Abstract: A heat sensitive transfer recording medium is disclosed, which is excellent in the heat-transferability onto a large variety of paper surface and is suitably usable for repetitive printings. The recording medium comprises a subbed support and a heat fusible coloring material layer which contains at least one compound having a plurality of polar groups and/or polar bonds selected from the group consisting of a hydroxyl group, an amino group, an imino group, a carboxyl group, an ester bond, an ether bond, an urethane bond and an amino bond.

Abstract: The improved thermal transfer recording medium capable of multiple printing has at least two heat-fusible colorant layers formed in superposition on a support and a heat-fusible colorless layer is provided between the heat-fusible colorant layers. This recording medium is capable of producing a sharp, ghost-free image through many cycles of printing operation.

Abstract: An apparatus for transferring an ink pattern image from a thermal transfer medium having an ink layer onto an image receiving medium. The thermal transfer medium is pressed against the image receiving medium and is conveyed together with the image receiving medium to a printing head and to a separating roler, in that order. A heater is provided to heat the thermal transfer medium so that it is at a given temperature when it is separated from the image receiving medium.

Abstract: There is disclosed a thermal transfer recording medium comprising a support, two or more coloring agent layer and optionally an intermediate layer, wherein one of the coloring agent layers contains a first heat-fusible substance selected from the group consisting of animal waxes, plant waxes, mineral waxes, petroleum waxes, synthetic hydrocarbon waxes and modified waxes and a layer adjacent to the coloring agent layer containing the first heat-fusible substance which contains a second heat-fusible substance which is immiscible with the first heat-fusible substance.According to the thermal transfer recording medium of the present invention, transferred images with constant transfer density can be obtained with an application energy at a certain level or higher and constant printed letter quality can be obtained for multiple times without being influenced by the subtle change in the application energy.

Abstract: Disclosed is a resin composition for heat-sensitive transfer recording medium, comprising (A) a silicone resin and (B) at least one resin selected from the group consisting of polyester resins, polyamide resins, cellulose type resins and acrylic resins.Disclosed is also a heat-sensitive transfer recording medium having at least one colorant layer containing a heat-fusible substance on a support, comprising a backing layer formed from (A) a silicone resin and (B) at least one resin selected from the group consisting of polyester resins, polyamide resins, cellulose type resins and acrylic resins provided on the surface of the support where no colorant layer is provided.The resin composition for heat-sensitive transfer recording medium of the present invention has sufficient heat resistance.

Abstract: A heat sensitive transfer recording medium is disclosed, which is excellent in the heat-transferability onto a large variety of paper surface and is suitable usable for repetitive printings. The recording medium comprises a subbed support and a heat fusible coloring material layer which contains at least one compound having a plurality of polar groups and/or polar bonds selected from the group consisting of a hydroxyl group, an amino group, an imino group, a carboxyl group, an ester bond, an ether bond, an urethane bond and an amino bond.

Abstract: Disclosed is a thermal transfer recording medium comprising (i) a support, (ii) an adhesion layer formed on said support and (iii) a heat-fusible colorant layer formed on said adhesion layer and containing a colorant and a heat-fusible substance; said heat-fusible colorant layer containing a polyoxyethylene type compound having in the molecule at least one polyoxyethylene chain moiety represented by --O--CH.sub.2 --CH.sub.2).sub.n wherein n is an integer of 2 or more.According to the medium of this invention, repeated uses are possible and images with high density can be obtained when a transfer paper with low surface smoothness or a transfer paper with high surface smoothness is employed.

Abstract: A thermal transfer recording medium comprising (i) a support, (ii) a heat-fusible colorant layer and (iii) adhesion layer between said support and said colorant layer; said adhesion layer containing at least one resin selected from the group (A) consisting of a polyurethane resin, a phenoxy resin, a polyester resin and a polycarbonate resin, and at least one copolymer selected from the group (B) consisting of a vinyl acetate copolymer and an acrylate copolymer. According to the medium of this invention, adhesive force between the support and the colorant layer can be consolidated and thus good pattern printing can be obtained without film peel-off for a large number of times even when applied power may be increased.

Abstract: A thermal transfer recording medium having a support and at least one heat fusible coloring agent layer superposed on said support, said heat fusible coloring agent layer comprising at least one coloring agent, at least one heat fusible substance and at least one polymer, wherein the concentration of said polymer in said heat fusible coloring agent layer varies over said layer with highest concentration thereof being present in the portion of said layer most nearly adjacent said support.