US788940A - Method of manufacturing thin bronze or other metal plates. - Google Patents

Description

or adhesive agent.

I UNTTnn STATES Patented May 52, 196$.

PATENT it iii ERNST OESER, OF SCHONEBERG, NEAR BERLIN, GERMANY, ASSEGNOR TO (urENTHlNER .CARTONPAPlER-FABRIK G. M. B. vIi, 0F BERLlN,

GERlvl ANY.

METHOD OF WIANUFACTURENG THIN BRONZE OR OTHER METAL'FLATE$= SPECIFICATION forming part of Letters Patent No. 788,940, dated May 2, 1905.

Application filed November l i, 1903. Serial No. 181,216.

To all whom it 'H'I/(X/Z/ concern.-

Be it known that I, ERNST Onsnn, manufacturer, a subject of the German Emperor, residing at No. 19-20 Bahnstrasse, in the city of Schoneberg, near Berlin, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Methods for the Manufacture of Thin Bronze or other Metal Plates, of which the following is a full and exact specification.

This invention relates to an improved method for the manufacture of thin bronze or other metal plates.

For the purpose of manufacturing metal stampings or printings on paper, leather, or the like it has been usual to use sheet metal and a suitable grounding and binding agent or adhesive; but the sheet metal has the disadvantage that with fine ornaments or with very small letters the patterns do not come out sharp enough and that frequently the object to be treated is impaired by the use of grounding and binding agents. It has also been attempted to manufacture metal stampings and printings by powdering the part to be treated with bronze-powderand then pressing the die upon it. By this method, on the 7 one hand, incompletely-covered stam pings are produced, and, on the other hand, the stamping or pattern has a dead appearance, the socalled bronze stampings never filling the place of those produced by the use of the sheet metal.

In order to quickly and conveniently produce polished metal stampings by nceans of bronze or metal powder, the said metal powder is combined with a thin layer of color in any suitable manner and laid on the part to be printed or patterned similarly to a thin plate of metal without using any grounding The manufacture of such thin bronzeplates is the object of the pres-- ent invention, andaccording thereto the color mass is'laid thinly on aglass plate-which serves first as a support for the bronze-powder, and then said mass is scattered over with the bronze-powder througha suitable sifting device. When dry, the superfluous bronze- ..stampihgpurposes, which consists in form:

powder is removed with a soft brush and the thin layer or plate taken off inthe known manner with a pallet-knife. composed in a similar manner to the known thin plates of color-that is to'say, they consist of size, glycerin, a suitable powdered color as, for instance, zinc-white, ocher, or

It not only,

the lll 6-W2ti31, and albumen. acts as a support, but also as grounding and binding agent, and gives the bronze-powder the necessary polish on the stamping. It will be seen that variouslycolored bronze-powders can be used for the manufacture of said thin bronze plates, and, if necessary, it maybe laid on the already-painted layer in such a manner that the color becomes iridescent in or dcr to produce an iridescent effect in the metal stampings or printings.

What I claim as my invention, and desire to secure by Letters Patent of the United iEt-ates,

1. A method for the manufacture of thin bronze plates for stampings and printings consisting in laying a liquid mass of size and glycerin on a smooth surface, scattering the bronze or other metal powder upon said layer, while still moist, and removing the layer and metal coating when dry from said surface substantially as described.

2. A process for producing bronze-leaf, consisting in forming upon a smooth surface a layer of binding and cohesive material in a moist state, sifting finely-divided bronze thereupon while the former is in a moist state, allowing the product to dry,- and removing the same from said smooth surface in the form of a leaf or foil.

3. A process of producing metal leaves ft stamping purposes, which consists in forming upon a smooth surface a liquid bottom layer of' adhesive material, scattering metal powder on the bottom layer while still moist toform a non-adhesive top layer thereomand removing the product from the smooth sur face when. dry.

4c. A process of producing metal leaves upon a smooth surfaces iiquid bottom The mass is of. adhesive and coloring material, allowing" The foregoing specification signed at Berthe lcximyer to artly dry, tlhen scattering metal lin this 3d clay of November, 1903.

pow er on t e bottom ayer to'form a non v adhesive'tzop layer thereomallowing theprod ERNSI? OLSER" '5 net to completely dry, then removing the su- In presence of perfluous metal powder, and finally removing HENRY HASPER,

the, product from the smooth surface. WVOLDEMAR 'HAUPT.