Patent application number | Description | Published |
20080292228 | Shaft Member for Fluid Lubrication Bearing Apparatuses and a Method for Producing the Same - A shaft member for hydrodynamic bearing apparatuses which can restore the pressure balance in a thrust bearing gap formed on both axial sides of the flange portion in an early stage is provided at low costs. | 11-27-2008 |
20090208153 | HOUSING FOR FLUID LUBRICATION BEARING APPARATUSES, A HOUSING FOR HYDRODYNAMIC BEARING APPARATUSES, AND A METHOD FOR PRODUCING THE SAME - A fluid lubrication bearing apparatus which can stably produce high bearing performance is provided at low costs. Moreover, a method for producing a housing for hydrodynamic bearing apparatuses which can improve the accuracy of form of the housing of this type at low costs is provided. | 08-20-2009 |
20090279817 | FLUID DYNAMIC BEARING APPARATUS - A fluid dynamic bearing apparatus having an increased a value of tolerance for a moment load is provided. | 11-12-2009 |
20100266225 | SHAFT MEMBER FOR FLUID LUBRICATION BEARING APPARATUSES AND A METHOD FOR PRODUCING THE SAME - A shaft member for hydrodynamic bearing apparatuses which can restore the pressure balance in a thrust bearing gap formed on both axial sides of the flange portion in an early stage is provided at low costs. | 10-21-2010 |
20110192210 | SHAFT MEMBER FOR FLUID LUBRICATION BEARING APPARATUSES AND A METHOD FOR PRODUCING THE SAME - A low-cost shaft member for hydrodynamic bearing apparatuses restores the pressure balance in a thrust bearing gap formed on both axial sides of the flange portion in an early stage. A shaft material integrally having a shaft portion and a flange portion with a through-hole between both end faces of the flange portion is formed in a common forging step. As a result, the through-hole is formed to open to an inner diameter side of the bearing gaps avoiding the thrust bearing gaps formed on both end faces of the flange portion of the shaft member as a finished product. | 08-11-2011 |
20110296896 | HOUSING FOR FLUID LUBRICATION BEARING APPARATUSES, A HOUSING FOR HYDRODYNAMIC BEARING APPARATUSES, AND A METHOD FOR PRODUCING THE SAME - A fluid lubrication bearing apparatus which can stably produce high bearing performance is provided at low costs. Moreover, a method for producing a housing for hydrodynamic bearing apparatuses which can improve the accuracy of form of the housing of this type at low costs is provided. | 12-08-2011 |
20120073139 | Dynamic bearing device - A seal member is fixed to a predetermined position on an outer peripheral surface of a shaft portion. During rotation of a shaft member, a lower end surface of the seal member is opposed to an upper end surface of a bearing sleeve through an intermediation of a thrust bearing gap to form a second thrust bearing gap. An outer peripheral surface of the seal member defines between itself and an inner peripheral surface of an upper end portion of a housing a seal space having a predetermined volume. | 03-29-2012 |
20120186983 | FLUID DYNAMIC BEARING DEVICE - It is an object of the present invention to provide a bearing member having a highly accurate dynamic pressure generating portion stably at low cost. Dynamic pressure grooves ( | 07-26-2012 |
20130283619 | METHOD FOR PRODUCING A HOUSING FOR A FLUID BEARING APPARATUS - A method for producing a housing for a hydrodynamic bearing apparatus includes forming a housing | 10-31-2013 |
20130336604 | FLUID DYNAMIC BEARING DEVICE - An inner peripheral surface and a lower end surface of a bearing sleeve made of a sintered metal are each formed into a smooth cylindrical surface or a flat surface that does not have a dynamic pressure generating portion. Thus, a step of forming the dynamic pressure generating portion can be omitted from a manufacturing step of the bearing sleeve, and cost of dies can be markedly reduced. Further, the inner peripheral surface of the bearing sleeve is formed into the smooth cylindrical surface, and hence a radial dynamic pressure generating portion is formed on an outer peripheral surface of a shaft member. However, the outer peripheral surface of the shaft portion is accessible to tools, and hence the radial dynamic pressure generating portion can be formed easily with high accuracy. As a result, accuracy of a radial bearing gap is enhanced so that a bearing rigidity is enhanced. | 12-19-2013 |
20140050427 | FLUID DYNAMIC BEARING DEVICE - A fluid dynamic bearing device ( | 02-20-2014 |
Patent application number | Description | Published |
20080309983 | METHOD, APPARATUS AND PROGRAM FOR CREATING A THRESHOLD VALUE MATRIX - In a first process, initial dot pattern of a predetermined dot rate “a” is created in a first process, and a gradation value corresponding to the dot rate “a” is arranged as a threshold value in the position of the pixel of the threshold value matrix corresponding to the initial dot pattern. Then in a second process, the initial dot pattern or the dot pattern having occurred prior to the second computation is used as the dot pattern of dot rate “b”, and new dots including the dots of the dot pattern of dot rate “b” is generated or any of the dots is removed from the dot pattern of the dot rate “b” by the error diffusion method. Thus, the dot pattern of the next dot rate “b′” with its dot rate having been increased or decreased in the aforementioned procedure is generated. | 12-18-2008 |
20090167805 | IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS - There is described an image forming apparatus, which can conduct the countermeasure for eliminating an ink clogging defect with accuracy lower than a recording element arrangement resolution. The apparatus includes a defect position detecting section to detect a defect position at which no recording material is outputted; a defect position specifying section to specify a defect recording element, which resides at the defect position, and a kind of recording material to be outputted by the defect recording element; a mixture ratio determining section to determine a mixture ratio of plural recording materials, so as to make the mixture ratio of a specific recording material to be outputted by plural recording elements residing in a peripheral area of the defect position and including the defect recording element, decrease to a value lower than a normal mixture ratio, while using the normal mixture ratio for other recording elements residing in other areas. | 07-02-2009 |
20110109680 | IMAGE RECORDING METHOD AND IMAGE RECORDING DEVICE - An image recording device comprising a line head including a plurality of recording element arrays arranged in one direction such that the recording elements have overlapping regions at the mutually adjoining end portions, characterized by comprising a halftone processor for subjecting multilevel image data to a halftone process in accordance with a first half tone processing rule to form the pattern of the dots to be recorded, as a recording pattern, an allocation processor for allocating which of the recording element arrays adjoining in the overlapping regions is used to record according to the recording pattern, by using a second half tone processing rule to suppress the low-frequency component of a space frequency, and a driver for driving the recording elements so that the dot data allocated to the individual recording element arrays may be recorded by the recording elements of the individual recording element arrays contained in the line head. | 05-12-2011 |
20130063786 | THRESHOLD MATRIX GENERATING METHOD, THRESHOLD MATRIX GENERATING DEVICE, THRESHOLD MATRIX, QUANTIZATION DEVICE, AND IMAGE FORMATTING DEVICE - A threshold matrix generating method includes: generating q(x, y, g) in which the number of dots in an initial dot pattern is varied; calculating an error matrix (ERR(x, y, g)) of q(x, y, g); calculating AVE(a, b) representing the uniformity of the number of dots in discrete blocks into which the dot pattern has been divided; determining two pixels, of which the dot positions are to be swapped, on the basis of ERR (x, y, g) and AVE(a, b); swapping the dot positions; calculating the evaluation value (MSE(n)) of q(x, y, g) after the positional swapping; and repeating the positional switch of the dots repeating the generation of q(x, y, g) and the positional swapping of the dots with q(x, y, g) functioning as the initial dot pattern until a q(x, y, g) satisfying MSN(n)03-14-2013 | |
20130285992 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD TO PERFORM SCREEN PROCESS ON IMAGE DATA OF A PLURALITY OF COLORS USING THRESHOLD MATRIX FOR EACH COLOR - An image processing apparatus to perform a screen process on color image data using threshold matrices includes an address calculation section, threshold processor and shift section. The address calculation section calculates an address in the threshold matrix. The threshold processor acquires a threshold by the address, and performs an n-valued process (n≧2) on a pixel value using the threshold. The shift section divides the image data into blocks in units of the threshold matrix, determines shift amounts for each block, and shifts the address. The threshold processor acquires a threshold by an address after the shift for at least one color, and performs the n-valued process using the threshold. The threshold matrix for a color for which the address is shifted has a screen ruling with a lower number of lines than the address is not shifted. | 10-31-2013 |