Abstract:
A fusing apparatus includes a heating unit to generate heat to fuse an image onto a printing medium, a pressurizing roller that faces and contacts the heating unit having an endless fusing film that is rotated while facing and contacting the pressurizing roller and presses the printing medium toward the heating unit, a nip forming member including a main body formed inside the fusing film to surround a heat source and contacts a portion of the fusing film to the pressurizing roller to form a nip, a plurality of opening forming portions connected to the main body and form an opening portion such that heat generated from the heat source directly arrives at the fusing film via the opening portion, and a plurality of adhering portions connected to the opening forming portions, are separated from each other, having the opening portion therebetween, and contact the fusing film, and a supporting member to support the nip forming member.
Abstract:
A fixing device includes a pressing roller, a fixing belt to receive a rotation force transferred from the pressing roller and to rotate thereby, a nip forming member which is mounted inside the fixing belt, the nip forming member including a heat transmission unit formed thereon, and a heat source, which is mounted inside the nip forming member, to simultaneously apply heat to the nip forming member and to the fixing belt through the heat transmission unit.
Abstract:
A heating roller assembly for an image forming apparatus. The heating roller assembly includes a heating roller pipe having a heating layer around which a coil is wound. The heating layer has a coil winding structure such that first portions ‘A’ formed adjacent to bearings for rotatably supporting the heat roller pipe have a lower thermal temperature than that of second portions ‘B’ formed adjacent to the first portions A. The first portions A serve as a heat absorber to minimize the fusing heat loss at the beginning of a fusing process, and even if the fusing process continues for a long time, the heat absorber can prevent the opposite ends of the heating roller, where the bearings are disposed, from overheating. Accordingly, a more accurate pickup operation is achieved and a stable quality of image can be guaranteed.
Abstract:
A fusing apparatus and an image forming apparatus using the fusing apparatus are provided. The fusing apparatus includes a fusing roller having a heat generating unit and a pressing unit having a fusing belt and at least two pressing members supporting the fusing belt to rotate and contact the fusing roller.
Abstract:
A fusing roller which is heated by a heat source, includes: a core member; a first primer which is formed on a circumference of the core member; an elastic layer which is formed on a circumference of the first primer, and adhered on the circumference of the core member by the first primer; and a basic coating layer which is disposed between the core member and the first primer, and chemically combined with the first primer.
Abstract:
An image forming apparatus to shorten a warm-up time required to fuse a visible image to a printing medium is provided. The image forming apparatus includes an indirect heating member to indirectly transfer radiant heat to the visible image formed on the printing medium passing through the fusing nip, and a direct heating member to directly transfer resistance heat to the visible image formed on the printing medium passing through the fusing nip. Accordingly, since the radiant heat generated from the indirect heating member heats the direct heating member, a heating rate of the direct heating member increases, and the warm-up time required to reach a predetermined fusing temperature to fuse the visible image is shortened.
Abstract:
A fixing device includes a fixing roller, a fixing belt which is made to rotate by a rotation force received from the fixing roller, a nip forming unit to form a nip zone at a contact area between the fixing roller and the fixing belt, and a first heating unit, which is separated from the nip zone, to apply heat to the fixing belt. The nip zone and the heating unit are separated, so that the heating unit can be prevented from being broken as a result of the pressurization and thermal deformation.
Abstract:
An image forming apparatus to shorten a warm-up time required to fuse a visible image to a printing medium is provided. The image forming apparatus includes an indirect heating member to indirectly transfer radiant heat to the visible image formed on the printing medium passing through the fusing nip, and a direct heating member to directly transfer resistance heat to the visible image formed on the printing medium passing through the fusing nip. Accordingly, since the radiant heat generated from the indirect heating member heats the direct heating member, a heating rate of the direct heating member increases, and the warm-up time required to reach a predetermined fusing temperature to fuse the visible image is shortened.
Abstract:
A fusing roller which is heated by a heat source, includes: a core member; a first primer which is formed on a circumference of the core member; an elastic layer which is formed on a circumference of the first primer, and adhered on the circumference of the core member by the first primer; and a basic coating layer which is disposed between the core member and the first primer, and chemically combined with the first primer.
Abstract:
A fuser roller and a fusing unit including the fuser roller are to be used in an image-forming apparatus. The fuser roller includes a tubular fusing portion, an inner tube, and a heating portion. The inner tube is inserted into the fusing portion. The heating portion is installed to enclose an outer surface of the inner tube and press against an inner surface of the fusing portion, and to radiate heat. The fusing portion is surface treated to have a roughness factor of Ra 3-5μm.