US3186862A - Pressure-sensitive transfer sheets - Google Patents

Pressure-sensitive transfer sheets Download PDF

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Publication number
US3186862A
US3186862A US22269A US2226960A US3186862A US 3186862 A US3186862 A US 3186862A US 22269 A US22269 A US 22269A US 2226960 A US2226960 A US 2226960A US 3186862 A US3186862 A US 3186862A
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color
layer
yielding
sheet
paper
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US22269A
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English (en)
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Reuter Walter
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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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/914—Transfer or decalcomania
    • 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.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24893—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material
    • Y10T428/24901—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including particulate material including coloring matter
    • 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.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24934—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including paper layer
    • 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.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified

Definitions

  • This invention relates to the preparation of sheets, especially paper, having a color-yielding layer, which can transfer script characters or color by stylus pressure onto another sheet having as especially prepared surface, without the use of any intermediate transfer papers.
  • this invention also includes various physical embodiments of these sheets which have particular commercial uses.
  • the principal object of the present invention is to provide novel transfer sheets, wherein the coloryielding layer is smudge-proof, and wherein color is yielded upon pressure only to specially prepared surfaces.
  • Another object of this invention is to provide a color transfer sheet, wherein the color layer is masked by a thin film which eliminates any visual impression that the color layer is susceptible to smudgin g.
  • Still another object is to provide a dual purpose color transfer sheet, wherein one side is especially prepared to receive color, and wherein the other side is prepared to yield color.
  • Still another object of this invention is to provide a grating on the color-yielding layer to increase its coherence and adherence during and after use.
  • FIGURE 1 is a transfer sheet according to the invention in cross-section.
  • FIGURE 2 is a set consisting of several such sheets.
  • FIGURE 3 shows the reverse side of a transfer sheet as an example.
  • FIGURE 4 shows the front side as an example.
  • FIGURE 5 shows diagrammatically a telegraph roll with four usable paper transfers.
  • FIGURE 6 is a section through the uppermost sheet of a set of a telegraph roll according to FIGURE 5.
  • FIGURE 7 is a section through a sheet which lies under the first layer of a set of a telegraph roll according to FIGURE 5.
  • FIGURE 8 is a section through the last sheet of a writing set of a teletype machine according to FIGURE 5.
  • FIGURE 9 is a section through a script transfer sheet.
  • FIGURE 10 is a section through a sheet receiving script.
  • FIGURE 11 is a section through a script transfer sheet.
  • FIGURE 12 is a section through a script receiving sheet.
  • the color-yielding layer which is applied on the reverse side of the sheets and the color-receptive layer which is on the front side of the sheets are formed in a novel way so that the sheets which carry the ink layer on the reverse side do not yield their color to ordinary paper upon stylus pressure; by using specially prepared color-receptive sheets, however, one can reproduce script, drawings and the like in full sharpness.
  • the coatings of the invention are formed in such a Way that they are substantially resistant to temperature, humidity, and light.
  • the coloryielding layer contains inorganic pigments such as, barium sulfate, chromic hydroxide, chromic oxide (green), chrome yellow, carbon black, ultramarine, titanium dioxide, sodium aluminum sulphate, and others or synthetic pigments such as milori blue.
  • inorganic pigments such as, barium sulfate, chromic hydroxide, chromic oxide (green), chrome yellow, carbon black, ultramarine, titanium dioxide, sodium aluminum sulphate, and others or synthetic pigments such as milori blue.
  • small quantities (about 12% by weight of inorganic pigment) of organic coloring matters, e.g. alizarin coloring substances can be mixed in with binders.
  • This coloryielding layer can also contain plastics, especially natural or synthetic resins, e.g. methyl cellulose in emulsion with natural or synthetic resins, rosin, abietic acid, pimaric acid, a kyd resins, or similar synthetic resins having binding properties. These plastics may also contain
  • This color-yielding layer can be applied fully or partly on the reverse side of the sheets in amounts of about 2 to 16 g./sq. m.-corresponding to thicknesses of about 0.005 mm. to 0.05 mm.
  • Coloring layers produced in such a way have excellent color intensity so that they yield very good copies under stylus pressure even when a large number of sheets are superimposed, e.g. 6 to 8 sheets.
  • An excess of colloidal binders can preferably be used or the coagulation can be carried out only partly, or further colloidal binders, preferably synthetic resin mixtures of natural or synthetic resins and the like, can be added after coagulation.
  • the binders used for the stabilization or selectivity of the color-yielding layer e.g. colloidal synthetic resin salts, can be dispersed or dissolved in a different carrier.
  • organic pigments in conjunction with organic dyes, such as alizarin, or the latter can be used alone.
  • softeners or plasticizers for the color-yielding layer the following substances, for example, can be used in small quantities: sulfon-ated neats-foot oil, phthalates, polyhydric alcohols like glycerine, glycols, and the like.
  • the rheological properties of the medium in which the color-yielding layer is suspended is controlled by the use of suitable organic solvents, such as, benzene, aliphatic hydrocarbons, alcohols, esters, ketones, halogenated hydrocarbons and mixtures thereof.
  • suitable organic solvents such as, benzene, aliphatic hydrocarbons, alcohols, esters, ketones, halogenated hydrocarbons and mixtures thereof.
  • substances having microcrystalline structure are particularly suitable.
  • Such substances are, for example, wax-like substances, like ceresin, isoceresin or mixtures of such substances with parafiin, metal soaps or synthetic resins like polyisobutylene. It is also possible to use mixtures of synthetic resins with amorphous colorless or slightly colored bodies, like silicates and the like, which are embedded into the layer of synthetic resin. It is also noteworthy that this microcrystalline layer can be either colored or uncolored.
  • the thickness of the specially prepared colorreceptive layer is about 0.002 mm. to about 0.015 mm.
  • the hardness of the color-yielding layer can be controlled by the addition of wax-like substances or mixtures of such substances with synthetic resin solutions or emulsions.
  • a decrease in hardness, for example, can be obtained by an. increase in the wax content in the coloring layer to at least about to which addition, makes it possible to obtain color-yielding layers which, though suificiently adherent, can yield color to ordinary papers having untreated surfaces. It is necessary, therefore, to maintain a lower concentration of wax in the color-yielding layer.
  • the coagulation of the colloidal dispersion which is used for the formation of the coloring layer can be car: ried out as previously described by the addition of electrolytes, especially aqueous metal salt solutions. Coagulation can also take place by heating or adding oppositely charged colloids or by other measures by which the dispersed condition of the colloid contained in the layer is transferred into a non-soluble gel.
  • the colloidal layer is, of course, made as thin as possible so that the coloring layer which has been produced by the simultaneously coagulated particles of a suitable synthetic resin solution is sufliciently coherent.
  • the coagulated layer can, for example, be produced by coagulating a suitable aqueous colloidal solution (e.g. a glue solution or Water-soluble cellulose ester or ether) with an aqueous solution of aluminum sulphate, with the help of a positive aluminum hydroxide sol.
  • colloids within the scope of the present invention, it is possible to use, for example, lyophilic spherocolloids or linear colloids, e.g. solutions of cellulose esters, cellulose others, or mixture of lyophobic dispersion colloids, with sufiicient quantities of protective colloids or molecular colloids, respectively.
  • coagulating salts it is possible, for example, not only to use alkali metal salts such as sodium salts, but also heavy metal salts such as lead salts, and the like.
  • the most important properties of the color-yielding layer resides in the fact that it is grip-fast and wipe-fast i.e. that it does not smudge in use and that the color cannot be transferred by stylus pressure onto ordinary paper but only onto a paper having a prepared surface. Although these properties are actually attained by both the color-yielding layers and the color-receptive layer disclosed in the present invention, the external appearance of the color-yielding layer gives one the impression that material can be rubbed off. Naturally, this appearance is a disadvantage from both the aesthetic and psychological standpoints.
  • the present invention provides still another embodiment, wherein transfer sheets or rolls, as previously described, can be made insuch a way that they look like ordinary white or tinted sheets resins and copal resins and the like.
  • This covering layer can, for example, consist of a lacquer-like coating as obtained from watersoluble casein paints 'or other paint mixtures having synthetic resin vehicles. After drying, the films are both waterproof and smudge-proof.
  • This color-covering layer can also be provided with suitable additive like liquid and solid plasticizers, natural resins, synthetic resins or mixtures thereof dissolved in suitable solvents.
  • a thin covering layer imparts to the sheet a pleasing smooth appearance which hides the color-yielding layer so that there is no impression that such sheets cannot be used without the effects of smudging and smearing.
  • This covering layer consisting of preferably white, or slightly tinted mixtures corresponding to the hue of the paper, is so thin that it is destroyed under stylus pressure. It has even been surprisingly found that sheets provided with such a color-covering layer yield an even sharper copy than sheets without it. Thereby it is also possible to use for the script transferring color layer, deeper color mixtures like deep black, deep blue, brown mixtures and the like which result in a sharpness of script on the color-receptive sheet which could not be obtained without such a covering layer.
  • binders can be used, for example, casein, dextrin, mixtures of natural and synthetic resins, such as mixtures of polyvinyl
  • the covering power or opacity of the outer coating can be obtained by the use of white pigments,-e.g. by titanium dioxide, zinc white, finely divided chalk and the like; or, the covering layer can be colored like the hue of the paper, by the addition of colored pigments.
  • the incorporation of plasticizers and the like function to impart sufiicient elasticity to the covering layer so that it will not crack.
  • the described covering layers can be used with each type of color-yielding layer as long as the components of each layer are compatible with and do not react with one another.
  • the thinness of the covering layer can be varied in accordance with the composition of the layer.
  • the cover layer must have such covering strength and must be applied in such a way that the color characters of the script yielding layer is completely covered, whereas, on the other hand, the white or colored covering layer must be so thin that it is completely destroyed under stylus pressure, especially the pressure exerted by typewriter keys, so that transferred characters appear in complete sharpness on the script receiving sheet.
  • Papers provided with this covering layer can be used in all forms suitable for writing or printing, e.g. as rolls, telegraph rolls, addition rolls, punch-card rolls, and the like.
  • the color-yielding side of a transfer sheet can be printed upon with black, colored, or white characters. It is, therefore, now possible to provide this color-yielding layer with any desired patterns or pictorial designs, with descriptions, etc. In contrast, there was no such possibility with script and transfer copy papers of the prior art, since such papers could only be provided with printing on the obverse side; the color-yielding layer was not suitable for printing because of its dark colors, its consistency, and the likelihood that the uniformity and transferability of the layer would be deleteriously modified.
  • the colored printing which can be applied onto the color-covering layer can obviously appear in different forms. It can be a colored or pictorial coating, e.g. the imprint of a certain continuously repeated pattern or any pictorial or geometric design. (Naturally, if light colors are used in printing, this can add to the coloring effect of the covering layer.)
  • the color-covering layer itself can be applied in the form of a grating, preferably by printing. This technique yields substantially the same eifects as described above, and is also especially simple and advantageous.
  • the color-covering layer itself is applied in the form of a grating, white or slightly colored lines appear on the black or very dark base of the coloring layer whereby the degree of brightness can be increased by a narrow grating. At any rate, a white or light colored grating removes the impression that the color-yielding is not smudge-proof.
  • the grating lines can be dark in color. In this case the impression of smudge-proof paper is made under all circumstances, regardless of the effects described above.
  • the lines of the grating should be about from 0.1 mm. to 1.0 mm. in width, and the space in between them should be about 0.05 mm. to about 1.0 mm.
  • the brightening colorcovering layer in patterns or pictures other than in the form of a grating. It is advisable, however, in such a case, to make the patterns or other pictorial representations sufiiciently fine and to cover the color-yielding surface of the paper uniformly.
  • the special advantage of the present invention lies in the fact that a color-yielding paper can now be provided with pictorial representations not only on the non-color side, as in the past, but also on the color side. These pictorial representations can also serve to make the color side easily distinguishable from the reverse side.
  • the sheets or foils, according to the invention, for making transfer copies have the advantage over other transfer copy methods in that no carbon or special intermediate transfer papers are needed. This is advantageous for the use of both rolls and multiple sheets since the insertion of carbon paper and subsequent removal thereof are not necessary.
  • the coatings can be applied in any known manner, e.g. by spraying, rolling, etc.
  • the color application can cover the entire surface or only strips of the paper, likewise for the prepared front side. Additionally, it is also possible to avoid undesirable copies in certain areas by covering alternately the color-yielding or color-receptive side by suitable means, e.g. by overprinting.
  • the foils or sheets can be white or colored. It is thus possible to provide colored papers or colored sheets on the reverse side with a colored layer corresponding to the color of the paper so that the color preparation is not noticeable. An inadvertent interchanging of the sides of such foils can be avoided by providing one or both sides thereof with a suitable marking, preferably at the edge. It is also possible to mark in the described manner telegraph rolls at one or both longitudinal edges, which marks indicate the consumption of the roll.
  • An advantage of the method according to the invention is the extreme sharpness and good legibility of the transferred characters even with a large number of copies. Another advantage is that the transfer is possible at all temperatures.
  • the color mixtures and color-receptive layers are temperature-proof, weather-proof and lightproof, which properties are important for use in the open air, in the tropics or Arctic countries.
  • the invention is particularly useful in the fabrication of rolls and manifolds. Since no carbon papers are used, the diameter of a telegraph roll is decreased considerably. Accordingly, it is possible to have much longer rolls with the same space as rolls interleaved with carbon papers. Similar advantages are obtained in the use of manifolds.
  • the numeral 1 in FIGURE 1 indicates the transfer foil, e.g. a paper sheet.
  • the reverse side of this paper sheet is covered with a layer 2 containing mixtures of inorganic pigments and/ or organic coloring matter with fillers and with natural or synthetic resins and plasticizers, wherein the proportions occur in certain ratios.
  • the front side of sheet 1 is provided with a layer 3 receiving this color coating upon pressure transfer.
  • This layer has been treated with microwaxes or microcrystalline wax mixtures (composition waxes) or with substances having similar properties.
  • FIGURE 2 several paper sheets of the type according to FIGURE 1 are united in a transfer set.
  • the sheets can be interconnected at one edge of the set, e.g. by a glue edge 4 or by a binding.
  • the uppermost sheet 5 is prepared only on the reverse side in the set shown in FIGURE 2. It can, however, also be prepared on the front side.
  • the lowermost sheet of the set can only be prepared on the front side, although a color layer on the reverse side would not be deleterious.
  • the paper sheet has been coated only partly on its reverse side.
  • the surfaces 6 do not transfer, whereas the areas 7 with the color mixture according to the invention, react to pressure.
  • the telegraph or teletype roll consists only of usable paper strips 12, 13, 14 and 15 as distinguished from the known embodiments wherein carbon paper is interleaved.
  • the reverse sides of strips 12, 13 and 14 are prepared with a layer 15, each, which layers transfer coloring matter upon exertion of stylus pressure onto a sheet positioned underneath which is prepared with a wax or paraffin layer 17. There is no transfer, however, onto ordinary writing paper.
  • the upper surface of the uppermost sheet 12 can have a wax preparation or not, Whereas the upper sides of strips 13, 14 and 15 are provided in each case with a wax layer 17.
  • the reverse side of the last sheet, 15, can be provided with or without a color layer.
  • One or both longitudinal edges of the strip 12 can have measuring markings 18 which indicate the degree of consumption of the roll.
  • the numeral 19 is a sheet, a roll or another suitable foil;
  • the numeral 20 is a grey color layer applied onto the paper and suitable for transfer, which layer is smudge-proof, coherent and waterproof.
  • a thin layer of colored covering layer 21 has been applied which is also completely coherent, smudge-proof and waterproof because of a binder causing these properties, especially casein or plastic.
  • a script receiving layer 22 is applied onto the other side of sheet 19, which layer consists, for example, of waxes, wax mixtures, mixtures of wax and resin and the like.
  • FIGURE ll shows a paper script 23 or the like carrying a dark colored coloring layer 25.
  • the numeral 26 indicates a light colored covering layer.
  • This layer carries pictorial representations, e.g. a grating 2'7.
  • a layer 28 has been applied onto that side of sheet 23 which receives the transferred characters.
  • This layer may consist of waxes, wax mixtures, mixtures of wax and resin and the like.
  • a covering layer 29 and a covering layer 30 and a light-colored covering layer 30 are applied, the latter having the form of a grating in this case.
  • the invention lies broadly in the physical relation of suitable components, such as the binder and the pigment of the color-yielding (script-yielding) layer.
  • suitable components such as the binder and the pigment of the color-yielding (script-yielding) layer.
  • the important criterion in this case is that upon stylus pressure, this layer will not yield color to ordinary untreated paper.
  • pigmerits and binders that can be used to obtain this effect.
  • new synthetic resins and polymers, as well as new inorganic pigments, synthetic pigments and organic pigments are constantly being developed and made commercially available, many of which undoubtedly will be found adaptable as components of the color-yielding layer.
  • Example 1 To a sheet of paper having a thickness of about 0.05 mm., there is applied a color-yielding layer having a thickness of about 0.01 mm. and having the following composition which includes both inorganic and organic coloring matter:
  • the synthetic resin having been dissolved at a ratio of 1:20 in the solvent.
  • Example 2 To a sheet of paper having a thickness of about 0.05
  • Example 3 To the sheet prepared in accordance with Example 1, a color-receptive layer is applied to the obverse side of said sheet, said color-receptive layer having a thickness of about 0.006 mm. and having the following composition:
  • each layer of the present invention is a normally solid, non-tacky megascopically homogeneous film.
  • a pressure-sensitive color-transfer sheet consisting essentially of:
  • a color-yielding layer of about 0.005 mm. to 0.05 mm. thickness superimposed on one side of said sheet of paper, said color-yielding layer comprising a dry megascopically homogenous film containing coloring matter and a non-rubbery, resinous binder selected from the group consisting of vinyl chloride acetate resins, alkyl resins, rosin, copal resin, cellulose ethers, cellulose esters, casein, abietic acid, and pimaric acid, said coloring matter comprising predominantly inorganic pigments and a small amount of organic pigments, said color-yielding layer being capable of transferring color to treated paper upon the exertion of stylus pressure, said color-yielding layer also being grip-fast and Wipe-fast,
  • a smear-proof and water-proof color-covering layer of about 0.005 mm. to about 0.02 mm. thickness superimposed on said color-yielding layer, said colorcovering layer being of sufiicient thickness to substantially mask the color of the color-yielding layer and being suificiently thin so that upon the exertion of stylus pressure, it will break allowing color to be transferred from the color-yielding layer,
  • a grating-like layer having lines of about 0.1 mm. to 1.0 mm. in width, the space between said lines being about 0.05 mm. to about 1.0 mm., said grating-like layer being imprinted on said color-covering layer, whereby the color-covering layer and the coloryielding layer are strengthened,
  • a color-receptive layer of about 0.002 mm. to about 0.015 mm. thickness superimposed on the other side of said sheet of paper, said color-receptive layer consisting essentially of waxy substances having a microcrystalline structure.
  • the color-transfer sheet of claim 1 wherein the color-yielding layer comprises 40-60 parts by weight titanium dioxide, 0.5-2 parts by weight alizarin blue, and 2-7.5 parts copolymer of vinyl chloride and vinyl acetate, the color-covering layer comprises in parts by weight, 60-120 parts casein, 3-12 parts ammonia, 60-120 parts titanium dioxide, 2-6 parts carbolic acid, and 15-50 parts of a non-drying oil, and the color-receptive film comprises in parts by weight 88 parts ozocerite having a solidification point of 79-82 C., 10 parts paraffin having a solidification point of 50-52 C. and 2 parts polyisobutylene.
  • the color transfer sheet of claim 1 wherein the thickness of the paper is 0.05mm., the thickness of coloryielding layer is 0.01 mm., and the film comprises 40-60 parts by weight titanium dioxide, 0.5-2 parts by weight alizarin blue, and 2-7.5 parts copolymer of vinyl chloride and vinyl acetate.
  • the color transfer sheet of claim 1 wherein the thickness of the paper is about 0.05 mm., the thickness of the color-yielding layer is 0.01 mm., and the layer comprises 5-10 parts by Weight alizarin blue, -20 parts by weight colloidal cellulose ether, and 3 parts by Weight cobalt naphthenate.

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  • Color Printing (AREA)
  • Duplication Or Marking (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Decoration By Transfer Pictures (AREA)
US22269A 1959-03-02 1960-04-14 Pressure-sensitive transfer sheets Expired - Lifetime US3186862A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH7024259A CH369152A (de) 1959-03-02 1959-03-02 Verfahren zur Herstellung von aus mehreren Blättern bestehenden, zur Anfertigung von Durchschriften dienenden Schreibsätzen
DER0025339 1959-04-17
DER27107A DE1277874B (de) 1959-03-02 1960-01-14 Durchschreibeblaetter
DER0027325 1960-02-11

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US3186862A true US3186862A (en) 1965-06-01

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US (1) US3186862A (pt)
BE (1) BE577193A (pt)
CH (2) CH369152A (pt)
DE (3) DE1277874B (pt)
GB (1) GB906187A (pt)
NL (3) NL130026C (pt)

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US3446647A (en) * 1965-10-05 1969-05-27 Varco Inc Transfer coating and paper
US3471311A (en) * 1967-02-15 1969-10-07 Datacopy Ltd Transfer compositions

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GB1175065A (en) * 1966-09-12 1969-12-23 Kores Mfg Company Ltd Copy Sheet and Method of Making the Same

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GB550332A (en) * 1941-06-30 1943-01-04 Josef Groak Improvements in or relating to transfer copying materials
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AT143648B (de) * 1932-05-31 1935-11-25 Rinco A G Verfahren zur Herstellung von nicht durchschlagenden und nicht abschmierenden Durchschreibefarbbelägen auf Trägern, wie Durchschreibepapier, Durchschreibeformulare u. dgl.
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US627229A (en) * 1899-06-20 Manifqlding-sheet
US680637A (en) * 1899-05-17 1901-08-13 Horace P Brown Manifolding-sheet.
US1864097A (en) * 1927-10-06 1932-06-21 John Q Sherman Manifolding material
US1829250A (en) * 1930-06-23 1931-10-27 Protectu Corp Nonreadable carbon paper
US2279604A (en) * 1936-09-16 1942-04-14 Walti Rudolf Process for producing copying paper
GB550332A (en) * 1941-06-30 1943-01-04 Josef Groak Improvements in or relating to transfer copying materials
US2762715A (en) * 1949-03-30 1956-09-11 Columbia Ribbon Carbon Mfg Pressure sensitive hectograph transfer element
US2872340A (en) * 1954-02-18 1959-02-03 Columbia Ribbon Carbon Mfg Transfer element and method of making the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3446647A (en) * 1965-10-05 1969-05-27 Varco Inc Transfer coating and paper
US3471311A (en) * 1967-02-15 1969-10-07 Datacopy Ltd Transfer compositions

Also Published As

Publication number Publication date
NL237379A (pt)
NL130026C (pt)
GB906187A (en) 1962-09-19
BE577193A (pt)
CH370808A (de) 1963-07-31
CH369152A (de) 1963-05-15
DE1421434A1 (de) 1968-10-24
NL252592A (pt)
DE1277874B (de) 1968-09-19
DE1303214B (pt) 1971-10-07

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