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US 7,434,927 B2Granted
Inkjet recording device
AssigneeRicoh Company, Ltd.
InventorsHideomi Sakuma, Shinji Imoto, Yohichi Itoh, Hiroshi Yasuda, Akira Ishii
Life of this patent
Estimating the term…
Abstract
An inkjet recording device is disclosed that is capable of precisely defining the gap between a conveyance belt and a recording head and maintaining good flatness of the conveyance belt and a recording medium being conveyed. A guide unit is arranged to push a portion of the conveyance belt from the inner side to approach the recording unit. The guide unit has a number of projecting ribs formed on the surface of the guide unit in contact with the conveyance belt and arranged to be perpendicular to the rolling direction of the conveyance belt.
Claims19
An inkjet recording device, comprising:
- a conveyance belt tensioned on a plurality of rollers for conveying a recording medium while rolling, said conveyance belt being charged to hold the recording medium thereon for conveyance;
- a recording unit configured to eject ink onto the recording medium on the conveyance belt;
- and
- a guide unit arranged on the inner side of the conveyance belt facing the recording unit between two of the rollers, wherein
- said guide unit includes a plurality of projecting stripes in contact with the conveyance belt, a top surface of said projecting stripes forming a guide surface,
- said projecting stripes are arranged in a direction perpendicular to a rolling direction of the conveyance belt, and said guide surface comprising the top surfaces of said projecting stripes pushes a portion of the conveyance belt corresponding to said guide surface so that die pushed portion of the conveyance belt approaches the recording unit,
- the recording unit covers a part of the projecting stripes of the guide unit, and
- the projecting swipes of the guide unit are arranged on an upstream side in a direction of conveying the recording medium relative to a position facing the recording unit.
5 more elements
An inkjet recording device, comprising:
- a conveyance belt tensioned on a plurality of rollers for conveying a recording medium while rolling, said conveyance belt being charged to hold the recording medium thereon for conveyance;
- a recording unit configured to eject ink onto the recording medium on the conveyance belt;
- a guide unit arranged on the inner side of the conveyance belt facing the recording unit between two of the rollers;
- and
- delivering rollers arranged to carry the recording medium conveyed by the conveyance belt after recording so as to further convey the recording medium, a height where said delivering rollers carry the recording medium being lower than the height of an upper face of said guide unit in contact with the conveyance belt, wherein
- said guide unit includes a plurality of projecting stripes in contact with the conveyance belt, a top surface of said projecting stripes fanning a guide surface,
- said projecting stripes are arranged in a direction perpendicular to a railing direction of the conveyance belt, and said guide surface comprising the top surfaces of said projecting stripes pushes a pardon of the conveyance belt corresponding to said guide surface so that the pushed portion of the conveyance belt approaches the recording unit,
- the recording unit covers a part of the projecting stripes of the guide unit, and
- the projecting stripes of the guide unit are arranged on an upstream side in a direction of conveying the recording medium relative to a position facing the recording unit.
6 more elements
An image forming apparatus, comprising:
- a conveyance belt tensioned on a plurality of rollers for conveying a recording medium while rolling, said conveyance belt being charged to hold the recording medium thereon for conveyance;
- a recording unit configured to eject ink onto the recording medium on the conveyance belt;
- and
- a guide unit arranged on the inner side of the conveyance belt facing the recording unit between two of the rollers, wherein
- said guide unit includes a plurality of projecting stripes in contact with the conveyance belt, a top surface of said projecting stripes forming a guide surface,
- said projecting stripes are arranged in a direction perpendicular to a rolling direction of the conveyance belt, and said guide surface comprising the top surfaces of said projecting strips pushes a portion of the conveyance belt corresponding to said guide surface so that the pushed portion of the conveyance belt approaches the recording unit,
- the recording unit covers a part of the projecting stripes of the guide unit, and
- the projecting stripes of the guide unit are arranged on an upstream side in a direction of conveying the recording medium relative to a position facing the recording unit.
5 more elements
An image forming apparatus, comprising:
- a conveyance belt tensioned on a plurality of rollers for conveying a recording medium while rolling, said conveyance belt being charged to hold the recording medium thereon for conveyance:
- a recording unit configured to eject ink onto the recording medium on the conveyance belt;
- a guide unit arranged on the inner side of the conveyance belt facing the recording unit between two of the rollers;
- and
- delivering rollers arranged to carry the recording medium conveyed from the conveyance belt after recording so as to further convey the recording medium, a height where said delivering rollers carry the recording medium being lower than the height of an upper face of said guide unit in contact with the conveyance belt, wherein
- said guide unit includes a plurality of projecting stripes in contact with the conveyance belt, a top surface of said projecting stripes forming a guide surface,
- said projecting stripes are arranged in a direction perpendicular to a rolling direction of the conveyance belt, and said guide surface comprising the top surfaces of said projecting stripes pushes a portion of the conveyance belt corresponding to said guide surface so tat the pushed portion of the conveyance belt approaches the recording unit,
- the recording unit covers a pan of the projecting stripes of the guide unit, and
- the projecting stripes of the guide unit are arranged on an upstream side in a direction of conveying the recording medium relative to a position facing the recording unit.
6 more elements
A sheet conveyance device configured to convey a recording medium to a recording unit for ejecting ink onto the recording medium, comprising:
- a conveyance belt tensioned on a plurality of rollers for conveying a recording medium while rolling, said conveyance belt being charged to hold the recording medium thereon for conveyance;
- and
- a guide unit arranged on the inner side of the conveyance belt between two of the rollers, wherein
- said guide unit includes a plurality of projecting stripes in contact with the conveyance belt, a top surface of said projecting stripes forming a guide surface,
- said projecting stripes are arranged in a direction perpendicular to a rolling direction of the conveyance belt, and said guide surface comprising the top surfaces of said projecting stripes pushes a portion of the conveyance belt corresponding to said guide surface from the inner side of the conveyance belt to outside of the conveyance belt so that the pushed portion of the conveyance belt is projected,
- the recording unit covers a part of the projecting stripes of the guide unit, and
- the projecting stripes of the guide unit are arranged on an upstream side in a direction of conveying the recording medium relative to a position facing the recording unit.
4 more elements
A sheet conveyance device configured to convey a recording medium to a recording unit for ejecting ink onto the recording medium, comprising:
- a conveyance belt tensioned on a plurality of rollers for conveying a recording medium while rolling, said conveyance belt being charged to hold the recording medium thereon for conveyance;
- a guide unit arranged on the inner side of the conveyance belt facing the recording unit between two of the rollers;
- and
- delivering rollers arranged to carry the recording medium conveyed from the conveyance belt after recording so as to further convey the recording medium, a height where said delivering rollers carry the recording medium being lower than the height of the upper face of said guide unit in contact with the conveyance belt, wherein
- said guide unit includes a plurality of projecting stripes in contact with the conveyance belt, a top surface of said projecting stripes fainting a guide surface;
- and
- said projecting stripes are arranged in a direction perpendicular to a rolling direction of the conveyance belt, and said guide surface comprising the top surfaces of said projecting stripes pushes a portion of the conveyance belt corresponding to said guide surface so that the pushed portion of the conveyance belt approaches the recording unit.
4 more elements
Dependencies are inferred from the claim text.