Dai Nippon Printing Co., Ltd.

Dai Nippon Insatsu Kabushiki Kaisha

Minoru M Furuse

Mineo M Yamauchi

Hitoshi Saito

Hiroshi H Eguchi

Masaki M Kutsukake

Satoru Kawai

Yoshihiko Tamura

Takumi Horii

Katsuyuki Oshima

Hideaki Sato

Hideo H Fujimura

Jumpei J Kanto

A web take-up roll including a cylindrical body and a web taken up around the cylindrical body. A terminal portion of the web is joined to the cylindrical body through a double-coated tacky tape including a paper substrate and adhesive layers formed on both sides of the substrate. The substrate is capable of ply separation by a force smaller than a force required to separate adhesive faces of the adhesive layers from either the terminal portion of the web or the cylindrical body.

Web take-up roll

A thermal transfer image-receiving sheet is provided which is, in use, superimposed on a thermal transfer sheet and can form a printed, recorded image, having excellent storage stability, with a high density and a high resolution. The sheet includes a substrate and an intermediate layer and a receptive layer formed in that order on at least one surface of the substrate, wherein the intermediate layer contains a polyurethane resin having a specific glass transition temperature of 40.degree. C. or above.

Thermal transfer image-receiving sheet

A medical image forming method including, the steps of superposing a three-primary-color thermal transfer sheet and an image receiving sheet, the thermal transfer sheet having a base film and three color dye layers of yellow, magenta, and cyan, each of the dye layer; being composed of a dye and a binder, the image receiving sheet having a dye accepting layer heating the rear surface of the thermal transfer sheet with a heating device in an image shape; and driving and controlling the heating device with a control unit so as to form a full color image on the image receiving sheet. The control unit is adapted to compensate tones of the image so that chromaticity values thereof formed on the image receiving sheet are in a region defined by four points of (a*=0, b*=0), (a*=20, b*=-5), (a*=18, b*=15), and (a*=0, b*=15) when an achromatic color signal is input and L*=80. According to an aspect of the present invention, the control unit is adapted to compensate tones of three primary colors so that the density graduation of light red of an image in accordance with a light red signal sent to the control unit becomes high and thereby the low density region (light region) of the image formed in accordance with a achromatic color signal becomes reddish. According to another aspect of the present invention, since the dye layers are formed so that the light region becomes reddish and the dark region greenish, images where colors from light orange to light red can be easily distinguished are formed.

Medical image forming apparatus

This invention relates to a heat transfer sheet including a substrate film and a dye layer formed on the surface of the substrate film, the dye layer containing a dye and a binder resin and, if required, a release agent. The binder resin and/or release agent include a graft copolymer containing at least releasable segment selected from polysiloxane, carbon fluoride and long-chain alkyl segments grafted onto its major chain. According to this invention, there is provided a heat transfer sheet which enables an image of high density to be made at high speeds with neither adhesion between the dye layer and the dye-receiving layer nor peeling-off of the dye layer at the time of heat transfer and can produce an image on the surface of which a transparent film can be laminated.

Heat transfer sheet

A medical image forming method including the steps of superposing a three-primary-color thermal transfer sheet and an image receiving sheet, the thermal transfer sheet having a base film and three color dye layers of yellow, magenta, and cyan, each of the dye layer being composed of a dye and a binder, the image receiving sheet having a dye accepting layer; heating the rear surface of the thermal transfer sheet with a heating device in an image shape; and driving and controlling the heating device with a control unit so as to form a full color image on the image receiving sheet. The control unit is adapted to compensate tones of the image so that chromaticity values thereof formed on the image receiving sheet are in a region defined by four points of (a*=0, b*=0), (a*=20, b*=-5), (a*=18, b*=15), and (a*=0, b*=15) when an achromatic color signal is input and L*=80. According to an aspect of the present invention, the control unit is adapted to compensate tones of three primary colors so that the density graduation of light red of an image in accordance with a light red signal sent to the control unit becomes high and thereby the low density region (light region) of the image formed in accordance with a achromatic color signal becomes reddish. According to another aspect of the present invention, since the dye layers are formed so that the light region becomes reddish and the dark region greenish, images where colors from light orange to light red can be easily distinguished are formed.

Medical image forming method, forming apparatus of the same, and thermal

A heat transfer recording process which performs dotwise printing by means of a dotwise heating means. The process includes the use of a heat transfer sheet comprising a lubricating layer provided on one surface of a substrate film and a dye layer provided on the other surface of the substrate film, and an image-receiving sheet comprising a substrate film and an image-receiving layer formed thereon. The dynamic frictional coefficient at nonprinting between the dye layer of the heat transfer sheet and the image-receiving surface of the image-receiving sheet is within the range of 0.1-0.6.

Heat transfer recording process

A heat transfer sheet comprising a lubricating layer provided on one surface of a substrate film and a dye layer formed on the other surface, wherein the elastic modulus in at least one of the sub-scanning direction (MD) and the main scanning direction (TD) in said heat transfer sheet is 280 kg/mm.sup.2 or more, and the elastic modulus ratio MD/TD in the sub-scanning direction (MD) and the main scanning direction (TD) is within the range of from 0.8 to 1.3.

Growing community of inventors

Tokyo, Japan

Minoru M Furuse