JPS61249756A - Recording apparatus - Google Patents

Abstract

PURPOSE:To promote hygroscopic drying effect by spreading emitted ink to the magnetizing direction thereof, in an ink jet type recording apparatus, by mixing a magnetic material with ink and arranging a magnetic member magnetized in the direction at a right angle to the emitting direction of the ink to the back surface side of a recording medium with respect to the ink deposited surface thereof. CONSTITUTION:A magnetic material is mixed with the ink emitted to a recording medium 1 from the nozzle 6 of the recording head 4 and a magnetic member 9 magnetized along the back surface side of the recording medium 1 opposed to the surface 4A of the recording head 4 is provided. For example, when the magnetic member 9 is magnetized with N-pole and a S-pole at the upper and lower parts as shown by a drawing, the magnetic ink droplet 10 emitted from the nozzle 6 is distorted in the direction of line of magnetic force thereof (up-and-down direction) as approaches the magnetic member 9. In such a state that the ink droplet 10 was deposited to the recording medium 1, said ink droplet 10 is further distorted to the direction of the line of magnetic force of the magnetic member 9 and the contact area with the recording medium 1 becomes wide to the up-and-down direction to accelerate the penetration speed of the ink droplet 10. As a result, an ink drying speed is accelerated even in a recording medium inferior to hygroscopicity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a recording device, and particularly to an inkjet recording device that performs recording by ejecting ink in dots.

[Summary of Disclosure 1] This specification and drawings describe a recording device that performs recording by ejecting ink in dots from a nozzle and landing it on a recording medium. By arranging a magnetic member that is magnetized in a direction perpendicular to the ejection direction of the ink on the back side of the surface on which the ink is to land, the ink can be distorted in the direction of magnetization on the surface of the recording medium.
This invention discloses a technique for promoting the moisture absorption and drying effect by spreading ink in that direction.

[Prior Art] In recent years, with the advancement of information technology, the development of peripheral devices centered on computers has become active.In particular, various studies have been conducted regarding recording devices, and recent market demands include: There is an urgent need to reduce noise and improve quality. Further, as recording apparatuses suitable for meeting these requirements, those using a value-order transfer method and an inkjet method are mainstream.

FIG. 3 shows an example of a conventional inkjet recording apparatus of this type, where (2) is a feed roller 2. A recording medium 1 is held at a position opposite to the recording medium 1, and a recording rod 4 is provided which is movable along a guide shaft 3 parallel to the roller axis. It is moved in the direction of the arrow by the wire 5 driven by.

Furthermore, a plurality of ink nozzles 8 are arranged on the surface 4^ of the recording head 4 facing the medium 1, and piezo-type on-demand type ink nozzles 8 are arranged inside the head 4 corresponding to these nozzles 6. In the case of a bubble jet type on-demand type, a heating element is provided (not shown), and the ink guided from the ink tank 7 is ejected by these elements. Recording is performed by landing the ink on the recording medium l. Note that these elements are connected to an external control circuit by a flexible cable 8 and are selectively controlled.

[Problem to be Solved by the Invention 1] However, such inkjet and thermal transfer recording devices have a major drawback in that the recording quality varies depending on the quality of the recording paper that is the recording medium. In the case of the shed type, the quality of recording tends to be impaired due to ink diffusion, for example,
Although the ink ejected from the ink nozzle is spherical and has a diameter of about 80 mm, after this droplet lands on the recording medium 1, the diameter of the dot becomes 30 mm due to diffusion of the ink.
It can be around 0 μ layer.

This problem is not a problem if the recording medium has relatively good hygroscopicity, but with recording media with low hygroscopicity, it takes time for ink to penetrate, and if you touch the surface with your finger immediately after recording, it may cause problems. Unpenetrated ink was causing problems by getting on hands and smearing records.

SUMMARY OF THE INVENTION An object of the present invention has been made in view of the above-mentioned drawbacks, and it is an object of the present invention to provide an inkjet recording device that can absorb ink without being affected by differences in hygroscopicity of the surface of the recording medium. It is in.

Means for Solving Problem L] That is, the present invention is a recording apparatus that performs recording by ejecting ink in dots from a nozzle and landing it on a recording medium. The device is characterized in that a magnetic member magnetized in a direction perpendicular to the ink ejection direction is disposed on the back side of the surface on which the ink lands.

[Function] In the recording device configured as described above, the ejected dot-shaped ink is distorted in the direction of magnetization of the magnetic member as it approaches the recording medium, and is spread in that direction, thereby producing a moisture absorption and drying effect. can be promoted.

[Example J Hereinafter, an example of the present invention will be described in detail and specifically based on the drawings.

FIG. 1 shows an embodiment of the invention. Here, the recording head 4 is the same as that shown in FIG. A member 8 having the following characteristics is provided. In this embodiment, the magnetic member No. 8 feed roller 2 is a separate member, but the feed roller 2 is connected to the magnetic member 9.
may also be used.

Next, the behavior of ink droplets discharged during recording will be explained with reference to FIGS. 2A to 2C.

FIG. 2A shows the state immediately after the magnetic ink droplet 10 is ejected from the ink nozzle 6 of the recording head 4, where the magnetic member 9 has N and S poles above and below, for example, as shown in the figure. It is magnetized like this.

Now, when the magnetic ink droplet 10 flies from the state shown in FIG. 2A to a position close to the recording medium 1 and reaches the state shown in FIG. It becomes distorted in the direction (up and down in the figure).

In this way, when the magnetic ink droplet 10 lands on the recording medium 1, as shown in FIG. By widening the area, the permeation speed of the magnetic ink droplet 10 can be increased even if the recording medium 1 has poor hygroscopicity.

As a result, even if the recording medium has poor hygroscopicity, the drying speed of the ink is increased, and even if the recording medium is touched immediately after recording, there is no risk of staining hands and fingers with ink or degrading the quality of recording.

[Effects of the Invention] As explained above, according to the present invention, in a recording apparatus that performs recording by ejecting ink in a dot shape from a nozzle and landing it on a recording medium, a magnetic material is mixed into the ink. , a magnetic member magnetized in a direction perpendicular to the ink ejection direction is disposed on the back side of the landing surface of the recording medium where the dot-shaped ink lands, so that the ink is directed in the magnetized direction on the surface of the recording medium. It can be distorted and the ink can be spread in that direction to promote the moisture absorption and drying effect.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the configuration of the main part of the recording apparatus of the present invention, and FIGS. 2A, 2B, and 2C each show the behavior of magnetic ink ejected from the nozzle over time during recording. The explanatory diagram, FIG. 3, is a perspective view showing an example of the configuration of the main parts of a conventional recording apparatus. l...Recording medium, 2...Feed roller, 3...Guide shaft, 4...Recording head. 4A... Opposing surface, 5... Wire, 6... Ink nozzle, 7... Ink tank, 8... Flexible cable, 8... Magnetic member, 10... Magnetic ink droplet.

Claims (1)

[Claims] In a recording device that performs recording by ejecting ink in dots from a nozzle and landing it on a recording medium, a magnetic material is mixed into the ink, and the ink is placed on the back side of the surface of the recording medium on which the ink is to land. A recording device comprising a magnetic member magnetized in a direction perpendicular to the ejection direction.