An imaging system includes a housing that defines a housing space, a fuser disposed inside the housing space to fix a toner image onto a print medium, a collecting device including an ionizer and a particle filter, and a controller. The fuser is associated with operation history information. The ionizer of the collecting device includes a first electrode and a second electrode. The ionizer generates a discharge between the first electrode and the second electrode so as to charge floating particles that are discharged from the fuser. The particle filter of the collecting device collects the charged floating particles. The controller controls a current to flow between the first electrode and the second electrode due to the discharging, based on the operation history information of the fuser.

A control unit of an image forming apparatus calculates an actual linear pressure of a cleaning blade by taking into account, with respect to an initial linear pressure of the cleaning blade measured in advance, a linear pressure reduction based on cumulative rotation time of an image carrier, a linear pressure reduction based on cumulative non-rotation time of the image carrier, and a linear pressure reduction based on an external temperature detected by a temperature detection unit, and the control unit outputs information for urging replacement of the cleaning blade to an output unit when a linear pressure difference between the actual linear pressure of the cleaning blade and a lower-limit linear pressure of the cleaning blade calculated in advance from an abrasion amount of the cleaning blade with respect to the cumulative number of rotations of the image carrier reaches a predetermined threshold value.

A control unit of an image forming apparatus calculates an actual linear pressure of a cleaning blade by taking into account, with respect to an initial linear pressure of the cleaning blade measured in advance, a linear pressure reduction based on cumulative rotation time of an image carrier, a linear pressure reduction based on cumulative non-rotation time of the image carrier, and a linear pressure reduction based on an external temperature detected by a temperature detection unit, and the control unit outputs information for urging replacement of the cleaning blade to an output unit when a linear pressure difference between the actual linear pressure of the cleaning blade and a lower-limit linear pressure of the cleaning blade calculated in advance from an abrasion amount of the cleaning blade with respect to the cumulative number of rotations of the image carrier reaches a predetermined threshold value.

An image forming apparatus includes a controller configured to identify a selected sheet size setting as defined by a dimension in the width direction and a dimension in the conveyance direction, set a cooling threshold at a first threshold if the selected sheet size setting is a first size having a dimension in the width direction larger than a predetermined dimension, and a dimension in the conveyance direction larger than the dimension in the width direction, and set the cooling threshold at a second threshold lower than the first threshold if the selected sheet size setting is a second size having a dimension in the width direction that is the same as the dimension in the width direction of the first size, and a dimension in the conveyance direction smaller than the dimension in the width direction.

A developing device includes a developing container having a first stirring chamber and a second stirring chamber that are arranged in juxtaposition with each other and a developer carrier that carries toner in the second stirring chamber. The developing container includes a duct, an air suction port, a first filter, and a second filter. The duct is arranged adjacently to the second stirring chamber and allows air in the second stirring chamber to flow out to an exterior. The air suction port is open along a longitudinal direction of the second stirring chamber and allows communication between inside the second stirring chamber and inside the duct. The first filter covers the air suction port. The second filter is arranged on a downstream side of the first filter in an air circulation direction in the duct and covers an air circulation path in the duct.

An imaging system includes a housing to define a housing space, a collection device to collect fine particles in the housing space, a detection device to detect a collection performance of the collection device, and a cleaning device to clean the collection device.

In one example in accordance with the present disclosure, a print system is described. The print system includes a drive roller Print System and a heated transfer belt forming a nip with the drive roller. The heated transfer belt transmits thermal energy to print media passing through the nip. The print system also includes multiple independently-controlled heat sources disposed within the heated transfer belt to transfer thermal energy to the heated transfer belt.

An image forming apparatus configured to form an image on a recording material includes a detection unit configured to detect a temperature of a first member, and an estimation unit configured to estimate a temperature of a second member, which is different from the first member. The estimation unit is configured to estimate, based on the temperature of the second member estimated by the estimation unit at a first timing, which is a timing before the image forming apparatus is powered off, the temperature of the first member detected by the detection unit at a second timing, which is a timing after the image forming apparatus is powered on, and information representing an operation history of the image forming apparatus until when the image forming apparatus is powered off, the temperature of the second member at the second timing.

An image forming apparatus configured to form an image on a recording material includes a detection unit configured to detect a temperature of a first member, and an estimation unit configured to estimate a temperature of a second member, which is different from the first member. The estimation unit is configured to estimate, based on the temperature of the second member estimated by the estimation unit at a first timing, which is a timing before the image forming apparatus is powered off, the temperature of the first member detected by the detection unit at a second timing, which is a timing after the image forming apparatus is powered on, and information representing an operation history of the image forming apparatus until when the image forming apparatus is powered off, the temperature of the second member at the second timing.

A printing drum for a liquid electrophotographic printing system which comprises a photosensitive surface and a heating device mounted to the printing drum. The heating device heats the photosensitive surface of the printing drum to a predetermined temperature.