US3611917A - Calender stack with swimming roll - Google Patents

Calender stack with swimming roll Download PDF

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Publication number
US3611917A
US3611917A US734146A US3611917DA US3611917A US 3611917 A US3611917 A US 3611917A US 734146 A US734146 A US 734146A US 3611917D A US3611917D A US 3611917DA US 3611917 A US3611917 A US 3611917A
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US
United States
Prior art keywords
roll
stack
rolls
nondeflecting
controlled
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
US734146A
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English (en)
Inventor
Rodney Harold Bryce
Robert Maximiliam Vadas
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.)
General Electric Canada Co
Valmet Montreal Inc
Original Assignee
Dominion Engineering Works Ltd
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 Dominion Engineering Works Ltd filed Critical Dominion Engineering Works Ltd
Application granted granted Critical
Publication of US3611917A publication Critical patent/US3611917A/en
Assigned to CANADIAN GENERAL ELECTRIC COMPANY LIMITED- COMPAGNIE GENERALE ELECTRIQUE DU CANADA LIMITEE reassignment CANADIAN GENERAL ELECTRIC COMPANY LIMITED- COMPAGNIE GENERALE ELECTRIQUE DU CANADA LIMITEE CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: DOMINION ENGINEERING WORKS LIMITED
Assigned to VALMET-DOMINION INC. reassignment VALMET-DOMINION INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CANADIAN GENERAL ELECTRIC COMPANY LIMITED,, DOMINION ENGINEERING WORKS LIMITED
Assigned to VALMET-DOMINION INC. reassignment VALMET-DOMINION INC. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: CANADIAN GENERAL ELECTRIC COMPANY LIMITED- COMPANIE GENERAL ELECTRIQUE DU CANADA LIMITEE
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
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/18—Polybenzimidazoles

Definitions

  • gle stack of rolls in place of the usual tandem arrangement is 100/162, promoted by providing an intermediate variable deflection roll and controlling the internal fluid pressure within the roll to control roll deflection under load in relieving or increasing 100/170 [51] Int. 1330b 3/04 [50] Field 100/155, the nip loads in the lower portion of the stack.
  • the inter- 160, 161, 162 A, 164, 168, 170, 171, 176; 29/1 16 mediate roll is supported by end bearings which are provided with control means for applying upward relief force.
  • AD,113AD CALENDER STACK WITH SWIMMING ROLL This invention is directed to an improved calender stack.
  • the roll When a loaded roll is supported by its ends, the roll deflects. in the case of a calender stack, deflection of the bottom roll results in an uneven loading of the paper web, with increased nip pressure at the edges. To overcome this, the bottom calender roll is often crowned, the amount of crown being calculated for the total load above.
  • a known, previous arrangement for improving calender stack arrangements provided an antideflection roll having the supporting shafts of the roll joumaled inboard of the roll ends, at about the quarter-span positions, to improve the deflection characteristic of the roll.
  • Am alternative arrangement incorporates a controllable deflection intermediate roll, in which fluid pressure within the roll is varied, to control the deflection of the roll. This permits greater loading of the upper portion of the calender stack without overloading at the lower nips of the stack.
  • the present invention makes possible the provision of a full stack of high-speed calender rolls, having a large number of rolls, and including an intermediate roll of the nondeflecting or controlled deflection type provided with journal load adjustment means whereby the transference of nip loading from the series of rolls above the nondeflecting or controlled deflection roll to the series of rolls therebeneath may be selectively controlled.
  • the present invention may be practiced using controlled deflection rolls, whichin certain instances may be of the nondeflecting type of swimming roll.
  • the present invention thus provides an apparatus for controlling the calendering pressure exerted on a web passing sequentially through a series of pressure nips provided by a plurality of superposed calender rolls arranged in a single stack, including the step of regulating the downward load exerted on the adjacent lower roll by a controlled deflection roll located intermediately of the rolls, by regulating the forces acting on the supporting journals of the intennediate controlled deflection roll, whereby the nip pressures exerted by all the rolls located below the intermediate roll are correspondingly regulated.
  • the fluid pressure within the controlled deflection roll is adjusted to provide the desired deflection condition of the roll for the related load condition.
  • the apparatus for carrying out the present invention thus comprises a paper calendering roll stack having a plurality of substantially coplanar calender rolls in superposed relation including a controlled deflection roll located in an intermediate position of the stack, haw'ng support bearings at the ends thereof and roll-positioning means acting on the bearings to control the downward load imposed by the nondeflecting roll on the rolls positioned therebeneath, whereby the calendering nip premures of the stack may be controlled.
  • FIG. 1 comprises a partial side view of a calendar stack according to the present invention.
  • FIG. 2 is a view taken in the direction of the arrow A showing the end guide arrangement of the plain rolls of the stack.
  • the calender stack 10 has a bottom roll 12 rotatably mounted in a roll support stand 11.
  • a plurality of plain rolls 14, 16, 22, 24 are mounted in substantial coplanar vertical relation above the lower roll 12, and an intermediate roll 18 of the nondeflecting or Kusters" swimming roll is mounted intermediate the roll stack.
  • the rolls are maintained in vertical alignment by means of bearing guide ring 26 at each end of the stack in guiding relation with roll bearings 28.
  • the adjustable nondeflecting roll 18 is supported by bearings 30 secured to a support arm 32 at each end of the roll.
  • the support arms 32 are pivotally mounted at 34 to a bracket 36 carried by a side frame 38 on which is mounted an actuator 40 pivotally connected at 42 to the support arm 32.
  • the actuator 40 is of the double-acting type, so that either upward or downward loading may be applied to the roll 18.
  • the lower roll 12 is of the nondeflecting type also.
  • a plain roll may prove suitable at this position for certain calendering operations.
  • both sides of the roll form effective nips, thereby providing an additional useable nip.
  • the spanwise deflection loads operating upon the rolls located above the nondeflecting roll are diminished, so that the size of rolls, i.e. the roll diameter, may be reduced thus providing reduction in capital cost.
  • a high-speed paper calender having a full stack of rolls of sufficient self-weight that in an unrelieved condition crushing is caused to a lower one of the nips on passage of a sheet therethrough
  • the improvement comprising intermediate load relief means having a nondeflecting roll rotatably mounted in end bearings, being located a sufficient distance from the top of the stack to provide a desired extent of stack load relief, to relieve the pressures at the nips located therebeneath to values less than that at which crushing occurs, means for applying upward relief force in at least partial supporting relation with said end bearings, and means to precisely control said upwardforce-applying means so as to control limiting nip pressure in the stack, while maintaining all of the nips substantially unbowed.
  • control means for said controlled roll include support-bearing positioning means, whereby the load transfer to rolls positioned therebeneath may be controlled.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
US734146A 1967-06-09 1968-06-03 Calender stack with swimming roll Expired - Lifetime US3611917A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA992576 1967-06-09

Publications (1)

Publication Number Publication Date
US3611917A true US3611917A (en) 1971-10-12

Family

ID=4142930

Family Applications (1)

Application Number Title Priority Date Filing Date
US734146A Expired - Lifetime US3611917A (en) 1967-06-09 1968-06-03 Calender stack with swimming roll

Country Status (5)

Country Link
US (1) US3611917A (fi)
DE (1) DE1761572A1 (fi)
FI (1) FI51977B (fi)
FR (2) FR1567397A (fi)
GB (1) GB1219522A (fi)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4354431A (en) * 1979-08-14 1982-10-19 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Printing cylinder engagement pressure regulating system
US4357171A (en) * 1980-02-27 1982-11-02 Nurse William A Mill for cane sugar and related uses
US4736678A (en) * 1985-12-23 1988-04-12 Sulzer-Escher Wyss Gmbh Apparatus for selectively positioning rolls in a calender roll stack
US4890551A (en) * 1987-04-03 1990-01-02 Sulzer-Escher Wyss Gmbh Apparatus for guiding the rolls of an essentially vertical calender
US5662037A (en) * 1995-03-27 1997-09-02 Voith Sulzer Finishing Gmbh Calender for treating both sides of a web of paper
US5938895A (en) * 1998-04-02 1999-08-17 Valmet Corporation Calender having moisture profile control
WO2000058552A1 (en) * 1999-03-25 2000-10-05 Metso Paper Karlstad Aktiebolag Suspension arrangement for a press roll
WO2003046280A1 (en) * 2001-11-30 2003-06-05 Metso Paper Inc. Soft calender

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US891985A (en) * 1906-05-16 1908-06-30 George M Galt Pulp or paper machine.
US2970339A (en) * 1957-09-12 1961-02-07 John M Hausman Calender roll having adjustable crown
US2971457A (en) * 1958-08-13 1961-02-14 Farrel Birmingham Co Inc Calenders
US3023695A (en) * 1958-07-04 1962-03-06 Textilmaschinen Eduard Kusters Roll arrangements for subjecting strip or web material to pressure treatment
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
US3111081A (en) * 1962-01-18 1963-11-19 Beloit Iron Works Calender roll assembly
US3157110A (en) * 1962-12-13 1964-11-17 Dominion Eng Works Ltd Calender
US3340796A (en) * 1964-11-25 1967-09-12 Kimberly Clark Co Paper supercalender stack

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US891985A (en) * 1906-05-16 1908-06-30 George M Galt Pulp or paper machine.
US2970339A (en) * 1957-09-12 1961-02-07 John M Hausman Calender roll having adjustable crown
US3023695A (en) * 1958-07-04 1962-03-06 Textilmaschinen Eduard Kusters Roll arrangements for subjecting strip or web material to pressure treatment
US2971457A (en) * 1958-08-13 1961-02-14 Farrel Birmingham Co Inc Calenders
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
US3111081A (en) * 1962-01-18 1963-11-19 Beloit Iron Works Calender roll assembly
US3157110A (en) * 1962-12-13 1964-11-17 Dominion Eng Works Ltd Calender
US3340796A (en) * 1964-11-25 1967-09-12 Kimberly Clark Co Paper supercalender stack

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4354431A (en) * 1979-08-14 1982-10-19 M.A.N.-Roland Druckmaschinen Aktiengesellschaft Printing cylinder engagement pressure regulating system
US4357171A (en) * 1980-02-27 1982-11-02 Nurse William A Mill for cane sugar and related uses
US4736678A (en) * 1985-12-23 1988-04-12 Sulzer-Escher Wyss Gmbh Apparatus for selectively positioning rolls in a calender roll stack
US4890551A (en) * 1987-04-03 1990-01-02 Sulzer-Escher Wyss Gmbh Apparatus for guiding the rolls of an essentially vertical calender
US5662037A (en) * 1995-03-27 1997-09-02 Voith Sulzer Finishing Gmbh Calender for treating both sides of a web of paper
US5938895A (en) * 1998-04-02 1999-08-17 Valmet Corporation Calender having moisture profile control
WO2000058552A1 (en) * 1999-03-25 2000-10-05 Metso Paper Karlstad Aktiebolag Suspension arrangement for a press roll
US6764578B2 (en) 1999-03-25 2004-07-20 Metso Paper Karlstad Ab Suspension arrangement for a roll
US20040159416A1 (en) * 1999-03-25 2004-08-19 Metso Paper Karlstad Ab Suspension arrangement for a roll
US6846385B2 (en) 1999-03-25 2005-01-25 Metso Paper Karlstad Ab Suspension arrangement for a roll
WO2003046280A1 (en) * 2001-11-30 2003-06-05 Metso Paper Inc. Soft calender

Also Published As

Publication number Publication date
GB1219522A (en) 1971-01-20
DE1761572A1 (de) 1971-07-08
FR1567397A (fi) 1969-06-06
FR1570397A (fi) 1969-06-06
FI51977B (fi) 1977-01-31

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Legal Events

Date Code Title Description
AS Assignment

Owner name: VALMET-DOMINION INC., 795 FIRST AVE., LA CHINE, QU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:CANADIAN GENERAL ELECTRIC COMPANY LIMITED,;DOMINION ENGINEERING WORKS LIMITED;REEL/FRAME:004282/0775

Effective date: 19840416

Owner name: CANADIAN GENERAL ELECTRIC COMPANY LIMITED- COMPAGN

Free format text: CHANGE OF NAME;ASSIGNOR:DOMINION ENGINEERING WORKS LIMITED;REEL/FRAME:004301/0844

Effective date: 19840510

Owner name: VALMET-DOMINION INC., 795 1ST AVE., LACHINE, QUEBE

Free format text: MERGER;ASSIGNOR:CANADIAN GENERAL ELECTRIC COMPANY LIMITED- COMPANIE GENERAL ELECTRIQUE DU CANADA LIMITEE;REEL/FRAME:004282/0761

Effective date: 19840416