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Jeong Yeon
Jeong Yeon Kim, Seoul KR
| Patent application number | Description | Published |
|---|---|---|
| 20110061608 | DEVICE FOR SUPPLYING WARM WATER AND METHOD THEREOF - Provided is a device for supplying warm water and a method thereof. The device for supplying warm water includes a first heater configured to have a first set capacity and heating received water, a second heater configured to have a second set capacity greater than the first set capacity and heating received water, and a control part calculating heater driving cycles of the first heater and the second heater according to a set water temperature, and driving the first heater and the second heater according to the heater driving cycles. The control part calculates the heater driving cycle of the first heater by using a phase control method, and calculates the heater driving cycle of the second heater by using a zero-crossing control method. | 03-17-2011 |
Jeong Yeon Kim, Daejeon KR
| Patent application number | Description | Published |
|---|---|---|
| 20090104108 | Method of Preparing Boehmite and Gamma-Alumina With High Surface Area - The present invention relates to a method for preparing boehmite and γ-alumina with high surface area, and more particularly, to a method comprising hydrolysis of aluminum alkoxides to produce boehmite and calcination to produce γ-alumina, wherein an alcohol is used as a reaction solvent and a small amount of water and a particular organic carboxylic acid are added so that not only the reaction solvent is easily recovered and energy required for drying is significantly reduced but also it provides boehmite having nano-sized particles, high surface area, and high purity. Further, the prepared γ-alumina may be suitable for high value added industrial applications such as manufacture of adsorbents, catalysts, catalyst supports and chromatography materials. | 04-23-2009 |
Jeong Yeon Park, Hwaseong-Si KR
| Patent application number | Description | Published |
|---|---|---|
| 20100061766 | IMAGE FORMING APPARATUS - An image forming apparatus can include a first developing portion having first to fourth developing devices containing yellow, magenta, cyan, and black developers, respectively, each of the first to fourth developing devices being disposed apart from adjacent developing devices of the first to fourth developing devices at a regular interval, a second developing portion to include at least one auxiliary developing device to supplement colors of the first developing portion, and an image carrier to convey images of the first and second developing portions, wherein an interval between the first and second developing portions is a multiple of the regular interval between the first to fourth developing devices. | 03-11-2010 |
| 20100133736 | BOOKBINDING UNIT AND IMAGE FORMING APPARATUS HAVING THE SAME - Disclosed are a bookbinding unit and an image forming apparatus having the same. The bookbinding unit includes a bookbinding unit main body, a pair of stack trays disposed in the bookbinding unit main body so as to support print media on the upper surfaces of the stack trays and a folding knife movable in the space between the pair of the stack trays to fold the print media on the stack trays and to move the folded print media into the space between the pair of the stack trays. The pair of the stack trays is rotatable in conformity with the movement of the print media into the space between the stack trays to provide a surface contact guiding of the folded print media. | 06-03-2010 |