US219407A - Improvement in processes of - Google Patents
Improvement in processes of Download PDFInfo
- Publication number
- US219407A US219407A US219407DA US219407A US 219407 A US219407 A US 219407A US 219407D A US219407D A US 219407DA US 219407 A US219407 A US 219407A
- Authority
- US
- United States
- Prior art keywords
- pulp
- paper
- gypsum
- improvement
- time
- 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
Links
- 238000000034 method Methods 0.000 title description 6
- 239000010440 gypsum Substances 0.000 description 18
- 229910052602 gypsum Inorganic materials 0.000 description 18
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L Calcium sulfate Chemical class [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 14
- 229920001131 Pulp (paper) Polymers 0.000 description 12
- 239000000835 fiber Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000004061 bleaching Methods 0.000 description 4
- 239000007844 bleaching agent Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 210000003298 Dental Enamel Anatomy 0.000 description 2
- 241001486234 Sciota Species 0.000 description 2
- 229940082569 Selenite Drugs 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical class OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000010441 alabaster Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- MCAHWIHFGHIESP-UHFFFAOYSA-L selenite(2-) Chemical compound [O-][Se]([O-])=O MCAHWIHFGHIESP-UHFFFAOYSA-L 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
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
- D21H17/70—Inorganic compounds forming new compounds in situ, e.g. within the pulp or paper, by chemical reaction with other substances added separately
Definitions
- lime- such as crystallized selenite, alabaster, &c.-and in a suitable machine crush and reduce it to a condition proper to refine, bleach, and grind. I then refine and bleach it, as
- this anhydrous gypsum passes under or through the beater with the pulp the particles of gypsum are separated by and intermixed with the fibers of the pulp, which fibers, in their sepa- It is best to add this anhydrous gypsum to the pulp when it (the pulp) is about half beaten, although it can be introduced at any time desired, the fibers of the pulp being then sufficiently fine for good results, as by the time the pulp is fully beaten and prepared for use in the making of it into paper the water of the pulpwill have had time to combine with the anhydrous gypsum, and have accomplished its disintegration.
- the particles of gypsum will not have time to set and harden or lump before they pass under or through the beater, where they are separated by and intermixed with the fibers of the pulp, and disintegration accomplished, substantially as described. may be required, by the use of muriatic or It has been found by practical experiments that once passing of the gypsum through or under the beater is sufficicnt to effectually prevent any setting or hardening of the gypsum.
- the refining and bleaching process need not. be carried to its full extent, as is obvious; also, in lieu of introducing the anhydrous gypsum into the pulp while it is being beaten in the engine, it can be added at any time desired; but as above described is preferable, and the best practical results are obtained at a saving of time, labor, and expense.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Description
UNITED "STATES PATENT; OFFIoE.
JOHN MANNING, OF WINDSOR, NOVA SOOTIA, CANADA.
I IMPROVEMENT IN PROCESSES 0F APPLYING GYPSUM IN THE MANUFACTURE OF PAPER.
Specification forming part of Letters Patent No. 219,407, dated September 9,1879; application filed February 7, 1879.
To all whom it may concern:
Be it known that I, JOHN MANNING, of Windsor, in the county of Hants, in the Province of Nova Scotia, Dominion of Canada, have invented a new and useful Improvement in the Manufacture of Paper, of which the following is a specification.
of lime-such as crystallized selenite, alabaster, &c.-and in a suitable machine crush and reduce it to a condition proper to refine, bleach, and grind. I then refine and bleach it, as
sulphuric acids, in the usual manner of refining and bleaching with such acids. The material is then washed, floated, and dried, and then ground in a suitable grinding-mill to a very fine powder and bolted, and then this powdered gypsum is made anhydrous in the usual manner. It is now in proper condition a be combined with paper-pulp, which is accomplished in the following manner:
Into paper-pulp which is being reduced in a paper-pulp engine to a fine condition I slowly sift or riddle some of this anhydrous gypsum, to the amount desired to be combined with the paper-pulp, at a point in the paper-engine tank as near to the beater as possiblethat is, at that side of the beater where the pulp in its movements to be beaten passes under or through it. As this anhydrous gypsum passes under or through the beater with the pulp the particles of gypsum are separated by and intermixed with the fibers of the pulp, which fibers, in their sepa- It is best to add this anhydrous gypsum to the pulp when it (the pulp) is about half beaten, although it can be introduced at any time desired, the fibers of the pulp being then sufficiently fine for good results, as by the time the pulp is fully beaten and prepared for use in the making of it into paper the water of the pulpwill have had time to combine with the anhydrous gypsum, and have accomplished its disintegration. I
By sifting the gypsum into the pulp close to the beater, as described, the particles of gypsum will not have time to set and harden or lump before they pass under or through the beater, where they are separated by and intermixed with the fibers of the pulp, and disintegration accomplished, substantially as described. may be required, by the use of muriatic or It has been found by practical experiments that once passing of the gypsum through or under the beater is sufficicnt to effectually prevent any setting or hardening of the gypsum.
It is best to put only a small quantity of the gypsum into the pulp at one time-say about ten to twelve per cent. of the gypsum to the amountv of pulp-allowing it to become combined with the water and disintegrated first, when a little more can be added, and so on until the full amount required is combined with the pulp.
In making paper of an inferior quality, or when it is not desired to be very white, the refining and bleaching process need not. be carried to its full extent, as is obvious; also, in lieu of introducing the anhydrous gypsum into the pulp while it is being beaten in the engine, it can be added at any time desired; but as above described is preferable, and the best practical results are obtained at a saving of time, labor, and expense.
Using anhydrous gypsum, substantially as above described, in the manufacture of paper,
a larger proportion of it adheres to the pulp-- say eighty or ninety per cent.than heretofore in the use of such substances for similar purpose, and by this mode of combining the two-that is, the anhydrous gypsum with the paper-pulp--the cost of the manufacture of paper is greatly reduced, dispensing with expensive and cumbersome machinery, as at present employed in preparing gypsum for such use, much labor and time are saved, and of paper, substantially as described, the same the quality of the paper improved, as it is consistingin sifting powdered anhydrous gypwln'ter, harder, and firmer, and, when calensum into the paper-pulp While the pulp is be- (lered, will have a beautiful enamel finish. ing beaten in a paper-pulp-beating engine.
Having thus described my invention, What JOHN MANNING. I claim, and desire to secure by Letters Patent, Witnesses is- EDWIN W. BROWN,
The improved process in the manufacture GEO. H. EARL.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US219407A true US219407A (en) | 1879-09-09 |
Family
ID=2288808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US219407D Expired - Lifetime US219407A (en) | Improvement in processes of |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US219407A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2680072A (en) * | 1949-09-29 | 1954-06-01 | A M Meincke & Son Inc | Method of forming paper |
-
0
- US US219407D patent/US219407A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2680072A (en) * | 1949-09-29 | 1954-06-01 | A M Meincke & Son Inc | Method of forming paper |
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