Hewlett-packard Company

Hewlett-packard Development Company, L.p.

Kieran B. Kelly

Allan G. Olson

Blair M. Kent

Shannon D. Casey

Kieran B Kelly

Keith Jariabka

Allan G Olson

Larry A Jackson

Gene D Jones

Juan D Ramos

Robert Lawrence Winburne

Pierre Joseph Kaiser

William J Jennings

Joseph D Barbera

Babak Honaryar

Shannon D Casey

Daniel R Dwyer

Alan Shibata

Blair M Kent

Daniel James Magnusson

Kevin D O'Hara

Teressa L Roth

John James Cantrell

Michael M Leon

Craig D Sunada

Robert Paul Callaway

William Richard Huseby

Hai-Lung James Hung

Mark G Miranda

Shawn Michael Close

Prodpran Suetrong

Philip Stallbaumer

Chris A Rasmussen

R Scott Smith

Kok Leong Law

Embodiments provide methods, apparatuses, and systems for compressing media in a media stack. In various embodiments, a paddle moves between various positions. During the move, the paddle is configured to compress the media stack.

Media stack compression

A media transport assembly includes a loadstop drive assembly to gather and compress a media stack in a media tray before a pick and feed cycle, and a pick drive assembly to pick a sheet of media from the media stack and feed the sheet of media to a media path. The loadstop drive assembly is positioned on one side of a gear wall and the pick drive assembly is positioned on an opposite side of the gear wall such that the pick drive assembly is driven by the loadstop drive assembly through the gear wall.

Media transport

In one embodiment, a device for moving print media in a printer includes: a rotatable shaft extending lengthwise along an axis of rotation and a hub. The hub is operatively and pivotally connected to the shaft at a connection such that the hub rotates with the shaft about the axis of rotation and so that the hub may tilt on the shaft relative to the axis of rotation. The device also includes a pick tire or other feature on the hub on each side of the connection to move print media when the shaft rotates the hub. In another embodiment, a method for moving print media in a printer includes: applying a force to a sheet of print media at two locations spaced apart across the sheet; and, simultaneously with the act of applying, equalizing the force applied at the two locations.

Moving print media in a printer

A printer device includes a housing () that defines an interior space. A platform () includes a first position extending along a plane within the interior space for receiving media to be printed with fluid. A mechanism () selectively applies a force to the platform () to move the platform () to a second position at an angle relative to the plane.

Pivotable ink cartridge platform for printer device

Media stack compression with paddle

An apparatus for use as part of an inkjet printer to clear an ink drop stalagmite in the printer. In one embodiment the apparatus includes a clearing device coupled to an access door of the inkjet printer, wherein upon operation of the access door the clearing device at least partially clears the ink drop stalagmite.

Apparatus for clearing an ink drop stalagmite in an inkjet printer

A media feed mechanism includes a picking device, a first feedroller and a second feedroller. The picking device picks a sheet of media from a media source. The first feedroller moves the sheet of media along a feed media path. During a skew correction phase, the first feedroller rolls in a forward direction feeding the sheet of media forward and the second feedroller turns in a reverse direction preventing the sheet of media from progressing past a nip of the second feedroller. This results in skew correction. After skew correction is performed, the second feedroller turns in the forward direction advancing the sheet of media for printing.

Skew correction for a media feed mechanism

An inkjet printer having functionality to adaptively control an amount of force applied to a servicing sled used to clean an inkjet printhead. In selecting a run force to be applied to the servicing sled, a test force is applied to the servicing sled to determine if the servicing sled will move a predetermined distance under the test force.

Printing apparatus with adaptive servicing sled control and method

A multi-purpose, transmissive paper sensor includes a light beam projector and light detector having an analog output signal. Changes in the output signal from an open loop condition indicate the presences of at least one print medium being in the field-of-view of the sensor. Output signals indicative of print media leading edge, trailing edge, and number of sheets interrupting the light beam provide improved print media transport control for hard copy apparatus.

Method and apparatus for print media detection

An ink jet printing system with a pen body having a first chamber and a second chamber. A print head on the pen body is connected to the second chamber, and an ink-transmissive barrier separates the second chamber from the first chamber. A pump is connected to the pen body in communication with the first chamber, and operates to generate a positive pressure in the first chamber to motivate ink from the first chamber, through the barrier, and into the second chamber. An ink supply cartridge may be provided that removably connects to the pen body, and which has openings in registration with corresponding openings in the pen body into the first and second chambers, respectively. A sliding shutter or other valve may be provided on each of the pen body and the cartridge to close the openings when the cartridge is removed from the pen body. An actuator portion of the cartridge may operate to engage the pump upon installation of the cartridge, and to displace any gas bubble from the second chamber to the supply cartridge; upon disengagement of the cartridge, the actuator may release the pump, drawing ink from the cartridge into the first chamber.

Ink jet printing apparatus with air purge function

A sheet media handling system is provided for use in supporting a sheet ejected from a wet-ink hard copy apparatus output port while ink on a preceding sheet ink an output tray is allowed time to dry before depositing the succeeding on top thereof. The system employs a pair of guides having an elongate channel therebetween which receives a predetermined side edge of an ejected sheet. The channel bends the sheet in order to stiffen the sheet along its longitudinal axis such that only one edge need be supported. Once a trailing edge of an advancing sheet is ejected from the output port, a lower guide is retracted whereby the sheet falls under the force of gravity onto the output media stack in the output tray. Several advantageous lower guide upper surface constructs are disclosed. The advantages of the use of a guide mechanism on each side of the advancing output sheets is discussed.

Wet-print cut-sheet media handling system

A second feed roller of smaller diameter than a first feed roller is included in a media handling system. A print zone is located adjacent to the second feed roller away from the first feed roller to lower the location of the print zone. During ejection, a pivot mechanism moves from a first position adjacent to the printhead to an intermediary position. This causes arms to extend and rails to retract. The motions then pause and/or reverse, prior to full extension and full retraction. Next, the pivot mechanism moves to a second position causing the arms to fully extend and the rails to fully retract. The varied motion (e.g., pause and/or reversal) assures that the arms push at an edge of the media sheet to reliably move a media sheet into an output tray without the media sheet sailing from the printer.

Print media handling and ejection system

Growing community of inventors

Vancouver, WA, United States of America

Kieran B Kelly