WO1999046070A1 - Method for making medals, plates and rings using the block making and casting method - Google Patents

Abstract

The invention concerns a method for making medals, plates, jewellery, rings and objects, engraved with lines of portraits, decorations or objects, based on photographs whether of precious metals or not. The method consists in: line block printing from the photograph a negative or positive using a scanner; directly correcting the positive or negative and transforming it on paper for correction; engraving the resulting product to obtain the matrix on a metal plate; moulding, casting and finishing. The treated engraved matrix can also be used directly and it is also possible carry out production in series.

Description

_P ROCEDE REALIZATION OF MEDALS, PLATES AND LOOP USING THE METHOD AND CASTING typogravure

The present invention makes it possible to produce loops, plates, medals, jewelry and objects, engraved with portrait lines, decorations or objects, in precious metals or not with very high precision and resemblance. From a photograph, line drawing according to a special flat function scanner, the line photo is processed to produce a negatii or a positit. The negative or the positive can be worked by hand directly to eliminate the excess lines or to add more when they are missing. This can also be translormed on paper with a laser photocopier or other systems for greater ease of reading, which simplifies the task of finding the features that must be added or deleted. This can be done by hand or using a computer. The engraving of the matrix will be carried out according to several methods:

Typogravure (photogravure) on metal, well known to printers, by contact we go from the positive stage of copying on a metal plate previously presensitized, we develop the sensitive plate, we insulate it in a frame then we put it in the machine to burn in which a mixture of acid and hydrocarbon etches the plaque. You can also make a dabbling pass for the depth of the lines. This matrix will then be cut to the desired size and shape. It will then be inserted into an elastomer mold or other mold material. Unmolding, casting of metal (gold, silver etc ... polishing, then introduction or not in the engraved lines of a varnish, a paint or a paste or mother of pearl etc ... wiping, buffing, finishes The matrix can also be used by removing the sensitive layer on the face and the varnish on the back. The plate being engraved and bare, it can be polished, varnished and also be treated by electrolysis for any metallization with the same Imitate that previously. 2 One can also directly engrave the work of the lines: with the laser; â advanced computer engraving machine or pyrography system; on all supports.

Of course you can get series, by reproducing même the same engraving or by making the unit in series (ex: what is suitable for personalized portraits). Several engraved dies are on the same plate and cut using a tool which reduces the cost since we collect the work done for the search for lines on the same document which ^ is then engraved at the same time, once on the same plate.

Claims

1) Method of making medals, plaques, Dijoux, loops and objects, engraved with portrait lines, decorations, objects, from metal photos characterized in that one makes from from the photo a line drawing to obtain a film with a scanner, we correct the film on paper. A serious the result to obtain the plate engraved on metal (the matrix) using the typogravure method. ) Production method according to claim 1) characterized in that the plate is used directly A O engraved and cut metal by treating it by electrolysis for all metallizations by first removing the sensitive layer on the face and the varnish on the back. 3) production method according to claim 1) characterized in that one uses the engraved plate and > cut out which becomes the matrix for insertion into a mold and the metal is poured. 4) Method of & - realization according to claim 1) characterized in that each engraved and metallized model ends with an introduction into the lines of a varnish, % o of an ink, a paint.