CS247374B1 - Coloring apparatus with elastic elastic band - Google Patents

Abstract

The purpose of the solution is to ensure uniform and continuous application of ink to the printing form. The above-mentioned feature is achieved by means of a flexible belt /1/, which surrounds a hollow, thin-walled cylinder /2/ and zone control elements /3/ connected to micromotors /4/, which are supported in the ink chamber /6/ on a fixed, longitudinal, calibrated axis /5/, the task of which is to mix the ink /7/ and remove air bubbles from it. The ink layer is compacted after leaving the ink chamber /6/ by rolling rollers /9/ and spreading rollers /10/, which are located in a replaceable cartridge /8/. This system allows for automatic and continuous control of the ink supply /7/ to the form cylinder /14/. The ink dispenser also includes a tensioning device /16/ combined with a scraper knife /17/, which removes unwanted "color relief".

Description

(54) Ink-jet apparatus with elastic-elastic band (M) (Bl) (51) Int. Cl?

B41F 31/16

The purpose of the solution is to ensure uniform and continuous application of ink on the printing form.

Said shade is achieved by means of an elastic-elastic strip (1) which encircles the hollow, thin-walled cylinder (2) and the zone control elements (3) associated with the micromotors (4) supported in color (6) on a fixed, longitudinal, calibrated axis (5), the task of which is to mix the ink (7) and to remove air bubbles from it. Upon exiting the inking unit (6), the color seam is compacted by roll-on rollers (9) and spreading rollers (10), which are located in the replaceable tube (8).

This system allows you to automatically and continuously regulate the ink supply (7) to the mold roller (14).

Part of the inking unit is also a tensioning device (16) combined with a scraper blade (17), which removes undesired color relief.

«I / 1 l__ £ 3_ Ί5 16 17 7

The present invention relates to a inking apparatus with a resilient elastic strip, which provides a continuous supply of a regulated ink seam to the printing form.

At present, conventional inking units (cylinder assemblies) are known which, due to the large number of cylinders, have required a significant increase in their dimensions, great energy consumption and cost of their manufacture, as well as impair their operation.

In these apparatuses it is necessary to place a complex system of spreading and distributing rollers, by means of which the undesired effect of color relief, which negatively transmits the image of printing elements from the mold on the inking rollers, is eliminated.

In addition, inking apparatuses with a single roll-on roll having the same diameter as the mold roll are known. Around this roller, there are other small-diameter rollers, one of which receives color from the take-up roll in a continuous, wide color layer.

Some cheeks have scraper blades that remove color relief. The color relief assembly 11a of the rollers upon contact of these with the mold placed on the mold roll.

Other characteristic features of these inking units are: opposite rotation of individual cylindrical pairs; the funnel, which is formed by the arrangement of the pair of rollers, the individual roll drive, the regulation of the depth of the applied color seam to the mold by changing the relative velocities of the rollers in the inking unit and a circular cross section that helps to stir. paint to remove air bubbles.

Also of interest is the inking unit which can be used in small-format offset machines. Instead of the classic inking unit is designed cartridge with double-sided color tape, which are mutually. rewinds from one cylinder to another. The inking unit comprises only one roller, which has a porous coating into which the ink passes through the hollow axis. The inking bands with elastic-elastic band are also known.

The essence of the proposed inking apparatus with elastic-elastic band is to uniformly apply the ink to the printing form and is based on the fact that the infinite elastic-elastic band embraces the hollow thin-walled cylinder and micro-actuated zone control elements. On the sides of the hollow thin-walled rollers a replaceable cartridge with roll-on rollers and spreading rollers is adjacent.

The proposed inking system achieves: uniform and stable application of ink on the printing form, automatic regulation of the ink supply over the entire surface of the printing form, even at the furthest point of the mold, automatic switching off of the entire apparatus in case of machine failure, high sensitivity to changes in the automatic system control of ink supply, minimum time required to stabilize work after setting up the inking system or after starting the machine, eliminating the color relief effect on the roller, minimum power consumption of the inking unit, simple construction and permissible operation.

The attached drawing shows a schematic diagram of a inking apparatus with an elastic-elastic band.

The ink 2 progresses from the inking unit 6 without continuing on the elastic-elastic band 11f passing through the replaceable cassette 8, onto the mold cylinder 14. The elastic-elastic band 2 encircles the hollow thin-walled cylinder 2, which spins virtually the function of a single roller. This hollow thin-walled cylinder 2 is kinematically connected to the mold cylinder 14 so as to achieve the same peripheral velocities at the point of contact.

The required amount of ink 2 is discharged from the inking unit 6 by means of automatic ink supply control, which consists of zone control elements 3 which are connected to the micromotors 6, thereby achieving a very accurate adjustment of the depth of the color seam in the individual control zones.

The control elements 3 abut (abut) in the inking unit 6 on a rotatable, longitudinally calibrated axis 5, which at the same time helps to mix the ink 4 ^{and to} remove air bubbles from it. The required density level on the printout is automatically adjusted by the pulses passing from the control center to the automatic color control system for the micromotors 4.

In order to compact the color seam after it has been discharged from the automatic ink supply control zone, a replaceable cassette 6 comprising a set of rollers 2 ^and spreading rollers 10 is provided to the hollow thin-walled rollers 2 wrapped with a resilient elastic strip.

This cassette 8 can be exchanged for another containing a variable amount and arrangement of rollers depending on the printing intensity. The necessary pressing effort and locking of the removable cartridge 8 is provided by an auxiliary device 11.

The pressure of the hollow thin-walled cylinder 2, encased by the elastic-elastic strip 1, is effected by a pressing device 12. The locking device 13, if necessary, forces the hollow thin-walled cylinder 2 away from the mold cylinder 14.

The tensioning of the elastic-elastic band 1, which must be thin and accurately calibrated, is carried out by means of a tensioning roller 15 and a tensioning device 16. The tensioning roller 15 is combined with a scraper blade 1/7, the task of which is to wipe the so-called. color relief ”from elastic-elastic band 2 ·

The present invention has application in sheet-fed, web offset machines, as well as in letterpress roll machines.

Claims (1)

3 247374 The required amount of color 2 is produced from the inking unit 6 by means of an automatic feed control, which consists of zone control elements 3 which are connected to the micromotors 6, thus achieving a very precise adjustment of the color seam ridge in the individual control zones. The control elements 2 rest on the turnbuckle 6 on a rotatable, longitudinally calibrated 5, which at the same time helps to mix the paint Ί and remove the air bubbles therefrom. The required density of the printout is automatically adjusted by pulses that advance the control center to the automatic control system. for supplying color to the micromotors 4. To compact the ink seam after its outlet from the automatic ink supply control zone, a replaceable cartridge Q is provided to the hollow thin-walled cylinder 2 encircling the elastic-elastic strip, which includes a set of rollers 2 and rollers 10. This cartridge 8 can be exchanged for another, comprising a plurality of rolls and an arrangement of the rollers depending on the difficulty of printing. The necessary pressing effort and locking of the replaceable cartridge 8 is provided by the auxiliary device 11. The pressure of the hollow thin-walled cylinder 2 encircled by the elastic-elastic band 1 is performed by the push-through device 12. The locking device 13, if necessary, pushes the hollow thin-walled cylinder 2 away from the mold cylinder 14. Tensioning the elastic-elastic band 1 which must to be thin and precisely calibrated by means of a tensioning roller 15 and a tensioning device 16. The tensioning roller 15 is combined with the scraper blade 17, the purpose of which is to wipe the so-called "color relief" of the elastic-elastic band 2. application in sheet, disc offset machines as well as in book-printing discs. ARTICLE FITTING A parapet apparatus with a elastic-elastic strip, characterized in that the endless elastic-elastic strip (1) encircles the hollow thin-walled cylinder (2) and the zone control elements. 3 (coupled with micro-drives (4), with the rotatable, longitudinally calibrated axis (5) adhering to the zone control elements (3) and the hollow thin-walled cylinder (2) adjacent to the external control cartridge (8) with rollers / 9 / and rollers (10). 1 drawing