Media handling in an ink-jet printer

Details Media handling in an ink-jet printer Media handling in an ink-jet printer

1995-02-28

1996-06-18

Hilten, John S.

Typewriting machines

Sheet or web

Including sheet guide

271209, B41J 1314

Patent

active

055271235

ABSTRACT:
Described herein is a printer having a printhead which traverses laterally across a sheetlike print medium and which thereby defines a laterally-extending print zone across the print medium. A paper transport mechanism in the printer has drive rollers and associated pinch wheels to drive the print medium through the printer's print zone. The paper transport mechanism further includes an upper print media guide and a lower print medium guide. 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 for paper contact and an upper backing portion for rigidity. A pinch finger extends toward the printer's print zone beyond the pinch wheels to establish a pinch point against the drive roller in near proximity to the print zone.

REFERENCES:
patent: 5356229 (1994-10-01), Hickman et al.
patent: 5393151 (1995-02-01), Martin et al.
HP Patent Application, S/N 08/057,364, Filed on Apr. 30, 1993 "Combined Central and Lateral Hold-Down Plates, and End-Of-Page Advance Decrease, In Liquid-Ink Printers".
HP Patent Application, S/N 08/056,229, File Apr. 30, 1993, "Imporved Media Control At Ink-Jet Print Zone".

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