Xerox Corporation

Robert G Martin

Fred W Schmidlin

Steven B Bolte

Richard F Koehler, Jr

Edward W Connors

Grace T Brewington

Paul C Julien

Michael G Swales

Alan M Litman

Raymond W Stover

Paul C Swanton

Stephen F Royka

Theodore Davidson

Apparatus for creating powder images. An image forming member and a toner delivery system are supported opposite each other. The images are formed by the image forming member along a first direction. The toner delivery system includes a toner transport for moving toner particles from a supply to a zone opposite the image forming member. The transport moves along a second direction which is non-parallel to the first direction.

Toner ribbon development cassette

A toner delivery method and apparatus for delivering highly charged toner containing a minimum of wrong sign toner to a donor roll structure. The donor roll structure, in turn, delivers the toner to an image receiver or a DEP printhead structure. A magnetic brush is utilized for loading toner particles on the donor roll structure. A magnetic cleaning brush is provided for redistributing unused toner on the donor roll structure. The donor roll and magnetic brushes are positioned to form a cavity which is filled with developer material which prevents the formation of carrier bead chains.

Low bead impulse donor loading

Direct Electrostatic Printer including a combination toner charging and delivery system. The combination toner charging and delivery system serves to convey well charged toner to an area adjacent an apertured printhead through which toner particles are propelled in image configuration. The system is provided with an annular channel in a generally cylindrical member through which toner laden air moves under pressure. During movement uncharged toner particles collide with a triboactive surface of the channel due to centrifugal force and become charged. The other surface delineating the channel carries a bias electrode thereon. The electrostatic field created by the bias prevents toner from colliding with the triboactive surface once it has reached a predetermined charge/mass ratio.

Cyclonic toner charging donor

Direct electrostatic printing apparatus including structure for delivering developer/toner particles to a printhead forming an integral part of the printing device. The developer/toner delivery system insures even distribution to an apertured printhead structure. To this end, toner is deposited on a donor belt using a magnetic brush structure. The belt is entrained about a drive roller and an idler roller as well as a stationary mandrel. The mandrel is positioned opposite the printhead structure with a portion of the belt disposed intermediate thereof. The mandrel is provide with a flat area which is coplanar with the printhead structure. The flat area is coextensive with the space occupied a plurality rows of apertures in the printhead to thereby provide a uniform spacing between each row of apertures and the toner delivery belt.

Belt donor for direct electrostatic printing

A fusing apparatus including a heater roll disposed transverse the direction of movement of the support material, the heater roll being stiff in the longitudinal direction and conforming in the hoop direction, a core supporting the heater roll, the heater roll being disposed about the circumference of the core, the core being conforming in the hoop direction, and a back up role disposed transverse the direction of movement of the support material, the back up role being stiff in the longitudinal direction and conforming in the hoop direction, the engagement of the heater role and the back up role defining an elongated, essentially flat nip.

Conformable fusing system

An instant-on fuser having a cylindrical, relatively thin fiber wound cylinder supporting a resistance wire, heating foil, or printed circuit secured on the outside surface of the cylinder or embedded to the surface of the cylinder. The interior of the cylindrical tube is filled with air, and the wire, heating foil or printed circuit is connected to electrical leads extending through caps on the ends of the cylindrical support. The fuser is fabricated from the cylinder outward to the final step of applying a release agent on the outer surface.

Filament wound foil fusing system

The invention is a single component development system including a housing with a sump containing a supply of toner, an ultrasonic transducer having one end extending into the source of the toner and the other end disposed adjacent a photoreceptor, and a current source electrically connected to the ultrasonic transducer to charge the toner and move the toner from the sump to the photoreceptor.

Ultrasonics traveling wave for toner transport

An apparatus for charging insulating toner particles which comprises a charging roll, a transporting roll or donor belt, and a squirrel cage toner delivery device. A charging nip is situated between the charging roll and the transporting roll or donor belt, and the transporting roll or donor belt and the charging roll are charged to a predetermined potential. The rotating biased wire device in the form of a squirrel cage delivers toner particles from the toner housing to the charging nip. Subsequent to charging, the toner particles are delivered by the transporting roll or donor belt to the photoreceptor.

Single component development system with biased squirrel cage for

This invention is generally directed to an apparatus for charging toner particles comprised in operative relationship of a means for charging insulating toner particles and a means for transporting insulating toner particles, said means for charging and said means for transporting being charged to a predetermined potential, which apparatus further includes therein a brush device for delivering toner particles to a charging nip situated between the means for charging the toner particles and the means for transporting the toner particles. The brush device can also function as a charging source for the toner particles, and as a cleaning system. More specifically in one embodiment the present invention is directed to an apparatus for simultaneously metering, charging and transporting non-magnetic insulating toner particles comprising in operative relationship a metering roll means, an optional trim blade means for said metering roll means, a toner supply reservoir means containing therein weakly charged insulating toner particles possessing about an equal number of positive and negative charges thereon, a transporting hard roll or donor belt means, a triboelectrically active coating contained on said transporting means, a drive roll means, an idler means, a tensioning means, an imaging means, a voltage source means for the metering roll means, a voltage source means for the drive roll means, and the transporting means, said metering roll means moving in a direction opposite to the direction of movement of the transporting means, and wherein the apparatus further includes a moving brush means contained in the toner supply reservoir which brush means contains bristles thereon, wherein the brush transports toner particles to a charging nip situated between the metering roll means and the transporting means.

Apparatus for charging toner particles

The present invention is concerned with an instant-on fuser having a cylindrical, relatively thin metal cylinder supporting a resistance heating foil or printed circuit secured on the inside surface of the cylinder by a high temperature adhesive. The interior of the cylindrical tube is filled with air. The heating foil or printed circuit is carried on a fiber glass substrate and the heating elements is connected to electrical leads extending through caps on the ends of the cylindrical support. The relatively low thickness, low mass fuser and high temperature materials permit a relatively fast instant-on fuser.

Instant-on fuser

A printing machine having an operator removable housing comprising a photoconductive member with a web entrained about a portion thereof. A latent image is recorded on the photoconductive member and marking particles transported to the portion of the web entrained about the photoconductive member. In this way, the latent image recorded on the photoconductive member attracts the marking particles to the web in image configuration. A copy sheet is advanced into contact with the marking particles on the web. The marking particles interposed between the web and the copy sheet are heated. After cooling, the copy sheet is separated from the web with the marking particles remaining affixed thereto.

Printing machine employing an operator replaceable interposition web and

Permanent, meaningful information is so associated with removable, confusing information, at least some of which is usually similar in character to said permanent, meaningful information, as to make it effectively impossible for an observer to discriminate between the two types of information even though both types of information in the association may be legible. Such a system is advantageously used in instructional systems and particularly in responsive answer formats.

Growing community of inventors

Rochester, NY, United States of America

Robert G Martin