公开(公告)号：US20220063314A1

公开(公告)日：2022-03-03

申请号：US17420731

申请日：2019-01-09

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Matthew William Tivnon ,  Owen P. Columbus ,  Ken Maclean ,  Mickey Chia-Yu Yuan ,  Yun Fei Zhu

IPC: B41J29/02 ,  B41J2/32

Abstract: A vertical column printing device may include a print engine formed within a base housing of the vertical column printing device; a door biased by a spring away from the print engine to be selectively opened to expose the print engine; and a geared platen formed on the door to interface with the print engine to drive a roll of paper past the print engine when the door is engaged with the based housing.

公开(公告)号：US20210361085A1

公开(公告)日：2021-11-25

申请号：US17045508

申请日：2018-09-14

Applicant: Yunfei ZHU ,  Hewlett-Packard Development Company, L.P.

Inventor： Yun Fei Zhu

IPC: A47F10/02 ,  F16C11/10 ,  H05K5/02

Abstract: A display tilting apparatus (300) may include a spindle (310), a middle bearing (312) mounted on the spindle (310) and coupled to a moving bracket (304), a pair of damping thrust bearings (314) mounted on the spindle (310) and coupled to a fixed bracket (306), and a ratchet-pawl assembly (316) mounted on the spindle (310) and coupled to the moving bracket (304). The ratchet-pawl assembly (316) may cause the spindle (310) and the middle bearing (312) to rotate with the moving bracket (304) during pivoting of the moving bracket (304) to a first direction (320) such that the pair of damping thrust bearings (314) may provide a first frictional force to the moving bracket (304) in the first direction (320). Further, the middle bearing (312) may provide a second frictional force to the moving bracket (304) during pivoting of the moving bracket (304) to a second direction (322) that is opposite to the first direction (320).