US 12,449,764 B2
Image forming apparatus to remove foreign body from print media detection sensor
Youngjun Choi, Seongnam Si (KR); Taegon Kim, Seongnam Si (KR); and Seungkyu Lee, Seongnam Si (KR)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 18/700,117
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Mar. 28, 2022, PCT No. PCT/US2022/022159
§ 371(c)(1), (2) Date Apr. 10, 2024,
PCT Pub. No. WO2023/063989, PCT Pub. Date Apr. 20, 2023.
Claims priority of application No. 10-2021-0134740 (KR), filed on Oct. 12, 2021.
Prior Publication US 2025/0231527 A1, Jul. 17, 2025
Int. Cl. G03G 21/00 (2006.01); G01N 21/00 (2006.01); G01N 21/15 (2006.01); G01N 21/86 (2006.01); G03G 21/20 (2006.01)
CPC G03G 21/206 (2013.01) [G01N 21/15 (2013.01); G01N 21/86 (2013.01); G03G 2215/00616 (2013.01); G03G 2221/1645 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a fixer;
a print medium detection sensor adjacent to the fixer and to detect movement of a print medium;
a fan adjacent to the fixer and to the print medium sensor; and
a processor to control the image forming apparatus to heat the fixer for an image forming job, and based on a voltage value of an output signal of the print medium detection sensor not being in a predetermined range, to drive the fan to remove a foreign body on a surface of the print medium detection sensor so that the voltage value of the output signal of the print medium detection sensor is in the predetermined range.