FI64019C - FOERFARANDE FOER TILLVERKNING AV FLYTTBILDER AV METALL - Google Patents

Description

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Patent- och ragiatarstyralMn '' AmMun uttegd och utUkriftm puMtund 31 .ot>. 03 (32) (33) (31) Requested «product · Begeg prlorttet (71) (72) Hans Alstrand, Uudentuvankatu 1+ C, 20jk0 Turku 7 ^, Finland-Finland (Fl) (7 * 0 Papula Rein Lahtela Oy (5M Method for making transfer patterns from metal - Förfarande för tillverkning av flyttbilder av metall i *

The invention relates to a method for producing transfer patterns, such as transfer letters and / or numbers, from metal. In particular, the invention relates to a method for producing transfer images and transfer letters from a metal foil.

At present, transfer letters ^ and patterns are made, for example, by stamping from a plastic film. Stamping is a relatively expensive method of making decals and letters. For each pattern and letter to be stamped, a stamp corresponding to that pattern or letter is required. Still, changing punches is tricky. Furthermore, the stamped patterns and characters have to be provided with an adhesive to move the characters to the desired location. In addition, the formed pattern and letter marks have to be affixed to a carrier sheet or the like for processing and trade.

2 64019

The object of the present invention is to provide a method for manufacturing figurative marks, in particular of metal, which method does not suffer from the above-mentioned drawbacks. It is a further object of the invention to provide a simple and cost-effective manufacturing method for making metallic figurative marks.

With regard to the features characteristic of the invention, reference is made to the claims.

The invention is based on the production of figurative marks from a metal film by etching. Metal layer, i.e. the foil is provided with an adhesive and the surface of the foil provided with the adhesive is attached to the carrier sheet. The figurative mark is printed on the metal ceffer so that the metal layer is covered under the protective material with respect to the figurative mark. The metal layer is then dissolved by means of a solvent on the part outside the pattern mark, whereby the metal film forms a separate, pattern-covered pattern mark when this outer metal film dissolves in the solvent. The invention is suitable, for example, for the production of various decals and letters from any metal, e.g. aluminum, copper, copper alloys, such as brass, etc.

The production method according to the invention is simple and inexpensive. The method is ideal for large-scale production of pattern marks.

The invention will now be described in detail by means of exemplary embodiments with reference to the accompanying drawing, in which Figure 1 shows a top view of a transfer letter made by the method according to the invention, and

Figure 2 shows a section along the line II-II

from Figure 1.

Figure 1 shows a metal figurative mark made by the method according to the invention, transfer letter 3 64019. According to the invention, a metal layer 2 is formed on the carrier sheet 1, e.g., a sheet of paper, cardboard, plastic film, etc., and a pattern corresponding to said figurative mark A is printed on the metal layer, e.g. by screen printing, offset method, photographic method or otherwise, the metal layer is covered with a protective substance 3 in the case of the figurative mark, e.g. a paint, plastic, etc. a protective substance. Thereafter, the carrier sheet 1 with the metal layer 2 is placed in a bath formed by the solvent until the unprotected metal layer 2 outside the figurative mark is corroded. The solubilizing agent may be any acid dissolving the metal used, such as hydrochloric acid, sulfuric acid, nitric acid, other inorganic and organic acids, or a metal-dissolving base such as sodium hydroxide, potassium hydroxide, other inorganic or organic bases. After dissolution, the carrier sheet 1 with the symbol A has been washed to remove excess solvent and dried.

Figure 2 shows a section of the formed pattern mark with its carrier sheets. The metal layer 2 forms a separate pattern mark which is covered under the protective material 3. In the dissolution step, the surface of the dissolved metal layer is marked with dotted lines 6. The surface of the metal layer, i. below Fig. A there is an adhesive 5 formed on the lower surface of the metal layer before dissolution to transfer and glue Fig. 2 to the desired object. The carrier sheet 1 forms, for example, a production and sales platform for several figurative marks made at one time.

The method according to the invention can be used to produce, for example, metal pattern marks 0.01 to 2 mm, usually 0.01 to 1 mm thick. The pattern marks can be made, for example, several pattern marks at the same time on one carrier sheet provided with a metal layer. Furthermore, the indicia can be made as a continuous process on a continuous, endless carrier layer web with a metal layer.

4 64C19

The figurative marks produced by the method according to the invention can advantageously be transferred by means of a transfer frame comprising a substantially transparent transfer film surrounded by a frame, the other side of which has an adhesive surface, i. the other side of the film is provided with an adhesive. The transfer film is pressed over the pattern mark so that the adhesive side of the film presses against the pattern mark. In this case, the pattern mark adheres to the transfer film, after which the pattern mark is transferred to the installation object. In order to affix the figurative mark to the mounting object on the transfer film, a pressure is applied to the opposite side of the pattern mark at the pattern mark, whereby the pattern mark adheres to the mounting object due to the adhesive 5. Thanks to the transparent transfer film, the pattern mark can be precisely oriented and mounted in the desired position. Furthermore, the transfer film can be provided with, for example, alignment lines or dots corresponding to the horizontal direction of the letter character in order to orient the pattern character in the exact desired direction.

The working examples are intended to illustrate the invention without limiting it in any way. 1