JPH07508226A - inkjet printing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Inkgeno 1~Printing machine field of invention BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to printing devices and, more particularly, to inkjet printing devices.

'7-J' view of invention Inkjet and Fountain 1 printing machines are well known in the art.

This printing machine prints small drops of ink in a hot wax base or in a water base solvent. is ejected from the print head in an image-forming manner onto the paper or substrate of the pond. Ru. This substrate fixes the image on the substrate by evaporating a water solvent or dissolving a waxy ink. It may be heated to However, the image formed by the printing press is The flow of the base solvent or waxy ink being dissolved causes the ink to “bleed” onto the paper white. Wicking often results in some loss. Increase ink viscosity Attempts to correct this problem by using inkgeno or viscous ink The result was not particularly good because it did not work well.

Summary of the invention One object of the present invention is to use ordinary water-base ink or waxy ink to create paper-like prints. The present invention provides an inkjet printing device that produces 2";'j beautiful and unfading images on Is Rukoto. Another object of the invention is to obtain a very precise registration of color images or a multicolor image. To provide a printing device. The present invention relates to image formation and image transfer. The function of the inkjet head and the substrate is separated into two distinct stages. These objectives are achieved by interposing intermediate members in between.

In the first stage, the ink generator) ~ printing spatula) is normally used to form the desired image. Instead of the image being manipulated in the manner of : Formed on the surface of 4. In the second step, the image is moved from the surface of the intermediate member to the desired final Transferred to the base material. The intermediate part is filled with ordinary water to form the image of the sword. After using a non-stick ink, the image or intermediate area should be This gives the possibility of evaporating the desired amount of aqueous solvent when the material is present. water heath ink and waxy ink heating reduces system power requirements without excessive heating of the substrate to enable good transfer.

Intermediate intermediate members may also be used to apply resin or binder to the image prior to final transfer. This offers the possibility of improving fixation of the ink image and adhesion of the image to the substrate. .

Brief description of the drawing This “If” is summarized by the following detailed explanation given in connection with the attachment (=TI”ll). It has been well understood and its true value has been recognized, and here, FIG. 1 is a schematic diagram of an ink sheet printing apparatus according to an embodiment of the present invention. .

FIG. 2 is a schematic diagram of an inkjet printing apparatus according to an embodiment of the present invention. be.

Detailed Description of the Preferred Embodiment Next, reference is made to a general display of an inkjet printing apparatus according to an embodiment of the present invention. The first figure given is made. Microprocessors, as well known in the art, and others. An electronic imaging system with normal user-operated hardware and software. A control assembly 8 is included in the apparatus of FIG. Control assembly 8 is constructed as is well known in the art. niinkunenot□Printingheno1-, liquid ink, and other inkjet equipment and an inkgeno assembly 10 that includes an ink generator. It may be rigid, but preferably The tram 12, which has a surface 14 of elastomeric polymeric material, is an inksheet assembly. IIJ'l intervals are provided from 10 onwards. Surface 14 is preferably accessible to ink. Abhesive silicone, Noricon rubber or Teflon-like coated with a non-stick layer.

When the device is operated, the tram 12 rotates in the direction of arrow 13 and the control assembly 8 is an ink generator so that ink droplets adhere to the surface 14 in a desired image shape. ) - Apply inkjet to the assembly 10 so as to eject small droplets of ink toward the surface J4. is operable to provide appropriate control commands to the cut assembly 10. Advantages of the present invention According to a preferred embodiment, the surface 14 is heated by an internal heater 16 or by a blower (not shown). (without heat). The heater 16 is connected to the final base as described below. Solvent-based inks are used to prevent "wicking" of the image when transferred to the substrate. The liquid carrier of the ink can be operated to evaporate a significant portion of the liquid carrier.

After the ink image is deposited on surface 14, drum 12 continues to rotate and deposit the ink image on surface 14. The tinged surface is fed to the nip part 9 between the drum 12 and the imprinting roller 20. A final substrate 18, such as a web or net of paper, is brought into contact with the final substrate 18.

If surface 14 is slightly elastic, impression roller 20 is completely rigid.

However, if the surface 14 is solid, the imprint roller 20 will have a slightly elastic It should have a surface. As a result of the application of pressure at the interlocking part 19 between the two surfaces The ink image is then deposited onto the non-adhesive surface 1 as it is fed through the final substrate 18 or the nib. 4 to the substrate.

The inventor has proposed that the particular shape of the inkjet printing device described above or the conventional produces images on the final substrate that are superior to those produced by conventional inkjet equipment. I discovered that After an ink image is first created on the surface 14 of drum I2 The inkjet device of the present invention is capable of transferring only images to the final substrate. Effectively prevents “wicking” of solvent-based liquid inks when transferred to substrates. Ru. Heating the surface 14 causes a significant portion of the liquid solvent to evaporate prior to final transfer. Therefore, a very clean and dense image is transferred. As a result, transfer to the final substrate It is also not necessary to subsequently heat the substrate to fix and dry the image.

It is also recognized that the apparatus of the invention provides not only monochrome printing of images but also multicolor printing of images. It will be done. For printing multicolor images, the inkjet assembly IO can be used as is well known in the art. A number of inkjet subassemblies, one for each color to be processed, can be used to Each subassembly is coupled to control assembly 8. When tram 12 rotates, the sub-group Each of the solids is operable to deposit a monochromatic image on surface 14. intermediate member and The use of a 1' ram 12 as a 1' ram 12 produces a much more colored image than printing directly onto paper. Facilitates precise registration, which results in a significantly cleaner color image on the final substrate. Ru.

Reference is now made to FIG. 2 illustrating an inkjet printing apparatus according to another embodiment of the present invention. done to. The apparatus of FIG. 2 includes a drum 12 upstream of the inkjet assembly 10. FIG. It is similar to that of . In the space 26 between the squeegee roller 24 and the drum I2 is a polymeric binder with or without a predetermined amount of binder resin, preferably a solvent. There is. Binder resin within space 26 is replenished by dispenser assembly 28. It will be done. The squeegee roller 24 controls the rotation of the drum 12 as shown by the arrow 25. Rotating in the opposite direction, the ink image is applied to the surface 14 by the ink sheet assembly 1o. A controlled thin layer of binder resin is applied to the surface 14 prior to deposition. It is possible to act so as to The binder resin is used as an ink when the image is transferred to the final substrate. It acts to improve the fixation of images. In a preferred embodiment of the invention, the polymeric binder is , ink dye and/or final coating to improve image adhesion to the substrate and protect the image. [t: selected as possible. In an alternative embodiment, the scoop The image roller 24 can be replaced by a squee knob brake or other painting device. may be replaced.

A large number of materials are useful as polymeric binders in the present invention, and the choice is Ru.

It is recognized that the invention is not limited to the embodiments described above in connection with the drawings. It will be done. To the contrary, the invention is limited only by the scope of the following claims.

FIG.1 FIo, 2 Copy and translation of written amendment) Submission (Special Article 184) 8) April 1, 1994

Claims (13)

[Claims] 1. In a device that prints an image on a substrate, there is a moving member and a surface of the moving member. of the moving member by spraying droplets of ink in an image pattern onto the surface. a jet device that produces an ink image on a surface, and from the surface of the moving member to the substrate; and an image transfer device that transfers the ink image. 2. The apparatus according to claim 1, wherein the ink comprises a colored dye and a dye. carrier material. 3. The apparatus according to claim 1 or 2, wherein the moving member The device further includes a heating device that heats the surface. 4. The apparatus according to claim 3, wherein the heating device is a hot air blower. A certain device. 5. 4. The apparatus of claim 3, wherein the heating device device capable of evaporating a significant portion of the material. 6. In the device according to any one of claims 1 to 5, A device in which the moving member has a surface of resilient material. 7. In the apparatus according to any one of claims 1 to 6, The apparatus wherein the moving member has a surface that is ahesive to the ink. 8. In the apparatus according to any one of claims 1 to 7, The image transfer device includes a device for transferring the ink image to the substrate under heat and pressure. Equipment including. 9. The apparatus according to any one of claims 1 to 8, Depositing a layer of resin on the surface of the moving member prior to creating an ink image on the surface of the moving member. The apparatus further comprises a coating device. 10. The apparatus according to claim 9, wherein the coating device includes a squeegee roller. device containing a controller. 11. The apparatus according to claim 9, wherein the coating apparatus includes a squeegee. equipment containing radar. 12. In the device according to any one of claims 1 to 11, , an apparatus in which the jet device includes an inkjet device. 13. In the device according to any one of claims 1 to 12, , an apparatus in which the jet device comprises a foam jet device.