MXPA99002087A - Method of transferring metal leaf to a substrate - Google Patents

Abstract

A method of transferring metal leaf, such as gold leaf, to a substrate is disclosed. The method includes the steps of creating a transfer graphic design (16). After the transfer graphic design is created, a pressure sensitive adhesive design (18) in the shape of the transfer graphic design is formed on a transfer sheet (10) having paper backing (12) and a release layer (14). The transfer sheet may be a dry transfer sheet or a water release decal type transfer sheet. The transfer sheet containing the pressure sensitive adhesive design is then placed on a substrate (34) to which the pressure sensitive adhesive design is transferred by removing the transfert sheet so that the pressure sensitive adhesive design adheres to the substrate. Metal leaf is then applied to the pressure sensitive adhesive design.

Description

METHOD FOR TRANSFERRING METAL BREAD TO A SUBSTRATE Field of the Invention This invention relates to a method for transferring bread (thin metal foil) from metal to a substrate and more particularly with the creation of a pressure sensitive adhesive in form of a graphic transfer, application of the transfer to the substrate and then application of the metal sheets or metal pan to the adhesive on a substrate.

BACKGROUND OF THE INVENTION Transfer sizing is used in the process of forming bread (thin metal sheet, which is obtained by beating (cold hammering the metals to reduce them to sheet metal.) Beat the gold, reduce it to very thin sheets that are used for browning)) of high quality metal, such as bread or gold leaf, bread or bronze leaf or other forms of bread or metal sheet on a substrate. For example, gold leaf or bread has traditionally been applied to interior and exterior surfaces by first applying a substance known as transfer sizing. Conventional transfer sizing is a sticky, glue-like substance, which may be either purchased or manufactured by the person carrying out the formation of bread or sheet metal. The transfer sizing is REF. 29686 traditionally available in a slow type and a fast type. The difference between the slow sizing and the fast sizing is the period of time necessary for the sizing to become sticky or to obtain a desired stickiness. Quick sizing becomes adherent very quickly but has a short "open" time or time during which it retains its stickiness. Slow sizing takes a longer time to become adherent but has a longer "open" time depending on the formulation of the sizing. However, rapid sizing and slow sizing are applied as a wet substance that can be extremely annoying. Transfer sizing is also available as an aerosol spray and generally becomes adherent very quickly. However, spray or spray transfer sizing can be run after it is sprayed onto the desired surface. The sizing must first be applied where you want to apply the bread or sheet of metal. The sizing can be marked with stencil (applied by stencil) or painted on a substrate object that will receive the bread or sheet of metal. In general the sizing is applied in coincidence on a background color that provides character to the bread or final metal sheet. However, the background color is frequently not visible due to the humidity of the sizing or the formulation of which it is composed. When the sizing is applied to an object or substrate and reaches the proper tack, the bread or sheet of metal is generally laid gently on the adherent sizing and smoothed very carefully. Then a brush or cloth is moved from back to front on the bread or leaf, in such a way that the abrasive action causes the bread or leaf not attached to the sizing to break to leave the areas coated in the sizing to be formed into bread u sheet of metal. The production of fine details using this method is however extremely difficult, takes a lot of time and requires a skilled technician. Additionally, the chemical compounds and solvents used in the sizing formulation can be flammable and dangerous if used in a closed area and can also be hazardous to the environment. Thus, there is a need for a transfer sizing that is dry, clean, safe for users and the environment, that is easy to prepare and that can be used by an individual with little or no training in the bread-making technique. sheet of metal.

OBJECTS AND BRIEF DESCRIPTION OF THE INVENTION It is thus a general object of the present invention to provide a pan or metal sheet transfer sizing that is safe to use by a user, also as safe for the environment and allowing a high quality bread or sheet metal formation by all individuals. A more specific object of the present invention is to provide a transfer sizing that is dry and eliminates the need for application of a wet or wet sizing prior to the application of the bread or metal sheet to a desired surface. A further object of the invention is to eliminate the use of graphic stencils which must be cut or manufactured in order to apply a wet or wet sizing on the desired areas. A further object is to remove the manual paint from wet or wet sizing on a desired surface. It is another object of the present invention to provide a dry transfer size that becomes sticky quickly, that has a relatively long "outdoor" time and that eliminates the discomfort associated with wet transfer sizing. It is a further object of the present invention to provide a dry transfer sizing that is clear in color and that allows the addition of colored pigment to provide color. It is still a further object of the present invention to provide a dry transfer sizing that is clear in color and that allows the visualization of a background color on the substrate or surface to which the sizing is to be applied. In accordance with one aspect of the present invention, a method for transferring bread or sheet metal is provided which eliminates the need for the prior art that a wet or sprayed sizing be applied prior to the application of the bread or sheet of metal to a substrate or surface. The method for transferring bread or sheet metal to a substrate according to the present invention includes the steps of first creating a transfer graphic design. Next, use a release sheet, which may be a dry release sheet or a water release decal paper, a pressure sensitive adhesive design in the form of the transfer graphic design that is formed on the release sheet by an appropriate process such as screen printing. The release sheet is allowed to dry and then allowed to cure. The use of pressure sensitive adhesive is environmentally safe and does not contain any hazardous or flammable solvent or chemical compound. After curing, the transfer sheet on which the transfer graphic is retained is placed against the substrate or surface on which it is to be applied. If a dry transfer sheet is used, the adhesive and the graphic can be transferred to the substrate by rubbing the back of the transfer sheet. The transfer sheet is then removed to leave the adhesive on the substrate in the form of a dry transfer sizing. If a release paper is used with water, the back of the release paper is wet with water. After about one minute, the release paper is removed and the remaining adhesive size is allowed to dry. Then a bread or sheet of metal, such as bread or gold leaf or bread or bronze leaf or any other finely ground powder, pigment or even flakes can be applied in the traditional manner to the adhesive that is applied to the substrate. The above description rather summarizes the most important features of the present invention in order that the detailed description that follows thereof can be understood and in order that the contributions present to the art can be better appreciated. Other objects and features of the present invention will become apparent from the following detailed description considered in conjunction with the accompanying drawings. However, it will be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention, for reference to which reference must be made to the appended claims.

DETAILED DESCRIPTION OF THE DRAWINGS In the drawings in which similar reference characters denote similar elements in all the various views: Figure 1 illustrates a cross-sectional view of a transfer sheet having a pressure sensitive adhesive disposed on the same for transferring a transfer graphic design to a substrate for bread or sheet metal application; Figure 2 illustrates a cross-sectional view of a transfer sheet having pressure sensitive adhesive disposed thereon for transferring a transfer graphic design to a substrate and having a protective sheet covering the transfer design for storage or packing; Figure 3 illustrates an exploded side view of the transfer graphic design adhered to a substrate after release of the release paper; and Figure 4 illustrates a schematic view of the preferred process for creating a graphic transfer and printing design thereof on a transfer sheet according to the present invention.

DETAILED DESCRIPTION OF THE CURRENTLY PREFERRED EMBODIMENT With reference to Figure 1, there is shown an embodiment of the bread adhesive sheet or sheet metal transfer sheet 10 according to the present invention. The adhesive transfer sheet 10 of the present invention comprises a pattern formed from a pressure sensitive adhesive 18 on a transfer sheet 40 having a paper support 12 and a release layer 14. The preferred method of forming a design from pressure sensitive adhesive 18 on a transfer sheet 12 is illustrated in Figure 4, where a graphic transfer design 16 must first be created and which may be an illustrative design, a drawing or words such as the name of the company for example. The graphic transfer design 16 is advantageously created by using a computer system 22, although other methods such as stencil stenciling can be used. Once the graphic transfer design 17 is created in the computer 22, a black film 24 having the desired design is created by the printer means 26, such as an ink jet printer that is connected to the computer 22. Once the black film 24 comes out of the printer means 26, the black film 24 is applied to a silk screen 28 with a photographic emulsion (not shown) in such a way that wherever there is an image, the silk screen 28 is exposed or "burned", so as to create a burned silkscreen template 30 having small holes on the silk screen 28 corresponding to the graphic transfer design 16 created by the computer 22. Since the words, drawings or created design of the design 16 of graphic transfer will be subsequently attached to a substrate and visualized from in front of the substrate, the black film 24 is turned or inverted before being placed on the stencil 28 d e silk. Although this is the preferred method for creating the graphic transfer design 16, any other method, such as those skilled in the art of creating graphic transfers on a silk stencil are known, can be used, such as manual painting, the scope of The invention is not limited to how the graphic transfer design 16 is created on the silk screen. Then the burned screen template 30 is placed in a screen printing unit 32. A transfer sheet 40 having a paper support 12 and a release layer 14 thereon is placed below the burned screen printing template 30. After this, a pressure sensitive adhesive 18 is placed on top of the "burnt" silk screen 30 in the screen printing unit 32. Then the transfer sheet 40 is printed by screen printing to allow the pressure sensitive adhesive 18 to flow through the small holes in the screen printing template 30 burned. A) Yes, the adhesive 18 is printed by screen printing on the release layer 14 of the transfer sheet 40 in the form of a graphic transfer pattern 16 which was originally created by the computer 22 and printed by the printer means 26. The pressure sensitive adhesive 18 is preferably an automotive pressure sensitive adhesive, such as ESPS 500, manufactured by Electrocal, S. Windsor, CT 06074. However, the invention is not limited in this respect and others may be used contact adhesives. The adhesive 18 is preferably thinned to 20% with water and is clear in color, so that the graphic transfer can be inspected. Advantageously, the pressure sensitive adhesive can be colored with water soluble pigments to provide a backing color for use in the subsequent addition of the metal sheet or bread, also to ensure that the adhesive is visible on the transparent surfaces. The transfer sheet 40 onto which the graphic transfer pattern 16 is placed is preferably any dry transfer sheet 40 known in the art as Chromaslick brand release paper from Chromotek, Inc., 196 Wicksteed Ave., Toronto, Ontario M4G 286. As an alternative, a transfer sheet type water release sticker, such as T incal and Photocal, manufactured by Brittains TR Limited - Ivy House Paper Mills, Commercial Road, Hanley, Stakeon-Tret STI 3QS, England and described in U.S. Patent Application No. 08 / 654,448 of Zemel, filed May 28, 1996, the description of which is incorporated in the present by reference, it can be used in place of a dry transfer sheet 40. The method for transferring bread or sheet metal to a substrate comprises the steps of first creating the graphic transfer design 16 in the computer 22 as discussed hereinabove. Next, a design consisting of pressure-sensitive adhesive 18, in the form created by the transfer graphic design 16 is formed on the release layer 14 of the transfer sheet 40 according to the screen printing process discussed above in FIG. I presented. The forming step further comprises the step of drying the adhesive 18 and the transfer sheet 40 for about 20 seconds after the adhesive 18 has been printed by screen printing onto the transfer sheet 40 and then allowing the transfer sheet 40 and the adhesive 18 cure outdoors, such as on a table for 24-48 hours. A conventional hair dryer is preferably used to dry the adhesive 18 and the transfer sheet 40, although other drying methods may be used. After the forming step is completed, the transfer sheet 40 having the adhesive 18 on it is placed on a substrate 34, as illustrated in Figure 3. If a Chromaslick transfer sheet or other sheet marking is used, the sheet 40 is used. of dry transfer, the transfer sheet 40 with adhesive 18 on it is placed on a substrate 34 or surface with adhesive 18 facing the substrate 34. The reverse or back side 12a of the paper backing or reinforcement 12 is then rubbed or brushed with a polishing or polishing machine (not shown). Other objects such as a fingernail can also be used. Then the paper holder 12 is detached to leave the adhesive 18 on the substrate 34. The adhesive 18 formed in the design created by the design transfer graphic 16 is now ready for the application of the bread or sheet of metal (not shown) about it If the adhesive 18 was printed by silkscreen onto a water-release decal transfer sheet 40, the water-release decal transfer sheet 40 is pressed onto the desired substrate or surface 34 after it has been dried and allowed to cure. . As long as it is pressed against the substrate 34 for the transfer, the reverse or rear side 12a of the release sheet type transfer decal by water is wetted with water. After about one minute, the release sheet 40 of transfer type by water is removed and the adhesive 18 remaining on the substrate 34 is allowed to dry without handling for about 15-20 minutes. After the adhesive 18 has dried, bread or sheet metal can be applied thereto. Thus, the bread or sheet of metal, such as bread or sheet of metal or bread or sheet of bronze or any other powder, finely ground pigment or even flakes can then be applied in the traditional manner to the adhesive 18 which subsists on the substrate 34. It will be noted that the transfer sheet 40 with adhesive 16 does not need to be immediately transferred to the substrate after drying with the hair dryer. Instead, the transfer sheet 40 with adhesive 18 thereon can be covered with a protective sheet 18, as shown in Figure 2, for storage and subsequent use. The protective sheet 20 can be a wax sheet, a silicon sheet or a sheet of parchment paper. Further, after the bread or sheet of metal has been applied to the adhesive 18 on the substrate, an upper coating without solvents can be applied thereto to protect the bread or sheet of bronze or copper. Thus, insofar as the new fundamental features of the invention have been shown, described and indicated as applied to the preferred embodiments thereof, it will be understood that various omissions and substitutions and changes in the form and details of the disclosed invention may be be performed by those skilled in the art without deviating from the spirit of the invention. Accordingly, it is intended to be limited only as indicated by the scope of the claims appended hereto. It will be understood that the drawings are not necessarily to scale but are only conceptual in nature. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (21)

1. Claims The invention having been described as above, property is claimed as contained in the following: 1. A method for transferring bread or sheet metal to a substrate, characterized in that it comprises the steps of: creating a transfer graphic design; forming on a transfer sheet having a support and a release layer a pressure sensitive adhesive design in the form of the transfer graphic design; placing the transfer sheet containing the design of pressure sensitive adhesive on a substrate; transferring the pressure sensitive adhesive design upon removal of the transfer sheet, such that the pressure sensitive adhesive design adheres to the substrate; and apply bread or metal sheet to the design of pressure sensitive adhesive on the substrate.
2. 2. The method for transferring bread or sheet metal to a substrate according to claim 1, characterized in that the pressure sensitive adhesive is an automotive adhesive.
3. 3. The method for transferring bread or sheet metal to a substrate according to claim 1, characterized in that the pressure sensitive adhesive is thinned with water up to 20%.
4. 4. The method for transferring bread or sheet metal to a substrate according to claim 1, characterized in that the transfer sheet is a dry transfer sheet.
5. 5. The method for transferring bread or sheet metal to a substrate according to claim 1, characterized in that the transfer step further includes the step of rubbing the transfer sheet with a polisher or burnisher.
6. 6. The method for transferring bread or sheet metal to a substrate according to claim 1, characterized in that the bread or sheet of metal is bread or gold leaf.
7. 7. The method for transferring bread or metal sheet to a substrate in accordance with claim 1, characterized in that the step of forming on a transfer sheet a pressure sensitive adhesive design comprises the additional steps of: placing a template printed by "burned" screen printing in a screen printing unit; place the transfer sheet under the printed template by "burned" screen printing; place a pressure-sensitive adhesive on top of the printed template by "burned" screen printing; and screen printing the transfer sheet by allowing the pressure sensitive adhesive to flow through the small holes in the printed template by "burned" screen printing.
8. 8. A method for transferring bread or sheet metal to a substrate, characterized in that it comprises the steps of: creating a transfer graphic design; forming on a transfer sheet type decal release by water, the transfer sheet having a support and a release layer, a design of pressure sensitive adhesive in the form of the graphic transfer design; placing the transfer sheet containing the design of pressure sensitive adhesive on a substrate; transferring the pressure sensitive adhesive design upon removal of the transfer sheet, such that the pressure sensitive adhesive design adheres to the substrate; and apply bread or metal sheet to the design of pressure sensitive adhesive on the substrate.
9. 9. The method for transferring bread or sheet metal to a substrate according to claim 8, characterized in that the bread or sheet of metal is bread or gold leaf.
10. 10. A method for transferring bread or sheet metal to a substrate, characterized in that it comprises the steps of: creating a transfer graphic design; forming on a transfer sheet having a support and a release layer, a pressure sensitive adhesive design in the form of the transfer graphic design; dry the design of pressure sensitive adhesive; Place the transfer sheet containing the design of pressure sensitive adhesive on a substrate; transferring the pressure sensitive adhesive design upon removal of the transfer sheet, such that the pressure sensitive adhesive design adheres to the substrate; and apply bread or metal sheet to the design of pressure sensitive adhesive on the substrate.
11. 11. The method for transferring bread or sheet metal to a substrate according to claim 10, characterized in that the bread or sheet of metal is bread or gold leaf.
12. 12. A method for transferring bread or sheet metal to a substrate, characterized in that it comprises the steps of: creating a transfer graphic design; forming on a transfer sheet having a support and a release layer, a pressure sensitive adhesive design in the form of the transfer graphic design, wherein the pressure sensitive adhesive is colored with a water soluble pigment; placing the transfer sheet containing the design of pressure sensitive adhesive on a substrate; transferring the pressure sensitive adhesive design upon removal of the transfer sheet, such that the pressure sensitive adhesive design adheres to the substrate; and apply bread or metal sheet to the design of pressure sensitive adhesive on the substrate.
13. 13. The method for transferring bread or sheet metal to a substrate according to claim 12, characterized in that the bread or sheet of metal is bread or gold leaf.
14. 14. A method for creating a graphic design, characterized in that it comprises the steps of: creating a graphic design in a computer system; create a template corresponding to the form of the graphic design; forming on a transfer sheet having a support and a release layer a pressure sensitive adhesive design in the form of the graphic design on the template, such that when the transfer sheet containing the adhesive design sensitive to the pressure is placed on a substrate, the design of pressure sensitive adhesive is transferred when removing the transfer sheet, in such a way that the design of pressure-sensitive adhesive adheres to the substrate, thereby allowing the application of the bread or metal sheet to the design of pressure sensitive adhesive on the substrate.
15. 15. The method of compliance with the claim 14, characterized in that the pressure sensitive adhesive is colored with a water soluble pigment.
16. 16. The method according to claim 14, characterized in that the transfer sheet is a transfer sheet type decalcomania by water.
17. 17. The method according to claim 14, characterized in that the bread or sheet of metal is bread or gold leaf.
18. 18. The method according to claim 14, characterized in that the template is porous, so as to allow the pressure-sensitive adhesive to be applied through the template and onto the transfer sheet.
19. 19. The method according to claim 18, characterized in that the pressure-sensitive adhesive is printed by screen printing through the template and on the transfer sheet
20. 20. A method for transferring bread or sheet metal to a substrate, characterized because it includes the stages of: creating a transfer graphic design; forming on a transfer sheet having a support and a release layer a pressure sensitive adhesive design in the form of the transfer graphic design; placing the transfer sheet containing the design of pressure sensitive adhesive on a substrate; transfer the design of pressure sensitive adhesive when removing the transfer sheet, in such a way that the design of pressure sensitive adhesive adheres to the substrate and in such a way that the bread or metal sheet can be applied to the adhesive design sensitive to pressure on the substrate.
21. 21. A method for transferring bread or sheet metal to a substrate, characterized in that it comprises the steps of: placing a transfer sheet having a support and a release layer on a substrate; the transfer sheet has a pressure sensitive adhesive design in the form of the transfer graphic design created; transferring the pressure sensitive adhesive design upon removal of the transfer sheet, such that the pressure sensitive adhesive design adheres to the substrate; and apply bread or metal sheet to the design of pressure sensitive adhesive on the substrate.