US1334843A - Process of manufacturing parchment-paper - Google Patents

Process of manufacturing parchment-paper Download PDF

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Publication number
US1334843A
US1334843A US275006A US27500619A US1334843A US 1334843 A US1334843 A US 1334843A US 275006 A US275006 A US 275006A US 27500619 A US27500619 A US 27500619A US 1334843 A US1334843 A US 1334843A
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United States
Prior art keywords
paper
acid
bath
parchment
manufacturing
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Expired - Lifetime
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US275006A
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Dagnall Walter
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Individual
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Individual
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Publication of US1334843A publication Critical patent/US1334843A/en
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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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/65—Acid compounds

Definitions

  • sulfurous acid of different strength viz. the first bath with sulfuric acid and Water 1 of a specific gravity of 1.700 to 1.800 to which is added sulfurous acid to reduce it until it registers 1.750 and the secondbath, of which the sulfuric acid is of the same strength but the sulfurous acid is admixed in greater quantity to reduce it to a specific gravityvarying from 1.200 to 1.400, all solutions losing at aloout 60% F., the strength of the acid varying according to the quality and texture of the paper I wish to impregnate or parchmentize, i. e. the thicker the paper, the greater the strength of acid required.
  • the paper is Washed and afterward passed throughan alkali bath and again washed and softened in any lrnown manner either by glycerin, calcium chlorid, salt, or thelike.
  • the paper or parchment ma be loaded with any suitable materia or mineral earth.
  • the paper In carrying my invention into'practice the paper is first run or passed from the reel into the first acid bath which is kept cool. It is then squeezed and the surplus acid returned to the first bath, it is then passed under rollers to the second bath (which is likewise kept cool,) squeezed between rollers, and the surplus acid returned to the second bath, care being taken that the specific gravity of the acid in these baths in in conformity with the limits aboveetated. It is essential that the acid baths do not rise above 60% F. since this would deteriorate the paper. The paper is then passed between water sprays and well washed to remove the acid, is then passed between rollers and squeezed, and then passed through an alkali bath to remove IIBSSBS.
  • the paper is then passed between rollers and squeezed .and again passed through water sprays and then between rollers and squeezed and then, if required, through the softening bath of glycerin, calcium chlorid,

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Description

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UNITED STATES PATENT OFFICE.
WALTER DAGNALL, 0F HAMPTON WICK, ENGLAND.
PROCESS OF MANUFACTURING PABCI-IMENT-PAPER.
Title librawing.
sulfurous acid of different strength, viz. the first bath with sulfuric acid and Water 1 of a specific gravity of 1.700 to 1.800 to which is added sulfurous acid to reduce it until it registers 1.750 and the secondbath, of which the sulfuric acid is of the same strength but the sulfurous acid is admixed in greater quantity to reduce it to a specific gravityvarying from 1.200 to 1.400, all solutions losing at aloout 60% F., the strength of the acid varying according to the quality and texture of the paper I wish to impregnate or parchmentize, i. e. the thicker the paper, the greater the strength of acid required. Then the paper is Washed and afterward passed throughan alkali bath and again washed and softened in any lrnown manner either by glycerin, calcium chlorid, salt, or thelike. In this latter process the paper or parchment ma be loaded with any suitable materia or mineral earth.
In carrying my invention into'practice the paper is first run or passed from the reel into the first acid bath which is kept cool. It is then squeezed and the surplus acid returned to the first bath, it is then passed under rollers to the second bath (which is likewise kept cool,) squeezed between rollers, and the surplus acid returned to the second bath, care being taken that the specific gravity of the acid in these baths in in conformity with the limits aboveetated. It is essential that the acid baths do not rise above 60% F. since this would deteriorate the paper. The paper is then passed between water sprays and well washed to remove the acid, is then passed between rollers and squeezed, and then passed through an alkali bath to remove IIBSSBS.
Specification of Letters-Patent. Patented Mar. 23, 1920.
Application filed February 4, 1919. Serial 1 Io. 275,006.
any remaining acid that may be left in. The paper is then passed between rollers and squeezed .and again passed through water sprays and then between rollers and squeezed and then, if required, through the softening bath of glycerin, calcium chlorid,
salt, or the like (which latter bath may be heated by a steam coil). The paper is then squeezed again between rollers and finally a dried,
calendered and cut up ready for marke By my invention the papers may be more thoroughly and quickly treated and at the same time thoroughly parchmentized, hence a greater quantity can be parchmentized Within a given period than by known processes, which makes it more economical and hence cheaper to work and the parchment paper is of superior quality because of its not being brittle.
What I do .claim as my invention, and desire to secure by Letters Patent, is
1. Process of treating paper to render it like parchment, and waterproof, acid proof and ofgreat strength, consisting in' passing paper through a bath of sulfuric acid gravity of from 1.700 to 1.7 50, squeezing the paper after leaving sald bath, t en passin the paper through a loath'of sulfuric i101 and water of specific gravity of 1.800 reduced by sulfurous acid to a specific gravity of from 1.200" to 1.400 at 60 F., and then again squeezing, the paper.
In testimonywhereof I have hereunto setv my hand in" presence of two subscribing wit- WALTER DAGNALL.
Witnesses:
J. M. Bnn'rrrunor,
WM. A. Brown.
. of specific gravity of 1.800 admixed with Q 'sulfurous acid -to reduce to a specific
US275006A 1918-02-28 1919-02-04 Process of manufacturing parchment-paper Expired - Lifetime US1334843A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3598/18A GB123594A (en) 1918-02-28 1918-02-28 An Improved Process for the Manufacture of Parchmentized or like Paper.

Publications (1)

Publication Number Publication Date
US1334843A true US1334843A (en) 1920-03-23

Family

ID=23050514

Family Applications (1)

Application Number Title Priority Date Filing Date
US275006A Expired - Lifetime US1334843A (en) 1918-02-28 1919-02-04 Process of manufacturing parchment-paper

Country Status (3)

Country Link
US (1) US1334843A (en)
FR (1) FR495742A (en)
GB (1) GB123594A (en)

Also Published As

Publication number Publication date
FR495742A (en) 1919-10-16
GB123594A (en) 1919-02-28

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