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US 5,781,210 AGranted
Recording method and recording solution
AssigneeSony Corporation
InventorsHideki Hirano, Hiroyuki Shiota, Shuji Sato, Kenji Shinozaki
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AssigneeSony Corporation
InventorsHideki Hirano, Hiroyuki Shiota, Shuji Sato, Kenji Shinozaki
Estimating the term…
A recording method of ink jet system which employs a recording solution composed of a dye which vaporizes more than 90 wt % upon heating at a temperature above 300.degree. C., leaving residues in an amount less than 10 wt %, and a solvent having a boiling point higher than 150.degree. C. which dissolves or disperses the dye more than 5 wt % at a temperature below 50.degree. C., the recording solution being heated at the time of recording by the recording solution heating unit which has a porous structure formed thereon which is composed of fine parts whose dimension in the plane direction is 0.2-3 .mu.m and whose dimension in the direction perpendicular to the plane direction is 2-15 .mu.m. This recording method makes use of the advantage of both the thermal transfer system and the ink jet system. Thus, it realizes a high resolution and a gradation within a picture element, produces high-quality images promptly, permits the printer to be made small and light, involves no waste materials, permits printing on plain paper, and needs a less amount of power and running cost.
An improved recording method including the steps of feeding a recording solution to a recording solution heating unit, heating the recording solution to change its state, making the recording solution into droplets, and transferring the droplets to a recording medium placed opposite to the recording solution heating unit, said recording solution being composed of a recording material and a substance which dissolves or disperses the recording material therein, characterized in that said recording solution heating unit has a porous structure formed on the front thereof, said porous structure being composed of fine parts whose dimension in the plane direction is 0.2-3 .mu.m and whose dimension in the direction perpendicular to the plane direction is 2-15 .mu.m, and that said recording solution is composed of a dye which vaporizes more than 90 wt % upon heating at a temperature above 300.degree. C., leaving residues in an amount less than 10 wt %, and a solvent having a boiling point higher than 150.degree. C. which dissolves or disperses the dye more than 5 wt % at a temperature below 50.degree. C.
A recording solution which is composed of a recording material and a substance capable of dissolving or dispersing said recording material and which is supplied to the recording solution heating unit and made into droplets there by heating so that the droplets are transferred to the recording medium placed opposite to the recording solution heating unit, characterized in that said recording material is a dye which vaporizes more than 90 wt % upon heating at a temperature above 300.degree. C., leaving residues in an amount less than 10 wt %, and said substance is a solvent having a boiling point higher than 150.degree. C. which dissolves or disperses the dye more than 5 wt % at a temperature below 50.degree. C., the dye being selected from the group consisting of a disperse dye and a solvent dye, the solvent being selected from the group consisting of an aromatic ester and an aromatic hydrocarbon.
An improved recording method including the steps of feeding a recording solution to a recording solution heating unit, heating the recording solution to change its state, making the recording solution into droplets, and transferring the droplets to a recording medium placed opposite to the recording solution heating unit, said recording solution being composed of a recording material and a substance which dissolves or disperses the recording material therein, characterized in that said recording solution heating unit has a porous structure formed on a horizontal surface thereof, said porous structure being composed of a plurality of parallel upwardly protruding structures, the upwardly protruding structures each comprising an elongated horizontal cross section having a width ranging from 0.2 to 3 .mu.m and a length ranging from 0.5 to 3 .mu.m, the width being shorter than the length, the upwardly protruding members being spaced apart from one another by a distance ranging from about 0.5 to 3 .mu.m and having a height ranging from 2 to 10 .mu.m, the upwardly protruding members being arranged in arrays of three or more rows and three or more columns, and that said recording solution is composed of a dye which vaporizes more than 90 wt % upon heating at a temperature above 300.degree. C., leaving residues in an amount less than 10 wt %, and dialkyl ester phthalate (as a solvent) having a boiling point higher than 150.degree. C. which dissolves or disperses the dye more than 5 wt % at a temperature below 50.degree. C.
Dependencies are inferred from the claim text.