Temperature-measuring device that measures temperature of sheet, and image-forming apparatus using the same
US-2016231670-A1 · Aug 11, 2016 · US
Image forming apparatus and control method
US2020103794A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020103794-A1 |
| Application number | US-201916580859-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 24, 2019 |
| Priority date | Oct 2, 2018 |
| Publication date | Apr 2, 2020 |
| Grant date | — |
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- Title
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Abstract
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An image forming apparatus includes a heater, a first temperature sensor, a second temperature sensor, and processing circuitry. The heater is configured to heat a medium on which an image is formed. The first temperature sensor is configured to measure a temperature of the heater. The second temperature sensor is configured to measure a temperature of a region heated by the heater. The processing circuitry is configured to control the temperature of the heater. The processing circuitry is configured to control the heater based on a comparison between a measured temperature of the first temperature sensor and a first threshold value, and a comparison between a measured temperature of the second temperature sensor and a second threshold value.
First claim
Opening claim text (preview).
1 . An image forming apparatus comprising: a heater configured to heat a medium on which an image is formed; a first temperature sensor configured to measure a temperature of the heater; a second temperature sensor configured to measure a temperature of a region heated by the heater; and processing circuitry configured to control the temperature of the heater, wherein the processing circuitry is configured to control the heater based on a comparison between a measured temperature of the first temperature sensor and a first threshold value, and a comparison between a measured temperature of the second temperature sensor and a second threshold value. 2 . The image forming apparatus according to claim 1 , wherein a third threshold value is set higher than the first threshold value, wherein the processing circuitry is configured to suspend operation of the image forming apparatus when the measured temperature of the first temperature sensor is higher than the third threshold value. 3 . The image forming apparatus according to claim 1 , wherein the processing circuitry is configured to control the temperature of the heater according to a type of the medium. 4 . A method of controlling a heater included in an image forming apparatus and configured to heat a medium on which an image is formed, the method comprising: measuring a temperature of the heater; measuring a temperature of a region heated by the heater; and controlling the heater based on a comparison of the measured temperature of the heater and a first threshold value, and a comparison of the measured temperature of the region and a second threshold value. 5 . The method according to claim 4 , wherein the controlling further comprises suspending operation of the image forming apparatus when the measured temperature of the heater is higher than a third threshold value which is set higher than the first threshold value. 6 . The method according to claim 4 , wherein the controlling further comprises controlling the temperature of the heater according to a type of the medium. 7 . An image forming apparatus comprising: a heater heating a medium; a first temperature sensor measuring a temperature of the heater; a second temperature sensor measuring a temperature of a region heated by the heater; and a processor controlling the temperature of the heater, the processor operating the heater only when the temperature measured by the first temperature sensor is lower than a first threshold value and the temperature measured by the second temperature sensor is lower than a second threshold value. 8 . The image forming apparatus according to claim 7 , wherein the first threshold value is lower than the second threshold value. 9 . The image forming apparatus according to claim 7 , wherein the processor changes the second threshold value according to a type of the medium. 10 . The image forming apparatus according to claim 7 , further comprising: a conveyor transferring the medium; and a third temperature sensor disposed on the conveyor and in vicinity of the heater. 11 . The image forming apparatus according to claim 10 , wherein the processor operates the heater only when the temperature measured by the second temperature sensor is lower than the first threshold value, the temperature measured by the first temperature sensor is lower than the second threshold value, and a temperature measured by the third temperature sensor is lower than a third threshold value. 12 . The image forming apparatus according to claim 10 , wherein the third threshold value is substantially same as the second threshold value.
Assignees
Inventors
Classifications
arrangements for monitoring a plurality of temperatures, e.g. by multiplexing · CPC title
in respect of space · CPC title
Circuits arrangements for indicating a predetermined temperature (fire detection G08B17/00) · CPC title
- G03G15/2039Primary
with means for controlling the fixing temperature · CPC title
- B41J11/002Primary
Curing or drying the ink on the copy materials, e.g. by heating or irradiating · CPC title
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- What does patent US2020103794A1 cover?
- An image forming apparatus includes a heater, a first temperature sensor, a second temperature sensor, and processing circuitry. The heater is configured to heat a medium on which an image is formed. The first temperature sensor is configured to measure a temperature of the heater. The second temperature sensor is configured to measure a temperature of a region heated by the heater. The process…
- Who is the assignee on this patent?
- Kizaki Osamu, Nakai Junji, Yamada Masafumi, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification G03G15/2039. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Apr 02 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).