US3145117A - Process for production of pressure sensitive recording medium - Google Patents

Process for production of pressure sensitive recording medium Download PDF

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US3145117A
US3145117A US9744461A US3145117A US 3145117 A US3145117 A US 3145117A US 9744461 A US9744461 A US 9744461A US 3145117 A US3145117 A US 3145117A
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recording medium
supporting sheet
weight
organic binder
coating
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Katchaisky Aharon
Vofsi David
Gassner Saul Alexander
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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
    • B41M5/124—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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • 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
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • 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
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249962—Void-containing component has a continuous matrix of fibers only [e.g., porous paper, etc.]
    • Y10T428/249963—And a force disintegratable component [e.g., stencil sheet, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31895—Paper or wood
    • Y10T428/31899—Addition polymer of hydrocarbon[s] only
    • Y10T428/31902—Monoethylenically unsaturated

Definitions

  • a novel recording medium which comprises a supporting sheet coated with an opaque coating, having a color differing from that of the surface coated, and being so constituted that the impact of mechanical force renders the coating translucent in the impacted area.
  • the novel medium comprises a sheet provided with a coating of a color different from that of the surface coated, said coating being so constituted that the application of mechanical force, such as the impact of a typewriter key or stylus, results in a legible mark in the impacted area.
  • mechanical force such as the impact of a typewriter key or stylus
  • Such mechanical force may be applied by means of a pointed implement.
  • impact such as by means of a typewriter key, may be resorted to.
  • a recording medium comprises in combination a supporting sheet, such as paper, cardboard, plastic sheeting or the like, coated with an opaque layer of a polymeric substance as defined, having a foamed structure, admixed with a binder for enhancing its adhesion to the supporting sheet, said coating differing in color from the color of the surface coated and so constituted that the impact of mechanical force on said coating renders the coating translucent in the impacted area.
  • a supporting sheet such as paper, cardboard, plastic sheeting or the like
  • an opaque layer of a polymeric substance as defined having a foamed structure, admixed with a binder for enhancing its adhesion to the supporting sheet, said coating differing in color from the color of the surface coated and so constituted that the impact of mechanical force on said coating renders the coating translucent in the impacted area.
  • the polymeric substance to be used for producing the coating, according to the invention are preferably polyolefins. Best results were obtained with polyethylene having a molecular Weight in the range of between about 3000 and 150,000. According to a preferred embodiment of the invention there is used a supporting sheet having a colored surface, the color of which determines the color of the resulting script or marks. On the other hand a colored coating may be resorted to. Although different organic binders may be used, especially satisfactory results were obtained with natural or synthetic rubber or with polystyrene.
  • Recording media according to the invention may be used for different purposes.
  • the use in automatic recording instruments is self evident, so is the use of suitably coated thin colored paper for obtaining copies of type- Written script. taining copies of receipts and the like, written by a ball pen or the like.
  • the coating is prepared from a solution obtained by dissolving a polymeric substance, such as polyethylene, in a suitable solvent, such as aromatic hydrocarbons, aliphatic hydrocarbons or halogenated hydrocarbons, if necessary at elevated temperatures, to which there is added a suiiicient quantity of organic binder, such as natural or synthetic rubber, polystyrene or the like.
  • a polymeric substance such as polyethylene
  • a suitable solvent such as aromatic hydrocarbons, aliphatic hydrocarbons or halogenated hydrocarbons, if necessary at elevated temperatures
  • organic binder such as natural or synthetic rubber, polystyrene or the like.
  • the coating solution contains between about 1% and 10% by weight of the polymeric substance and from about 0.2% to 5% by weight of the organic binder.
  • FIGURE 2 A schematic representation of the process steps for the preparation of the present article is illustrated in FIGURE 2.
  • a sheet of paper having a blue glossy surface is coated on its colored side by means of a solution prepared as follows: 6 grams of polyethylene of molecular weight of about 6000 are introduced into 100 cc. of xylene, heated to a temperature of 65-70 C. and kept at this temperature until the polymer is dissolved. To the hot solution there are added about 10 cc. of 5% solution (by weight) of polystyrene in benzene.
  • the solution is applied (preferably while still hot) to the colored side or" the paper, so as to result in an even layer of about 1050 microns. Applications by means of brushing or spraying gave equally satisfactory results. After evaporation of the solvent the paper is ready for use.
  • the thus prepared recording medium gave a clearly legible script when used underneath the original in a typewriter.
  • the thus prepared recording medium gave a clearly legible script when used underneath the original written upon with a ball pen.
  • the thus prepared recording medium gave a clearly visible mark when used in an automatic recording instrument, and subjected to the application of pressure by means of a stylus.
  • the resultant coating had a red color, the script a blue one.
  • Example 3 White cardboard having a smooth surface, was coated with a coating as used in Example 2. The markings obtained were a different shade of red than the color of the coating, clearly visible to the eye.
  • Such coated paper may be used for ob- A sheet of paper having a black surface, is coated on the colored side by means of a solution prepared as follows:
  • a quantity of 3 grams of polypropylene (having a melt index of 1-9, determined by ASTM D1238-52T, and a specific gravity of 0.90-0.91, and commercially available as Moplen polypropylene resin from Montecatini Chemical Company) was dissolved in 100 ml. of boiling carbon tetrachloride. After dissolution of the polypropylene a quantity of 10 ml. of a 10% by weight solution of polyisobutylene in high boiling gasoline was added at a temperature of 70 C.
  • the coating of the paper with the solution was effected at an elevated temperature. After evaporation of the solvent the paper was ready for use.
  • the thus prepared recording medium gave a clearly visible script when used underneath the original in a typewriter. A number of satisfactory copies could thus be obtained.
  • the paper was stored for a number of months without deterioration.
  • a process for the production of a pressure sensitive recording medium of the auto-copy paper type which comprises (a) dissolving a material selected from the group consisting of polyethylene having a molecular weight in the range of from 3,000 to 150,000 and polypropylene having a melt index of 1-9 and a specific gravity of 0.90-0.91, in a solvent selected from the group consisting of aromatic hydrocarbons, aliphatic hydrocarbons and halogenated hydrocarbons;
  • a process for the production of a pressure sensitive recording medium which comprises (a) dissolving a material selected from the group consisting of polyethylene having a molecular weight in the range of from 3,000 to 150,000 and polypropylene having a melt index of 1-9 and a specific gravity of 0.90-0.91 in xylene;
  • a process for the production of a pressure sensitive recording medium which comprises (a) dissolving a material selected from the group consisting of polyethylene having a molecular weight in the range of from 3,000 to 150,000 and polypropylene having a melt index of 1-9 and a specific gravity of 0.90-0.91, at an elevated temperature in xylene;
  • a recording medium comprising a supporting sheet coated with an opaque pressure sensitive layer adapted to be rendered translucent in a predetermined area upon the impact of mechanical force in such area, said recording medium having been produced by the process as defined in claim 1.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Color Printing (AREA)
  • Laminated Bodies (AREA)
  • Duplication Or Marking (AREA)

Description

Aug. 18, 1964 PROCESS FOR A. KATCHALSKY ETAL 3,145,117 PRODUCTION OF PRESSURE SENSITIVE RECORDING MEDIUM Filed March 22. 1961 A/VO 4901/0452 POL YOLEF/IV 0/1170! VED //V J01 I/E/Vi' 47' EL 51 4750 TEN/[47 019! J 7' 065 ff/E IN VEN TOR.
United States Patent C) 3,145,117 PROCES FQR PRQDUCTTON F PRESdURE SENSl'lll E REUURDlNG MEDIUM Aharon Katchalsky, lid Dulrnov Sh, Tel Aviv, Israel;
David Vofsi, Meonot Voifson 4, Yad Weizmann, Rehnvotlr, Israel; and Saul Alexander Gassner, 17 Kolrhavi St., Shkhunat Ephraim, Rehovoth, lisrael Filed Mar. 22, 19611, Ser. No. 97,444- i 4- Clairns. (Cl. 1l7--36.7)
It is an object of the present invention to provide a novel recording medium.
It is a further object of the present invention to provide a method for the manufacture of such recording medium.
More particularly it is an object of the present invention to provide a novel recording medium which comprises a supporting sheet coated with an opaque coating, having a color differing from that of the surface coated, and being so constituted that the impact of mechanical force renders the coating translucent in the impacted area.
It is a further object of the present invention to provide such coating which has a foamed structure, which is opaque and which is rendered translucent in the impacted area.
It is a further object of the present invention to pro vide a convenient method for the manufacture of such recording medium.
Other objects will appear hereinafter.
Hitherto scientific instruments of the recording type have been used with different recording means for recording the data obtained, varying from recording said information in a legible script by means of an inked nib to rather complicated photographic and electrical methods.
The novel medium, according to the invention, comprises a sheet provided with a coating of a color different from that of the surface coated, said coating being so constituted that the application of mechanical force, such as the impact of a typewriter key or stylus, results in a legible mark in the impacted area. Such mechanical force may be applied by means of a pointed implement. On the other hand impact such as by means of a typewriter key, may be resorted to.
A recording medium according to the invention comprises in combination a supporting sheet, such as paper, cardboard, plastic sheeting or the like, coated with an opaque layer of a polymeric substance as defined, having a foamed structure, admixed with a binder for enhancing its adhesion to the supporting sheet, said coating differing in color from the color of the surface coated and so constituted that the impact of mechanical force on said coating renders the coating translucent in the impacted area. A schematic representation of the present novel recording medium is illustrated in FIGURE 1.
The polymeric substance to be used for producing the coating, according to the invention, are preferably polyolefins. Best results were obtained with polyethylene having a molecular Weight in the range of between about 3000 and 150,000. According to a preferred embodiment of the invention there is used a supporting sheet having a colored surface, the color of which determines the color of the resulting script or marks. On the other hand a colored coating may be resorted to. Although different organic binders may be used, especially satisfactory results were obtained with natural or synthetic rubber or with polystyrene.
Recording media according to the invention may be used for different purposes. The use in automatic recording instruments is self evident, so is the use of suitably coated thin colored paper for obtaining copies of type- Written script. taining copies of receipts and the like, written by a ball pen or the like.
It is clear that the thickness of the coating and its sensitivity have to be adapted to the intended use. It is clear that a more sensitive coating has to be used if the recording medium is to be used in a sensitive and delicate scientific recorder than if same has to be used for copies of typewritten script. It has been found that coatings, having a thickness of between 5 and microns, give satisfactory results.
The coating is prepared from a solution obtained by dissolving a polymeric substance, such as polyethylene, in a suitable solvent, such as aromatic hydrocarbons, aliphatic hydrocarbons or halogenated hydrocarbons, if necessary at elevated temperatures, to which there is added a suiiicient quantity of organic binder, such as natural or synthetic rubber, polystyrene or the like. This coating is applied to the supporting sheeting by any convenient means, such as brushing, coating or spraying, to result in an even layer of desired thickness. The coating solution contains between about 1% and 10% by weight of the polymeric substance and from about 0.2% to 5% by weight of the organic binder. Although the concentration of the polymeric substance and binder in the solvent has to be adjusted to the intended mode of application, it has been found that generally a 1 to 5% solution of the polymeric substance (by weight) gave satisfactory results. A schematic representation of the process steps for the preparation of the present article is illustrated in FIGURE 2.
The invention is illustrated but not restricted by the following examples:
A sheet of paper having a blue glossy surface is coated on its colored side by means of a solution prepared as follows: 6 grams of polyethylene of molecular weight of about 6000 are introduced into 100 cc. of xylene, heated to a temperature of 65-70 C. and kept at this temperature until the polymer is dissolved. To the hot solution there are added about 10 cc. of 5% solution (by weight) of polystyrene in benzene.
The solution is applied (preferably while still hot) to the colored side or" the paper, so as to result in an even layer of about 1050 microns. Applications by means of brushing or spraying gave equally satisfactory results. After evaporation of the solvent the paper is ready for use.
The thus prepared recording medium gave a clearly legible script when used underneath the original in a typewriter.
The thus prepared recording medium gave a clearly legible script when used underneath the original written upon with a ball pen.
The thus prepared recording medium gave a clearly visible mark when used in an automatic recording instrument, and subjected to the application of pressure by means of a stylus.
Example 2 Paper identical with the one used in Example 1, was coated by brushing with a coating as used in Example 1, to which there was added 0.1% by Weight of an aniline dye of red color, soluble in xylene. The resultant coating had a red color, the script a blue one.
Example 3 White cardboard having a smooth surface, was coated with a coating as used in Example 2. The markings obtained were a different shade of red than the color of the coating, clearly visible to the eye.
Such coated paper may be used for ob- A sheet of paper having a black surface, is coated on the colored side by means of a solution prepared as follows:
A quantity of 3 grams of polypropylene (having a melt index of 1-9, determined by ASTM D1238-52T, and a specific gravity of 0.90-0.91, and commercially available as Moplen polypropylene resin from Montecatini Chemical Company) was dissolved in 100 ml. of boiling carbon tetrachloride. After dissolution of the polypropylene a quantity of 10 ml. of a 10% by weight solution of polyisobutylene in high boiling gasoline was added at a temperature of 70 C.
The coating of the paper with the solution was effected at an elevated temperature. After evaporation of the solvent the paper was ready for use.
The thus prepared recording medium gave a clearly visible script when used underneath the original in a typewriter. A number of satisfactory copies could thus be obtained.
The paper was stored for a number of months without deterioration.
Although we have described our invention with a certain degree of particularity, it is understood that the present disclosure has been made by way of example only and that numerous changes in the details of the formulations may be resorted to, without departing from the spirit and the scope of the invention, as claimed hereinafter.
We claim:
1. A process for the production of a pressure sensitive recording medium of the auto-copy paper type, which comprises (a) dissolving a material selected from the group consisting of polyethylene having a molecular weight in the range of from 3,000 to 150,000 and polypropylene having a melt index of 1-9 and a specific gravity of 0.90-0.91, in a solvent selected from the group consisting of aromatic hydrocarbons, aliphatic hydrocarbons and halogenated hydrocarbons;
(b) adding an organic binder selected from the group consisting of natural rubber, synthetic rubber and polystyrene thereto, the resulting solution containing from 1% to 10% by weight of said material and from 0.2% to 5% by weight of said organic binder;
(c) applying said solution at an elevated temperature to a supporting sheet; and
(d) permitting said solvent to evaporate to produce an opaque layer adhered to the supporting sheet by said organic binder, said layer having a thickness of from 5 to 100 microns, and possessing a color distinct from that of said supporting sheet.
2. A process for the production of a pressure sensitive recording medium, which comprises (a) dissolving a material selected from the group consisting of polyethylene having a molecular weight in the range of from 3,000 to 150,000 and polypropylene having a melt index of 1-9 and a specific gravity of 0.90-0.91 in xylene;
(b) adding a solution of an organic binder selected from the group consisting of natural rubber, synthetic rubber and polystyrene thereto, the resulting solution containing from 1% to 10% by Weight of said material and from 0.2% to 5% by weight of said organic binder;
(c) applying said solution at an elevated temperature to a supporting sheet; and
(d) permitting the xylene to evaporate to produce an opaque layer adhered to the supporting sheet by said organic binder, said layer having a thickness of from 5 to microns and possessing a color distinct from that of said supporting sheet.
3. A process for the production of a pressure sensitive recording medium which comprises (a) dissolving a material selected from the group consisting of polyethylene having a molecular weight in the range of from 3,000 to 150,000 and polypropylene having a melt index of 1-9 and a specific gravity of 0.90-0.91, at an elevated temperature in xylene;
(b) dissolving polystyrene in benzene and adding the resulting solution to the solution of said material in xylene, the combined mixture containing from 1% to 10% by weight of said material and from 0.2% to 5% by weight of polystyrene;
(c) applying said mixture at an elevated temperature to a supporting sheet; and
(d) permitting the benzene and xylene to evaporate to produce an opaque layer adhered to the supporting sheet by said polystyrene, said layer having a thickness of from 5 to 100 microns and possessing a color distinct from that of the supporting sheet.
4. A recording medium comprising a supporting sheet coated with an opaque pressure sensitive layer adapted to be rendered translucent in a predetermined area upon the impact of mechanical force in such area, said recording medium having been produced by the process as defined in claim 1.
References Cited in the file of this patent UNITED STATES PATENTS OTHER REFERENCES Hahn: I. and E. Chem., vol. 37, No. 6, pp. 526-533, June 1945, 117-161 VHH.
Polyethylene, Renfrew and Morgan, Iliffe and Sons, London, pages 397 and 398. (Copy in Group 160.)

Claims (1)

1. A PROCESS FOR THE PRODUCTION OF A PRESSURE SENSITIVE RECORDING MEDIUM OF THE AUTO-COPY PAPER TYPE, WHICH COMPRISES (A) DISSOLVING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYETHYLENE HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM 3,000 TO 150,000 AND POLYPROPYLENE HAVING A MELT INDEX OF 1-9 AND A SPECIFIC GRAVITY OF 0.90-0.91, IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF AROMATIC HYDROCARBONS, ALIPHATIC HYDROCARBONS AND HALOGENATED HYDROCARBONS; (B) ADDING AN ORGANIC BINDER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, SYNTHETIC RUBBER AND POLYSTYRENE THERETO, THE RESULTING SOLUTION CONTAINING FROM 1% TO 10% BY WEIGHT OF SAID MATERIAL AND FROM 0.2% TO 5% BY WEIGHT OF SAID ORGANIC BINDER; (C) APPLYING SAID SOLUTION AT AN ELEVATED TEMPERATURE TO A SUPPORTING SHEET; AND (D) PERMITTING SAID SOLVENT TO EVAPORATE TO PRODUCE AN OPAQUE LAYER ADHERED TO THE SUPPORTING SHEET BY SAID ORGANIC BINDER, SAID LAYER HAVING A THICKNESS OF FROM 5 TO 100 MICRONS, AND POSSESSING A COLOR DISTINCT FROM THAT OF SAID SUPPORTING SHEET.
US9744461 1959-11-08 1961-03-22 Process for production of pressure sensitive recording medium Expired - Lifetime US3145117A (en)

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CH (1) CH400755A (en)
DE (1) DE1178866B (en)
DK (1) DK100282C (en)
FR (1) FR1273165A (en)
GB (1) GB933961A (en)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513010A (en) * 1966-07-11 1970-05-19 Kalvar Corp Conversion foil
US3620806A (en) * 1968-05-17 1971-11-16 Westvaco Corp Blushed polystyrene coating on paper

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021214710A1 (en) * 2021-12-20 2023-06-22 Benecke-Kaliko Aktiengesellschaft Self-healing polyolefin multilayer construct with easy optional layer exchange and optional design applications as well as sequential layer removal to ensure clinically clean surfaces

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519660A (en) * 1947-09-06 1950-08-22 Little Inc A Recording material
US2665262A (en) * 1950-08-04 1954-01-05 Interchem Corp Coating compositions for recording media
US2710263A (en) * 1951-02-02 1955-06-07 Minnesota Mining & Mfg Heat-sensitive copying-paper
US2739909A (en) * 1950-06-29 1956-03-27 Nashua Corp Coated paper suitable for stylus inscription and method of making the same
US2848752A (en) * 1954-12-03 1958-08-26 Du Pont Process for the production of porous open-cell structure polymer films
US2927039A (en) * 1957-03-07 1960-03-01 Labelon Tape Co Inc Heat sensitive copying sheet
US2939802A (en) * 1957-11-13 1960-06-07 Uarco Inc Pressure sensitive recording material and method of making same
US2955958A (en) * 1956-03-05 1960-10-11 Nathan J Brown Process of treating woven textile fabric with a vinyl chloride polymer
US2962382A (en) * 1958-02-25 1960-11-29 Ludlow Corp Sheet recording material and method of making same
US2971858A (en) * 1956-06-13 1961-02-14 Montedison Spa Synthetic paper and process for producing same
US3020172A (en) * 1958-09-16 1962-02-06 Permaco S A Process of manufacture of temperaturesensitive recording paper

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519660A (en) * 1947-09-06 1950-08-22 Little Inc A Recording material
US2739909A (en) * 1950-06-29 1956-03-27 Nashua Corp Coated paper suitable for stylus inscription and method of making the same
US2665262A (en) * 1950-08-04 1954-01-05 Interchem Corp Coating compositions for recording media
US2710263A (en) * 1951-02-02 1955-06-07 Minnesota Mining & Mfg Heat-sensitive copying-paper
US2848752A (en) * 1954-12-03 1958-08-26 Du Pont Process for the production of porous open-cell structure polymer films
US2957791A (en) * 1954-12-03 1960-10-25 Du Pont Opaque porous pressure-clarifiable films of addition polymers
US2955958A (en) * 1956-03-05 1960-10-11 Nathan J Brown Process of treating woven textile fabric with a vinyl chloride polymer
US2971858A (en) * 1956-06-13 1961-02-14 Montedison Spa Synthetic paper and process for producing same
US2927039A (en) * 1957-03-07 1960-03-01 Labelon Tape Co Inc Heat sensitive copying sheet
US2939802A (en) * 1957-11-13 1960-06-07 Uarco Inc Pressure sensitive recording material and method of making same
US2962382A (en) * 1958-02-25 1960-11-29 Ludlow Corp Sheet recording material and method of making same
US3020172A (en) * 1958-09-16 1962-02-06 Permaco S A Process of manufacture of temperaturesensitive recording paper

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513010A (en) * 1966-07-11 1970-05-19 Kalvar Corp Conversion foil
US3620806A (en) * 1968-05-17 1971-11-16 Westvaco Corp Blushed polystyrene coating on paper

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GB933961A (en) 1963-08-14
DE1178866B (en) 1964-10-01
LU39375A1 (en) 1961-01-07
AT233604B (en) 1964-05-25
CH400755A (en) 1965-10-15
FR1273165A (en) 1961-10-06
DK100282C (en) 1964-11-09

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