Image forming apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorAtsuhisa Nakashima
Life of this patent
Estimating the term…
Abstract
A tension roller is urged by a compression spring, and a position at which the tension roller contacts with a conveyance belt is set to a position coming close to a driven roller rather than a drive roller in such a manner as to prevent a portion of the conveyance belt, the portion pushed out by the drive roller, from being vibrated, and prevent the vibration from being transmitted to a portion of the conveyance belt, the portion on a passing region side of a recording medium (an encoder roller side), so as to run around the driven roller.
Claims26
An image forming apparatus comprising:
- an endless conveyance belt having an outer peripheral surface which serves as a mounting surface of a recording medium;
- a drive roller and a driven roller around which said conveyance belt is wound;
- a driving unit driving said drive roller;
- an encoder roller contacting with a portion of said conveyance belt, said portion moving toward said drive roller from said driven roller;
- an encoder detecting a rotational position of said encoder roller;
- a tension roller contacting with a portion of said conveyance belt, said portion moving toward said driven roller from said drive roller;
- a first urging unit urging said tension roller toward said conveyance belt;
- and
- a recording head ejecting ink to the recording medium conveyed by said conveyance belt,
- wherein a position at which said tension roller contacts with said conveyance belt is set to a position at which a length of the conveyance belt between said driven roller and said tension roller is shorter than a length of the conveyance belt between said tension roller and said drive roller.
An image forming apparatus comprising:
- an endless conveyance belt having an outer peripheral surface which serves as a mounting surface of a recording medium;
- a drive roller and a driven roller around which said conveyance belt is wound;
- drive means driving said drive roller;
- an encoder roller contacting with a portion of said conveyance belt, said portion moving toward said drive roller from said driven roller;
- an encoder detecting a rotational position of said encoder roller;
- a tension roller contacting with a portion of said conveyance belt, said portion moving toward said driven roller from said drive roller;
- first urging means urging said tension roller toward said conveyance belt;
- and
- a recording head ejecting ink to the recording medium conveyed by said conveyance belt,
- wherein a position at which said tension roller contacts with said conveyance belt is set to a position at which a length of the conveyance belt between said driven roller and said tension roller is shorter than a length of the conveyance belt between said tension roller and said drive roller.
Dependencies are inferred from the claim text.