Printing – Intaglio – Bed-and-cylinder machines
Patent
1987-10-29
1989-06-27
Fisher, J. Reed
Printing
Intaglio
Bed-and-cylinder machines
B41F 900
Patent
active
048418579
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a thin-film forming apparatus for printing and forming various thin films such as crystalline liquid orientated film, photoresist film, crystalline liquid-filling seal, and insulation coating for a semiconductor device.
DESCRIPTION OF THE RELATED ART
In general, an offset printing method is the conventionally used method for printing a thin film onto materials such as paper. However, the offset printing method utilizes, as is well known, the non-hydrophilic property of the printing ink against dampening water; accordingly, the printing ink transferred from an ink-kneading roller requires resistance against being emulsified in the dampening water; and thus, the degree of ink viscosity is restricted to only a high viscosity ranging from 80,000 to 100,000 c.p.s.
Consequently, it has not been possible to print, for example, thin films requiring ink having a low viscosity ranging from approximately 4 or 5 to 30,000 c.p.s., such as crystalline liquid oriented film, photoresist film, and crystalline filling seal, onto thin materials such as a glass plate, a ceramic plate, and plastic film.
The applicant of the present invention has already provided a thin-film forming apparatus as shown in FIG. 16 (See Japanese first Utility Model Publication No. 170864/1983). According to this apparatus, an intaglio or gravure plate 32 having a multiplicity of ink calls arranged in a given pattern thereon, and material to be printed 33 are placed on a base body 31. A printing roller support 35 which supports a printing roller 34 and an ink-supplying device (not shown in the drawing), installed near the intaglio plate 32, for dispensing ink composed of a high polymer solution having a viscosity ranging from approximately 50 or 60 to 30,000 c.p.s. into ink cells of the intaglio plate 32, are arranged above the base body 31 so as to move between the intaglio plate 32 and the material to be printed 33. Furthermore, a doctor 36 which scrapes off excessive amount of ink filling the ink cells of the intaglio plate 32 is fixed to the printing roller support 35.
In this apparatus, after the excessive ink supplied from the ink-supplying device and into ink cells of the intaglio plate 32 is scraped off, the printing roller 34 is rotated while contacting the intaglio plate 32, and the ink disposed in the ink cells of the intaglio plate 32 is deposited in a given pattern on the surface of a soft synthetic-resin-made convex portion 34a formed on the surface of the printing roller 34. Then, the printing roller 34 on which ink is deposited, is moved onto the surface of the material 33 and the ink deposited on the convex portion 34a is printed onto the surface of the material 33 while the printing roller 34 is rotated; thus a desired pattern is formed on the material 33.
To fabricate the above-described intaglio plate 32, the intaglio plate 32 is composed only of a planar plate and a given pattern is directly formed on the surface of the plate. In such a case, the production cost is relatively great, and the plate must be totally replaced each time a patter is changed, thus resulting in especially complicated operating procedures. Therefore, in the conventional apparatus as described above, the intaglio plate 32 is constructed so that a transfer plate 32b is removably fastened on the upper surface of a surface plate 32a and the surface of the transfer plate 32b is coated with various thin plating; and thus, a given pattern is formed.
According to the above-described device, however, it is difficult to precisely and flatly arrange the transfer plate 32a over entire area of the surface plate 32a, and the upper surface of the transfer plate 32b tends to become warped, resulting in difficulty in maintaining, at a specified level, the contact pressure between the transfer plate 32b and convex portion 34a formed on the surface of the printing roller 34. Consequently, it is difficult to transfer a given pattern with a uniform thickness onto the convex portion 34a formed on the surface of the p
REFERENCES:
patent: 3098435 (1963-07-01), Flower et al.
patent: 3164088 (1965-01-01), Vechot
patent: 3842738 (1974-10-01), Terrazas et al.
patent: 4262034 (1981-04-01), Andersen
patent: 4503769 (1985-03-01), Andersen
Hashimura Yasuhiro
Minami Nobuyuki
Noguchi Satoshi
Fisher J. Reed
Nissha Printing Co. Ltd.
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