US3672516A - Machine for separating a sheet from a sheet pile - Google Patents

Machine for separating a sheet from a sheet pile Download PDF

Info

Publication number
US3672516A
US3672516A US73972A US3672516DA US3672516A US 3672516 A US3672516 A US 3672516A US 73972 A US73972 A US 73972A US 3672516D A US3672516D A US 3672516DA US 3672516 A US3672516 A US 3672516A
Authority
US
United States
Prior art keywords
bale
sheet
sheets
arms
machine
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
US73972A
Other languages
English (en)
Inventor
Leif Roland Nordstrand
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.)
KAMAS KVARNMASKINER AB
Original Assignee
KAMAS KVARNMASKINER 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 KAMAS KVARNMASKINER AB filed Critical KAMAS KVARNMASKINER AB
Application granted granted Critical
Publication of US3672516A publication Critical patent/US3672516A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods

Definitions

  • the present invention concerns a method for continuously separating a sheet from a pile or bale of sheets of paper pulp, paper or paste-board.
  • the method is primarily intended for application in machines for dry-defibration of paper pulp and for machines concerned with pretreatment of paper pulp for incorporation in chemical processes such as the manufacture of rayon.
  • the problem involved in mechanical transfer of paper pulp in the shape of a bale to a continuously advanced string or web may be divided into several difficult sub-problems, particularly as it is desirable to provide a machine assembly which is small in volume and also economical and which is suitable as a pretreatment machine in the manufacture of for instance compresses for baby napkins and similar products.
  • the present invention concerns a method of separating, by means of a body of essentially wedge-shaped configuration in side projection one or several sheets from the bale and of transferring said sheets onto a conveyor means to be fed to a rotating cutter disintegrating the sheets into smaller pieces.
  • the characterizing feature of the invention is that the method comprises supporting the bale through resting at least one marginal portion of the free, flat surface of the sheet closest to the wedge-shaped body and the top center of said surface in contact with one or several supporting arms which are movable relatively said sheet surface, as well as in contact with an abutment means, and penetrating the wedge-shaped body while keeping the preferably rounded edge of said body at a preferably adjustable distance from the abutment means, down into the sheet bale between the sheets thereof while the abutment means is simultaneously swung away, whereby a predetermined number of sheets are separated from the sheet bale.
  • a primary desideratum is also that the flow of finely disintegrated pulp discharged from the cutter is well metered and thus also completely continuous.
  • This latter requirement has been solved in a machine in accordance with the invention in that the speed at which the pulp sheets are fed to the cutter is controlled by the flow of current supplied to the electric motor operating the cutter such that upon an increase of load on the motor, the sheet feeder speed is reduced, and vice versa.
  • the discharge of disintegrated pulp is thus kept reasonably constant, even if the sheets fed to the cutter may vary in thickness, as might be the case when folded or partly deformed sheets are fed into the apparatus.
  • the invention also concerns a machine for performing the method in accordance with the invention.
  • FIGS. 1 and 2 illustrate a vertical section through the machine in accordance with the invention during the separation of one sheet from the bale
  • FIG. 3 is a side view of the knife incorporated in the separating mechanism of the machine
  • FIG. 4 is an end view of said knife
  • FIG. 5 is a plan view of said knife
  • FIG. 6 shows the machine from the front.
  • the machine as illustrated on the drawings consists of a feeder belt 2 for advancing a bale 1 consisting of sheets, a separating mechanism 3, a conveyor 4 provided with follower rims 5 and feeder rolls 6, 7, and a rotating cutter 9 which is provided with rotating blades 8 and disposed in a rotor casing 11 having an outlet opening 10 for discharge of defibrated pulp.
  • the separating mechanism 3 comprises a knife 12 the shape of which is illustrated in detail in FIGS. 3-5.
  • the knife consists of sheet metal having a thickness of 2.5 mm and it presents a rounded edge 13 (FIG. 5) and curved indentations l4, 15.
  • the entire sheet metal knife is bent as illustrated in FIG. 4 such that it receives the wedge-shaped configuration in lateral view illustrated in FIG. 3.
  • the knife is axially displaceable by means of a hydraulically operated piston and cylinder unit 16.
  • the separating mechanism 3 also comprises an abutment means 17 which is arranged to cooperate with the knife and is movable so as to be swung away preferably against the action of a spring (not shown), the bale 1 advanced on the feeder belt 2 being adapted to rest by means of its surface against said abutment means close to the upper edge.
  • the abutment means 17 is situated midway between two continuous chains 18, 19 which are driven synchronously over pulleys 20, 21 in mutually opposite directions as illustrated by the arrows in FIG. 6).
  • On the chains 18, 19 are mounted sets of supporting arms 22 and 23. The chains 18, 19 are operated in such a way that the sheet bale 1 alternately rests against the set of supporting arms 23 and the set of supporting arms 22.
  • Reference numeral 24 designates a rotatably mounted roll supporting from underneath the front edge of the sheet bale l.
  • the machine operates in the following manner.
  • the pulp bales l are deposited on the feeder belt 2 which inclines slightly downwards towards the separating mechanism 3 and such that the front side of the bale rests against the supporting arms 23 and against the abutment means 17.
  • the knife 12 starts its downward movement while cutting by means of its edge 13 down through the bale.
  • the right-angle space between knife 12 and abutment means 17 is so adjusted that one single sheet 1 is being separated from the bale l by means of the knife 12. If a larger number of sheets is to be separated from the bale, the said space is made accordingly wider.
  • the abutment means 17 starts moving outwards (to the right with reference to FIGS. 1 and 2).
  • the knife continues its downward cutting movement between the bale sheets whereby the sheet (or sheets) being separated is (or are) being bent forwards in view of the wedge-shaped lateral profile of the knife.
  • the chains 18, 19 start moving downwards, displacing the arm sets 23 downwards and bringing the arm sets 22 to engage in the gap formed by the knife 12 at the upper portion of the bale 1 (FIG. 2) between the latter and the sheet 1' being separated therefrom.
  • the chains are being moved until the sets of arms 22 assume the position which the other sets of arms 23 just assumed, and thus they now form supports for the sheet bale 1.
  • the knife 12 returns to its upper position (original position) above the upper bale edge, and the abutment means 17 is again swung inwards towards the bale edge.
  • the sheet 1' when separated, falls down on the conveyor belt 4 and is being advanced by the follower rims 5 and the advancing rolls 6, 7 up to the cutter 9.
  • the blades 8 reduce the pulp sheet 1' into smaller pieces and the mass, thus finely disintegrated, is discharged from the cutter casing 11 through the outlet opening 10.
  • This separating procedure may be repeated by means of a device triggering off the movement of the mechanism when the pulp sheet 1, just separated from the bale, is at an appropriate point on the belt 4, thus ensuring that a continuous row of pulp sheets are fed to the cutter 9.
  • the supporting arms 22, 23 preferably have their front edges, as seen in the direction of movement, sharpened to a cutting edge such that they are able to cut through folded sheets which may be present in pulp sheet bales.
  • a machine realizing the method in accordance with the invention may be incorporated in a hammer mill or the like wherein the pulp material discharged through the outlet opening may be further reduced.
  • Such an arrangement is particularly suitable for production lines adapted for the manu facture of liquid-absorbing compresses for use in baby napkins, sanitary towels, protection pads for beds of long-tenn patients and like uses.
  • a machine for separating one or several sheets from a bale of paper, pasteboard or paper pulp including in combination underlying support means for supporting the bale by receipt of the sheet edges of said bale thereon, a first set of support arms for supporting the bale through resting thereon at least one marginal portion of the free, flat surface of the end sheet in said bale, said arms being movable across and beyond said sheet surface, abutment means initially in the plane of said support arms and yieldingly urged in contact with said bale, a body of wedge-shaped configuration in side projection supported above said bale, piston means for moving said body down into the bale between certain end sheets thereof and forcing said abutment means and the sheets between the body and abutment means from said bale as said arms are moved across the end surface of the bale whereby a predetermined number of sheets are separated from said bale.
  • a machine in accordance with claim 1 in which a second set of movable support arms and means for for moving said second set of arms are provided whereby said arms can be inserted in a gap being formed by the wedge-shaped body between said sheets under separation and the rest of the bale of sheets for facilitating separation of said sheet.
  • a machine according to claim 2, in which the means for moving said first and second set of support arms include continuously driven chains arranged such that one set of arms at a time is insertable from each side of the bale into the gap being formed during separation of one sheet from the rest of the bale of sheets, while the second set of supporting arms is being swung away by said chains out of contact with the said bale.
  • said body consists of sheet metal bent into channel-shape and presenting a preferably rounded edge at the central portion of one end of said body, and wherein curved recesses extend from said edge outwards towards the sif ie p ort i ons of the said body.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
US73972A 1969-09-23 1970-09-21 Machine for separating a sheet from a sheet pile Expired - Lifetime US3672516A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE13047/69A SE335469B (xx) 1969-09-23 1969-09-23

Publications (1)

Publication Number Publication Date
US3672516A true US3672516A (en) 1972-06-27

Family

ID=20296734

Family Applications (1)

Application Number Title Priority Date Filing Date
US73972A Expired - Lifetime US3672516A (en) 1969-09-23 1970-09-21 Machine for separating a sheet from a sheet pile

Country Status (5)

Country Link
US (1) US3672516A (xx)
DE (1) DE2045996A1 (xx)
FR (1) FR2062806A5 (xx)
GB (1) GB1284503A (xx)
SE (1) SE335469B (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5387078A (en) * 1993-11-10 1995-02-07 General Binding Corporation Disk lift separator
US5482428A (en) * 1994-08-11 1996-01-09 Aluminum Company Of America Apparatus and method for separating stacked articles
US9637326B2 (en) * 2015-04-10 2017-05-02 Jimmy W. Barr Tray separator method and apparatus
US11045813B2 (en) * 2013-10-28 2021-06-29 Postle Industries, Inc. Hammermill system, hammer and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3391806A (en) * 1966-12-19 1968-07-09 Xerox Corp Separator-transfer apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3391806A (en) * 1966-12-19 1968-07-09 Xerox Corp Separator-transfer apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5387078A (en) * 1993-11-10 1995-02-07 General Binding Corporation Disk lift separator
US5482428A (en) * 1994-08-11 1996-01-09 Aluminum Company Of America Apparatus and method for separating stacked articles
US11045813B2 (en) * 2013-10-28 2021-06-29 Postle Industries, Inc. Hammermill system, hammer and method
US11850597B2 (en) 2013-10-28 2023-12-26 Postle Industries, Inc. Hammermill system, hammer and method
US9637326B2 (en) * 2015-04-10 2017-05-02 Jimmy W. Barr Tray separator method and apparatus

Also Published As

Publication number Publication date
FR2062806A5 (xx) 1971-06-25
DE2045996A1 (de) 1971-04-15
GB1284503A (en) 1972-08-09
SE335469B (xx) 1971-05-24

Similar Documents

Publication Publication Date Title
US2882802A (en) Crumpling device
EP1283097B1 (en) Method for pressing powdered material
SU1215614A3 (ru) Устройство дл стапелировани сфальцованных печатных материалов ,подводимых каскадным потоком
US5348527A (en) Apparatus for cutting and stacking a multi-form web
GB2057402A (en) Fiberising sheets of pulp
US3884102A (en) Three knife trimming machine
US4778165A (en) Apparatus for folding and cutting web stacks
US3672516A (en) Machine for separating a sheet from a sheet pile
JPS6026680B2 (ja) 未装本裁断機
US3788180A (en) Slitter for display packages and similar products
US2973678A (en) Cutting and transfer mechanism for gelatinous treating apparatus
GB1333093A (en) Blank cutting apparatus
US3129546A (en) Butter cutting and packaging machine
US2776610A (en) Cutting and creasing press
GB997114A (en) Sheet feeding apparatus
GB1212642A (en) Apparatus for removing packs of sheets from a sheet stack
US3589308A (en) Patty making machine
GB1036126A (en) Improvements in or relating to the manufacture of cellular structural materials
CN113636177B (zh) 一种包装袋拆包装置
US3704735A (en) Automatic splitting machine for hand-opened muffins
GB2163087A (en) Dough manipulation
GB643078A (en) Improvements in a method of cutting pads and rotary apparatus therefor
US2525042A (en) Rotary pad cutting machine and method
US2235745A (en) Juice extractor
KR890002895Y1 (ko) 개피떡의 성형장치