US128625A - Improvement in apparatus for straining paper pulp - Google Patents
Improvement in apparatus for straining paper pulp Download PDFInfo
- Publication number
- US128625A US128625A US128625DA US128625A US 128625 A US128625 A US 128625A US 128625D A US128625D A US 128625DA US 128625 A US128625 A US 128625A
- Authority
- US
- United States
- Prior art keywords
- pulp
- screens
- improvement
- box
- paper pulp
- 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
- 229920001131 Pulp (paper) Polymers 0.000 title description 4
- 239000012535 impurity Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- 239000000835 fiber Substances 0.000 description 4
- 101710043194 APLN Proteins 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 101700065560 andI Proteins 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- MXCPYJZDGPQDRA-UHFFFAOYSA-N dialuminum;2-acetyloxybenzoic acid;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3].CC(=O)OC1=CC=CC=C1C(O)=O MXCPYJZDGPQDRA-UHFFFAOYSA-N 0.000 description 2
- 238000009950 felting Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
- D21D5/023—Stationary screen-drums
- D21D5/026—Stationary screen-drums with rotating cleaning foils
Definitions
- My invention relates to that step in the process of making paper which consists in forcing the diluted pulp through a strainer or screen to separate therefrom knots and other foreign matters, whose presence ⁇ in the paper tends toinjure its texture.
- the screens usually consist of metallic, ⁇ plates, in which parallel grooves are sunk until only thin webs are left, through which webs fine saw-slits are cut, the pulp being delivered upon the flat surfaces of the screenplates or the surfaces opposite the grooves, and the liquid pulp, passing down through the slits, leaves the foreign matters or impurities upon the top.
- all the impurities lodge and must lodge upon the upper surface of the screen, clogging the slits thereof, and, by the abrasion ofthe more gritty impurities, soon wearing and destroying i the edges of the screen-slits.
- the drawing represents a plan of the boxone of the screens being removed-and a crosssection of it.
- a denotes the box, which is or has a longit the box'is charged with the liquid pulp under such head or pressure as shall iill and keep filled the box, the fine pulpy liquid passing freely upward through the screen, while the heavier impurities settle to the bottom, from which they may be removed at suitable times.
- a series of thin slides or sliding blades or agitators g, fixed upon a slide rod or rods, and having aquick reciprocating movement imparted to them by a suitable crank or other mechanism, the agitators being placed at such distance apart and the throw of the crank being such as shall cause them to sweep under the whole surface of the plates above them, the upper edge of each blade or slide extending nearly but not quite up to the under surface of the screens, and their quick movements being such as to keep the pulp in a proper uniform condition as to consistency, and to prevent lodgement of the fibers against the under surface of the screens.
- a guard-rail i, through an opening, k, in which the screened pulp may iiow to any suitable receptacle.
- the box c charged with pulp under pressure, and covered by the screens, and containing a series of rapidly-reciprocating agitators, g, located and operating substantially as described.
Description
\ L. HOLLINGSWORTH.
lmrproverenpin Apparatus for Strlainring Paper-Pufp.
JN0' 1281625* APel'tend-JuI-y 2,1872.-
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UNITED STATES LYMAN HOLLINGSWORTH, OF BOSTON, MASSAOHUSETTS.V
IMPROVEMENT IN APPARATUS FOR STRAINING PAPER PULP.
Specification forming part of Letters Patent No. 128,625, dated July 2, 1872.
To all whom it may concern:
Be it known that I, LYMAN HOLLINGS- WORTH, of Boston, in the county of Suffolk and State ofMassachusetts, have invented an Improvement in the Manufacture of Paper; andI do hereby declare that the following, taken in connection with the drawing which accompanies and forms part of this specification, is a description of my invention sufficient to enable those skilled in the art to practice it.
My invention relates to that step in the process of making paper which consists in forcing the diluted pulp through a strainer or screen to separate therefrom knots and other foreign matters, whose presence `in the paper tends toinjure its texture.
The screens usually consist of metallic,` plates, in which parallel grooves are sunk until only thin webs are left, through which webs fine saw-slits are cut, the pulp being delivered upon the flat surfaces of the screenplates or the surfaces opposite the grooves, and the liquid pulp, passing down through the slits, leaves the foreign matters or impurities upon the top. In this method all the impurities lodge and must lodge upon the upper surface of the screen, clogging the slits thereof, and, by the abrasion ofthe more gritty impurities, soon wearing and destroying i the edges of the screen-slits.
In my invention I use the common form of screens; but, instead of delivering the pulp upon the top to percolate through the slits, I reverse the screen-plates, and form with them the top of an otherwisev tight box, into which box the pulp is forced under pressure, so as to be driven upwardly through the screens, the knots, sand, and other gritty or foreign impurities sinking to the bottom ofthe box instead of lodging upon the screens, the pulpy liquid being agitated by a series of vertical slides to which rapid reciprocating movements are imparted; these vslides being within the box, and extending across in the upper part thereof, directly under but not in contact with the screens, and 'by their movement keeping the screens clear from attachment of the pulpy fibers or the felting thereof against the under surfaces of the screens. It is in this construction and method of screening the pulp that my invention consists.
The drawing represents a plan of the boxone of the screens being removed-and a crosssection of it.
a denotes the box, which is or has a longit the box'is charged with the liquid pulp under such head or pressure as shall iill and keep filled the box, the fine pulpy liquid passing freely upward through the screen, while the heavier impurities settle to the bottom, from which they may be removed at suitable times. Within the upper part of the box -is a series of thin slides or sliding blades or agitators, g, fixed upon a slide rod or rods, and having aquick reciprocating movement imparted to them by a suitable crank or other mechanism, the agitators being placed at such distance apart and the throw of the crank being such as shall cause them to sweep under the whole surface of the plates above them, the upper edge of each blade or slide extending nearly but not quite up to the under surface of the screens, and their quick movements being such as to keep the pulp in a proper uniform condition as to consistency, and to prevent lodgement of the fibers against the under surface of the screens. Around the top of the box ex tends a guard-rail, i, through an opening, k, in which the screened pulp may iiow to any suitable receptacle.
By these means the pulp is more rapidly screened', and the endurance of the screens is greatly increased.
The box c, charged with pulp under pressure, and covered by the screens, and containing a series of rapidly-reciprocating agitators, g, located and operating substantially as described.
LYMAN HOLLINGSWORTH.
Witnesses Farmers GoULn, M. W. FEOTEINGHAM.
Publications (1)
Publication Number | Publication Date |
---|---|
US128625A true US128625A (en) | 1872-07-02 |
Family
ID=2198043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US128625D Expired - Lifetime US128625A (en) | Improvement in apparatus for straining paper pulp |
Country Status (1)
Country | Link |
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US (1) | US128625A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050220445A1 (en) * | 2004-04-02 | 2005-10-06 | Baskar Ashok S | Fastening tool with mode selector switch |
USD841332S1 (en) | 2016-06-27 | 2019-02-26 | Samsonite Ip Holdings S.A R.L. | Luggage wheel fork with a wheel |
-
0
- US US128625D patent/US128625A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050220445A1 (en) * | 2004-04-02 | 2005-10-06 | Baskar Ashok S | Fastening tool with mode selector switch |
USD841332S1 (en) | 2016-06-27 | 2019-02-26 | Samsonite Ip Holdings S.A R.L. | Luggage wheel fork with a wheel |
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