US2081945A - Means and method of drying coated flexible webs - Google Patents

Means and method of drying coated flexible webs Download PDF

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Publication number
US2081945A
US2081945A US51740A US5174035A US2081945A US 2081945 A US2081945 A US 2081945A US 51740 A US51740 A US 51740A US 5174035 A US5174035 A US 5174035A US 2081945 A US2081945 A US 2081945A
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US
United States
Prior art keywords
web
coating
drum
apertures
air
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
US51740A
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English (en)
Inventor
Peter J Massey
William F Thiele
Bert F Raprager
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.)
Consolidated Water Power and Paper Co
Original Assignee
Consolidated Water Power and Paper Co
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 Consolidated Water Power and Paper Co filed Critical Consolidated Water Power and Paper Co
Priority to US51740A priority Critical patent/US2081945A/en
Priority to DEM133943D priority patent/DE659942C/de
Priority to FR804490D priority patent/FR804490A/fr
Priority to GB9660/36A priority patent/GB463291A/en
Application granted granted Critical
Publication of US2081945A publication Critical patent/US2081945A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
    • F26B13/103—Supporting materials without tension, e.g. on or between foraminous belts with mechanical supporting means, e.g. belts, rollers, and fluid impingement arrangement having a displacing effect on the materials
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/24—Arrangements of devices using drying processes not involving heating
    • F26B13/28—Arrangements of devices using drying processes not involving heating for applying pressure; for brushing; for wiping

Definitions

  • This invention relates to improvements in a method and means for drying wet webs, and refers specifically to a method and means vfor drying a freshly coated flexible web by passing the 5 same over a series of heated drying drums, the freshly coated surface being subjected to blasts of heated air or other fluid so directed as to provide an insulating air fllm or cushion between the coated surface and the surfaces of the drums so that the coated surface will not be disrupted or marred.
  • Drum driers have heretofore been deemed impractical or at best unsatisfactory since the contact between the drum surface and freshly coated web surface resulted in disflgurement and marring of the coated surface. Consequently, for the drying of coated webs where the smoothness and flneness of the coating is of importance,
  • drum driers with their other many advantageous features have been out of the question.
  • Our present invention contemplates a method and means whereby a freshly coated web may be passed over drum driers immediately after the coating operation without injuring the freshly applied coating. ⁇
  • This phenomenon is accom- 5 plshed by first subjecting the coated web to blasts of heated air under pressure to preliminarily set the coating and then passing the web over the initial rolls or drums of the drier while simultaneously directing air blasts between the web and the drum surface, entrapping the air therebetween so as to form an insulating air lm or cushion between the coated surface and the drum surface. In this manner actual physi- 55 cal contact between the drum surface and the coating is substantially prevented or at least harmful contact is eliminated.
  • the air blasts are so directed with respect to the web that a transverse component of force is exerted upon the web in opposite directions thereby tending to place the web under slight transverse tension suflicient to eliminate the undesirable roping effect.
  • Fig. l is a diagrammatic side elevational view of suitable means for carrying out our invention.
  • Fig. 2 is an enlarged fragmentary side elevation illustrating the bellying of the web during its passage over the drier drums.
  • Fig. 3 is a fragmentary transverse sectional view illustrating the bulging of the web, during its passage over the drum due to the entrapped air.
  • Fig. 4 is a transverse sectional view taken on line 4 4 of Fig. 1.
  • Fig. 5 is a top plan View of one end of the ai discharging chests
  • l and 2 indicate oppositely disposed co-acting coating rolls which are adapted to transfer amobile coating material from their respective surfaces to the opposite faces of a continuously passing flexible web 3.
  • our invention will be described in conjunction with a coating device utilized for coating both surfaces of a web of paper, the paper to be used for printing purposes. It is to be understood, of course, that our invention is not to be limited to this precise application-since it is equally applicable tc the drying of substantially any type of flexible web carrying a surface coating, on one or both surfaces, which coating is susceptible of being dried or set by heat.
  • the coating devicc shown diagrammatically in Fig. 1 is intended to illustrate a coating machine similar to that described in our co-pending application, Serial No. 40,150 flied Sept. ⁇ 11, 1935.
  • a mobile coating material 4 is carried between two juxtaposed gate rolls 5 and E.
  • a controlled quantity of the coating material 4 may be carried upon the exterior surface of the rolls 6 and may be transferred to a series of osculatin'g distributing rolls l.
  • the last roll of the series in both the upper and lower tiers is adapted to contact the coating rolls I and 2' and transfer to the surface thereof a smooth, uniformly distributed iilm of coating material.
  • this nlm is subsequently transferred from the surfaces of the'rolls I and 2 to the opposite faces of a continuously passing Apaper web 3.
  • the finished coating be smooth and uniformly distributed over the surface of the paper.
  • such a surface may be deposited upon the web 3. Therefore, it is essential that after the web 3 passes from between the rolls I and 2, extreme care be taken that the coating be undisturbed particularly While said coating is yet wet and unset.
  • the coating on web 3 still contains a considerable quantity of moisture and although immobile in the sense that it will not flow, the coating is still suiiiciently pliable or mobile as to be susceptible to scratches and disgurement by contact with solid bodies.
  • chests 8 and 9 preferably extend transversely across the entire width ofthe web 3 and the respective opposed surfaces of said chests are spaced from the-web. Said opposed surfaces of the chests may be provided with a series of apertures I whichopen into the interior of the chests. 'I'he chests 8 and 9 may form portions of a larger supply or equalizing chest II which may be connected to a source of heated air or fluid under pressure.
  • the web 3 In view of the fact that the web 3 is adapted to travel in a continuous manner, said web must be maintained under longitudinal tension. Moreover, in order to thoroughly dry the coating mate-- rial said web is to be passed over a-series of drum driers. When the coating material is applied to the web a quantity of the moisture carried by the coating material permeates the-web thereby rendering said web less rigid or stiff. Due to the fact that the web is under tension and is passing over a roll surface, the web when traveling between the chests 8 and 9 would tend to rope", that is, wrinkle longitudinally. 'I'his roping is due primarily to the longitudinal tension of the web and also the fact that in passing over ⁇ the fectively prevents longitudinal wrinkling of the web. As clearly illustrated in Fig.
  • the apertures III adjacent the longitudinal edges of the web are so inclined as to discharge the air at an angle to the web surface.
  • the apertures I0 adjacent the opposite longitudinal edge of the web discharge the air at angles to the web which are oppositely inclined to those upon the other end.
  • the apertures I0 at the center of the chests 8 and 9 discharge air blasts at right angles to the surfaces of the web and therefore exert no component in either direction.
  • the apertures III in addition to being inclined in a transverse direction with respect to the web are all, including the central apertures, inclined in a longitudinal direction so as to exert a component of force which acts in the direction of motion of the web. Therefore, the web 3 after leaving rolls I and 2 and while the same is between the chests 8 and 9, is in both transverse and longitudinal tension thereby maintaining the web surface flat and preventing distortion of the coating films due to wrinkling.
  • a conduit I3 may also be connected to the chest II, said conduit being arcuate in shape and following the contour of roll I2. That face of conduit ls which-1s adjacent rou Iz 1s also provided with apertures I0 which are inclined in the same manner as those provided in the chests 8 and 9.
  • said web 3 passes from between the chests 8 and 9, said web is trained around roll I2 and is thereafter passed over the surface of drying drum I4 which may comprise the rst drum of a series of driers, the remaining drums not being shown.
  • the portion of the chest 9 adjacent roll I2 terminates in a more or less pointed edge.
  • 'I'he extreme edge of the chest substantially at said point is provided with a transverse row of apertures I which direct blasts of air into the nip between the lower surface of the web and the surface of roll I2.
  • Fig. 5 which clearly shows the apertures I5.
  • a lm or cushion or air or other fluid be interposed between the surface of the web and the surface of the roll I2 so that injurious'contact between the coated surface of the web and said roll will be prevented.
  • said fluid is directed between these opposed surfaces. 'I'he web is therefore slightly raised from the surface of the roll I2 during its passage therearound, being carried upon the air discharged from the apertures I5.
  • the apertures I8 are so arranged as to size that a greater quantity of air is delivered at the central portion of the web than is discharged by said apertures adjacent the longitudinal edges of the web.
  • the end of the conduit I3 is so constructed as to direct air or fluid from the endmost row of apertures I9 between the web and the surface of the rst drier I4.
  • 'I'he apertures I9 extend transversely across the conduit I3 and are con- 'structed with respect to size and angular inclination similar to apertures I5.
  • the air or uid discharged from apertures I9 tends to belly web 3 in the manner shown in Fig. 3 thereby providing a trapped body of iluid between the web and drum I4 which serve as a cushion or insulating medium for said web during its passage around drum I4.
  • the air or other iiuid discharged through apertures I0, I5 and I9 may be heated or said air may be at normal temperature.
  • the air may be impregnated with adesired agent which may produce a chemical or physical effect upon the coating.
  • adesired agent which may produce a chemical or physical effect upon the coating.
  • a method of drying a coated flexible web which comprises, continuously passing a freshly.
  • coated web forwardly over a drum and discharging uid under pressure between the web and drum surface so as to provide a fluid cushion between the web and drum surface, a greater quantity of fluid being discharged adjacent the longitudinal center of the web than that discharged adjacent its edges so as to belly the web away from the drum and entrap the fluid between the web and the drum surface.
  • a method of drying a coated exible web which comprises, continuously passing a freshly coated web forwardly over a. heated drum and discharging fluid under pressure between the web and drum surface so as to provide a fluid cushion between the web and drum surface, a greater.
  • a method of drying the coated area of a flexible web comprising, continuously passing a web forwardly having a wet mobile substance upon its surface, discharging heated fluid under pressure into contact with the wet areas of said surface to dry said substance, said fluid contacting the web in such a manner as to place the web under transverse tension, passing said web over a drum and discharging heated fluid under pressure between the web and drum surface so as to provide a uid cushion between the web and drum surface, a greater quantity of fluidbeing discharged adjacent the longitudinal center of the web than that discharged adjacent its edges so as to belly the web away from the drum and entrap the uid

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US51740A 1935-11-27 1935-11-27 Means and method of drying coated flexible webs Expired - Lifetime US2081945A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US51740A US2081945A (en) 1935-11-27 1935-11-27 Means and method of drying coated flexible webs
DEM133943D DE659942C (de) 1935-11-27 1936-03-19 Verfahren zum Trocknen einer mit UEberzug versehenen Papierbahn o. dgl.
FR804490D FR804490A (fr) 1935-11-27 1936-03-20 Procédé et dispositif pour le séchage de bandes flexibles enduites
GB9660/36A GB463291A (en) 1935-11-27 1936-04-01 Means and method of drying coated flexible webs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US51740A US2081945A (en) 1935-11-27 1935-11-27 Means and method of drying coated flexible webs

Publications (1)

Publication Number Publication Date
US2081945A true US2081945A (en) 1937-06-01

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Family Applications (1)

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US51740A Expired - Lifetime US2081945A (en) 1935-11-27 1935-11-27 Means and method of drying coated flexible webs

Country Status (4)

Country Link
US (1) US2081945A (fr)
DE (1) DE659942C (fr)
FR (1) FR804490A (fr)
GB (1) GB463291A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462380A (en) * 1946-01-05 1949-02-22 Andrews & Goodrich Inc Method and apparatus for drying web material
US2492974A (en) * 1946-04-30 1950-01-03 Dungler Julien Nozzle member used for the drying of textile and other materials
US2547884A (en) * 1944-07-20 1951-04-03 Jens A Paasche Spray coating apparatus
US2848820A (en) * 1952-10-08 1958-08-26 Svenska Flaektfabriken Ab Method and apparatus for supporting and conveying web-like material
US3061940A (en) * 1958-08-22 1962-11-06 Du Pont Method and apparatus for heat transfer
US3097933A (en) * 1958-07-07 1963-07-16 Kimberly Clark Co Papermaking drying machine
US3102006A (en) * 1958-11-14 1963-08-27 Samcoe Holding Corp Method and apparatus for treating web materials
US3293775A (en) * 1964-06-22 1966-12-27 Itek Corp Data processing apparatus
US3496648A (en) * 1968-03-18 1970-02-24 Offen & Co Inc B Web damping nozzle system
US4186496A (en) * 1977-03-15 1980-02-05 Dominion Engineering Works Limited Web drier section
US4513517A (en) * 1980-05-13 1985-04-30 Valmet Oy Cylinder dryer for paper machine or equivalent
US20050283994A1 (en) * 2004-06-28 2005-12-29 Wilhelm Mausser Device for continuous drying of a pulp web

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039536B (de) * 1955-05-07 1958-09-25 Maschf Augsburg Nuernberg Ag Tiefdruckrotationsmaschine
DE1629003B1 (de) * 1965-12-18 1970-04-30 Friedrich Haas Gmbh Maschf Vorrichtung zum Behandeln, insbesondere Trocknen, von Waren
DE3220076C2 (de) * 1982-05-28 1987-01-22 J.M. Voith Gmbh, 7920 Heidenheim Luftblaskasten für die Trockenpartie einer Papiermaschine

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547884A (en) * 1944-07-20 1951-04-03 Jens A Paasche Spray coating apparatus
US2462380A (en) * 1946-01-05 1949-02-22 Andrews & Goodrich Inc Method and apparatus for drying web material
US2492974A (en) * 1946-04-30 1950-01-03 Dungler Julien Nozzle member used for the drying of textile and other materials
US2848820A (en) * 1952-10-08 1958-08-26 Svenska Flaektfabriken Ab Method and apparatus for supporting and conveying web-like material
US3097933A (en) * 1958-07-07 1963-07-16 Kimberly Clark Co Papermaking drying machine
US3061940A (en) * 1958-08-22 1962-11-06 Du Pont Method and apparatus for heat transfer
US3102006A (en) * 1958-11-14 1963-08-27 Samcoe Holding Corp Method and apparatus for treating web materials
US3293775A (en) * 1964-06-22 1966-12-27 Itek Corp Data processing apparatus
US3496648A (en) * 1968-03-18 1970-02-24 Offen & Co Inc B Web damping nozzle system
US4186496A (en) * 1977-03-15 1980-02-05 Dominion Engineering Works Limited Web drier section
US4513517A (en) * 1980-05-13 1985-04-30 Valmet Oy Cylinder dryer for paper machine or equivalent
US20050283994A1 (en) * 2004-06-28 2005-12-29 Wilhelm Mausser Device for continuous drying of a pulp web
US7690131B2 (en) * 2004-06-28 2010-04-06 Andritz Ag Device for continuous drying of a pulp web

Also Published As

Publication number Publication date
DE659942C (de) 1938-05-13
GB463291A (en) 1937-03-25
FR804490A (fr) 1936-10-24

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