# US 8,150,290 B2 · Method and apparatus for saving power in an image production device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,150,290 B2 - Document ID: US8150290B2 - Status: Granted - Kind: B2 - Application number: 12/485,978 - Filed: 2009-06-17 - Published: 2010-12-23 - Granted: 2012-04-03 - Earliest claimed: 2009-06-17 - Assignees: Xerox Corporation - Inventors: Michael A. Demuren; David Lee Everhart; Linda P. Lafrance; Franley H. Sanchez - Web page: https://patentgrep.com/patent/US8150290B2 ## CPC - G03G 15/2064: {combined with pressure} - G03G 15/5004: {Power supply control, e.g. power-saving mode, automatic power turn-off} - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract A method and apparatus for saving power in an image production device is disclosed. The method may include determining if the image production device has been inactive for a predetermined period of time, wherein if it is determined that the image production device has been inactive for a predetermined period of time, decreasing a fuser fan's output by a predetermined amount, decreasing a fuser lamp setting by a predetermined amount, the fuser system being heated to operate at a temperature that is at a first predetermined level, setting a timer, determining if the fuser system's temperature is at a second predetermined level, wherein if it is determined that the fuser system's temperature is not at the second predetermined level, determining if the timer expired, wherein if it is determined that the timer expired, decreasing a fuser lamp setting by the predetermined amount and resetting the timer. ## Claims ### Claim 1 A method for saving power in an image production device, comprising: determining if the image production device has been inactive for a predetermined period of time, wherein if it is determined that the image production device has been inactive for a predetermined period of time, decreasing a fuser fan's output by a predetermined amount, the fuser fan blowing air in the vicinity of a fuser system to cool the fuser system; decreasing a fuser lamp setting by a predetermined amount, the fuser lamp being capable of heating the fuser system to a desired temperature, the fuser system being heated to operate at a temperature that is at a first predetermined level; setting a timer; determining if the fuser system's temperature is at a second predetermined level, the second predetermined level being a lower temperature than the first predetermined level, wherein if it is determined that the fuser system's temperature is not at the second predetermined level, determining if the timer expired, wherein if it is determined that the timer expired, decreasing a fuser lamp setting by the predetermined amount and resetting the timer, wherein the steps of decreasing the fuser lamp setting by the predetermined amount, resetting the timer, and determining if the fuser system's temperature is at the second predetermined level, are performed until one of the fuser system's temperature reaches the second predetermined level, the image production device is determined to be active, and the image production device is powered off. ### Claim 2 (depends on 1) The method of claim 1, wherein the fuser system's temperature is determined to be at the second predetermined level, entering a low power mode; and holding the fuser system's temperature at the second predetermined level. ### Claim 3 (depends on 1) The method of claim 1, further comprising: determining if the image production device is active, wherein if it is determined that the image production is active, entering an operating mode; increasing the fuser fan output; and increasing the fuser lamp settings to increase the fuser's system's temperature to the first predetermined level. ### Claim 4 (depends on 3) The method of claim 3, wherein the image production device is determined to be active by the use of at least one of a user interface, a button, a mouse, a touch screen, a stylus, a door, and a cover. ### Claim 5 (depends on 1) The method of claim 1, wherein the first predetermined level is approximately 180° C.-190° C., the second predetermined level is approximately 135° C.-145° C., and the predetermined amount of decrease in the fuser lamp setting is approximately 5° C.-10° C. ### Claim 6 (depends on 1) The method of claim 1, wherein the timer is one of incremented and decremented. ### Claim 7 (depends on 1) The method of claim 1, wherein the image production device is one of a copier, a printer, a facsimile device, and a multi-function device. ### Claim 8 An image production device, comprising: a memory that stores predetermined values relating to saving power; a fuser temperature sensor that senses the temperature of a fuser system; one or more timers; a fuser fan that blows air in the vicinity of a fuser system to cool the fuser system; a fuser lamp that is capable of heating the fuser system to a desired temperature, the fuser system being heated to operate at a temperature that is at a first predetermined level; and a power saving unit that determines if the image production device has been inactive for a predetermined period of time, wherein if the power saving unit determines that the image production device has been inactive for a predetermined period of time, the power saving unit decreases the fuser fan's output by a predetermined amount, decreases the fuser lamp setting by a predetermined amount, sets one of the one or more timers, determines if the fuser system's temperature is at a second predetermined level using the fuser temperature sensor, wherein if the power saving unit determines that the fuser system's temperature is not at the second predetermined level, the power saving unit determines if the set timer has expired, wherein if the power saving unit determines that the set timer has expired, the power saving unit decreases the fuser lamp setting by the predetermined amount and resets the timer, wherein the second predetermined level is lower temperature than the first predetermined level and the power saving unit decreases the fuser lamp setting by the predetermined amount, resets the timer, and determines if the fuser system's temperature is at the second predetermined level, until one of the fuser system's temperature reaches the second predetermined level, the image production device is active, and the image production device is powered off. ### Claim 9 (depends on 8) The image production device of claim 8, wherein if the power saving unit determines the fuser system's temperature to be at the second predetermined level, the power saving unit enters the image production device in a low power mode and holds the fuser system's temperature at the second predetermined level. ### Claim 10 (depends on 8) The image production device of claim 8, wherein if the power saving unit determines that the image production is active, the power saving unit enters the image production device in an operating mode, increases the fuser fan output, and increases the fuser lamp settings to increase the fuser's system's temperature to the first predetermined level. ### Claim 11 (depends on 10) The image production device of claim 10, wherein the power saving unit determines the image production device to be active by the use of at least one of a user interface, a button, a mouse, a touch screen, a stylus, a door, and a cover. ### Claim 12 (depends on 8) The image production device of claim 8, wherein the first predetermined level is approximately 180° C.-190° C., the second predetermined level is approximately 135° C.-145° C., and the predetermined amount of decrease in the fuser lamp setting is approximately 5° C.-10° C. ### Claim 13 (depends on 8) The image production device of claim 8, wherein the timer is one of incremented and decremented. ### Claim 14 (depends on 8) The image production device of claim 8, wherein the image production device is one of a copier, a printer, a facsimile device, and a multi-function device. ### Claim 15 A non-transitory computer-readable medium storing instructions for controlling a computing device for saving power in an image production device, the instructions comprising: determining if the image production device has been inactive for a predetermined period of time, wherein if it is determined that the image production device has been inactive for a predetermined period of time, decreasing a fuser fan's output by a predetermined amount, the fuser fan blowing air in the vicinity of a fuser system to cool the fuser system; decreasing a fuser lamp setting by a predetermined amount, the fuser lamp being capable of heating the fuser system to a desired temperature, the fuser system being heated to operate at a temperature that is at a first predetermined level; setting a timer; determining if the fuser system's temperature is at a second predetermined level, the second predetermined level being a lower temperature than the first predetermined level, wherein if it is determined that the fuser system's temperature is not at the second predetermined level, determining if the timer expired, wherein if it is determined that the timer expired, decreasing a fuser lamp setting by the predetermined amount and resetting the timer, wherein the steps of decreasing the fuser lamp setting by the predetermined amount, resetting the timer, and determining if the fuser system's temperature is at the second predetermined level, are performed until one of the fuser system's temperature reaches the second predetermined level, the image production device is active, and the image production device is powered off. ### Claim 16 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the fuser system's temperature is determined to be at the second predetermined level, entering a low power mode; and holding the fuser system's temperature at the second predetermined level. ### Claim 17 (depends on 15) The non-transitory computer-readable medium of claim 15, further comprising: determining if the image production device is active, wherein if it is determined that the image production is active, entering an operating mode; increasing the fuser fan output; and increasing the fuser lamp settings to increase the fuser's system's temperature to the first predetermined level. ### Claim 18 (depends on 17) The non-transitory computer-readable medium of claim 17, wherein the image production device is determined to be active by the use of at least one of a user interface, a button, a mouse, a touch screen, a stylus, a door, and a cover. ### Claim 19 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the first predetermined level is approximately 180° C.-190° C., the second predetermined level is approximately 135° C.-145° C., and the predetermined amount of decrease in the fuser lamp setting is approximately 5° C.-10° C. ### Claim 20 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the timer is one of incremented and decremented. ### Claim 21 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the image production device is one of a copier, a printer, a facsimile device, and a multi-function device.