SU870197A1 - Ink feed device for jet printer - Google Patents

Description

(54) BLACKING DEVICE INK PREVENTIONALLY FOR INJECTION MAIL

one

The invention relates to an ink supply device and can be used to register an infoadjust with an inkjet-typewriter. A ink supply device is known, comprising a housing with an outlet and. inlet valves, an elastic reservoir mounted in the housing in front of the valves, and means for moving the bottom of the reservoir §) a 1.

A disadvantage of the known device is the impossibility of controlling the compressive force of the elastic reservoir, which adversely affects the print quality.

The aim of the invention is to improve the print quality.

The goal is achieved by the fact that the means for moving the bottom of the СO СTOi sr tank from an electromagnet, the core of which has a permanent magnet and a hole in the central rod, and a piston located in the core hole and connected to the bottom of the tank, while the coil of the electromagnet is fixed on the piston, and the tank is made of a non-expandable material. , FIG. 1 shows a printing unit from a mine-typewriter; on j

FIG. 2 - ink supply device for inkjet-typewriter, section.

The printing unit of the ink jet recording machine includes an inkjet head 1 with a control system 2, an ink tank 3 and an ink supply device 4.

The ink supply device (see Fig. 2) includes a housing 5 s.

10, a cover 6 and a guide nickle 7. The inlet 8 and exhaust 9 valves are located in the bore holes of the kryoika 6.

Sockets 10 are used as the control system 2 for connection.

On the flange of the krlik 6 by means of a spring band 11 is rigidly fixed by one end of the elastic tank 12, the other end (bottom) of which is rigidly fixed by the ring 13 on the flange 14 of the piston 15. At the other end of the porous 15 there is a coil 16.

25 A piston 15 is movably mounted in a bore of a magnetic core (core) 17, having an annular permanent magnet 18.

The device works as follows.

Pre-filling of ink capacity 3 and the entire system of the printing assembly is carried out, as well as the removal of air from it. Then, when the valve of the control system 2 is turned off, the ink supply device is turned on and the outlet pressure of the system is adjusted to the operating level, after which the device 4 is turned off. In this case, the piston 15 will be in the lower position (position in FIG. 2), and the tank 12 will be filled with ink. After these operations, the ink supply device may operate in automatic mode.

In order to implement the ink supply device 4, a voltage is applied to the winding of the coil 16. As a result of the interaction of the current in the coil 16, the turns of which are located in the opening of the magnetic core (core) 17 with constant magnetic fields, a pulling or pushing force occurs depending on the current direction in the coil 16. Under the action of this force, the movable coil 16 together with the piston 15 moves upward in the discharge cycle, and when the current direction changes - down into the suction cycle. The moments of switching on, reversing and turning off the power of the moving coil are determined by end sensors and a control circuit (not shown

Therefore, when applying current / direction-. The formation of which ensures the injection cycle, the bottom of the reservoir 12 from the lowest position, starts to move upwards in accordance with the movement of the moving coil 16 in the resulting magnetic field. A reservoir filled with ink and made of inert material of the material begins to change its volume, creating a directed ink flow at the device output. After passing through the control system 2, this ink flow reaches the exit from the inkjet head 1, where it is divided into droplets under the influence of signals arriving at the deflecting Electrodes and forms a sign on. information carrier.

With the supply of current, the direction of which provides the suction cycle

the piston 15 begins to move downward, restoring the initial volume of the reservoir, and the dynamic characteristics of the device allow the suction cycle to take place in a fairly short time, since the dynamic properties and stability of the pressure of this device are structurally determined by the minimum magnetic air gap (orifice) of the magneto ;; rovod and the same number of working turns of the coil in any of its position.

Therefore, the invention provides high stability and a large range of operating pressure.

5 The high dynamic response of the drive allows a quick start of the ink supply device. All this makes it possible to work in a wide frequency range and carry out high-quality registration of alphanumeric and graphic information. The long duration of the injection ensures the use of this device in

5 different inkjet machines.

Claims (1)

1. French Patent No. 2046599, CL F 04 B 43/00, 1971.