DE861256C - Fixing a printing form on a base - Google Patents

Description

Fastening a printing form on a base For the production of For multi-color printing it is necessary that the printing forms are suitable for the various Colors are unlocked in the sentence board in such a way that the different colors correctly register.

Arranging the clichés in the right place takes a lot of work, because one can find out the correct position of the printing forms through repeated attempts got to.

Various devices are already available for eliminating this Difficulty designed. They are all based on the fact that on a celluloid or Cellulose hydrofoil plate, which can be folded away and connected to an adjustment frame, an imprint of the cliché is made. The mounting of the various clichés on their cliché blocks either on or in the setting frame, whereby they are fixed in such a way that they exactly match the imprint on the transparent, folded down carriers are registering.

Shifting the stereotypes until they are in the right place on the Taking a block is not easy. It is used according to a known method for this purpose a special device in which rows of holes are provided, through which you can attack the cliché with needles. Furthermore, the cliché blocks would be to unlock already in the frame with filling material and wedge locking tools.

According to the invention, one works exactly the other way around by removing the clichés not attached to the blocks; but the blocks on the clichés, which then naturally lie with the lower side up. Turn the stereotypes around right away on a set ship intended for this purpose "so @ that the setter takes them in the same Way like all other sentence forms.

According to the invention, this is achieved by making an impression makes the printing form on a transparent carrier, at least on this image carrier cuts a right angle and then attaches the image carrier to a transparent one Mounts plate in such a way that the image is facing away from this plate and the right one Makes angle with a right angle of the plate register. Thereupon the printing form attached to the plate, with the image facing the impression, the Image on the printing form with the help of a behind or under the transparent plate arranged mirror is made in register, whereupon the pad, preferably in a known manner with the help of an adhesive on the back of the printing form is attached.

The invention is illustrated below with reference to the drawing, in which an exemplary embodiment a device for carrying out the method according to the invention is shown, explained in more detail. In this drawing, Fig. I shows a partially opened box for mounting the cliché and FIG. 2 a side view of this box in the state of use.

The box i has side walls 2 which can be pivoted to the side and is on the Front closed by means of a roller shutter 3.

The upright part 4 of the box has 5 compartments in which the document parts (cliché bullet or wood) are kept.

The box is still with a glass plate in frame 6, which after Can be folded away at the top, as well as the mirror 7, which is a tube lamp 8 carries.

It is assumed that a two-color print is to be made, e.g. B. of blue and yellow.

You then first take an imprint of both clichés: auf .unter known commercially as cellophane or triacel foils. Need these prints not to be blue or yellow, but can simply be black .. for the sake of simplicity they are referred to below as blue or yellow imprints.

After the prints have been made, they are placed on a Zinc plate, which is located under the mirror 7, registering one on top of the other.

Then you cut with a knife: a right angle on this one transparent set. Each of the prints therefore has a right angle. If you lay these right angles registering one another again, so does the picture the blue print register with that of a yellow print. Thereupon lays make the blue or yellow imprint with the picture above with the one cut on the right Angle in the right-cut angle of the plate frame 6. On this imprint the blue (yellow) cliché is now placed with the picture below, in such a way, that the images of imprint and cliché close one another; what to help with watch the mirror 7. can.

If the images close together, the cliché is temporarily attached on the glass plate 6, e.g. B. by means of two pieces of adhesive plaster, whereupon the Pad - can be glued at right angles to the back of the rubber latex made clichés sticks.

The printer now has two clichés that are related to each other Make the register turn when you look at it instead of in the right angle of the plate frame 6, arranged at a right angle to the setting frame.

The printer can now, using the same system bars, Without any effort, it has more colors printed exactly over each other, of course the invention also has advantages when a monochrome cliché is attached to a base shall be.

Claims (3)

PATENT CLAIMS: - i. Procedure. for fixing, a printing form on a base, characterized in that, one makes an impression of a printing form on a transparent carrier, at least a right angle cuts this image carrier, then attaches the cut image carrier to a transparent plate in such a way that the image is turned away from this plate and the right angle makes register with the right angle of the plate, then the printing form with the image is attached to the plate upside down, with the image on (the printing form with the help of a placed behind or under the transparent plate Mirror is brought into register position, and finally the base, preferably in a known manner with the aid of an adhesive, attached to the back of the printing form. 2. A provided by the method of claim i with a pad Printing form. 3. Apparatus for carrying out the method according to claim i, characterized by a transparent, preferably foldable carrier, opposite it Rear a preferably foldable mirror is arranged, with between a light source can be arranged on the carrier and the mirror.