Abstract: An antenna apparatus includes: a parabolic reflector; a dielectric support pedestal; a sub-reflector connected to an upper part of the dielectric support pedestal; and a waveguide connected to a lower part of the dielectric support pedestal, wherein the parabolic reflector has a curved surface in which a ratio of a focal length to a diameter is greater than a preset value, and at least one corrugation configured to suppress a cross polarization is formed in a region of the dielectric support pedestal.

Abstract: An image forming apparatus is provided. The image forming apparatus includes a paper-feed unit, a developing unit to form an image in a printing medium, an insertion unit including first and second rollers configured to insert the printing medium conveyed from the paper-feed unit into the developing unit, and a guide unit rotatably disposed about a rotation shaft of the first roller and configured to guide the printing medium moving from the paper-feed unit to the insertion unit and selectively press the first roller to the second roller.

Abstract: An image forming apparatus is provided. The image forming apparatus includes a paper-feed unit, a developing unit to form an image in a printing medium, an insertion unit including first and second rollers configured to insert the printing medium conveyed from the paper-feed unit into the developing unit, and a guide unit rotatably disposed about a rotation shaft of the first roller and configured to guide the printing medium moving from the paper-feed unit to the insertion unit and selectively press the first roller to the second roller.

Abstract: The present invention provides a micro needle roller assembly comprising a roller head including an external cylindrical member having a plurality of micro needles mounted on a surface thereof and an internal member placed in the external member and supported to the external member by supporting pieces; and a handling member coupled to the internal member for rotating the internal member of the roller head; the plurality of micro needles, the external cylindrical member and the internal member being made of a polymer resin.

Abstract: An image forming apparatus includes a developing device, a plurality of feeding and delivering paths through which a printing medium is delivered to the developing device, a feeding roller unit which forms a developing and delivering path in which the plurality of feeding and delivering paths are joined and delivers the printing medium to the developing device, and a guide unit which guides the printing medium passing through the plurality of feeding and delivering paths to the feeding roller unit and is rotatably provided to expose the plurality of feeding and delivering paths to the outside. In the above configuration, the printing medium jam problems inside the image forming apparatus are easily cleared.

Abstract: An image forming apparatus includes a developing device, a plurality of feeding and delivering paths through which a printing medium is delivered to the developing device, a feeding roller unit which forms a developing and delivering path in which the plurality of feeding and delivering paths are joined and delivers the printing medium to the developing device, and a guide unit which guides the printing medium passing through the plurality of feeding and delivering paths to the feeding roller unit and is rotatably provided to expose the plurality of feeding and delivering paths to the outside. In the above configuration, the printing medium jam problems inside the image forming apparatus are easily cleared.

Abstract: A bag having a convertible carrying system that may convert from a single strap capable of being used to carry the bag to more than one strap portion capable of being used to carry the bag. In embodiments, the strap may be connected to the bag at its ends to form a single strap capable of being used to carry the bag and the strap may be folded at a mid-section and removably attached to the bag substantially at or near at the mid-section to form more than one strap portion capable of being used to carry the bag. In an embodiment, the bag may have a secondary strap attached to the strap substantially at or near the mid-section which is capable of helping to maintain the folding in the strap. In this manner, the bag may be carried by a user as a shoulder bag or as a backpack.

Abstract: A storage device and a method for making the storage device are described. In one implementation, the storage device comprises first and second walls having interior and exterior portions. The second wall opposes and is connected to the first wall so that the interior portions of the first and second walls define an interior of the storage device and the exterior portions of the first and second walls define an exterior of the storage device. An access opening is located between the first and second walls, and the access opening is sized to receive an electronic device. A plurality of voids is located in the first wall and the voids are configured to permit air passage between the interior and exterior of the storage device. A porous material that permits airflow through the voids may be connected to the first wall. Other implementations are described.

Abstract: A bag having a convertible carrying system that may convert from a single strap capable of being used to carry the bag to more than one strap portion capable of being used to carry the bag. In embodiments, the strap may be connected to the bag at its ends to form a single strap capable of being used to carry the bag and the strap may be folded at a mid-section and removably attached to the bag substantially at or near at the mid-section to form more than one strap portion capable of being used to carry the bag. In an embodiment, the bag may have a secondary strap attached to the strap substantially at or near the mid-section which is capable of helping to maintain the folding in the strap. In this manner, the bag may be carried by a user as a shoulder bag or as a backpack.

Abstract: The present invention provides a micro needle roller assembly comprising a roller head including an external cylindrical member having a plurality of micro needles mounted on a surface thereof and an internal member placed in the external member and supported to the external member by supporting piece; and a handling member coupled to the internal member for rotating the internal member of the roller head; the micro needles, the external cylindrical member and the internal member being made of polymer resin.

Abstract: A storage device and a method for making the storage device are described. In one implementation, the storage device comprises first and second walls having interior and exterior portions. The second wall opposes and is connected to the first wall so that the interior portions of the first and second walls define an interior of the storage device and the exterior portions of the first and second walls define an exterior of the storage device. An access opening is located between the first and second walls, and the access opening is sized to receive an electronic device. A plurality of voids is located in the first wall and the voids are configured to permit air passage between the interior and exterior of the storage device. A porous material that permits airflow through the voids may be connected to the first wall. Other implementations are described.