US3013900A - Cast coating of individual cartons - Google Patents

Cast coating of individual cartons Download PDF

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Publication number
US3013900A
US3013900A US806910A US80691059A US3013900A US 3013900 A US3013900 A US 3013900A US 806910 A US806910 A US 806910A US 80691059 A US80691059 A US 80691059A US 3013900 A US3013900 A US 3013900A
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Prior art keywords
blank
roll
coating
casting roll
agent
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US806910A
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English (en)
Inventor
Yezek Milton
Walter C Utschig
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General Foods Corp
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General Foods Corp
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Filing date
Publication date
Priority claimed from US663269A external-priority patent/US2912347A/en
Application filed by General Foods Corp filed Critical General Foods Corp
Priority to US806910A priority Critical patent/US3013900A/en
Priority to GB37311/59A priority patent/GB896142A/en
Priority to AT290860A priority patent/AT248857B/de
Priority to AT290960A priority patent/AT248858B/de
Application granted granted Critical
Publication of US3013900A publication Critical patent/US3013900A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/009—Apparatus for glaze-coating paper webs
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/18—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising waxes
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/66—Treating discontinuous paper, e.g. sheets, blanks, rolls
    • D21H23/68—Treating discontinuous paper, e.g. sheets, blanks, rolls whereby the paper moves continuously
    • 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
    • D21H5/006—Controlling or regulating
    • D21H5/0062—Regulating the amount or the distribution, e.g. smoothing, of essentially fluent material already applied to the paper; Recirculating excess coating material applied to paper
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/60—Waxes
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls

Definitions

  • the method makes it posible to produce high gloss cartons at high production speeds owing to the steps, as hereinafter described, of rapidly removing heat from the thermoplastic agent deposited on the carton blanks, the agent being applied from a molten bath of the same.
  • the invention is particularly characterized by the fact that by waxing individual carton blanks, there can be avoided the scufilng of the waxed surfaces that occurs when a continuous web of paper is first waxed and then cut into individual blanks. Furthermore, waxed waste, whether resulting from scuifing or other causes is reduced by waxing the individual blanks rather than a continuous web. Waxed waste is essentially not salvageable, unlike unwaxed waste.
  • the method generally comprises producing individual cartons having a smooth glossy coating of thermoplastic agent by applying a coating of molten agent on one side of each of a series of successive individual carton blanks.
  • Each blank having the agent thereon in a plastic state is successively moved into the nip of an impression roll and a cold casting roll so that the coated side of the blank comes into intimate contact with the casting roll.
  • the latter has a smooth mirror-finished surface with which the blank side makes contact and to which it adheres, being immovably disposed relatively thereto.
  • the casting roll rotates, the blank is urged into said intimate contact by means of the impression roll, thereby to uniformly distribute the agent on the adhering blank side.
  • the surface of the casting roll is maintained at a temperature substantially below the fusing point of the agent to rapidly cool the coating on the blank.
  • rotation of the casting roll serves to move the blank into contact with at least one body of cold water, thereby to further cool the coating, the water making contact with the uncoated side of the blank.
  • the blank While still immovably disposed relative to the casting roll, the blank is cooled by said roll and the body of water for a time sufficient to insure solidification of the coating, after which the blank is peeled from the casting roll, and there is obtained a blank having a smooth glossy coating of thermoplastic agent on one side thereof.
  • FIG. 1 diagrammatically illustrates one method of carrying out the invention
  • FIG. 2 diagrammatically illustrates a modified method
  • FIGS. 3 and 4 diagrammatically illustrate modified steps of the various methods.
  • FIG. 5 diagrammatically illustrates still another modified method.
  • FIG. 1 there is shown a blank being moved from a suitable source (not shown) onto a moving conveyor belt 11 which introduces it to an applicator zone 12 where it moves through a plurality of pairs of applicator rolls, as illustrated by the positions of the preceding blanks 13 and 14 of the series being treated.
  • the blanks are represented by side edge views of the same.
  • the applicator rolls comprise pairs of upper and lower rolls 15 and 16, 17 and 1 8, and 19 and 20, the lower rolls being partly immersed in a bath 21 of molten thermoplastic agent contained in the tank 22, the latter being suit- Patented Dec. 19, 1961 ably heated by means not shown.
  • the blank 14 with the coating of agent on one side of the same in a plastic state is shown being moved in a generally downward direction.
  • the impression roll 24 urges each blank into intimate con.
  • the casting roll is internally cooled by circulating a brin through it by means not shown so as to maintain the surface of the roll at a temperature substantially below the fusing point of the thermoplastic agent.
  • each adhering blank is moved downwardly into the path of a cooling stream or spray 25, preferably a stream, of cold water applied to the outer uncoated side thereof from suitable means such as the spout 26, after which the blanks are moved into the bath 27 of cold water in tank 28 to further cool the coating.
  • a bafile :29 helps to direct the stream 25 against blank '30 and to prevent water from striking the impression roll 24 or the adjacent surfaces of the roll 23.
  • Each blank is maintained in the cold water bath 27 for a time sufiicient to insure solidification of the coating, note blanks 31 and 32. It will be understod that through out the foregoing cooling steps the blanks are immovably disposed relative to the casting roll surface.
  • the blanks leave the cold water bath Z7 and pass upwardly into the nip of roll 23 and a soft rubber wringer roll 33, the latter removing excess water from the uncoated side thereof, after which each blank is peeled from roll 23 by means of the knife 34.
  • the peeled blank tends to fall over to one side, away from roll 23, and onto a moving conveyor belt 3 5, note blanks 36, 37, and 38, which carries them away.
  • the depth of immersion of the casting roll in the water bath is variable but in no case should the water touch the roll 36. It should be noted that the low disposition of the latter roll relatively to, say, the rotational axis of roll 28, enables the peeled cartons to fall onto the conveyor 35 at least partly by the aid of gravity.
  • FIG. 2 a modified method is shown wherein no water streams or sprays are used. Rather, the water level in the bath is increased, that is, the casting roll is immersed to a greater depth to provide increased cooling. Otherwise, the method of FIG. 2 is the same as that illustrated in FIG. 1, with the same structures being indicated by the same reference numerals except that in FIG. 2 the letter a is added to each numeral. It may be noted, however, that in FIG. 1 the lower disposition of the roll 33 permits the conveyor 35 to be disposed nearer the water bath. The applicator is only partly shown at 12a and the conveyor 11 of FIG. 1 is omitted to prevent the showing from becoming congested.
  • FIG. 3 a modification is shown comprising the use of an air jet 40 in place of the knife 34 or 34a for peeling each blank from the casting roll 23b.
  • the air stream issuing from the jet not only serves to peel the blank but also helps to blow it over onto the removing conveyor.
  • the air stream can be used as a means of removing any water droplets from the casting surface.
  • FIG. 4 another modification is shown comprising the use of both the knife 34c and the air jet 400 to peel the blank 36c from the roll 23c.
  • the use of the knife and the air jet together on the apparatus of FIG. 1 represents a preferred modification.
  • the knife is a simple mechanical device for effecting a clean separation of the cartons, and the air jet further aids the separation while providing the advantages noted above. It will be understood that the knife and air jet may be used together on FIG. 2 as well as FIG. 1.
  • FIG. 5 a further modification is illustrated according to which the blanks are peeled from the casting roll 23d beneath the level of the water in tank 28d.
  • a knife blade 41 is suitably disposed beneath the water level and acts to peel the blank 32d, which then falls onto the adjacent moving conveyor belt '42 which is also disposed beneath the water level.
  • the blanks are removed from the bath by engagement between an upper conveyor 43 and the lower conveyor 42, and are fed to a pair of wringer rolls 44 and 45 disposed above the water level which remove excess water from each blank, note blanks 37d and 38d.
  • the modification of FIG. 5 provides an easier and more positive transfer of the peeled blanks to the conveyors.
  • each blank is removed from the lower half of the casting roll, the momentum of the roll enables the blank to fall forward towards the conveyor belt 42 and thus gives it a better start, so to speak.
  • the belt 42 by virtue of its disposition at or below the peeling point of the blank, further aids the blank in getting started on its way to a delivery Zone beyond rolls 44 and 45.
  • an air jet such as 40 or 400 may be used in conjunction with the roll 23d to remove any water from the casting surface.
  • FIG. 5 the applicator is only partly shown at 12d and the conveyor 11 of FIG. 1 is omitted, as in the case of FIG. 2, for the reason noted.
  • the packaging material of which the blanks are made may comprise printed or unprinted paper board, or a glue laminated structure comprising paper adhered to board by means of glue, or any other suitable material which would be benefitted by the presence of a highly glossy coating.
  • glue any other suitable material which would be benefitted by the presence of a highly glossy coating.
  • Other materials are cellulosic films including cellophane and cellulose acetate; also foil of aluminum or tin.
  • paper web it is intended to include webs of paper of the types noted, plastic films, metal foil, paperboard, and the like.
  • the paperboard may include boards made from pure chemical pulps such as bleached and unbleached kr-aft; soda and sulphite boards; boards made from semi-chemical pulp such as corrugating medium board and bleached semi-chemical board; boards made from waste materials such as chip board and jute board; and boards made from combinations of waste, groundwood and chemical pulps such as White patent coated news board, double Manila lined news, groundwood center, and double bleached lined waste-groundwood center board.
  • the thermoplastic agent may be an agent such as paratfin wax, microcrystalline wax, polyethylene of low molecular weight, say in the range of about 2000 to 21,000, etc. Also, other thermoplastic resins besides polyethylene are suitable, such as polypropylene of low molecular weight. Mixtures of two or more of the foregoing agents are suitable, such as a combination of parafiin wax and microcrystalline wax or polyethylene.
  • the agent should, of course, be capable of producing gloss when deposited on the blank, and its melting point should not be so high as to injure the blank.
  • the particular composition to be used will depend on the particular product desired; for example, for a product having high gloss, moderate resistance to water vapor transfer (WVT), and good scutf-proofness, a suitable agent is polyethylene having a molecular weight of 6000 to 14,000; for high gloss, good WVT protection, and good scufi-proofness, a suitable agent is parafiin wax, or combinations of paraffin wax, microcrystalline wax and polyethylene.
  • WVT water vapor transfer
  • a suitable agent is polyethylene having a molecular weight of 6000 to 14,000
  • a suitable agent is parafiin wax, or combinations of paraffin wax, microcrystalline wax and polyethylene.
  • the amount of thermoplastic agent is usually sufiicient to coat each blank to a thickness of about 0.0001 to 0.025 inch.
  • the agent may be applied in an amount ranging from 3 to 300 lbs. per 3000 sq. ft. of blank area.
  • the cold casting roll 23 is cooled by means of a brine which circulates within it, the circulating equipment being conventional and therefore not shown.
  • the temperature of the cooled roll will depend on the thermoplastic coating agent, but in any event is below the fusing point of the thermoplastic agent. More particularly, the temperature may range from just above 32 F. to about 70 F. The lower temperature of such range should be such as to avoid the formation of ice on the casting roll surface. Preferably, the upper temperature is 40 F. Cooling of the coating on the blanks is quite rapid after initial contact with the cold roll. Such cooling step, which may be described as shock cooling, owing to its rapidity, is described in detail in co-pending application, Serial No. 663,269, filed June 3, 1957, now Patent No. 2,912,- 347, of which the present application is a continuation-inpart.
  • the cold roll 23 on which is provided the smooth surface necessary to produce the high gloss preferably has a coating on such surface comprising a continuous, hard, glossy, and extremely smooth sheet of material such as vinyl acetate.
  • This sheet or coating possesses good release properties, that is, readily permits the coated blank to be peeled off therefrom; or, stated another Way, the coating on the blank has good adherence to the casting roll but the cohesive strength of such coating for itself and to the blank exceeds the adherence of such coating for the casting roll.
  • the sheet or coating on the casting roll has such a high degree of smoothness as to insure production of a continuous surface on the film or coating which is cast onto the blank.
  • compositions capable of offering a smooth, mirror-finished surface and good release properties may be employed, such as a sheet of copper or aluminum foil, or a lacquer of silicone or other resin.
  • roll 23 may also comprise a polished metal roll, or a nickelor chromium-plated roll.
  • the casting surface of the cold roll should have a mirror-like finish and should have a surface which, when cooled to substantially below the fusion point of the coating on the paper blank, adheres to the latter coating with only a slight bond such that the coated blank can be readily peeled therefrom.
  • the cold roll 23' may be replaced by an endless belt having a smooth mirror-finished surface, although a roll is preferred.
  • the impression roll 24 is continuously heated, being maintained at an elevated temperature approximating the melting point of the thermoplastic agent during contact of the roll with the blank.
  • the heated roll 24 helps maintain the coating in a substantially plastic state, such state of plasticity being essential to enable roll 24, as it presses the coated agent against the smooth surface of roll 23, to smoothen the coating so that it becomes more uniformly continuous.
  • the smooth mirror-finished surface of roll 23 imparts a high gloss to the coating.
  • Peeling off of the blank from roll 23 is controlled by the roll 33, which has a soft rubber Surface and which is in pressure contact with the blank-covered roll 23-.
  • the rotational axis of roll 33 is substantially parallel to that of roll 23 to avoid any eccentricity in the peeling step and any distortion of the coating.
  • the water in bath 2.7 may be ordinary cold water having a temperature of about 32 to 60 F., although a colder brine solution may also be employed.
  • the waterfall may be water of a temperature in the range of that of the water bath; it may also comprise brine.
  • the method may be operated at speeds of 200 to 500 ft. per minute, depending on the size and temperature of the casting roll, the amount of cooling water used, and the temperature of the water bath.
  • multiple streams of carton blanks may be processed.
  • a plurality of wax applicators may be disposed side by side, that is, parallel to one another, and they may feed coated blanks in parallel streams to the cold casting roll, it being understood that such roll, and the impression roll 24, will be wide enough to accommodate two, three or more parallel streams of blanks.
  • These blanks may then be cooled as described, removed from the casting roll by means of a plurality of knives or air jets and one or more cooperating wringer rolls, and fed either to one suitably wide conveyor belt or toa plurality of narrower belts.
  • Each coated blank has an extremely glossy, smooth, and continuous surface that is entirely free of imperfections such as crows fee.
  • the continuity of each coat means that the resulting carton will have good resistance to the transfer of water vapor therethrough in the, subsequent use to which such carton may be put.
  • the coating also protects the carton against scuffing, particularly in the case of inked papers where it prevents the ink from being transferred over onto non-inked areas as by pressure from a users fingers.
  • the coating improves the product in respect of its sealing capacity toward air, etc.
  • Method of continuously producing individual carton blanks having a smooth glossy coating thereon which 6 comprises continuously moving a series of longitudinally spaced individual carton blanks between spaced pairs of applicator rolls to deposit on one side of eachblank a coating of molten thermoplastic agent which fuses on chilling, then moving each said blank having the agent thereon in a plastic state in a generally downward di rection into the nip of a rubber impression roll and a cold casting roll to bring the coated side of the blank into intimate contact with the surface of the casting'roll, said casting roll having a smooth mirror-finished surface and said blank adhering thereto, said blank also being immovably disposed relatively to said surface, rotating said casting roll and urging succeeding portions of said blank into said intimate contact by means of said impression roll to uniformly distribute the agent on said blank side; maintaining the surface of the casting roll at a temperature substantially below the fusing point of said agent to cool the coating on said blank; rotating the casting roll to move said blank downwardly toward a body of cold water, coincidently with said downward,
  • Method of continuously. producing individual carton blanks having a smooth glossy coating thereon which comprises continuously moving a series of longitudinally spaced individual carton blanks between spaced pairs of applicator rolls to deposit on one side of each blank a coating of molten thermoplastic agent which fuses on chilling, then moving each said blank having the agent thereon in a plastic state in a generally downward direction into the nip of a rubber impression roll and a cold casting roll to bring the coatedside of said blank into intimate adhering contact with the surface of the casting roll, said casting roll having a smooth mirrorfinished surface and said blank being immovably disposed relatively thereto, rotating said casting roll and urging succeeding portions of said blank into said intimate contact by means of said impression roll to uniformly distribute the agent on said blank side; maintaining the surface of the casting roll at a temperature substantially below the fusing point of said agent to cool the coating on said blank; rotating the casting roll to move said blank downwardly toward and through a body of cold water to further cool said coating; maintaining each said blank, while immovably disposed relatively to and in
  • Method of continuously producing individual carton blanks having a smooth glossy coating thereon which comprises applying a coating of molten thermoplastic agent which fuses on chilling on one side of each of a series of individual carton blanks, moving each blank having the agent thereon in a plastic state into the nip of an impression roll and a cold casting roll so that the coated side of the blank comes into intimate contact with and adheres to the surface of the casting roll, said casting roll having a smooth mirror-finished surface and said blank being immovably disposed relatively thereto; rotating said casting roll and urging succeeding portions of the blank into said intimate contact by means of said impression roll, thereby to uniformly distribute the agent on said blank side; maintaining the surface of the casting roll at a temperature substantially below the fusing point of said agent to cool the coating on said blank; continuing to rotate the casting roll and moving the blank thereon toward and through a body of cold water which makes contact with the uncoated side of the blank, thereby to further cool said coating; maintaining said blank, while immovably disposed relatively to and in contact with said casting roll
  • Apparatus for producing smooth glossy coatings of thermoplastic agent on individual carton blanks comprising applicator means for depositing a coating of melted thermoplastic agent on one side of each blank, a rotatable cold casting roll disposed beneath said applicator means for receiving each said blank on the surface of the same, said surface being smooth and having a mirror finish, said coated side of said blank making contact with and adhering to said surface, a rubber impression roll adjacent one side of said casting roll and forming a nip therewith, said adhering blank being adapted to pass through said nip whereby said impression roll acts to distribute the coating agent uniformly over said adhering side of the blank, each said blank thus becoming immovably disposed relatively to the casting roll surface, means for delivering cold water to the outer exposed side of said blank to cool the coating, baflie means to prevent water from wetting the impression roll and the casting roll surface intermediate the impression roll and the point of introduction of said blank on the casting roll, a cold water bath in which the lower part of said casting roll is immersed
  • Apparatus for producing smooth glossy coatings of thermoplastic agent on individual carton blanks comprising applicator means for depositing a coating of melted thermoplastic agent on one side of each blank, a rotatable cold casting roll for receiving each said blank on the surface of the same, said surface being smooth and having a mirror finish, said coated side of said blank making contact with and adhering to said surface, an impression roll forming a nip with said casting roll, each said adhering blank being adapted to pass through said nip whereby said impression roll acts to distribute the coating agent uniformly over said adhering side of said blank, each said blank thus becoming immovably disposed relatively to the casting roll surface, a cold water bath in which the lower part of said casting roll is immersed and in which said casting roll is adapted to rotate, said water making contact with the outer side of said adhering blank on the casting roll to cool the coating thereon, means for peeling said adhering blank from the casting roll, and
  • said peeling means comprises a knife blade disposed beneath the surface of the water bath, said conveyor means being at least partly disposed beneath the surface of said water bath, and said disposition of the knife blade and conveyor means enabling each said carton blank to be peeled from the casting roll and transferred to the conveyor means while immersed in said water bath.
  • Apparatus for producing smooth glossy coatings of thermoplastic agent on paper comprising applicator means for depositing a coating of melted thermoplastic agent on one side of the paper, a rotatable cold casting roll for receiving the paper on the surface of the same, said surface being smooth and having a mirror finish, said coated side of the paper making contact with and adhering to said surface, an impression roll forming a nip with said casting roll, said paper being adapted to pass through said nip whereby said impression roll acts to distribute the coating agent uniformly over said adhering side of the paper, said paper thus becoming immovably disposed relatively to the casting roll surface, a cold water bath in which the lower part of said casting roll is immersed and in which said casting roll is adapted to rotate, said water making contact with the outer side of said adhering paper on the casting roll to cool the coating thereon, means for peeling the adhering paper from the casting roll, and means adjacent said peeling means for removing the paper.
  • Method of producing a smooth, glossy coating on an individual carton blank which comprises applying to at least one side of said blank a coating of molten thermoplastic agent which fuses and solidifies on cooling, bringing said blank into contact with a cooled casting surface so that the coated side of said blank is disposed against and adheres to said casting surface, moving said casting surface to a position in which said blank adhered thereto is contacted by a liquid at a temperature substantially below the fusing point of said agent, and peeling the cooled coated blank from said casting surface.
  • Method of producing a smooth, glossy coating on an individual carton blank which comprises applying to at least one side of said blank a coating of molten thermoplastic agent which fuses and solidifies on cooling, bringing said blank into contact with a cooled casting surface so that the coated side of said blank is disposed against and adheres to said casting surface, moving said casting surface to a position in which said blank adhered thereto is submerged in a body of liquid at a temperature substantially below the fusing point of said agent, maintaining said blank submerged in said body of liquid for a time sufficient to ensure solidification of said coating, and peeling the cooled coated blank from said casting surface.
  • Method of producing a smooth, glossy coating on an individual carton blank which comprises applying to at least one side of said blank a coating of molten thermoplastic agent which fuses and solidifies on cooling, bringing said blank into contact with a cooled casting surface so that the coated side of said blank is disposed against and adheres to said casting surface, cascading a flow of liquid at a temperature substantially below the fusing point of said agent over a side of said blank opposed to said one coated side immediately after said blank has adhered to said casting surface, moving said casting surface to a position in which said blank adhered thereto is submerged in a body of liquid at a temperature substan tially below the fusing point of said agent, maintaining said blank submerged in said body of water for a time suflicient to ensure solidification of said coating, and peeling the cooled coated blank from said casting surface.
  • Method of producing a smooth, glossy coating on an individual carton blank which comprises applying to at least one side of said blank a coating of molten thermoplastic agent which fuses and solidifies on cooling, bringing said blank into contact with a cooled casting surface so that the coated side of said blank is disposed against and adheres to said casting surface, moving said casting surface to a position in which said blank adhered thereto 5 is submerged in a body of liquid at a temperature substantially below the fusing point of said agent, maintaining said blank submerged in said body of liquid for a time sufiioient to ensure solidification of said coating, 'and While said blank is so submerged peeling the cooled coated 10 blank from said casting surface.

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  • Application Of Or Painting With Fluid Materials (AREA)
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US806910A 1957-06-03 1959-04-16 Cast coating of individual cartons Expired - Lifetime US3013900A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US806910A US3013900A (en) 1957-06-03 1959-04-16 Cast coating of individual cartons
GB37311/59A GB896142A (en) 1957-06-03 1959-11-03 Method and apparatus for producing glossy coated carton blanks
AT290860A AT248857B (de) 1959-04-16 1960-04-15 Verfahren zur Herstellung von zusammengeschichtetem Verpackungsmaterial und Vorrichtung zur Durchführung des Verfahrens
AT290960A AT248858B (de) 1957-06-03 1960-04-15 Verfahren und Vorrichtung zur kontinuierlichen Herstellung von einzelnen Kartonzuschnitten mit einem glatten, glänzenden Überzug

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US663269A US2912347A (en) 1957-06-03 1957-06-03 Process of producing glossy wax-coated paper
US806910A US3013900A (en) 1957-06-03 1959-04-16 Cast coating of individual cartons

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US3013900A true US3013900A (en) 1961-12-19

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US806910A Expired - Lifetime US3013900A (en) 1957-06-03 1959-04-16 Cast coating of individual cartons

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US (1) US3013900A (de)
AT (1) AT248858B (de)
GB (1) GB896142A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3157528A (en) * 1961-10-05 1964-11-17 Crown Zellerbach Corp Apparatus and method for cast coating sheet material
US3406466A (en) * 1967-07-12 1968-10-22 White Cons Indsutries Inc Drying apparatus
US3431139A (en) * 1965-07-21 1969-03-04 Azoplate Corp Process and apparatus for successively withdrawing individual articles from a stack
US4133710A (en) * 1975-01-21 1979-01-09 Cordotex Sa Method for forming a polyethylene layer on a substrate
US5238517A (en) * 1987-10-15 1993-08-24 Cmb Foodcan Plc Production of laminated materials
US5302324A (en) * 1990-03-20 1994-04-12 Morikawa Sangyo Kabushiki Kaisha Method for decontaminating substances contaminated with radioactivity, and method for decontaminating the materials used for said decontamination
US20110031375A1 (en) * 2009-08-04 2011-02-10 Reynolds Foil Inc., D/B/A Reynolds Consumer Products Company Laminated baking mold

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US353122A (en) * 1886-11-23 Stephen m
US1719166A (en) * 1927-01-03 1929-07-02 Champion Coated Paper Company Process of calendering mineral-coated paper and product
US2360919A (en) * 1940-07-05 1944-10-24 Champion Paper & Fibre Co Method of coating paper
US2642366A (en) * 1951-03-23 1953-06-16 Marathon Corp Method of coating sheet material with wax
US2892735A (en) * 1956-10-02 1959-06-30 American Can Co Method of obtaining a glossy wax coating on paper and resultant product

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US353122A (en) * 1886-11-23 Stephen m
US1719166A (en) * 1927-01-03 1929-07-02 Champion Coated Paper Company Process of calendering mineral-coated paper and product
US2360919A (en) * 1940-07-05 1944-10-24 Champion Paper & Fibre Co Method of coating paper
US2642366A (en) * 1951-03-23 1953-06-16 Marathon Corp Method of coating sheet material with wax
US2892735A (en) * 1956-10-02 1959-06-30 American Can Co Method of obtaining a glossy wax coating on paper and resultant product

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3157528A (en) * 1961-10-05 1964-11-17 Crown Zellerbach Corp Apparatus and method for cast coating sheet material
US3431139A (en) * 1965-07-21 1969-03-04 Azoplate Corp Process and apparatus for successively withdrawing individual articles from a stack
US3406466A (en) * 1967-07-12 1968-10-22 White Cons Indsutries Inc Drying apparatus
US4133710A (en) * 1975-01-21 1979-01-09 Cordotex Sa Method for forming a polyethylene layer on a substrate
US5238517A (en) * 1987-10-15 1993-08-24 Cmb Foodcan Plc Production of laminated materials
US5302324A (en) * 1990-03-20 1994-04-12 Morikawa Sangyo Kabushiki Kaisha Method for decontaminating substances contaminated with radioactivity, and method for decontaminating the materials used for said decontamination
US20110031375A1 (en) * 2009-08-04 2011-02-10 Reynolds Foil Inc., D/B/A Reynolds Consumer Products Company Laminated baking mold
US9237752B2 (en) * 2009-08-04 2016-01-19 Reynolds Consumer Products Inc. Laminated baking mold

Also Published As

Publication number Publication date
GB896142A (en) 1962-05-09
AT248858B (de) 1966-08-25

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