Hewlett-packard Development Company, L.p.

Hewlett-packard Company

Glenn W Gaarder

Kevin Lee Bokelman

Ryan M Smith

Mark Randolph Marrs

William Wistar Rhoads

Samuel A Stodder

Kevin Bokelman

Jeffrey E Jones

Otto Kenneth Sievert

Chan K Nguyen

Daniel Scott Weinstein

Edward Anthony Hill

Stephen B Witte

Michael Gustafson

Michael Janczyk

Dan Scott Caputo

Thomas T Frankie

Allan Donley

Lynn D Palmer

Reza Movaghar

An apparatus for lowering and raising a pick arm is disclosed herein. An example of the apparatus includes a shuttle assembly having a first direction of movement and a second direction of movement, and a lift assembly rotatably coupled to the shuttle assembly. The apparatus additionally includes a cam coupled to the lift assembly to transform rotary motion of the lift assembly into substantially linear motion that allows the pick arm to lower as a result of movement of the shuttle assembly in the first direction and that raises the pick arm as a result of movement of the shuttle assembly in the second direction. Other components and attributes of the apparatus are also disclosed herein, as are additionally examples of the apparatus. A method of lowering and raising the pick arm is further disclosed herein.

Apparatus for lowering and raising a pick arm

Image scan device, comprising a platen, and a carriage, the carriage comprising a scan head, and a support structure arranged to move the scan head with respect to the platen, wherein a resilient element is provided that is arranged to bias the scan head in the direction of the platen, and resilient element fully extends between the platen and the bottom of the carriage, as seen from a direction parallel to the platen.

Image scan device

An over-center mechanism includes a pivoting member, rotatable about a pivot point between first and second positions, a drive gear, having a first radius, fixedly attached to the pivoting member at the pivot point, a pinion gear, engaged with the drive gear, having a second radius, and an over-center tension spring, eccentrically attached between the drive gear and the pinion gear, to bias the pivoting member toward the first and second positions.

Over-center mechanism

In one implementation, a method scans a media to provide a first image and a second image. The method further subtracts the first image from the second image.

Scanning two images of media

Various embodiments of a system and method for picking print media are disclosed.

Media pick system and method

Various methods and apparatus relating to a media interaction device drive system having at least one reduced dimension are disclosed.

Media interaction device drive system

A sheet feeder has a tray for receiving one or more media sheets. An arm is configured to pivot relative to the tray. A roller is rotatably coupled to the arm. A biasing device is coupled to the arm. The biasing device biases the arm to pivot toward the tray.

Sheet feeder

A sheet transfer apparatus includes a first roller, a second roller and a power train. The first roller is configured to be rotatably driven at a first surface speed. The second roller is spaced from the first roller such that the first roller and the second roller are configured to simultaneously engage a media sheet. The second roller is configured to be driven at a second surface speed greater than the first surface speed. The power train delivers power to the first roller to rotatably drive the first roller. The power train includes a first gear coupled to the first roller, a second gear and a third gear. The third gear is movable between a first position in which the third gear is in power transmitting engagement with both the first gear and the second gear and a second position in which the third gear is out of power transmitting engagement with the second gear.

Sheet transfer apparatus

Embodiments of device and methods for winding media are illustrated and described.

Winding media

One embodiment of a mechanism may include a member having a first axis and a surface non-concentric with said first axis, a first gear rotatably mounted on said member at a second axis different from said first axis, and a device coupled to either of said member or said first gear to rotate said member when said first gear rotates about said second axis.

Rotating member

A replaceable roller bogie for a single sheet feeder includes pre-feed and separation rollers mounted on a frame which also has a frame positioning lever thereon. Roller drive gears are mounted between spaced plates on the frame and include a pre-feed roller clutch gear with elastomeric teeth which is mounted in slots on the frame which limit motion travel of the clutch gear to prevent over engagement of gear teeth on the clutch gear with gear teeth on the pre-feed roller drive gear. The replaceable bogie is pivotally supported on the sheet feeder and held in place by a manually operable release and latch mechanism.

Replaceable roller bogie for document feeding apparatus

An optical scanner system wherein the central region of the light source is selectively covered up by a mechanically actuated shutter during a transparency scanning mode. By occluding the central portion of the light source, problems with flare and degraded image quality are eliminated. The shutter is actuated to its two positions (normal reflective mode position, transparency mode position) by pins, protrusions, or the scanner walls in the scan module path. When the scan module is driven to the extremes of its travel the shutter is either driven open or closed. A bracket structure is provided to hold the transparent media and a covering light reflective tent, and can include the pin or pins that can protrude into the scanner module path and thus actuate the shutter only when the structure is mounted on to the scanner by the user. The bracket structure can include a lower member that rests directly on the platen glass to align filmstrips, slides, and other transparent media. The tent structure is hinged relative to the lower structure which allows it to be opened and closed to enable insertion of transparent media. When the tent structure is closed it acts as the reflective light path to allow light from the primary light source to be reflected up, over, and down through the transparent media, and into the optical light path leading to the optical sensor.

Light source shutter for scanning transparent media through overhead reflective light path

A roller assembly for a single sheet feeder includes a stack damper which is rotatably suspended on or near a pre-feed roller axis to prevent buckling of thin media sheets and to impart a slight bend to thick media sheets during sheet movement by the pre-feed roller. The stack damper has a surface which extends from a location proximate the pre-feed roller parallel to the surface of a stack of media from which individual sheets are to be removed.

Growing community of inventors

Ramona, CA, United States of America

Glenn W Gaarder