US3929097A - Apparatus for coating a web - Google Patents

Apparatus for coating a web Download PDF

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Publication number
US3929097A
US3929097A US386822A US38682273A US3929097A US 3929097 A US3929097 A US 3929097A US 386822 A US386822 A US 386822A US 38682273 A US38682273 A US 38682273A US 3929097 A US3929097 A US 3929097A
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US
United States
Prior art keywords
web
coating
roll
coating roll
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
US386822A
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English (en)
Inventor
Masao Kanda
Mineo Suefuji
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
Application granted granted Critical
Publication of US3929097A publication Critical patent/US3929097A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B05C1/0843—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 backed up by gas jet means for pushing the material in contact with the coating 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
    • 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
    • B05C1/0834—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 the coating roller co-operating with other rollers, e.g. dosing, transfer rollers

Definitions

  • This invention relates to an apparatus for coating a web of paper, plastic film and the like with a coating material, which imparts various properties to the surface of the web, and, more particularly, to an apparatus for coating a flexible web with a coating material using a coating roll partially immersed in a reservoir of the coating material and partially in surface contact with the flexible web for coating the web with the material.
  • the web can be coated with the coating material at a high speed.
  • the air flow due to the running web tends to enter between the web and the coating roll resulting a separation of the web from the surface of the coating roll.
  • the separation of the web from the coating roll naturally causes the localized malcoating of the material on the web and the production of useless web articles without the coating layer. This malfunction of the coating apparatus particularly occurs where the web is so thin that a large tension cannot be exerted thereon or the web is slackened.
  • a primary object of the present invention is to provide a coating apparatus for coating a running web with a coating material by use of a coating roll in which the web is firmly put into proper contact with the coating roll at a constant soft pressure whereby the coating material is stably and uniformly transferred from the coating roll to the web at a high speed.
  • Another object of the present invention is to provide a coating apparatus for coating a running web with a coating material at a high speed by use of a coating roll which is suitable for coating a thin and weak web which cannot be highly tensioned.
  • Still another object of the present invention is to provide a coating apparatus for coating a running web with a coating material which is suitable for coating a flexible web with a coating material which is sensitive to and broken by a strong pressure.
  • the most prominent feature of the coating apparatus in accordance with the present invention is that the coating material can be applied on a flexible web running at a high speed under stable conditions to form a uniform layer of coating thereon.
  • the coating apparatus in accordance with the present invention utilizes air pressure causing the web to be pressed lightly against the coating roll. Therefore, in accordance with the present invention, it is possible to apply the coating material at a constant thickness without destroying the properties of the coating material. Further, it is possible to apply the coating material uniformly on the web without scratching the surface of the web or without making wrinkles in or causing slack in the web. It will be also understood that the application of the coating material on the web can be performed at a low. cost in accordance with this invention. Further, since the application of the coating material to the web can be performed stably in a constant thickness even if the thickness of the web is not uniform.
  • the coating apparatus in accordance with the present invention is applicable ito various technical areas such as paper manufacture, photographic film manufacture, any kind of copying paper manufacture, plastic sheet film manufacture, textileindustries and so forth, in which various kinds of coating material are applied on a continuously travelling web.
  • FIG. 1 is a schematic side view showing the arrangement of the web coating apparatus in accordance with the present invention
  • FIG. 2 is a schematic sectional side view showing the main portion of the web coating apparatus in accordance with an embodiment of the present invention
  • FIG. 3 is a schematic sectional front view of a main portion of the web coating apparatus as shown in FIG.
  • FIG. 4 is a sectional side view showing another embodiment of the coating apparatus in accordance with the present invention.
  • FIG. 5 is a sectional front view of the apparatus shown in FIG. 4,
  • FIG 6 is a sectional side view showing still'another embodiment of the coating apparatus in accordance with the present invention.
  • FIG. 7 is a sectional front view of the apparatus shown inFIG. 6, I
  • FIG. 8 is a sectional side view showing a further embodiment of the coating apparatus in accordance with the present invention.
  • FIG. 9 is a sectional front view of the apparatus shown in FIG. 8, and
  • FIG. 10 is a schematic sectional side view of a main portion of the web coating apparatus in accordance with a still further embodiment of the present invention showing an application thereof.
  • the reference numeral 1 indicates a flexible web such as paper, film and the like travelling continuously in the longitudinal direction along a press roll 2, a coating roll 3 and a backing roll 7.
  • the web I is pressed lightly on the periphery of the coating roll 3 by the tension made by the press roll 2 and the backing roll 7.
  • the coating roll 3 is partly immersed in a coating material 5 contained a reservoir 4 so that the surface of the coating roll 3 may carry the coating material 5 thereon upward when it rotates about its axis.
  • the backing roll 7 serves to feed the web 1 therearound by contacting the back surface thereof and hold the web 1 against the air flow ejected from an air doctor 6 which in turn scrapes off the excessive amount of coating material on the web 1 and makes the surface of the coating layer smooth.
  • Reference numeral 8 indicates an air box or air chamber located close to the web on the coating roll 3, there being a slight space between the air box 8 and the back surface of the web 1.
  • the air box 8 is supplied with an air flow to provide a-static air pressure on the backside of the travelling web 1.
  • Reference numeral 9 indicates a duct for supplying the air flow'from a high pressure fan or blower 10.
  • FIGS. 2 and 3 showing the internal construction of the air chamber 2, high pressure air sent from a blower, not shown, passes through the ducts 9 and enters into a cylindrical filter 12 from both ends thereof through a pair of duct guides 11 and 11' connected at the opposite ends of the cylindrical filter 12.
  • Cylindrical filter 12 is arranged laterally with the coating roll 3 with its central axis parallel to the axis of revolution of the rll3.
  • the cylindrical filter 12 is covered by air chamber 8 and an air space 13 is defined around the cylindrical filter 12 on the surface of the coating roll 3.
  • the pressurized air sent into the cylindrical filter l2 flows out of the filter 12 through the filter wall thereof and is filtered thereby, and the pressurized air fills air space 13 to maintain a static air pressure in the air space 13.
  • This air pressure holds the running web in good contact with the surface of the coating roll 3 and escapes away through a small space formed betweenthe surface of the web and the lower end of the air chamber 8.
  • pressurized air sent from a blower, not shown, through ducts 9 is introduced into the filter having a cylindrical configuration by way of a pair of duct guides 11, 11' similar to the apparatus shown in FIGS. 2 and 3.
  • the pressurized air sent into the cylindrical filter 12 flows out of the filter l2 and fills the air space 13.
  • the air space 13 is defined by a pair of side walls and an upper plate and a lower bottom plate having a pair of openings, such as slits or a plurality of holes, 15 and 16 on the both sides thereof. Openings l5 and 16 extend parallel to the axis of revolution of the coating roll 3 and a bottom plate 14 is provided between the openings 15 and 16.
  • FIGS. 6 and 7 showing a third embodiment of the present invention
  • a lateral slit 31 formed between a pair of plates 17 and 18 having openings such as slits or a plurality of holes laterally extending to confine an air chamber around the cylindrical chamber 12 and form a lateral opening 31 thereunder in parallel relationship thereto.
  • opening 31 thin membranes l9 and 20, with a small slit or holes 21 are provided.
  • the membranes l9 and 20 are flexible and thin so that the air pressure may push the membranes l9 and 20 towards the back surface of the web 1 and the dynamic air pressure created by air flow between the membranes l9 and 20 will press lightly against web 1 together with the static air pressure generated by the air flowing out of the slit 21 thereof.
  • web 1 is pressed lightly against the surface of the coating roll 3 and the coating material 5 contained in the reservior 4 and carried on the; surface of the coating roll 3 is well applied onto the surface of the flexible web 1.
  • the flexible membranes l9 and 20 can be of a flexible material such as polyethylene film, vinyl chloride film, other high molecular weight films, cotton cloth, linen cloth, silk cloth, other textile cloths, rubber film and so forth.
  • an air chamber 22 is connected with a pair of ducts 9 and 9" through a pair of duct guides 1 l and 11.
  • the air chamber 22 is an elongated chamber extending laterally, parallel to the axis of the coating roll 3.
  • the air chamber 22 has a narrow opening, such as a slit or a plurality of holes 23 at the bottom thereof extending close to the top of the coating roll 3 in parallel relationship thereto as shown in FIGS. 8 and 9.
  • Coating roll 3 is provided just under the opening-23 with a slight space therebetween so that the air jet streaming out of the opening 23 can blow strongly against the back surface of the web 1 and the coating material 5 carried on the coating roll 3 can be sufficiently and stably transferred from the coating roll 3 to the surface of the running web 1.
  • an air chamber 8 for blowing an air stream on the backside of the flexible web 1 is made movable for up and down motion.
  • Upstream of air chamber 8 is provided a lap roll 26 rotatably supported on a fixed shaft and downstream of the air chamber 8 is provided a backing roll 7 on a fixed shaft.
  • the position of the lap roll 26 and the backing roll 7 is so selected that the web 1, tensioned therebetweeri, may not be in contact with the surface of the coating roll 3 when the air chamber 8 is out of the way of the web or retracted upward as indicated with a broken line 24 in FIG. 16.
  • Web 1 is put into contact with the surface of the coating roll 3 when the air chamber 8 is moved downward to urge the web to be in contact therewith as indicated with a dot-and-dash line 25 in FIG. 10.
  • Air chamber 8 is supplied with a pressurized air introduced thereto and air jet streams of openings 27, 28 and 29 push the web downward therewith.
  • the web 1 is brought down, into contact with the surface of the coating roll 3 as shown in FIG. 10, and the coating material carried thereby is applied on the surface of the web 1.
  • the position of the central slit 28 should be selected horizontally between the axis of the coating roll 3 and the edge of the reservoir 4 containing the coating material 5.
  • a web coating apparatus employing a coating roll and means for feeding the web into contact with the coating roll periphery which carries a coating material thereon, the improvement comprising:
  • said air chamber further comprises a plate facing said web and having at least one opening therein parallel to and in alignment with the opening within I said flexible membrane, said plate being positioned to the side of said flexible membrane opposite that of said web.
  • said air chamber overlying the back of said web and being movable towards said web to press said web against the periphery of said coating roll, said air chamber including a bottom plate and having a plurality of spaced, laterally extending openings parallel to the axis of rotation of said coating roll,
  • pressurized air generating means coupled to said air chamber for pressurizing said chamber such that said pressurized air passing through said openings of said bottom plate presses the back of said web against said coating roll periphery
  • openings within the bottom plate of said air chamber are three in number and comprise parallel, lateral slits with the central slit being upstream of the axis of rotation of the coating roll.

Landscapes

  • Coating Apparatus (AREA)
  • Advancing Webs (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US386822A 1972-08-09 1973-08-08 Apparatus for coating a web Expired - Lifetime US3929097A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47079745A JPS4935438A (fr) 1972-08-09 1972-08-09

Publications (1)

Publication Number Publication Date
US3929097A true US3929097A (en) 1975-12-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
US386822A Expired - Lifetime US3929097A (en) 1972-08-09 1973-08-08 Apparatus for coating a web

Country Status (5)

Country Link
US (1) US3929097A (fr)
JP (1) JPS4935438A (fr)
DE (1) DE2340177A1 (fr)
ES (1) ES417565A1 (fr)
GB (1) GB1430613A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096826A (en) * 1976-05-21 1978-06-27 Xerox Corporation Magnetic brush development system for flexible photoreceptors
US4103644A (en) * 1976-09-16 1978-08-01 Michels Norman C Apparatus for coating one side only of strip material
US4172911A (en) * 1976-09-16 1979-10-30 Michels Norman C Method of coating one side only of strip material
WO1986006655A1 (fr) * 1985-05-13 1986-11-20 Wallace Knight Limited Appareil et methode de revetement d'un substrat
US4655163A (en) * 1984-07-30 1987-04-07 Hokenson Earl G Apparatus for pressing corrugated web against glue applicator roll
US5230736A (en) * 1989-01-11 1993-07-27 Nordson Corporation Apparatus for applying adhesive to one side of a porous web
US5506005A (en) * 1993-01-13 1996-04-09 Valmet Corporation Method and assembly for preventing air entry between a moving material web and a roll
US5641356A (en) * 1994-09-06 1997-06-24 Minnesota Mining And Manufacturing Company Automated apparatus for coating discrete lengths of web
US6117240A (en) * 1995-01-20 2000-09-12 Ricoh Company, Ltd. Liquid applying apparatus and an image forming substance removing apparatus
CN106476162A (zh) * 2015-09-02 2017-03-08 丰田自动车株式会社 纤维增强复合材料的制造装置及制造方法
CN107876297A (zh) * 2017-11-15 2018-04-06 束长珠 一种冷裱膜用涂胶装置
CN107921465A (zh) * 2015-08-17 2018-04-17 兰达实验室（2012）有限公司 产品计量装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4369584A (en) * 1981-04-16 1983-01-25 W. R. Grace & Co. Preventing air film between web and roller
US4617076A (en) * 1984-09-17 1986-10-14 Westvaco Corporation Glue applicator for single-faced corrugated web
WO1991018733A1 (fr) * 1990-06-01 1991-12-12 A.O. Smith Corporation Procede servant a assembler des tronçons de tubes non ferreux filetes

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1741382A (en) * 1925-01-28 1929-12-31 Stokes & Smith Co Coating apparatus
US2408498A (en) * 1944-04-24 1946-10-01 Mcbee Co Apparatus for cooling and hardening wax carbon coatings
US2494176A (en) * 1947-08-22 1950-01-10 Pneumatic Scale Corp Adhesive applying mechanism
US2674974A (en) * 1953-03-16 1954-04-13 Myron B Gwinn Apparatus for forming spots of adhesive on a moving web
US3113884A (en) * 1958-10-16 1963-12-10 Various Assignees Coating means and method
US3589331A (en) * 1969-04-04 1971-06-29 Westinghouse Electric Corp Apparatus for coating metallic foil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1741382A (en) * 1925-01-28 1929-12-31 Stokes & Smith Co Coating apparatus
US2408498A (en) * 1944-04-24 1946-10-01 Mcbee Co Apparatus for cooling and hardening wax carbon coatings
US2494176A (en) * 1947-08-22 1950-01-10 Pneumatic Scale Corp Adhesive applying mechanism
US2674974A (en) * 1953-03-16 1954-04-13 Myron B Gwinn Apparatus for forming spots of adhesive on a moving web
US3113884A (en) * 1958-10-16 1963-12-10 Various Assignees Coating means and method
US3589331A (en) * 1969-04-04 1971-06-29 Westinghouse Electric Corp Apparatus for coating metallic foil

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096826A (en) * 1976-05-21 1978-06-27 Xerox Corporation Magnetic brush development system for flexible photoreceptors
US4103644A (en) * 1976-09-16 1978-08-01 Michels Norman C Apparatus for coating one side only of strip material
US4172911A (en) * 1976-09-16 1979-10-30 Michels Norman C Method of coating one side only of strip material
US4655163A (en) * 1984-07-30 1987-04-07 Hokenson Earl G Apparatus for pressing corrugated web against glue applicator roll
WO1986006655A1 (fr) * 1985-05-13 1986-11-20 Wallace Knight Limited Appareil et methode de revetement d'un substrat
US5230736A (en) * 1989-01-11 1993-07-27 Nordson Corporation Apparatus for applying adhesive to one side of a porous web
US5506005A (en) * 1993-01-13 1996-04-09 Valmet Corporation Method and assembly for preventing air entry between a moving material web and a roll
US5654031A (en) * 1994-09-06 1997-08-05 Minnesota Mining And Manufacturing Company Web coating apparatus
US5641356A (en) * 1994-09-06 1997-06-24 Minnesota Mining And Manufacturing Company Automated apparatus for coating discrete lengths of web
US6117240A (en) * 1995-01-20 2000-09-12 Ricoh Company, Ltd. Liquid applying apparatus and an image forming substance removing apparatus
CN107921465A (zh) * 2015-08-17 2018-04-17 兰达实验室（2012）有限公司 产品计量装置
US20180200748A1 (en) * 2015-08-17 2018-07-19 Landa Labs (2012) Ltd. Product Metering Device
JP2018529510A (ja) * 2015-08-17 2018-10-11 ランダ ラブズ （２０１２） リミテッド 製品計量装置
US10583453B2 (en) * 2015-08-17 2020-03-10 Landa Labs (2012) Ltd Product metering device
US11305310B2 (en) * 2015-08-17 2022-04-19 Landa Labs (2012) Ltd. Product metering device
CN106476162A (zh) * 2015-09-02 2017-03-08 丰田自动车株式会社 纤维增强复合材料的制造装置及制造方法
CN106476162B (zh) * 2015-09-02 2019-01-15 丰田自动车株式会社 纤维增强复合材料的制造装置及制造方法
CN107876297A (zh) * 2017-11-15 2018-04-06 束长珠 一种冷裱膜用涂胶装置

Also Published As

Publication number Publication date
DE2340177A1 (de) 1974-02-21
GB1430613A (en) 1976-03-31
ES417565A1 (es) 1976-03-01
JPS4935438A (fr) 1974-04-02

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