公开(公告)号：WO1996026839A1

公开(公告)日：1996-09-06

申请号：PCT/US1996002699

申请日：1996-02-28

Applicant: HEWLETT-PACKARD COMPANY

Inventor： HEWLETT-PACKARD COMPANY ,  PATRICK, Jeffrey, G. ,  JACKSON, Larry, A.

IPC: B41J13/00

CPC classification number: B41J11/005 ,  B41J13/14

Abstract: Described herein is a printer having a printhead (102) which traverses laterally across a sheetlike print medium (110) and which thereby defines a laterally-extending print zone across the print medium. A paper transport mechanism in the printer has drive rollers (114) and associated pinch wheels (180) to drive the print medium through the printer's print zone. The paper transport mechanism further includes an upper print media guide (202) and a lower print medium guide (126). The two print medium guides are shaped at their transverse ends to bow the transverse edges of the print medium downwardly to reduce its tendency to buckle upwardly into the printhead. In order to fit the upper print medium guide into the limited available space above the drive rollers, it is made of a lower molded portion (170) for paper contact and an upper backing portion (172) for rigidity. A pinch finger (191) extends toward the printer's print zone beyond the pinch wheels to establish a pinch point (192) against the drive roller in near proximity to the print zone. To facilitate ejection of printed pages, the upper print medium guide is formed with a series of ribs (204) which contact the paper. The ribs reduce friction and static buildup, and make it easier to push the paper from the paper transport mechanism.

Abstract translation: 这里描述的是具有打印头（102）的打印机，该打印头横向穿过片状的打印介质（110），从而限定穿过打印介质的横向延伸的打印区域。 打印机中的纸张传送机构具有驱动辊（114）和相关联的夹紧轮（180），以通过打印机的打印区驱动打印介质。 纸张传送机构还包括上打印介质引导件（202）和下打印介质引导件（126）。 两个打印介质引导件在其横向端部成形，以向下弯曲打印介质的横向边缘，以减少其向上压入打印头的趋势。 为了将上部打印介质引导件装配到驱动辊上方的有限可用空间中，它由用于纸张接触的下部模制部分（170）和用于刚性的上部背衬部分（172）制成。 挤压手指（191）朝向打印机的打印区域延伸超过夹紧轮以在靠近打印区域的位置建立抵靠驱动辊的夹点（192）。 为了便于打印页的排出，上部打印介质引导件形成有一系列与纸接触的肋（204）。 这些肋骨减少了摩擦和静电积累，并且使纸张从纸张传送机构更容易地推动。