Patent classifications
G03G15/0168
FIXING DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME
A fixing device includes a fixing rotator, a pressure rotator, and a cleaning device. The cleaning device cleans a surface of at least one of the fixing rotator and the pressure rotator. The cleaning device includes a cleaning web, a web holder, a winder, a cleaning pressure rotator, a pressure applier, and a temporary holder. The cleaning web slides over and cleans the at least one of the fixing rotator and the pressure rotator. The web holder holds and sends out the cleaning web. The winder winds the cleaning web. The cleaning pressure rotator presses the cleaning web against the at least one of the fixing rotator and the pressure rotator. The pressure applier presses against the cleaning web along a width direction of the cleaning web perpendicular to a direction in which the cleaning web is wound. The temporary holder temporarily holds the pressure applier.
IMAGE FORMING APPARATUS
An image forming apparatus includes a rotatable image bearing member, a developing member to develop an electrostatic latent image at a developing portion, a transfer member to transfer a developer image to a recording member at a transfer portion; and a brush provided with a plurality of base materials contacting the image bearing member at downstream of the transfer portion and upstream of the developing portion in a rotational direction of the image bearing member. The developer remaining on the surface of the image bearing member is collected in the developing portion. An average distance between base materials of the brush with respect to a rotational axis direction of the image bearing member is larger than an average particle diameter of the developer, and is equal to or less than a length corresponding to a special frequency visually recognizable by a user when the image formed by the image forming apparatus is observed by the user.
TONER, IMAGE FORMING APPARATUS, IMAGE FORMATION METHOD, AND PRINTED MATTER MANUFACTURING METHOD
A toner including a non-crystalline polyester resin, a crystalline polyester resin, a hydrocarbon wax, and an aromatic petroleum resin is provided. A mass ratio of the aromatic petroleum resin to the hydrocarbon wax is 1.0 or more. The non-crystalline polyester resin contains diol components, and the diol components include an alkylene oxide adduct of bisphenol A and ethylene glycol.
TONER, DEVELOPER, TONER HOUSING UNIT, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD
A toner includes a release agent. The release agent includes a hydrocarbon compound having 2 or more and 16 or less carbon atoms. A content of the hydrocarbon compound having 2 or more and 16 or less carbon atoms, in the release agent, is 1000 ppm or more in terms of toluene, as determined by gas chromatography mass spectrometry. The hydrocarbon compound having 2 or more and 16 or less carbon atoms includes a hydrocarbon compound having a retention time of 7 minutes or more and less than 8 minutes determined by the gas chromatography mass spectrometry.
TONER, DEVELOPER, TONER STORAGE UNIT, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD
Provided is a toner including toner particles. Each of the toner particles includes a toner base particle including a binder resin, resin particles covering the toner base particle, and zinc stearate particles serving as an external additive. In each of the toner particles, a coverage rate of the toner base particle with the resin particles is 30% or greater and 70% or less. The zinc stearate particles have a volume average particle diameter of 3 μm or greater and 20 μm or less.
Image forming apparatus and image forming method
An image forming apparatus is provided that includes: an image bearer; a charger; an irradiator; a developing device containing a toner; and a transfer device. The image bearer has a Martens hardness of from 185 to 250 N/m.sup.2. The toner satisfies a relation 0.13≤X/Dn≤0.16, where X [μm] represents an average value of an amount of deformation of the toner by micro-indentation at when a load reaches 3.00×10.sup.−4 N at a loading rate of 3.0×10.sup.−5 N/sec under an environment of 32 degrees C. and 40% RH, and Dn [μm] represents a number average particle diameter of the toner. The toner contains an external additive comprising silica particles and particles composed mainly of strontium titanate. The particles composed mainly of strontium titanate further contain a third element M selected from the group consisting of La, Mg, Ca, Sn, and Si.
IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
An image forming apparatus is provided that includes: an image bearer; a charger; an irradiator; a developing device containing a toner; and a transfer device. The image bearer has a Martens hardness of from 185 to 250 N/m.sup.2. The toner satisfies a relation 0.13X/Dn0.16, where X [m] represents an average value of an amount of deformation of the toner by micro-indentation at when a load reaches 3.0010.sup.4 N at a loading rate of 3.010.sup.5 N/sec under an environment of 32 degrees C. and 40% RH, and Dn [m] represents a number average particle diameter of the toner. The toner contains an external additive comprising silica particles and particles composed mainly of strontium titanate. The particles composed mainly of strontium titanate further contain a third element M selected from the group consisting of La, Mg, Ca, Sn, and Si.
Null segments in print jobs
According to examples, a method comprises receiving, at a processor, print job data relating to a print job to be performed by a print apparatus, the print job data defining order in which a plurality of colour separation images are to be transferred onto an imaging surface of the print apparatus. The method may comprise determining, based on the print job data, a number of null segments to be inserted into the print job and a location at which each null segment is to be inserted amongst the plurality of colour separation images. A print apparatus and a machine-readable machine are also disclosed.
NULL SEGMENTS IN PRINT JOBS
According to examples, a method comprises receiving, at a processor, print job data relating to a print job to be performed by a print apparatus, the print job data defining order in which a plurality of colour separation images are to be transferred onto an imaging surface of the print apparatus. The method may comprise determining, based on the print job data, a number of null segments to be inserted into the print job and a location at which each null segment is to be inserted amongst the plurality of colour separation images. A print apparatus and a machine-readable machine are also disclosed.
Electrostatic printing
A method of electrostatic printing may include forming a latent electrostatic image on a surface and transferring a first volume of a charged toner to the latent electrostatic image on the surface. The method may also include transferring a second volume of a charged toner to the surface, such that a toner image including the first volume of charged toner and the second volume of charged toner is formed on the surface, the second volume of charged toner being disposed on the first volume of charged toner. The method may also include transferring the image to a print substrate.