Abstract: In an inkjet printing apparatus an inkjet printhead has a plurality of inkjet nozzles which eject ink onto media located within a print-zone. A drive shaft is located upstream of the printhead and is incrementally rotated to advance the media. The drive shaft has a longitudinal axis, a first radius over a central length and a second radius less than the first radius at a first recess and a second recess, each said recess being peripheral to the central length. A plurality of pinch devices stabilize the media against the drive shaft. A first guide is aligned with the first recess and is spaced from an axis of the drive shaft by a first distance which is less than the first radius. A second guide is aligned with the second recess and is spaced from the axis by a second distance less than the first radius.
Type:
Grant
Filed:
January 31, 2002
Date of Patent:
October 26, 2004
Assignee:
Hewlett-Packard Development Company, L.P.
Inventors:
Steve O. Rasmussen, Robert M. Yraceburu, Steven P. Downing, Stuart D. Spencer, Jason S. Belbey, Vance M. Stephens
Abstract: In a pressure device for a printer comprising a support element which can be fixed to a frame of the printer and a flexible plate fixed to the support element in order to press a printing substrate against a platen in the vicinity of a printing line, the support element includes a turned-over portion bent onto a remaining portion of the support element in order to restrain a portion of the flexible plate.
Type:
Grant
Filed:
September 21, 1999
Date of Patent:
November 20, 2001
Assignee:
Compuprint S.p.A.
Inventors:
Paolo Urso, Fiorino Maggi, Rinaldo Fiore, Giuseppe Boero