DE272316C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- M 272316 CLASS 80 b. GROUP

BERNARDUS de BAS in HAAG, Holland.

Addendum to patent 271359.

Patented in the German Empire on June 6, 1912. Longest duration: June 5, 1927.

In contrast to the method according to the main patent, according to which the brick is in use a wet processed head layer are prepared in accordance with the present Invention of colored relief brick made of cement using a dry processed Head layer produced using the two-stage pressing process of the main patent finds.

Methods are already known in which a dry top layer with a wet backfill layer has found use for the production of patterned bricks with a surface shaped in relief.

Up to now, however, since the two-stage pressing was not known, one had to do exactly that make sure that the relief followed the lines of the color pattern if you didn't want to go through the relief distort or otherwise impair the colored pattern.

So put a factory next to each other smooth and relief cement stones of the marked Type with the same color pattern, it was once limited in the type of relief in the individual pattern. On the other hand a special relief shape had to be made for each color sample.

Of course, this only applied to good, careful execution. It can only be about such therefore act in the present case.

According to the present method there is no dependency relationship between colored Pattern and relief shape present, so that the hollow relief shape is present in all Color swatches can be used.

It is according to the present two-step pressing process before the first pressing the colored pattern worked into the dry top layer in a shape with a smooth bottom; then in a second press During the process, the reliefs are pressed on by a die that contains the ribs in hollow reliefs.

As with the main patent, the pre-pressing on a smooth mold base on the one hand the color pattern is formed with sufficient certainty and on the other hand for the correct equalization the moisture is taken care of through the entire thickness of the stone. The paint layer is therefore neither too damp nor too dry for relief pressing.

Appropriately, one can proceed in the following way when carrying out the new procedure:

On the smoothly polished bottom of a form, a very little moistened, almost dry layer of cement with the addition of dye and spread this layer with backfilled with a damp mixture of cement and sand. Thereupon the whole mass is put under a pressure of sufficient strength

subject. After the pressing, which is conducted in such a way that the pressed mass with the Hand in the second form with a relief, e.g. B. over ribbed or flaky floor, the pre-pressed brick is pressed again in this form.

After removal from the latter form, after a preliminary hardening, the brick is z. B. after about 24 hours, placed in water and then set up for a few weeks to harden.

Claims (1)

Patent claim:
A method of molding colored cement stones in relief, which are to be pressed from a dry applied pattern and a wet backfill layer, characterized in that the stones are pressed according to the two-stage process according to patent 271359, the second form hole being independent of the lines of the colored pattern Relief shows. Serlin. printed in the reichsdruckeret.