EP0087410A1 - Dispositif de revetement a feuille en rouleau - Google Patents

Dispositif de revetement a feuille en rouleau

Info

Publication number
EP0087410A1
EP0087410A1 EP19810902526 EP81902526A EP0087410A1 EP 0087410 A1 EP0087410 A1 EP 0087410A1 EP 19810902526 EP19810902526 EP 19810902526 EP 81902526 A EP81902526 A EP 81902526A EP 0087410 A1 EP0087410 A1 EP 0087410A1
Authority
EP
European Patent Office
Prior art keywords
belt
thermal
foil
heat
heat source
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.)
Withdrawn
Application number
EP19810902526
Other languages
German (de)
English (en)
Inventor
Jesse B Davis
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.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0087410A1 publication Critical patent/EP0087410A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/10—Applying flat materials, e.g. leaflets, pieces of fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/10—Applying flat materials, e.g. leaflets, pieces of fabrics
    • B44C1/14—Metallic leaves or foils, e.g. gold leaf
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/10—Applying flat materials, e.g. leaflets, pieces of fabrics
    • B44C1/14—Metallic leaves or foils, e.g. gold leaf
    • B44C1/145—Devices for applying metal leaves of foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
    • B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
    • B44C1/17—Dry transfer
    • B44C1/1712—Decalcomanias applied under heat and pressure, e.g. provided with a heat activable adhesive
    • B44C1/1729—Hot stamping techniques

Definitions

  • Roll leaf or hot leaf stamping, or roll leaf coating are relatively well known processes by which a product surface is provided with a trademark, other decorative motif, or protective topcoat.
  • the process provides essentially that a transfer color or design is brought into contact with a product to be coated in the presence of sufficient heat and pressure to assure transfer of the design onto the product surface.
  • the process involves the use of a particular transfer material generally referred to as a stamping foil or roll leaf.
  • a stamping foil or roll leaf As hereinafter referred to the foil or roll leaf itself normally comprises a composition of several materials involving different metals such as aluminum, gold, silver, chromium, as well as different colors and designs.
  • a characteristic foil which is used in the hot stamping process will consist primarily of a thin, plastic carrier film, normally polyester or the like.
  • One surface of the carrier film is provided with a sensitive release agent or resin material.
  • a protective layer or coating is next applied to the heat sensitive release agent.
  • one or more layers of the decorative materials are usually applied by vapor deposition.
  • these layers can consist of a suitable metal such as aluminum, chromium or the like. They could also comprise solid pigments or multi-colored designs.
  • the decorative layers are next covered with a thickness of a sizing coat comprising a heat sensitive adhesive. This latter thickness will serve to bond the one or more decorative coats to the product surface being treated.
  • the decorative layers will be adhered or bonded to the treated surface whereby to give the latter a desired appearance such as that of wood grain, decal or the like.
  • the foil and the product to be decorated are aligned and brought into contact at a transfer station in a machine or appropriate coating fixture.
  • the roll leaf or decorative layers When subject to sufficient release temperature the roll leaf or decorative layers will be separated from the carrier material. Concurrently, the pressure applied at the transfer station, whether by a roll or by a specifically shaped die, will cause the transfer of the roll leaf or decorative layer and its bonding ⁇ aterial to the product surface.
  • a characteristic of the pressure applying surface is such that it will embody a degree of resiliency or yieldability. This feature will account for any irregularities in the surface to be coated.
  • the pressure applying roll when the latter is used, must be capable of withstanding the necessary heat as well as th pressure required to perfect the transfer to the product surface.
  • roller which is found to be acceptable to the purpose is embodied in a cylindrical core to which a silicone rubber coating is bonded.
  • the roller's outer contact face must be sufficiently thick to maintain the desired degree of resiliency.
  • this outer layer on the roll can be between 1/32 to 1/2 inch thick.
  • a further consideration in roll design is the need to raise the contact surface to a temperature level necessary to effect separation of the decorative layer from the carrier material by melting the release agent.
  • the roll is therefore usually provided with both external and internal heating elements normally electri- cally powered.
  • the relatively thick layer mandates a greater power requirement.
  • the layer itself exhibits a relatively steep temperature gradient. It is therefore necessary, that to maintain a predetermined peripheral temperature, the inner surface of the roll's rubber layer be made considerably hotter than the exposed periphery.
  • Silicone rubber although determined to be effective in this thermal transfer process, is also a poor conductor of heat. It is known for example that for each .030 inches of silicone rubber thickness, there is a 25°F. temperature drop. Therefore, to maintain a consistent surface temperature at the roll's working area, the heat generating source must be of a capacity as dictated by the thickness of the poor heat conductive rubber layer.
  • the present invention provides a novel means for supplying sufficient and accurate heat to facilitate transfer of roll leaf layers at higher speeds and productivity rates.
  • the apparatus presently disclosed for achieving the above includes a flexible, thermal belt which defines a closed loop.
  • a belt drive means causes the belt to be guidably moved through a preset heating and cooling circuit.
  • At lease one part of the circuit is provided with a heater element bank or heat source, to bring the belt within a desired temperature range.
  • the driven belt is roller guided to be brought while in maximum heated condition, into heat exchange engagement with at least a portion of the peripheral surface of the roll or pressure element. While contiguous surfaces of the rotating roll and the belt are in contact, a desired heat flow will take place from the belt directly to the roll surface.
  • a further object is to provide a thermal - belt which is utilized to transfer sufficient heat, whereby to effect separation of a roll leaf or decorative layer from its carrier, and to insure its application to the product surface.
  • Another object is to provide an accurately temperature controlled thermal belt for establishing a proper atmosphere in which to transfer a roll leaf or decorative layer to a product surface.
  • *- still further object is to provide a means for effecting a transfer of heat to a pressure roll, whereby to most efficiently utilize the minimal amount of heat available and thereby reduce the power requirements of the overall operation.
  • Figure 1 is a front elevation view of an apparatus embodying the present invention.
  • Figure 2 is similar to Figure 1 illustrating an alternate arrangement of the thermal belt.
  • -7- Figure 3 is a cross-sectional view taken along line 3-3 of Figure 1.
  • Figure 4 is a cross-sectional view taken along line 4-4 in Figure 3.
  • Figure 5 is an electrical schematic drawing.
  • Figure 1 illustrates a preferred embodiment of the invention wherein an elongated strip product is decoratively coated on one surface.
  • the decoration is such as, for example, a simulated wood grain or other pattern which is applied to the surface. It is understood that while the surface to be coated is noted to be a continuous strip, individual units can be similarl treated and coated.
  • the foil and the product strip are preheated to a sufficient temperature to assure full separation of the roll leaf and its reception on the product. With the foil, and the product surface in contact, a predetermined pressure is applied by a resilient faced driven roll to effect the transfer.
  • the decorative layer or leaf material will thus in one step become physically separated and transferred onto the product. Concurrently, a transparent protective coating or layer can if necessary be applied to cover the decorative layer.
  • the latter embodies a mechanism or apparatus 10 particularly adapted for decorating the surface of a relatively thin strip product 11.
  • the thickness and character of the strip is such that it can be rolled onto a reel 12 or the like. It is thereafter readily fed into transfer station 13 of the apparatus.
  • the apparatus basically includes a supporting framework 14 formed of structural members which are so arranged and shaped to best accommodate the various interacting components of the apparatus.
  • the material or product to be coated is fed onto a platform 16.
  • the latter can include a rigidly mounted platen having guide means 17 to accommodate and guide the moving strip.
  • the present platform 16 is . shown as being a fixed or stationary member, a similar function can be achieved by a dynamic or articulated platform such as a rotatable table. The latter would include a plurality of stations which are sequentially brought into registry with transfer station 13.
  • Still another form of a suitable platform embodies the use of a chain belt or the like which functions to carry the product to be coated into the transfer station.
  • a chain belt can adopt the form of a chain-like arrange ⁇ ment which is connected to a suitable variable speed drive.
  • the chain's speed and movement can be regulated in accordance with other factors which will be hereinafter noted.
  • the product to be coated 11, as noted, is shown as embodying an elongated, thin strip.
  • the latter, initially wound onto reel 12 is rotatably positioned on a spindle 18 or the like, to one side of platform 16.
  • Spindle 18 can be freely mounted or even provided with a brake mechanism to best regulate the feed rate with which the strip product is drawn from reel 12.
  • Strip product 11 is led across first guide roller 19, onto the transfer station 13. It thereafter passes from the latter by way of a second guide roller 21, onto a take-up reel 22.
  • the latter is similarly mounted to a spindle 23 which in turn can be connected to a drive or reel-in mechanism.
  • the drive mechanism is adjustable to permit the feed of the strip to be regulated as required in accordance with speed of transfer.
  • the product • can be passed through a cooling element or station. Alternately, it can be drawn for a greater distance to allow for self cooling, before being applied to wind-up reel 22.
  • pressure element 24 comprises a relatively soft surfaced roller.
  • the roller longitudinal axis is aligned parallel to transfer station 13, and substantially normal to movement of the product strip 11.
  • Pressure roller 24 is rotatably journalled to a driven, overhung spindle 26. The latter depends from a variable speed drive unit not presently shown.
  • the pressure roll speed can be varied in accordance with existing transfer conditions and requirements.
  • Spindle 26 is operably positioned by hydraulic cylinders 27 or by similar adjusting means such that it can be continuously or periodically raised from and urged into transfer station 13 to exert a desired pressure.
  • Roller 24 as shown in Figures 3 and 4, is structured basically of a tubular metallic core 31 having end bearing cages 32.
  • the core outer or contact surface 35 is formed of a soft, yet durable heat resistant material.
  • roller surface 35 One material found to be particularly desirable as making up the roller surface 35 is silicone rubber. The latter need be only of sufficient thickness to apply the needed resilient, compressive force during the transfer period. Such an arrangement permits the inside, as well as the periphery of roller 24 to be maintained relatively cool and thus preserve the integrity of the peripheral surface.
  • Pressure roller 24 is journalled at two or more points, preferably at its opposite ends, to spindle 26 by spaced apart bearings 33 such as carried in bearing cage 32. The latter are so positioned that the natural air flow will tend to keep the bearings cool and thereby preserve them from thermal damage.
  • the foil supply carried on the apparatus is preferably wound onto a reel 36. The latter is in turn supported on an idler spindle 37 mounted to one side of pressure roll 24. As herein noted, as the foil strip unwinds from reel 36, it registers in transfer station 13 between the pressure roll -24 and the surface to be coated.
  • the foil strip is further guided by the periphery of roll 24, and aligned with the product strip 11.
  • transfer of the decorative layer from the foil to the product strip is readily achieved.
  • the foil carrier member remaining subsequent to the transfer operation is rewound on a wind-up reel 38.
  • the latter is mounted to a driven spindle 39 such that the wind-up speed can be adjusted and coordinated with the machine speed.
  • the heat requirement to achieve separation of the foil and transfer to the product surface is supplied to transfer station 13 as well as to the pressure roll 24, by a thermal belt 41.
  • the latter defines a closed loop around the roller 24, being threaded on a series of guide rolls including rolls 42 and 43.
  • the closed loop is further positioned such that belt 41 during its traverse, is brought into contact with a heat source or element 44.
  • the closed belt 41 in its circuit can be provided with at least one take-up member.
  • the closed belt 41 in its circuit can be provided with at least one take-up member.
  • a spring biased take-up roll 46 which is pivotally mounted to the machine frame 14 by a movable arm 47.
  • Heater 44 is disposed in a position such that the thermal belt 41 is readily brought into heat exchange contact therewith during the belt's circuit. Said heater 44 as shown, is disposed at the upper end of frame 14 being mounted to conveniently accommodate belt 41 as the latter is driven through its closed, circuit.
  • the heat source 44 can take any one of a number of embodiments adaptable to the present purpose. These include a series or bank of electrical heater elements 45, steam heated units, radiant heaters, or the like. For most practical and efficient purposes, the heating elements are confined within a casing, partial enclosure or the like.
  • heater elements 45 can be provided with suitable modulating means such as a baffle, a movable vane, or other means for deflecting at least some of the heat away " from belt 41.
  • the heater elements 45 can alternately be provided with means for adjusting the level of heat transfer by varying -13- the electrical energy input thereto. In either instance, the heat requirement needed to separate the foil, can be closely regulated. Further, because the belt is so thin, it will not act as a heat sink. To the contrary, the belt will exhibit great sensitivity to thermal change; consequently its temperature on leaving heater 44 can be closely regulated.
  • thermal belt 41 which defines the closed heating loop, is formed of a material capable of being heated to a desired elevated temperature by exposure to heat source 44.
  • a belt adapted to this purpose can be formed of a number of materials or combinations of materi so long as the belt remains relatively pliable and thermally stable at elevated temperatures. It can thus be bent about the respective guide rollers whereby to in effect convey heat from heater 44, to roller 24, and thence to transfer station 13.
  • thermal belt 41 can be formed of thin metal, or of a suitable thermally non-plastic which is capable of functioning at the normally high operating temperature. Further, the belt can be formed of a combination of materials including asbestos, fiber glass, silicone rubber and the like. In any event, the belt is preferably designed to operate without exhibiting serious deterioration at temperatures of about 1700°. It must also be capable of substantially maintaining its physical
  • a thermal sensor member 51 is positioned at a point along the belt's loop to contact sense the belt surface, and continuously monitor the temperature thereof. As shown in Figure 1, temperature monitor 51 can be positioned immediately upstream of transfer station 13 where it can sense the belt temperature just before the latter comes into contact with roller 24.
  • Thermal sensor 51 is thus preset, and integral with the electrical energy source 50 to heater 45, to regulate operation of the latter. Should mechanical means be utilized by the heat meter " for modulation, it, too, can be adjusted in response to the temperature at sensor 51.
  • transfer station 61 at which the decorative layer is applied to the product 66 surface is defined between platform or stationary platen 62 and a rotatable pressure roll 63.
  • the roll leaf or foil 64 is unwound from reel 67 and is passed through the transfer station -15- in contact with both pressure roll 63- and the product 66 to which the decorative coating is being applied.
  • thermal belt 68 The heating arrangement, however, for bringing the surface of pressure roller 63 to the desired temperature 5 is provided through thermal belt 68.
  • the latter is positioned to contact roller 63 in a manner that a greater amount of the roller peripheral surface is exposed to the heating.
  • heating pressure roll 63 is similar to that shown in Figure 1, including the monitoring of belt 68 at sensor
  • rollers 71 and 72 which guide belt 68 in this arrangement is such that the extent of surface along which belt 68 contacts the pressure roller 63, can be varied.
  • either of the said guide rollers 71 or 72 can be adjusted to position more or less

Landscapes

  • Decoration By Transfer Pictures (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

Dispositif de revêtement (10) dans lequel une pellicule de revêtement est transférée d'une feuille en rouleau portant la pellicule sur la surface d'un produit (11). Une plate-forme de positionnement (16) et un organe de pression (24) agissant contre la plate-forme (16) définissent une station de transfert (13) dans laquelle la feuille en rouleau et le produit (11) sont alignés mutuellement. Une courroie thermique (41) guidée et se déplaçant en continu préchauffe la feuille de manière suffisante pour effectuer la séparation entre le support et la couche décorative de la feuille en rouleau et assurer sont transfert sur la surface du produit (11).
EP19810902526 1981-08-31 1981-08-31 Dispositif de revetement a feuille en rouleau Withdrawn EP0087410A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1981/001171 WO1983000818A1 (fr) 1981-08-31 1981-08-31 Dispositif de revetement a feuille en rouleau

Publications (1)

Publication Number Publication Date
EP0087410A1 true EP0087410A1 (fr) 1983-09-07

Family

ID=22161403

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810902526 Withdrawn EP0087410A1 (fr) 1981-08-31 1981-08-31 Dispositif de revetement a feuille en rouleau

Country Status (2)

Country Link
EP (1) EP0087410A1 (fr)
WO (1) WO1983000818A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1216415B (it) * 1986-08-01 1990-02-28 3B Spa Procedimento per realizzare pannelli a superficie incisa,rivestiti con foglio di materiale termodeformabile,e macchina per effettuare il procedimento

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2107249A (en) * 1935-03-25 1938-02-01 Thomas M Royal & Co Paper-bag-machine attachment
US2556008A (en) * 1948-12-28 1951-06-05 William F Stahl Plastic-sealing apparatus
US3382795A (en) * 1967-03-16 1968-05-14 Downs Process Company Stamping machine for applying indicia to articles
SE324452B (fr) * 1967-10-19 1970-06-01 Motala Verkstad Ab
DE2123200A1 (fr) * 1971-03-25 1972-09-28
IT1044829B (it) * 1972-02-16 1980-04-21 Dhj Ind Inc Macchine perfezionata atta a consentire l accoppiamento di tessuti d altri tessuti adesivizzati di rin forzo e suo metodo di fabbricazione e funzionale
US4259143A (en) * 1978-12-01 1981-03-31 General Binding Corporation Laminating machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8300818A1 *

Also Published As

Publication number Publication date
WO1983000818A1 (fr) 1983-03-17

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