US3147883A - Discharging cellulosic fibrous material in bulk form - Google Patents

Discharging cellulosic fibrous material in bulk form Download PDF

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Publication number
US3147883A
US3147883A US20868A US2086860A US3147883A US 3147883 A US3147883 A US 3147883A US 20868 A US20868 A US 20868A US 2086860 A US2086860 A US 2086860A US 3147883 A US3147883 A US 3147883A
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United States
Prior art keywords
fibrous material
pocket
pulp
elevator
bulk form
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
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US20868A
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English (en)
Inventor
Jakobson Karl Folke Olof
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A EKSTROMS AB
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A EKSTROMS AB
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 A EKSTROMS AB filed Critical A EKSTROMS AB
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Publication of US3147883A publication Critical patent/US3147883A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G65/00—Loading or unloading
    • B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
    • B65G65/34—Emptying devices
    • B65G65/40—Devices for emptying otherwise than from the top
    • B65G65/42—Devices for emptying otherwise than from the top using belt or chain conveyors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G3/00—Storing bulk material or loose, i.e. disorderly, articles
    • B65G3/04—Storing bulk material or loose, i.e. disorderly, articles in bunkers, hoppers, or like containers

Definitions

  • This invention relates to a method of discharging cellulosic fibrous material, such as bagasse, esparto grass, straw and mechanical or chemical cellulose pulp in bulk form with a dry content preferably exceeding 30% and a device for carrying out the method.
  • Said known discharge devices may be bottom gates to be opened, rotary, plane or conical bottoms provided with scraper means, scraper means travelling across the bottom of the container towards an opening in the container wall, or screws which may be stationary or travelling laterally over a stationary bottom, etc.
  • Said known devices of conventional type have in common that the material to be stored, for example wood chips, is fed into the uppermost portion of the container and discharged from the lowermost one.
  • the aforementioned devices cannot be applied when the cellulose pulp is to be stored in a bulky state, because owing to its structure the pulp has a tendency to stick and to form bridges across the container section.
  • the pulp easily forms hard and large clods blocking the discharge screws owing to the fibrous and sticky nature of the clods and their great inner cohesion.
  • the containers are rather high in relation to the bottom area. Consequently, the material forms high piles exercising a rapidly increasing pressure on the bottom so that the bulk density of the material comprised in the bottom layer is considerably higher than that of the material comprised in the upper layer.
  • the discharge of the material is rendered ditlicult.
  • the constructional design of the containers does not allow the inside inspection of a container, which is a considerable disadvantage, particularly in winter time when the material and particularly its higher compressed parts are subjected to the risk of freezing. In the case of freezing, the discharge of the material is rendered impossible because the material cannot be broken into pieces nor be disengaged. The aforesaid drawbacks are eliminated by the present invention.
  • the method according to the invention is characterized in that the fibrous material in the form of a coherent block is directed towards a pocket disposed below the one end of the container in such a manner that the front end portion of the block breaks oil and falls down into said pocket whereafter the material is discharged by means of an elevator.
  • the pulp is preferably advanced upwardly on said elevator.
  • the apparatus according to the invention is characterized in that one end wall of the container is left out and 3,147,883 Patented Sept. 8, 1964 that the bottom of the container is provided with conveying means for advancing the coherent block of fibrous material to the open end of the container below which a pocket connected to an elevator is disposed, said elevator preferably extending in an inclined upward direction from the bottom of said pocket.
  • the pocket may be provided with a sensing device controlling the supply of the fibrous material.
  • Means for giving the material discharged a definite thickness may be provided at the upper end portion of the elevator.
  • the pulp in bulk form is fed by means of a belt conveyor or from an overlying container at the one end of a longitudinal and upwardly open storage silo 1, the bottom of said silo 1 consisting of an apron conveyor 2 advancing the pulp in the form of a block towards the other, entirely open end side of the silo 1.
  • a dosing pocket 3 is provided below said open end side of the silo from which an elevator 4 extends in an upwardly inclined direction.
  • a sensing device 6 arranged in said pocket 3 interrupts the motion of the conveyor 2 as soon as the indicator is entirely covered by pulp and starts again said conveyor 2 when the indicator means has become free of pulp. If said interruption of the conveyor motion would not occur, the pulp would be pressed with such a force against the elevator 4 that there would be either stoppage or uncontrollable discharge.
  • a perforated conveyor 7 disposed at the inlet of the silo 1 is provided with carriers, for example chains scraping over the formed pulp top and flattening the same so that the pulp may be fed into the silo even if the conveyor 2 is out of function.
  • an equalizing roller for example a roller 8 with spikes or the like, attached to the upper portion of said elevator 4, the pulp layer on the elevator is flattened in such a manner that the pulp always is discharged with a constant thickness and that the surplus material falls down towards the pocket 3.
  • Said roller 8 is vertically adjustable for controlling the discharge quantity, said quantity also being variable by varying the speed of the elevator.
  • the bottom of the silo need not consist of an apron or belt conveyor, as indicated in the drawing, but that the silo may be provided with a stationary bottom with carrier means mounted therein advancing the fibrous material towards the open end side of the silo.
  • the indicating means 6 may be arranged at different places in the pocket so that a suitable quantity of the fibrous material remains in the pocket before the next dosage reaches the pocket.
  • the method of forming a coherent block of cellulosic fibrous material into an attenuated layer of said material 3 4 which comprises supporting said block of material on a of said pocket at a high angle to allow excess material substantially horizontal surface, periodically moving said of said layer to fall back into said pocket.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
US20868A 1959-04-09 1960-04-08 Discharging cellulosic fibrous material in bulk form Expired - Lifetime US3147883A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE3147883X 1959-04-09

Publications (1)

Publication Number Publication Date
US3147883A true US3147883A (en) 1964-09-08

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ID=20428720

Family Applications (1)

Application Number Title Priority Date Filing Date
US20868A Expired - Lifetime US3147883A (en) 1959-04-09 1960-04-08 Discharging cellulosic fibrous material in bulk form

Country Status (2)

Country Link
US (1) US3147883A (enrdf_load_stackoverflow)
SE (1) SE184849C1 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279423A (en) * 1963-06-26 1966-10-18 Brogdex Co Fruit treating apparatus and control means therefor
US3512662A (en) * 1967-11-30 1970-05-19 Tobacco Res & Dev Storage bins
US3686714A (en) * 1969-05-07 1972-08-29 Hergeth Kg Masch Apparate Device for opening bales of textile fibers and the like
US3738476A (en) * 1970-08-06 1973-06-12 Fiber Controls Corp Fiber feeding arrangement
US5129505A (en) * 1991-02-01 1992-07-14 Ameri-Shred Industrial Corp. Paper metering device
US20130292228A1 (en) * 2010-11-03 2013-11-07 Fibrecycle Pty Ltd Paper feeder and method of feeding paper

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR850428A (fr) * 1938-02-23 1939-12-16 Friedrich Haas Kom Ges Maschf Dispositif d'alimentation pour transporteurs à matières fibreuses
US2920355A (en) * 1954-10-14 1960-01-12 Fibrofelt Corp Feed mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR850428A (fr) * 1938-02-23 1939-12-16 Friedrich Haas Kom Ges Maschf Dispositif d'alimentation pour transporteurs à matières fibreuses
US2920355A (en) * 1954-10-14 1960-01-12 Fibrofelt Corp Feed mechanism

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279423A (en) * 1963-06-26 1966-10-18 Brogdex Co Fruit treating apparatus and control means therefor
US3512662A (en) * 1967-11-30 1970-05-19 Tobacco Res & Dev Storage bins
US3686714A (en) * 1969-05-07 1972-08-29 Hergeth Kg Masch Apparate Device for opening bales of textile fibers and the like
US3738476A (en) * 1970-08-06 1973-06-12 Fiber Controls Corp Fiber feeding arrangement
US5129505A (en) * 1991-02-01 1992-07-14 Ameri-Shred Industrial Corp. Paper metering device
US20130292228A1 (en) * 2010-11-03 2013-11-07 Fibrecycle Pty Ltd Paper feeder and method of feeding paper
US9079723B2 (en) * 2010-11-03 2015-07-14 Fibrecycle Pty Ltd Paper feeder and method of feeding paper

Also Published As

Publication number Publication date
SE184849C1 (enrdf_load_stackoverflow) 1963-08-20

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