either on the surface of photoresponsive layer 12 or on the surface of receiving sheet 13.
  • Activating layer 14 may comprise a material such as a low melting wax which melts at a lower temperature than layer 12, rendering layer 12 cohesively weak and the layer 12-sheet 13 interface tacky.
  • activating layer 14 may comprise, alone or in a binder a thermosolvent.
  • a thermo-solvent is an ingredient which is solid at ordinary room temperatures but which melts slightly above room temperature.
  • thermo-solvents and low melting waxes include materials which are solid at room temperature but melt at temperatures below F. Especially good results have been obtained with long chain petroleum waxes with from about 18 to about 30 carbon atoms in the chain.
  • Typical low melting waxes include octadecane, nonadecane, eicosane, hene-icosane, docosane, tricosane, tetracosane, pentacosane, hexacosane, heptacosane, octacosane, nonacosane, triacontane, and mixtures thereof. If desired, these low melting waxes may be mixed with other materials, such as higher melting waxes.
  • thermo-solvents which may be dispersed in a binder or used alone where suitable include m-terphenyl, Aroclar 5442 (a chlorinated polyphenyl, melting point 46-52 C. from Monsanto Chemical Company), perchloro hydrocarbons, polybutylenes, biphenyl, and mix tures thereof.
  • Typical binder materials suitable for. use with some thermo-solvents include the low melting Waxes described above and the donor-layer binders listed above.
  • thermo-solvent After imaging, separation of receiving sheet 13 from donor substrate 11 and cooling of the material to room temperature, the thermo-solvent will resolidify. This will tend to fix images produced since the resin is now in a tougher, more abrasion resistant form. The images formed will be more easily handled and more resistant to abrasive damage than would be the case where imaging layer 10 was cohesively weak at room temperatures.
  • FIG. 2 shows a typical embodiment of a means for exposing the manifold set to a light-and-shadow image.
  • the exposure means here consist of a lamp 15, a transparency 16 and a lens 17.
  • a potential is applied across imaging layer 12.
  • donor substrate layer 11 is transparent and conductive, e.g., tin oxide coated glass.
  • Receiving sheet 13 is also conductive so that the potential is applied by a means of power supply 18 connected to the donor substrate and receiving sheet through resistor 19.
  • Preferred field strengths are in the range of about 1000 to 2000 volts per mil across the manifold set. Thus, the applied voltage will ordinarily be in the range of 4000 to 10,000 volts.
  • a fairly large resistor is preferably inserted in series with the power supply to limit the flow of current and the rate of charging of the capacitor which the manifold set forms.
  • a fairly large resistor on the order of from about at least 5000 to 20,000 mg./ ohms satisfactorily performs this function.
  • the manifold set is heated by means of heated platen 20 to such a temperature that the layer 12 will be cohesively weak when receiving sheet 13 is stripped from the manifold set. Where a thermo-solvent is used, this temperature will be slightly above the melting point of the thermo-solvent.
  • the manifold set may be heated just before imaging so long as the imaging layer 10 remains in a cohesively weak state during imaging or until receiving sheet 13 is stripped from the manifold set to develop the image. Also, the heating could take place after exposure to the image and either before or during separation of the receiving sheet 13 from the manifold set.
  • FIG. 3 shows schematically the development of the visible image. While the potential is maintained across the manifold set, and while imaging layer 10 remains c0- hesively weak, receiving sheet 13 is stripped from the manifold set. Generally, a positive image is formed on the donor substrate and a negative image on the receiving sheet. Thus, portions of layer 12 which were light struck transfer to receiving sheet 13 while non-light struck portions remain on donor sheet 11. During this development operation, the imaging layer 10 remains in its heated, cohesively weak state. After separation, the imaged sheet 11 and 13 are cooled to room temperature. The portion of imaging layer 12 on each sheet thus returns to its cooled, structurally sturdy, state. Where desired, the images may be further fixed by any suitable method, such as overcoating with a resin or laminating a transparent sheet thereover.
  • This paste is then coated onto a 2 mil Mylar (polyethylene terephthalate, available from E. I. du Pont de Nemours & Company) donor sheet with a No. 36 wire-wound rod which produces a coating thickness of about 7 /2 microns after drying.
  • Mylar polyethylene terephthalate, available from E. I. du Pont de Nemours & Company
  • a mixture of about 2.5 parts eicosane (technical grade, a mixture of predominately straight chain hydrocarbons averaging 20 carbon atoms to the molecule) and about 7.5 parts Sunoco 5825, a petroleum wax available from the Sun Oil Company are suspended in about 100 parts Sohio Odorless Solvent 3440 and applied to a 2 mil Mylar receiving sheet.
  • eicosane technical grade, a mixture of predominately straight chain hydrocarbons averaging 20 carbon atoms to the molecule
  • Sunoco 5825 a petroleum wax available from the Sun Oil Company
  • a 15 volt AC. power supply connected to the NESA coating is activated, heating the set to about 150 F. by resistance in the NESA coating. At this temperature, the thin layer of eicosane in Sunoco 5828 melts.
  • the receiver sheet is peeled from the set with the potential source still connected. The set is allowed to cool after exposure so that after separation of the sheets a pair of excellent quality images with a duplicate of the original on the donor sheet and a reversal of the original on the receiver sheet are produced.
  • Example II The procedure of Example I is repeated for each of these examples except that in place of the 5 parts phthalocyanine, the following photosensitive materials are used: for Example II, about 6 parts Algol Yellow GC, C.I. No. 67300, 1,2,5,6-di (C,C'-diphenyl)-thiazole-anthraquinone, available from General Dye Stuffs; for Example III, about 6 parts Watchung Red B, C.I. No. 15865, 1-(4'-methyl- 5'-chloroazobenzene-2-suflonic acid)-2-hydroxy-3-naphthoic acid, available from E. I. duPont de Nemours & thoic acid, available from E.
  • Example I and V are cyan in color
  • Examples 11 and IV produce yellow images
  • Example III a magenta image.
  • Example VI The procedure of Example I is followed in each of these examples except that the following matereials are substituted for the Sunoco 1290 used in Example I: for Example VI, Sunoco 985, a microcrystalline wax having an ASTM-Dl27 melting temperature of 193 F. is used; for Example VII Sunoco 5512, a paraffin wax having a melting temperature of 153 F. (ASTM-D-87) is used; and for Example VIII Epolene C-12, a low molecular weight polyethylene having an approximate molecular Weight of 3,700, a ring and ball softening temperature of 92 C., an acid number of 0.05 and a density at 25 C. of 0.893 (available from the Eastman Chemical Products Company) is used. Each of these binders produces good images conforming to the original. Some background, observable as a blue haze, is observable in Example VII, apparently due to the relatively low melting temperature of the Sunoco 5512.
  • Example IX-XII The procedure of Example I is followed, except that in these examples the eicosane-Sunoco 5825 heat activatable layer is replaced by other materials.
  • Example IX this layer consists of about 5 parts docosane mixed with about 5 parts Sunoco 5825. This layer is coated directly over the phthalocyanine-Sunoco 1290 layer and a NESA glass plate is placed over the thus formed layer. The resulting manifold set is then imaged as in Example I, producing a good image conforming to the original.
  • Example X technical grade heptacosane is coated from a solution in ethanol onto the receiving sheet surface to a dry thickness of about 2 microns.
  • the resulting manifold set is heated to about F. during imaging. An excellent image results.
  • Example XI a mixture of about 4 parts Aroclor 5442 and about 6 parts Sunoco 5512 is coated onto the receiving sheet surface as in Example I.
  • the manifold set is heated to about F. during imaging. A good image corresponding to the original results.
  • Example I The procedure of Example I is followed, except that the following layer is used in place of the phthalocyanine- Sunoco 1290 layer.
  • This layer is prepared as follows: about 8 parts 2,5- bis(p-aminophenyl)-l,3,4-oxadiazole and about 11 parts Lucite 2008, a low molecular Weight polymethylmethacrylate (from E. I. du Pont de Nemours & Company) are dissolved in about 70 parts methyl ethyl ketone. To this solution is added about 0.25 parts Rhodamine B [9-(O-carboxyphenyl)-6-(diethylamino) 3 xanthene- 3-xylene]-diethyl-chloride available from E. I. du Pont de Nemours & Company. This solution is then coated onto a 2 mil Mylar sheet and partially dried.
  • Example I Before the coating is fully dried, it is dipped into a methanol bath which dilutes the solution, causing the solids to precipitate out in a weak, semi-particulate form in which individual particles are bonded at their interface much like a sintered layer.
  • the donor thus prepared is dried at about 50 C. and is used according to the procedure of Example I. An image of good quality, but of lower resolution than that in Example I results.
  • An imaging method which comprises the steps of:
  • a manifold set comprising an insulating donor substrate having coated thereon an imaging layer, comprising an electrically photosensitive material dispersed in an insulating binder, an activating layer comprising a thermo-solvent overlying said imaging layer, and a receiving sheet overlying said activating layer; said activating layer having a lower melting temperature than said imaging layer and is at least a partial solvent for said imaging layer when melted and at least one of said donor and receiver layers being at least partially transparent to light;
  • imaging layer comprises a particulate photoresponsive material dispersed in a binder selected from the group consisting of photoconductive insulating and electrically insulating materials and said activating layer comprises a low melting wax.
  • said activating layer 12 comprises a mixture of a binder selected from the group consisting of photoconductive insulating and electrically insulating materials and a thermo-solvent and said heating step is to a temperature above the melting temperature of said thermo-solvent.
  • An imaging member comprising:
  • a receiver layer overlying said activating layer; at least one of said donor and receiving layers being at least partially transparent to light to which said imaging layer is sensitive.
  • imaging member of claim 1 in which said imaging layer comprises a particulate photosensitive material dispersed in a binder selected from the group consisting of photoconductive insulating and electrically insulating materials.
  • thermo-solvent a binder selected from the group consisting of photoconductive insulating and electrically insulating materials, the melting temperature of said thermo-solvent being lower than the melting temperature of said imaging layer.

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3723112A (en) * 1967-10-17 1973-03-27 Xerox Corp Manifold imaging method wherein the activator carries a plastic coating material
US3819368A (en) * 1969-07-28 1974-06-25 Xerox Corp Manifold imaging member employing a fixative layer
US3850626A (en) * 1973-02-26 1974-11-26 Xerox Corp Imaging member and method
US3854976A (en) * 1970-09-25 1974-12-17 Ritzerfeld Gerhard Applicator and method for making a printing form
US3907558A (en) * 1973-12-28 1975-09-23 Xerox Corp Manifold imaging utilizing silica gel activating layer
US3912504A (en) * 1974-01-21 1975-10-14 Xerox Corp Manifold imaging with thermal activator contained in a silica gel layer
US3955975A (en) * 1974-03-28 1976-05-11 Xerox Corporation Manifold imaging member and process employing a metal soap
US3964904A (en) * 1974-08-22 1976-06-22 Xerox Corporation Manifold imaging member and process employing a dark charge injecting layer
US4012253A (en) * 1972-11-27 1977-03-15 Rca Corporation Holographic recording medium
US4032338A (en) * 1974-10-16 1977-06-28 Rca Corporation Holographic recording medium employing a photoconductive layer and a low molecular weight microcrystalline polymeric layer
US4108655A (en) * 1974-02-25 1978-08-22 Xerox Corporation Method of making a thermo active imaging member

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3723112A (en) * 1967-10-17 1973-03-27 Xerox Corp Manifold imaging method wherein the activator carries a plastic coating material
US3819368A (en) * 1969-07-28 1974-06-25 Xerox Corp Manifold imaging member employing a fixative layer
US3854976A (en) * 1970-09-25 1974-12-17 Ritzerfeld Gerhard Applicator and method for making a printing form
US4012253A (en) * 1972-11-27 1977-03-15 Rca Corporation Holographic recording medium
US3850626A (en) * 1973-02-26 1974-11-26 Xerox Corp Imaging member and method
US3907558A (en) * 1973-12-28 1975-09-23 Xerox Corp Manifold imaging utilizing silica gel activating layer
US3912504A (en) * 1974-01-21 1975-10-14 Xerox Corp Manifold imaging with thermal activator contained in a silica gel layer
US4108655A (en) * 1974-02-25 1978-08-22 Xerox Corporation Method of making a thermo active imaging member
US3955975A (en) * 1974-03-28 1976-05-11 Xerox Corporation Manifold imaging member and process employing a metal soap
US3964904A (en) * 1974-08-22 1976-06-22 Xerox Corporation Manifold imaging member and process employing a dark charge injecting layer
US4032338A (en) * 1974-10-16 1977-06-28 Rca Corporation Holographic recording medium employing a photoconductive layer and a low molecular weight microcrystalline polymeric layer

Also Published As

Publication number Publication date
DE1772114A1 (de) 1970-10-29
LU55806A1 (enrdf_load_html_response) 1968-11-27
ES352316A1 (es) 1969-12-16
CH474097A (de) 1969-06-15
NL6804706A (enrdf_load_html_response) 1968-10-04
SE340404B (enrdf_load_html_response) 1971-11-15
DE1772114C3 (de) 1974-03-07
FR1560020A (enrdf_load_html_response) 1969-03-14
NO128040B (enrdf_load_html_response) 1973-09-17
GB1200712A (en) 1970-07-29
NL149611B (nl) 1976-05-17
BE713100A (enrdf_load_html_response) 1968-10-02
DE1772114B2 (de) 1973-08-16
AR198157A1 (es) 1974-06-07

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