Abstract: A maintenance work support device which computes replacement information of a part configuring a device and supports maintenance work of the device includes: a storage unit storing information; and a control unit controlling the maintenance work support device according to the stored information. The storage unit comprises: a unit storing identification information and a replacement state for improving part quality as quality information; a unit storing device identification information and a replacement state by a past part failure as replacement history information; and a unit storing a part replacement record associated with a device use state as replacement record information.

Abstract: The present invention relates to a toner, comprising a binder resin, a colorant and two kinds of infrared absorbing agents, and having a maximum absorbance of the toner in a wavelength range of 810 to 870 nm that is greater, preferably two or more times greater than the maximum absorbance of the toner in a wavelength range of 870 to 1,000 nm, and also relates to an image-forming method which uses a flash fixing system with a xenon lamp serving as its light source, and is characterized by using the above-mentioned toner.

Abstract: A non-contact heat fixing toner, comprising a binder resin, a colorant, an infrared absorbing agent, a first wax and a second wax, wherein a difference (X-Y) between the maximum peak temperature (X; ° C.) in the differential thermal curve in the first wax and Tg (Y; ° C.) of the binder resin is within the range from ?5 to +10° C.

Abstract: The present invention relates to a negatively chargeable toner, comprising: toner particles prepared by means of a wet granulation method; and external additives externally added to the toner particles, wherein the external additives comprises a first hydrophobic silica having a mean primary particle size of 5 nm to 18 nm, a second hydrophobic silica having a mean primary particle size of 18 nm to 50 nm, which is greater than that of the first hydrophobic silica, and a hydrophobic titanium oxide having a mean primary particle size of 10 nm to 40 nm, and a full color image-forming method using the negatively chargeable toner.

Abstract: A non-contact heat fixing toner, comprising a binder resin, a colorant, an infrared absorbing agent, a first wax and a second wax, wherein a difference (X−Y) between the maximum peak temperature (X; ° C.) in the differential thermal curve in the first wax and Tg (Y; ° C.) of the binder resin is within the range from −5 to +10° C.

Abstract: The present invention relates to a toner, comprising a binder resin, a colorant and two kinds of infrared absorbing agents, and

Abstract: The present invention relates to a full color image forming method for forming a full color image on a recording medium by using specific magenta toner, specific cyan toner, specific yellow toner and black toner, wherein a maximum adhering amount of the magenta toner, the cyan toner and the yellow toner on the recording medium is respectively 5.0 g/m2 or less.

Abstract: The present invention relates to a negatively chargeable toner, comprising:

Abstract: The present invention provide a toner comprising: a coloring agent; a binder resin comprising a first binder resin and a second binder resin, the first binder resin being composed of a linear polyester resin having a number-average molecular weight (Mn) of from 2,500 to 7,000, a weight-average molecular weight (Mw) of from 8,000 to 25,000, and a Mw/Mn ratio of 2 to 4, the second binder resin being composed of a non-linear polyester resin having a number-average molecular weight (Mn) of from 3,500 to 11,000, a weight-average molecular weight (Mw) of from 40,000 to 250,000, and a Mw/Mn ratio of 10 to 35, and a ratio of the first binder resin to the second binder resin (the first binder resin:the second binder resin) being 15:85 to 85:15 by weight, a first releasing agent having a softening point of 55 to 110° C., and a second releasing agent having a softening point of 110 to 160° C.

Abstract: The present invention provide a toner comprising: a coloring agent; a binder resin comprising a first binder resin and a second binder resin, the first binder resin being composed of a linear polyester resin having a number-average molecular weight (Mn) of from 2,800 to 7,000, a weight-average molecular weight (Mw) of from 8,900 to 21,000, and a Mw/Mn ratio of 2 to 4, the second binder resin being composed of a non-linear polyester resin having a number-average molecular weight (Mn) of from 3,500 to 8,000, a weight-average molecular weight (Mw) of from 40,000 to 120,000, and a Mw/Mn ratio of 10 to 20, and a ratio of the first binder resin to the second binder resin (the first binder resin:the second binder resin) being 60:40 to 95:5 by weight.

Abstract: The present invention relates to a toner that contains at least a binder resin and a colorant, characterized in that the toner has a temperature range of 90 to 110° C. at 2×103 (Pa) of a storage elastic modulus (G′) under 0.1 (Hz) of a frequency.

Abstract: The present invention relates to a full color image forming method for forming a full color image on a recording medium by using specific magenta toner, specific cyan toner, specific yellow toner and black toner, wherein a maximum adhering amount of the magenta toner, the cyan toner and the yellow toner on the recording medium is respectively 5.0 g/m2 or less.

Abstract: The present invention relates to an additive agent for toner, comprising: inorganic particles; a first fatty-acid metal salt existing on the surface of the inorganic particles, the first fatty acid metal salt having a metal that is an alkali metal; and a second fatty-acid metal salt existing on the surface of the inorganic particles, the second fatty-acid metal salt having a metal other than an alkali metal, a ratio of the first fatty-acid metal salt to the second fatty-acid metal salt being set in a range of 0.01 to 0.5% by weight; and a toner containing toner particles and the additive agent.

Abstract: The present invention provides a toner for developing an electrostatic latent image which suppresses an adhesion and wearability on a surface of a photosensitive member and exhibits an excellent rising property of an electrification. The toner comprises (i) toner particles containing a binder resin and a colorant, (ii) a first external additive consisting of first inorganic particles whose number-average particle size is 5-40 nm, (iii) a second external additive consisting of second inorganic particles whose number-average particle size, which is larger than that of the first external additive, is 20-160 nm, (iv) a third external additive consisting of third inorganic particles whose number-average particle size, which is larger than that of the second external additive, is 80-1200 nm, and (v) a fourth external additive consisting of a metal salt of fatty acid whose volume-average particle size is 1.5-12 &mgr;m, said four external additives being externally added to the toner particles.

Abstract: The toner composition comprises an aliphatic higher alcohol (1) or a higher fatty acid (2): H&Parenopenst;CH2&Parenclosest;nOH (n: an integer)  (1) H&Parenopenst;CH2&Parenclosest;mCOOH (m: an integer)  (2) wherein number-average carbon atom numbers of the aliphatic higher alcohol or higher fatty acid ore 21-29, contents of the ingredients having carbon atom numbers of not more than 20 are not more than 2% by weight, and contents of the ingredients having carbon atom numbers of not less than 30 are not more than 2% by weight.

Abstract: The present invention relates to a toner comprising toner particles and an external additive comprising strontium titanate particles that have a number-average particle size of 80 to 800 nm and do not have a peak of strontium carbonate in qualitative analysis by X-ray diffraction.

Abstract: The present invention relates to toner comprising: toner particles containing a binder resin and a colorant; and organic fine particles admixed with the toner particles, the organic fine particles having a volume average particle size of 0.1 to 20 &mgr;m and containing alkyl carboxylic acid having a number average molecular weight of 300 to 1000. The organic fine particles may be specified by an average number of carbon atoms of 20 to 70.

Abstract: The present invention relates to a toner comprising:toner particles containing a binder resin and a colorant; andan external addition agent that is admixed with the toner particles,the external addition agent comprising titanium oxide particles which are produced through a vapor-phase oxidizing method and has a number-average particle size of 0.1 to 0.7 .mu.m.

Abstract: The present invention provides an electrostatic latent developing toner which comprises:toner particles containing a colorant and a binder resin, the toner particles satisfying the following relation:1.45-0.05 D.sub.50 .ltoreq.D.sub.25 /D.sub.75 .ltoreq.1.75-0.05D.sub.50(1)(in which D.sub.25, D.sub.50 and D.sub.75 denote toner particle sizes such that when the toner particles are integrated from the larger particle side, the volume percentages of toner particles of respective particle sizes are 25%, 50%, and 75% based on the total volume of the toner particles), particle size D.sub.50 being within the range of from 3 to 7 .mu.m; orthe toner particles having a volume-mean particle size of 3 to 7 .mu.m and a shape factor SF1 of 100 to 130 as expressed by the following relation (2):SF1={100 .pi..times.(max length).sup.2 }/{4.times.

Abstract: A developer contains a set of color toners and black toner for use in a full color image forming apparatus. Each of the color toners contains a color colorant and a first binder resin, and the black toner contains a black colorant and a second binder resin. The difference between softening point and flow starting temperature of said first binder resin is less than the difference between softening point and flow starting temperature of said second binder resin.