Abstract: A solid state laser including a plurality of plate like lasable elements in an array on a common optical axis. There are two different plate like elements, arranged in an alternating pattern, each containing a lasing ion which lases at a wavelength that is different from the wavelength of the other. The lasing ions and host materials are chosen so that there are two distinct spectral regions in which the lasing output of one plate element is not strongly absorbed by the other plate element.

Abstract: A coating composition for imparting improved scuff resistance to a substrate and a process for its use are disclosed. The coating composition comprises an aqueous emulsion of polyethylene containing from about 0.5% to about 15% of a water-soluble polyethylene oxide by weight of the polyethylene emulsion. The preferred substrate is a paper product such as paper, paperboard and linerboard.

Abstract: A method for article coding using transparent indicia formed essentially of aluminum monohydrate. An article may be marked with a serial number or the like with a liquid material consisting essentially of aluminum monohydrate. When dried, the marking will be transparent. The marking will have a higher affinity for indicator solutions than will the substrate, and will therefore become visible when the article is sprayed or coated with such a solution. The article may be glass, metal, paper, wood or plastic. If the substrate material permits, heating to 300.degree. C. after coating with the indicator solution will destroy the indicator and render the marking or indicia transparent again.

Abstract: There is disclosed a gaseous laser, whose cathode is a conductive coating upon the walls of a cathode volume, the geometric design of the cathode, cathode volume, and cathode-connecting volume being such as to impede sputtering of the cathode.

Abstract: A method for the manufacture of plastic containers. In a first embodiment of the invention a tubular length of thermoplastic material is severed from an extruder and blown into a preform shape in a movable preform mold. After completion of the cycle, the preform mold opens and returns to the extruder for a new section of material. The preform shape remains in the location where it was formed. Return of the preform mold moves the previously completed preform shape into registry with a conditioning mold. At this location, it is grasped by an indexable neck clamp. After completion of the thermal conditioning provided by the conditioning mold, the preform shape is indexed to a final shape mold where it is given its final configuration. The completed container is then indexed to a removal station for ejection from the forming process.

Abstract: A method for measuring the thickness of transparent articles utilizing a plural component light beam. In the most general sense, the present invention involves the generation of a plural component light beam which is generally symmetric about the optic axis of the system. The light distribution which results from this arrangement is used to illuminate a transparent article. The result is separate reflections from the front and rear surfaces of the article for all of the components of the light beam. If these reflections are imaged in a detector plane which is conjugate to a plane in the vicinity of the article, a pair of co-planar images are formed, one image representing reflections of all of the plural components from the rear surface and the other image representing reflection of all of the plural components from the front surface. Measurement of the average separation of the images will give a value that is proportional to the thickness of the article at a point lying along the optic axis of the system.

Abstract: A sealing glass and a sealing glass paste for sealing the face plate and funnel portion of a color television tube wherein PbO-containing sealing glass frit contains from an effective amount of a powder, such as Pb.sub.3 O.sub.4 powder, which powder prevents the reduction of PbO to Pb metal during the sealing process, which reduction would otherwise result in a dielectric breakdown in the seal. A sealing glass paste consisting essentially of a PbO--B.sub.2 O.sub.3 --ZnO sealing glass frit and containing an effective amount of said powder, based upon the weight of the frit, together with hydroxypropyl cellulose binder for the frit and a solvent for the binder. A method for sealing the face plate of a color television tube to its funnel portion with a PbO-containing solder glass wherein the reduction of PbO to metallic lead during the sealing step is obviated by the addition of a sufficient amount of Pb.sub.3 O.sub.4 or BaO.sub.2 powder in the solder glass and paste made therewith, which Pb.sub.3 O.sub.

Abstract: An extrusion head and a method for controlling the concentricity of extruded tubular products. A die member has a generally spool shaped configuration with front and rear flanges connected by a hub. The die member has a bore extending completely through it in the hub area. A mandrel is inserted and held in the bore to define an annular space. The rear flange is rigidly connected to a source of molten material to be extruded. The material is introduced into the annular space and issues from the die as a tubular product. Connected to the front flange is a means for deflecting the front flange and the connecting means for deflecting the front flange and the connecting hub relative to the mandrel in order to correct out of concentric formation of the tubular article.

Abstract: An improved Q-switched laser and laser rod in which the threshold of double pulsing is significantly raised. In a Q-switched laser, the laser cavity includes a front mirror which is partially transmissive, a rear mirror element and a lasable rod like element positioned between the two mirrors. The rear mirror is controlled in such a manner that it sequentially presents reflective and nonreflective surfaces to the laser rod. This then prevents lasing action from occurring until such time as the reflective surface is presented to the rod. In order to prevent double pulsing, pulsing which occurs as the rear mirror is moving into its proper alignment, a pulse suppression optical discontinuity is provided within the laser cavity. This may take the form of a bevel portion on one end of the laser rod itself. The bevel portion is aligned such that it is positioned in the direction of opening of the rear mirror to the rod.

Abstract: An extruder apparatus control system wherein a temperature corresponding to that of the extrusion material is sensed at each of a series of zones extending along the apparatus extrusion chamber and also the velocity of the apparatus ram. The control system includes a command device for providing operating commands corresponding to a selected operating mode of the apparatus and a velocity command corresponding to a desired velocity of the ram for the selected operating mode. From these operating commands a controller establishes for a selected operating mode, a series of temperature set points, each corresponding to the desired temperature at one of the series of zones and from the velocity command, a velocity set point representing the desired velocity. Thereafter, the control system compares the set points with the sensed values and makes corrections as required to achieve and maintain an equality between them.

Abstract: There is disclosed a gaseous laser, whose cathode is a conductive coating upon the walls of a cathode volume, the geometric design of the cathode, cathode volume, and cathode-connecting volume being such as to impede sputtering of the cathode.

Abstract: A sealing glass and a sealing glass paste for sealing the face plate and funnel portion of a color television tube wherein PbO-containing sealing glass frit contains from an effective amount of a powder, such as Pb.sub.3 O.sub.4 powder, which powder prevents the reduction of PbO to Pb metal during the sealing process, which reduction would otherwise result in a dielectric breakdown in the seal. A sealing glass paste consisting essentially of a PbO-B.sub.2 O.sub.3 -ZnO sealing glass frit and containing an effective amount of said powder, based upon the weight of the frit, together with hydroxypropyl cellulose binder for the frit and a solvent for the binder. A method for sealing the face plate of a color television tube to its funnel portion with a PbO-containing solder glass wherein the reduction of PbO to metallic lead during the sealing step is obviated by the addition of a sufficient amount of Pb.sub.3 O.sub.4 or BaO.sub.2 powder in the solder glass and paste made therewith, which Pb.sub.3 O.sub.4 or BaO.

Abstract: A sealing glass and a sealing glass paste for sealing the face plate and funnel portion of a color television tube wherein PbO-containing sealing glass frit contains from an effective amount of a powder, such as Pb.sub.3 O.sub.4 powder, which powder prevents the reduction of PbO to Pb metal during the sealing process, which reduction would otherwise result in a dielectric breakdown in the seal. A sealing glass paste consisting essentially of a PbO-B.sub.2 O.sub.3 -ZnO sealing glass frit and containing an effective amount of said powder, based upon the weight of the frit, together with hydroxypropyl cellulose binder for the frit and a solvent for the binder. A method for sealing the face plate of a color television tube to its funnel portion with a PbO-containing solder glass wherein the reduction of PbO to metallic lead during the sealing step is obviated by the addition of a sufficient amount of Pb.sub.3 O.sub.4 or BaO.sub.2 powder in the solder glass and paste made therewith, which Pb.sub.3 O.sub.4 or BaO.

Abstract: A rimless face panel is mounted on a funnel-shadow mask color selection device subassembly for a color television picture tube construction by indexing means establishing a unique positional relationship between the face panel and the mask. Bosses are formed on the inner walls of the funnel to receive mask support brackets which engage spring arms of brackets attached to the mask for precise spacing of the mask from the seal edge of the funnel. In a first embodiment, tabs are provided on the spring arms for engaging slots in the face panel to establish the positional relationship between the face panel and the mask during lighthousing and sealing. In a second embodiment, the tabs are formed on the mask support brackets. In a third and a fourth embodiments, studs in the face panel engage elongated apertures in the mask support brackets.

Abstract: A sealing glass composition comprises a PbO-containing glass frit, two particulate refractory fillers having controlled particle size distributions, and optionally at least one additive to prevent the chemical reduction of the PbO when the frit is fired in the presence of reducing conditions. The sealing glass composition is useful as a package sealant. It is especially useful as a solder glass for sealing a face plate portion to a funnel portion of a color television picture tube at temperatures of about 400.degree. C. A particulate glass composition for use in preparing the sealing glass composition, a sealing glass paste and methods of using the sealing glass and paste are provided.

Abstract: A sealing glass and a sealing glass paste for sealing the face plate and funnel portion of a color television tube wherein PbO-containing sealing glass frit contains from an effective amount of a powder, such as Pb.sub.3 O.sub.4 powder, which powder prevents the reduction of PbO to Pb metal during the sealing process, which reduction would otherwise result in a dielectric breakdown in the seal. A sealing glass paste consisting essentially of a PbO-B.sub.2 O.sub.3 -ZnO sealing glass frit and containing an effective amount of said powder, based upon the weight of the frit, together with hydroxypropyl cellulose binder for the frit and a solvent for the binder. A method for sealing the face plate of a color television tube to its funnel portion with a PbO-containing solder glass wherein the reduction of PbO to metallic lead during the sealing step is obviated by the addition of a sufficient amount of Pb.sub.3 O.sub.4 or BaO.sub.2 powder in the solder glass and paste made therewith, which Pb.sub.3 O.sub.4 or BaO.