摘要:
In an image forming apparatus of a rotary type, when a pause is made during continuous image formation, the time taken to restart image formation after the pause is shortened so as to reduce stress on the user. In the image forming apparatus, it is determined beforehand whether the next image formation mode is a color mode or a mono mode, and a developing device to be first used in the next image formation mode is moved to a developing standby position.
摘要:
An image forming apparatus includes a rotary for changing an attitude of a developing device to a first attitude in which developer in a developer accommodating chamber is feedable to a developer feeding member and to a second attitude in which the developer having been located above a nip between the developer feeding member and a developing roller drops from the nip. In the image attitude of the developing device, an electrostatic latent image is developed. In the second attitude of the developing device, detection of a remaining amount of the developer is carried out.
摘要:
In a rotary-type image forming apparatus, rotation of a rotary is temporarily stopped at a position where a coupling member and a drive transmission member are engageable with each other, and a developing roller is set in a rotating state. Subsequently, the rotary is rotated so as to bring the developing roller into contact with a surface of a photosensitive drum.
摘要:
In a rotary-type image forming apparatus, rotation of a rotary is temporarily stopped at a position where a coupling member and a drive transmission member are engageable with each other, and a developing roller is set in a rotating state. Subsequently, the rotary is rotated so as to bring the developing roller into contact with a surface of a photosensitive drum.
摘要:
An image forming apparatus includes a rotary for changing an attitude of a developing device to a first attitude in which developer in a developer accommodating chamber is feedable to a developer feeding member and to a second attitude in which the developer having been located above a nip between the developer feeding member and a developing roller drops from the nip. In the image attitude of the developing device, an electrostatic latent image is developed. In the second attitude of the developing device, detection of a remaining amount of the developer is carried out.
摘要:
An image forming apparatus includes a rotatable image bearing member; a plurality of rotatable developer carrying members; a plurality of developing devices in each of which a respective one of the developer carrying members is provided; and a developing device supporting member rotatable in a direction of codirectional peripheral movement with the image bearing member where the supporting member and the image bearing member are opposed to each other and integrally supporting the plurality of said developing devices. The peripheral speed of the developing device supporting member divided by a peripheral speed of the image bearing member at the time when each of the developer carrying members departs from the surface of the image bearing member and is still rubbing the surface of the image bearing member with the developer is larger than 0 and smaller than 1.
摘要:
An image forming apparatus includes a developing device, a detection mode execution unit, and a notice signal generating unit. The developing device supplies a toner bearing member with toner in a container by rotating a toner supply member in a contact manner with the toner bearing member. The detection mode execution unit executes a detection mode in which a predetermined period for changing a toner amount in the foam layer by rotating the toner supply member is provided, a capacitance C1 between the first and second electrode members is detected before the predetermined period, and a capacitance C2 between the first and second electrode members is detected after the predetermined period. The notice signal generating unit generates a low toner amount notice signal in response to an absolute value |C1−C2| of a difference between the capacitances C1 and C2 being smaller than a predetermined threshold.
摘要:
An image forming apparatus includes a rotatable image bearing member; a plurality of rotatable developer carrying members contactable to a surface of the image bearing member to supply developers to electrostatic latent images formed on the surface, respectively; a plurality of developing devices in each of which the developer carrying member is provided; a developing device supporting member rotatable codirectionally with a rotational direction of the image bearing member and integrally supporting the plurality of such developing devices, wherein the developer carrying members is capable of contacting to and spacing from the surface of the image bearing member sequentially by rotation of the developing device supporting member; a peripheral speed of the developing device supporting member divided by a peripheral speed of the image bearing member at the time when the developer carrying member departs from the surface of the developer carrying member after contact of the developer carrying member to the surface of the image bearing member and subsequent development of the electrostatic latent image is larger than 0 and smaller than 1.
摘要:
An image forming apparatus includes a developing device, a detection mode execution unit, and a notice signal generating unit. The developing device supplies a toner bearing member with toner in a container by rotating a toner supply member in a contact manner with the toner bearing member. The detection mode execution unit executes a detection mode in which a predetermined period for changing a toner amount in the foam layer by rotating the toner supply member is provided, a capacitance C1 between the first and second electrode members is detected before the predetermined period, and a capacitance C2 between the first and second electrode members is detected after the predetermined period. The notice signal generating unit generates a low toner amount notice signal in response to an absolute value |C1−C2| of a difference between the capacitances C1 and C2 being smaller than a predetermined threshold.
摘要:
In an image forming apparatus of a rotary type, when a pause is made during continuous image formation, the time taken to restart image formation after the pause is shortened so as to reduce stress on the user. In the image forming apparatus, it is determined beforehand whether the next image formation mode is a color mode or a mono mode, and a developing device to be first used in the next image formation mode is moved to a developing standby position.