DE1571842A1 - Device and process for precise two-color printing using the screen printing process - Google Patents

Description

Device and method for precise two-color printing using the screen printing process.

The invention relates to a method for multicolored printing of Rotary bodies in the screen printing process with machine feeding and delivery of the Good to print.

Screen printing is becoming more and more popular because of its simplicity Found practice. The procedure is based on the fact that a partially covered, Fine-meshed gauze is painted one color using a squeegee, so that the under the uncovered areas of the stencil on a surface arranged print material can be provided with color. Let such screen printing stencils in the usual way, both graphically and photographically Also produce way for multi-color printing.

In the case of smaller quantities, the decorations are applied to the Known manual or semi-automatic machines have already been used for printing. In this In this case, one color is applied after the other, with each color a printing process requires. For this purpose, the print material must be provided with so-called grid points, so that images that are precisely superimposed can be achieved with their help. As is known, the use of thermo-liquid inks in glass printing means that the Ability to have several prints follow one another without blurring of the previous print.

It has now been found that at high performance, especially when printing of hollow bodies a high level of precision in the print image by coupling two printing stations is achieved. The well-known devices used for printing in screen printing are based on a chain transport, in which a respective release of the printed matter must be done after each print. This in turn demands the print material to be provided with raster marks, which enable repeated positioning of the print.

The printing device preferably used to carry out the new process, which is equipped with a multiple turret head and planetary grid element, is characterized according to the invention in that 2 bodies at the same time can be printed in one plane and in the same direction. The unwinding of the body is self-indulgent for both simultaneously printed body and the printing screen, what by a planetary drive takes place, which only by means of a control gear, which has the diameter of the print material is adapted, is driven. In this device makes the Pick-up turret each time its intermittent movement. However, set after expiry both printing screens simultaneously mowed one behind the other in action. In the run the sieve, the synchronous flow of the printed matter is carried out by the planetary drive, which drives the control gear in the same direction through the rack of the sieve element.

A preferred embodiment of those used according to the invention The device is described in the following part of the description with reference to the drawings. In the drawings, Fig. 1 is a side view with visible. Turret, planetary drive and its drive from the sieve element, Fig. 2 is a plan view of the device, in which the division of the turret head and the simultaneous drive -by a gear of the planetary drive can be seen from the coupled double pressure screen.

The printing device shown has a fixed gear box (K) in which the entire drive, the intermittent gear for the turret head, as well as pushing and lifting elements for screen and squeegee are installed.

On the protruding shaft (11) of the turret head (1) is also the planetary drive (2) stored. The actual object recordings (3) with the planet satellites (5) are equipped, are exactly stored in the turret (1). On the object mounts (3) or between them and any counter bracket is the print item (4). The one hung in a corresponding structure The sieve guide (12) carries the exchangeable as required through the brackets (13) Double pressure screen (1o). On the opposite side is the rack (9) of the grid control permanently mounted for multi-color printing. The rack (9) fully engages the control gear (8) through which the drive, which is synchronous to the pressure screen, is via the planetary drive (2, 5, 6, 7) for the individual object recordings (3). The requirement of this Invention is that two parts to be printed (4) on the recordings (3) in lie on a common plane - and so the printing takes place with 2 coupled printing screens can.

The mode of operation and the workflow of the new method can best be seen in relation to the grid in the drawing in FIG. 1 and in relation to the printing position in FIG. Figs. 1 and 2 show the device in the printing process. In the printing position, the double printing screen (1o) lies simultaneously over two receptacles (3) equipped with printing material (4). The first print is carried out in position (A) through the two squeegees (14). The second color is applied at the same time in position (B). When the turret head (1) is transported further, during which time the printing screen (1ö) is stationary, the planet gear (2) rolls on the pinion (6). At the same time, the satellites (5) of the drive roll over the second disk of the planetary wheel (2) and hold the individual receptacles (3) in a predetermined position in relation to the printing position of the printing screen (1o). After the transport of the turret head (1) has ended, there are again 2 receptacles WA, B) under the printing screen (1o) in the initial printing position intended for precise printing and the first (A ) and second (B) prints are printed.

The pressure screen (1o) must be in its holder (13) in front of each Further transport must be raised so that the passage of the recordings (3, 4) is secured is. After finishing the printing process, when the screen (1o) has fully drained, the cycle repeats itself.

Although the individual movements are coupled with one another and with one another are synchronous, it can be seen that the device described is within the scope of the invention can be modified in many ways.-So, as already mentioned, the recordings (3) Receiving counter brackets or similar.

Claims (5)

1. A method of two-color, continuous, accurate register printing of glass bodies characterized in that two bodies (A / A. B), which are received by a turret (1), are simultaneously in a pressure plane. 2. Process for two-tone, continuous, precisely registered Printing of hollow glass bodies according to claim 1, characterized in that in relation on the recordings lying in one plane (3 / A, B) two consecutively placed Screen printing stencils (1o) are required. 3. Printing device for precise registration Two-color printing according to claims 1 and 2, characterized in that only one control gear (8) driven by a rack (9) firmly coupled to the pressure screen (1o) for the purpose constant positioning of the printed matter (4) to the printing screen (1o), one of which Gear (8) all control satellites (5) of the planetary drive (5, 6,7,8,9) driven will. 4. Apparatus according to claim 3, characterized in that the positioning of all recordings (3) and thereby also the recorded print material (4) by means of a Planetary drive (2,6,7,8) takes place via the control satellite (5). 5.Vorrichtung according to claim 1 and 2, characterized in that the pressure screen (1o) is raised in its holder (12, 13) for the purpose of passage of the receptacles (3).