US3243312A - Direct-transfer copy sheet - Google Patents

Direct-transfer copy sheet Download PDF

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Publication number
US3243312A
US3243312A US22923562A US3243312A US 3243312 A US3243312 A US 3243312A US 22923562 A US22923562 A US 22923562A US 3243312 A US3243312 A US 3243312A
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US
United States
Prior art keywords
color
layer
wax
transfer
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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English (en)
Inventor
Schutzner Walter
Mock Franz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
W Koreska GmbH
Original Assignee
W Koreska GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AT80962A external-priority patent/AT246753B/de
Priority claimed from AT85062A external-priority patent/AT246181B/de
Application filed by W Koreska GmbH filed Critical W Koreska GmbH
Application granted granted Critical
Publication of US3243312A publication Critical patent/US3243312A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L1/00—Devices for performing operations in connection with manifolding by means of pressure-sensitive layers or intermediaries, e.g. carbons; Accessories for manifolding purposes
    • B41L1/20—Manifolding assemblies, e.g. book-like assemblies
    • B41L1/36—Manifolding assemblies, e.g. book-like assemblies with pressure-sensitive layers or coating other than carbon
    • 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
    • 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
    • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
    • B41M5/132—Chemical colour-forming components; Additives or binders therefor
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31801—Of wax or waxy material
    • Y10T428/31804—Next to cellulosic
    • 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]
    • Y10T428/31801—Of wax or waxy material
    • Y10T428/31804—Next to cellulosic
    • Y10T428/31808—Cellulosic is paper

Definitions

  • the present invention relates to direct-transfer copying material and, more particularly, to copying paper whereby single or multiple copies may be made without interposition of separate sheets of color-transfer paper between the original and the copy sheets.
  • a direct-transfer copying sheet whose rear side is formed with a color-transfer layer wherein the coloring material is held so tightly that transfer to ordinary (i.e. non-wax-coated) sheets is avoided but which readily gives up such coloring material to a coloracceptor layer carried upon the upper surface of an underlying copy-receiving sheet.
  • the color-acceptor layer generally comprises a wax or waxy material to which the coloring agent can be transferred to produce a sharp copy which is of a color contrasting with that of the copyreceiving sheet and which is smudge-resistant.
  • color-acceptor layer of the color-receiving sheet compatible with ink (e.g. printing inks, fountain-pen inks and ballpoint-pen inks) so that ordinary writing is possible upon the upper surface of these sheets.
  • ink e.g. printing inks, fountain-pen inks and ballpoint-pen inks
  • the colortransfer layer be nonsoiling to the hands and capable of producing sharply defined, high-contrast copy and, to this end, the colortransfer layer according to the invention may be provided with a binder consisting of one or more synthetic resins and one or more waxes or wax-like substances.
  • the present invention derives from the discovery that the color-transfer layer is bonded more securely and is more capable of producing clear copy when the coloring agent is bound by a synthetic resin containing significant quantities of wax or wax-like substances.
  • a color-transfer layer wherein the coloring agent is bonded by a synthetic resin has been found to be too hard for the purposes described since it does not permit transfer of the color even to prepared underlying sheets.
  • the wax or wax-like substances which hereinafter are generally referred to as a wax but should be considered to include one or more waxes and waxlike substances or mixtures thereof, one obtains ready transfer of the coloring agent to wax-treated underlying surfaces and sharply defined images.
  • Synthetic resins of this type include polystyrenes and polyvinyl compounds (e.g. polyvinyl acetates) while the wax may be a stearin or montan wax compounded therewith.
  • the colortransfer layer is provided with a binder (eg. a cellulosic derivative such as ethylcellulose) to which the coloring agent is added.
  • a binder eg. a cellulosic derivative such as ethylcellulose
  • the binder and the admixed coloring agent are then combined with a mixture of a solvent for the synthetic resin and a liquid medium, advantageously compatible with the solvent, in which the synthetic resin is insoluble.
  • the solvent for the cellulosic derivative is, according to the invention, substantially more volatile than the liquid medium (i.e. has a lower boiling point).
  • a mixture is, for example, a blend of acetone and water wherein the alcetone acts as a volatile solvent for, say, ethylcellulose while the water serves 'as the higherboiling liquid medium.
  • the color layer Upon deposition of the color mass on the paper strip from the solvent and liquid deposition medium therefor, the color layer is dried. Since the solvent for the cellulosic derivative is more volatile than the liquid vehicle, it evaporates earlier so that, upon drying, an increase in the concentration of the liquid vehicle results. This effects an at least partial precipitation of the synthetic resin and results in a substantially white deposition which constitutes the color layer. This white appearance or blush coat is believed to be a consequence of the fineness of the precipitated particles constituting the color layer. It is also possible to acco plish the same effect without the addition of a liquid medium to the original mixture if such liquid medium is provided from the drying environment.
  • the air when necessary, has added thereto, in the form of steam, the necessary water content.
  • the color-transfer layer is transferred, upon the application of writing pressure, to the copy-receiving sheet and produces copy as direct as that resulting from earlier techniques.
  • the basis for this surprising effect is found in the fact that the cellulosic derivative is in the form of small finely divided particles in a somewhat dispersed state which, upon application of writing pressure, are densified and transferred to the copy-receiving sheet in the form of large transparent particles in which the dark color of the coloring agent stands out clearly.
  • other synthetic resins such as chlorinated polyvinyl chlorides can 'be deposited in the manner set forth.
  • trichloroethylene and gasoline may serve as the solvent and liquid vehicle previously described.
  • the resulting copying material has a color-transfer layer which is sufliciently hard that undesired transfer of color does not take place and paper and hands are unsoiled while color transfer to prepared surfaces results in clear sharply defined copy.
  • Another feature of the present invention resides in the fact that the pigment proportion of the color transfer layer can be raised above that characterizing earlier copying materials. Nevertheless, a clean-looking colortransfer layer results.
  • Such means may take the form of non-coloring pigments or fillers which have an appearance contrasting with that of the eolor-transfer pigment but do not impart any color to the copy-receiving sheets.
  • black pigments are employed, whitecolored additives may be provided which either strongly or weakly mask the color-transfer pigment.
  • strongly masking pigments are titanium dioxide and zinc oxide while kaolin or chalk may serve for weakly masking the color-transfer pigment.
  • the quantity of the different pigments is so chosen that the (total quantity of coloring pigment and contrasting pigment provides the optimal number of seed particles for the most effective precipitation of the cellulosic derivative.
  • sufficient color pigment is provided to yield clean copies with high color intensity and to this is added a lesser quantity of a weak masking pigment (e.g. kaolin) to provide the required number of seed particles.
  • a weak masking pigment e.g. kaolin
  • Another possibility resides in an admixture of the color pigment and a strong masking pigment (e.g. titanium white) in which case the quantity of color pigment is somewhat higher than in the ab-ove mentioned case, since the masking pigment does, to a limited extent, reduce the effectiveness of the color pigment.
  • a strong masking pigment e.g. titanium white
  • the upper surface of the copying sheet is, according to prior-art techniques, provided with a fine coating of wax, stearin, parafiin or the like.
  • Earlier-known copying materials had, however, the disadvantage that ordinary writing (e.g. with ballpoint or fountain pens) upon them was impossible and printing inks were likewise incompatible with this layer.
  • ordinary writing e.g. with ballpoint or fountain pens
  • metal soaps are added to the wax layer, which serve as drying agents, they facilitate printing upon such copy papers. It has also been found that metal soaps likewise serve to facilitate the writing upon the sheets with the aid of ballpoint pens.
  • the wax layer with means for increasing the adhesion forces between such inks and the wax-treated surface.
  • the surface-active agents found suitable for this purpose are the water-soluble metal soaps (cg. sodium stearates), alkyl-aryl sulfonates, fatty-alcohol sulfonates and nonionic surfactants such as polyglycols, their ethers and their esters.
  • water-soluble metal soaps cg. sodium stearates
  • alkyl-aryl sulfonates e.g. sodium stearates
  • fatty-alcohol sulfonates e.g. fatty-alcohol sulfonates
  • nonionic surfactants such as polyglycols, their ethers and their esters.
  • FIG. 1 is a cross-sectional view of a sheet of copy paper according to the invention disproptionately enlarged to illustrate the coatings thereon;
  • FIG. 2 is a diagrammatic view showing apparatus for applying the coatings.
  • FIG. 1 a first sheet of direct-transfer copy paper 10 comprising a substrate 11 of paper or other flexible material which is coated on its lower surface with a pigmentary layer 12 consisting of a binder and pigment particles 13 which are dispersed in the binder.
  • a coating 14 of a release agent On the upper surface of the substrate 11 there is provided a coating 14 of a release agent.
  • the waxy color-accepting agent 24 of a sheet 20 disposed below sheet 10 is compatible with and readily receives the pigmented material of coating 12 carried on the underside of sheet 10.
  • Application of pressure e.g. by a typewriter or manual writing implement
  • to the upper surface of sheet 10 will result in a transfer of pigmentary matter from coating 1:2 to the upper surface of sheet 20.
  • the pigmentedmaterial adheres readily to this wax-coated surface and reproduces the impression made upon sheet Sheet is provided with a pigmentary layer 22 for transferring this impression to still another wax-coated sheet.
  • a pigmentary layer 22 for transferring this impression to still another wax-coated sheet.
  • the paper or other flexible substrate 31 may be unwound from a supply roll and passed through.
  • a first station wherein the pigmentary coating is applied via a spray nozzle 32 and a doctor blade 33.
  • a blower 34 forwardly of this blade dries the layer whereupon the substrate passes to a further coating station wherein its opposite surface is provided with a layer of a release agent.
  • the molten colorreceiving agent is cast from the melt by a coating device 35 and distributed by a doctor blade 36 disposed rearwardly of a blower 37 which solidifies this layer.
  • the paper then may be severed into sheets by a reciprocating blade 38 in the usual manner.
  • Example I A mixture consisting by weight of 4% polystyrene, 5% stearin, 10% carbon-black color-transfer pigment and 81% trichloroethylene solvent is deposited upon a fiat flexible substrate (e.g. paper) and dried to produce a deposit of about 56 grams/m.
  • the sheet is also provided, on its upper surface, with a wax layer (5 grams/m?) of ozocerite which is deposited thereon from a melt and has a softening point of about 75 C.
  • the resulting color-transfer layer readily deposits its color pigment upon the upper surface of an underlying sheet and produces sharp, smudge-free copy.
  • waxes or wax-like substances are also suitable for incorporation alone or in admixture with one of the others in the color-transfer layer: cetyl alcohol, crude montan waxes, carnauba wax, KP wax of the type produced -by the firm Farbwerke Hochst, candelilla wax and the like.
  • cetyl alcohol crude montan waxes
  • carnauba wax KP wax of the type produced -by the firm Farbwerke Hochst
  • candelilla wax and the like.
  • the wax may be heated to a temperature of, say, 6070 C. to accomplish such solutions.
  • Example II The rear surface of a paper substrate is treated with a mixture consisting by weight of substantially 6% polyvinyl acetate of the type manufactured under the name Mowilith by the firm Farb-we-rke Hochst, 10% crude montan wax, 15% graphite pigment and 69% toluene, the layer being then dried to a thickness of about 5-6 grams/ m.
  • the montan Wax is only silghtly soluble in the toluene solvent at room temperature
  • the mixture is heated to a temperature of about 70 C. in order to facilitate its dissolution.
  • the front side of the sheet is provided, as before, with a ceresin-wax laye.
  • Example III A color-transfer layer of relatively clear appearance but having the copying capabilities of those of Examples I and II is provided by admixing 5%, by weight, ethylcellulose (e.g. that marketed by Hercules Powder Company as N-lOO) with 15% pulverulent graphite pigment and acetone solvent for the ethylcellulose in an amount constituting 67% of the mixture. To this is added 13% water which serves as a liquid vehicle for the ethylcellulose. The mixture is deposited upon the rear surface of a paper sheet and dried to produce a layer of about 56 grams/m.
  • ethylcellulose e.g. that marketed by Hercules Powder Company as N-lOO
  • water which serves as a liquid vehicle for the ethylcellulose
  • Chlorinated polyvinyl chloride may be substituted for the ethylcellulose if trichloroethylene and gasoline are substituted for the acetone and water.
  • Example IV 5 parts by weight of ethylcellulose are admixed with 15 parts of a graphite color pigment and 10 parts by weight of a pulverulent kaolin covering or masking pigment. To the admixture are added 60 parts by weight of acetone and 10 parts water to produce a mixture which may be deposited upon a sheet asdescribed in Example III.
  • the kaolin substantially lightens the color of the color-transfer layer without detrimentally effecting the copying capabilities of the sheet.
  • Example V In a manner similar to that of Example IV, a colortransfer layer is produced from a mixture of 5 parts by weight ethylcellulose, 20 parts by weight graphite, 5 parts by weight of titanium-white masking pigment, 60 parts by weight acetone and 10 parts by weight of water.
  • Example VI A similar color-transfer layer is formed from 5 parts ethylcellulose, 15 parts graphite, 3 parts finely divided sillcic acid (e.g. that manufactured under the name Aerosil by the firm Degussa), 60 parts acetone and 10 parts Water, all parts by weight.
  • Example VII A color-transfer layer for red copies is provided by compounding 5 parts by weight ethylcellulose with 5 parts litholred pigment (e.g. of the highly comminuted type produced by BASF under the trademark RMT), 10 parts kaolin, 60 parts acetone, 10 parts water and depositing same upon a sheet to yield a layer of about 5-6 grams/mi
  • Another suitable color-transfer layer is formed by drying a layer composed, in parts by weight, of 5 parts chlorinated polyvinyl chloride, 15 parts graphite, 5 parts Spanish white (carbonate of lime), 5 parts kaolin, 60 parts methylene chloride and 10 parts benzine having a boiling-point range of 120 C.
  • Example X The upper surfaces of any of the sheets described in accordance with Examples IIX may be provided with a Wax layer consisting, substantially, of 30 parts by weight of zinc stearate, 67 parts by weight of paraffin and 3 parts by weight of Aerosil.
  • the stearate and paraffin are melted together and deposited from the melt onto a support paper after the Aerosil is added.
  • the resulting layer of about 3 grams/m. can be written upon by ball point pens and is a color acceptor yielding unobjectionable copy.
  • Example XI Another wax layer may be provided by melting 70 parts by weight of ozocerite (ceresin wax) together with 30 parts by weight of lead stearate and then coating a substrate with this melt to yield a layer of 3 grams/mi A paper thus treated can be printed in the usual manner with printing inks drying at normal rates.
  • ozocerite Ceresin wax
  • Example XII A Wax surface compatible with writing inks may be provided by depositing from the melt a mixture of 65 parts by weight of parafiin and 35 parts by Weight of a mon-oethanolamide of stearic acid to yield a layer of 3 grams/m
  • Example XIII A melt consisting of 34 parts by weight of ozocerite, 33 parts by Weight lead stearate and 33 parts by weight of the monoethanolamide of stearic acid is deposited upon a sheet as previously described.
  • the resulting paper can be printed in a conventional process with the inks drying at normal speed and can be written upon with both ballpoint and fountain-pen inks.
  • Direct-transfer copy material comprising a plurality of superimposed sheets, each having an upper and a lower surface; a layer of color-acceptor agent having a major proportion of wax and including a metal soap in suflicient quantity to facilitate drying of ink deposited upon said layer of color-acceptor agent; and a color-transfer layer on the lower surface of said substrate adapted to preferentially impart color to a layer of color-acceptor agent on the upper surface of an identical underlying sheet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Color Printing (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
US22923562 1961-10-11 1962-10-08 Direct-transfer copy sheet Expired - Lifetime US3243312A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AT762461 1961-10-11
AT769361 1961-10-12
AT80962A AT246753B (de) 1962-01-31 1962-01-31 Durchschreibematerial
AT85062A AT246181B (de) 1962-02-01 1962-02-01 Durchschreibematerial

Publications (1)

Publication Number Publication Date
US3243312A true US3243312A (en) 1966-03-29

Family

ID=27421360

Family Applications (2)

Application Number Title Priority Date Filing Date
US22923562 Expired - Lifetime US3243312A (en) 1961-10-11 1962-10-08 Direct-transfer copy sheet
US64526567 Expired - Lifetime US3416942A (en) 1961-10-11 1967-06-12 Direct-transfer copy sheet

Family Applications After (1)

Application Number Title Priority Date Filing Date
US64526567 Expired - Lifetime US3416942A (en) 1961-10-11 1967-06-12 Direct-transfer copy sheet

Country Status (10)

Country Link
US (2) US3243312A (xx)
BE (1) BE623492A (xx)
BR (1) BR6243740D0 (xx)
CH (2) CH392572A (xx)
DE (1) DE1421467A1 (xx)
DK (2) DK113589B (xx)
FI (1) FI41832B (xx)
GB (1) GB1002723A (xx)
NL (5) NL139484B (xx)
NO (1) NO118851B (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410712A (en) * 1965-10-19 1968-11-12 Renker Belipa Gmbh Pressure responsive transfer system and process of making
US3411935A (en) * 1965-10-22 1968-11-19 Renker Belipa Gmbh Pressure-sensitive transfer elements and method of producing same
US3416942A (en) * 1961-10-11 1968-12-17 Koreska Gmbh W Direct-transfer copy sheet
US3635747A (en) * 1969-07-11 1972-01-18 Standard Register Co Donor-receptor copy paper
US4851384A (en) * 1985-05-02 1989-07-25 The Wiggins Teape Group Limited Record material
US20110163252A1 (en) * 2008-07-14 2011-07-07 Sallen Rosello Cesar Composition protective against fire and use

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855166A (en) * 1973-10-26 1974-12-17 Canon Kk Binder resins for electron photography and the like and method of productive thereof
US3953659A (en) * 1974-07-15 1976-04-27 Texas Instruments Incorporated Thermal paper coating
FR2457774A1 (fr) * 1979-05-31 1980-12-26 Papyrus Sa Composition homogene formant autocopiant chimique de tres grande stabilite et papier autocopiant en comportant application

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US627229A (en) * 1899-06-20 Manifqlding-sheet
US680637A (en) * 1899-05-17 1901-08-13 Horace P Brown Manifolding-sheet.
US1845568A (en) * 1928-04-27 1932-02-16 Ervin E Strawn Copying agency
GB501983A (en) * 1936-09-16 1939-03-09 Heinrich Rinderknecht Process for the manufacture of copying paper
US2872340A (en) * 1954-02-18 1959-02-03 Columbia Ribbon Carbon Mfg Transfer element and method of making the same
US3111421A (en) * 1961-04-27 1963-11-19 Columbia Ribbon & Carbon Method for preparing pressure-sensitive duplicating elements

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029157A (en) * 1958-11-18 1962-04-10 Audio Devices Inc Magnetizable image transfer medium
US3151550A (en) * 1961-03-27 1964-10-06 Columbia Ribbon & Carbon Duplication
BE623492A (xx) * 1961-10-11 1900-01-01

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US627229A (en) * 1899-06-20 Manifqlding-sheet
US680637A (en) * 1899-05-17 1901-08-13 Horace P Brown Manifolding-sheet.
US1845568A (en) * 1928-04-27 1932-02-16 Ervin E Strawn Copying agency
GB501983A (en) * 1936-09-16 1939-03-09 Heinrich Rinderknecht Process for the manufacture of copying paper
US2872340A (en) * 1954-02-18 1959-02-03 Columbia Ribbon Carbon Mfg Transfer element and method of making the same
US3111421A (en) * 1961-04-27 1963-11-19 Columbia Ribbon & Carbon Method for preparing pressure-sensitive duplicating elements

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416942A (en) * 1961-10-11 1968-12-17 Koreska Gmbh W Direct-transfer copy sheet
US3410712A (en) * 1965-10-19 1968-11-12 Renker Belipa Gmbh Pressure responsive transfer system and process of making
US3411935A (en) * 1965-10-22 1968-11-19 Renker Belipa Gmbh Pressure-sensitive transfer elements and method of producing same
US3635747A (en) * 1969-07-11 1972-01-18 Standard Register Co Donor-receptor copy paper
US4851384A (en) * 1985-05-02 1989-07-25 The Wiggins Teape Group Limited Record material
US20110163252A1 (en) * 2008-07-14 2011-07-07 Sallen Rosello Cesar Composition protective against fire and use
US8246866B2 (en) * 2008-07-14 2012-08-21 Ingenieria Y Control Del Fuego, S.L. Composition protective against fire and use

Also Published As

Publication number Publication date
CH390960A (de) 1965-04-30
CH392572A (de) 1965-05-31
DK113589B (da) 1969-04-08
BE623492A (xx) 1900-01-01
GB1002723A (en) 1965-08-25
BR6243740D0 (pt) 1973-12-27
DK119361B (da) 1970-12-21
FI41832B (xx) 1969-12-01
DE1421467A1 (de) 1968-10-31
US3416942A (en) 1968-12-17
NL284249A (xx) 1900-01-01
NO118851B (xx) 1970-02-23
NL139484B (nl) 1973-08-15
NL7312011A (xx) 1973-11-26
NL7312010A (xx) 1973-11-26
NL7312009A (xx) 1973-11-26

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