JPS5812772A - Non-impact recorder - Google Patents

Abstract

PURPOSE:To obtain a non-impact recorder capable of easily giving high-density printing without the need for electrode, etc., in front of the nozzles by using a system in which ink droplets not used in recording are discharged from an ink discharge port by operating an ink discharge vibrator before the ink droplets are formed. CONSTITUTION:Ink is supplied under a pressure from an ink supply port 20 and an ink supply vibrator 21 is vibrated with a given frequency. In case where the ink discharge vibrator 25 is not worked, ink droplets are jetted in a multiple manner from the nozzle port 24. An image recording signal is supplied to the ink discharge vibrator 25 and pressurized ink is discharged from an ink discharge port 27. At this time, ink droplets are not jetted from the nozzle port related to the ink discharge vibrator being operated.

Description

[Detailed description of the invention] The present invention relates to a novel non-impact recording device.

As non-impact recording apparatuses, a multi-on-demand type inkjet recording apparatus as shown in FIG. 1 and a multi-charge deflection type inkjet recording apparatus as shown in FIG. 2 have conventionally been proposed. However, the multi-on-demand inkjet recording device shown in FIG.
Since the vibrator 1 and the pump chamber 2 require a certain size, it is difficult to arrange the nozzles 3 at a high density. 1. In order to achieve high density, a configuration as shown in the figure has been considered, but it is necessary to be able to hear the flow path 4 for guiding ink to the nozzle 3, and in that case, the formation of the flow path 4 is ,
Although it can be easily processed by photo-etching or the like, it is extremely difficult to eject uniform ink droplets from each nozzle because the fluid resistance of each flow path is different. The multi-charged deflection type inkjet recording device shown in FIG. It was necessary to arrange charging electrodes, deflection electrodes, etc., and the configuration was complicated.

The present invention was made in view of the above-mentioned circumstances, and
In particular, the present invention aims to provide a novel non-impact recording device that does not require any electrodes or the like on the front surface of the nozzle and can easily increase the density of irises.

FIG. 3 is a diagram for explaining an example of the non-impact recording device according to the present invention, FIG. 20 is an ink supply port, 21 is an ink supply vibrator, 22 is an ink supply channel, 2
3 is a nozzle plate, 24 is a nozzle hole, B is an ink discharge vibrator, 26 is an ink discharge flow path, and 27 is an ink discharge port. 21 vibrates at a certain frequency.

Therefore, when the ink discharge vibrator 25 is not operating,
If the pressurized ink is not discharged from the ink discharge port 27, use a multi-purpose ink from the nozzle hole 24 (6 in the illustrated example).
), ink droplets are ejected. Here, if an image recording signal is supplied to the ink discharge vibrator 5, the ink discharge vibrator 5 is activated to discharge ink droplets that are not used for recording from the ink discharge port 27 before the ink droplets are completely formed. , ink droplets are not ejected from the nozzle holes associated with the activated ink ejection oscillators, and ink droplets are ejected only from the nozzle holes associated with the inactive ink ejection oscillators. Only the ink droplets used for recording can be ejected from the nozzle holes to perform desired recording. Note that the ink discharged from the ink discharge port is recovered by an ink recovery system (not shown) and used again for printing.

As is clear from the above description, according to the present invention, (1) The conventional multi-on-demand type shown in FIG.

Unlike inkjet recording devices, the ink supply path has the same shape and size, and a common (single) ink supply vibrator forms the desired number of ink droplets at once. Variations in the size, speed, etc. of ink droplets are extremely small, making it possible to form high-quality images.

(2) The nozzle arrangement can be made denser.

(3) Even if each ink discharge channel is bent to increase the density of the nozzle array, the ink discharge channel only has to perform one function, which is to discharge ink, so it is not possible to use the conventional multi-on-demand type. Unlike inkjet recording devices, the formation of ink droplets is not hindered by bending of the ink channels (because the shapes of the ink channels are different).

(4) Unlike the conventional multi-charge deflection type inkjet recording device shown in FIG. 2, an extremely simple non-impact recording device can be constructed without requiring complicated electrodes on the front surface of the nozzle.

There are advantages such as

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining an example of a conventional multi-ink on-demand type inkjet recording device, in which (a) is a side sectional view of the main part, (b) is a front view, and FIG. FIG. 3 is a sectional view showing an example of a charge deflection type inkjet recording device; FIG. 3 is a diagram for explaining an embodiment of a non-impact recording device according to the present invention; (a) is a side sectional view of a main part; FIG. , (b) is an overall perspective view. 20 ink supply port, 21 ink supply vibrator, 2
2 ink supply channel, 23 nozzle plate, 24 nozzle hole, 5 ink discharge vibrator, 26 ink discharge channel, 27 ink discharge port. Figure I ((7) tb+ Figure 2 4 , /, 15 0

Claims (1)

[Claims] A non-contact device characterized in that it has means for forming droplets at a constant frequency and means for preventing the formation of the droplets according to recorded information, and the formed droplets are used for recording. Impact recording device.