Patent application number | Description | Published |
20090087702 | FUEL CELL SYSTEM - A fuel cell system and method of controlling a fuel cell system capable of preventing deterioration in performance when the system reinitiates a normal operation from an idle stop state. For a predetermined time after reinitiating the supply of fuel gas and oxidant gas from the idle stop state, discharge of off-gas occurs and the cessation of fuel gas and oxidant gas supply is prohibited. | 04-02-2009 |
20100196771 | FUEL CELL SYSTEM AND METHOD FOR CONTROLLING FUEL CELL SYSTEM - A fuel cell system has a purge valve that adjusts the amount of nitrogen in a hydrogen circulation channel and a fuel electrode to be discharged through a discharge channel. A purge rate correcting unit variably sets a target control value of the nitrogen content in the hydrogen circulation channel and the fuel electrode by taking into account whether a driving mode is set in a normal power generation mode or an idle mode. An opening of the purge valve is controlled on the basis of the target control value. | 08-05-2010 |
20100203408 | FUEL CELL SYSTEM AND METHOD FOR OPERATING THE SAME - A fuel cell system which prevents the deterioration of the fuel cell stack when feeding of the oxidant gas is paused under a load to perform a fuel conservation operation. Controller shuts down oxidant gas compressor and cooling water circulating pump to execute fuel conservation operation at a low fuel cell system load. The controller gives a current draw instruction to electric power controller. In the fuel conservation operation, electric power controller draws a current larger than zero from fuel cell stack, and keeps the total charge drawn per unit time constant or substantially constant. | 08-12-2010 |
20100304260 | FUEL CELL SYSTEM AND METHOD OF CONTROLLING FUEL CELL SYSTEM - A fuel cell stack includes a heat exchange unit that performs heat exchange between a gas mixture containing source hydrogen and a circulating gas and cooling water used for controlling the temperature of the fuel cell stack. A system controller adjusts the temperature of the cooling water by controlling a temperature control unit on the basis of the temperature of source hydrogen flowing into a junction at which the source hydrogen and a circulating gas are mixed such that the temperature of a source/recirculated hydrogen mixture that is mixed at the junction and that is supplied to the fuel cell stack is kept within a managed temperature range. | 12-02-2010 |
20100323261 | FUEL CELL SYSTEM - A fuel cell system having a fuel cell, a coolant supply device for circulating a supply of the coolant through a coolant path for cooling the fuel cell, a fuel cell temperature detector for detecting a temperature of the fuel cell, a coolant temperature detector for detecting a temperature of the coolant in the coolant path, and a controller for controlling the amount of coolant circulated by the coolant supply device. The controller selects an operation mode of the fuel cell between a power generation mode and a power generation stop mode and calculates the difference between the detected coolant temperature and detected fuel cell temperature. While the operation mode is the power generation stop mode, the controller increases the amount of the coolant circulated as the difference between the detected coolant temperature and the detected fuel cell temperature increases. | 12-23-2010 |
Patent application number | Description | Published |
20090184992 | PRINTING METHOD, MEDIUM DETECTION METHOD, COMPUTER-READABLE STORAGE MEDIUM, AND PRINTING APPARATUS - A printing method includes the steps of: emitting light from a light-emitting section of an optical sensor toward a support member for supporting a medium, the support member being provided with an ink collecting section for collecting ink that has been ejected from an ink ejecting section and that has landed outside of the medium; changing a threshold value based on a signal that is output from the optical sensor in correspondence with an intensity of light reflected by the support member and received by a light-receiving section of the optical sensor; and detecting the medium by comparing the signal that is output from the optical sensor and the threshold value that has been changed. | 07-23-2009 |
20090189939 | LIQUID EJECTING APPARATUS AND PRINTING SYSTEM - The present invention relates to a liquid ejecting apparatus including: a movable head provided with a plurality of nozzles for ejecting a liquid; a carry unit for carrying a medium in a predetermined carrying direction; and a sensor for detecting an edge of the medium, the liquid ejecting apparatus controlling ejection of the liquid from the plurality of nozzles in accordance with a result of the detection of the sensor. In this liquid ejecting apparatus, the position, in the carrying direction, of the sensor is at the same position of or on an upstream side of a nozzle located most upstream in the carrying direction, of among the plurality of nozzles. In this way, it is possible to arrange the sensor for detecting the edge of the paper at the most suitable position, and to suppress waste of ink that is ejected from the nozzles. | 07-30-2009 |
20120081448 | Liquid Ejecting Apparatus And Printing System - A liquid ejecting apparatus includes a movable head with nozzles that eject a liquid; a transport unit that transports a medium in a transporting direction; and a sensor that detects an edge of the medium and that is movable with the head. Ejection of liquid from the nozzles is controlled based on the sensor detection result. The transport roller transports the medium in a slanted manner toward a surface of a platen, and after the medium's front edge contacts the platen, the medium bends on the platen with the front edge of the medium moving along the surface of the platen toward a paper discharge roller. Relative to the transporting direction, the sensor is positioned upstream of the most upstream nozzle and downstream of a position at which the front edge of the medium first comes into contact with the platen. | 04-05-2012 |
Patent application number | Description | Published |
20120087707 | PRINTER AND PRINTING METHOD - A printer includes a roll paper body driving mechanism that transports a medium by rotating a roll paper body on which the medium is wound, a first transport mechanism provided downstream of the roll paper body to transport the medium, a print head provided downstream of the first transport mechanism to carry out printing on the medium, a second transport mechanism provided between the roll paper body and the first transport mechanism to transport the medium, and a controller carries out control so that, in a range in which a velocity at which the first transport mechanism transports the media changes, the absolute value of a difference in an amount by which the medium is transported between transport mechanisms is larger between the roll paper body driving mechanism and the second transport mechanism than between the second transport mechanism and the first transport mechanism. | 04-12-2012 |
20120092671 | COLOR MEASUREMENT DEVICE AND COLOR MEASUREMENT METHOD - To press a medium using an appropriate pressing force and perform colorimetric measurement, a color measurement device for performing colorimetric measurement of a print pattern printed on a medium, the color measurement device comprising a pressing member for pressing the medium; a power source for outputting power for the pressing member to press the medium; a detecting part for detecting a pressing force on the medium; a color measurement section for performing colorimetric measurement of the print pattern; and a control part for controlling the power source so that the pressing force detected by the detecting part is equal to a predetermined pressing force, and for causing the color measurement section to perform colorimetric measurement of the print pattern printed on the medium pressed by the pressing member. | 04-19-2012 |
20120098913 | PRINTING DEVICE AND PRINTING METHOD - To prevent conveyance defects due to kicking, a printing device includes a conveyance roller for conveying a medium in a conveyance direction; a guide for supporting the medium on a top surface of the guide on an upstream side in the conveyance direction from the conveyance roller; and a head for ejecting ink and printing on the medium on a downstream side in the conveyance direction from the conveyance roller; wherein the top surface of the guide is positioned higher than a line tangent to the conveyance roller at a position of contact between the conveyance roller and the medium; and an end part of the guide on the downstream side in the conveyance direction has a smaller thickness in the direction in which the medium is supported than on the upstream side of the end part in the conveyance direction. | 04-26-2012 |
20120200628 | PRINTER AND PRINTING METHOD - A printer includes a roll driving mechanism for causing a roll to rotate and a medium to be conveyed, a roll driving section for driving the roll driving mechanism, a first conveying mechanism for conveying the medium, a first driving section for driving the first conveying mechanism, a second conveying mechanism for conveying the medium, and a second driving section for driving the second conveying mechanism, and a controller for performing a control in such a way that when there is a change in the rate at which the first conveying mechanism conveys the medium, the maximum amount of the difference between the amount of the medium conveyed by the roll driving mechanism and the amount of the medium conveyed by the second conveying mechanism exceeds the maximum amount of the difference. | 08-09-2012 |
20140043383 | PRINTING DEVICE - To reduce noise during paper conveyance while ensuring printing efficiency of an inkjet printer, a printing device is equipped with a control unit for moving a recording head back and forth in the scan direction according to the rotation of a carriage motor, a conveyance unit for extracting and feeding paper, conveying the paper in the sub scan direction to match the movement of the recording head to print the fed paper, and ejecting the printed paper according to the rotation of a conveyance motor, a paper reversal unit for coordinating with the rotation of the rotation means of the conveyance motor to reverse the front and back of the paper, and a printing control unit for controlling spraying of the ink from the recording head, as well as controlling the carriage motor and the conveyance motor. | 02-13-2014 |
20140354722 | PRINTING APPARATUS AND PRINTING METHOD - When printing is performed by discharging ink from a printing head onto a lenticular, a carriage motor is controlled such that a carriage is moved in a main scanning direction at a velocity which is slower than a movement velocity of the carriage at the time of performing a normal printing process with respect to a recording medium different from the lenticular as a recording paper and further separated from a home position, and the printing head is controlled such that an ink discharge having a color according to printing data is started with respect to an end portion of the lenticular, and thus the printing of one pass is started. Since the velocity is slower than the movement velocity of the carriage at the time of performing the normal printing process, it is possible to improve printing quality at the time of performing printing with respect to the lenticular. | 12-04-2014 |