DE662082C - Copy templates for curved surfaces - Google Patents

Description

Master copies for curved surfaces With the present invention The purpose of using master copies is to: transfer an undistorted image onto curved surfaces. .

For this purpose, a metal foil is used as the image carrier, in which the image is created in the form of perforations. The latter can be based on chemical Ways: take place; z. B. by copying and etching, or by printing and etching, or by mechanical means by engraving, punching, drilling, milling, etc.

For the production of master copies it has already been proposed: a transparent plate, preferably made of glass, initially with a metal layer and then to provide these with a photosensitive coating. After copying one Negative and developing the image were its outlines on it up to the transparent one Base etched through.

This method has a significant disadvantage, which -by the present invention is eliminated. By using the metal foils as Sample carrier is given the opportunity to bend the master copy, e.g. Am the cases where graduations, writings, etc. are to be applied to drums. In order to enable a bend, it would be possible, according to the well-known proposal, as a metal layer carrier For example, use celluloid film, this can be used to produce an undistorted Image not achieve, -due to this layer base due to the weather and the usual temperature fluctuations. The application of metal foils offers the possibility of a more versatile use and greater economic efficiency and still allows high accuracy of the images, drawings, Labels, divisions, etc.

Master copies in the context of this invention are understood to mean: a) typefaces, b) line drawings, c) rasterized drawings, d) divisions, e) grid, etc.

Transparent samples produced using the new process can be usefully apply in many ways, e.g. B. for the production spatially curved (cylindrical, conical or wave-shaped) master copies, furthermore of spatially curved printing blocks, whereby the images are copied using a photographic process transfers to the previously photosensitive object made of metal, glass, etc. These transparencies can also be used to generate spatial curved dividing bodies, of copies on glass cylinders, e.g. B. for photocomposing machines, and on lenticular bodies, the metal foil e.g. B. by pressing the shape the lens surface: can be obtained.

In special cases these transparent patterns can be used on those Places where the highest level of accuracy is not required, even with special ones Understand excerpts and then use them with one. the corresponding sample part supporting film or similar paste over. This procedure is particularly recommended when dividing numbers for certain numbers, e.g. B. for the zero, furthermore for less important labeling parts, etc.: For other cases, you can also use e. = Acter way, proceed in such a way that one z, #, 0it; _ or several partially transparent images nacheiil: @. an: who uses or transmits, the zii ", a closed Complete picture.

Claims (1)

PATEN TANSPRücür; i. The use of perforated Metal foils as templates for transferring precise divisions, labels and the like on curved surfaces. i. Master copy according to claim i; there-. characterized by that the metal foil: @ still has special openings, 'e-seen that with the corresponding pattern part bearing film strips or the like. Be pasted over. 3. The use of metal copy templates according to claims i and a in the manner; that two or more sub-templates are transmitted one after the other, resulting in one Complete the overall sample.