US3765099A - Method and apparatus for drying wet surfaces - Google Patents

Method and apparatus for drying wet surfaces Download PDF

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Publication number
US3765099A
US3765099A US00330046A US3765099DA US3765099A US 3765099 A US3765099 A US 3765099A US 00330046 A US00330046 A US 00330046A US 3765099D A US3765099D A US 3765099DA US 3765099 A US3765099 A US 3765099A
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US
United States
Prior art keywords
electrode
electrode means
support means
carrier
wet
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Expired - Lifetime
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US00330046A
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English (en)
Inventor
J Kohlmannsperger
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Agfa Gevaert AG
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Agfa Gevaert AG
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Publication date
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
    • G03G15/11—Removing excess liquid developer, e.g. by heat

Definitions

  • the present invention relates to a method and apparatus for drying wet surfaces, especially wet surfaces of photoelectric or dielectric copy carriers.
  • the method according to the present invention for drying wet surfaces, especially wet surfaces of electrographic or dielectric copy carriers mainly comprises the steps of moving an elongated combshaped electrode, having points directed toward but out of contact with the wet surface of a carrier, and the latter relative to each other in a direction transverse to the elongation of the electrode while applying a potential difference to the eletrode and the carrier to thus produce gas ions emanating at high speed from the electrode and a resulting gasion and air stream directed toward the surface which will push a liquid film on the surface off the latter during the relative movement of the electrode and the carrier.
  • the apparatus for carrying out the above method mainly comprises support means having a surface for supporting a copy carrier with the wet surface thereof exposed, elongated electrode means having a plurality of closely adjacent pointed elements, the points of which are closely adjacent but out of contact with the exposed wet surface of the copy carrier on the support means, the support means and the electrode means being arranged for movement with respect to each other in a direction transverse to the elongation of the electrode means, and means are provided for applying a potential difference to the electrode means and the support means and a copy carrier thereon.
  • the support means with the copy carrier thereon may be arranged stationarily and in this case there is preferably provided a carriage mounting the electrode means for movement in the aforementioned direction and the support means preferably also includes means for guiding the carriage during its movement relative to the support means.
  • the aforementioned pointed elements may be constituted by pointed teeth of a comb-shaped electrode, and this electrode may either be straight or V-shaped, located in a plane substantially parallel to the surface on the support means with the apex of the V-shaped electrode located between side edges of a carrier on the support means and arranged in such a manner that during relative movement of the elctrode and the support means with the carrier thereon, a wet film on the exposed surface will be displaced toward the side edges of the carrier.
  • the electrode means may also comprise an elongated cylinder having a plurality of pointed elements, such as pins, projecting closely arranged to each other in substantially radial direction from the peripheral surface of the cylinder and in this case the apparatus may include means for rotating the cylinder about its axis during relative movement of the electrode means and the carrier in a direction transverse to the axis.
  • pointed elements such as pins
  • the strength of the electric field on the edges and points of the electrode will be very great so that the air between the electrode and the wet surface will be ionized and the thus produced gas ions will obtain a very high speed.
  • This will result in a gas-ion-air stream directed toward the wet surface which will, during relative movement of the electrode means and the wet surface on the copy carrier, push the liquid film on the exposed surface of the copy carrier toward the end edge of the latter to which the electrode moves, respectively, if the electrode means is V-shaped, toward the side edges of the copy carrier.
  • electrographic copying apparatus are provided with a source of high tension, which, during drying of the copy carrier, will not be needed, this source can be used for applying the potential difference to the electrode means and the copy carrier on the support means.
  • two or more such electrodes may be arranged parallel to each other to obtain an improved drying of the copy carrier and the same result will also be obtained with the above-mentioned rotatable electrode means.
  • FIG. 1 is a schematic perspective view of a first embodiment of an apparatus according to the present invention in which the electrode means comprise two substantially straight and parallel comb-shaped electrodes;
  • FIG. 2 is a schematic perspective view of a second embodiment in which the two electrodes are V-shaped.
  • FIG. 3 is a schematic perspective view of a third embodiment in which the electrode is a rotatable cylindrical electrodewith rows of pointed elements thereon.
  • the apparatus may comprise support means 1, shown in FIG. 1 as a support plate preferably consisting of aluminum having an upper surface adapted to support thereon an element, for instance a copy carrier 2, the exposed wet surface thereof has to be dried.
  • a pair of comb-shaped electrodes preferably made of steel, the pointed teeth of which are directed toward, but out of contact, with the exposed surface of the element 2 on the support plate 1 are arranged extending parallel to each other and substantially normal to the side edges of the support plate 1.
  • the electrodes 5 are carried at opposite ends by carriage means 3 for movement in a direction substantially normal to the elongation of the comb-shaped electrodes 5 relative to the support plate, as indicated by the double-headed arrow 4.
  • the support plate 1 is preferably provided along the side edges thereof with ledges l for guiding the carriage 3 in the aforementioned direction.
  • the carriage 3 has to be insulated from the support plate by providing the carrier for instance with rubber rollers.
  • the support plate 1 is preferably provided with a groove la extending around a copy carrier on the surface of the support plate for receiving the liquid pushed off the exposed surface of the copy carrier, and the aforementioned groove 1a preferably is connected to a container, not shown, for receiving the pushed off liquid.
  • FIG. 2 shows a second embodiment similar to the embodiment described above in connection with FIG. 1 and the main difference between the construction shown in FIG. 1 and that shown in FIG. 2 is that the comb-shaped electrodes 5' are in this embodiment substantially V-shaped and arranged in a plane substantially parallel to the exposed wet surface.
  • the apex of the V-shaped electrodes 5' is arranged in such a man ner that during relative movement of the electrodes 5 and the support plate 1 with the copy carrier 2 thereon a wet film on the exposed carrier surface will be displaced toward the'side edges of the copy carrier.
  • FIG. 3 schematically illustrates a third embodiment in which the electrode means 6 is constituted by an elongated small-diameter cylinder, from the peripheral surface thereof a plurality of pointed elements project in substantially radial direction.
  • the pointed elements are preferably arranged in rows circumferentially displaced about the peripheral surface of the cylinder.
  • Drive means are provided for rotating the cylindrical electrode 6 about its axis, and such drive means are shown in FIG. 3 as an electromotor 7 connected to the electrode for rotating the latter about its axis.
  • the support for the electrode and the electromotor connected thereto is not shown in the drawing, and these two members may be supported on a carriage 3 similar to that shown in FIG. 3 so that the electrode 6 and the drive motor 7 and the support plate 1 may be moved relative to each other in the direction as indicated by the double-headed arrow 4.
  • the drive motor 7 is preferably reversible so that during movement of the electrode 6 toward the rear end of the support plate 1, as viewed in FIG.
  • the electrode 6 may be rotated about its axis in the direction of the arrow 6', whereas during movement of the electrode toward the front end of the support plate the electrode may be rotated in the opposite direction, to drive thereby a liquid film on the exposed wet surface of the copy carrier 2 ahead of the rotating electrode toward the respective end edge of the copy carrier 2.
  • the electrode and the motor 7 on a fixed support and to move the support plate 1 with the copy carrier thereon relative to the electrode in the direction as indicated by the double-headed arrow 4.
  • At pointed ends of the electrodes are in all'embodiments discussed above spaced a distance of about 10 to 12 mm from the exposed surface of the copy carrier 2.
  • the invention has been illustrated and de scribed as embodied in an apparatus for drying the exposed wet surface of a copy carrier or the like, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
  • the electrodes '5 as shown in FIG. 1 or the rotating electrode 6 illustrated in FIG. 3 may also be arranged inclined at an angle of less than to the direction of movement of the electrode relative to the support plate. It is further understood that not only surfaces of a photo carrier but also other surfaces may be dried with the apparatus according to the present invention.
  • a method of drying surfaces comprising the steps of moving elongated electrode means, having a plurality of closely adjacent pointed elements, the points of which are closely adjacent but out of contact with the wet surface, and the wet surface relative to each other in a direction transverse to the elongation of said electrode means; and applying during such movement a potential difference to said electrode means and said surface to thus produce gas ions emanating at high speed from said electrode means, resulting in a gas-ion and air stream direct to said surface so as to push a liquid film on said wet surface off the latter during the relative movement of said electrode means and said surface.
  • Apparatus for drying wet surfaces of elements, especially surfaces of an electrophotographic or dielectric copy carrier comprising, in combination, support means having a surface for supporting an element with the wet surface thereof exposed; elongated electrode means having a plurality of closely adjacent pointed elements, the points of which are closely adjacent but out of contact with the exposed wet surface of an element on said support means, said support means and said electrode means being arranged for movement with respect to each other in a direction transverse to the elongation of said electrode means; and means for applying a potential difference to said electrode means and said support means and the element thereon.
  • said elongated electrode means is V-shaped and located in a plane substantially parallel to said surface of said support means, with the apex of said V-shaped electrode means located between side edges of an element on said support means, said apex being arranged in such a manner that during relative movement of said electrode means and said support means with said element thereon, a wet film on said exposed surface will be displaced toward said side edges of said element.
  • said support means has opposite ends and is arranged stationarily, and including carriage means mounting said V- shaped electrode means movable during a working stroke from one to the opposite end of said support means with the apex of said V-shaped electrode means leading during the movement of said carriage along said working stroke.
  • said electrode means comprise an elongated cylinder and a plurality of pointed elements projecting closely arranged to each other in substantially radial direction from the peripheral surface of said cylinder, and including means for rotating said cylinder about its axis during relative movement of said electrode means and said element in a direction transverse to said axis.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Drying Of Solid Materials (AREA)
  • Wet Developing In Electrophotography (AREA)
US00330046A 1972-02-08 1973-02-06 Method and apparatus for drying wet surfaces Expired - Lifetime US3765099A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2205800A DE2205800A1 (de) 1972-02-08 1972-02-08 Verfahren und vorrichtung zum trocknen von oberflaechen

Publications (1)

Publication Number Publication Date
US3765099A true US3765099A (en) 1973-10-16

Family

ID=5835331

Family Applications (1)

Application Number Title Priority Date Filing Date
US00330046A Expired - Lifetime US3765099A (en) 1972-02-08 1973-02-06 Method and apparatus for drying wet surfaces

Country Status (7)

Country Link
US (1) US3765099A (ru)
JP (1) JPS5137781B2 (ru)
BE (1) BE794764A (ru)
DE (1) DE2205800A1 (ru)
FR (1) FR2171124B1 (ru)
GB (1) GB1426110A (ru)
IT (1) IT977214B (ru)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050162A (en) * 1975-01-15 1977-09-27 Candor James T Method and apparatus for removing liquid from liquid bearing material
US4135307A (en) * 1976-06-11 1979-01-23 Candor James T Method and apparatus for removing liquid from liquid bearing material
US5152838A (en) * 1989-01-17 1992-10-06 Polaroid Corporation Coating fluid drying apparatus
US5195250A (en) * 1991-08-13 1993-03-23 Zito Richard R Electronic devolatilizer
US6559432B1 (en) * 2000-08-03 2003-05-06 Casco Products, Inc. Apparatus and methods for welding flexible material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2231457A (en) * 1936-08-03 1941-02-11 John L Stephen Electrical apparatus
US3636637A (en) * 1970-05-06 1972-01-25 Graphic Pollution Control Inc Method and apparatus for drying liquid deposited on liquid receptive material
US3667130A (en) * 1966-03-07 1972-06-06 Robert R Candor Liquid removing apparatus and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2231457A (en) * 1936-08-03 1941-02-11 John L Stephen Electrical apparatus
US3667130A (en) * 1966-03-07 1972-06-06 Robert R Candor Liquid removing apparatus and method
US3636637A (en) * 1970-05-06 1972-01-25 Graphic Pollution Control Inc Method and apparatus for drying liquid deposited on liquid receptive material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050162A (en) * 1975-01-15 1977-09-27 Candor James T Method and apparatus for removing liquid from liquid bearing material
US4135307A (en) * 1976-06-11 1979-01-23 Candor James T Method and apparatus for removing liquid from liquid bearing material
US5152838A (en) * 1989-01-17 1992-10-06 Polaroid Corporation Coating fluid drying apparatus
US5195250A (en) * 1991-08-13 1993-03-23 Zito Richard R Electronic devolatilizer
US6559432B1 (en) * 2000-08-03 2003-05-06 Casco Products, Inc. Apparatus and methods for welding flexible material

Also Published As

Publication number Publication date
IT977214B (it) 1974-09-10
BE794764A (nl) 1973-07-31
FR2171124A1 (ru) 1973-09-21
JPS4893341A (ru) 1973-12-03
FR2171124B1 (ru) 1976-09-10
DE2205800A1 (de) 1973-08-16
GB1426110A (en) 1976-02-25
JPS5137781B2 (ru) 1976-10-18

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