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US 6,665,512 B1Granted
Image forming apparatus
AssigneeRicoh Company, Ltd.
InventorsMasato Yanagida, Tadashi Hayakawa
Life of this patent
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Abstract
An image forming apparatus includes a transfer roller pressed against an image carrier for transferring an image from the image carrier to a recording medium being conveyed via a nip between the transfer roller and the image carrier. The transfer roller is positioned in an angular range of less than ±90° from the top of said image carrier in the direction of rotation of the image carrier. In addition, the transfer roller has a greater diameter at its opposite end portions than at its center portion in the axial direction thereof.
Claims5
An image forming apparatus comprising:
- an image carrier;
- and
- an elastic transfer roller configured to press against said image carrier, and configured to convey a recording medium between said elastic transfer roller and said image carrier to thereby transfer a toner image from said image carrier to said recording medium, said elastic transfer roller positioned in an angular range of less than 45° from a top of said image carrier in a direction of rotation of said image carrier and has a greater diameter at opposite end portions than at a center portion in an axial direction of said transfer roller,
- wherein the top of said image carrier is a line on an upper side of said image carrier intersecting a plane through a rotational axis of the image carrier and perpendicular to a horizon.
1 more element
Dependencies are inferred from the claim text.