Toru Matsumoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: A sampling device of the suction effusion fluid that is good in sampling operation efficiency. This device includes a cell with a vacuum suction port and a skin suction port, a slide valve formed in the cell, and fluid reservoirs formed in the valve. The slide valve is movable in a plane approximately parallel to the skin surface. The slide valve opens or closes a communication path communicating the skin suction port with the vacuum suction port. Each of the fluid reservoirs is alternately communicated with the skin suction port and the vacuum suction port through the communication path by sliding movement of the slide valve. Each of the fluid reservoirs stores an effusion fluid acquired from the skin surface by vacuum suction through the skin suction port. When the slide valve is located at a position where one of the fluid reservoirs is communicated with the skin suction port and the vacuum suction port, at least one of the remaining fluid reservoirs is exposed to the outside of the cell.
Abstract: Disclosed is an apparatus for forming a color image on a photoreceptor, in which along the rotation direction of the photoreceptor there are provided an imagewise exposure process to form a latent image, a development process including a plurality of developing devices to form a color toner image, each of the plural developing devices having a toner hopper, and a transfer process to transfer the formed color toner image onto a copy paper. The apparatus comprises a housing for including at least the photoreceptor, the plural developing devices and the plural toner hopper as one unit, and a support guide for supporting the housing to be movable in the axial direction of the photoreceptor so that the unit is attached to and detached from the apparatus.
Abstract: A mixture of a colorant, and a binder compound having an aliphatic hydrocarbon long chain and having a relatively low melt viscosity, is kneaded in a molten state in the presence of solid media such as balls or beads to form a uniform mixture in which the colorant particles or aggregates have been disintegrated to a size of 5 .mu. or below. Solid particles which may be used as a toner are formed from the uniform mixture and may be encapsulated, as desired, to provide a capsule toner.
Abstract: An encapsulated toner for development of electrical latent images comprises a core particle containing a colorant and a soft solid material, inorganic fine particles attached to the vicinity of the surface of the core particle, and a shell coating the core particle and the inorganic fine particles. The inorganic fine particles function to, e.g., reinforce the encapsulated toner with a thin shell and may be attached to the core particles through dry-mixing. The core particles with the attached inorganic particles may be coated with a shell resin through phase separation.
Abstract: A developing method, which comprises arranging a latent image-bearing member which bears a latent image on the surface and a toner-carrying member which carries an insulating non-magnetic toner at the developing section with a certain gap provided therebetween, coating the toner-carrying member with the insulating non-magnetic toner, conveying the resultant coated layer to the developing section while regulating the thickness thinner than said gap and developing the latent image on the latent image-bearing member under the application of an alternate electric field on the toner. Since the toner has a form of a microcapsule comprising a soft core material and a hard shell material and also contains a colorant in addition to the core material, adequate discharging can be effected during triboelectric charging to give an image with a constant density through stably charged state.
Abstract: A pressure-fixable toner comprising a combination of a compound A having a hydrocarbon chain and a compound B having an amino group in addition to a hydrocarbon chain is excellent in dispersibility of colorant, pressure fixing characteristic and developing characteristic. Further, an encapsulated pressure-fixable toner comprising a core of the pressure-fixable toner particles and a shell encapsulating the core is also excellent in these properties.
Abstract: A core material comprising a binder mixture of a long chain organic compound and an ester of a higher alcohol and a higher carboxylic acid is encapsulated with a thin shell material to give an encapsulated toner. The encapsulated toner has a uniform structure and a narrow particle size distribution and is excellent in developing and fixation characteristics, when used in electrophotography, etc.
Abstract: A process for producing a toner, comprising the steps of suspending a molten mixture of starting materials of a binder containing a compound having a hydrocarbon chain and a colorant in an aqueous dispersing medium in the presence of a hardly water-soluble fine powdery inorganic dispersant, cooling the dispersed particles, and recovering the cooled particles.
Abstract: A capsule toner, comprising core particles of a core material exhibiting a cloud point within the range of from 30 to 90 and a penetration within the range of from 2 to 15, and a shell material coating the core particles. The capsule toner is preferably formed by dispersing the core particles in solution of the shell material in a good solvent for the shell material, and then adding a poor solvent for the shell material to cause the deposition of the shell material on the core particles.
Abstract: A pressure-fixable capsule toner for electrophotography having characteristics such as good combination of fixability and durability and also a stable charge controlling characteristic is provided. The core materials typically are of polyethylene or paraffin wax. The shell material is a vinyl polymer characterized by low molecular weight distribution represented by a ratio of weight-average molecular weight/number average molecular weight of not larger than 3.5. The vinyl polymer is preferably a copolymer of styrene or a derivative thereof and a tertiary amino-group containing vinyl monomer.
Abstract: As a developer for developing electrostatic images in electrophotography, electrostatic recording, electrostatic printing, etc., there is employed a developer containing a finely divided silicic acid which is a finely divided silicic acid synthesized by a wet process and has a pH value of 6 to 11 when suspended at a concentration of 4% by weight in distilled water and the developer can be positively charged strongly and uniformly to visualize the negative electrostatic images, giving a high quality image.
Abstract: An apparatus for developing electrostatic latent images includes an applicator for applying a developer, containing a high concentration of developer particles, uniformly over both the image and non-image areas of a latent image bearing surface, and a developing device including a liquid reservoir and an elastic roller including a core shaft, a porous elastic inner layer on the core shaft, and a flexible and permeable sleeve-like net covering the inner layer. Liquid from the reservoir is applied by the roller to the image bearing surface to remove developer particles not attracted thereto by coulomb force to thereby form the developed image. Marginal effect in the developed image is eliminated by making at least one of the inner layer or net electrically conductive.
Abstract: An image forming process including a step of developing an electrostatic image by supplying a liquid developer to a surface holding said image thereon, which comprises conducting said development when a liquid developer supply member capable, upon elastic deformation thereof, of squeezing out and absorbing said liquid developer is brought into pressure contact with said image-holding surface, and, when said development is not performed, separating said supply member from said surface and maintaining said supply member in a state wetted with said liquid developer. And also an image forming apparatus which is adapted for use in such process.
Abstract: An elastic roller for use in an image forming apparatus comprises a rigid shaft member, an internal layer provided around said shaft member with a determined thickness and consisting of a porous elastic member containing therein pores for holding liquid, and an external layer covering said internal layer and consisting of a flexible liquid-permeating member provided with a number of through holes, said roller being provided with a means for applying a tension to said external layer in the axial direction of said roller.
Abstract: A method for developing electrostatic latent images comprises a first step of supplying uniformly a developer containing developing particles onto an electrostatic latent image carrying surface and a second step of supplying liquid onto the latent image carrying surface to remove any excess developer from the surface while leaving on the surface only such developing particles that are able to be retained as a result of the relative attraction between the developing particles and the electrostatic latent image so as to visualize the latent image. Apparatus for carrying out the method comprises a developing particle applying means and a liquid supplying means. The developing particle applying means is disposed to effect a uniform adhesion of developing particles onto an electrostatic latent image carrying surface.