Rca Inc.

Thomson Consumer Electronics Inc.

Delsys Pharmaceutical Corporation

Rca Thomson Licensing Corp.

Other

Sarnoff Corporation

Thomson Multimedia S.a.

Eugene Samuel Poliniak

Pabitra Datta

Nitin V Desai

Bawa Singh

Nitin Vithalbhai Desai

Peter M Ritt

Dominic Stephen Rosati

David A Keller

Harry R Stork

Brian Thomas Collins

Peter John Zanzucchi

William Ronald Roach

Ronald N Friel

Howard Christopher Rivenburg

Richard Joseph Himics

Peter David Southgate

Nalin Kumar

Lawrence Harrison Hammer

Hoi Cheong Sun

Nitin V DeSai

Vladimir Sinisa Ban

Aaron W Levine

Richard LaPeruta, Jr

Hoi Cheong Steve Sun

Mohamed Emam Labib

Timothy Allen Pletcher

James Regis Matey

George H Riddle

Thomas R Pampalone

John J Moscony

Wilber Clarence Stewart

John Paul Furda

Charles M Wetzel

Edward Richard Garrity, Jr

George M Ehemann, Jr

Suggy S Chrai

Dietrich Meyerhofer

Dennis Ronald McCarthy

Robert E Simms

Ramaswamy Murari

Michael Kaplan

Carl C Steinmetz

Bogdan Brycki

Henry Wielicki

Donald Chester Pultorak

Howard G Scheible

Sandra K McClelland

John Thomas McGinn

Mortaza Kashef

John Fech, Jr

Hoi Cheong (Steve) Sun

Wen Ho

Prince Lal

The invention is directed to a corona charging device having a powder feed with an outlet. The device has an internal charging cavity having an inlet and a charged powder outlet. The powder feed outlet is positioned at the internal charging cavity inlet. The device is adapted to guide a powder stream downstream from the powder feed outlet to the charged powder outlet. The device also includes a corona charger having one or more needle projections (each having a tip) positioned and adapted to facilitate a corona ion flow from the needle projections and intersecting the powder stream. The device also includes a rotating ground electrode adapted to be charged or grounded to attract the corona flow from the needle projections, and to rotate segments of the ground electrode between the internal charging cavity and a ground electrode cleaner.

Corona charging device and methods

Methods using dry powder deposition apparatuses

A substrate is roboticaly picked up at a station and transported to a measuring station to measure the distance to a reference. The substrate is aligned to a robot before measurement. The measured substrate is then transported to a pharmaceutical or diagnostic powder/grain deposition station where the powder/grains are controllably deposited on the substrate to predetermined thicknesses over a plurality of powder/grain collection zones. The deposited powder/grains are then measured to determine the thickness and area covered by the deposited powder/grains at each collection zone. The substrate is then transported to a lamination station and each collection zone of powder/grains is welded to a cover substrate. The system remembers which collection zones are out of specification so that they can be later selectively discarded.

Pharmaceutical product

AC waveforms biasing of bead transporter chucks and their accumulated charge sensing circuits tailored for low resistivity substrates and beads where if traditional DC quasi-static biasing potentials were used, the bead attraction potentials of the chuck would undergo rapid RC decay and cause the bead transporter chuck to stop working. Methods for selecting AC waveforms are given, including those that maximize the time average of the bead attraction potential at the bead collection zone of the bead contact surface.

AC waveforms biasing for bead manipulating chucks

A method for developing an electrostatic latent charge image formed on a photoreceptor,which is disposed on an interior surface of a faceplate panel,of a CRT,utilizes a developer,having a developing chamber,with a sidewall,closed by a bottom end,and a panel support,at the other end. An opening,is formed through the panel support,to provide access to and support for the faceplate panel,. A panel grid,is disposed in proximity to said interior surface of said faceplate panel,and operated at a first potential to control the electric field from the latent charge image. A tank grid,is disposed within said developer,and spaced from the sidewall,, the bottom,and the panel grid,. A triboelectric gun,is disposed within the developer,for imparting a desired charge polarity to the screen structure material and for distributing the charged screen structure material onto the latent charge image. An electrometer,and a phosphor deposition monitor,monitor the deposition of the charged screen structure material onto the latent charge image; and a controller,terminates the deposition of the charged screen structure material when sufficient material is deposited. The Tank grid,is operated at a potential different from the potential on the panel grid,so that the tank grid,controls the electrostatic forces within the developer

Method of developing a latent charge image

Provided is, among other things, a dry deposition apparatus for depositing grains on a substrate comprising:

Dry powder deposition apparatus

A spray module 40 for manufacturing a cathode-ray tube (CRT) 10 comprises an enclosure 42 having sidewalls 44, a base 46 attached to the sidewalls 44, for closing one end thereof, and a panel support 48 having an opening, 50 therethrough. The panel support 48 is attached to an opposite end of the sidewalls 44. The spray module 40 has at least one electrostatic spray gun 36 therein for spraying charged screen structure material through the opening 50 in the panel support 48 and onto an interior surface of a faceplate panel 12 of the CRT 10. The spray module 40 includes a primary shield assembly 55 disposed within the enclosure 42 and extending through the opening 50 in the panel support 48. A secondary shield assembly 56 also is disposed within the enclosure 42 The primary and secondary shield assemblies 55 and 56, respectively, direct the charged screen structure material toward the interior surface of the panel 12, thereby increasing the transfer efficiency of the spray gun 36. A collecting tray 54 also is utilized to catch the spent spray which falls to the bottom of the spray module 40. The tray 54 is inclined toward a drain 100 that directs the spent material out of the spray module 40.

Spray module having shielding means and collecting means

A method and apparatus for forming an insulator 62 on one major surface of a uniaxial tension focus mask 25 includes the steps of: positioning a mask sheet 27, having a multiplicity of openings 42 that extend from a first major surface of the mask sheet through a main body portion thereof to an oppositely disposed second major surface, at a distance from a charging gun 72, 172 having a source 74, 174 of a dry-powdered insulative material; charging and directing the dry-powdered insulative material toward the first major surface of the mask to provide a coating of the charged, dry-powdered insulative material thereon, and providing means 70, 272 for preventing the charged, dry-powdered insulative material from extending into the openings 42 and being deposited onto the main body portion of the mask surrounding the openings and the second major surface. The mask sheet 27, with the charged, dry-powdered insulative material on the first major surface thereof, is then heated to a temperature sufficient to sinter the insulative material. An apparatus for practicing this method also is described.

Method and apparatus for forming an insulator on a uniaxial tension

In accordance with the present invention, a method of electro-photographically manufacturing a luminescent screen assembly on an interior surface of a faceplate panel 12 for a color CRT 10 includes the steps of coating the interior surface of the faceplate panel with a volatilizable, organic conductive solution to form an organic conductive (OC) layer 32, and overcoating the OC layer with a volatilizable, organic photoconductive solution to form an organic photoconductive (OPC) layer 34. The step of overcoating the OC layer to form the OPC layer is improved by the substeps of: grounding the OC layer; providing an organic photoconductive (OPC) solution comprising a resin, an electron donor material and electron acceptor material, and a suitable solvent; and spraying electrostatically-charged droplets of the OPC solution onto the OC layer, with at least one electrostatic spray gun 47, to provide an OPC layer, having uniform thickness, overlying the OC layer.

CRT electrophotographic screening method using an organic

A method of manufacturing a luminescent screen assembly on an interior surface of a faceplate panel 12 for a color CRT 10 includes the steps of uniformly applying a solution of a material to form an organic conductive (OC) layer and overcoating the OC layer with a solution to form an organic photoconductive (OPC) layer, on the interior surface of the faceplate panel. The OPC layer 34 is conditioned by directing a stream of dry gas thereon to warm the OPC layer to a preheat temperature, while maintaining the panel at a panel temperature less than the preheat temperature. The OPC layer is exposed to IR radiation to rapidly increase the temperature of the OPC layer to a curing temperature, greater than the preheat temperature, to remove some of the volatilizable constituents from the OPC layer, without substantially increasing the temperature of the panel. The OPC layer is then cooled by directing at least one stream of cool gas onto the surface thereof, to lower the temperature of the OPC layer to a subsequent processing temperature.

Method of manufacturing a luminescent screen for a CRT by conditioning a

In accordance with the present invention, an apparatus for developing a latent image formed on a photoreceptor, which is deposited on an interior surface of an output window of a display device, is disclosed. The developing apparatus includes a developing chamber, having a support surface for supporting the output window, a screen structure material reservoir for storing, deagglomerating and feeding the screen structure material, and a triboelectric gun assembly communicating with the reservoir. The gun assembly triboelectric charges and imparts a desired charge polarity to the screen structure material. The gun assembly further includes at least one material dispersing nozzle spaced from the support surface for distributing the charged material for deposition onto the latent image.

CRT developing apparatus

In accordance with the present invention, a method of electrophotographically manufacturing a luminescent screen assembly for a color CRT 10 on an interior surface of a faceplate panel 12 is described. A volatilizable organic conductive (OC) layer 32 is provided on the interior surface of the panel and a volatilizable organic photoconductive (OPC) layer 34 overlies the OC layer 32. The method includes the steps of: establishing a substantially uniform electrostatic charge on the OPC layer; exposing selected areas of the OPC layer to visible light to affect the charge thereon; developing the selected areas of the OPC layer with a triboelectrically charged, dry-powdered, first color-emitting phosphor; sequentially repeating the charging, exposing and developing sequence for triboelectrically charged, dry-powdered, second and third color-emitting phosphors to form a luminescent screen comprising picture elements of triads of color-emitting phosphors; fixing the phosphors to the underlying OPC layer with a suitable fixative; filming the phosphors; and aluminizing the filmed phosphors. The present method is an improvement over prior methods because the fixing step utilizes an electrostatic spray to uniformly contact the phosphors and the underlying OPC layer with the fixative, without moving the phosphors.

Method of manufacturing a luminescent screen for a CRT

The method of electrophotographically manufacturing a screen assembly on an interior surface of a faceplate panel for a color CRT, according to the present invention includes the step of forming a photoreceptor by sequentially coating the surface of the panel with a conductive solution to form a volatilizable conductive layer and then overcoating the conductive layer with an organic photoconductive solution comprising a suitable resin, an electron donor material, an electron acceptor material, a surfactant and an organic solvent to form a volatilizable photoconductive layer. The photoconductive layer of the photoreceptor is resistant to cracking during filming, displays increased phosphor adherence during fixing, can be substantially completely baked-out, and has substantially no spectral sensitivity beyond 550 nm so that the screening process may be carried out in yellow light, rather than in the dark, in order to provide a safe working environment without deleterious effects on the panels coated with the novel photoconductive layer.

Organic photoconductor for an electrophotographic screening process for

Growing community of inventors

Willingboro, NJ, United States of America

Eugene Samuel Poliniak