US3191312A - Method of uniformly moistening paper and like hygroscopic web material - Google Patents

Method of uniformly moistening paper and like hygroscopic web material Download PDF

Info

Publication number
US3191312A
US3191312A US187991A US18799162A US3191312A US 3191312 A US3191312 A US 3191312A US 187991 A US187991 A US 187991A US 18799162 A US18799162 A US 18799162A US 3191312 A US3191312 A US 3191312A
Authority
US
United States
Prior art keywords
web
rolls
web material
moisture
hygroscopic
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
US187991A
Other languages
English (en)
Inventor
Allander Claes
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.)
Svenska Flaktfabriken AB
Original Assignee
Svenska Flaktfabriken 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 Svenska Flaktfabriken AB filed Critical Svenska Flaktfabriken AB
Application granted granted Critical
Publication of US3191312A publication Critical patent/US3191312A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
    • D21H5/0012—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating by bringing paper into contact with an excess of fluids, the paper carrying away only a part of the fluid material, e.g. by passing through liquids, gases or vapours
    • D21H5/002—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating by bringing paper into contact with an excess of fluids, the paper carrying away only a part of the fluid material, e.g. by passing through liquids, gases or vapours the paper being at least partly surrounded by treating medium on both sides
    • D21H5/0022—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating by bringing paper into contact with an excess of fluids, the paper carrying away only a part of the fluid material, e.g. by passing through liquids, gases or vapours the paper being at least partly surrounded by treating medium on both sides treating medium being a gas or vapour
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G7/00—Damping devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/42—Paper being at least partly surrounded by the material on both sides
    • D21H23/44—Treatment with a gas or vapour

Definitions

  • the present invention relates to a method for conditioning paper and like hygroscopic web material.
  • a method for conditioning paper and like hygroscopic web material In View of the hygroscopic properties of such material, it is necessary to complete the manufacturing process by conditioning in order to bring the moisture ratio into equilibrium with normal storage atmosphere. Special types of paper are, moreover, subjected to such conditioning treatment in view of stability requirements for printing and the like.
  • the conditioning was carried out in several ways, the moisture ratio being determined, for example, by spraying finely distributed water through nozzles onto the web or by blowing steam against the web while at the same time passing the web over cooled rolls.
  • the web is passed through a closed space and subjected therein to the eliect of moist air with suitable controlled relative moisture.
  • the object of this invention is characterized in that the web material is advanced in a plurality of back-and-forth passes between a number of rotary cooled rolls, that the web material during its passage about the rolls is pressed against the same by means of one or a plurality of endless felt webs which also are directed about the rolls, and that in the said space a moisture saturated atmosphere is maintained, all of the said steps having the object of imparting to the said web material during its passage over the said cooled rolls as uniform a temperature as possible and a uniformly distributed moisture.
  • the conditioning may be carried out in two or more steps, in that the web material is passed through a treatment chamber divided into sections, and that in the said sections a relative differentiated atmospheric condition is maintained.
  • the drawing 1 designates a closed treatment chamber adapted for conditioning web material.
  • the said chamber comprises heat insulated walls, floor and ceiling ice which lie closely adjacent to a plurality of rotary cooled rolls 2 to advance the web material 3 in back-and-forth passes therebetween, so that both surfaces of the web material are alternately in Contact with the cylinder surface of the cooled rolls.
  • the chamber 1 has, of course, limited openings as at 11, to provide entrance and egress of the web 3, while limiting, as far as practicable the entrance of the outside air or egress of conditioned air from the interior of the chamber.
  • the web is pressed against the same by two endless felt webs 4a and 4b which together with the web material are directed about the cooled rolls and are further guided by a number of guide rolls Sa and 5b.
  • a moisture saturated atmosphere with a suitable temperature adjusted to the material in question is maintained by air conditioning and circulating means 1t).
  • air conditioning and circulating means 1t When contacting the said cooled rolls the web material absorbs on the roll surface moisture precipitated from the said atmosphere whichdue to the uniform contact ensured by the said felt websis distributed uniformly in the web material.
  • the hygroscopic felt webs absorb even moisture from the atmosphere, which moisture is also transferred to the web material during its passage over the cooled rolls.
  • the number of cooled rolls and the length of the felt webs may be adjusted in each individual case to the capacity desired.
  • the shape and construction of the said treatment chamber as well as the location of the cooled rolls and of the guide rolls may, of course, be varied in many ways within the scope of the inventive idea. In certain cases it may be preferable to divide the treatment chamber by partitionsinto a plurality of separate sections through which the web material is caused to pass and wherein relative differentiated atmospheric conditions are maintained.
  • the method of uniformly moistening a continuous web of paper or similar hygroscopic material comprising the following steps: providing a closed treatment chamber having disposed therein a plurality of spaced, rotatable, cooled rolls, said treatment chamber having walls lying closely adjacent to said rolls, advancing the web in a number of back-and-forth passes over said rolls, maintaining within said chamber a controlled atmosphere of relatively high humidity and regulated temperature, pressing an endless felt against the web alternately on the exterior of said web as it passes over said rolls, and concurrently therewith maintaining said felt web wholly Within said chamber whereby said web has a relatively uniform moisture condition throughout its extent.

Landscapes

  • Paper (AREA)
  • Drying Of Solid Materials (AREA)
US187991A 1961-04-17 1962-04-16 Method of uniformly moistening paper and like hygroscopic web material Expired - Lifetime US3191312A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE399961 1961-04-17

Publications (1)

Publication Number Publication Date
US3191312A true US3191312A (en) 1965-06-29

Family

ID=20263313

Family Applications (1)

Application Number Title Priority Date Filing Date
US187991A Expired - Lifetime US3191312A (en) 1961-04-17 1962-04-16 Method of uniformly moistening paper and like hygroscopic web material

Country Status (3)

Country Link
US (1) US3191312A (enrdf_load_stackoverflow)
FI (1) FI42267B (enrdf_load_stackoverflow)
GB (1) GB970676A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753298A (en) * 1971-12-17 1973-08-21 Beloit Corp Web dryer
US3925906A (en) * 1972-08-14 1975-12-16 Beloit Corp Hot wire drying
FR2393616A1 (fr) * 1977-06-06 1979-01-05 Bachofen & Meier Maschf Procede pour l'humidification, l'impregnation ou l'amelioration d'une bande de papier, de carton, de feuilles et installation pour l'execution de ce procede
DE4018882A1 (de) * 1990-06-13 1991-12-19 Voith Gmbh J M Trockenpartie fuer eine papiermaschine
US5291666A (en) * 1993-04-23 1994-03-08 International Paper Company Apparatus for drying roll material
US5588224A (en) * 1995-06-07 1996-12-31 Egs Americas, Inc. Chill roll assembly
US20060254735A1 (en) * 2003-03-31 2006-11-16 Katsumasa Ono Processes for producing cast coated papers and apparatus therefor
CN105239441A (zh) * 2015-11-02 2016-01-13 江苏利特尔绿色包装股份有限公司 一种纸张回湿三辊加湿传递装置
SE2330560A1 (en) * 2023-12-15 2025-06-16 Stora Enso Oyj A method for producing a microfibrillated cellulose web

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1293565B (de) * 1964-12-11 1969-04-24 Wiessner Ges Fuer Raumluftgest Vorrichtung zum Konditionieren von Papierbahnen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2337163A (en) * 1939-06-22 1943-12-21 Milne Samuel Hird Apparatus for conditioning paper
US2344686A (en) * 1941-06-28 1944-03-21 Paper Patents Co Paper drier and method
GB564356A (en) * 1942-12-19 1944-09-25 Hall & Kay Ltd An improved method of, and apparatus for, drying, and if desired also conditioning, paper in the continuous manufacture of same
US2661669A (en) * 1951-02-14 1953-12-08 Beckett Paper Company Process and apparatus for avoiding curl in machine-made paper
US3079699A (en) * 1958-10-27 1963-03-05 American Viscose Corp Web humidifying method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2337163A (en) * 1939-06-22 1943-12-21 Milne Samuel Hird Apparatus for conditioning paper
US2344686A (en) * 1941-06-28 1944-03-21 Paper Patents Co Paper drier and method
GB564356A (en) * 1942-12-19 1944-09-25 Hall & Kay Ltd An improved method of, and apparatus for, drying, and if desired also conditioning, paper in the continuous manufacture of same
US2661669A (en) * 1951-02-14 1953-12-08 Beckett Paper Company Process and apparatus for avoiding curl in machine-made paper
US3079699A (en) * 1958-10-27 1963-03-05 American Viscose Corp Web humidifying method

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3753298A (en) * 1971-12-17 1973-08-21 Beloit Corp Web dryer
US3925906A (en) * 1972-08-14 1975-12-16 Beloit Corp Hot wire drying
FR2393616A1 (fr) * 1977-06-06 1979-01-05 Bachofen & Meier Maschf Procede pour l'humidification, l'impregnation ou l'amelioration d'une bande de papier, de carton, de feuilles et installation pour l'execution de ce procede
DE4018882A1 (de) * 1990-06-13 1991-12-19 Voith Gmbh J M Trockenpartie fuer eine papiermaschine
US5291666A (en) * 1993-04-23 1994-03-08 International Paper Company Apparatus for drying roll material
US5588224A (en) * 1995-06-07 1996-12-31 Egs Americas, Inc. Chill roll assembly
US20060254735A1 (en) * 2003-03-31 2006-11-16 Katsumasa Ono Processes for producing cast coated papers and apparatus therefor
US7699960B2 (en) * 2003-03-31 2010-04-20 Nippon Paper Industries Co., Ltd. Processes and apparatus for producing cast coated papers
CN105239441A (zh) * 2015-11-02 2016-01-13 江苏利特尔绿色包装股份有限公司 一种纸张回湿三辊加湿传递装置
SE2330560A1 (en) * 2023-12-15 2025-06-16 Stora Enso Oyj A method for producing a microfibrillated cellulose web
WO2025126002A1 (en) * 2023-12-15 2025-06-19 Stora Enso Oyj A method for producing a microfibrillated cellulose web

Also Published As

Publication number Publication date
FI42267B (enrdf_load_stackoverflow) 1970-03-02
GB970676A (en) 1964-09-23

Similar Documents

Publication Publication Date Title
US3447247A (en) Method and equipment for drying web material
US3079699A (en) Web humidifying method
US3191312A (en) Method of uniformly moistening paper and like hygroscopic web material
US4474643A (en) Method for controlling the moisture content of a fiber web and apparatus for accomplishing the method and a paper making machine for accomplishing the method and a paper making machine with an apparatus for accomplishing the method
US3089252A (en) Web moisture profile control for paper machine
SE7604058L (sv) Forfarande och anordning for behandling av en till det hygroskopiska omradet torkad bana, i synnerhet en pappersbana
US3110575A (en) Porous belt drying apparatus
US4291472A (en) Drying apparatus for aqueous coated articles and method
US3838000A (en) Method and device for moisturizing a web,including an air header with perforated walls
US1714261A (en) Paper-converting machinery
US2344686A (en) Paper drier and method
US3335499A (en) Method for humidifying boards of wood fibre or similar material
US2323918A (en) Drying fiberboard and the like
US2281496A (en) Air drier for paper
US2365352A (en) Method and apparatus for drying and cooling roofing and similar material
US2718065A (en) Humidifying apparatus
US2837830A (en) Method and apparatus for drying flexible sheet material
DE3174068D1 (en) Apparatus for ventilating cylinder pockets in a cylinder dryer
US2061976A (en) Process and apparatus for the drying of travelling webs
US2362309A (en) Moistening apparatus
US3318017A (en) Heat treating method and apparatus
US3099541A (en) Treating veneers
US1656853A (en) Paper machinp
US3320676A (en) Method and apparatus for humidifying hydrophilic materials
US2264542A (en) Finishing and conditioning of paper