Nexpress Solutions, Inc.

Jorge Luis Chavez

Graham S Wright

Adolf Phillip Greiner

Ralph E Williams

Joseph L Baker

Vidanand P Chand

A method and apparatus for conditioning a moving transport web for neutralizing or modifying polar charge density and net charge density on the moving transport web included, for example, in an electrostatographic printer. The web conditioning includes a charging station which has a first stage including two open-wire AC corona chargers facing one another across the transport web, and downstream, a second stage including two gridded AC corona chargers facing one another across the transport web. The grids of the gridded AC corona chargers are preferably grounded, the AC waveforms for energizing the corona wires of the open-wire chargers and the gridded chargers are preferably quasi trapezoidal with no applied DC offsets, with preferably preselected asymmetries in the spacings from the web in the first and second stages. The first stage accomplishes at least about 80% of said neutralizing of said polar charge density.

Web conditioning charging station

A charging device assembly used within a reprographic machine having a hollow shell containing the charging device, an attachment mechanism that retains the charging device relative to the hollow shell in a predetermined position, a pair of end covers at either end of the hollow shell and an electrical connector on the shell coupled to the charging device. The hollow shell can be conductive or insulative and is formed with features that facilitate easy mounting and removing of the elements of the charging device assembly.

Corona chargers having consumer replaceable components

A multi-element gudgeon assembly including (a) a sleeve element having a central bore of substantially uniform diameter, such bore being adapted to receive one end of a rotatable axle; (b) a circular flange element having a central collar portion slidably mounted on the outer surface of the cylindrical sleeve element, and having an outer rim portion adapted to engage, center and support an end of a cylindrical drum for rotation with axle; and (c) a stub axle element mounted on one end of the sleeve element and cooperating with structure on the outer surface of the sleeve element to position the flange element at a fixed desired location on the sleeve element.

Gudgeon assembly

Apparatus is provided for facilitating the loading of a hollow cylindrical drum, for example, an image-recording drum in an electrostatographic printer or the like, onto a rotatably driven drum axle having a free end extending outwardly in a cantilever manner from a support frame and having a longitudinally-extending axis of rotation. According to a preferred embodiment, such apparatus generally comprises a plurality of slide mechanisms disposed at equal distances from each other and from the intended axis of drum rotation. Each of the slide mechanisms comprises a pair of elongated slide members extending parallel to said axis of rotation, one of the slide members of each of each pair being rigidly supported by said drum axle, and the other slide members of each pair being slidably mounted on the rigidly supported slide members for movement parallel to the drum axis. The slidably mounted slide members are operable to collectively support the drum from within for axial movement between a drum-loading position axially spaced from the drum axle and a loaded position atop the drum axle.

Growing community of inventors

Rochester, NY, United States of America

Jorge Luis Chavez