TH2474A - A rotary multi-color printer used to print both sides of a roll or sheet of paper in multiple colors simultaneously. - Google Patents

Abstract

The printer can print on both sides of the paper. This may be a parallel color image using raised inked plates in sequence with ink reservoirs, which are then inked by selected color reservoirs, with two reservoirs corresponding to the number of colors. Or it may be a superimposed color image and pattern using printing plates that act as ink reservoirs for the selected colors, and printing plates inked with corresponding offset ink reservoirs, with the number of plates corresponding to the colors and pattern. Or it may be a combination of all the types described above. For this purpose, the printer consists of a first pair of cylinders, which may function as either ink reservoirs, each adjusted to inked by the raised inked plates, with the image transferred through the central cylinder to another cylinder of the second pair onto the paper; or as offset cylinders that contact other cylinders; or one cylinder acting as an ink reservoir and the other as an offset cylinder, in all cases, the paper passing between the cylinders of the second pair. Multi-color printing on both sides can be completed by single-color wet offset printing.

Claims (3)

1. A rotary printing press to print both sides of a roll or sheet of paper in multiple colors simultaneously, particularly noteworthy for the secure areas of financial documents and especially banknotes, consists of a first pair of cylinders (2,12) around the perimeter of each cylinder is a group of multiple cylinders (8,18), each inked by an ink device 9,19 in a different color and tuned to work in conjunction with the corresponding cylinder (2,12) of the first pair mentioned, to apply the multi-color image there. Along with each cylinder (2,12) is a printing plate (5,15) with an embossed plate (5a,15a) representing the complete design to be printed and prepared to be inked by the corresponding cylinder (2,12). It also consists of a second pair of cylinders (7,17) working in conjunction, each cylinder relating to one cylinder (2,12) of the first pair and positioned to transfer the corresponding multi-color image to one side or the other. One of the papers passed between the aforementioned cylinders (7,17) of the second pair is unique in that the printer can perform different printing methods by arranging different types of interchangeable or replaceable components as follows: a) Each group's cylinder is a color-selective cylinder (8,8a; 18,18a), in which the patterned areas correspond to the parts of the image to be colored in different colors and their number corresponds to the number of colors to be printed. - Two cylinders (2,12) of the first pair are located away from the corresponding cylinder (7,17) of the second pair and act as ink collection cylinders to ink the relief plate (5a,15a) in sequence. The plate then transfers the image to the corresponding cylinder (7,17) of the second pair in such a way that a multi-colored image is printed on both sides of the paper. - The transfer of ink from the cylinder (2,12) of the first pair to the corresponding cylinder (7,17) of the second pair occurs across the paper. a. The cylinders of each group are plate cylinders (8,8b; 18,18b), each containing a printing plate. The number of such printing plates for each group differs with the number of colors and patterns to be printed. - The first pair's sleeve cylinder (2,12) fits into the corresponding sleeve cylinder (7,17) of the second pair. - The embossing cylinder (5,15), like the central cylinder (6,16), which has no printing function, is placed at a distance from the first pair's sleeve cylinder (2,12) and from the corresponding sleeve cylinder (7,17) of the second pair, in order to print the overlapping colors and patterns on both sides of the paper using several such printing plates (8b,18b). c) The cylinder of one group is a color selection cylinder (8,8a or 18,18a), the raised areas of which correspond to the parts of the image to be colored with different colors and their number corresponds to the number of colors to be printed. The cylinders of another group are printing plates (18 or 8), each containing a printing plate (8B or 18B). The number of such plates corresponds to the number of colors and patterns to be printed. One of the two cylinders (2,12) of the first pair is located away from the corresponding cylinder (7,17) of the second pair and is in contact with the color selection cylinder (8,8A or 18,18A) and acts as an ink reservoir to inject ink into the corresponding relief plate (5A or 15A). The subsequent relief plate then transfers the image to its corresponding cylinder. (7 or 17) of the second pair, so that the multi-colored image is printed on one side of the paper - Ink transfer from the first pair's cylinder (2 or 12) to the corresponding cylinder (7,17) of the second pair occurs throughout the corresponding printing plate (5 or 15) through the intermediate rubber cylinder (6 or 16) - The first pair's slip cylinder (12 or 2) contacts the printing plate cylinder (18b or 8b), as well as the corresponding cylinder (17 or 7) of the second pair, so that the multi-colored image and various patterns are printed on the other side of the paper - Other embossing cylinders (15 or 5), as well as other intermediate cylinders (16 or 6), have no printing function and are located away from the corresponding cylinder (12 or 2) of the first pair and the corresponding cylinder (17 or 7) of the second pair. 2. The printing press according to claim 1 is characterized by the fact that it also consists of one offset printing unit on at least one side, specifically a wet offset unit (10,11,11a.20,21,21a), which has a printing plate (10,20) in contact with the corresponding casing (7,17) of the second pair. 3. The printer under claim 1. or 2. is characterized by the fact that it is intended to have a dual ink system for relief plates (5,15) using two transfer cylinders (3,4,13,14) as important (3 claims, 6 figures).