Patent classifications
G03G9/0918
IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS
An image forming method is provided. The image forming method includes: forming an electrostatic latent image on an electrostatic latent image bearer; developing the electrostatic latent image on the electrostatic latent image bearer with a toner to form a toner image; transferring the toner image from the electrostatic latent image bearer onto a continuous resin film; fixing the toner image on the continuous resin film with a heat roller or a heat belt. The toner contains a maleic-acid-modified polyolefin having a polypropylene block in a main chain.
FLUORESCENT GREEN TONERS WITH ENHANCED BRIGHTNESS
Fluorescent green toners are provided. In embodiments, a fluorescent green toner comprises fluorescent agent-incorporated resin particles comprising a resin, a fluorescence brightener, and a yellow fluorescent agent having an absorption spectrum that overlaps with a fluorescence emission spectrum of the fluorescence brightener; and a cyan colorant; blue dye-incorporated resin particles comprising the resin and a blue dye; or both. The fluorescent green toner has a weight ratio of the yellow fluorescent agent to the cyan colorant and, if present, the blue dye, in a range of from 100:1 to 0.2:1, and the fluorescent green toner exhibits Førster Resonance Energy Transfer (FRET) under illumination with UV light. Methods of making and using the fluorescent green toners are also provided.
Toner container, image forming unit, and image forming apparatus
A toner container used in an image forming apparatus including an exposure unit with a light emitting diode light source includes a container body, and a cyan toner stored in the container body. A lightness L*, a hue a*, and a hue b* of the cyan toner in a powder state satisfy
26.94L*34.84,
5.13a*3.83, and
47.47b*36.78.
NONMAGNETIC TONER
A nonmagnetic toner comprises a nonmagnetic toner particle. The nonmagnetic toner particle comprises a crystalline resin A, an amorphous resin B, and a colorant. The crystalline resin A has a monomer unit (a). the amorphous resin B has a monomer unit (b). A content of the crystalline resin A in the nonmagnetic toner is 10.0 to 58.0 mass %. The sum of the contents of the crystalline resin A and the amorphous resin B in the nonmagnetic toner is 65.0 mass % or more. A content of the monomer unit (a) in the crystalline resin A is 50.0 to 100.0 mass %. Using SPA [(J/cm.sup.3).sup.0.5] for a SP value of the crystalline resin A and using SPB [(J/cm.sup.3).sup.0.5] for a SP value of the amorphous resin B, SPA and SPB satisfy 0.15SPBSPA2.00.
Image forming apparatus and toner set
An image forming apparatus is provided that includes: first and second electrostatic latent image bearers; first and second electrostatic latent image forming devices; first and second developing devices configured to develop first and second electrostatic latent images with a colored toner and a special-color toner to form a colored toner image and a special-color toner image, respectively; a primary transfer device configured to transfer the colored toner image and the special-color toner image onto an intermediate image bearer in an overlapping manner to form a composite toner image; a secondary transfer device configured to transfer the composite toner image onto a recording medium; and a fixing device configured to fix the composite toner image thereon. The special-color toner comprises plate-like and/or film-like pigments. An absolute difference in volume resistivity between the special-color toner and the colored toner is 0.30 log cm or less.
TONER CONTAINER, IMAGE FORMING UNIT, AND IMAGE FORMING APPARATUS
A toner container used in an image forming apparatus including an exposure unit with a light emitting diode light source. The toner container including a container body, and a cyan toner stored in the container body. The cyan toner includes a binder resin, at least one pigment, a charge control agent, and an external additive. The at least one pigment includes at least Pigment Blue. A lightness L*, a hue a*, and a hue b* of the cyan toner in a powder state satisfy: 30.04L*33.68, 1.75a*0.71, and 47.47b*45.08.
Electrophotographic photosensitive member, electrophotographic apparatus, and process cartridge
Provided is an electrophotographic photosensitive member that is improved in potential stability in long-term use under a high-temperature and high-humidity environment, and does not cause degradation in image quality, such as a low density. The electrophotographic photosensitive member includes: a support; an undercoat layer formed on the support; a charge-generating layer formed directly on the undercoat layer; and a charge-transporting layer formed on the charge-generating layer. The undercoat layer contains a polyamide resin, titanium oxide particles surface-treated with an organic silicon compound, and a compound represented by the following Formula (1), and has a content of the compound represented by the Formula (1) of 4 ppm or more and 80 ppm or less: ##STR00001##
in the Formula (1), R and R each independently represent a methyl group or an ethyl group.
IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE HAVING ELECTROSTATIC IMAGE DEVELOPING TONER WITH SPECIFIED VISCOSITY
An image forming apparatus includes an image carrier; a charging unit that charges a surface of the image carrier; an electrostatic image forming unit that forms an electrostatic image on the charged surface of the image carrier; a developing unit that includes a container and a supply member and develops the electrostatic image formed on the surface of the image carrier to form a toner image, the container containing an electrostatic image developer that contains an electrostatic image developing toner and a carrier, the supply member having in a circumferential surface thereof plural grooves extending in a direction intersecting a direction of rotation of the supply member, the electrostatic image being developed with the electrostatic image developer; a transfer unit that transfers the toner image formed on the surface of the image carrier to a recording medium; and a fixing unit that fixes the toner image transferred to the recording medium. The electrostatic image developing toner satisfies the following inequalities: (ln (T1)ln (T2))/(T1T2)0.14, (ln (T2)ln (T3))/(T2T3)0.15, and (ln (T1)ln (T2))/(T1T2)<(ln (T2)ln (T3))/(T2T3), wherein (T1) represents a viscosity of the electrostatic image developing toner at 60 C., (T2) represents a viscosity of the electrostatic image developing toner at 90 C., and (T3) represents a viscosity of the electrostatic image developing toner at 130 C.
TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT, ELECTROSTATIC IMAGE DEVELOPER, AND TONER CARTRIDGE
A toner for electrostatic image development includes: a binder resin; and a coloring agent. When an image with a toner mass per unit area of 4.0 g/m.sup.2 is formed using the toner, the image has a color that satisfies the following conditions (A), (B), and (C): (A) L* is from 37 to 50 inclusive; (B) is from 12 to 8 inclusive; and (C) b* is from 49 to 40 inclusive.
Toner for developing electrostatic images
A toner for developing electrostatic images includes at least a binder resin and a colorant containing a copper phthalocyanine compound, wherein in X-ray diffraction using a CuK ray, the toner has peaks at a Bragg angle of 2=7.00.1 and at a Bragg angle of 2=9.10.2 and additionally has a peak between the two peaks.