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US 12,631,998 B2Granted
Image forming apparatus
AssigneeKYOCERA Document Solutions Inc.
InventorsKoji Uno, Keisuke Oba, Kazuaki Fujiwara
Life of this patent
Estimating the term…
Abstract
A control portion can perform printing operation and to determine a transfer voltage for performing it, transfer voltage setting operation. When performing adjusting operation, the control portion estimates the amount of static charge of toner in a development device to determine the transfer voltage based on the estimated amount of static charge of the toner and the resistance value of a transferring member previously stored in a memory.
Claims6
An image forming apparatus comprising:
- an image forming portion including
- an image carrying member having a photosensitive layer formed on a surface thereof,
- a charging device having a charging member that electrostatically charges the image carrying member,
- an exposure device that exposes to light the image carrying member electrostatically charged by the charging device to form an electrostatic latent image, and
- a development device disposed opposite the image carrying member and having a developer carrying member that carries developer, the development device attaching toner to the electrostatic latent image formed on the image carrying member to form a toner image;
- a transferring member disposed opposite the image carrying member, the transferring member, with a predetermined transfer voltage applied thereto, transferring the toner image formed on the image carrying member to a transfer destination member;
- a development voltage power supply that applies to the developer carrying member a development voltage having an alternating-current voltage superposed on a direct-current voltage;
- a charging voltage power supply that applies a charging voltage to the charging member;
- a transfer voltage power supply that applies the transfer voltage to the transferring member;
- a control portion that controls the image forming portion, the development voltage power supply, the charging voltage power supply, and the transfer voltage power supply;
- and
- a memory that stores a resistance value of the transferring member,
- wherein
- the control portion can perform printing operation and can perform transfer voltage setting operation to determine the transfer voltage for performing the printing operation, and
- when performing the transfer voltage setting operation, the control portion estimates an amount of static charge of the toner in the development device to determine the transfer voltage based on the estimated amount of static charge of the toner and the resistance value of the transferring member previously stored in the memory.
12 more elements
Dependencies are inferred from the claim text.