Gated electron emitters are fabricated by processes in which charged particles are passed through a track layer (24, 48, or 144) to form charged-particle tracks (26.sub.1, 50.sub.1, or 146.sub.1). The track layer is etched along the tracks to create open spaces (28.sub.1, 52.sub.1, or 148.sub.1). Electron-emissive elements (30 or 142D) can then be formed at locations respectively centered on the open spaces after which a patterned gate layer (34B, 40B, or 158C) is provided. Alternatively, the op...

A leak detection system for gas, steam or the like in a plant yard includes a plurality of sampling modules and wind direction and velocity indicators both arranged around apparatus or equipment in the plant yard. Samples of the atmosphere around the apparatus or equipment are drawn through the sampling modules, and the concentration of a substance leaked into the atmosphere is detected by a sensor module. At the same time, the direction and velocity of wind in the plant yard are determined. Lea...

A picture display method and apparatus in which a light source is lengthened in service life and optimum color reproduction is realized, while the light utilization efficiency is improved to reduce the power consumption and the size of the apparatus. The red, green and blue illuminating light beams radiated from the light-emitting diodes 12R, 12G and 12R, are illuminated via relay lenses and field lenses on picture display light valves 11R, 11G and 11B and spatially modulated in intensity so as ...

The method of and means for the production of markers for the cutting of fabric or material in the garment or allied industries comprising forming a latent electroscopic image pattern on the surface of a dielectric master and toning the image with a primary toner and transferring the primary image toner to a conductive receiving member and fixing and then toning the fixed image with a secondary toner and transferring optionally to the fabric or material or to multiple copy members for marking fa...

An optical-fiber detection device which involves testing for correct operation is provided with at least one sensor having a sensing element which operates by light reflection at the end of an optical fiber and with a line for transmission of light by optical fibers. The transmission line connects the sensor to a source of periodic light pulses and to an electronic signal detection and processing unit. The sensor includes an optical fiber segment of predetermined length between the sensing eleme...

A system for manufacturing a stack the manufacture of which involves pressing/clamping and curing where improved productivity is imparted to that system by improving upon a stack transfer system. The manufacturing system comprises a press machine 1 for pressing/clamping a stack and for unclamping the stack; a curing chamber 20 for curing the stack pressed/clamped; and first and second transfer device connecting said press machine and the curing chamber, the first transfer device being in charge ...

A method of rendering a surface of substrate photoconduction comprising applying to the substrate a layer of N-vinyl carbazole and a prepolymer formed thereupon and completely polymerizing the monomer or prepolymer in situ on the substrate.

A toner image is formed on a photosensitive member by going through an electrophotographic process including charging, an original image exposure, and developing. The toner image on the photosensitive member is then transferred onto an image retention medium. Thus transferred toner image is temporarily fixed to the image retention medium by the application of heat, thereby enabling to make multiple copies by applying ink to the fixed toner image to form an ink image and bringing a copy paper in ...

The present invention aims at improvement in the image forming method, wherein ion current is modulated in an image form, on the basis of which a secondary electrostatic latent image is formed on a recording sheet, an insulated drum, and other recording media, and the thus formed electrostatic latent image is developed. In more detail, the entire region of such sheet and drum where such secondary electrostatic latent image is formed is uniformly charged beforehand to a desired potential, whereby...

An imaging method capable of producing high-resolution full color images on substrates such as flexible plastics sheets to form weatherable signs for exterior display, the method comprising: (a) providing a plurality of carrier sheets, each comprising a flexible base material having on one surface thereof a strippable resin layer; (b) imaging each carrier sheet by passage through an electrophotographic copying apparatus so that a toner image corresponding to a section of a desired image is depos...