公开(公告)号：US10768567B2

公开(公告)日：2020-09-08

申请号：US15744612

申请日：2016-07-07

Applicant: HP PRINTING KOREA CO., LTD.

Inventor： Young Goo Kang ,  Ji Hoon Woo ,  Jin Soo Lee

IPC: G03G15/00 ,  B65H1/26

Abstract: An image forming apparatus comprises a housing, a cassette insertable into the housing to store printing sheets; an automatic mounting apparatus provided between the housing and the cassette and to allow the cassette to be mounted thereon, where the automatic mounting apparatus comprises an engaging portion configured to protrude on a side surface of the cassette, a rail portion provided in the housing, and a locking device provided at the rear side of the rail portion to interfere with the engaging portion.

公开(公告)号：US11117761B2

公开(公告)日：2021-09-14

申请号：US16474448

申请日：2018-01-05

Applicant: HP PRINTING KOREA CO., LTD.

Inventor： Eiji Aoki ,  Jin Soo Lee

IPC: B65H3/06 ,  B65H7/12 ,  G03G15/00 ,  B65H3/52

Abstract: A sheet feeding apparatus includes a sheet stacker to stack at least one sheet; a sheet feed roller disposed at one side of the sheet stacker and to feed a sheet fed from the sheet stacker; a multi-feed prevention roller disposed to face the sheet feed roller and to prevent multi-feed of the sheet fed from the sheet stacker; a magnetic torque limiter disposed coaxially with the multi-feed prevention roller; a hall sensor disposed at one side of the magnetic torque limiter and to detect rotation of the magnetic torque limiter; and a controller configured to rotate the sheet feed roller in a state in which the sheet feed roller and the multi-feed prevention roller are in contact with each other without a sheet and to identify a lifetime of the multi-feed prevention roller by using a signal output from the hall sensor.