Recording member feeding device with detecting means for improved precision and image forming apparatus containing same
AssigneeCanon Kabushiki Kaisha
InventorSoichi Hiramatsu
Life of this patent
Estimating the term…
Abstract
A recording member feeding device feeds a recording member such as a sheet in an image recording apparatus such as a copying machine. The recording member feeding device has a feeding rotary unit, a driving unit for driving the feeding rotary unit, and a driving power transmitting unit for transmitting he power of the driving unit to the feeding rotary unit. The recording member feeding device further has a rotation detecting unit for detecting the number of rotations of a rotary part in the rotary driving unit or in the driving power transmitting unit. The feeding rotary unit feeds the recording member by a length which is determined by the number of complete rotations detected by the rotation detecting units.
Claims22
A recording member feeding device, comprising:
- a feed roller for feeding a recording member;
- a feed motor for driving said feed roller;
- driving power transmitting means for transmitting the driving power from the feed motor to said feed roller;
- detecting means for measuring an amount of rotation of said feed roller, said detecting means comprising an encoder scale member mounted on said feed motor and an encoder scale sensor for detecting the amount of rotation of the encoder scale member;
- and
- a controller which stops the feeding operation by said feed roller when an integral multiple of one complete rotation of the encoder scale member is detected.
An image recording apparatus, comprising:
- a feed roller for feeding a recording member;
- a feed motor for driving said feed roller;
- driving power transmitting means for transmitting the driving power from the feed motor to said feed roller;
- and
- detecting means for measuring an amount of rotation of said feed roller, said detecting means comprising an encoder scale member mounted on said feed motor and an encoder scale sensor for detecting the amount of rotation of the encoder scale member;
- image recording means for recording an image on the recording member fed by said feed roller;
- and
- a controller which stops the feeding operation by said feed roller when an integral multiple of one complete rotation of the encoder scale member is detected.
A recording member feeding device, comprising:
- a feed roller for feeding a recording member;
- a feed motor for driving said feed roller;
- driving power transmitting means for transmitting the driving power from the feed motor to said feed roller;
- detecting means for measuring an amount of rotation of the feed roller, said detecting means comprising an encoder scale member mounted on said driving power transmitting means and an encoder scale sensor for detecting the amount of rotation of the encoder scale member;
- and
- a controller which stops the feeding operation by the feed roller when an integral multiple of one complete rotation of the encoder scale member is detected.
An image forming apparatus, comprising:
- a feed roller for feeding a recording member;
- a feed motor for driving said feed roller;
- driving power transmitting means for transmitting the driving power from the feed motor to said feed roller;
- detecting means for measuring an amount of rotation of the feed roller, said detecting means comprising an encoder scale member mounted on said driving power transmitting means and an encoder scale sensor for detecting the amount of rotation of the encoder scale member;
- and
- a controller which stops the feeding operation by the feed roller when an integral multiple of one complete rotation of the encoder scale is detected, and
- image recording means for recording an image on a recording member fed by said feed roller.
A recording member feeding device, comprising;
- a feed roller with a feed roller gear for feeding a recording member;
- a feed motor with feed motor gear for driving said feed roller;
- driving power transmitting means for transmitting the driving power from the feed motor gear to said feed roller gear;
- detecting means for measuring an amount of rotation of said feed roller, said detecting means comprising an encoder scale member mounted on said driving power transmitting means and an encoder scale sensor for detecting the amount of rotation of the encoder scale member;
- and
- a controller which stops the feeding operation by said feed roller when an integral multiple of one complete rotation of the encoder scale member is detected.
Dependencies are inferred from the claim text.