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EP0213323B1 - Application method and application device - Google Patents

Application method and application device Download PDF

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Publication number
EP0213323B1
EP0213323B1 EP19860109111 EP86109111A EP0213323B1 EP 0213323 B1 EP0213323 B1 EP 0213323B1 EP 19860109111 EP19860109111 EP 19860109111 EP 86109111 A EP86109111 A EP 86109111A EP 0213323 B1 EP0213323 B1 EP 0213323B1
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EP
European Patent Office
Prior art keywords
liquid
bar
application
web
thickness
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
Application number
EP19860109111
Other languages
German (de)
French (fr)
Other versions
EP0213323A2 (en
EP0213323A3 (en
Inventor
Toshiya C/O Fuji Photo Film Co. Ltd. Komai
Sei C/O Fuji Photo Film Co. Ltd. Kawahara
Mitsuhiro C/O Fuji Photo Film Co. Ltd. Ikeda
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Publication of EP0213323A2 publication Critical patent/EP0213323A2/en
Publication of EP0213323A3 publication Critical patent/EP0213323A3/en
Application granted granted Critical
Publication of EP0213323B1 publication Critical patent/EP0213323B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/12—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being fed round the roller
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor

Definitions

  • the present invention relates to the improvement of a process for applying a liquid composition to a continuously-moving long flexible carrier (hereinafter often simply referred to as web) in manufacturing a photographic material such as a photographic film and printing paper, a magnetic recording material such as a magnetic recording tape, or a recording material such as pressure-sensitive paper and thermosensitive recording paper, and more particularly relates to an improved method and an improved device, both of which a liquid is applied by a bar.
  • a liquid application process is generally considered consisting of a part (hereinafter referred to as application part) wherein a liquid is transferred to a web, and another part (hereinafter referred to as measuring part) wherein the liquid transferred to the web is measured out to a desired quantity
  • the application methods are classified in terms of the differences in the application part and the measuring part.
  • a roller application method, a dipping application method, a fountain application method and so forth are classified in terms of the difference in the application part, while an air knife application method, a blade application method, a bar application method and so forth are classified in terms of the difference in the measuring part.
  • An extrusion application method, a bead coating method and a curtain application method are known as those in which application and measuring-out are performed in an identical part.
  • the bar application method among others, more than a desired quantity of a liquid is transferred to a web, and the excess portion of the liquid is thereafter scraped down by a bar being at a standstill or rotating in the opposite direction to the moving direction of the web at a lower circumferential velocity than the movement of web, so that the applied liquid is adjusted to the desired quantity. Since the bar application method is characterized in that a thin layer of a liquid can be rapidly applied by a simple device and simple operation, the method is widely used. Though an optional method can be adopted as the application part of the bar application method, a roller application method, particularly a kissing application method, is most widely adopted as the application part in order to utilize the simpleness of the method.
  • Disclosed in the British 1,582,485 or USP 4,263,870 is a method in which a liquid to be applied is supplied to form a liquid accumulation immediately upstream of the contact portion between a bar and a web so as to apply the liquid to the web by the bar.
  • the operation in the method is easy, a large space is not required, and a coating film with a good surface is produced.
  • the thickness of the film of the applied liquid becomes larger at both the side edges of the web than at its other portion due to the surface tension of the liquid composition. Since the following drying of the liquid is caused to be nonuniform by the larger thickness of the film, it is desirable to make the thickness of the film uniform along the total width of the web before the liquid is dried.
  • a nozzle for sucking off an applied liquid portion is provided at each side edge of a web.
  • the nozzle is defined by L-shaped double tubes.
  • a spray or jet of a diluting liquid or solvent is supplied from the peripheral portion of the nozzle and the applied liquid portion is sucked off together with the diluting liquid or solvent by the central portion thereof.
  • the above-mentioned object of the present invention is achieved with a method of applying a liquid to a continuously moving web and a device therefor.
  • the liquid to be applied is supplied to form a liquid accumulation immediately upstream of the contact portion between a rotating bar and a continuously-moving web so as to apply the liquid to the web.
  • the method and the device are characterized in that the effective application length of the bar is set to be shorter than the width of the web so as to prevent the liquid from flying away, and the excess portion of the liquid is sucked along the end faces of the bar.
  • Fig. 1 shows a wire bar or grooved bar 1 which is rotated in the same direction as the moving direction of a continuously-moving web 2.
  • a bar supporting member 4 is disposed along the total length of the bar 1 so as to prevent the bar 1 from sagging and to serve as a liquid feeder for supplying the bar 1 with a liquid 3 to be applied.
  • the liquid 3 is supplied into a liquid guide groove 7 defined between the bar supporting member 4 and a weir member 6, through a liquid supply port 5 of the bar supporting member 4, and is then taken up by the rotating bar 1 and applied to the web 2.
  • the quantity of the liquid 3 is measured out at the contact portions of the bar 1 and the web 2 so that only a desired quantity of the liquid 3 is applied to the web 2 and the other quantity of the liquid flows down.
  • the flowed-down liquid and the newly supplied liquid form a liquid reservoir 8.
  • the liquid 3 is applied to the web 2 through the liquid reservoir 8, in a stationary state. Since the liquid 3 is applied to the web 2 from the liquid reservoir 8, the surface of the film 9 of the applied liquid 3 is improved in comparison with conventional methods.
  • the bar 1 has not only a function of transferring the liquid 3 and applying it to the web 2 but also a function of measuring out the applied liquid to a desired quantity, the whole equipment for the application is made compact, the space for the equipment is efficiently utilized, and the setting of various conditions and operation are facilitated.
  • the effective application length of the bar 1 is made shorter than the width of the web 2 in accordance with the present invention, as shown in Fig. 2, to prevent the liquid 3 from flying away from the bar 1 due to the centrifugal force thereof.
  • the excess portion 12 of the liquid 3 is sucked through suction openings 11 along the end faces 10 of the bar 1, as shown in Fig. 3.
  • the thickness of the applied liquid film on the web 2 is thus kept from becoming larger at both the side edges of the web.
  • each end face 10 of the bar 1 has a recess almost concentric with the bar as shown in Fig. 4.
  • An outer portion defining each suction opening 11 is of a static type and is provided with such a contour that the outer portion is kept fitted with the bar 1, As a result, the excess liquid portion 12 can bridge very little.
  • the form of each end face 10 of the bar 1 may be otherwise determined as shown Figs. 5, 6 and 7.
  • the thickness 1 of each peripheral edge portion of the bar 1 is set at 1 mm or less, preferably at 0.1 to 0.5 mm.
  • Wood pulp (LBKP) is beaten in 300 ml. of Canadian freeness. Sodium stearate is added to the wood pulp so that the weight of the sodium stearate is equal to 1.0 % of the completely dry weight of the pulp. After that, 1.5 % (by weight to the completely dry weight of the pulp) of aluminum sulfate and 0.5 % of a polyamide polyamine epichlorohydrin (Kymene 557 which is a commercial product made by Dick Hercules) are added to the mixture. 0.3 % of an alkyl ketene dimer (Aquapel which is a commercial product made by Dick Hercules) is then added to the mixture.
  • the mixture is thereafter made into paper in a conventional method so that the paper has an area quantity of 150 g/m 2 . 1 % (by weight to the of the paper) of calcium chloride is caused to cling to the paper by surface sizing. After the paper is dried, it is calendered to a thickness of 160 gm.
  • the reverse side of the paper is coated with a polyethylene of about 0.930 g/ml in density so that the thickness of the polyethylene is set at about 0.033 mm.
  • the obverse side of the paper is coated with a polyethylene which has a density of about 0.960 g/ml and which contains 10 % by weight of titanium oxide, so that the thickness of the polyethylene is set at about 0.030 mm.
  • a long flexible carrier which has a thickness of 230 ⁇ m and a width of 1,400 mm and is to be used to make printing paper, is thus obtained.
  • a liquid having a composition shown in Table 1 below is applied to the reverse side of the carrier, at an application speed of 180 m/min. and a quantity ratio of 6 ml./m 2 , by a wire bar application device shown in Figs. 1, 2, 3 and 4.
  • the wire bar and wire of the application device are made of stainless steel and have diameters of 50 mm and 0.08 mm, respectively.
  • the wire bar and the wire are rotated at a circumferential velocity equal to the application speed.
  • the effective application length of the bar is set at 1,374 mm as against the carrier's width of 1,400 mm.
  • the bar support of the device is made of a polytetrafluoroethylen.
  • the thickness I of each peripheral edge portion of the bar is 0.5 mm.
  • Each suction opening is defined by a high-density polyethylene and has an effective diameter of 2mm.
  • the pressure for sucking the liquid is 133,32 mbar (100 mmHg).
  • the quantity of the colloidal silica contained in the film is detected by a fluorescent X-ray measuring instrument so as to plot the standardized ratio (along the axis of the ordinate) of the applied liquid quantity in the direction (along the axis of the abscissa) of the width of the carrier, as shown in Fig. 8.
  • a liquid of the same composition as that shown in Table 1 is applied, at an application speed of 180 m/min. and a quantity ratio of 6 ml./m 2 , to the reverse side of the same long flexible carrier as that obtained in the above-described embodiment of the present invention, by a conventional wire bar application device.
  • the effective application length of the wire bar of the device is set at 1,460 mm.
  • Suction openings as provided according to the present invention are not provided in the comparative example.
  • the other conditions are the same as that of the above-described embodiment.
  • the thickness of the applied film is kept from becoming larger at both the side edges of the carrier, as described above. For that reason, the reduction of load of drying, the improvement of yield and the rationalization of maintenance work can be realized in the production of a recording material, which includes an application process and a drying process.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Description

  • The present invention relates to the improvement of a process for applying a liquid composition to a continuously-moving long flexible carrier (hereinafter often simply referred to as web) in manufacturing a photographic material such as a photographic film and printing paper, a magnetic recording material such as a magnetic recording tape, or a recording material such as pressure-sensitive paper and thermosensitive recording paper, and more particularly relates to an improved method and an improved device, both of which a liquid is applied by a bar.
  • Various conventional methods of applying a coating solution or liquid to a continuously-moving web were proposed. Since a liquid application process is generally considered consisting of a part (hereinafter referred to as application part) wherein a liquid is transferred to a web, and another part (hereinafter referred to as measuring part) wherein the liquid transferred to the web is measured out to a desired quantity, the application methods are classified in terms of the differences in the application part and the measuring part. A roller application method, a dipping application method, a fountain application method and so forth are classified in terms of the difference in the application part, while an air knife application method, a blade application method, a bar application method and so forth are classified in terms of the difference in the measuring part. An extrusion application method, a bead coating method and a curtain application method are known as those in which application and measuring-out are performed in an identical part.
  • In the bar application method among others, more than a desired quantity of a liquid is transferred to a web, and the excess portion of the liquid is thereafter scraped down by a bar being at a standstill or rotating in the opposite direction to the moving direction of the web at a lower circumferential velocity than the movement of web, so that the applied liquid is adjusted to the desired quantity. Since the bar application method is characterized in that a thin layer of a liquid can be rapidly applied by a simple device and simple operation, the method is widely used. Though an optional method can be adopted as the application part of the bar application method, a roller application method, particularly a kissing application method, is most widely adopted as the application part in order to utilize the simpleness of the method.
  • However, since the application part and measuring part of the conventional bar application method are completely independent of each other, conditions need to be separately set for the parts to apply the liquid. For that reason, the method is not only troublesome but also requires a large space, which means that the space utilization is uneconomical.
  • Disclosed in the British 1,582,485 or USP 4,263,870 is a method in which a liquid to be applied is supplied to form a liquid accumulation immediately upstream of the contact portion between a bar and a web so as to apply the liquid to the web by the bar. The operation in the method is easy, a large space is not required, and a coating film with a good surface is produced.
  • In the above-mentioned application process, the thickness of the film of the applied liquid becomes larger at both the side edges of the web than at its other portion due to the surface tension of the liquid composition. Since the following drying of the liquid is caused to be nonuniform by the larger thickness of the film, it is desirable to make the thickness of the film uniform along the total width of the web before the liquid is dried.
  • Disclosed in the United States Patent No. 2,899,339 are a method and a device, in which a nozzle for sucking off an applied liquid portion is provided at each side edge of a web. The nozzle is defined by L-shaped double tubes. A spray or jet of a diluting liquid or solvent is supplied from the peripheral portion of the nozzle and the applied liquid portion is sucked off together with the diluting liquid or solvent by the central portion thereof.
  • It is an object of the present invention to provide an improved application method in which an applied liquid portion does not need to be removed from the thicker section of an applied liquid film by a nozzle or the like as described above, and such thicker section is not produced at each side edge of a web.
  • The above-mentioned object of the present invention is achieved with a method of applying a liquid to a continuously moving web and a device therefor. In the method, the liquid to be applied is supplied to form a liquid accumulation immediately upstream of the contact portion between a rotating bar and a continuously-moving web so as to apply the liquid to the web. The method and the device are characterized in that the effective application length of the bar is set to be shorter than the width of the web so as to prevent the liquid from flying away, and the excess portion of the liquid is sucked along the end faces of the bar.
    • Figs. 1 and 2 show schematic views of a bar application device which indicate the way how the present invention is embodied;
    • Figs. 3 and 4 show sectional front views of the main portion of an application part according to the present invention;
    • Figs. 5, 6 and 7 show sectional front views of main portions, which indicate bar end face forms according to the present invention; and
    • Figs. 8 and 9 show experimental data.
  • The way how the present invention is embodied is now described in detail with reference to the drawings. Fig. 1 shows a wire bar or grooved bar 1 which is rotated in the same direction as the moving direction of a continuously-moving web 2. A bar supporting member 4 is disposed along the total length of the bar 1 so as to prevent the bar 1 from sagging and to serve as a liquid feeder for supplying the bar 1 with a liquid 3 to be applied. The liquid 3 is supplied into a liquid guide groove 7 defined between the bar supporting member 4 and a weir member 6, through a liquid supply port 5 of the bar supporting member 4, and is then taken up by the rotating bar 1 and applied to the web 2. At that time, the quantity of the liquid 3 is measured out at the contact portions of the bar 1 and the web 2 so that only a desired quantity of the liquid 3 is applied to the web 2 and the other quantity of the liquid flows down. The flowed-down liquid and the newly supplied liquid form a liquid reservoir 8. For that reason, the liquid 3 is applied to the web 2 through the liquid reservoir 8, in a stationary state. Since the liquid 3 is applied to the web 2 from the liquid reservoir 8, the surface of the film 9 of the applied liquid 3 is improved in comparison with conventional methods. Furthermore, since the bar 1 has not only a function of transferring the liquid 3 and applying it to the web 2 but also a function of measuring out the applied liquid to a desired quantity, the whole equipment for the application is made compact, the space for the equipment is efficiently utilized, and the setting of various conditions and operation are facilitated.
  • In one of conventional methods which serve to prevent the thickness of an applied liquid film from becoming larger at each side edge of a carrier, the excess liquid portion at the side edge is scraped down by a metal doctor or the like before the applied liquid film is dried. However, since the doctor is located in contact with the carrier, the surface of the carrier is damaged. In the other conventional method, heating air is blown to the applied liquid film portion of larger thickness so as to forcibly dry the portion completely. However, the latter method requires a larger equipment whose operation is very troublesome.
  • To solve such problems, the effective application length of the bar 1 is made shorter than the width of the web 2 in accordance with the present invention, as shown in Fig. 2, to prevent the liquid 3 from flying away from the bar 1 due to the centrifugal force thereof. In addition, the excess portion 12 of the liquid 3 is sucked through suction openings 11 along the end faces 10 of the bar 1, as shown in Fig. 3. The thickness of the applied liquid film on the web 2 is thus kept from becoming larger at both the side edges of the web.
  • In the embodiment of the present invention, each end face 10 of the bar 1 has a recess almost concentric with the bar as shown in Fig. 4. An outer portion defining each suction opening 11 is of a static type and is provided with such a contour that the outer portion is kept fitted with the bar 1, As a result, the excess liquid portion 12 can bridge very little. The form of each end face 10 of the bar 1 may be otherwise determined as shown Figs. 5, 6 and 7. The thickness 1 of each peripheral edge portion of the bar 1 is set at 1 mm or less, preferably at 0.1 to 0.5 mm.
  • A preferred embodiment of the present invention is described in detail below. However, the present invention is not confined to the embodiment.
    • Preferred embodiment
  • Wood pulp (LBKP) is beaten in 300 ml. of Canadian freeness. Sodium stearate is added to the wood pulp so that the weight of the sodium stearate is equal to 1.0 % of the completely dry weight of the pulp. After that, 1.5 % (by weight to the completely dry weight of the pulp) of aluminum sulfate and 0.5 % of a polyamide polyamine epichlorohydrin (Kymene 557 which is a commercial product made by Dick Hercules) are added to the mixture. 0.3 % of an alkyl ketene dimer (Aquapel which is a commercial product made by Dick Hercules) is then added to the mixture. The mixture is thereafter made into paper in a conventional method so that the paper has an area quantity of 150 g/m2. 1 % (by weight to the of the paper) of calcium chloride is caused to cling to the paper by surface sizing. After the paper is dried, it is calendered to a thickness of 160 gm. The reverse side of the paper is coated with a polyethylene of about 0.930 g/ml in density so that the thickness of the polyethylene is set at about 0.033 mm. The obverse side of the paper is coated with a polyethylene which has a density of about 0.960 g/ml and which contains 10 % by weight of titanium oxide, so that the thickness of the polyethylene is set at about 0.030 mm. A long flexible carrier, which has a thickness of 230 µm and a width of 1,400 mm and is to be used to make printing paper, is thus obtained. A liquid having a composition shown in Table 1 below is applied to the reverse side of the carrier, at an application speed of 180 m/min. and a quantity ratio of 6 ml./m2, by a wire bar application device shown in Figs. 1, 2, 3 and 4.
    Figure imgb0001
  • The wire bar and wire of the application device are made of stainless steel and have diameters of 50 mm and 0.08 mm, respectively. The wire bar and the wire are rotated at a circumferential velocity equal to the application speed. The effective application length of the bar is set at 1,374 mm as against the carrier's width of 1,400 mm. The bar support of the device is made of a polytetrafluoroethylen. The thickness I of each peripheral edge portion of the bar is 0.5 mm. Each suction opening is defined by a high-density polyethylene and has an effective diameter of 2mm. The pressure for sucking the liquid is 133,32 mbar (100 mmHg). After the applied film of the liquid is dried, the quantity of the colloidal silica contained in the film is detected by a fluorescent X-ray measuring instrument so as to plot the standardized ratio (along the axis of the ordinate) of the applied liquid quantity in the direction (along the axis of the abscissa) of the width of the carrier, as shown in Fig. 8.
    • Comparative example
  • A liquid of the same composition as that shown in Table 1 is applied, at an application speed of 180 m/min. and a quantity ratio of 6 ml./m2, to the reverse side of the same long flexible carrier as that obtained in the above-described embodiment of the present invention, by a conventional wire bar application device. The effective application length of the wire bar of the device is set at 1,460 mm. Suction openings as provided according to the present invention are not provided in the comparative example. The other conditions are the same as that of the above-described embodiment. After the applied film of the liquid is dried, applied quantity data corresponding to those shown in Fig. 8 are obtained as shown in Fig. 9. By comparing the data shown in Fig. 8 with those shown in Fig. 9, it is found out that according to the present invention, the thickness of the applied film does not become larger at both the side edges of carrier.
  • According to the present invention, the thickness of the applied film is kept from becoming larger at both the side edges of the carrier, as described above. For that reason, the reduction of load of drying, the improvement of yield and the rationalization of maintenance work can be realized in the production of a recording material, which includes an application process and a drying process.

Claims (6)

1. A method of applying a liquid to a continuously moving web, in which the liquid (3) to be applied is supplied to form a liquid reservoir (8) immediately upstream of the contact portion between a rotating bar (1) and the continuously-moving web (2) so as to apply said liquid (3) to said web (2), characterized in that the effective application length of said bar (1) is shorter than the width of said web (2) so as to prevent said liquid (3) from flying away; and excess liquid (12) is sucked along the end faces (10) of said bar (1).
2. A device for applying a liquid to a continuously moving web, in which a liquid (3) to be applied is supplied to form a liquid reservoir (8) immediately upstream to the contact portions of a rotating bar (1) and a continuously-moving web (2) so as to apply said liquid (3) to said web (2), characterized in that suction openings (11) are provided at both end faces (10) of said effective application length part of said bar (1) which, in use, is set to be shorter than the width of said web (2).
3. A device for application as claimed in claim 2, characterized in that both the end faces (10) of the effective application length part of said bar (1) have recesses almost concentric with said bar (1); and outer portions which define said suction openings (11) have such contours that said outer portions are fitted with said recesses.
4. A device for application as claimed in claim 3, characterized in that said outer portions defining said suction openings (11) are of the static type.
5. A device for application as claimed in claim 2, 3 or 4, characterized in that each peripheral edge portion of said bar (1) has a thickness of 1 mm or less.
6. A device for application as claimed in claim 2, 3 or 4, characterized in that each peripheral edge portion of said bar (1) has a thickness of 0.1 mm to 0.5 mm.
EP19860109111 1985-07-04 1986-07-03 Application method and application device Expired EP0213323B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP147123/85 1985-07-04
JP14712385A JPS627467A (en) 1985-07-04 1985-07-04 Coating method and apparatus

Publications (3)

Publication Number Publication Date
EP0213323A2 EP0213323A2 (en) 1987-03-11
EP0213323A3 EP0213323A3 (en) 1987-11-04
EP0213323B1 true EP0213323B1 (en) 1989-10-11

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DE (1) DE3666151D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0376207A3 (en) * 1988-12-26 1991-07-03 Fuji Photo Film Co., Ltd. Application device
JP3758098B2 (en) * 1995-10-16 2006-03-22 富士写真フイルム株式会社 Coating method and coating apparatus
JP2002182375A (en) * 2000-12-13 2002-06-26 Fuji Photo Film Co Ltd Method for producing planographic printing plate and apparatus therefor
JP7084433B2 (en) * 2020-01-14 2022-06-14 日東電工株式会社 Coating machine, film manufacturing system, and film manufacturing method

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
US2899339A (en) * 1957-08-23 1959-08-11 Foating to a moving web
JPS584589B2 (en) * 1976-08-12 1983-01-27 富士写真フイルム株式会社 Application method
JPS584589A (en) * 1981-07-01 1983-01-11 川嶋工業株式会社 Sheath of knife
JPS59142063U (en) * 1983-03-15 1984-09-22 日立マクセル株式会社 Web coating surface processing equipment

Also Published As

Publication number Publication date
JPS627467A (en) 1987-01-14
EP0213323A2 (en) 1987-03-11
DE3666151D1 (en) 1989-11-16
EP0213323A3 (en) 1987-11-04
JPH0582271B2 (en) 1993-11-18

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