US2032816A - Method of making safety paper - Google Patents

Method of making safety paper Download PDF

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Publication number
US2032816A
US2032816A US680451A US68045132A US2032816A US 2032816 A US2032816 A US 2032816A US 680451 A US680451 A US 680451A US 68045132 A US68045132 A US 68045132A US 2032816 A US2032816 A US 2032816A
Authority
US
United States
Prior art keywords
paper
ink
warning
printing
chemical
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
Application number
US680451A
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English (en)
Inventor
Burgess W Smith
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.)
TODD CO Inc
TODD COMPANY Inc
Original Assignee
TODD CO Inc
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
Application filed by TODD CO Inc filed Critical TODD CO Inc
Priority to US680451A priority Critical patent/US2032816A/en
Priority to GB35450/35A priority patent/GB457081A/en
Priority to FR800711D priority patent/FR800711A/fr
Priority to BE413042D priority patent/BE413042A/xx
Application granted granted Critical
Publication of US2032816A publication Critical patent/US2032816A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
    • D21H21/46—Elements suited for chemical verification or impeding chemical tampering, e.g. by use of eradicators
    • 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
    • Y10S428/916—Fraud or tamper detecting
    • 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.]
    • Y10T428/24835—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including developable image or soluble portion in coating or impregnation [e.g., safety paper, etc.]

Definitions

  • simenon' invention relates to methods oi making' safety paper for paper forms, instruments, and other documents requiring protection against fraudulent alteration, and, more particularly, to the variety or safety paper embodying means adapted to be rendered operative on the applicaA tion or" chemical eradicators, to Warn oi attempted alteration.
  • One object or" the invention is to provide a more simple and economical method of manufacturing such paper,
  • Another object is the provision of such a method capable of producing paper of white or uniformly tinted color, or having any desired pattern on it.
  • Another object is to provide a simple and inexpensive method of the character described, adapted for making paper containing an inherently warning word or other symbol, of an initially illegible character, but applied in a material which is reactive to chemical eradicating substances so as to develop a conspicuous color or stain upon the use of such substances in attempting alteration.
  • a further object is the provision of a method ci the character described in which the Warning symbol is appliedI to the lpaper in an initially illegible form but incorporated in the body of the paper itself, in a manner rendering it accessible to the eradicating substances, so as to secure conspicuous and permanent development oi the warning color or stairs,
  • Fig'. 1 illustrates, diagrammatically, one fom of equipment for practicing the invention.
  • Fig. 2 illustrates in a general way one form or" safety paper which may be produced by the invention.
  • My present invention provides a further simple and inexpensive method for producing such paper, having various other advantages such as increased initial illegibility of the warning sym bols, the penetration of the sensitive chemical or ink into the paper to resist removal by abrasive methods, as well as accessibility to the action of eradicating chemicals to insure rapid and thorough development or the warning color or stain, as well as being generally available for making safety paper of various kinds and styles.
  • IU represents a supply roll of the paper web l2 passing under a roll i3, immersed in water or its equivalent in a vat 25, from which the web iscarried through squeeze rolls I4 and I5 to remove the surplus liquid.
  • 'I'he web may then be passed directly to the printing rolls, hereafter described, but is preferably immersed a second time in the vat 25 under a roll I3 from which it proceeds through a second pair of squeeze rolls I1 and I8 which remove all but a trace of the liquid from its surface.
  • This inking mechanism may have the usual or any suitable arrangement in accordance with the known construction commonly employed in printing presses.
  • vI have used water without the admixture of any substances, or a siz ⁇ e adapted for the purpose, or I may use a colored bath of dye, or size containing the same, which will color the surface of the paper in a uniform tint where the rolls Il and I5, or I1 and Il, in case the latter are used, have plain or smooth surfaces. Should either pair of squeeze rolls be engraved with a pattern or design, such pattern or design will be impressed upon the paper in the manner described in Letters Patent to LaMonte and Saxe, No. 123,782.
  • Such steps provide an economical and continuous method of marking the paper with a plain tint or color design or pattern, respectively, after which the paper so marked may be passed to the printing devices to there receive an .invisible printing of the warning symbols in a suitable chemical or ink applied to the roll Il by means of the mechanism described above.
  • a suitable, substantially colorless sensitive chemical or ink for applying the warning symbols by means of the roll Il is fully described in my copending application Serial No. 512,196, filed January 29, 1931, namely, a materialcomprising dlphenol and diphenyl-guanidine or related substances as described in said co-pending application. Conditions may make it desirable to use glycerine or similar hydroscopic material to prevent the chemical or ink from drying on the inking and printing rolls, as well understood in the art.
  • I may also use such compounds as 1,3,5, aminomethvlchlorobenzothiazole, which may be in the form of the base, sulphate, hydrochloride or other salt dissolved or dispersed in a watermiscible medium, such as a solution of gum arabic in glycerine. It may also be ground into a varnish comprised of sulphonated oil, such as Turkey red oil.
  • a watermiscible medium such as a solution of gum arabic in glycerine.
  • sulphonated oil such as Turkey red oil.
  • Such inks are substantially colorless and stable until reaction with a chemical eradicator with which they develop a conspicuous color or'stain ofl a permanent nature dimcult to remove.
  • the paper web is preferably passed through drying rolls 26 and thence to a calender stack 21 and subsequently rewound in-a roll 2l.
  • a calender stack 21 instead of the calendering with rolls 21 some other form of nishing may be employed for removing any disturbance caused by printing of the homogeneous condition of -the paper surface.
  • the above method is far more economicalI than the application of the sensitive chemical or ink to the paper by-addition, for example, to the beater or to a bath in which the paper is submerged, since the sensitive chemical or ink is generally of a more or less expensive character, especially in a pure state and good quality and since, by the present method, it is substantially all applied directly to the paper at those portions only desired to be treated with it.
  • the final calendering or other finishing operation removes any disturbance of' the surface condition of the paper4 and affords a uniform and homogeneous appearance which completes the application of the warning symbols in a completely illegible manner.
  • vat 25 may include a coloring substance which is fugitive under the action of chemical eradicators or itself develops a warning color or stain in reaction therewith, as well understood in the art, and by providing one of the rolls I4, I5, or I1, Il with a desired design or pattern, the method may be advantageously employed to produce, instead of a uniformly white or tinted paper, a paper combining with the warning symbols a surface pattern adapted to protect against mechanical erasure orto ornament the paper.
  • colorlessv or substantially colorless I mean that the warning words on the paper when finished will not be readable, and if the strength of the printing is sumcient to be readily readable when activated by an ink eradicator, the intention of the terms is correct.
  • the method of producing safety Paper comprising wetting said paper with a solution of a dye, pressing said paper between a pair of rolls one of which has its surface formed with a pattern to mark the paper and remove the surplus solution, printing from aV separately inked surfaceawarningsymbolonthcsurfaceofsaidwet paper with a water-miscible ink other than said Image, which ink is initially illegible and contains a substantially colorless compound 'adapted to be darkened by the action of an ink emdicator, and dryingandnnishingthepapersurfacesothat said warning symbol is not readable.
  • the method of producing safety paper comprising moistening the paper with Water or a water solution, printing a warning symbol on the moistened paper with a printing surface separately inked with a water-miscible ink other than the substance with which said paper is moistened, which ink is initially illegible and contains a compound adapted to be discolored by the' action of the chemical eradicator, and drying and nishing the paper, so that said warning symbol is not readable.

Landscapes

  • Color Printing (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
US680451A 1932-08-25 1932-08-25 Method of making safety paper Expired - Lifetime US2032816A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US680451A US2032816A (en) 1932-08-25 1932-08-25 Method of making safety paper
GB35450/35A GB457081A (en) 1932-08-25 1935-12-21 Improvements in or relating to safety paper and methods of producing the same
FR800711D FR800711A (fr) 1932-08-25 1935-12-28 Perfectionnements aux papiers de sécurité et à leurs procédés de fabrication
BE413042D BE413042A (enrdf_load_stackoverflow) 1932-08-25 1935-12-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US680451A US2032816A (en) 1932-08-25 1932-08-25 Method of making safety paper

Publications (1)

Publication Number Publication Date
US2032816A true US2032816A (en) 1936-03-03

Family

ID=10377875

Family Applications (1)

Application Number Title Priority Date Filing Date
US680451A Expired - Lifetime US2032816A (en) 1932-08-25 1932-08-25 Method of making safety paper

Country Status (4)

Country Link
US (1) US2032816A (enrdf_load_stackoverflow)
BE (1) BE413042A (enrdf_load_stackoverflow)
FR (1) FR800711A (enrdf_load_stackoverflow)
GB (1) GB457081A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4846502A (en) * 1986-06-24 1989-07-11 Wallace Computer Services, Inc. Tamper evident document and use thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4846502A (en) * 1986-06-24 1989-07-11 Wallace Computer Services, Inc. Tamper evident document and use thereof

Also Published As

Publication number Publication date
BE413042A (enrdf_load_stackoverflow) 1936-01-31
FR800711A (fr) 1936-07-17
GB457081A (en) 1936-11-20

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