US1553976A - Method of manufacturing paper pulp - Google Patents

Method of manufacturing paper pulp Download PDF

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Publication number
US1553976A
US1553976A US440470A US44047021A US1553976A US 1553976 A US1553976 A US 1553976A US 440470 A US440470 A US 440470A US 44047021 A US44047021 A US 44047021A US 1553976 A US1553976 A US 1553976A
Authority
US
United States
Prior art keywords
lye
fibres
paper pulp
cylinder
treatment
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
US440470A
Other languages
English (en)
Inventor
Bernot Victor
Fournier Pierre Raymond
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.)
"LA PAILLE INDUSTRIELLE" Ste
PAILLE IND SOC
Original Assignee
PAILLE IND SOC
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
Priority to NL11900D priority Critical patent/NL11900C/xx
Application filed by PAILLE IND SOC filed Critical PAILLE IND SOC
Priority to US440470A priority patent/US1553976A/en
Priority to GB382821A priority patent/GB178962A/en
Priority to DEB98060D priority patent/DE407832C/de
Application granted granted Critical
Publication of US1553976A publication Critical patent/US1553976A/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
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/24—Continuous processes

Definitions

  • This invention relates -to a method and apparatus for the manufacture of paper pulp.
  • the current method of manufacture of paper pulp comprises a series of successive operations such as sorting the raw material in the shape of natural or artificial vegetable fabrics, Washing or dust removal, cutting up, lye treatment, washing after the same, separation of fibres, bleaching; and subsequent Washing.
  • the most important of these operations are the lye treatment and the separation of fibre.
  • the first of these operations serves to dissolve as much as possible the foreign bodies which surround and connect the fibres of pure cellulose, and is usually carried out in a digester at a pressure of about 3 kilogrammes per square centimeter, the Operation lasting from' 2 to 8 hours, or often more.
  • the lye-treated rlaterial is submitted to a fibre separating process, for the purpose of separating the fibres Which are still collected in larger or smaller masses.
  • This mechanical operation is generally carried out in a drum containing fixed and moving blades.
  • the paper pulp which is thus Obtained is only in the partially finished condition, inasmuch as it is not homogeneous and requires to be refined in order toi be used for'the manufacture of high grade paers.
  • the process of manufacture as thus carried' out requires successive treatments of the material, and cannot be considered as a continuous process.
  • Figure 1 is a diagrammatic view of the Whole series of apparatus.
  • Figure 2 is a longitudinal section of a lye-treating apparatus and alfibre-s'eparating apparatus suitably combined.
  • Figure 3 is an elevational View of one of the perforated plates.
  • the lye-treating apparatus comprises a horizontal cylinder 1 Whereon is disposed a feed hopper 2 employed for the continuous feeding of the ve etable matter to be treated 4by the lye-bat
  • the said cylinder contains ashaft 3 having formed or secured thereon a screw conveyor 4 for propolling the material under treatment from the ⁇ end adjacent the feeding hopper to theopposite end of the device.
  • a portion of the said screw-member is preferably adapted to cooperate with the internal edge.
  • a member 6 in the form of a wheel which is loosely rotatable upon the shaft thereof 7 and engages the threads o-f the screw member 4.
  • the said wheel serves to prevent the free movement of the material about the said screw, member which might take place in spite of the fluid nature thereof, and the material is now obliged to move forward as the screw rotates.
  • the said cylinder which is chiefiy -used for the lye treatment, is heated, if
  • the duration of the lye treatment does not usually exceed 30 minutes.
  • the matter which arrives at the end 9 of the cylinder still retains substantially the same shape as it had at the feeding end, and the separation of the material is carried out chiefiy in the fibre-separatingapparatus. It may however be advantageous to dispose adjacent the perforated end- 9 of the cylinder 1 a rotary knife 10 for a rough cutting up of the fibrous matter, the said knife cooperating with the bottom part 9 somewhat after the manner of the knife member and perforated type of meat cutter.
  • the fibre-separating apparatus comprises a cylinder 11 preferably disposed in alignment with the lye-treating cylinder and having therein a series of stationary partitions 12a, 12b, 12 etc. forming various chambers, 10 for instance, such as 13, 13b', .13 etc. the said partitions being provided with the apertures 14a, 14b etc.l of decreasing width, the apertures 14a having for instance several centimeters width whereas lthe apertures 14k are reduced to very narrowslits for the purpose of allowing only the individual fibres to pass through, Within the said chambers are disposed the rotary stirring members 15, 15" 15k which are secured to the shaft 16 disposed according to the axis of the cylinder 11.
  • the said shaft is situated preferably within the shaft 3, this latter being made hollow to this effect, and it also carries the rotary knife 10.
  • the shafts 3 and 16 are actuated for instance by belting disposed u on the pulleys 17 and 18 or by gearing or t e like, 1n such manner as to effect the rotation of the stirring members 15 at a much higher speed than that of the screw 4, whereby the forward movement of the lye bath and the material shall be much slower than that of out through the slits of the partition 12k.
  • the paste drops into one or more filter presses 19 of any suitable construction whereby the cellulose fibres are retained and separated from the lyebath.
  • the lye bath which is discharged from the filter press'or presses kis conducted through the piping 20 to a pump 21 or other elevating device which returns the same to the hopper 21
  • the fibres remaining in the filtering devices are discharged therefrom at more or less frequent intervals or by a continuous process, according to the character of the apparatus employed, and the libres are then ready for the washing process. After a sufficient washing, they constitute a pulp which is suitable for paper manufacture.
  • the apparatus takesup but a small space and requires a minimum of hand labor.
  • the lye bath is used in a systematic and complete manner, resulting in a minimum w cost of lye substances.
  • the quantity of material under treatment at any given moment is relatively small, whencev it follows that a large or small amount of substance may be treated with equal facility and with the same relative economy, and a great variety of substances can be treated successively without requiring any stoppage or cleaning of the apparatus, whereby paper paste of various qualities may be produced in a continuous manner.
  • a process for the manufacture of paper paste in an endless current of suitable liquid wherein the raw brous substances are introduced in a continuo/us manner at a given point of the said current and are caused to pass through the libre-removing elements ater having vbeen saturated With the said liquid, the bres being removed from the current a second point in the stream of liquid in the form of a pulp Which is ready for use, ⁇ whereby the liquid does not pass again through the same points before all the fibres are removed.

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  • Paper (AREA)
US440470A 1921-01-27 1921-01-27 Method of manufacturing paper pulp Expired - Lifetime US1553976A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL11900D NL11900C (enrdf_load_stackoverflow) 1921-01-27
US440470A US1553976A (en) 1921-01-27 1921-01-27 Method of manufacturing paper pulp
GB382821A GB178962A (en) 1921-01-27 1921-02-01 Improved method for the manufacture of paper pulp and apparatus therefor
DEB98060D DE407832C (de) 1921-01-27 1921-02-03 Verfahren und Vorrichtung zur Herstellung von Papierstoff in einem ununterbrochenen Strom von Aufschlussfluessigkeit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US440470A US1553976A (en) 1921-01-27 1921-01-27 Method of manufacturing paper pulp

Publications (1)

Publication Number Publication Date
US1553976A true US1553976A (en) 1925-09-15

Family

ID=23748879

Family Applications (1)

Application Number Title Priority Date Filing Date
US440470A Expired - Lifetime US1553976A (en) 1921-01-27 1921-01-27 Method of manufacturing paper pulp

Country Status (3)

Country Link
US (1) US1553976A (enrdf_load_stackoverflow)
DE (1) DE407832C (enrdf_load_stackoverflow)
NL (1) NL11900C (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2645982A (en) * 1949-11-14 1953-07-21 Cowles Co Apparatus for treating paper stock
US2657131A (en) * 1949-05-26 1953-10-27 American Defibrator Discharge device for finely divided fibrous material from a pressure system
US2718178A (en) * 1948-02-04 1955-09-20 Wandel Kurt Machine for effecting a refining treatment of fibrous material
US2730931A (en) * 1948-12-31 1956-01-17 Reisten Werner Mill for fibrous substances
US4121967A (en) * 1976-09-07 1978-10-24 Reinhall P G Screw conveyor in pulp-making equipment
US20050172837A1 (en) * 2004-02-09 2005-08-11 Derek Flor Screw press with radial gate valve and supported screw shaft

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745116C (de) * 1941-07-02 1944-02-26 Johannes Jung Vorrichtung zum Zerfasern von Rinden, Borken, Bast, Holzsplittern u. dgl.
DE1047000B (de) * 1953-09-30 1958-12-18 Aschaffenburger Zellstoffwerke Verfahren zur Herstellung von Halbzellstoff
DE1051109B (de) * 1953-09-30 1959-02-19 Aschaffenburger Zellstoffwerke Verfahren zur Herstellung von Halbzellstoff

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2718178A (en) * 1948-02-04 1955-09-20 Wandel Kurt Machine for effecting a refining treatment of fibrous material
US2730931A (en) * 1948-12-31 1956-01-17 Reisten Werner Mill for fibrous substances
US2657131A (en) * 1949-05-26 1953-10-27 American Defibrator Discharge device for finely divided fibrous material from a pressure system
US2645982A (en) * 1949-11-14 1953-07-21 Cowles Co Apparatus for treating paper stock
US4121967A (en) * 1976-09-07 1978-10-24 Reinhall P G Screw conveyor in pulp-making equipment
US20050172837A1 (en) * 2004-02-09 2005-08-11 Derek Flor Screw press with radial gate valve and supported screw shaft
US7152522B2 (en) * 2004-02-09 2006-12-26 Derek Flor Screw press with radial gate valve and supported screw shaft
WO2006086290A3 (en) * 2005-02-08 2007-06-21 Derek Flor Screw press with radial gate valve and supported screw shaft

Also Published As

Publication number Publication date
NL11900C (enrdf_load_stackoverflow)
DE407832C (de) 1925-01-02

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