US3410712A - Pressure responsive transfer system and process of making - Google Patents

Pressure responsive transfer system and process of making Download PDF

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Publication number
US3410712A
US3410712A US49767065A US3410712A US 3410712 A US3410712 A US 3410712A US 49767065 A US49767065 A US 49767065A US 3410712 A US3410712 A US 3410712A
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Prior art keywords
polyethylene
weight
pigment particles
depressions
transfer
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English (en)
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Winzer Hermann
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Renker Belipa GmbH
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Renker Belipa GmbH
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Priority to US49767065 priority Critical patent/US3410712A/en
Priority to ES0332356A priority patent/ES332356A1/es
Priority to FR80251A priority patent/FR1496884A/fr
Priority to GB4684966A priority patent/GB1171926A/en
Priority to CH1513566A priority patent/CH466338A/fr
Priority to BE688459D priority patent/BE688459A/xx
Application granted granted Critical
Publication of US3410712A publication Critical patent/US3410712A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/10—Duplicating or marking methods; Sheet materials for use therein by using carbon paper or the like
    • 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
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/1241—Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612—Composite web or sheet
    • Y10T428/2462—Composite web or sheet with partial filling of valleys on outer surface
    • 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]
    • Y10T428/31971—Of carbohydrate
    • Y10T428/31993—Of paper

Definitions

  • This invention generally relates to writing and manifold material and is particularly directed to a pressure sensitive transfer or duplicating system which permits the transfer of writing, symbols, markings, and the like (hereinafter collectively being referred to as writing) without the use of ordinary carbon papers.
  • the invention is also concerned with a method of producing the novel transfer system.
  • Conventional carbon and other such transfer papers comprise a wax-containing color layer which is normally covered by a further wax coat.
  • These conventional carbon or transfer papers suffer from the serious disadvantage that they :are not sufiiciently clean on handling. Soiling of the hands and clothing of a user cannot usually be avoided even if extreme care is taken. Due to the wax components contained in the color and/ or coating layer of such conventional carbon papers, the copies produced moreover tend to smear and smudge, a disadvantage which becomes particularly pronounced upon frequent handling of the copies.
  • the inventive pressure-responsive transfer system comprises a carrier member such as, for example, a paper sheet.
  • a carrier member such as, for example, a paper sheet.
  • the vinyl polymers may contain plasticizers.
  • the color transfer from this color-enriched carrier is induced by a separate color transfer inducing layer which is arranged between the surface of the paper carrier which has the pigment-filled depression and a receiving sheet, to wit, a sheet which is arranged for receiving the writing.
  • This color transfer inducing layer exhibits sufficient adhesive characteristics both with respect to the color carrier and also in respect to the receiving sheet, so as to be capable to cause the transfer of pigment particles from the color carrier to the receiving sheet at those areas
  • the type of the pigment composition described in the following is chosen so that penetration of color to the opposite surface of the carrier does not take place after lodging the pigment particles on a carrier, to wit e.g. a paper sheet.
  • the pigment particles are retained within the depressions on one face of the carrier and do not break through to the opposite face thereof.
  • the inventive transfer sheets can be prepared so that one face of the sheets acts as a writing receiving surface while the opposite face is constructed as a transfer surface which transfers writing to a receiving surface of a sheet arranged in subjacent position.
  • the total thickness of sets of paper sheets can be significantly reduced, and all the sheets of such a set will produce clearly legible copies with sharp and smudge-free contours. While customary carbon papers have to be removed from the paper sets after the copies have been produced, the inventive transfer system may thus be arranged so that the transfer-producing layers form an integral part of the copies.
  • the inventive transfer system produces copies of superior legibility and sharpness and the copies are surprisingly smearand smudge-resistant. Moreover, a large number of copies can simultaneously be produced.
  • paper is the preferred carrier material, although sheets of any suitable organic or inorganic material could be used.
  • paper sheets of a thickness of 20 to p. are employed. That surface of the paper sheet from which the color transfer takes place is not plane but has a large number of depressions which are spaced from each other by distances of about 1 to 50;.
  • the outer boundaries of these depressions are formed by protuberances or ridges in the paper surface, for example, formed by paper fibers which extend inthe surface of the paper carrier with a width of preferably up to 50a.
  • the depressions have a depth of at least about 10 but not more than at the most about 60% of the thickness of the paper carrier.
  • the pigment particles are embedded or lodged within these depressions. These pigment particles thus form the color material for the transfer of the writing.
  • pigment particles are .used whose diameter is smaller than the depressions of the carrier.
  • the pigment is ground into a particle size sufficiently fine so as to be smaller than the depressions referred to.
  • the pigment particles are mixed with a binder in the form of elastic vinyl polymers and a liquid which acts as solvent for the polymers but which does not dissolve the pigment.
  • the pigment particles are uniformly distributed throughout this liquid phase.
  • the amount of elastic vinyl polymers in the mixture referred to is chosen so that it advantageously corresponds to 15 to 25% by weight, calculated on the weight of the pigment particles.
  • each pigment particle is coated with a thin elastic resin skin or coat. It is also within the scope of this invention to grind the pigment to the necessary fineness after it has been incorporated into the liquid which contains the binding agent. Particularly favorable results are obtained if the pigment is admixed with a small amount of silicic acid particularly in colloidal form.
  • the pigment composition thus prepared is applied to.
  • color lacquers to wit, organic dye stuffs deposited on inorganic pigments are preferred pigments for the purposes of this invention. This is so since such color lacquers are insoluble in solvents which customarily are used for dissolving vinyl polymers, such as methanol and water. Therefore, any danger of penetration of the color to the opposite face of the paper carrier is avoided even if very thin paper carriers are employed.
  • other color substances are also suitable such as, for example, phthalocyanine colors and inorganic pigments as, for ex ample, ultramarine or organic or inorganic black pigments.
  • vinyl polymers may be used for the inventive purposes. Particularly favorable results are obtained with vinyl acetate having an average molecular weight of about 20,000 to 50,000.
  • vinyl copolymers can be employed as, for example, vinyl chloride-vinyl acetate copolymers, wherein the ratio of vinyl chloride to vinyl acetate is between about 80-90:l020% with a K value of 40 to 65.
  • Polyvinyl alcohols with about 12% of acetyl groups are also suitable.
  • the ratio of binder, to wit, vinyl polymer, to pigment is not the usual one since customarily in color lacquers the binder moiety by far exceeds the color moiety. Rather in accordance with the invention only about 15 to 25% by weight of binder, calculated on the pigment moiety, are used. This ratio is characteristic for the color preparations to be used in accordance with this invention and it constitutes an important feature of the invention. This is so because an insuflicient amount of vinyl polymer would cause but an incomplete enveloping of the pigment particles which could result in peeling of the preparation.
  • the inventive procedure assures a bonding of the color particles to the carrier to such an extent that rubbing off, smearing, or other undesired or untimely removal of the pigment color from the carrier is effectively prevented, while on the other hand removal of the color particles by means of the adhesive transfer-inducing layer is readily accomplished upon application of writing pressure.
  • the transfer inducing layer is in the fomi of a gel, to wit, a two-phase system consisting of a network of solid particles in which liquid is held.
  • a gel in accordance with the invention use is made of one or several polyethylenes with an average molecular weight of about 1500 to 2000.
  • the polyethylenes are moreover defined by a melting point of about 80 to 110 C., a viscosity at 140 C. of about 100 to 250 cps, a specific weight of about 0.92 and a penetration hardness of about 0.2 to 4.0 as determined on 100 grams, for 5 secOnds at 77 F. in accordance with ASTMD l32l57 T.
  • the said gel is prepared by dissolving 2 to 7 parts by Weight of the previously defined polyethylene or a mix-- ture of such polyethylenes in 93 to 98 parts by weight of a suitable solvent.
  • Preferred solvents are liquid aliphatic hydrocarbons having 4 through 12 carbon atoms or liquid aliphatic chlorinated hydrocarbons with 1 to 6 carbon atoms.
  • the dissolution is effected at elevated temperature up to the boiling point of the solvent, whereupon the solution is cooled to about 20 C.
  • a portion of the polyethylene precipitates in this manner in the form of gel, the liquid moiety of which is a solution of the remaining portion of the polyethylene in the used solvent. This liquid polyethylene solution moiety of the gel at 20 C.
  • polyethylene should contain polyethylene in dissolved state amounting to at least 0.7 and at most 1.7% by weight of the solution, whereas the greater amount of the polyethylene is the solid component of the gel.
  • the particular polyethylene types, the quantity ratio of mixed polyethylene types and the suitable solvent, any within the definitions given hereinabove, should be chosen so as to obtain a preparation in which the indicated polyethylene content in the liquid moiety of the gel, to wit, 0.7 to 1.7% by weight at 20 C., is realized. From a practical point of view, solution tests may first be carried out in order to determine the proper choice. Such a test may be performed as follows:
  • a hot clear solution containing the polyethylene or polyethylene mixture and the solvent in composition and quantity ratio corresponding to the intended production is prepared and then cooled to about 20 C. while stirring. At the end of cooling an opaque mixture is formed due to the gel formation. The viscosity of this mixture strongly increases. The weighed portion of this mixture is then centrifuged at 3000 revolutions per minute for two hours. Dependent on the density of the solvent, the polyethylene gel will collect on top or at the bottom of the centrifuging vessel. The supernatant or subjacent clear solution, as the case may be, is then carefully withdrawn.
  • a glass pipe is vertically pushed through the gel layer and into the solution, the bottom opening of the glass pipe being closed by an easily penetrated or ruptured material, such as a foil or cork.
  • the other opening of the glass pipe should project somewhat above the level of the centrifuging vessel. The centrifuging is thereupon continued until the gel, which has been somewhat disturbed by the insertion of the pipe, has again collected on top of the solution and the solution is clear.
  • the closure in the lower opening of the pipe is then removed or ruptured, whereupon the clear solution is sucked through the pipe, for example by an ordinary hollow needle-suction device as, for example, an injection syringe arrangement as used for medical purposes.
  • the content of polyethylene is then gravimetrically determined in the withdrawn solution as dry residue.
  • the hereinabove described polyethylene gel which at 20 C. has a condition fit for the coating procedure, is applied either to that face of the paper carrier whose depressions are filled with the enveloped pigment particles or to one surface of a receiving sheet.
  • the thus coated carrier is carefully dried, for example, by a slightly heated air flow. In this manner is removed the excess solvent from the liquid moiety of the gel.
  • a transferinducing layer in the form of an immobilized gel is formed, which is a network of solid polyethylene components in which a residue of at most 10% by weight of liquid solution is retained which, calculated on the amount of this solution moiety, contains between 0.7 to 1.7% by weight of polyethylene in dissolved form.
  • the use of the transfer-inducing layer in the form of an immobilized gel has the advantage that the intramolecular liquid of the gel, which contains dissolved portions of the polyethylene, exhibits excellent adhesive characteristics suitable for transfer purposes.
  • the limit values of the dissolved polyethylene in this liquid moiety of the gel should advantageously be within the indicated range of 0.7 to 1.7% by weight at 20 C. in order to obtain the optimum effect of the inventive transfer system.
  • such transfer-inducing layer has a long shelf life.
  • the transfer-inducing layer can be directly coated onto the color containing face of the carrier, whereby the polyethylene layer will be adhesively bonded to said face.
  • the transferinducing layer may instead be applied as surface layer of the receiving sheet.
  • the pigment particles which are transferred from the color carrier under pressure are also lodged in smearand smudgeresistant manner on the receiving sheet.
  • those sheets which are arranged below the first sheet adapted to receive the writing may be provided on their upper face with the transfer-inducing polyethylene layer and on the rear or opposite face with the coated pigment particles.
  • FIG. 1 shows an exploded view of one embodiment of the inventive transfer system in vertical section
  • FIG. 2 shows a second embodiment of this system in exploded view
  • FIG. 3 shows a transfer sheet suitable for use in sets
  • FIG. 4 is a plan view of a transfer sheet without transfer-inducing layer.
  • the transfer system of FIG. 1 comprises a transfer sheet, generally indicated by reference numeral 10, and a receiving sheet 8.
  • the transfer sheet comprises a carrier sheet 1 of paper whose bottom face is provided with a number of depressions 2 which are spaced from each other and which have a depth of about 10 to 60% of the thickness of the paper carrier.
  • the depressions 2 are separated from each other by ridges or protuberances 3 formed by paper fibers extending on the surface of the paper carrier 1.
  • Pigment particles 4, coated with vinyl polymers, are lodged within the depressions 2.
  • the ridges or protuberances 3 are free from any pigment particles.
  • a polyethylene gel layer 7 of the indicated nature is superimposed on the color-containing face of the paper carrier 1.
  • Reference numeral 8 indicates an ordinary paper sheet. During use the transfer sheet 10 is placed on the receiving sheet 8 and upon application of writing pressure the transfer-inducing polyethylene layer 7 will remove pigment particles 4 and lodge them on the receiving sheet 8.
  • the polyethylene layer 7 is applied to the receiving sheet 8' and not to the color-containing face of the paper carrier 1.
  • the embodiment of FIG. 2 is otherwise the same as that of FIG. 1, the paper carrier 1' having a number of depressions 2' which are separated by ridges 3, coated pigment particles 4 being lodged within the depressions.
  • FIG. 3 shows an embodiment wherein the transfer sheet 10" contains both a receiving surface and color for transfer purposes.
  • the paper carrier 1" is, as in the previous embodiments, provided with a number of depre'ssions 2" which accommodate the vinyl polymercoated pigment particles 4".
  • the polyethylene gel layer 7" is applied to the opposite face of the paper carrier 1".
  • This embodiment is particularly suitable for use in sets of sheets for the production of multiple copies.
  • the uppermost sheet in the set corresponds to the transfer sheet 10' of FIG. 2, the remaining sheets to be arranged subjacent the top sheet can then suitably be of a construction as shown in FIG. 3.
  • FIG. 4 shows a plan view of a transfer sheet in which the enveloped pigment particles 40 are seen as being EXAMPLE I
  • Preparation 112 for preparing polyethylene gel Parts by weight Polyethylene (average, molecular weight 2000; melting point 102-106" C.; viscosity at 140 C.: 220 cps.; specific gravity: 0.92; penetration at g., 5 seconds, 77 F.: 0.20.3) Carbon tetrachloride Total 100.0
  • a paper web was used as carrier.
  • the paper web had a thickness of 40 4.
  • the surface of the paper carrier had numerous depressions of a depth of 10 to 60% of the paper thickness.
  • the individual depressions were spaced from each other by about 1 to 50 and were separated from each other by surface ridges or protuberances.
  • Preparation Ia was applied to the paper web by means of a customary application means. Excess was then wiped off by means of a doctor blade which contacted directly the ridges on the paper surface so that merely the depressions Were filled with the color preparation While the ridges or protuberances remained free.
  • Preparation Ib was then applied on top of the face of the paper web which had the pigment-filled depressions.
  • Preparation Ib at the time of the application exhibited an immobilized gel forming aggregating condition. This was obtained by heating the application roller used for the application and the tub which contained the preparation, to a temperature at which the polyethylene was completely dissolved, whereupon the solution was cooled until gel formation set in. If necessary, and in order to prevent any penetration of the liquid through or into the carrier, the process may be accelerated by cooling. Any excess of the polyethylene material could be removed, for example, by means of a wiper or doctor blade. The layer was then dried to remove the excess solvent whereupon the coated Web was rolled up.
  • the polyethylene layer is anchored at the pigment particles primarilyby the residue of polyethylene which remains dissolved in the gel. In this case the dissolved portion of polyethylene amounts to about 1.1% by weight of the applied gel.
  • the thus formed transfer-inducing layer had a weight of about 1-5 gram per square meter.
  • Preparation IIb for obtaining transfer-inducing polyethylene gel layer Parts by weight Polyethylene (average molecular weight 2000, melting point 100-106 C., viscosity at 140 C.: 220 cps., specific weight: 0.92, penetration at 100 g.,
  • a paper web of 60 thickness was used as carrier material.
  • the web had the depression-ridge formations as indicated in Example I.
  • This paper carrier was coated with preparations Hu and Ilb in the same manner as explained in Example I.
  • the residue of polyethylene which remains in dissolved condition in the gel amounted in this example to about 1.2 parts by weight of the total weight of the gel.
  • Preparation IIIIJ polyethylene gel Parts by weight Polyethylene (average molecular weight 2000, melting point 100-106 C., viscosity at 140 C.: 220 cps., specific weight: 0.92, penetration at 100 g.,
  • Preparations HM and EU are applied to a paper carrier of p. thickness in the manner described in connection with Example I.
  • the paper carrier has the surface depressions as previously described.
  • About 1.6 parts by weight of the polyethylene remain in dissolved condition, calculated of a total weight of the polyethylene gel applied to the carrier.
  • the transfer sheets according to the invention may be used, for example, for telex rolls, bookkeeping rolls, endless forms, sets of forms for typewriters and office duplicating machines, for example Rotaprint machines, Adrema machines, daily summaries for banks, paying-in and out instructions, transfer forms, weighing cards, weight lists,
  • stick-on address labels express cards with a duplicating and stick-on address, consignment notes, police reporting forms, cash register rolls, wage lists and wage accounting systems.
  • a pressure responsive transfer system for the production of copies comprising:
  • a paper carrier having first and second faces and having a thickness of about 20-80a( at least one of said first and second faces defining a plurality of depressions of a depth of about 10-60 percent of the thickness of the paper carrier, said depressions being spaced from each other by distances of about 1-S0a and being separated by protruding areas of said one face;
  • a transfer inducing layer interposed between said one face and a receiving material, said transfer inducing layer having a weight of about 1-5 grams per square meter of layer, said transfer inducing layer comprising an immobilized gel consisting of at least one polyethylene of an average molecular weight of about 1500-2000, a melting point of about -110" C., a viscosity at 140 C. of about 100-250 cps., a specific weight of about 0.92 and a penetration hardness of about 0.2-4.0 as determined with 100 grams for 5 seconds at a temperature of 77 F.
  • said vinyl polymer enveloping said pigment particles consists of polyvinyl acetate having an average molecular weight of between about 20,000 and 50,000.
  • a system as claimed in claim 1, wherein said vinyl polymer enveloping said pigment particles consists of polyvinyl alcohols with an acetyl content of about 12%.
  • said vinyl polymer enveloping said pigment particles is a vinyl chloride-vinyl acetate mixed polymer having a content of vinyl chloride of about 80 to and a vinyl acetate content of about 10 to 20% as well as having a K value of about 40 to 65.
  • liquid solvent of said polyethylene solution included in the gel essentially consists of a liquid aliphatic hydrocarbon of 6 to 12 carbon atoms or of a liquid aliphatic chlorinated hydrocarbon of 1 to 6 carbon atoms.
  • a pressure responsive transfer sheet comprising:
  • a carrier having first and second faces and having a thickness of about 20 to 8011., at least one of said faces defining a plurality of depressions of a depth of about to 60% of the thickness of the carrier, said depressions being spaced from each other by distances of about 1 to 50
  • a plurality of pigment particles lodged within said depressions said pigment particles being of a smaller size than the size of the depressions, each of said pigment particles being enveloped by a coat of a binding agent comprising an elastic vinyl polymer, said coat constituting about to 25 of the weight of the pigment particles;
  • a transfer-inducing layer coated onto said one face of said carrier comprising an immobilized gel consisting of at least one polyethylene of an average molecular weight of about 1500 to 2000, a melting point of about 80 to 110 C., a viscosity at 140 C. of about 100 to 250 cps, a specific weight of about 0.92 and a penetration hardness of about 0.2-4.0 as determined with 100 grams for 5 seconds at a temperature of 77 F.
  • a pressure-responsive transfer system for the production of copies comprising:
  • a carrier having first and second faces and having a thickness of about to 80a, at least one of said faces defining a plurality of depressions of a depth of about 10 to 60% of the thickness of the carrier, said depressions being spaced from each other by distances of about 1 to 50 lb) a plurality of pigment particles lodged within said depressions, said pigment particles being of a smaller size than the size of the depressions, each of said pigment particles being enveloped by a coat of a binding agent comprising an elastic vinyl polymer, said coat constituting about 15 to by weight of the weight of the pigment particles;
  • a receiving sheet said receiving sheet being coated with a transfer-inducing layer, said transfeninducing layer comprising an immobilized gel consisting of at least one polyethylene of an average molecular weight of about 1500-2000, a melting point of about 80-110 C., a viscosity at 140 C. of about 100-250 cps., a specific weight of about 0.92 and a penetration hardness of about 0.2-4.0 as determined with 100 grams for 5 seconds at a temperature of 77 F.
  • a transfer-inducing layer said transfeninducing layer comprising an immobilized gel consisting of at least one polyethylene of an average molecular weight of about 1500-2000, a melting point of about 80-110 C., a viscosity at 140 C. of about 100-250 cps., a specific weight of about 0.92 and a penetration hardness of about 0.2-4.0 as determined with 100 grams for 5 seconds at a temperature of 77 F.
  • a process of producing a pressure responsive transfer system which comprises the combination of the following process steps:
  • a process of producing a pressure responsive transfer system which comprises the combination of the following process steps: preparing a carrier sheet of a thickness of about between 20-80n and having on at least one of its faces a plurality of surface depressions which are spaced from each other by distances of about 1 to 50 said depressions having a depth of about 10 to 60% of the thickness of the carrier, mixing pigment particles of a particle size smaller than the size of said depressions with about 15 to 25% by weight, calculated on the weight of the pigment particles, of an elastic vinyl polymer binding agent, said binding agent being dissolved in a solvent which does not dissolve the pigment particles, whereby the pigment particles become enveloped by said binding agent, filling the enveloped pigment particles into the depressions of said carrier, dissolving 2 to 7 parts by weight of polyethylene in 93 to 98 parts by Weight of a solvent at the boiling temperature of the solvent, said polyethylene being defined by an average molecular weight of about 1500-2000, a melting point of about 80-100 C., a viscosity at C.
  • a process of producing a pressure responsive transfer system which comprises a combination of the following process step: preparing a carrier sheet of a thickness of about between 80/L and having on at least one of its faces a plurality of surface depressions which are spaced from each other by distances of about 1 to said depressions having a depth of about 10 to of the thickness of the carrier, mixing pigment particles of a particle size smaller than the size of said depressions with about 15 to 25% by Weight, calculated on the Weight of the pigment particles, of an elastic vinyl polymer binding agent, said binding agent being dissolved in a solvent which does not dissolve the pigment particles, whereby the pigment particles become enveloped by said binding agent, filling the enveloped pigment particles into the depressions of said carrier, dissolving 2 to 7 parts by Weight of polyethylene in 93 to 98 parts by weight of a solvent at the boiling temperature of the solvent, said polyethylene being defined by an average molecular weight of about 1500-2000, a melting point of about 100 C., a viscosity at C.
  • a polyethylene gel is obtained, applying the gel to one surface of a receiving sheet and drying the gel layer to obtain an immobilized gel layer, to wit, a network of solid aggregates of said polyethylene in which a liquid solution of said polyethylene is held, said solution amounting to at the most 10% of the weight of said network and containing the dissolved polyethylene in an amount of at least 0.7 and at the most 1.7% of the weight of this solution.

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  • Color Printing (AREA)
  • Duplication Or Marking (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Paper (AREA)
  • Laminated Bodies (AREA)
US49767065 1965-10-19 1965-10-19 Pressure responsive transfer system and process of making Expired - Lifetime US3410712A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US49767065 US3410712A (en) 1965-10-19 1965-10-19 Pressure responsive transfer system and process of making
ES0332356A ES332356A1 (es) 1965-10-19 1966-10-17 Sistema de transferencia sensible a la presion para la produccion de copias.
FR80251A FR1496884A (fr) 1965-10-19 1966-10-17 Système de transfert d'écriture, ou analogue, sensible à une pression et procédé pour sa réalisation
GB4684966A GB1171926A (en) 1965-10-19 1966-10-19 Improvements in or relating to Transfer Systems.
CH1513566A CH466338A (fr) 1965-10-19 1966-10-19 Article en feuille pour le transfert par pression et procédé de fabrication d'un tel article
BE688459D BE688459A (instruction) 1965-10-19 1966-10-19

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US49767065 US3410712A (en) 1965-10-19 1965-10-19 Pressure responsive transfer system and process of making

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US3410712A true US3410712A (en) 1968-11-12

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US (1) US3410712A (instruction)
BE (1) BE688459A (instruction)
CH (1) CH466338A (instruction)
ES (1) ES332356A1 (instruction)
GB (1) GB1171926A (instruction)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140335A (en) * 1976-04-05 1979-02-20 The Standard Register Company Form fastenings
US5273805A (en) * 1991-08-05 1993-12-28 Minnesota Mining And Manufacturing Company Structured flexible carrier web with recess areas bearing a layer of silicone on predetermined surfaces
US5413839A (en) * 1990-07-12 1995-05-09 Thomas De La Rue & Company Limited Transfer film

Citations (6)

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Publication number Priority date Publication date Assignee Title
US3169880A (en) * 1960-12-23 1965-02-16 Strauss Eugen Transfer sheet and sheet assembly
US3203832A (en) * 1962-02-25 1965-08-31 Carbon Paper Co Ltd Method of manufacturing copying papers and a copying paper
US3226134A (en) * 1961-12-14 1965-12-28 Ancar A G Fa Sets of reproduction transfer sheets
US3243312A (en) * 1961-10-11 1966-03-29 Koreska Gmbh W Direct-transfer copy sheet
US3256107A (en) * 1960-12-23 1966-06-14 Kores Mfg Corp Transfer sheet
US3294571A (en) * 1962-05-18 1966-12-27 Petits Fils De Leonard Danel Sheets of coated paper

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3169880A (en) * 1960-12-23 1965-02-16 Strauss Eugen Transfer sheet and sheet assembly
US3256107A (en) * 1960-12-23 1966-06-14 Kores Mfg Corp Transfer sheet
US3243312A (en) * 1961-10-11 1966-03-29 Koreska Gmbh W Direct-transfer copy sheet
US3226134A (en) * 1961-12-14 1965-12-28 Ancar A G Fa Sets of reproduction transfer sheets
US3203832A (en) * 1962-02-25 1965-08-31 Carbon Paper Co Ltd Method of manufacturing copying papers and a copying paper
US3294571A (en) * 1962-05-18 1966-12-27 Petits Fils De Leonard Danel Sheets of coated paper

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140335A (en) * 1976-04-05 1979-02-20 The Standard Register Company Form fastenings
US5413839A (en) * 1990-07-12 1995-05-09 Thomas De La Rue & Company Limited Transfer film
US5273805A (en) * 1991-08-05 1993-12-28 Minnesota Mining And Manufacturing Company Structured flexible carrier web with recess areas bearing a layer of silicone on predetermined surfaces
US5462765A (en) * 1991-08-05 1995-10-31 Minnesota Mining And Manufacturing Company Structured flexible carrier web bearing a layer of silicone on predetermined surfaces

Also Published As

Publication number Publication date
BE688459A (instruction) 1967-03-31
GB1171926A (en) 1969-11-26
ES332356A1 (es) 1967-08-01
CH466338A (fr) 1968-12-15

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