Canon Kabushiki Kaisha

Genya Anan

Kenichi Yamauchi

Masaki Yamada

Hidenori Satoh

Toru Ishii

Yuji Sakurai

Takashi Kase

Tatsuya Tada

Kenji Karashima

Satoru Yamanaka

Hirokazu Usami

Yuji Wakabayashi

Masahiro Kurachi

Yosuke Ata

A molding system to manufacture a three-dimensional object corresponding to a three-dimensional model. The molding apparatus includes a slice data generation unit to generate slice data from three-dimensional shape data of the three-dimensional model, and a lamination unit to laminate a layer of a molding material on the basis of the slice data. The slice data generation unit analyzes data, and, if a region in which a layer of a second molding material different from a first molding material is to be laminated on a layer of the first molding material and in which it is difficult to laminate the layers is extracted, modifies the data of a region of at least one of an ith layer and an (i+1)th layer to data in which a portion in which the first molding material is disposed and a portion in which the second molding material is disposed.

Molding system, data processing device for generating molding data, and method of manufacturing three-dimensional object

A shaping apparatus includes a storage section that stores in advance a first relationship between a temperature of a shaping material and a heating time at a time at which oxidation of the shaping material starts as the shaping material is heated; and a control section that estimates a timing at which the oxidation of a material layer starts, based on an acquisition result from a temperature acquisition section, a measurement result from a time measurement section, and the first relationship stored in the storage section when the material layer on a conveyance body is preheated by a preheating section, and reduces a front surface temperature of the material layer on the conveyance body before the oxidation of the material layer starts.

Shaping apparatus and shaping method

Provided is the following developer carrying member. The member has high charge-providing performance even under a high-temperature, high-humidity environment, and its surface layer hardly peels off its elastic layer even after long-term standing under the high-temperature, high-humidity environment. The developer carrying member comprises a mandrel, an elastic layer including a silicone rubber, and a surface layer covering a surface of the elastic layer, and the surface layer comprises a binder resin, and a copolymer having structural units of formula (1) and formula (2). R1 represents an alkyl group having 10-18 carbon atoms, R2 represents a methyl group or a hydrogen atom, R3 represents an alkylene group having 1-4 carbon atoms, Xrepresents a chloride ion, a bromide ion, or a p-toluenesulfonic acid ion, R4 represents a methyl group or a hydrogen atom, and R5 represents an alkylene group having 1-4 carbon atoms. 

Developing roller, electrophotographic process cartridge, and electrophotographic image forming apparatus

The present invention provides a developing member onto which a toner or the like is hard to fuse and with which toner conveying performance is unlikely to vary even through long-term usage. The developing member includes a substrate and a surface layer, the surface layer contains a polyurethane resin working as a binder resin and polyurethane resin particles dispersed in the binder resin, and the polyurethane resin working as the binder resin has, between two adjacent urethane bonds, a structure represented by a structural formula (1) and one or both of structures represented by structural formulas (2) and (3), and further has, between two adjacent urethane bonds, a structure represented by a structural formula (4).

Developing member, process cartridge and electrophotographic image forming apparatus

Provided is a developing member capable of exerting stable performance under various environments. The developing member comprises a mandrel, an elastic layer formed on a periphery of the mandrel, and a surface layer covering a peripheral surface of the elastic layer. The surface layer contains a polyurethane and zinc oxide particles dispersed in the polyurethane, and the polyurethane has, between two adjacent urethane bonds, one or both of structures selected from structures according to the following item (A) and the following item (B): (A) a structure represented by the following structural formula (1), and one or both of structures selected from a structure represented by the following structural formula (2) and a structure represented by the following structural formula (3); and (B) a structure represented by the following structural formula (4). 

Developing member, process cartridge, and electrophotographic apparatus

The present invention can provide a developing roller which can form a stable image in wide ranging environments from a low temperature/low humidity environment to a high temperature/high humidity environment. The developing roller includes a surface layer including a silicon oxide film containing at least a carbon atom chemically bonded to a silicon atom, an oxygen atom chemically bonded to a silicon atom, and a fluorine atom chemically bonded to a silicon atom and/or a carbon atom. The silicon oxide film has an abundance ratio of the fluorine atom to the silicon atom (F/Si), an abundance ratio of the oxygen atom forming a chemical bond to the silicon atom to the silicon atom (O/Si), and an abundance ratio of the carbon atom forming a chemical bond to the silicon atom to the silicon atom (C/Si) have values in particular ranges, respectively.

Developing roller, process cartridge, and electrophotographic image forming apparatus

A developing roller has a mandrel, an elastic layer and a cover layer as a surface layer. The cover layer includes a silicon oxide film containing a carbon atom chemically bonded to a silicon atom. In the silicon oxide film, the proportion of the total number of the elements of silicon, oxygen, carbon and hydrogen to the number of all detected elements, as detected with a high-frequency glow discharge light-emission surface analysis method, is 90% or more. The silicon oxide film has an abundance ratio of an oxygen atom chemically bonded to a silicon atom to silicon atoms, (O/Si), of 0.65 or more but 1.95 or less and an abundance ratio of a carbon atom chemically bonded to a silicon atom to silicon atoms, (C/Si), of 0.05 or more but 1.65 or less, and has a ratio of the maximum value to the minimum value of the (C/Si) in a thickness direction of the cover layer, of 1.50 to 33.00.

Developing roller, electrophotographic process cartridge and electrophotographic image-forming apparatus

A developing roller has a surface layer which can effectively inhibit the bleeding of a low-molecular-weight component from an elastic layer, and can efficiently impart a high electric charge to a negatively chargeable toner, and is excellent in toner-releasing properties. The developing roller has a mandrel, at least one layer of an elastic layer provided on the mandrel and a surface layer provided on the elastic layer, carries and conveys a toner, and develops an electrostatic latent image on an opposing photosensitive member with the toner. The surface layer comprises a silicon compound film containing Si, N, C and H having specific total amounts of the existing elements Si, N, C and H, and specific ratios N/Si, C/Si, and H/Si.

Developing roller, and electrophotographic process cartridge and electrophotographic image forming apparatus comprising the developing roller

A process for producing an electrophotographic roller member comprising a roller base member having a conductive mandrel and an elastic layer, and a film on the elastic layer. The process comprises the step of forming the film by plasma CVD. The step comprises the steps of: placing the roller base member in a chamber in such a way that the distance between the surface of the elastic layer and flat-plate electrodes is 20 mm or more to 100 mm or less; feeding a source gas into the chamber so as to have a pressure of from 13.3 Pa or more to 666.6 Pa or less; and applying to an electrode an electric power of from 0.3 W/cmor more to 2.0 W/cmor less while rotating the roller base member so that the peripheral speed of from 6 mm/s or more to 170 mm/s or less.

Process for producing electrophotographic roller member

A developing roller is provided which is soft enough to enable toners to be kept from deteriorating with time and cannot easily cause permanent set. The developing roller includes a mandrel, an elastic-material layer and a cover layer as a surface layer which covers the elastic-material layer. Asker-C hardness at the surface of the cover layer is from 40&#xb0; to 85&#xb0;. The cover layer has a thickness of from 15 nm to 5,000 nm. Martens hardness H1 (N/mm) at the surface of the developing roller, Martens hardness H2 (N/mm) of the elastic-material layer and the thickness d (mm) of the cover layer satisfy the relationship of the following expression (1):400&#x2266;(1&#x2212;2)/&#x2266;2,000&#x2003;&#x2003;(1).

Developing roller, developing assembly, process cartridge and electrophotographic image forming apparatus

A developing roller is provided having a surface that has excellent effect of suppressing exudation of low molecular weight substances from an elastic body, excellent toner release properties, and sufficient flexibility in which cracks do not easily occur even by repeated image formation. The developing roller carries and conveys toner to develop electrostatic latent images on a photosensitive drum with the toner and includes in this order a mandrel, an elastic layer, and a surface layer. The surface layer includes a silicon oxide film containing carbon atoms chemically bonded to silicon atoms. The silicon oxide film has an abundance ratio of oxygen atoms forming chemical bonds with silicon atoms to silicon atoms (O/Si) of 0.65 or more and 1.95 or less, and an abundance ratio of carbon atoms forming chemical bonds with silicon atoms to silicon atoms (C/Si) of 0.05 or more and 1.65 or less.

Growing community of inventors

Numazu, Japan

Genya Anan