Abstract: A thermal transfer material comprising a support and an ink layer disposed thereon comprising a binder and a colorant, wherein the binder comprises 40-80 wt. % of an ethylene-vinyl acetate copolymer and 20-60 wt. % of a wax based on the total weight of the binder, and the ink layer has a breakdown strength of 30-80 kg/cm.sup.2 at 25.degree. C.

Abstract: A heat-sensitive transfer medium comprising a support and at least two heat-transferable ink layers including a first and a second ink layer. The first ink layer has relative adhesions with the second ink layer and the support which are reverse at a higher temperature from those at a lower temperature. When the heat-sensitive transfer medium is superposed with paper, a heat energy is applied, and the transfer medium is separated from the paper; the second ink layer is selectively transferred or both the first and second ink layers are transferred to the paper depending on the length of time from the heat application until the separation of the transfer medium, whereby two color images can be formed by a single transfer medium.

Abstract: A thermal transfer material suitable for two-color recording comprises a support and at least a first ink layer and a second ink layer disposed in this order on the support. The adhesion strength F.sub.1 between the support and the first ink layer and the adhesive strength F.sub.2 between the first and second ink layers satisfy the relations of F.sub.1 >F.sub.2 at a higher temperature and F.sub.1 <F.sub.2 at a lower temperature. The total ink layers on the support having a tensile strength of 8-20 kg/cm.sup.2. Two color recording is effected by superposing the thermal transfer material on plain paper, applying a pattern of heat and separating the thermal transfer material from the paper while changing the time from heating until the separation, i.e., temperatures at the time of separation. Sharp edge cutting of the heated portion is ensured by the definition of the tensile strength.

Abstract: Image recording is indirectly achieved on a recording sheet via an intermediate transferring medium. First, the circumferential surface of a rotatable transferring medium having heat-transferable ink contained therein is fused or softened in response to image information by means of a recording electrode which is disposed at the position opposite to the transferring medium while the intermediate transferring medium is interposed therebetween. After completion of the first transferring step the ink image which has been transferred onto the intermediate transferring medium is transported to the position where a second transferring step is achieved while the ink image is kept in the fused or softened state. The second transferring step is achieved in such a manner that the ink image is transferred onto the recording sheet under the effect of pressure which is imparted by a pressure roller. The intermediate transferring medium may be made of electric conductive material.

Abstract: A heat-sensitive transfer medium comprises a support and at least two heat-transferable ink layers including a first and a second ink layer. The first ink layer has relative adhesions with the second ink layer and the support which are reverse at a higher temperature from those at a lower temperature. When the heat-sensitive transfer medium is superposed with paper, a heat energy is applied, and the transfer medium is separated from the paper; the second ink layer is selectively transferred or both the first and second ink layers are transferred to the paper depending on the length of time from the heat application until the separation of the transfer medium, whereby two color images can be formed by a single transfer medium.

Abstract: A thermal transfer material suitable for two-color recording comprises a support and at least a first adhesive layer, a first ink layer, and a second ink layer disposed in this order on the support. The adhesion strength F.sub.1 between the support and the first ink layer and the adhesive strength F.sub.2 between the first and second ink layers satisfy the relations of F.sub.1 >F.sub.2 at a higher temperature and F.sub.1 <F.sub.2 at a lower temperature. The first ink layer comprises a binder having a glass transition temperature (Tg) of 0.degree. C. or below and 25-85 wt. % of a pigment. Two color recording is effected by superposing the thermal transfer material on plain paper, applying a pattern of heat and separating the thermal transfer material from the paper while changing the time from heating until the separation, i.e., temperatures at the time of separation. Sharp edge cutting of the heated portion is ensured by the definition of the composition of the first ink layer.

Abstract: An improved dry toner for developing latent images is disclosed which comprises essentially a resin and a magnetic powder. The resin includes, as the copolymerization components, at least one monomer selected from the group consisting of styrene and its derivatives and at least one monomer selected from the group consisting of maleic acid and its derivatives.

Abstract: Thermal transfer recording is carried out through the steps of: applying a heat or electric energy in a pattern to a peripheral surface of an ink roll having the peripheral surface composed of a heat-transferable ink, thereby to form a melted or softened pattern of the heat-transferable ink; causing the peripheral surface of the ink roll to contact a recording medium to transfer the melted or softened ink pattern onto the recording medium; and smoothing the peripheral surface of the ink roll.

Abstract: An electrophotographic photosensitive member has a photosensitive layer in which the surface hardness of the photosensitive layer is 10 g. or more which is a vertical load necessary for forming a scratch of 50 .mu.m wide when the vertical load is applied to a diamond or supphire cone pressing member, the conical angle being 90.degree. and the tip being a semispheric shape having a diameter of 0.01 mm and the cone pressing member is moved on the surface of the photosensitive layer at the speed of 50 mm/min.

Abstract: A pressure-fixable encapsulated toner each capsule of which comprises a core containing a pressure-fixable component and a shell entirely or partially covering the core, characterized in that the shell comprises a copolymer of 95-70% by weight of vinylidene chloride and 5-30% by weight of acrylonitrile. This encapsulated toner is excellent in the covering property of the shell, is easy to prepare, and exhibits good stable triboelectrical chargeability, developing ability, and pressure fixability to plain paper, during many repeated service operations.

Abstract: A developer comprises toner particles and flowability improver granules having a granule size of 0.1-20 times the average particle size of the toner particles. The developer has high durability, fixability and good developing characteristics.

Abstract: Excellent durability is obtained by use of a developer for electrophotography containing toner and microcapsule type additive.

Abstract: A pressure fixable capsule toner is composed of a pressure fixable core material covered with a coating material in which the main particle size of the capsule toner, a (microns), the main particle size of the core material, b (microns), and the hardness of the core material, y (dmm, by JIS-K2530) satisfy the formula:0.01 exp (a-b).ltoreq.y.ltoreq.

Abstract: A method for developing electrical latent images is disclosed in which electrically formed latent images are developed by using a mixture of at least two different toners having the same polarity. The two or more different kinds of toners in the mixture have a difference in triboelectric charge between them less that 10 .mu.c/g. Furthermore, developing is carried out by using a liquid developer containing a mixture of at least two different toners having the same polarity. Each of the toners in the mixture should have a Zeta-potential more than 50 mV in absolute value and the difference in Zeta-potential between the different kinds of toners should be less than 50 mV.

Abstract: A pressure fixable capsule toner comprises a core material containing a pressure fixable component and an outer shell layer covering the core material and containing a cyclized rubber.

Abstract: A pressure fixable capsule toner encapsulated with an insulating material is featured by a main particle size located within a range from 5 to 25.mu., by a particle size distribution that at least 70% in number of the toner particles are within a size range of .+-.3.mu. of the main particle size, and by a relationship 0.02.ltoreq.(a-b)/b.ltoreq.0.4 wherein a and b respectively stand for the main particle size of the capsule toner and core material in microns.

Abstract: Graphite fluoride is added to a developer for developing electrostatic latent images.

Abstract: The present invention relates to a process for transferring a previously formed image onto an image-forming member. The process of the invention comprises forming a positive image on a releasable image-forming layer from a negative image by the dye transfer method or the inversion method, followed by releasing and transferring only the said image-forming layer onto the above-mentioned image-forming member by means of, for example, heat, pressure or electron beam.

Abstract: .Iadd.Electrophotographic copying device including novel means for forming a high contrast electrostatic image on a photosensitive member, as well as means for developing said high contrast electrostatic image with toner particles, means for transferring the visualized electrostatic image to copying material and novel cleaning means for removing from the photosensitive member, residual toner particles after transfer of the image. .Iaddend.