Image forming apparatus
AssigneeBrother Kogyo Kabushiki Kaisha
InventorMakoto Souda
Life of this patent
Estimating the term…
Abstract
An image forming apparatus is configured to form a developer image on a recording sheet. The image forming apparatus includes a fixing unit including a pressure roller and a heat roller, an ejection roller configured to cause the recording sheet from the fixing unit to be ejected from the image forming apparatus, and a power transmission member configured to transmit power from the heat roller to cause the ejection roller to rotate. The pressure roller is configured to rotate in response to power and configured to cause the heat roller to be rotated.
Claims12
An image forming apparatus configured to form a developer image on a recording sheet, comprising:
- a fixing unit configured to fix the developer image onto the recording sheet by heat, the fixing unit including a pressure roller, a heat roller, and a drive gear fixed to a shaft of the pressure roller, the pressure roller being configured to rotate in response to power from the drive gear, and the pressure roller being configured to contact a peripheral surface of the heat roller and to transmit the power to the peripheral surface of the heat roller such that the heat roller rotates;
- an ejection roller configured to eject the recording sheet conveyed from the fixing unit from the image forming apparatus;
- and
- a power transmission member configured to transmit the power from the heat roller to the ejection roller such that the ejection roller rotates, the power transmission member including a first gear fixed to a shaft of the heat roller,
- wherein the drive gear is spaced apart from the first gear.
One or more non-transitory computer readable media having computer executable instructions stored thereon, which when executed by a processor, perform a method of controlling printing comprising the steps of:
- measuring a fixing time for fixing an image to a recording sheet between when a leading end of the recording sheet passes a first sensor and when a trailing end of the recording sheet passes the first sensor;
- measuring a transfer time for transferring the image to the recording sheet between when the leading end of the recording sheet passes a second sensor and when the trailing end of the recording sheet passes the second sensor;
- calculating a difference between the transfer time and the fixing time;
- and
- controlling a drive source for driving a fixing unit that transmits power to an ejection roller, based on the difference between the transfer time and the fixing time.
An image forming apparatus configured to form a developer image on a recording sheet, comprising:
- a first gear configured to receive power from a power source;
- a first roller configured to rotate in response to the power from the first gear attached to a shaft of the first roller;
- a second roller configured to contact the first roller and receive power from the first roller such that the second roller rotates, wherein the first roller and the second roller are configured to fix the developer image onto the recording sheet;
- an ejection roller configured to eject the recording sheet conveyed from the first roller and the second roller out of the image forming apparatus;
- and
- a power transmission member configured to transmit the power from the second roller to the ejection roller such that the ejection roller rotates, the power transmission member including a second gear fixed to a shaft of the second roller,
- wherein the first gear is spaced apart from the second gear.
Dependencies are inferred from the claim text.