Abstract: The present invention relates to a non-magnetic mono-component toner composition and a preparation method thereof. Disclosed is a non-magnetic mono-component toner composition prepared by coating a spherical organic fine particle having a weight-average molecular weight (Mw) of 250,000-1,600,000 and an average particle size of 50-500 nm, a hydrophobic silica, and a metal oxide fine particle on a toner mother particle. The non-magnetic mono-component toner composition of the present invention ensures smooth toner supply because of good fluidity, reduces PCR contamination and deterioration of image quality, enables uniform toner layer formation on the development roller, prevents blocking at the blade of the development roller, and solves the low temperature double image problemin the non-imaging region at a low temperature. Therefore, it can be useful for an image printing apparatus adopting the non-magnetic mono-component development system in which the developing roller contacts the photoreceptor.

Abstract: The present invention relates to a non-magnetic mono-component toner comprising a toner mother particle, and a coating layer formed on the mother particle where the coating layer comprises fatty acid metal salt having average particle size of 0.05 to 3.0 ?m, a first organic particle having average particle size of 0.3 to 2.0 ?m, a second organic particle having average particle size of 0.05 to 0.25 ?m, and silica having average particle size of 0.006 to 0.04 ?m. The color toner has narrow charge distribution, high chargeability, a low environmental dependence, and excellent image quality, transfer efficiency, and long-term stability by significantly reducing the contamination of the charging elements.

Abstract: The present invention relates to a non-magnetic monocomponent color toner and a preparing method thereof. In the non-magnetic monocomponent color toner including a toner mother particle, silica and titanium dioxide, the toner mother particle comprises a specific shaped particle size distribution of the charge control agents, and thus, providing non-magnetic monocomponent color toner with a narrow charge distribution and good chargeability. Accordingly, the color toner does not cause contamination in the non-imaging region. Also, because it has superior image density and printing efficiency and significantly improved charge maintenance, it has good long-term stability.

Abstract: The present invention relates to a polymerized toner with high chargeability and good charge-stability, and a method of preparing the polymerized toner. In particular, the present invention relates to a polymerized toner containing pigments, pigment stabilizers, charge control agents and binder resin monomers, and a method to prepare the polymerized toner by suspension polymerization of pigments, pigment stabilizers, charge control agents and binder resin monomers, wherein the pigment stabilizer is a styrene-butadiene-styrene block copolymer having the weight-average molecular weight of 2,000 to 200,000, and the charge control agent is a copolymer with sulfonate group having the weight-average molecular weight of 2,000 to 200,000.

Abstract: The present invention relates to a magnetic mono-component toner composition, and more particularly to a mono-component toner composition that comprises magnetic toner particle comprising a binder resin, a magnetic component, and a charge control agent; a hydrophobic treated silica having a specific surface area of 20 to 80 m2/g; a hydrophobic treated silica having a specific surface area of 130 to 230 m2/g; and a metal oxide fine powder. A magnetic mono-component toner composition of the present invention has such good flowability that it provides smooth toner supply even when the developing roller surface has been worn due to long time use, and it has such excellent uniform chargeability that it prevents image deterioration (“wave” patterns of toner may form on developing roller, that is, magnetic sleeve) by forming an uniform toner layer on the developing roller.

Abstract: The present invention relates to a non-magnetic monocomponent color toner composition and a method for preparing the same, and more particularly to a non-magnetic monocomponent color toner composition having a narrow charge distribution, good charging characteristics, good environmental independence, superior image characteristics, high transfer efficiency and long-term stability caused by significantly improved charge maintenance capability, and a method for preparing the same. The non-magnetic monocomponent color toner composition of the present invention is prepared by coating organic particles having an average particle size of 0.3 to 2.0 ?m, organic particles having an average particle size of 0.05 to 0.25 ?m, and silica on toner mother particles.

Abstract: The present invention relates to a color toner for a nonmagnetic mono-component printing system that improves the printing characteristics, and a preparation method thereof. More specifically, the present invention provides a color toner including a first coating layer and a second coating layer formed on a toner mother particle, wherein the first coating layer contains coated organic powders where two kinds of organic powders are coated with each other, and the second coating layer contains coated inorganic powders where silica and titanium dioxide are coated with each other. The color toner of the present invention has a narrow charge distribution, good image density, high transfer efficiency, excellent long-term stability, and reduced PCR contamination, thereby being good for use in high speed color printers, etc., employing a direct type or a tandem type of transfer system.

Abstract: The present invention relates to a magnetic toner composition, and more particularly to a magnetic toner composition having an improved chargeability and excellent uniform chargeability, and that is capable of reducing a difference in electrostatic charge between a toner remaining in a cartridge or in a developing unit and that of a newly supplied toner. A magnetic toner composition of the present invention comprises magnetic toner particulate comprising a binder resin and a magnetic substance, a conductive fine powder having a specific surface area of 30 to 300 m2/g, a hydrophobic silica having a specific surface area of 100 to 240 m2/g, and an inorganic fine powder having an average diameter of 0.1 to 4.O ?m.

Abstract: The present invention relates to a non-magnetic mono-component toner comprising a toner mother particle, and a coating layer formed on the mother particle where the coating layer comprises fatty acid metal salt having average particle size of 0.05 to 3.0 ?m, a first organic particle having average particle size of 0.3 to 2.0 ?m, a second organic particle having average particle size of 0.05 to 0.25 ?m, and silica having average particle size of 0.006 to 0.04 ?m. The color toner has narrow charge distribution, high chargeability, a low environmental dependence, and excellent image quality, transfer efficiency, and long-term stability by significantly reducing the contamination of the charging elements.

Abstract: The present invention relates to a non-magnetic mono-component toner composition, which comprises a) a non-magnetic toner particle comprising a binding resin comprising a binder resin and a copolymer of a cyclic olefin and an acyclic olefin polymerized in the presence of a metallocene catalyst and a cocatalyst, a colorant, and a charge-control agent; b) fine powder of an organic compound containing fluorine that is added to the surface of the non-magnetic toner particle; and c) hydrophobic silica having a specific surface area of 100 to 240 m2/g. The toner composition of the present invention has superior transfer efficiency and charging properties and thus can obtain a stable image, does not show deteriorated image density, and does not generate background contamination of non-image areas and off-set due to deterioration of fixing properties, even if copying or printing is conducted therewith for a long time use.

Abstract: The present invention relates to a polymerized toner prepared by suspension polymerization. Provided is a method for preparing a toner comprising the steps of (1) preparing a toner by suspension polymerization using a water-based dispersant that adjusts size of emulsion particles, which are formed as byproduct, to 0.05-2 ?m; and (2) removing the dispersant from the toner surface, refining the toner, so that concentration of the emulsion particles becomes 0.01-2 wt % of the toner, and filtering and drying the toner in vacuum. Also provided is a toner prepared by suspension polymerization using a water-based dispersant, concentration of emulsion particles being 0.01-2% and diameter of the emulsion particles being 0.05-2 ?m. The present invention provides a good toner having fusing property and developing property by effectively controlling the concentration of emulsion particles formed during suspension polymerization as byproduct.

Abstract: The present invention relates to a non-magnetic mono-component toner composition and a preparation method thereof. Disclosed is a non-magnetic mono-component toner composition prepared by coating a spherical organic fine particle having a weight-average molecular weight (Mw) of 250,000-1,600,000 and an average particle size of 50-500 nm, a hydrophobic silica, and a metal oxide fine particle on a toner mother particle. The non-magnetic mono-component toner composition of the present invention ensures smooth toner supply because of good fluidity, reduces PCR contamination and deterioration of image quality, enables uniform toner layer formation on the development roller, prevents blocking at the blade of the development roller, and solves the low temperature double image problemin the non-imaging region at a low temperature. Therefore, it can be useful for an image printing apparatus adopting the non-magnetic mono-component development system in which the developing roller contacts the photoreceptor.

Abstract: The present invention relates to a magnetic mono-component toner composition with positive charge comprising i) a magnetic toner particle containing a charge control agent with positive charge; ii) a hydrophobic silica with negative charge; iii) a fluorinated organic fine powder; and iv) a metal oxide fine powder containing 20 to 80 wt % of tin oxide. The toner has an advantageous in the extended life of the drum, reduction of the background contamination, and improvement of long-term reliability, and thus can be used effectively for image forming apparatus.

Abstract: The present invention relates to a non-magnetic monocomponent color toner and a preparing method thereof. In the non-magnetic monocomponent color toner including a toner mother particle, silica and titanium dioxide, the toner mother particle comprises a specific shaped particle size distribution of the charge control agents, and thus, providing non-magnetic monocomponent color toner with a narrow charge distribution and good chargeability. Accordingly, the color toner does not cause contamination in the non-imaging region. Also, because it has superior image density and printing efficiency and significantly improved charge maintenance, it has good long-term stability.

Abstract: The present invention relates to a non-magnetic monocomponent color toner composition and a method for preparing the same, and more particularly to a non-magnetic monocomponent color toner composition having a narrow charge distribution, good charging characteristics, good environmental independence, superior image characteristics, high transfer efficiency and long-term stability caused by significantly improved charge maintenance capability, and a method for preparing the same. The non-magnetic mono-component color toner composition of the present invention is prepared by coating organic particles having an average particle size of 0.3 to 2.0 ?m organic particles having an average particle size of 0.05 to 0.25 ?m, and silica on toner mother particles.

Abstract: The present invention relates to a magnetic mono-component toner composition, and more particularly to a mono-component toner composition that comprises magnetic toner particle comprising a binder resin, a magnetic component, and a charge control agent; a hydrophobic treated silica having a specific surface area of 20 to 80 m2/g; a hydrophobic treated silica having a specific surface area of 130 to 230 m2/g; and a metal oxide fine powder. A magnetic mono-component toner composition of the present invention has such good flowability that it provides smooth toner supply even when the developing roller surface has been worn due to long time use, and it has such excellent uniform chargeability that it prevents image deterioration (“wave” patterns of toner may form on developing roller, that is, magnetic sleeve) by forming an uniform toner layer on the developing roller.

Abstract: The present invention relates to a magnetic toner composition, and more particularly to a magnetic toner composition having an improved chargeability and excellent uniform chargeability, and that is capable of reducing a difference in electrostatic charge between a toner remaining in a cartridge or in a developing unit and that of a newly supplied toner. A magnetic toner composition of the present invention comprises magnetic toner particulate comprising a binder resin and a magnetic substance, a conductive fine powder having a specific surface area of 30 to 300 m2/g, a hydrophobic silica having a specific surface area of 100 to 240 m2/g, and an inorganic fine powder having an average diameter of 0.1 to 4.O&mgr;m.

Abstract: An animal trap includes a housing having a bottom wall, side walls, a top wall and a front opening in the side walls, opposing slots in the side walls adjacent the opening, and opposing channels in the side walls immediately behind the slots; a door slidably mounted in the slots for movement between raised and lowered positions to unblock and block the opening; a platform pivotally positioned on the bottom wall; levers pivotally mounted to the side walls adjacent the opening, each having a front end catch for engaging a lower end of the door to hold the door in the raised position, and a rear end; and lifters slidably guided by the channels for vertical movement between the rear end of the lever and one end of the platform, to cause pivoting of the levers and closing of the door upon pivoting of the platform.