US3726711A - Method and apparatus for coating metal can bodies - Google Patents

Method and apparatus for coating metal can bodies Download PDF

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Publication number
US3726711A
US3726711A US00076168A US3726711DA US3726711A US 3726711 A US3726711 A US 3726711A US 00076168 A US00076168 A US 00076168A US 3726711D A US3726711D A US 3726711DA US 3726711 A US3726711 A US 3726711A
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wax
spray
bodies
interior
nozzle
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US00076168A
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E Hogstrom
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Nordson Corp
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Nordson Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
    • B05B13/0609—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being automatically fed to, or removed from, the machine
    • 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
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
    • B05D7/227—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes of containers, cans or the like

Definitions

  • This invention relates to the manufacture of metal cans and more particularly to the coating of the interior of the cans to prevent the interior metal surface from contacting and contaminating the packaged contents of the cans.
  • Metal cans are made by either one of two processes.
  • One process, the two piece can process involves forming a drawn cup from a cylindrical slug of metal and then deep drawing the cup to a can configuration.
  • the other process, the three piece process involves forming a cylindrical can body from a sheet of metal and then attaching two lids or ends to the opposite ends of the body.
  • the invention of this application is applicable to cans made by both processes.
  • a protective coating generally vinyl lacquers although numerous other materials, as for example, resins, lacquers, waxes and paints have been applied for this same purpose, i.e., to afford protection of the content of the can against contamination by the metal.
  • a protective coating generally vinyl lacquers although numerous other materials, as for example, resins, lacquers, waxes and paints have been applied for this same purpose, i.e., to afford protection of the content of the can against contamination by the metal.
  • a tasteless and odorless protective coating material to the interior of the can.
  • This protective material over the interior of the can must be continuous and uniform throughout the entire interior surface.
  • the continuity requirements are absolute. There can be no pin holes, scratches, cracks or imperfections of any kind in the surface coating since any such minor imperfection will, during the shelf life of the can, result in deterioration of the can contents.
  • the protective coating was a parafiin wax. It was applied by melting the parafiin, pouring it into the can and then swishing it around the interior of the can until the interior surface was completely covered. The excess melted wax was then poured out of the can. Manifestly, this was a crude and imperfect coating technique. It was abandoned in favor of varnishes and lacquer which could be applied at higher rates by spraying techniques.
  • Bakelite and other phenolic resins became available, they were widely used in the form of a spray which was baked or cured on the interior surface. The phenolics were in turn replaced by vinyl resins and vinyl lacquers which are still widely used today. Generally, the vinyl lacquer is sprayed onto the interior of the can and then heated or cured to drive a solvent from the sprayed material.
  • wax is intended to include wax and waxlike materials including paraflin wax of the type commonly used in home canning, microcrystalline waxes, or combinations of the two formulated with or without additives to obtain particular hardening, melting, viscosity or other characteristics.
  • 100% solids wax or 100% solids material is intended to define a material which is 100% solids at room temperature and which may be converted to a liquid, generally by the application of heat so that it may be sprayed in liquid form without the addition of any solvent.
  • wax is being used commercially to coat the interior rims of can ends. It is applied to afford added protection over the rim of the can.
  • Can coatings are particularly prone to fail at the rim because of cracks which develop during forming or shaping of the ends or because of scratches or imperfections which result from the high speed as sembly of the ends onto the bodies and the subsequent crimping of the two together.
  • a lid with the cured wax applied around the rim may then be slapped onto the end of a can body at high speed and with much less danger of scratching or damaging the protective lacquer applied beneath the wax.
  • the wax acts as a lubricant which facilitates sliding of the can end and can body mating surfaces Without scratching the underlying protective lacquer.
  • the wax also fills any voids and repairs any defects which may have occurred in the course of the application of the lacquer to the can end or the can body.
  • This invention is principally predicated upon the determination of conditions and materials under which a 100% solids material may be applied to the interior of metal can bodies at commercial can body manufacturing speeds and in such a manner as to meet or exceed present can industry manufacturing standards for protective coatings applied to the interior of metal cans.
  • Airless spray is a well known spraying technique which is different and distinct from conventional air spray. It involves forcing a liquid material through a generally elliptical shaped orifice at high pressures, i.e., generally on the order of from ZOO-1,000 p.s.i. with the result that the spray fans out after emerging from the orifice and breaks up into an atomized spray without the impingement of any air against it.
  • Conventional air spray on the other hand involves extruding a low pressure stream of liquid ma terial from a nozzle at a pressure of from -50 p.s.i. and impacting that extruded stream with a high pressure stream of air on the order of from 35-100 p.s.i. to atomize and convert the extruded stream of fluid into a spray.
  • This airless spray technique in the application of 100% solids melted wax results in a very uniform thin film of wax being applied to the interior of can bodies.
  • Still another aspect of this invention is predicated upon an empirical determination of conditions under which an airless spray technique may be utilized to apply a wax film consisting of 100% melted wax solids to the interior of a can body so as to meet can industry standards. Specifically, it has been determined that if the wax is heated to a temperature substantially above its melting point so as to lower its viscosity, and is forced through a properly sized and configurated orifice, at controlled pressures, and if the substrate or can body is maintained in a heated condition at a temperature substantially above the ambient temperature, a film of 100% solids wax may be applied to the interior of a can body so as to satisfy all requirements of the can industry for interior can surface coatings.
  • the resulting film is very thin and uniform and requires a minimum of coating material.
  • the cost of this material is approximately one-half the cost of material now being utilized.
  • the protection afforded by this wax coating is better than the protection afforded by the lacquers now being appliedto the interior of the cans in the sensethat it is more uniform and will provide a longer can shelf life.
  • wax by the technique which forms the subject matter of this invention has numerous advantages over present commercial practice. Specifically, and most importantly, it reduces by approximately 50% or more the cost of material required to provide a thin protective film of material over the interior of a can. It also alfords better protection of the contents of the can and a resulting longer lived can shelf life.
  • Another primary advantage of this invention is that it eliminates the use of solvent in the protective material applied to the interior of the can. This has several in herent advantages. Principally, it reduces the cost of material by eliminating the need for solvent and the expense incurred for that material which ultimately is wasted when the solvent is heated and boiled out of the protective material to cure it. Its elimination also avoids the pollution problem which results from exhausting that solvent to the atmosphere when the protective material is cured.
  • Another advantage of this invention is that it results in a better protective coating being applied to the can interiors than results from the application of lacquers and resinous material now being Widely used commercially. Consequently, the practice of this invention enables cans to be used for packaging foods, beer and beverages which are made from unprecoated sheet steel. Heretofore, cans made from sheet steel have always had to be precoated. Additionally, the practice of this invention may eliminate the necessity for striping the inside seams of cans so as to apply an extra or second coat of protective material over the interior of the can seam.
  • FIG. 1 is a diagrammatic front elevational view of a machine upon which the invention of this application may be practiced;
  • FIG. 2 is a partially diagrammatic cross-sectional view illustrating the manner in which wax is applied from the nozzle onto the interior of a can body in one set-up for practicing the invention of this application;
  • FIG. 3 is a cross-sectional view taken on line 3--3 of FIG. 2 showing the position of the nozzle relative to the axis of the can;
  • FIG. 4 is a view similar to FIG. 2 but illustrating another set-up for coating the interior of three-piece can bodies according to the practice of this invention.
  • FIG. 5 is a cross-sectional view taken along line 55 of FIG. 4.
  • FIG. 1 there is diagrammatically illustrated one embodiment of a commercially available machine 5 upon which the invention of this application may be practiced.
  • the machine is operable to feed closed bottom cans at the rate of approximately 200 cans per minute pasta spray head or gun 6 located at a can coating station 7 of the machine.
  • cans are rotated by a can rotating mechanism 8 while a spray of coating material is directed onto the complete interior surface of the can.
  • cans are dropped into a discharge chute 9 through which they are conveyed while rotation of the cans is continued until the coating material sets and solidifies sufficiently to prevent running and consequent uneven coating of the interior surface.
  • the machine 5 comprises a frame which supports a motor 11 for driving the can rotating mechanism 8 as well as an indexing head or star wheel 16.
  • This star wheel 16 is rotatably mounted upon a drive shaft which also supports and drives a second can rotating wheel 15.
  • the indexing wheel is so mounted that it may be rotated intermittently and independently of the wheel 15.
  • the star wheel 16 comprises a plurality of radially extending arms 22, in each one of which are mounted three idler rollers; one idler roller 23 projecting peripherally from one side of the arm and a pair of idler rollers 24 projecting peripherally from the other side of the arm 22.
  • Each of the arms 22 is U-shaped in axial cross section and has the rollers 23, 24 so positioned in it as to be cooperable to guide one can 27 between them.
  • Cans 27 are supplied to the index head 16 through an enclosed and heated infeed chute 29.
  • This chute is defined by front and rear guide bars 30 located adjacent the can ends and side guide bars 31, all of which are enclosed by a casing 32.
  • the cans pass into pockets 28 of the star wheel for movement into the spray station 7.
  • the cans move into the spray station, they contact the peripheral surface of the second can rotating wheel and a pair of O-belts 35 of the first can rotating mechanism 8.
  • These belts 35 are mounted on drive pulleys 36 and idler pulleys 37.
  • the Wheel 15 is constructed with a resilient tread 40 on its periphery and is accessible to the pockets 28 of the star wheel 16 between the arms 22.
  • the cans are held out of engagement with the tread 40 of the drive Wheel 15 until they move from beneath the chute toward the spray station 7. In so moving, the cans contact the tread of the constantly rotating wheel such that they are rotating at full speed shortly after arriving at the spray station 7. Simultaneously, the side of the cylindrical can opposite from the wheel 15 contacts and is rotated by the O-belts 35 which travel at the same speed as the linear speed of the tread of the wheel 15. As the can 27' arrives at the spray station 7, it trips a proximity switch 50. This switch senses the presence of the can at the spray station and after a predetermined delay (measured in terms of milliseconds), a burst of liquid spray is initiated from the spray gun 6 onto the interior of the can as it rotates relative to the stationary nozzle.
  • a proximity switch 50 senses the presence of the can at the spray station and after a predetermined delay (measured in terms of milliseconds), a burst of liquid spray is initiated from the spray gun 6 onto the interior of the can as it rotates relative to the
  • actuation of the proximity switch 50 by the presence of a can 27 at the spray station 7 is operable to close an electrical circuit to a solenoid valve 51.
  • the solenoid 52 of this valve then causes the spool (not shown) of the valve to move to a position in which air from a source of pressure 49 is directed via an air line 53 to the spray gun 6.
  • This air pressure actuates a pneumatic motor interiorly of the gun 6 causing it to move a check valve of the gun to an open position. Opening of this check valve (not shown) allows circulating liquid coating material, in this instance heated liquid wax, to flow out of a nozzle orifice 55 and be converted into an atomized spray.
  • the liquid wax is supplied to the gun 6 from a source of melted wax 60.
  • the melted wax is pumped by a pump 61 through a line 62 to the gun.
  • the gun 6 is of the circulating type, i.e., it has a continuous flow 6 of liquid material pumped through it via a return line 63 to the tank 60. In this way the temperature of the wax in the gun remains constant and has no chance to harden in the event that the gun is temporarily turned off.
  • the gun is also preferably heated as is the line 62 through which melted wax is supplied to the gun.
  • the coated can is carried by the star wheel through a small arc and is dropped by gravity into the discharge chute 9.
  • the can is guided by front and rear guide rods 67 and side guide rails 68.
  • the discharge chute is angulated slightly so that the can continues to roll as it falls down the chute and enters a horizontal stretch 69 of the discharge conveyor.
  • the horizontal stretch has an endless drive belt 70 located above it so that cans entering the horizontal stretch of the discharge chute are contacted and rotated by the lower run 72 of the belt. This belt drives the cans in continuous rotation and moves them toward a packing station downstream of the horizontal section of the chute.
  • the length of the discharge chute is such that it maintains the cans in rotation after completion of the spraying cycle and after indexing of the head away from the spray station 7 for approximately thirty seconds.
  • the wax hardens as a result of conversion from a liquid state to a solid state.
  • This post spray rotation of the cans prevents the liquid spray material from running on the heated cans.
  • the wax forms into droplets which run and destroy the uniformity of the coating.
  • the time period required for this post spray rotation may be shortened if so desired by injection of chilled air during the post spray rotation period.
  • the machine heretofore described is a conventional commercially available can coating machine except for the addition of the heated preheat can infeed chute 32.
  • this preheat chute or of a preheat cycle which may be in the form of infrared lamps or induction coils
  • liquid wax sprayed onto the interior of cans cracks, blisters or frosts to form a nonhornogeneous film on the substrate.
  • the interior of the chute 32 is maintained at a temperature near the melting temperature of the wax, in one preferred embodiment F., so that the cans are heated in the chute through a preheat cycle long enough for the cans to reach a surface temperature near the melting temperature of the wax.
  • the spray gun 6 is located externally of the closed end can 27'.
  • the Wax emerges from the nozzle it develops into a fan shaped spray because of the pressure with which the liquid wax is forced through the nozzle.
  • the spray quickly atomizes so that it is a fine atomized spray before it reaches and contacts the interior surface of the can 27'.
  • the can goes through at least three complete revolutions while the atomized spray is directed onto the interior of the can so that the complete interior surface is exposed and evenly coated with coating material.
  • the invention of this application is not concerned with the particular machine upon which the metal cans may be interiorly coated or with the location of the nozzle or even the type of nozzle utilized but rather is concerned with the determination of materials and conditions under which a 100% solids material, i.e., one which contains no solvent, may be sprayed upon the interior of cans under high speed production conditions in such a manner as to satisfy the criteria of the metal can industry with respect to the integrity, uniformity, or evenness, and cost of the coating material.
  • Test No. 1 Test No. 2
  • both tests employ the set-up and the conditions of FIGS. 1-3 for spraying wax onto the interior of cans.
  • the cans were standard beer cans 2 in diameter by 4 1 in length.
  • the cans were made from tin plated sheet steel which had been precoated prior to stamping and forming.
  • the nozzle orifice 55 was located on a diametral center line 76 of the cans during the spraying operation and was ofiset a distance D of from the can axis.
  • the nozzle orifice was offset a distance of 1%" from the end of the can or outside the end of the can.
  • the wax which was used was a wax. manufactured by the National Wax Company and identified by their number 65218LL. This is a blended wax which contains paraffin, microcrystalline waxes and low density resin additives. It has a melting temperature of 175 F.
  • Wax was heated to a temperature between 310-320 F. in the reservoir 60 and was maintained at that temperature by heat applied to the Wax supply line 62 and to the gun 6.
  • the wax was heated to this temperature in order to lower its viscosity to approximately 3.5 to centipoise at which it may be sprayed without graining or flaking when applied to a substrate.
  • the cans were intermittently indexed past the spray gun 6 by the indexing head 16 at the rate of 2116 cans per minute. While located at the station the cans were rotated by the can rotating wheel 15 and by the belts 35 at the rate of 1850 rpm. While so rotating, a burst of wax was sprayed through an airless spray gun 6 for milliseconds or 3.72 revolutions of the cans onto the can interiors.
  • Test No. 1 the cans were preheated for three minutes at a temperature of F. in the infeed tunnel prior to arrival at the spray station 7.
  • the cans were heated for two minutes at F. in the can infeed tunnel before arriving at the spray station. In both tests the cans continued to roll and be rotated in the discharge chute 9 for a period of thirty seconds.
  • the nozzle employed was a commercially available nozzle identified as a Nordson nozzle 092-062 in combination with a Nordson Model No. 027-314 turbulence plate.
  • This nozzle is a conventional drum head nozzle which has a flow rate of 180 cubic centimeters water at 40 p.s.i. gauge and at 77 F.
  • the turbulence plate is inserted upstream of the nozzle to reduce the How rate and better atomize the spray.
  • This particular turbulence plate in combination with the nozzle reduces the flow from this nozzle to 150 cc. water at 40 psi. and at 77 F.
  • Test No. 2 the nozzle employed was a Nordson Model No. 902-200 nozzle in combination with a Nordson turbulence plate Model No. 027-314. This nozzle is a 75-25 control pattern nozzle which has the same fiow rates with and without the turbulence plate as the drum head nozzle employed in Test No. 1.
  • a complete descrip tion of both nozzles may be found in the above identified copending US. patent application Ser. No. 13,598 of W. C. Stumphauzer.
  • Test No. 1 the wax was supplied to the gun 6 by the pump 61 at a pressure of 500 psi. gauge. At this pressure and under the conditions specified in Test No. l, the total weight of wax applied to the interior of the can varied between 950 and 1,000 milligrams per can. When divided by the area of the can this is a coating of 24.6 milligrams per square inch maximum over the can interior.
  • Test No. 2 the melted wax at 310-320 F. was supplied by the pump 61 to the gun at 400 p.s.i. When sprayed onto the interior of the can under the conditions set forth in Test No. 2, the resulting wax coating or film of wax varied between 752 and 802 milligrams of wax per can. This was a maximum weight of 19.7 milligrams per square inch over the interior of the can.
  • the cans utilized were cans which were ultimately intended for use as metal beer containers or beer cans.
  • Can industry standards require these containers test out at an average of 2-5 milliamperes in a Waco Continental model can coating tester.
  • the can is filled with a saline water solution.
  • the electrolyte consists of 10.2 grams of salt per litre of distilled water.
  • FIGS. 4 and 5 there is illustrated a second setup for spraying the interior of can bodies of so-called three-piece cans from spray nozzles located exteriorly of the bodies.
  • Three-piece cans are those which are made from a hollow cylinder to which two ends or caps are crimped after the application of the protective coating to the interior surface of the open-ended cylindrical can and the two ends.
  • the setup depicted in FIGS. 4 and 5 may be utilized on the machine of FIG. 1 by simply locating two nozzles at opposite ends of the cylindrical can body.
  • the two nozzles are positioned so that their sprays overlap near the longitudinal center of the can.
  • the two nozzle orifices 55, 55A, of the two guns 6 and 6A are positioned approximately one inch from the vertical plane of the ends of the can at the spray station.
  • the nozzles are positioned in a horizontal plane slightly below the horizontal plane of the can axis.
  • While conventional airless spray nozzles having an elliptical configuration when viewed in the direction of the axis of the nozzle may be employed in this set up to lay down a generally fan-shaped spray pattern, a drumhead or a 75-25 controlled pattern nozzle is preferred.
  • the spray pattern emitted from the drumhead or controlled pattern nozzles is applied with most of the spray material being located on that side of the nozzle axis 85 which is remote from the can opening near which the nozzle is located.
  • the nozzle axis is preferably angulated at an angle a of approximately 25 for spraying cans 2 4 in diameter and 4 in length.
  • the nozzle orifice is preferably offset approximately from the vertical plane through the can axis and has its orifice directed back to the bottom of the can so that the center line of the spray contacts the can in a vertical diametral plane of the can.
  • cans may be coated with a 100% solids wax without the addition of any solvent under commercial speeds, feeds and conditions by the practice of this invention.
  • waxes have been sprayed onto the interior of cans but never heretofore on metal cans and never heretofore at the speeds at which metal cans must be coated to satisfy can industry production requirements.
  • Nor prior to this invention has anyone ever been able to coat metal cans with a 100% solids material so as to meet the can industry requirements for uniformity and integrity of the coating material and specifically the Waco milliampere test rating standards of the metal can industry for can coatings.
  • Waxes have though been applied to the interior of fibreboard containers in thicknesses many times that employed in the practice of this invention and at speeds a great deal slower.
  • the primary advantage of the practice of this invention is that it completely eliminates the requirement for the addition of solvents and the need to boil those solvents out of the coating material after it is applied to the 10 can in order to cure the coating. It also has the advantage when applied in the thin weights derived from the practice of this invention of substantially reducing the cost of material employed to provide the protective coating required to meet the metal can industry standards.
  • the method of coating the interior of metal can bodies with a film of tasteless and odorless protective coating material which is a solvent free 100 percent solids at ambient temperature at commercial can production speeds comprises the steps of preheating the can bodies, heating the solid material for a sufiicient time and at a sufiicient temperature to melt it and convert it to a liquid state,
  • the method of coating the interior of metal can bodies with a film of tasteless and odorless wax material which melts at a temperature of less than 200 F. and which is a solvent free 100 percent solids at ambient temperature comprises the steps of preheating the can bodies, heating the wax for a sutficient time and at a sufficient temperature to melt it and convert it to a liquid state,
  • the method of coating the interior of metal can bodies with a film of tasteless and odorless wax material which is a solvent free 100 percent solids at ambient temperature comprises the steps of preheating the can bodies,
  • the method of coating the interior of can bodies at commercial can production speeds with a film of tasteless and odorless protective coating wax material which melts at a temperature of less than 200 F. and which is 100 percent solids at ambient temperature which method comprises the steps of heating the solid material for a sufiicient time and at a sufiicient temperature to melt it and convert it to a liquid state, supplying the melted material in the liquid state without the addition of any solvent to a nozzle of a spray gun at a temperature of approximately 300 F.
  • the method of coating the interior of can bodies with a film of tasteless and odorless protective coating material which is 100 percent solids at ambient temperature at commercial can production speeds comprises the steps of 4 heating the solid material for a sufiicient time and at a suflicient temperature to melt it and convert it to a liquid state,
  • the method of coating the interior of can bodies at commercial can production speeds with a film of tasteless and odorless protective coating material which melts at a temperature of less than 200 F. and which is 100 percent solids at ambient temperature which method comprises the steps of heating the solid material for a sufiicient time and at a sufficient temperature to melt it and convert it to a liquid state,

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Spray Control Apparatus (AREA)
US00076168A 1970-09-28 1970-09-28 Method and apparatus for coating metal can bodies Expired - Lifetime US3726711A (en)

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AU (1) AU449933B2 (de)
CA (1) CA940781A (de)
DE (1) DE2149110A1 (de)
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US3816165A (en) * 1972-04-21 1974-06-11 Nordson Corp Improved method and apparatus for stripping inside seams of cans
US3819403A (en) * 1970-09-28 1974-06-25 Nordson Corp Method and apparatus for applying wax to can ends
US3977358A (en) * 1975-05-08 1976-08-31 Alphonse Stroobants Can feeding and coating apparatus
US3995075A (en) * 1974-04-18 1976-11-30 Continental Can Company, Inc. Inside stripe by intermittent exterior spray guns
US4049842A (en) * 1974-07-08 1977-09-20 Eppco Process for interior coating small mouth container open at one end
US4110493A (en) * 1975-10-06 1978-08-29 Gerber Products Company System and method for coating container seams
US4150164A (en) * 1974-01-02 1979-04-17 W. R. Grace & Co. Process for heating cylindrical containers with a plasma arc generated flame
US4163812A (en) * 1974-09-03 1979-08-07 W. R. Grace & Co. Container coating method
US4183974A (en) * 1974-01-02 1980-01-15 W. R. Grace & Co. Container coating method
US4186225A (en) * 1976-08-04 1980-01-29 American Can Company Method of coating the interior surfaces of a hollow article
US4615296A (en) * 1984-08-15 1986-10-07 Nordson Corporation Continuous coating system for discrete articles
US4663195A (en) * 1984-08-15 1987-05-05 Nordson Corporation Continuous coating process for discrete articles
US5096746A (en) * 1990-10-15 1992-03-17 Ball Corporation Dual orifice nozzle and method for interally coating containers
US5215587A (en) * 1991-03-11 1993-06-01 Conal Corporation Sealant applicator for can lids
US5344073A (en) * 1992-04-29 1994-09-06 Nordson Corporation Nozzle cleaning system including spray gun cover for can coating system
US5366162A (en) * 1990-10-15 1994-11-22 Ball Corporation Dual orifice nozzle and method for internally coating containers
US5378798A (en) * 1992-07-10 1995-01-03 Shell Oil Company Composition and process for coating metallic substrates
US5456754A (en) * 1990-07-11 1995-10-10 Sweetheart Cup Company Inc. Apparatus for coating paperboard containers
US5481260A (en) * 1994-03-28 1996-01-02 Nordson Corporation Monitor for fluid dispensing system
US5755884A (en) * 1996-04-10 1998-05-26 Nordson Corporation Coating assembly with pressure sensing to determine nozzle condition
US5941456A (en) * 1997-06-17 1999-08-24 Nordson Corporation Nozzle cleaning system including coating spray gun cover for can coating system
WO2003097252A1 (en) 2002-05-13 2003-11-27 Nordson Corporation Surface rotation speed detection in spray systems
WO2004039506A2 (en) * 2002-10-28 2004-05-13 Nordson Corporation Can lid score repair with uv curable material
WO2007133386A2 (en) 2006-05-09 2007-11-22 Nordson Corporation Control system for can coating
US20090176362A1 (en) * 2004-09-02 2009-07-09 Micron Technology, Inc. Methods of forming interconnects in a semiconductor structure
US20110052806A1 (en) * 2009-08-31 2011-03-03 Nordson Corporation Spray coating with uniform flow distribution
US20130193248A1 (en) * 2012-01-31 2013-08-01 Georgia-Pacific Consumer Products Lp Product, Dispenser and Method of Dispensing Product
WO2020215086A1 (en) * 2019-04-19 2020-10-22 Photex Inc. System and method for inside of can curing
CN112657702A (zh) * 2020-12-15 2021-04-16 上海泰梧科技有限公司 一种油砂输送管内涂层加工用喷涂设备

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US5679160A (en) * 1995-06-07 1997-10-21 Nd Industries, Inc. Apparatus for coating threaded fasteners
CN108787224B (zh) * 2018-08-20 2024-04-23 佛山市创森机电有限公司 空心电抗器表面处理用喷涂装置

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US4049842A (en) * 1974-07-08 1977-09-20 Eppco Process for interior coating small mouth container open at one end
US4163812A (en) * 1974-09-03 1979-08-07 W. R. Grace & Co. Container coating method
US3977358A (en) * 1975-05-08 1976-08-31 Alphonse Stroobants Can feeding and coating apparatus
US4110493A (en) * 1975-10-06 1978-08-29 Gerber Products Company System and method for coating container seams
US4186225A (en) * 1976-08-04 1980-01-29 American Can Company Method of coating the interior surfaces of a hollow article
US4615296A (en) * 1984-08-15 1986-10-07 Nordson Corporation Continuous coating system for discrete articles
US4663195A (en) * 1984-08-15 1987-05-05 Nordson Corporation Continuous coating process for discrete articles
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US5096746A (en) * 1990-10-15 1992-03-17 Ball Corporation Dual orifice nozzle and method for interally coating containers
US5366162A (en) * 1990-10-15 1994-11-22 Ball Corporation Dual orifice nozzle and method for internally coating containers
US5215587A (en) * 1991-03-11 1993-06-01 Conal Corporation Sealant applicator for can lids
US5344073A (en) * 1992-04-29 1994-09-06 Nordson Corporation Nozzle cleaning system including spray gun cover for can coating system
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US5378798A (en) * 1992-07-10 1995-01-03 Shell Oil Company Composition and process for coating metallic substrates
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US5999106A (en) * 1994-03-28 1999-12-07 Nordson Corporation Monitor for fluid dispensing system
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US7730850B2 (en) 2002-05-13 2010-06-08 Nordson Corporation Surface rotation speed detection in spray systems
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US20100215835A1 (en) * 2002-05-13 2010-08-26 Nordson Corporation Surface rotation speed dection in spray systems
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WO2004039506A2 (en) * 2002-10-28 2004-05-13 Nordson Corporation Can lid score repair with uv curable material
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US8647982B2 (en) * 2004-09-02 2014-02-11 Micron Technology, Inc. Methods of forming interconnects in a semiconductor structure
US9724716B2 (en) 2006-05-09 2017-08-08 Nordson Corporation Control system for can coating
US10279364B2 (en) 2006-05-09 2019-05-07 Nordson Corporation Control system for can coating
EP2241378A2 (de) 2006-05-09 2010-10-20 Nordson Corporation .steuersystem zur beschichtung von dosen
US20090235864A1 (en) * 2006-05-09 2009-09-24 Nordson Corporation Control system for can coating
US8916241B2 (en) 2006-05-09 2014-12-23 Nordson Corporation Control system for can coating
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US8578878B2 (en) 2006-05-09 2013-11-12 Nordson Corporation Control system for can coating
US8545937B2 (en) 2009-08-31 2013-10-01 Nordson Corporation Spray coating with uniform flow distribution
WO2011025653A1 (en) 2009-08-31 2011-03-03 Nordson Corporation Spray coating with uniform flow distribution
US20110052806A1 (en) * 2009-08-31 2011-03-03 Nordson Corporation Spray coating with uniform flow distribution
US20130193248A1 (en) * 2012-01-31 2013-08-01 Georgia-Pacific Consumer Products Lp Product, Dispenser and Method of Dispensing Product
WO2020215086A1 (en) * 2019-04-19 2020-10-22 Photex Inc. System and method for inside of can curing
US11633758B2 (en) 2019-04-19 2023-04-25 Photex Inc. System and method for inside of can curing
CN112657702A (zh) * 2020-12-15 2021-04-16 上海泰梧科技有限公司 一种油砂输送管内涂层加工用喷涂设备

Also Published As

Publication number Publication date
FR2108589A5 (de) 1972-05-19
AU3203571A (en) 1973-02-08
DE2149110A1 (de) 1972-03-30
GB1360850A (en) 1974-07-24
AU449933B2 (en) 1974-06-27
CA940781A (en) 1974-01-29

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