Transfer apparatus and image forming apparatus
AssigneeSeiko Epson Corporation
InventorsMasahide NAKAMURA, Ken IKUMA
Life of this patent
Estimating the term…
Abstract
A transfer apparatus includes a transfer belt being configured to carry an image, a transfer roller having an elastic layer and being configured to transfer the image from the transfer belt onto a transfer material, and a backup roller being configured to have pressure against the transfer roller with the transfer belt therebetween in order to form a transfer nip portion. The transfer nip portion includes a pressure-contact nip and a contact nip. A length of the contact nip is smaller than half a length of the pressure-contact nip in the rotational direction of the transfer roller.
Claims8
A transfer apparatus comprising:
- a transfer belt that carries an image, and has an elastic layer;
- a transfer roller that:
- transfers the image from the transfer belt onto a transfer material;
- has an elastic layer, and
- forms a transfer nip portion;
- a backup roller which is opposite to the transfer roller with the transfer belt therebetween,
- the transfer nip portion including a pressure-contact nip formed in an area where the transfer belt is in contact with the transfer roller and the backup roller by a pressure, and a contact nip formed in an area where the transfer belt is in contact with the transfer roller and is no contact with the backup roller,
- a length of the contact nip in a rotational direction of the transfer roller being smaller than half a length of the pressure-contact nip in the rotational direction of the transfer roller.
An image forming apparatus comprising:
- a latent image carrier on which a latent image is formed;
- a developing portion that develops the latent image with a developer;
- a transfer belt that carries a image developed by the developing portion, the transfer belt having an elastic layer;
- a transfer roller that:
- transfers the image from the transfer belt onto a transfer material;
- has an elastic layer;
- and
- forms a transfer nip portion,
- a backup roller which is opposite to the transfer roller with the transfer belt therebetween, and
- a fixing unit that fixes the image on the transfer material after the image is transferred to the transfer martial,
- the transfer nip portion including a pressure-contact nip formed in an area where the transfer belt is in contact with the transfer roller and the backup roller by a pressure, and a contact nip formed in an area where the transfer belt is in contact with the transfer roller and is no contact with the backup roller,
- a length of the contact nip in a rotational direction of the transfer roller being smaller than half a length of the pressure-contact nip in the rotational direction of the transfer roller.
Dependencies are inferred from the claim text.