EP1746207A2 - Dispositif pour stabiliser une bande de papier durant sa fabrication - Google Patents

Dispositif pour stabiliser une bande de papier durant sa fabrication Download PDF

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Publication number
EP1746207A2
EP1746207A2 EP06425515A EP06425515A EP1746207A2 EP 1746207 A2 EP1746207 A2 EP 1746207A2 EP 06425515 A EP06425515 A EP 06425515A EP 06425515 A EP06425515 A EP 06425515A EP 1746207 A2 EP1746207 A2 EP 1746207A2
Authority
EP
European Patent Office
Prior art keywords
web
roller
movable element
lower face
wedge
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.)
Granted
Application number
EP06425515A
Other languages
German (de)
English (en)
Other versions
EP1746207A3 (fr
EP1746207B1 (fr
Inventor
Dario Bianchini
Luca Linari
Marco Cattani
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.)
Milltech Srl
Original Assignee
Milltech Srl
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 Milltech Srl filed Critical Milltech Srl
Publication of EP1746207A2 publication Critical patent/EP1746207A2/fr
Publication of EP1746207A3 publication Critical patent/EP1746207A3/fr
Application granted granted Critical
Publication of EP1746207B1 publication Critical patent/EP1746207B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/36—Guiding mechanisms
    • D21F1/38—Pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0063—Devices for threading a web tail through a paper-making machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/20—Avoiding or preventing undesirable effects
    • B65H2601/21—Dynamic air effects
    • B65H2601/211—Entrapping air in or under the material

Definitions

  • the present invention relates to a stabilizing apparatus for paper webs in the course of formation.
  • the present invention is suitable for use in plants for the production of tissue paper to maintain the webs stable during their advancement along the production lines.
  • the plants for the production of tissue paper are provided with a roller, so-called “yankee roller” over which the paper web in the course of formation is wound.
  • the web formed on the yankee roller is subsequently sent onto a transmission roller, so-called “pope roller”, to be fed to a spool for collecting the finished product.
  • stabilizing devices are provided between the yankee roller and the transmission roller to avoid the formation of air layers between the paper and the outer surface of the transmission roller.
  • the formation of air layers is due to an air flow carried by the paper web and consisting of fluid threads which develop in correspondence of the same web's faces.
  • the paper web runs at high speed (up to 2000 meters/min) with consequent production of a substantial air flow.
  • the transmission roller during its rotation thereof, carries a flow of air around the cylindrical surface thereof.
  • Stabilizing devices for paper webs are known to be made up of a body generally of wedge shape facing the lower surface of the web, that is, the surface which enters in contact with the transmission roller, and provided with an air-delivering means located upstream of the transmission roller.
  • the delivering means directs a jet of air against the lower surface of the web in order to stabilize the same web by counteracting the fluid thread being carried therealong.
  • the stabilizing devices utilize a jet of compressed air which tends to break the paper web.
  • the paper tissue results very thin and, accordingly, also breakable, especially if it is made to advance at high speeds; consequently, the jet of compressed air may tear the web.
  • the compressed air delivered towards the web generates an increase of paper powders usually present in the paper-production lines.
  • the specific technical object of the present invention is to propose a stabilizing apparatus for paper webs in the course of formation which does not exhibit the above mentioned drawbacks.
  • the object of the present invention is to provide a stibilizjng apparatus able to efficiently suppress the formation of air under the web without damaging the same web.
  • a further object of the present invention is to propose a stabilizing apparatus of simple and cost-effective structure and, capable, at the same time, of eliminating the cellulose powders carried by the web.
  • numeral 1 indicates on the whole a stabilizing apparatus for paper webs 2 in the course of formation, according to the present invention.
  • the apparatus 1 is advantageously applied in plants for the production of tissue paper, that is, paper for disposable products of any kind.
  • the plants are made up of a roller for driving out a paper web 2 in the course of formation.
  • the stabilizing apparatus 1 is housed upstream of the above cited roller 3 so as to eliminate any formation of air between the web 2 and the outer surface 3a of the same roller 3.
  • the stabilizing apparatus 1 comprises a movable element 4 disposed in correspondence of a lower face 2a of web 2.
  • the element 4 exhibits a wedge-like portion 5 having a substantially laminar conformation and presenting a leading edge 6 facing the web's advancement direction A.
  • the leading edge 6, having preferably a rounded profile, is disposed in correspondence of the lower face 2a of web 2 in order to intercept a first fluid thread F1 carried by the web 2.
  • the wedge-like portion 5 also exhibits a lower surface 7 adjacent to said leading edge 6 in order to intercept the first fluid thread F1 and divert it along a direction transverse to the feeding direction A (Fig. 1).
  • the lower surface 7 of the wedge-like portion 5 has a wavy development to define an aerodynamic profile able to divert the first fluid thread F1.
  • the wedge-like portion 5 also has a flat upper surface 8 opposite to the lower surface 7 and exhibiting a first end 8a associated with the leading edge 6, and a second end 8a opposite to the first.
  • the web 2 is pushed towards the upper surface 8 by sliding thereon while being driven into motion.
  • the second end 8b of the flat upper surface 8 is bent away from the lower face 2a of web 2 and in proximity (in use) of the external surface 3a of roller 2, thereby defining a section 9 for the passage of a second fluid thread F2 created by the rotation of roller 3.
  • the passage section 9 delimites, therefore, an expansion region able to create a further depression in correspondence of a portion of the external surface 3a of roller 3 in contact with the lower face 2a of web 2.
  • the movable element 4 comprises a support arm 10 having a substantially elongated shape and exhibiting a first end 10a associated, at the bottom, with the wedge-like portion 5, and a second end 10b opposite to the first end 10a.
  • the first end 10a is substantially U-shaped wherein a concave region facing opposite to wedge-like portion 5 is defined.
  • the first end 10a of the arm 10 has a raker 11 shaped like a lamina ad abutting against the external surface 3a of the transmission roller 3.
  • the raker 11 is in contact with the roller 3 to slide onto the external surface and to intercept the second fluid thread F2.
  • the second fluid thread F2 is mostly diverted by the raker 11 and made to flow to the concave region of the first end 10a to be drawn away from the web 2.
  • the second end 10b of arm 10 is engaged with a linear actuator 12 able to drive the movable element 4 between an operating position, in which it is moved close to the paper web 2 (Fig. 1), and an inoperative position in which it is moved away from the web 2 (Fig. 2).
  • the movable element 4 can be moved away from the web to allow an operator to manually intervening on the same web.
  • the linear actuator 12 preferably exhibits a pneumatic piston.
  • the actuator 12 may consist of any mechanical means known in the art for driving the movable element 4.
  • the apparatus 1 may also be provided with suction means 13 to be moved close to the movable element 4 in correspondence of the lower face 2a of web 2.
  • the means 13 exhibit a first suction mouth 13a facing the wedge-like portion 5 in order to aspirate the cited fluid threads F1 and F2 being diverted by the movable element 4.
  • the suction means 13 also exhibit a second suction mouth 13b facing a yankee roller (not shown in the figures) generally disposed upstream of the movable element 5.
  • the invention overcomes the problems of the prior art and reaches the envisaged objects.
  • the wedge-like portion 5 allows eliminating the fluid thread carried by the web 2 without acting directly on the same web 2. Consequently, any damaging of the paper web 2 is avoided.
  • wedgte-like portion 5 made up of a suitably shaped lamina, results of very simple construction and limited cost.
  • a further advantage is provided by the effect of the means 13 which make it possible to eliminate any cellulose powder present in the plant by aspiring the first and second fluid threads F1 and F2.

Landscapes

  • Paper (AREA)
  • Replacement Of Web Rolls (AREA)
  • Sanitary Thin Papers (AREA)
EP20060425515 2005-07-22 2006-07-21 Dispositif pour stabiliser une bande de papier durant sa fabrication Ceased EP1746207B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000161A ITFI20050161A1 (it) 2005-07-22 2005-07-22 Dispositivo di stabilizzazione per nastri di carta in formazione

Publications (3)

Publication Number Publication Date
EP1746207A2 true EP1746207A2 (fr) 2007-01-24
EP1746207A3 EP1746207A3 (fr) 2007-07-04
EP1746207B1 EP1746207B1 (fr) 2015-05-13

Family

ID=37309511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060425515 Ceased EP1746207B1 (fr) 2005-07-22 2006-07-21 Dispositif pour stabiliser une bande de papier durant sa fabrication

Country Status (4)

Country Link
US (1) US20070018028A1 (fr)
EP (1) EP1746207B1 (fr)
CA (1) CA2552978A1 (fr)
IT (1) ITFI20050161A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITFI20100193A1 (it) * 2010-09-16 2012-03-17 Milltech S R L Gruppo cassa aspirante
EP2978700A4 (fr) * 2013-03-27 2017-12-06 Valmet Aktiebolag Enrouleur et procédé pour enrouler une bande de papier dans l'extrémité sèche d'une machine à papier

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9056742B2 (en) * 2011-09-19 2015-06-16 The Procter & Gamble Company Process for initiating a web winding process

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6039842A (en) * 1996-05-24 2000-03-21 Lau; Jark C. Method and apparatus for stabilizing a moving low-strength sheet
WO2001014233A1 (fr) * 1999-08-24 2001-03-01 Kimberly-Clark Worldwide, Inc. Procede et dispositif servant a ameliorer la stabilite de bandes en mouvement
EP1101863A2 (fr) * 1999-11-18 2001-05-23 Andritz AG Procédé et dispositif pour enlever de la poussière d'une bande de papier en défilement
US6565711B1 (en) * 2000-08-05 2003-05-20 Kleissler Jr Edwin A Method for controlling dust on paper machinery and the like

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3739338C2 (de) * 1987-11-20 1995-09-07 Voith Gmbh J M Luftleitkasten zum Stabilisieren des Laufs einer Warenbahn, insbesondere einer Papierbahn
GB0030682D0 (en) * 2000-12-15 2001-01-31 Astenjohnson Inc Suction assisted skimmer blade

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6039842A (en) * 1996-05-24 2000-03-21 Lau; Jark C. Method and apparatus for stabilizing a moving low-strength sheet
WO2001014233A1 (fr) * 1999-08-24 2001-03-01 Kimberly-Clark Worldwide, Inc. Procede et dispositif servant a ameliorer la stabilite de bandes en mouvement
EP1101863A2 (fr) * 1999-11-18 2001-05-23 Andritz AG Procédé et dispositif pour enlever de la poussière d'une bande de papier en défilement
US6565711B1 (en) * 2000-08-05 2003-05-20 Kleissler Jr Edwin A Method for controlling dust on paper machinery and the like

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITFI20100193A1 (it) * 2010-09-16 2012-03-17 Milltech S R L Gruppo cassa aspirante
EP2978700A4 (fr) * 2013-03-27 2017-12-06 Valmet Aktiebolag Enrouleur et procédé pour enrouler une bande de papier dans l'extrémité sèche d'une machine à papier

Also Published As

Publication number Publication date
EP1746207A3 (fr) 2007-07-04
CA2552978A1 (fr) 2007-01-22
US20070018028A1 (en) 2007-01-25
EP1746207B1 (fr) 2015-05-13
ITFI20050161A1 (it) 2007-01-23

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