SAMUEL PEARLMAN
Engineers in Lancaster, PA

2004006, Apr 8, 2004

Aug 1, 2003

10/632289

Samuel Pearlman - Lancaster PA, US
Robert Kreider - Lancaster PA, US
Richard LaPerita - Lititz PA, US

H01J009/20

430/025000, 430/024000

A method of manufacturing a luminescent screen assembly, having a light-absorbing matrix with a plurality of substantially equally-sized openings therein, on an inner surface of a faceplate panel of a cathode-ray tube (CRT) is provided. The method include the steps of exposing a first photoresist layer to light from a light source, located relative to a central source position, as well as two symmetrical source positions located relative to the central source position. Thereafter, a second photoresist layer and a third photoresist layer are sequentially exposed to define second guardbands of light-absorbing material and third guardbands of light-absorbing material, respectively. However, the light source positions for the second photoresist layer and the third photoresist layer are located at asymmetric positions relative to the central source position.

5744270, Apr 28, 1998

Mar 18, 1996

8/620741

Samuel Pearlman - Lancaster PA
Robert Anthony Duschl - Lititz PA
Anthony Stanley Baran - Lancaster PA
Glenn William Brunner - Landisville PA
George Simon Gadbois - Lancaster PA
Frank Thomas DiAugustine - Lancaster PA

Thomson Consumer Electronics, Inc. - Indianapolis IN

G03B 4100, G03C 500

430 25

The novel method for producing a coded marking on a CRT faceplate panel having an exterior and an interior surface with a viewing area surrounded by a periphery and having a luminescent screen with a plurality of different light-emitting phosphors separated by light-absorbing material includes the steps of: depositing a suitable photoresist on the interior surface of the panel to form a layer that extends across the viewing area and onto the periphery; illuminating areas of the photoresist on both the viewing area and the periphery with actinic radiation to selectively change the solubility of the photoresist; developing the photoresist to remove the more soluble areas, thereby exposing underlying portions of the interior surface of the panel while leaving retained areas of less soluble photoresist. The retained areas of the photoresist and the exposed portions of the interior surface of the panel are then overcoated with a light-absorbing material which is dried to form a coating. The light-absorbing coating is developed by removing the retained areas of the photoresist having the overlying light-absorbing coating thereon, while leaving the coating of light-absorbing material adhered to the exposed portions of the interior surface of the panel.

4234669, Nov 18, 1980

Mar 27, 1979

6/024391

Samuel Pearlman - Lancaster PA

RCA Corporation - New York NY

G03C 500

430 25

A method for preparing a screen structure for a cathode-ray tube comprising (a) exposing a water-soluble photopolymeric film on a surface to a light image to insolubilize selected portions of the film, (b) flushing the exposed film with an aqueous medium that is free from borate ions to remove only the still-soluble portions of the film, thereby producing a stencil on the surface, (c) rinsing the stencil with an aqueous solution containing borate ions to prevent further removal of material from said stencil, (d) then overcoating the stencil and the surface not covered by the stencil with pigment particles, (e) and then removing only the stencil and the overcoating thereon.

2003005, Mar 27, 2003

Sep 25, 2001

09/962520

Samuel Pearlman - Lancaster PA, US
Robert Kreider - Lancaster PA, US
Richard LaPeruta - Lititz PA, US

H01J009/20

430/025000, 430/024000, 430/026000

A method of manufacturing a luminescent screen assembly, having a light-absorbing matrix with a plurality of substantially equally-sized openings therein, on an inner surface of a faceplate panel of a cathode-ray tube (CRT) is provided. The tube has a color selection electrode spaced from the inner surface of the faceplate panel in which the color selection electrode has a plurality of strands interleaved with slots. The method includes the steps of providing a first photoresist layer, whose solubility is altered when exposed to light, such that greater dosages of light reduce the solubility thereof. The first photoresist layer is applied to the inner surface of the faceplate panel. The first photoresist layer is exposed to light from a light source, located relative to a central source position, as well as two symmetrical source positions relative to the central source position. The exposure selectively alters the solubility of the illuminated areas of the first photoresist layer to produce therein regions with greater solubility and regions of lesser solubility. The regions of greater solubility are subsequently removed to uncover areas of the inner surface of the faceplate panel, while retaining the regions of lesser solubility. The inner surface of the faceplate panel and the retained regions are then overcoated with a light-absorbing material. Thereafter, the retained regions of the first photoresist layer and the light-absorbing material thereon are removed, uncovering portions of the faceplate panel and defining first guardbands of light-absorbing material on the inner surface of the faceplate panel. This photolithographic process is repeated with a second photoresist layer and a third photoresist layer to define second guardbands of light-absorbing material and third guardbands of light-absorbing material, respectively. However, the light source positions for the second photoresist layer and the third photoresist layer are located at asymmetric positions relative to the central source position.

6037086, Mar 14, 2000

Jun 16, 1998

9/097390

Istvan Gorog - Lancaster PA
Richard LaPeruta - Lititz PA
Samuel Pearlman - Lancaster PA
Nitin Vithalbher Desai - Princeton Junction NJ
Wilber Clarence Stewart - Hightstown NJ
Gregory James Cohee - Newtown PA
Richard William Nosker - Princeton NJ
Pabitra Datta - late of Cranbury NJ
Danielle Helene Herford - Etters PA

Thomson Consumer Electronics, Inc., - Indianapolis IN

G03G 1310

430 25

A light-absorbing matrix 23, having openings therein, is formed on an interior surface of a faceplate panel 12 of a cathode-ray tube 10 by providing a photoreceptor thereon, electrostatically charging the photoreceptor 72 to a substantially uniform level of charge, and exposing the photoreceptor to light through openings 33 in a color selection electrode 24 to selectively discharge the more intensely illuminated areas of the photoreceptor, without substantially discharging the less intensely illuminated areas. The photoreceptor 72 comprises a plurality of layers including a photoresist layer 56, a conductive layer 62, and a photoconductive layer 66. The openings 33 in the color selection electrode 24 have a dimension substantially greater than the dimension of the openings in the resultant matrix 23. The photoreceptor 72 is contacted with a liquid toner having charged pigment particles which form toner lines 84 on the less intensely illuminated areas of the photoreceptor. The photoreceptor 72 is exposed to UV radiation to selectively change the solubility of the photoresist portion 56 thereof into areas of greater and lesser solubility.

4749385, Jun 7, 1988

Mar 27, 1987

7/030638

Glenn W. Brunner - Landisville PA
Samuel Pearlman - Lancaster PA
Randall E. McCoy - Willingboro NJ
Jordan R. Nelson - Pennington NJ

RCA Licensing Corporation - Princeton NJ

B01D 4610

55 97

A method of providing clean air to a workpiece comprises positioning the workpiece adjacent to a first opening in a conduit. The conduit includes a central segment and a peripheral segment having, respectively, the first opening and a second opening disposed at opposite ends of the conduit. The peripheral segment surrounds the central segment such that the first opening is substantially coplanar with the second opening. A laminar flow of air is created through the conduit in a direction away from the second opening and toward the first opening. The air flow is filtered through a HEPA filter supported within the conduit.