US3863360A - Sheet drying apparatus - Google Patents

Sheet drying apparatus Download PDF

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Publication number
US3863360A
US3863360A US300992A US30099272A US3863360A US 3863360 A US3863360 A US 3863360A US 300992 A US300992 A US 300992A US 30099272 A US30099272 A US 30099272A US 3863360 A US3863360 A US 3863360A
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United States
Prior art keywords
chamber
sheet
rolls
path
discharge end
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
US300992A
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English (en)
Inventor
Emile Stievenari
Jurgen Muller
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.)
Agfa Gevaert AG
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Agfa Gevaert AG
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Publication date
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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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/10—Temperature; Pressure

Definitions

  • the upper wall of the drying 3,548,5l2 12/l970 Smoot 34/151 hamber and the corresponding nozzle can be lifted 3,557,469 Edgmgton off the lower wall to afford access to the interior of 3,606,689 9/1971 MalSud et 34/155 the chamber 3,707,777 l/l973 Geyken et al 34/l55 I 3,718,983 3/1973 Crowell 34/155 15 Claims, 2 Drawing Figures 1 Ba 15d 15 13 13b 1 snaa'r nnvmc APPARATUS BACKGROUND OF THE INVENTION
  • the present invention relates to apparatus for the drying of sheet-like materials, such as carriers of exposed and developed photosensitive layers. More particularly.
  • the invention relates to drying apparatus of the type wherein the sheet-like material to be dried is caused to advance along a predetermined path extending through a drying chamber to be contacted therein by a gaseous drying fluid. Still more particularly. the invention relates to improvements in sheet drying apparatus wherein the material to be dried is transported by two sets of advancing rolls located upstream and downstream of the drying chamber and wherein the gaseous drying fluid is admitted by way of nozzles located between the front and rear advancing rolls.
  • the orifices of the nozzles are located at a considerable distance from the path along which the sheet-like material advances through the drying chamber.
  • the drying chamber is provided with a relatively small single outlet for spent drying fluid.
  • the nozzles are mounted substantially midway between the front and rear advancing rolls.
  • the rate of admission of drying fluid is such that the pressure in the drying chambers rises above atmospheric pressure. It was found that such apparatus cause the generation of a relatively slow laminar flow of gaseous fluid along both sides of a sheet which is being transported through the drying chamber.
  • Such layers of gaseous fluid at both sides of the advancing sheet allow for a relatively slow drying because they prevent freshly admitted fluid from coming into contact with the sheet.
  • An object of the invention is to provide a novel and improved drying apparatus wherein the leader of a freshly introduced sheet to be dried automatically finds its way into the nip of the rear advancing rolls without the provision of any guide means in the interior of the drying chamber and irrespective of the stiffness or lack of stiffness of the sheet material.
  • Another object of the invention is to provide a drying apparatus which prevents the development of laminar flow of gaseous drying fluid along one or both sides of sheets which are caused to advance through the drying chamber.
  • a further object of the invention is to provide the drying apparatus with novel and improved means for insuring continuous contact between fresh gaseous drying fluid and sheet material while the material advances through the drying chamber.
  • Still another object of the invention is to provide novel and improved means for admitting a gaseous drying fluid into the chamber of the drying apparatus.
  • An additional object of the invention is to provide a drying apparatus which can be readily opened to ailow for inspection and cleaning of the interior of the drying chamber.
  • the improved drying apparatus comprises a hollow drying chamber having a preferably funnel-shaped inlet end and a discharge end, first rotary sheet advancing means adjacent to the inlet end (and preferably comprising two rolls at least one of which is driven to rotate the other roll. either directly or by way of sheet-like material therebetween).
  • a source of gaseous drying fluid and first and second nozzle means provided on the drying chamber adjacent to the inlet end at the opposite sides of the path for sheet-like material and being connected with the source of gaseous drying fluid.
  • the nozzle means are preferably mirror symmetrical to each other with reference to the plane of the path and have orifices closely adjacent to the path and arranged to discharge streams of gaseous drying fluid against the respective sides of sheet-like material in the chamber, preferably at least substantially at right angles to the direction of travel of sheet-like material.
  • the thus admitted streams of drying fluid flow along the sheet-like material in the chamber and are allowed to escape by way of the discharge end whose cross-sectional area is preferably large enough to allow for substantially unobstructed escape of gaseous fluid.
  • the interior of the chamber is provided with means for creating turbulence in the admitted air streams to thus prevent the development of laminar flow of gaseous fluid at one or both sides of the path.
  • FIG. 1 is a fragmentary longitudinal vertical sectional view of a drying apparatus which embodies the invention.
  • FIG. 2 is a view as seen in the direction of arrow A in FIG. 1.
  • the sheet drying apparatus comprises a housing including a lower section 1 and an upper section 3 which is movable relative to the lower section about the axis of a horizontal pivot member 2.
  • the sections 1 and 3 respectively support the lower and upper portions or walls 12, I3 of a hollow horizontal drying chamber which walls are respectively provided with gas-admitting nozzles 16 and IS.
  • the lefbhand portion of the lower housing section 1, as viewed in FIG. 1, is provided with a vertical slot la which receives the shaft 4 of a lower advancing roll 6 and the shaft 5 of an upper advancing roll 7.
  • the preferably horizontal path for the sheets 114 (see FIG. 2) to be dried is indicated by a phantom line 14, and the direction of feed of sheets 114 along the path 14 is indicated by an arrow B.
  • the path 14 extends through the nip of the advancing rolls 6. 7 and through the interior of the drying chamber.
  • the lower housing section 1 further supports a horizontal shaft 8 for a set of four discrete axially spaced sheet advancing and flexing rolls 9a, 9b. 9c. 9d (see FIG. 2), and the upper housing section 3 supports a shaft for a set of three discrete advancing and flexing rolls lla. llh, llv which alternate with the rolls 9a-9d. as considered at right angles to the direction of travel of sheets [14 along the path l4.
  • One of the shafts 4,5 and one of the shafts 8J0 is driven by a motor (not shown) or another suitable prime mover.
  • the directions in which the rolls 6, 7, 9u-9d and llal4 llr' rotate when the drying apparatus is in use are indicated by arrows.
  • the shaft 4 drives the roll 6.
  • the roll 7 is rotated because it rests on the roll 6 or in response to forward movement of a sheet 114 along the path 14.
  • the rolls 9a-9d are positively driven by the shaft 8.
  • the rolls Ila-11c rotate owing to engagement with the upper side of a sheet 114 in the path 14.
  • the central portions 122, 13a ofthe walls l2, 13 form a substantially horizontal nozzle whose cross-sectional area decreases in a direction from the advancing rolls 6, 7 toward the advancing rolls 9a-9d, 110-110, i.e., in the direction (arrow B) of lengthwise movement of sheets 114.
  • the front or foremost portions 12a, 13a of the walls 12, 13 constitute a funnel-shaped inlet end of the drying chamber which is located immediately downstream of or close to the advancing rolls 6, 7 and whose cross-sectional area decreases in the same direction as the cross-sectional area of the nozzle defined by the median portions 12e, 13a of the walls 12, 13.
  • the arcuate rightmost or rearmost portions 12b, 13b of the walls 12, 13 form a discharge end which surrounds, with considerable clearance, portions of the advancing rolls 9a-9d and lla-llc.
  • the nozzle admits a gaseous drying fluid (e.g.. air) in the direction indicated by arrow C.
  • a gaseous drying fluid e.g. air
  • the arrow D indicates the direction of admission of drying fluid by way ofthe nozzle 16.
  • the direction of gas flow toward the path i4 is substantially or exactly at right angles to the direction oflengthwise travel of sheets 114 (arrow B).
  • the portions 15a. 16a of the nozzles l5. 16 preferably extend very close to the path 14 and are located at the upstream sides of the respective gas-discharging orifices 15d and 1641.
  • the portions or projections 15b are provided.
  • each ofthe nozzle portions lSb. 16b extends somewhat beyond the adjacent central portion 13a, 12a of the respective wall l3, 12.
  • the just described configuration of those portions of the nozzles 15, 16 which respectively define the orifices l5d. 16d brings about a desirable turbulence and also effects a pronounced deflection of inflowing gaseous fluid through approximately 90 i.e., the two streams of gaseous fluid first flow at right angles to and thereupon in substantial parallelism with the path 14.
  • the helical arrows shown in FIG. 1 indicate the areas where the turbulent gaseous fluid develops a dynamic pressure or velocity head and flows through the horizontal nozzle l2e. l3e of the drying chamber toward the discharge end defined by the arcuate portions 12b, 13b. It was found that the drying action of a gaseous fluid is especially satisfactory if the speed of fluid streams in the central portion of the drying chamber formed by the walls l2, I3 is between 8 and 15 meters per second.
  • the central portion of the lower wall 12 is further provided with a recess 12d for a temperature measuring gauge 12c (e.g., an NTC-resistor) which controls the temperature of the gaseous fluid supplied to the nozzles 15 and 16 by a blower 50 or an analogous source.
  • the gauge 12- can furnish signals to a transducer 5
  • An important advantage of the improved drying apparatus is that the two mirror symmetrical nozzles l5. l6 are immediately or closely adjacent to the funnelshaped inlet end 12a. 13a of the drying chamber and that the orifices 15d. 16d are closely or immediately adjacnt to the respective sides of the path 14.
  • the crosssectional area of the narrowest part of the inlet end 120. 13a is much smaller than the cross-sectional area of the narrowest part of the discharge end 12h, 13b of the drying chamber and the narrowest portion of the cross-sectional area of the discharge end 12h. 13b is sufficient to allow for practically unobstructed escape of spent gaseous fluid from the chamber.
  • This renders it possible to reduce the overall length of the drying apparatus (as considered in the direction of arrow B) because the withdrawal of desired quantities of moisture from sheets in the chamber can be completed within surprisingly short intervals of time.
  • rollers 6, 7 are preferably placed so close to the inlet end 120, 13a that they invariably prevent the escape of substantial quantities of gaseous drying fluid counter to the direction of transport of sheets I I4 through the drying chamber.
  • the transversely staggered rollers 9a-9d and llal lc' provide a number of passages through which the spent gaseous fluid can escape by way of the discharge end 12b. 13b. It will be seen that the distance between the common axis of the rolls 9a-9d and the common axis of the rolls Ila-11c is less than the diameter of a roll 9 or II.
  • the minimum cross-sectional area of the funnelshaped inlet end 120, 13a is preferably selected in such a way that the leader of a sheet 114 which has been introduced through the inlet end automatically finds its way into the space between the orifices 15d, 16d whereby the streams of'gaseousdrying fluid insure that the leader of the sheet 114 remains in the path 14 and advances toward the space between the rolls 9a-9d and Ila-11c.
  • This allows for a fully automatic threading operation, especially if the apparatus is further provided with a feeder (not shown) which feeds sucessive sheets H4 into the nip of the advancing rolls 6, 7.
  • the operator merely lifts the wall 13 and the nozzle 15 above the wall 12 by pivoting the housing section 3 about the axis of the pivot member 2.
  • the wall 13 then affords convenient access to the interior of the drying chamber. Such access to the interior of the drying chamber is desirable on the additional ground that a person in charge can inspect the internal surfaces of the walls l2. 13 to detect eventual deposition of chemicals which are carried by the sheets 114.
  • Apparatus for drying sheet-like materials comprising a hollow drying chamber having an inlet end and a discharge end. the cross-sectional area of said inlet end being substantially smaller than the cross-sectional area of said discharge end; first rotary sheet advancing means comprising a pair of rolls closely adjacent to said inlet end; second rotary sheet advancing means adjacent to said discharge end and defining with said first sheet advancing means an elongated path for travel of sheet-like material into, through and beyond said chamber; a source of gaseous drying fluid; and first and second nozzle means provided on said chamber adjacent to said inlet end at the opposite sides of said path and connected with said source.
  • said nozzle means having orifices closely adjacent to said path and arranged to discharge streams of gaseous drying fluid against the respective sides of sheet-like material in said chamber whereby the drying fluid flows along the sheetlike material to leave said chamber by way of said discharge end.
  • the cross-sectional area of said discharge end being large enough to allow for substantially unobstructed escape of gaseous fluid which is admitted into said chamber by said nozzle means and the crosssectional area of said chamber decreasing in a direction from said orifices toward said discharge end to a point near the discharge end and then increasing in crosssectional area to the discharge end.
  • said second sheet advancing means comprising first and second roll means located at opposite sides of said path. said first and second roll means defining a plurality of large passages so as to offer little resistance to escape of gaseous drying fluid by way of said discharge end.
  • Apparatus as defined in claim I further comprising control means for regulating the temperature of gaseous drying fluid which is furnished by said source.
  • said control means comprising temperature measuring means provided in said chamber.
  • said first sheet advancing means comprises a pair of elongated rolls located at the opposite sides of and extending across the full width of said path.
  • first roll means of said second sheet advancing means comprises at least two axially spaced first rolls located at one side of said path and said second roll means of said second sheet advancing means comprises at least one second roll located at the opposite side of said path, said first and second rolls being staggered relative to each other, as considered at right angles to the direction of travel of sheet-like material along said path.
  • first section connected to said first wall and a second section connected to and movable with said second wall.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
US300992A 1971-10-28 1972-10-26 Sheet drying apparatus Expired - Lifetime US3863360A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2153752A DE2153752C3 (de) 1971-10-28 1971-10-28 Trockner für blattförmige Materialien

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997977A (en) * 1972-12-26 1976-12-21 Canon Kabushiki Kaisha Developing liquid recovery device in a copying machine
US4052732A (en) * 1975-07-21 1977-10-04 Quantor Corporation Apparatus for developing and fixing heat sensitive film
US4142301A (en) * 1976-10-20 1979-03-06 Ciba-Geigy Ag Method and apparatus for drying photographic material
US4198145A (en) * 1977-04-25 1980-04-15 Rca Corporation Apparatus for developing photographic images on an emulsion coated film
US4693014A (en) * 1985-08-02 1987-09-15 Pako Corporation Photosensitive sheet dryer
US5155926A (en) * 1989-10-28 1992-10-20 Lymn Peter P A Circuit board dryer having angled, offset air jet nozzles
WO2005038369A3 (de) * 2003-10-17 2005-07-07 Atotech Deutschland Gmbh Vorrichtung und verfahren zum trocknen von behandlungsgut
US20060143936A1 (en) * 2004-09-27 2006-07-06 Roy Studebaker Shrouded floor drying fan

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2951845C2 (de) * 1979-12-21 1986-04-10 Agfa-Gevaert Ag, 5090 Leverkusen Vorrichtung zum Trocknen von band- und/oder blattförmigem, fotografischem Material

Citations (12)

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US2577915A (en) * 1948-09-21 1951-12-11 Zd Y Pre Chemicku Vyrobu Narod Method for producing artificial fibers from high molecular linear polymers or polycondensates respectively
US2586800A (en) * 1946-10-23 1952-02-26 Celanese Corp Apparatus for the treatment of filamentary materials
US3293775A (en) * 1964-06-22 1966-12-27 Itek Corp Data processing apparatus
US3346932A (en) * 1965-09-07 1967-10-17 Monsanto Co Methods for relaxing synthetic fiber filaments
US3426441A (en) * 1967-01-30 1969-02-11 Curtis Helene Ind Inc Electric hair dryer
US3545364A (en) * 1967-05-04 1970-12-08 Cordell Eng Inc Photographic processing apparatus
US3548512A (en) * 1969-07-25 1970-12-22 American Photocopy Equip Co Dryer for photographic films or the like
US3557469A (en) * 1968-11-29 1971-01-26 Donald C Edgington Graphic arts film dryer
US3606689A (en) * 1968-02-20 1971-09-21 Toyo Boseki Apparatus for heat treatment of filament
US3707777A (en) * 1970-08-06 1973-01-02 Agfa Gevaert Ag Film drying apparatus
US3718983A (en) * 1971-05-07 1973-03-06 Du Pont Sheet drying apparatus
US3736174A (en) * 1971-12-16 1973-05-29 Steel Corp Varying angle of gas impingement in gas knife process for removing excess coating

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2586800A (en) * 1946-10-23 1952-02-26 Celanese Corp Apparatus for the treatment of filamentary materials
US2577915A (en) * 1948-09-21 1951-12-11 Zd Y Pre Chemicku Vyrobu Narod Method for producing artificial fibers from high molecular linear polymers or polycondensates respectively
US3293775A (en) * 1964-06-22 1966-12-27 Itek Corp Data processing apparatus
US3346932A (en) * 1965-09-07 1967-10-17 Monsanto Co Methods for relaxing synthetic fiber filaments
US3426441A (en) * 1967-01-30 1969-02-11 Curtis Helene Ind Inc Electric hair dryer
US3545364A (en) * 1967-05-04 1970-12-08 Cordell Eng Inc Photographic processing apparatus
US3606689A (en) * 1968-02-20 1971-09-21 Toyo Boseki Apparatus for heat treatment of filament
US3557469A (en) * 1968-11-29 1971-01-26 Donald C Edgington Graphic arts film dryer
US3548512A (en) * 1969-07-25 1970-12-22 American Photocopy Equip Co Dryer for photographic films or the like
US3707777A (en) * 1970-08-06 1973-01-02 Agfa Gevaert Ag Film drying apparatus
US3718983A (en) * 1971-05-07 1973-03-06 Du Pont Sheet drying apparatus
US3736174A (en) * 1971-12-16 1973-05-29 Steel Corp Varying angle of gas impingement in gas knife process for removing excess coating

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997977A (en) * 1972-12-26 1976-12-21 Canon Kabushiki Kaisha Developing liquid recovery device in a copying machine
US4052732A (en) * 1975-07-21 1977-10-04 Quantor Corporation Apparatus for developing and fixing heat sensitive film
US4142301A (en) * 1976-10-20 1979-03-06 Ciba-Geigy Ag Method and apparatus for drying photographic material
US4198145A (en) * 1977-04-25 1980-04-15 Rca Corporation Apparatus for developing photographic images on an emulsion coated film
US4693014A (en) * 1985-08-02 1987-09-15 Pako Corporation Photosensitive sheet dryer
US5155926A (en) * 1989-10-28 1992-10-20 Lymn Peter P A Circuit board dryer having angled, offset air jet nozzles
WO2005038369A3 (de) * 2003-10-17 2005-07-07 Atotech Deutschland Gmbh Vorrichtung und verfahren zum trocknen von behandlungsgut
JP2007508520A (ja) * 2003-10-17 2007-04-05 アトテック・ドイチュラント・ゲーエムベーハー 処理済み物品を乾燥する装置および方法
US20070107256A1 (en) * 2003-10-17 2007-05-17 Atotech Deutschland Gmbh Device and method for drying a treated product
CN1867805B (zh) * 2003-10-17 2010-10-20 埃托特克德国有限公司 用于对处理过的物品进行干燥的装置和方法
JP4758350B2 (ja) * 2003-10-17 2011-08-24 アトテック・ドイチュラント・ゲーエムベーハー 処理済み物品を乾燥する装置および方法
US20060143936A1 (en) * 2004-09-27 2006-07-06 Roy Studebaker Shrouded floor drying fan
US7971369B2 (en) * 2004-09-27 2011-07-05 Roy Studebaker Shrouded floor drying fan

Also Published As

Publication number Publication date
DE2153752B2 (de) 1979-04-05
DE2153752A1 (de) 1973-05-03
DE2153752C3 (de) 1979-11-29

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