US3141793A - Apparatus for coating surfaces - Google Patents

Apparatus for coating surfaces Download PDF

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Publication number
US3141793A
US3141793A US54188A US5418860A US3141793A US 3141793 A US3141793 A US 3141793A US 54188 A US54188 A US 54188A US 5418860 A US5418860 A US 5418860A US 3141793 A US3141793 A US 3141793A
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US
United States
Prior art keywords
coating material
nozzle
pump
delivery
coating
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
US54188A
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English (en)
Inventor
Oliphant Keith Meredith
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.)
Research Laboratories of Australia Pty Ltd
Original Assignee
Research Laboratories of Australia Pty 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
Priority claimed from AU52565/59A external-priority patent/AU238986B2/en
Application filed by Research Laboratories of Australia Pty Ltd filed Critical Research Laboratories of Australia Pty Ltd
Application granted granted Critical
Publication of US3141793A publication Critical patent/US3141793A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/02—Arrangements for laying down a uniform charge
    • G03G2215/026—Arrangements for laying down a uniform charge by coronas
    • G03G2215/028—Arrangements for laying down a uniform charge by coronas using pointed electrodes

Definitions

  • coating materials such as paint, paint pigments, ink, lacquer, wax, resins, emulsions of various types, oils, dyes, gums, solutions and suspensions and the like.
  • the surfaces to be coated may be regular or irregular or may be of sheet form or textiles or plastic sheet or board or film.
  • the 'object'of the present invention is to coat the surface with greater uniformity than heretofore possible, and to coat with a greater variety of materials, and to coat with a more effective control over thickness and uniformity of deposition.
  • the invention consists in one embodiment in placing the material to be coated in a fixed position and moving over it a device which causes the coating material to fan out in the form which we shall call a liquid brush so as to large molecules, emulsoids or gas, as opposed to applica tion by an air brush or by a spray gun or doctor blade.
  • the principles underlying the invention are that when a stream of liquid is ejected under pressure from a nozzle it forms a sheet or layer which wets the surface to be coated but in this invention a suction de 'vice is introduced which sucks the excess paint or coating liquid'back into the system for re-circulation and none 'is lost. With a spray gun a mist is formed but in this invention a'bo'dy of liquid is moved under control to the desired site by ejection from one nozzle and suction of the excess immediately back into the system.
  • the paint loss of this method of coating is very low compared to other methods because there is no opportunity for the excess paint or coating material to escape from the painting or coating site.
  • FIG. 1 is a side elevation of one form of the apparatus
  • FIG. 2. is an enlarged sectional view of the apparatus
  • FIG. 3 is a plan of the nozzle arrangement
  • FIG. 4 is a view corresponding to FIG. 1 but showing a modified form of machine.
  • a delivery nozzle 1 is coupled by means of fiexible hose 2 to the outlet 3 of a pump 4, the inlet 5 to thepump'communicating with a tank 6 in which the paint or the like which is to be applied is carried.
  • The'suction'nozzle 8 is similarly connected by means of a flexible hose'9to a'pump 10, but in this case the connection is made to the inlet 11, while the outlet 12 communicates with the tank 6.
  • the nozzles 1 and 8 are provided respectively with control valves 14 and 15 which serve to regulate the flow through the delivery nozzles 1 and 8, and the nozzles themselves are supported from an arcuate bracket 16 carriedon a frame member 17 connected withthe main in a socket 25 but is normally held by.a clamping nut 26 which compresses a resilient member 27 between the nut and the socket 25.
  • the pumps 4 and 19 are driven from a motor 30 through a belt 31, the motor 36 having on it a pulley iiz-engaged by the belt 31, each of the pumps 4 and 10 similarly carrying pulleys 53 and 5-4 respectively engaged bythe belt 31.
  • 35 indicates a'sheet to which the paint or the like is being applied, and it will be seen that the paint or the like is forced on to the sheet through the nozzle 1 but surplus paint or the like is removed through the nozzle 8, the control blade 23 serving to assist in distributing the paint onto the paper 35 or similar substances.
  • the balance required between the delivery from thenozzle 1 and the return through the nozzle 8 can be adjusted to ensure that the correct amount of coating material is applied.
  • the nozzles 1 and 8 are spread at their ends to give the required width of application of a coating material, and obviously this spread can be considerable, or a series of nozzles can be positioned end to end to give the required spread, thereby allowing for instance a paper web such as 35 to traverse'the-apparatus in a continuous manner while applying coating material thereto.
  • FIG. 1 show the direction of flow of the coating material.
  • the path followed by the coating material, from nozzle 1 to nozzle 8 is a curved path that is approximately tangential to the material 35 being coated.
  • the nozzles are maintained at an obtuse anglerelative to each other, as shown in the drawings.
  • a tank 40 contains the coating material, a control valve 41 regulating the flow from the tank to the delivery nozzle 42, the suction nozzle 43 terminating adjacent delivery nozzle as shown and communicating with a pump 44 which is capable of drawing material through the nozzle 43 and discharging it through the pipe 45 back into the tank 40.
  • the pump 44 is driven from the motor 46 through a belt 47 passing around a pulley 48 on the motor shaft 'anda pulley 49 on the pump shaft.
  • the frame 'of this machine is designated 50, while a base 51 serves as asupport for the sheet 52 which is being coated, in this case again the sheet 52. forming .a continuous web that is required on to which the coating material is deposited from the delivery nozzle 42 being drawn off through the suction nozzle 43 by the pump 44 and delivered back to the tank 46.
  • control blade corresponding to the blade 23 is not used, but obviously such a blade could again be positioned if required.
  • the essential feature of this invention consists in the provision of a delivery nozzle through which the coating material is applied to a sheet or the like, and the adjacent positioning of a suction nozzle so that surplus coating material is removed from the sheet after application.
  • the device can continue to function when no sheet is positioned adjacent to the delivery nozzle, the material simply then discharging through the delivery nozzle and again being drawn back through the suction nozzle to maintain a continuous circulation.
  • the nozzles are arranged at an angle to each other to cause the stream of the coating material to be bent and thus to give it access to the sheet or the like which is to be coated, or alternatively a member such as the control blade must be used which ensures that the material follows a curved path which will ensure that it can be applied to the sheet or the like outside of the plane of the nozzles and can again be withdrawn back into the suction nozzle when surplus coating material is present.
  • the deposition depends in the first instance in the full wetting of the surface by the paint or liquid and the instant removal of the excess by suction so as to given an extremely uniform paint or liquid film on the surface to be coated.
  • the shape and size of the liquid brush may be controlled by the rate of ejection of the coating material in relation to the rate of return suction, by the size and shape of the hydraulic pump and by the gap between the nozzles and the surface to be coated. These will vary according to the viscosity of the paint or other liquid used.
  • the materials used for carrying out the invention can of course be widely varied and the coating materials used for coating can include paints and the like, liquid developers of electrostatic images and the like.
  • coating materials which can be applied by use of the invention are as follows:
  • Electrophotographic Coating Grms Zinc oxide 100 Resin 70 Cobalt naphthenate 0.7 Lead naphthenate 1.4 Toluene 200 This coating composition was milled in a ball mill for 24 hours and used in the coating apparatus.
  • Resin Emulsion Type Surface Coating Standard polyvinylacetate paint as supplied for interior decorating was used with the following nozzle openings, pressure side 7 x l", suction side x 1", gravity feed on pressure side in downhand position, otherwise positive pressure 15 pounds per square inch, suction 5" water gauge in excess.
  • Means for coating surfaces comprising a delivery nozzle for the coating material, a suction nozzle to remove excess coating material, and means to maintain the said nozzles in a spaced relationship and at an obtuse angle relative to each other to cause the coating material to follow a curved path between the delivery nozzle and the suction nozzle into the plane of the object being coated that is approximately tangential to the surface of the object being coated.
  • Means for coating surfaces comprising a delivery nozzle for delivering the coating material to a surface along a predetermined delivery path, a suction nozzle to remove excess coating material from the surface along a predetermined removal path, means to hold the said nozzles in spaced angular relationship with the delivery and removal paths oppositely inclined with respect to the normal to said surface with their openings in proximity to each other on one side of said surface, a tank for the coating material, means coupling the said tank to the said delivery nozzle, a flow control valve in said coupling means, a suction pump, means coupling the pump inlet to the said suction nozzle, means coupling the pump outlet to the said tank, and means to drive the said pump.
  • Means for coating surfaces comprising a delivery nozzle for delivering the coating material to a surface along a predetermined delivery path, a suction nozzle to remove excess coating material from the surface along a predetermined removal path, means to hold the said nozzles in spaced relationship with the delivery and removal paths oppositely inclined with respect to the normal to said surface with their openings in proximity to each other on one side of said surface, adjustment means on the said holding means to allow angle and distance of the nozzle openings to be adjusted, a tank for the coating material, means coupling the said tank to the said delivery nozzle, a flow control valve in said coupling means, a suction pump, means coupling the pump inlet to the said suction nozzle, means coupling the pump outlet to the said tank, and means to drive the said pump.
  • Means for coating surfaces comprising a delivery nozzle for the coating material, a suction nozzle to remove excess coating material, means to hold the said nozzles in spaced angular relationship with their openings 1n proximity to each other, a tank for the coating material, a delivery pump, means coupling the pump inlet to the said tank, means coupling the pump outlet to the said delivery nozzle, a suction pump, means coupling the pump inlet to the said suction nozzle, means coupling the pump outlet to the said tank, means to drive the said pumps, and flow control valves in the means coupling the respective pumps to their associated nozzles.
  • Means for coating surfaces comprising a delivery nozzle for the coating material, a suction nozzle to remove excess coating material, means to hold the said nozzles in spaced relationship with their openings in proximity to each other, adjustment means on the said holding means to allow angle and distance of the nozzle openings to be adjusted, a tank for the coating material, a delivery pump, means coupling the pump inlet to the said tank, means coupling the pump outlet to the said delivery nozzle, a suction pump, means coupling the pump inlet to the said suction nozzle, means coupling the pump outlet to the said tank, means to drive the said pumps, and flow control valves in the means coupling the repsective pumps to their associated nozzles.
  • Means for coating surfaces comprising a delivery nozzle for delivering the coating material to a surface along a predetermined delivery path, a suction nozzle to remove excess coating material from the surface along a predetermined removal path, means to hold the said nozzles in spaced angular relationship with the delivery and removal paths oppositely inclined with respect to the normal to said surface with their openings in proximity to each other on one side of said surface, a blade disposed between the two said nozzles in the path of the coating material, a tank for the coating material, means coupling said tank to the said delivery nozzle, a flow control valve in said coupling means, a suction pump, means coupling the pump inlet to the said suction nozzle, means coupling the pump outlet to the said tank, and means to drive the said pump.
  • Means for coating surfaces comprising a delivery nozzle for delivering the coating material to a surface along a predetermined delivery path, a suction nozzle to remove excess coating material from the surface along a predetermined removal path, means to hold the said nozzles in spaced relationship with the delivery and removal paths oppositely inclined with respect to the normal to said surface with their openings in proximity to each other on one side of said surface, adjustment means on the said holding means to allow angle and distance of the nozzle openings to be adjusted, an adjustable blade between the two said nozzles in the path of the coating material, a tank for the coating material, means coupling 6 the said tank to the said delivery nozzle, a flow control valve in said coupling means, a suction pump, means coupling the pump inlet to the said suction nozzle, means coupling the pump outlet to the said tank, and means to drive the said pump.
  • Means for coating surfaces comprising a delivery nozzle for the coating material, a suction nozzle to remove excess coating material, means to hold the said nozzles in spaced angular relationship with their openings in proximity to each other, an adjustable blade between the two said nozzles in the path of the coating material, a tank for the coating material, a delivery pump, means coupling the pump inlet to the said tank, means coupling the pump outlet to the said delivery nozzle, a suction pump, means coupling the pump inlet to the said suction nozzle, means coupling the pump outlet to the said tank, means to drive the said pumps, and flow control valves in the means coupling the respective pumps to their associated nozzles.
  • Means for coating surfaces comprising a delivery nozzle for the coating material, a suction nozzle to remove excess coating material, means to hold the said nozzles in spaced relationship with their openings in proximity to each other, adjustment means on the said holding means to allow angle and distance of the nozzle openings to be adjusted, an adjustable blade between the two said nozzles in the path of the coating material, a tank for the coating material, a delivery pump, means coupling the pump inlet to the said tank, means coupling the pump outlet to the said delivery nozzle, a suction pump, means coupling the pump inlet to the said suction nozzle, means coupling the pump outlet to the said tank, means to drive the said pumps, and flow control valves in the means coupling the respective pumps to their associated nozzles.

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  • Coating Apparatus (AREA)
  • Paper (AREA)
US54188A 1959-09-09 1960-09-06 Apparatus for coating surfaces Expired - Lifetime US3141793A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU52565/59A AU238986B2 (en) 1959-09-09 Method and means for coating surfaces
AU50960X 1960-09-05

Publications (1)

Publication Number Publication Date
US3141793A true US3141793A (en) 1964-07-21

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US54188A Expired - Lifetime US3141793A (en) 1959-09-09 1960-09-06 Apparatus for coating surfaces

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US (1) US3141793A (enrdf_load_stackoverflow)
CH (1) CH365978A (enrdf_load_stackoverflow)
FR (1) FR1274544A (enrdf_load_stackoverflow)
GB (1) GB953704A (enrdf_load_stackoverflow)
NL (1) NL255695A (enrdf_load_stackoverflow)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411937A (en) * 1965-03-01 1968-11-19 Interchem Corp Method of liquid electrostatic developing
US3411936A (en) * 1965-03-01 1968-11-19 Interchem Corp Developing electrostatic images with a liquid developer containing tetraphenyl tin or zirconyl 2-ethylhexoate
DE1289767B (de) * 1964-12-12 1969-02-20 Henkel & Cie Gmbh Klebstoffauftragvorrichtung fuer auf einer ruhenden Unterlage bewegte Werkstuecke
US3461843A (en) * 1967-11-21 1969-08-19 Stanford Research Inst Toner application apparatus
US3654896A (en) * 1965-08-21 1972-04-11 Kalle Ag Apparatus for developing electrostatic images
US3827397A (en) * 1971-06-29 1974-08-06 F Hebberling Apparatus for coating moving filamentary strands
US3844820A (en) * 1972-08-09 1974-10-29 Bethlehem Steel Corp Method of applying a coating to both sides of a moving strip
US3900866A (en) * 1972-07-10 1975-08-19 Leeds & Northrup Co Apparatus for and method of graphical recording
US5104696A (en) * 1988-09-07 1992-04-14 Veitscher Magnesitwerkeactien-Gesellschaft Process and device for intermittenly spraying a pasty composition
US5536315A (en) * 1994-07-01 1996-07-16 Fanuc Robotics North America, Inc. Method and system for spraying material in a spray pattern having a variable form and collecting excess material
US5871584A (en) * 1994-08-03 1999-02-16 Tokyo Electron Limited Processing apparatus and processing method
US20080282896A1 (en) * 2007-05-17 2008-11-20 Electrical & Electronics Ltd. Beverage brewing apparatus with pump dispensing system
USRE42420E1 (en) 1996-11-29 2011-06-07 Alps Electric Co., Ltd. Liquid feed nozzle, wet treatment apparatus and wet treatment method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1338624A (en) * 1918-12-05 1920-04-27 Otto A Heppes Process of making prepared roofing
US1728043A (en) * 1928-03-21 1929-09-10 Guardian Trust Company Of Detr Painting instrument
US1989800A (en) * 1932-08-24 1935-02-05 Westinghouse Lamp Co Mount gettering device
US2471330A (en) * 1947-02-17 1949-05-24 Paper Chemistry Inst Method of continuously coating porous sheets
US2899339A (en) * 1957-08-23 1959-08-11 Foating to a moving web

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1338624A (en) * 1918-12-05 1920-04-27 Otto A Heppes Process of making prepared roofing
US1728043A (en) * 1928-03-21 1929-09-10 Guardian Trust Company Of Detr Painting instrument
US1989800A (en) * 1932-08-24 1935-02-05 Westinghouse Lamp Co Mount gettering device
US2471330A (en) * 1947-02-17 1949-05-24 Paper Chemistry Inst Method of continuously coating porous sheets
US2899339A (en) * 1957-08-23 1959-08-11 Foating to a moving web

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1289767B (de) * 1964-12-12 1969-02-20 Henkel & Cie Gmbh Klebstoffauftragvorrichtung fuer auf einer ruhenden Unterlage bewegte Werkstuecke
US3411936A (en) * 1965-03-01 1968-11-19 Interchem Corp Developing electrostatic images with a liquid developer containing tetraphenyl tin or zirconyl 2-ethylhexoate
US3411937A (en) * 1965-03-01 1968-11-19 Interchem Corp Method of liquid electrostatic developing
US3654896A (en) * 1965-08-21 1972-04-11 Kalle Ag Apparatus for developing electrostatic images
US3461843A (en) * 1967-11-21 1969-08-19 Stanford Research Inst Toner application apparatus
US3827397A (en) * 1971-06-29 1974-08-06 F Hebberling Apparatus for coating moving filamentary strands
US3900866A (en) * 1972-07-10 1975-08-19 Leeds & Northrup Co Apparatus for and method of graphical recording
US3844820A (en) * 1972-08-09 1974-10-29 Bethlehem Steel Corp Method of applying a coating to both sides of a moving strip
US5104696A (en) * 1988-09-07 1992-04-14 Veitscher Magnesitwerkeactien-Gesellschaft Process and device for intermittenly spraying a pasty composition
US5536315A (en) * 1994-07-01 1996-07-16 Fanuc Robotics North America, Inc. Method and system for spraying material in a spray pattern having a variable form and collecting excess material
US5871584A (en) * 1994-08-03 1999-02-16 Tokyo Electron Limited Processing apparatus and processing method
USRE42420E1 (en) 1996-11-29 2011-06-07 Alps Electric Co., Ltd. Liquid feed nozzle, wet treatment apparatus and wet treatment method
USRE42566E1 (en) * 1997-07-24 2011-07-26 Alps Electric Co., Ltd. Liquid feed nozzle, wet treatment, apparatus and wet treatment method
US20080282896A1 (en) * 2007-05-17 2008-11-20 Electrical & Electronics Ltd. Beverage brewing apparatus with pump dispensing system
US9038530B2 (en) * 2007-05-17 2015-05-26 Ene Holdings Ltd Beverage brewing apparatus with pump dispensing system

Also Published As

Publication number Publication date
CH365978A (fr) 1962-11-30
NL255695A (enrdf_load_stackoverflow)
GB953704A (en) 1964-03-25
FR1274544A (fr) 1961-10-27

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