US3792682A - Apparatus for coating - Google Patents

Apparatus for coating Download PDF

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Publication number
US3792682A
US3792682A US00232007A US3792682DA US3792682A US 3792682 A US3792682 A US 3792682A US 00232007 A US00232007 A US 00232007A US 3792682D A US3792682D A US 3792682DA US 3792682 A US3792682 A US 3792682A
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Prior art keywords
chamber
base plate
block
pores
coating
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US00232007A
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Raymond Harold Phipps
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Robinson Waxed Paper Co Ltd
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Robinson Waxed Paper Co Ltd
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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
    • 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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/027—Ink rail devices for inking ink rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/08—Ducts, containers, supply or metering devices with ink ejecting means, e.g. pumps, nozzles
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H5/00—Special paper or cardboard not otherwise provided for
    • D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating

Definitions

  • This invention relates to the application of coating materials in a fluid state to a receptor surface in the form of a moving web and is concerned with the method and apparatus of the kind in which fluid is applied to the surface through a porous member.
  • an apparatus for applying coating material in a fluid state to a receptor surface comprising a member drilled to provide pores of uniform size uniformly distributed in the member to provide a porous member, and means for dispensing fluid through the said member to the receptor surface.
  • the block is formed in a chamber or recess provided in a coating head which includes a base plate at the bottom of the chamber, and said plate being drilled with the said block to provide the desired porosity.
  • the block may be made of metal loaded epoxy resin.
  • the moving web is held in contact with the coating head by an air supported membrane.
  • FIG. 1 is aperspective view of a coating device for applying a coating to a moving web
  • FIG. 2 is an end view of the coating device shown in FIG. 1,
  • FIG. 3 is a detail view of the porous member shown in FIG. 2, and
  • FIG. 4 is a perspective view of the device used for air supporting the membrane.
  • the coating device comprises an applicator head generally indicated at 2 which is suspended by means of arms 4 mounted on brackets 6 of a crossbar 8 of the frame 10 of the machine above the surface of a moving web 12 to be coated.
  • the applicator head 2 is provided with adjustable air-pressure control means 14 for controlling the loading of the head 2 from the regulator 16. Beneath the web 12 is positioned means for maintaining the web 12 in uniform contact with the applicator head 2 comprising an air-supported membrane 18 in the form of a belt made for example of fabric reinforced silicone rubber 0. l4 thick passing over rollers 20 and 21, the roller 21 being the driving roller.
  • the bottom roller 20 is adjustable to control tension.
  • the belt 18 is tendency driven by means of roller 21 which is coupled to the main drive of the coating machine through a magnetic particle coupling (not shown) so as to control the drag of the belt on the supported web.
  • a fourth roller 22 is a roll which can either be kept at chill temperature or heated if required by means of cooling or heating liquid or gas so as to maintain the belt at any temperature suitable for the particular coating conditions.
  • the rollers 20 are mounted on a framework 24 attached to the frame 10 of the machine.
  • air supporting means 26 for holding the belt 18 in contact with web 12 by which means the web 12 is held in contact with the applicator head 2.
  • the air supporting means 26 takes the form of a box, the details of which are described later with reference to FIGS. 2 and 4.
  • the applicator head 2 is built to provide an elongate coating chamber 30 having three inlets 32 in the top surface.
  • the chamber 30 contains a porous block 34 and a filter 36 is arranged above the block in the chamber 30.
  • the bottom wall of the chamber 30 is formed integrally with the walls 38 and provides a base plate 40 which is in contact with the web to be coated.
  • Other features contained in the head 2 are L-shaped heaters 42 for maintaining the coating at the correct temperature and a smoothing bar assembly 44 incorporating two downwardly projecting smoothing bars 46.
  • the block 34 is made by pouring metal loaded epoxy resin into the chamber 30 where it is cured in situ in the bottom portion of the chamber 30.
  • the base plate 40 and block 34 together form the porous member which is made by drilling a plurality of holes 48 through the plate 40 and the block 34.
  • the diameter of the drilled holes or pores 48 and the distance between said holes and the thickness of the block are predetermined depending upon the material which is to be applied to the web so as to provide a calibrated impedance to flow.
  • a porous member may consist of a plate 40 1/16 inches in thickness and a block 34 of epoxy resin 3/16 inch in thickness.
  • holes or pores 48 are drilled to provide rows 1/16 inch apart and the pores are 0.02 inch in diameter at 1/l6 inch centres apart, the pores of one row being staggered in relation to those of the next row.
  • FIG. 4 shows in detail the means for air supporting the belt 18.
  • a box 50 fixed under the upper run of the belt 18 is divided into compartments 51 and a top plate 52 is bolted to the body of the box.
  • the top plate 52 is perforated in zones.
  • Zone a provides a row ofjets under a roller 19 maintaining the web 12 in contact with the belt 18 before the web 12 reaches the coating head 2.
  • Zone 17 provides a double row of jets under the coating head 2 and zone 0 provides a double row ofjets under the two smoothing bars 46.
  • the holes are of diameter l/32 at 3/32 inch centres.
  • Air is supplied under pressure to the box the compartments 51 being individually fed through apertures 53 with an adjustable air supply. The air emerges from the top plate 52 through the rows of apertures a, b and c as jets of air.
  • the epoxy resin block 34 can be replaced with a block of sintered material or multi-layered mesh but there should be a complete seal between its edges and the walls of the chamber 30.
  • the air supported membrane 18 may have a pat terned surface.
  • the pattern can take the form of recesses for applying localised heavy weight of coating since the weight of coating emerging from the head 2 is a function of the force of pressure on the web 12 as supported by the belt 18 against the coating head 2.
  • a dual coating head may be provided for applying fast curing materials, i.e. short pot life two part adhesives and coatings by feeding the components separately and mixing within the head.
  • the apparatus according to the invention can also be used for coating webs with for example foamed polyurethane by depositing the polymer and the foaming agent together on the web so that it foams in situ after coating.
  • the apparatus can also be combined with a laminating nip for applying a further layer of material to the web 12.
  • Apparatus for applying coating material in a fluid state to a moving web which comprises:
  • said chamber being defined by side walls and a substantially flat base plate, the lower portion of said chamber being filled with a block member formed in place by pouring a hard setting material onto said base plate, said base plate and said block material being drilled simultaneously to provide therethrough a plurality of uniformly distributed, perfectly aligned pores of uniform bore, said pores providing direct fluid communication from said chamber to the moving web;
  • said means for disposing the web in a flat condition against said base plate, said means comprising a moving belt bearing on the underside of the moving web and a plurality offluid jets acting on the underside of said belt.
  • Apparatus according to claim 1 wherein said fluid jets comprise jets of pressurized air, and wherein said jets are directed against the underside ofsaid belt at locations corresponding to the nip points of the coating apparatus.

Abstract

An apparatus is described for applying coating material in a fluid state to a receptor surface (in the form of a moving web) through a porous member having a large number of fine drillings. The porous member may be a block of epoxy resin and a base plate of a chamber containing the epoxy resin block.

Description

O United States Patent 1191 1111 3,792,682
Phipps 1451 Feb. 19, 1974 [54] APPARATUS FOR COATING 2,349,256 5 1944 Evans 118 411 1751 11116111011 Raymond Harold Phipps, Bristol, 2 23332? 311332 3222155311111 131:; 1131115 England 2,761,418 9/1956 Russell 1 118/410 [731 Assignee The Waxed 1 333???? $1322 $251 113/313 Company England 3:509:849 5/1970 Blair 6161:: IIII 118 411 x [22] Fil d; M 6, 1972 3,589,331 6/1971 Westervelt 118/62 [21] 232,007 FOREIGN PATENTS OR APPLICATIONS Related U.S. Application Data 447,219 5/1936 Great Britain 118/411 [63] Continuation-impart of Ser. No. 873,053, Oct. 31,
1969, abandoned.
Przmary Examiner-John P. McIntosh [30] Foreign Application Priority Data Dec. 1, 1968 Great Britain 51829/68 June 16, 1969 Great Britain 30484/69 {57] ABSTRACT An apparatus is described for applying coating mate- 118/62 8/41 rial in a fluid state to a receptor surface (in the form n c of a moving web) through a porous member having a [58] Field of Search 118/410, 411, 415, 401, 62 large number of fine drillings The porous member may be a block of epoxy resin and a base plate of a [56] References Clted chamber containing the epoxy resin block.
UNITED STATES PATENTS 1,613,521 1/1927 Martin 118/411 X 5 Claims, 4 Drawing Figures sum 20F g PATENIEB FEB 1 91974 APPARATUS FOR COATING This application is a continuation-in-part of my copending application Ser. No. 873,053, filed Oct. 31, 1969, now abandoned.
This invention relates to the application of coating materials in a fluid state to a receptor surface in the form of a moving web and is concerned with the method and apparatus of the kind in which fluid is applied to the surface through a porous member.
According to this invention there is provided an apparatus for applying coating material in a fluid state to a receptor surface comprising a member drilled to provide pores of uniform size uniformly distributed in the member to provide a porous member, and means for dispensing fluid through the said member to the receptor surface. Preferably the block is formed in a chamber or recess provided in a coating head which includes a base plate at the bottom of the chamber, and said plate being drilled with the said block to provide the desired porosity. The block may be made of metal loaded epoxy resin.
Preferably the moving web is held in contact with the coating head by an air supported membrane.
One form of apparatus for carrying out the invention is illustrated in the accompanying drawing, wherein:
FIG. 1 is aperspective view of a coating device for applying a coating to a moving web,
FIG. 2 is an end view of the coating device shown in FIG. 1,
FIG. 3 is a detail view of the porous member shown in FIG. 2, and
FIG. 4 is a perspective view of the device used for air supporting the membrane.
Referring to the drawing and first to FIG. 1. The coating device comprises an applicator head generally indicated at 2 which is suspended by means of arms 4 mounted on brackets 6 of a crossbar 8 of the frame 10 of the machine above the surface of a moving web 12 to be coated. The applicator head 2 is provided with adjustable air-pressure control means 14 for controlling the loading of the head 2 from the regulator 16. Beneath the web 12 is positioned means for maintaining the web 12 in uniform contact with the applicator head 2 comprising an air-supported membrane 18 in the form of a belt made for example of fabric reinforced silicone rubber 0. l4 thick passing over rollers 20 and 21, the roller 21 being the driving roller. The bottom roller 20 is adjustable to control tension. The belt 18 is tendency driven by means of roller 21 which is coupled to the main drive of the coating machine through a magnetic particle coupling (not shown) so as to control the drag of the belt on the supported web. A fourth roller 22 is a roll which can either be kept at chill temperature or heated if required by means of cooling or heating liquid or gas so as to maintain the belt at any temperature suitable for the particular coating conditions. The rollers 20 are mounted on a framework 24 attached to the frame 10 of the machine.
Under the upper run of the belt 18 there is provided air supporting means 26 for holding the belt 18 in contact with web 12 by which means the web 12 is held in contact with the applicator head 2. The air supporting means 26 takes the form of a box, the details of which are described later with reference to FIGS. 2 and 4.
The applicator head 2 is built to provide an elongate coating chamber 30 having three inlets 32 in the top surface. The chamber 30 contains a porous block 34 and a filter 36 is arranged above the block in the chamber 30. The bottom wall of the chamber 30 is formed integrally with the walls 38 and provides a base plate 40 which is in contact with the web to be coated. Other features contained in the head 2 are L-shaped heaters 42 for maintaining the coating at the correct temperature and a smoothing bar assembly 44 incorporating two downwardly projecting smoothing bars 46. The block 34 is made by pouring metal loaded epoxy resin into the chamber 30 where it is cured in situ in the bottom portion of the chamber 30. The base plate 40 and block 34 together form the porous member which is made by drilling a plurality of holes 48 through the plate 40 and the block 34. The diameter of the drilled holes or pores 48 and the distance between said holes and the thickness of the block are predetermined depending upon the material which is to be applied to the web so as to provide a calibrated impedance to flow. For example a porous member may consist of a plate 40 1/16 inches in thickness and a block 34 of epoxy resin 3/16 inch in thickness. In this case holes or pores 48 are drilled to provide rows 1/16 inch apart and the pores are 0.02 inch in diameter at 1/l6 inch centres apart, the pores of one row being staggered in relation to those of the next row.
FIG. 4 shows in detail the means for air supporting the belt 18. A box 50 fixed under the upper run of the belt 18 is divided into compartments 51 and a top plate 52 is bolted to the body of the box. The top plate 52 is perforated in zones. Zone a provides a row ofjets under a roller 19 maintaining the web 12 in contact with the belt 18 before the web 12 reaches the coating head 2. Zone 17 provides a double row of jets under the coating head 2 and zone 0 provides a double row ofjets under the two smoothing bars 46. Conveniently the holes are of diameter l/32 at 3/32 inch centres. Air is supplied under pressure to the box the compartments 51 being individually fed through apertures 53 with an adjustable air supply. The air emerges from the top plate 52 through the rows of apertures a, b and c as jets of air.
The epoxy resin block 34 can be replaced with a block of sintered material or multi-layered mesh but there should be a complete seal between its edges and the walls of the chamber 30.
The air supported membrane 18 may have a pat terned surface. The pattern can take the form of recesses for applying localised heavy weight of coating since the weight of coating emerging from the head 2 is a function of the force of pressure on the web 12 as supported by the belt 18 against the coating head 2.
If desired a dual coating head may be provided for applying fast curing materials, i.e. short pot life two part adhesives and coatings by feeding the components separately and mixing within the head.
The apparatus according to the invention can also be used for coating webs with for example foamed polyurethane by depositing the polymer and the foaming agent together on the web so that it foams in situ after coating.
The apparatus can also be combined with a laminating nip for applying a further layer of material to the web 12.
I claim:
1. Apparatus for applying coating material in a fluid state to a moving web, which comprises:
a chamber for receiving the fluid coating material,
said chamber being defined by side walls and a substantially flat base plate, the lower portion of said chamber being filled with a block member formed in place by pouring a hard setting material onto said base plate, said base plate and said block material being drilled simultaneously to provide therethrough a plurality of uniformly distributed, perfectly aligned pores of uniform bore, said pores providing direct fluid communication from said chamber to the moving web;
means for dispensing coating material under pressure through said pores and onto the moving web; and
means for disposing the web in a flat condition against said base plate, said means comprising a moving belt bearing on the underside of the moving web and a plurality offluid jets acting on the underside of said belt.
2. Apparatus according to claim 1 wherein said block member is formed in said chamber from a resinous material that is poured into said chamber and cured in Sltu.
3. Apparatus according to claim 1 wherein the said block is made of metal loaded epoxy resin.
4. Apparatus according to claim 3 wherein thediameter of the pores is of the order of 0.02 inch.
5. Apparatus according to claim 1, wherein said fluid jets comprise jets of pressurized air, and wherein said jets are directed against the underside ofsaid belt at locations corresponding to the nip points of the coating apparatus.

Claims (5)

1. Apparatus for applying coating material in a fluid state to a moving web, which comprises: a chamber for receiving the fluid coating material, said chamber being defined by side walls and a substantially flat base plate, the lower portion of said chamber being filLed with a block member formed in place by pouring a hard setting material onto said base plate, said base plate and said block material being drilled simultaneously to provide therethrough a plurality of uniformly distributed, perfectly aligned pores of uniform bore, said pores providing direct fluid communication from said chamber to the moving web; means for dispensing coating material under pressure through said pores and onto the moving web; and means for disposing the web in a flat condition against said base plate, said means comprising a moving belt bearing on the underside of the moving web and a plurality of fluid jets acting on the underside of said belt.
2. Apparatus according to claim 1 wherein said block member is formed in said chamber from a resinous material that is poured into said chamber and cured in situ.
3. Apparatus according to claim 1 wherein the said block is made of metal loaded epoxy resin.
4. Apparatus according to claim 3 wherein the diameter of the pores is of the order of 0.02 inch.
5. Apparatus according to claim 1, wherein said fluid jets comprise jets of pressurized air, and wherein said jets are directed against the underside of said belt at locations corresponding to the nip points of the coating apparatus.
US00232007A 1968-11-01 1972-03-06 Apparatus for coating Expired - Lifetime US3792682A (en)

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GB5182968A GB1288041A (en) 1968-11-01 1968-11-01
GB3048469 1969-06-16

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US (1) US3792682A (en)
CH (1) CH522514A (en)
DE (1) DE1954906A1 (en)
DK (1) DK129909B (en)
ES (1) ES373458A1 (en)
FR (1) FR2022379A1 (en)
GB (1) GB1288041A (en)
NL (1) NL6916467A (en)
SE (1) SE385195B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981764A (en) * 1974-08-12 1976-09-21 Hitachi, Ltd. III-V Compound semi-conductor crystal growth from a liquid phase on a substract including filtering liquid phase
US4246335A (en) * 1979-04-09 1981-01-20 W. R. Grace & Co. Shape dispensing of photopolymer
WO1990011136A1 (en) * 1989-03-28 1990-10-04 Beloit Corporation A coater apparatus
CN106824683A (en) * 2016-12-11 2017-06-13 天津潜宇塑胶制品有限公司 Coating waste water produces wire body
US10537912B2 (en) * 2014-07-03 2020-01-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Module, system and method for applying a viscous medium to a surface and method for producing the module

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3433315A1 (en) * 1984-09-11 1986-03-13 Wolters, Peter, 2370 Rendsburg Apparatus for the coating of spinning cylinders
ATE55286T1 (en) * 1985-02-28 1990-08-15 Helling Kg Kunststoffwerk Hans DEVICE FOR APPLYING A PRIMER TO A PLASTIC PROFILE OR THE LIKE.
FR2633900B1 (en) * 1988-07-05 1991-01-11 Holweg International BAG BACKGROUND DEVICE
US5354379A (en) * 1993-02-08 1994-10-11 Minnesota Mining And Manufacturing Company Apparatus for applying a protective coating to a film strip
EP0611606B1 (en) * 1993-02-17 1998-12-23 Idemitsu Petrochemical Co. Ltd. Pretreating apparatus for adhesion of plastic sheet materials

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US346869A (en) * 1886-08-03 Apparatus for waxing paper
US1613521A (en) * 1925-09-18 1927-01-04 American Shoe Machinery Compan Pressure tempering
GB447219A (en) * 1935-02-16 1936-05-14 Alfred James Kitcat Improvements in glueing-apparatus particularly for book binding
US2309981A (en) * 1939-11-30 1943-02-02 Us Rubber Co Apparatus for coating sheet material
US2349256A (en) * 1941-08-14 1944-05-23 Coreve Corp Machine for continuously coating and/or permeating sheets
US2761418A (en) * 1955-02-23 1956-09-04 Eastman Kodak Co Multiple coating apparatus
US3083685A (en) * 1960-06-27 1963-04-02 Air Reduction Paper coating apparatus
US3285225A (en) * 1963-05-02 1966-11-15 Beloit Corp Coating applicator
US3509849A (en) * 1965-08-21 1970-05-05 George S Blair Molten adhesive dispensing apparatus
US3589331A (en) * 1969-04-04 1971-06-29 Westinghouse Electric Corp Apparatus for coating metallic foil

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US346869A (en) * 1886-08-03 Apparatus for waxing paper
US1613521A (en) * 1925-09-18 1927-01-04 American Shoe Machinery Compan Pressure tempering
GB447219A (en) * 1935-02-16 1936-05-14 Alfred James Kitcat Improvements in glueing-apparatus particularly for book binding
US2309981A (en) * 1939-11-30 1943-02-02 Us Rubber Co Apparatus for coating sheet material
US2349256A (en) * 1941-08-14 1944-05-23 Coreve Corp Machine for continuously coating and/or permeating sheets
US2761418A (en) * 1955-02-23 1956-09-04 Eastman Kodak Co Multiple coating apparatus
US3083685A (en) * 1960-06-27 1963-04-02 Air Reduction Paper coating apparatus
US3285225A (en) * 1963-05-02 1966-11-15 Beloit Corp Coating applicator
US3509849A (en) * 1965-08-21 1970-05-05 George S Blair Molten adhesive dispensing apparatus
US3589331A (en) * 1969-04-04 1971-06-29 Westinghouse Electric Corp Apparatus for coating metallic foil

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3981764A (en) * 1974-08-12 1976-09-21 Hitachi, Ltd. III-V Compound semi-conductor crystal growth from a liquid phase on a substract including filtering liquid phase
US4246335A (en) * 1979-04-09 1981-01-20 W. R. Grace & Co. Shape dispensing of photopolymer
WO1990011136A1 (en) * 1989-03-28 1990-10-04 Beloit Corporation A coater apparatus
US4961968A (en) * 1989-03-28 1990-10-09 Beloit Corporation Short dwell coater apparatus with backing blanket disposed between blade and guide roll
US10537912B2 (en) * 2014-07-03 2020-01-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Module, system and method for applying a viscous medium to a surface and method for producing the module
CN106824683A (en) * 2016-12-11 2017-06-13 天津潜宇塑胶制品有限公司 Coating waste water produces wire body

Also Published As

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DK129909C (en) 1975-06-02
NL6916467A (en) 1970-05-06
ES373458A1 (en) 1972-06-01
FR2022379A1 (en) 1970-07-31
DK129909B (en) 1974-12-02
CH522514A (en) 1972-06-30
DE1954906A1 (en) 1970-06-18
GB1288041A (en) 1972-09-06
SE385195B (en) 1976-06-14

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