US3512727A - Pressure roll beam in a longitudinal sheet cutter - Google Patents

Pressure roll beam in a longitudinal sheet cutter Download PDF

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Publication number
US3512727A
US3512727A US712667A US3512727DA US3512727A US 3512727 A US3512727 A US 3512727A US 712667 A US712667 A US 712667A US 3512727D A US3512727D A US 3512727DA US 3512727 A US3512727 A US 3512727A
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US
United States
Prior art keywords
pressure roll
roll beam
pressure
rolls
rod
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
US712667A
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English (en)
Inventor
Jaakko Severi Palovaara
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.)
Valmet Oy
Original Assignee
Valmet Oy
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 Valmet Oy filed Critical Valmet Oy
Application granted granted Critical
Publication of US3512727A publication Critical patent/US3512727A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/14—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web
    • B65H18/20—Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web the web roll being supported on two parallel rollers at least one of which is driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/40—Shafts, cylinders, drums, spindles
    • B65H2404/43—Rider roll construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/40—Shafts, cylinders, drums, spindles
    • B65H2404/43—Rider roll construction
    • B65H2404/431—Rider roll construction involving several segments in axial direction

Definitions

  • the present invention concerns a pressure roll beam in a longitudinal sheet cutter.
  • pressure rolls On the lower part of the pressure roll beam in a longitudinal sheet cutter pressure rolls are mounted, which serve to press down on the paper rolls which are being formed, so that the rolls will have an appropriate firmncss.
  • the load imposed by the pressure rolls on the paper rolls must be reduced because the weight of the paper rolls themselves continuously increases.
  • the load of the pressure rolls is caused by the weight of the rolls themselves and by that of the pressure roll beam.
  • the required relief of the load is accomplished by supporting the pressure roll beam at its ends by an appropriate force, diameter of the paper rolls increases. Since the pressure roll beam is supported by its ends, a downward deflection of this beam is caused by its own weight. This deflection increases with increasing support of the pressure roll beam at its ends, that is, with increasing relief of the load.
  • the harder rolling of the rolls in the center also implies that their diameter will be smaller than that of the rolls on the sides, and correspondingly also their peripheral velocity will be smaller than that of the outermost rolls, a circumstance which may cause wrinkling of the paper during the sheet cutting process.
  • the object of the present invention is to eliminate the above-mentioned difiiculties encountered in the re-rolling of the cut paper in a longitudinal sheet cutter.
  • the invention is accordingly characterized in that in order to cancel the deflection of the pressure roll beam caused by its proper weight, either entirely or in part, there has been provided to act on the part of the pressure roll beam above its neutral axis a mechanical, hydraulic or pneumatic device which produces in the part of the pressure roll beam above said neutral axis a longitudinal tensile which is increased as the.
  • the mechanical devices may then consist of bell cranks attached to it, one arm of each bell crank engaging a rod which is parallel to the pressure roll beam and is carried in guide brackets attached to it, while the other arms are connected to the chains supporting the pressure roll beam.
  • the mechanical device consists of hydraulic or pneumatic cylinders at the ends of the pressure roll beam, the piston rods of which engage a rod parallel to the beam and carried in guide brackets attached to it.
  • FIG. 1 shows a previously known longitudinal sheet cutter in frontal view, and FIG. 2 shows the same, viewed from one end.
  • FIG. 3 shows a pressure roll beam according to one of the embodiments of the invention.
  • FIG. 4 shows a pressure roll beam according to another embodiment of the invention.
  • FIG. 5 shows a pressure roll 'beam according to a third embodiment of the invention.
  • FIG. 6 shows a pressure roll beam according to a fourth embodiment of the invention.
  • the reference numeral 1 in FIGS. 1 and 2 indicates the pressure roll beam with which this invention is concerned.
  • the pressure roll beam 1 moves in vertical direction along its guides on the bed pylons 2, supported by chain 3.
  • On the lower part of the beam 1 the bearing housing for the pressure rolls 5, 4, have been mounted.
  • a rod 10 extending parallel to said beam and which is carried in guide brackets 11 attached to the pressure roll beam 1.
  • the rod 10 is free to move in the brackets 11 in its longitudinal direction, but the rod 10 may be immovably fixed to the central bracket 11.
  • :bell cranks 12 pivoted on pivot pins fixed to the beam and turning in the vertical plane have been mounted. Their arms 12 pointing upward press against the rod 10 above the pressure roll beam because to the outward-pointing arms of the bell cranks there have been attached the chains 3 supporting the pressure roll beam with its accessory equipment.
  • the pressure roll beam exerts pressure, by virtue of its proper weight, through the vertical bell crank arms on the ends of the rod 10, which in its turn causes a force to act on the pivot pins of the bell cranks 12 on the pressure roll beam, this force tending to draw these pivot points apart.
  • the result is that a stress is set up in the pressure roll beam, which tends to compensate the deflection of the said beam.
  • the proportion of the vertical and horizontal arms of the bell cranks 12 determines the magnitude of the deflection-compensating stresses produced in the pressure roll beam.
  • the horizontal arm of each bell crank 12 is loaded by a force equalling half the total weight of the pressure roll beam.
  • the upper part of the pressure roll beam 1 has been provided with attachments equivalent to those illustrated by FIG. 3, but in addition the part of the pressure roll beam below its neutral axis has been provided with a device serving to compensate for the deflection in the lower part of the beam.
  • This device is equivalent in design to that in the upper part of the pressure roll 'beam. It comprises a rod 13 parallel to the said beam and carried in guiding brackets 14 fixed to this beam, and bell cranks 15 mounted on the beam and tumable in the vertical plane, the pivot points of which are located above the rod 13. The arms of the bell cranks pointing downward engage the ends of the rod 13, and their arms pointing outward have been attached to the chains supporting the pressure roll beam.
  • the pressure roll beam 1 has been provided with rods and 13 carried in guiding brackets 11 and 14 exactly as in the device illustrated by FIG. 4.
  • the device of FIG. 5 includes hydraulic cylinders 16 and 17, which replace the bell cranks 12 and 13 of the device shown in FIG. 4, and that the pressure roll beam 1 has been directly attached to the chains 3 at its ends.
  • the said hydraulic cylinders 16 and 17 have been mounted on the pressure roll beam 1 on the extensions of the rods 10 and 13, respectively, and the piston rods of the cylinders engage with the said rods 10 and 13.
  • the hydraulic cylinders have been arranged to load the rods as they were loaded in the preceding embodiments, that is, so that compression is provided in the upper rod 10 and tension in the lower rod 13, by which stresses counteracting the deflection are set up in the pressure roll beam.
  • the pressure supplied to the hydraulic cylinder and the area of the pistons in the cylinders determine the magnitude of the deflection-compensating stresses produced in the pressure roll beam.
  • a pressure roll beam In a longitudinal sheet cutter, a pressure roll beam, at least one elongated pressure transmitting device carried by said pressure roll beam, said device extending substantially between opposite ends of the pressure roll beam, and means connected with said device and said pressure roll beam and actuating said device to produce a longitudinal tension in at least a part of the pressure roll beam.
  • said pressure transmitting device comprises an elongated rod and guiding brackets mounted upon said pressure roll beam and carrying said rod
  • said means comprise two bell cranks having pivots mounted in said pressure roll beam, said bell cranks being located adjacent opposite ends of said rod, each bell crank having an arm engaging a separate end of said rod and another arm connected to a separate supporting chain.
  • said pressure transmitting device comprises an elongated rod and guiding brackets mounted upon said pressure roll beam and carrying said rod
  • said means comprise two hydraulic cylinders mounted upon said pressure roll beam adjacent opposite ends thereof, said hydraulic cylinders having piston rods engaging opposite ends of said elongated rod.
  • said pressure transmitting device comprises two rods having pivotally interconnected ends, the opposite ends of said rods being pivoted upon said pressure roll beam adjacent opposite ends thereof, said two rods extending at an obtuse angle to each other, and wherein said means comprise a hydraulic cylinder mounted upon said pressure roll beam and having a piston rod engaging the interconnected ends of said two rods.
US712667A 1967-03-14 1968-03-13 Pressure roll beam in a longitudinal sheet cutter Expired - Lifetime US3512727A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI0756/67A FI42268B (fi) 1967-03-14 1967-03-14

Publications (1)

Publication Number Publication Date
US3512727A true US3512727A (en) 1970-05-19

Family

ID=8504597

Family Applications (1)

Application Number Title Priority Date Filing Date
US712667A Expired - Lifetime US3512727A (en) 1967-03-14 1968-03-13 Pressure roll beam in a longitudinal sheet cutter

Country Status (6)

Country Link
US (1) US3512727A (fi)
DE (1) DE1611778B2 (fi)
FI (1) FI42268B (fi)
GB (1) GB1180302A (fi)
NO (1) NO135520C (fi)
SE (1) SE354308B (fi)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648342A (en) * 1969-04-29 1972-03-14 Ahlstroem Oy Movable combination of rolls
US3837593A (en) * 1971-09-24 1974-09-24 Ahlstroem Oy Supporting-roller reeling apparatus
US4095755A (en) * 1976-03-12 1978-06-20 A. Ahlstrom Osakeyhtio Rider roll assembly in a winder
WO1997016367A1 (en) * 1995-11-01 1997-05-09 Valmet Corporation Method in winding
US20040155138A1 (en) * 2003-02-12 2004-08-12 Maschinenbau Wilhelm Kochsiek Gmbh Winder
US20060113422A1 (en) * 2004-10-21 2006-06-01 Voith Paper Patent Gmbh Winder
EP2199239A1 (en) * 2008-12-22 2010-06-23 Focus S.r.l. Winder for the information of reels of continuous web material
CN106315274A (zh) * 2015-07-01 2017-01-11 大连瑞贤达塑胶有限公司 一种塑料薄膜切割机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5320299A (en) * 1992-01-27 1994-06-14 Beloit Technologies, Inc. Articulated rider roll system and method
DE102011017568A1 (de) 2011-04-27 2012-10-31 Voith Patent Gmbh Wickelvorrichtung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2825217A (en) * 1955-03-01 1958-03-04 Norton Co Ltd Sir James Farmer Mangling machines
US3060843A (en) * 1961-11-09 1962-10-30 Beloit Iron Works Calender stack deflection control
US3097591A (en) * 1961-11-24 1963-07-16 Beloit Iron Works Anti-deflection roll
US3206134A (en) * 1963-12-05 1965-09-14 Diamond Int Corp Web winding apparatus
US3236471A (en) * 1963-12-02 1966-02-22 Beloit Corp Drum winder for paper and the like
US3282526A (en) * 1963-12-06 1966-11-01 Beloit Eastern Corp Drum winder for paper and the like
US3328866A (en) * 1965-07-19 1967-07-04 Mount Hope Machinery Ltd Roll with means for removing longitudinal curvature

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2825217A (en) * 1955-03-01 1958-03-04 Norton Co Ltd Sir James Farmer Mangling machines
US3060843A (en) * 1961-11-09 1962-10-30 Beloit Iron Works Calender stack deflection control
US3097591A (en) * 1961-11-24 1963-07-16 Beloit Iron Works Anti-deflection roll
US3236471A (en) * 1963-12-02 1966-02-22 Beloit Corp Drum winder for paper and the like
US3206134A (en) * 1963-12-05 1965-09-14 Diamond Int Corp Web winding apparatus
US3282526A (en) * 1963-12-06 1966-11-01 Beloit Eastern Corp Drum winder for paper and the like
US3328866A (en) * 1965-07-19 1967-07-04 Mount Hope Machinery Ltd Roll with means for removing longitudinal curvature

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648342A (en) * 1969-04-29 1972-03-14 Ahlstroem Oy Movable combination of rolls
US3837593A (en) * 1971-09-24 1974-09-24 Ahlstroem Oy Supporting-roller reeling apparatus
US4095755A (en) * 1976-03-12 1978-06-20 A. Ahlstrom Osakeyhtio Rider roll assembly in a winder
WO1997016367A1 (en) * 1995-11-01 1997-05-09 Valmet Corporation Method in winding
US5908171A (en) * 1995-11-01 1999-06-01 Valmet Corporation Method and apparatus for reducing the friction coefficient of roll spools during winding of a web
US20040155138A1 (en) * 2003-02-12 2004-08-12 Maschinenbau Wilhelm Kochsiek Gmbh Winder
EP1454858A1 (de) * 2003-02-12 2004-09-08 Maschinenbau Wilhelm Kochsiek GmbH Aufwickler
US20060113422A1 (en) * 2004-10-21 2006-06-01 Voith Paper Patent Gmbh Winder
EP2199239A1 (en) * 2008-12-22 2010-06-23 Focus S.r.l. Winder for the information of reels of continuous web material
CN106315274A (zh) * 2015-07-01 2017-01-11 大连瑞贤达塑胶有限公司 一种塑料薄膜切割机

Also Published As

Publication number Publication date
DE1611778A1 (de) 1971-01-28
FI42268B (fi) 1970-03-02
NO135520C (fi) 1977-04-20
GB1180302A (en) 1970-02-04
NO135520B (fi) 1977-01-10
SE354308B (fi) 1973-03-05
DE1611778B2 (de) 1972-02-10

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