DE442936C - Process for the production of printing types and printing blocks by pressing non-metallic, malleable materials such as wood, cellulose or the like. - Google Patents

Description

Process for the production of printing types and printing blocks by pressing of non-metallic, malleable materials such as wood, cellulose o. The like. The hitherto Processes used to produce letterpress types leave in most cases the types are created by casting, the types are occasionally made from the solid material milled out. Processes have also become known by which the types Stone wood can be pressed into matrices for molding. -With all of these has this Invention to do nothing. With the latter, in particular, because the press-fit der: let only to shape the typeface and to bring about the bond of the material is made.

A method is known according to which types are particularly strong Tops z. B. be made in such a way that one made of glass or plastic Material produced type image is subsequently attached to a wooden cone. However, this type of production is not cost-effective and has the disadvantage that it is not profitable in the later printing process (read the attached type image due to the high pressure liiseti can.

In accordance with the invention, a method is provided. which makes it possible resistant types and printing blocks quickly and cheaply and economically to manufacture.

The essence of this invention is that wood, Celltilose o. Like. According to iin essential known processes under high pressure, usually your multiple of the one to which the types are exposed in the later print runs into one existing die is pressed. This makes it such a great resilience achieves that types and printing blocks do not set during use, d. H. in the Cannot decrease the height.

Some embodiments of the invention are described below. The simplest method of preparation is the one given above, but it is advantageous to to make a few additions for practice.

To the types or printing blocks to moisture o. The like. Insensitive to make, glass to be used material, wood, gelulose o. The like., Before then Press out according to known methods, for example with the condensation products Soaked in phenols and formaldehyde. It is thereby after the finished treatment not only prevents moisture from penetrating into the wood fiber, but through the condensation product above, the wood fibers are insoluble glued together, so that there is a divergence of the finished types due to some kind of treatment is made impossible.

For subtleties and small typefaces in which the material is can not be easily memorized, the invention is supplemented by the fact that such, for example from your pure condensation products or from a mixture of the same with wood, Paper or other fiber flours are formed and the impregnated wood, cellulose The like occurs only as a carrier of the type or the printing block. the Such types or printing blocks can be produced as described below turn around. -An existing die of one type or a printing block becomes even with, for example, the condensation products of phenols and formaldehyde or one of its mixtures covered with fiber flour or a similarly reactive substance. The layer already containing the liquid condensation product is then applied to this layer or an impregnated material, such as wood or cellulose, which is similar in the end o. The like., placed in a certain strength. The mold prepared in this way is placed in the heated one Form press introduced and in compliance with the treatment regulations in question compressed to a part of its previous volume for the materials used. To achieve the highest effect when using the condensation products of phenols and formaldehyde, the press is set to about 170 ° during pressing C, and after the types have been removed from this, the molded types can still be used be subjected to further heat treatment.

How the subtleties can be shaped from the substances mentioned the same material can also be used for the surface of large types, namely here with the advantage that the printing surface becomes mirror-like and pore-free, without needing to be polished.

The lower surface, the foot surface of the type, can also be made of the material are formed. Type, use of wood to support the type can be done by the wood fiber lengthways to the type or as a so-called end grain, in which the fiber of the wood used is perpendicular to the type image. Will manufacture the types and printing blocks made with other impregnation and molding products, so changes The way of working changes accordingly. .

Claims (3)

PATENT CLAIMS: i. Process for the production of letterpress types and Printing blocks by pressing non-metallic, malleable materials such as wood, Cellulose or the like, which are impregnated with a substance according to known methods, which passes into an insoluble state after the finished treatment and thereby the fibers of the wood, the cellulose o. The like. Glued and fills their pores, - thereby characterized in that the pressing occurs under the multiple of the pressure which the types or printing blocks are ever exposed during printing. 2. Procedure according to claim i, characterized in that only the printing surface from the pure Condensation product of phenols and formaldehyde or one of its mixtures with Fiber flour or a similar acting substance is produced. 3. Procedure according to Claims 1 and 2, characterized in that the foot surface of the types or printing blocks - How @ the printing surface of the same according to claim: 2 is produced. q .. procedure according to claim z, 2 and 3, characterized in that the pressing of the wood, the Cellulose or the like, the production of the printing surface and the accommodation of the foot surface the type or the printing block takes place in a single pressing process.