Abstract: An image forming apparatus includes a main body, a development cartridge, a toner cartridge, and a controller. The development cartridge includes a development roller, a development chamber, and a development memory. The toner cartridge includes a case in which toner is stored, a toner supply unit configured to supply toner from the case into the development chamber, and a toner memory. The controller stores, in the development memory, information regarding a cumulative received toner amount and a cumulative toner consumption amount. The controller subtracts the cumulative toner consumption amount from the cumulative received toner amount to find a difference, and causes the toner supply unit to supply a first predetermined amount of toner into the development chamber when the difference is equal to or smaller than a first threshold value. The controller stores, in the toner memory, information regarding the cumulative supplied toner amount.

Abstract: An image forming apparatus is configured to execute image forming processing of forming an image on a sheet. The apparatus includes a photosensitive drum, a fixing device including a heater and a roller, a main motor configured to generate a driving force, a driving mechanism having a connected state in which the driving force is transmittable to both the roller and the photosensitive drum, and a disconnected state in which the driving force is transmittable to the roller but is not transmitted to the photosensitive drum, a temperature sensor configured to detect a temperature of the fixing device, and a controller. In a case where the image forming processing is started, the controller sets the driving mechanism into the disconnected state, rotates the main motor at a preheating speed, and executes preheating processing in which the fixing device is heated by the heater.

Abstract: An image forming apparatus includes a main body including a display, a drum cartridge configured to be mounted to the main bod, a toner cartridge configured to be mounted to the drum cartridge, and a controller. The drum cartridge includes a photosensitive drum, a developing chamber configured to accommodate toner, and a drum memory. The toner cartridge includes a housing configured to accommodate the toner. The controller is configured to store, in the drum memory, a cumulative toner receiving amount which is a cumulative amount of the toner supplied from the toner cartridge and received in the developing chamber, a cumulative toner consumption amount which is a cumulative amount of the consumed toner, and a cumulative drum printing sheet number which is a number of sheets on which an image is formed.

Abstract: An image forming apparatus including a motor, a photosensitive drum, a developing roller, a main memory, and a controller. The controller is configured to perform storing a first rotation number and a second rotation number in the main memory. The first rotation number is the rotation number of the photosensitive drum rotated in a first state where the photosensitive drum rotates and the developing roller is stopped. The second rotation number is the rotation number of the photosensitive drum rotated in a second state where the photosensitive drum rotates and the developing roller rotates. The controller is further configured to perform, in a case where the photosensitive drum rotates, determining a total deterioration quantity of the photosensitive drum which is a cumulative deterioration quantity of the photosensitive drum based on the first rotation number and the second rotation number.

Abstract: An image forming apparatus is configured to execute image forming processing of forming an image on a sheet. The apparatus includes a photosensitive drum, a fixing device including a heater and a roller, a main motor configured to generate a driving force, a driving mechanism having a connected state in which the driving force is transmittable to both the roller and the photosensitive drum, and a disconnected state in which the driving force is transmittable to the roller but is not transmitted to the photosensitive drum, a temperature sensor configured to detect a temperature of the fixing device, and a controller. In a case where the image forming processing is started, the controller sets the driving mechanism into the disconnected state, rotates the main motor at a preheating speed, and executes preheating processing in which the fixing device is heated by the heater.

Abstract: An image forming apparatus is configured to perform image forming processing. The image forming apparatus includes a photosensitive drum, a main motor configured to generate a driving force, a drum clutch having a transmission state in which the driving force is transmitted to the photosensitive drum and a disconnected state in which the driving force is not transmitted to the photosensitive drum, a sheet sensor configured to detect a rear edge of a sheet upstream of the photosensitive drum in a sheet conveying direction, and a controller. In a case where a start command for subsequent image forming processing is not received after the sheet sensor detects a rear edge of a last sheet in image forming processing performed based on received print data, the controller executes drum clutch disconnection processing, and then executes main motor rotation stop processing.

Abstract: An image forming apparatus includes a main body including a display, a drum cartridge configured to be mounted to the main bod, a toner cartridge configured to be mounted to the drum cartridge, and a controller. The drum cartridge includes a photosensitive drum, a developing chamber configured to accommodate toner, and a drum memory. The toner cartridge includes a housing configured to accommodate the toner. The controller is configured to store, in the drum memory, a cumulative toner receiving amount which is a cumulative amount of the toner supplied from the toner cartridge and received in the developing chamber, a cumulative toner consumption amount which is a cumulative amount of the consumed toner, and a cumulative drum printing sheet number which is a number of sheets on which an image is formed.

Abstract: An image-forming apparatus includes: a photosensitive drum, a motor, and a drum gear train configured to transmit a driving force from the motor to the photosensitive drum. The drum gear train includes a first gear, a second gear and a first clutch. The first gear is rotatable about a first axis upon receipt of the driving force. The second gear is rotatable about the first axis and configured to receive the driving force from the first gear and to transmit the driving force to the photosensitive drum. The first clutch is switchable between a first transmission state where the driving force is transmitted from the first gear to the second gear and a first transmission cutoff state where the transmission of the driving force from the first gear to the second gear is cut off.

Abstract: An image forming apparatus includes a main body, a development cartridge, a toner cartridge, and a controller. The development cartridge includes a development roller, a development chamber, and a development memory. The toner cartridge includes a case in which toner is stored, a toner supply unit configured to supply toner from the case into the development chamber, and a toner memory. The controller stores, in the development memory, information regarding a cumulative received toner amount and a cumulative toner consumption amount. The controller subtracts the cumulative toner consumption amount from the cumulative received toner amount to find a difference, and causes the toner supply unit to supply a first predetermined amount of toner into the development chamber when the difference is equal to or smaller than a first threshold value. The controller stores, in the toner memory, information regarding the cumulative supplied toner amount.

Abstract: An image forming apparatus including a motor, a photosensitive drum, a developing roller, a main memory, and a controller. The controller is configured to perform storing a first rotation number and a second rotation number in the main memory. The first rotation number is the rotation number of the photosensitive drum rotated in a first state where the photosensitive drum rotates and the developing roller is stopped. The second rotation number is the rotation number of the photosensitive drum rotated in a second state where the photosensitive drum rotates and the developing roller rotates. The controller is further configured to perform, in a case where the photosensitive drum rotates, determining a total deterioration quantity of the photosensitive drum which is a cumulative deterioration quantity of the photosensitive drum based on the first rotation number and the second rotation number.

Abstract: An image-forming apparatus includes: a photosensitive drum, a motor, and a drum gear train configured to transmit a driving force from the motor to the photosensitive drum. The drum gear train includes a first gear, a second gear and a first clutch. The first gear is rotatable about a first axis upon receipt of the driving force. The second gear is rotatable about the first axis and configured to receive the driving force from the first gear and to transmit the driving force to the photosensitive drum. The first clutch is switchable between a first transmission state where the driving force is transmitted from the first gear to the second gear and a first transmission cutoff state where the transmission of the driving force from the first gear to the second gear is cut off.

Abstract: A drainage tube insertion tool for use in an endoscope, comprising: a drainage tube configured to slidably fit on an outer surface of an insertion portion of the endoscope, and a pusher tube configured to slidably fit on the outer surface of the insertion portion of the endoscope and which pushes the drainage tube, wherein a notch is formed in a side wall portion of the pusher tube along a longitudinal axis direction, and the pusher tube is fitted on the outer surface of the insertion portion upon making a side surface of the insertion portion extend through the notch, and the drainage tube is inserted into a predetermined lumen of a body cavity by pushing the drainage tube out of a distal end of the insertion portion with the pusher tube.

Abstract: A drainage tube insertion tool for use in an endoscope, comprising: a drainage tube configured to slidably fit on an outer surface of an insertion portion of the endoscope, and a pusher tube configured to slidably fit on the outer surface of the insertion portion of the endoscope and which pushes the drainage tube, wherein a notch is formed in a side wall portion of the pusher tube along a longitudinal axis direction, and the pusher tube is fitted on the outer surface of the insertion portion upon making a side surface of the insertion portion extend through the notch, and the drainage tube is inserted into a predetermined lumen of a body cavity by pushing the drainage tube out of a distal end of the insertion portion with the pusher tube.

Abstract: When washing the electronic endoscope, a cleaning liquid that has flowed into a space between a shell of an electric connector and an external cylinder of a watertight cap does not reach a connector pin that resides inside the shell since an O-ring seals an internal cylinder of the watertight cap and the shell. The cleaning liquid is discharged to the outside of the watertight cap through discharge holes, which are formed between the external cylinder and the internal cylinder.

Abstract: An insertion instrument for an endoscope is disclosed which comprises, a hard end portion formed at least an illuminating means having an illumination lens provided in a lens barrel and light guide, and an observing means at least an objective optical system disposed within an objective lens barrel, the hard end portion being divided into a holding member and a cover member detachably fitted to said holding member, concave shaped recesses provided therebetween for inserting at least the illuminating lens barrel and the objective lens barrel from outer periphery of the holding member inwardly in the radial direction, wherein said recesses have a arc shaped portions to substantially coincide with outer diameters of the illuminating lens barrel and said objective lens barrel, and detachable positioning means provided for positioning the illuminating lens barrel and the objective lens barrel in the recesses in the axial direction.

Abstract: When washing the electronic endoscope, a cleaning liquid that has flowed into a space between a shell of an electric connector and an external cylinder of a watertight cap does not reach a connector pin that resides inside the shell since an O-ring seals an internal cylinder of the watertight cap and the shell. The cleaning liquid is discharged to the outside of the watertight cap through discharge holes, which are formed between the external cylinder and the internal cylinder.