Abstract: The ORP of the initial etchant solution is utilized as a set point. A predetermined change in the ORP triggers the removal of a predetermined volume of spent etchant. Fresh etchant addition steps and oxidation of the working etchant (addition of chlorine) are sequenced by the initial fixed volume withdrawal. The oxidation and fresh etchant addition steps proceed to conclusion independently. The oxidation step is terminated by a return of the ORP to the initial level.

Abstract: A method and apparatus of splicing a train for veneer sheets being fed in a horizontal direction on infeed and outfeed conveyors operated by electric sensors that signal the conveyors to start or to stop at predetermined appropriate times when the preceding and succeeding veneer sheets pass certain predetermined positions, coordinated with application of a strand and beads of a thermoplastic adhesive onto said train of the veneer sheets on conveyors by a cold press. According to this method and apparatus, the splicing of veneer sheets may be achieved with an increased speed and strength of splicing in the transverse direction, in comparison with conventional method and apparatus.

Abstract: A keyboard assembly includes an insulative substrate upon which are carried a plurality of conductive paths. Respective portions of the paths are selectively bridged upon depression of a dome-shaped conductive resilient contact element. A pair of space-opposed regions of the dome's marginal portion are deformed downwardly away from its apex so as to constitute a pair of space-opposed feet. The feet have a complex shape which leads to high lifetime of the dome. Preferably, the feet rest on corresponding conductive pads, and the pad pairs for adjacent domes may be differently oriented so as better to accommodate the passage of leads between those domes. Leads on the substrate passing beneath dome edges desirably are depressed into the substrate. Overlying the domes in a completed assembly is a layer of deflectable insulating material that is adhesively affixed to the substrate and to the domes; the latter includes an aperture in registry with each dome but of a diameter smaller than the width of such dome.

Abstract: Method and apparatus for wrapping a cord or wire in a toroidal helix about a liner to form a closed torus carcass. An extruder, die, and diehead provide means for extruding a liner having a horseshoe-shaped profile. Circumferential edges of the liner are joined with a preformed assembly of bead rings and a spacer ring. Cord or wire is wound snugly about an array of control fingers and then slipped off the fingers as successive tensionless turns about the liner and rings as the latter rotate through a winding plane in which a spool supplying cord or wire orbits. No rigid core is required. An endless inflatable tube can be used in lieu of the extruded liner.

Abstract: An elastomeric or rigid polymeric material, such as a propellant, is strongly bonded to an incompatible material, such as a silicon rubber liner, when a long chain polymer which is insoluble in and unreactive with the liner but has groups reactive with the propellant is added to the liquid or uncured liner. As the liner cures, the polymer chain migrates to the surface. Upon laying the propellant on the surface and curing the propellant, the propellant is cross-linked to the long chain polymer, which is entangled in the rubber liner.

Abstract: Adhesive composition comprisingA. at least one monomeric ester of 2-cyanoacrylic acid, andB. at least one polymerization initiator selected from caffeine and theobromine.

Abstract: An aqueous solution for etching a glass layer on a metal (aluminum) substrate without substantial attack on the metal. The solution comprises buffered hydrofluoric acid, sodium chloride, and either (a) a fluorocarbon surfactant capable of forming a protective thin film upon the aluminum, or (b) a 6-hydroxy alcohol (e.g., mannitol or sorbitol).

Abstract: The invention contemplates a method for making fabric-lined bearing wherein the fabric is of knitted construction, from yarn consisting primarily of low-friction filaments and high-strength filaments, and wherein the exposed filaments at the bearing interface are primarily oriented to be generally transverse to the predominant direction of intended motion under load at the bearing interface.

Abstract: A primer composition is provided in the form of an aqueous-alcoholic reaction product of an amino alkyl polyalkoxysilane and an alkyl carbonate. There is also provided a composite of an organo silicon-polycarbonate block copolymer and a glass substrate, and a method for making such composite involving the treatment of the glass substrate with the above described primer composition.

Abstract: Herein disclosed is an apparatus for removing and mounting a tire component from and onto a collapsible building drum which is in a collapsed state. The apparatus comprises a truck movable toward and away from a collapsible building drum, drive means mounted on the truck to move the truck toward and away from the building drum, an upstanding post assembly mounted on the truck, a pair of tire component supporting rods mounted on the upstanding post assembly to be revolvable around the circumferential outer surface of the building drum for removing and mounting a tire component from and onto the tire building drum held in a collapsed state, and revolving means mounted on the upstanding post assembly to revolve the tire component supporting rods around the circumferential surface of the building drum.

Abstract: Method and apparatus for building green tires, wherein stitching means is mounted on a carrier which transfers a tire component to and around the circumference of another tire component laid on a tire building drum. The carrier in the form of a ring shape is adapted to be axially movable toward and away from the circumference of the tire building drum and has holding means for releasably holding a tire component and a green tire. The stitching means stitches the tire components together on the tire building drum while the carrier is surrounding the circumference of the tire building drum.

Abstract: Tape applying mechanism of carton sealing machines for feeding pressure sensitive tape having an uncoated back side and an adhesively coated face and to apply the latter to end panels of an advancing carton and lap it over the opposed longitudinal edges of folded-in side flaps of such carton. It includes means to guide the tape along a path extending toward and for lap against a wipe-on applicator cylindrical roller that is movably supported for swing toward and away from a carton travel path with the adhesively coated face exposed outward away from this roller.

Abstract: A composition for etching polyimide based polymers comprised of a tetraalkyl ammonium hydroxide and an organic acid selected from the group of acetic acid, tartaric acid and oxalic acid.The etchant may be used to texture polyimide films or form perforations through polyimide substrates or layers, particularly in the fabrication of printed circuits and semiconductor devices where via holes are required for interconnection of circuitry.

Abstract: A process for polishing surfaces of sapphire or similar materials to remove surface imperfections visible at magnifications of 1,000X or higher regardless of the shape of the surface, is disclosed, which process comprises the steps of heating the material to an elevated temperature and exposing the surface to be polished to a static hydrogen environment.

Abstract: Methods for preparing laser fusion targets of the ball-and-disk type are disclosed. Such targets are suitable for irradiation with one or two laser beams to produce the requisite uniform compression of the fuel material.

Abstract: A retread envelope press, seamless retread envelope, and method for manufacturing said seamless retread envelope are described as facilitating the production of superior retreaded or recapped tires. In particular, a seamless elastomeric compression-formed envelope is described which is formed and cured in a configuration having a U-shaped radial cross section. The envelope of the present invention also has a rip-resistant bead disposed along its peripheral edges. In manufacturing the envelope, an uncured chloro-butyl rubber slug of appropriate volume is placed in an annular compression chamber defined between two platens. As the platens are moved from a first feed position to a second forming position, the volume of the compression chamber is reduced and the elastomeric slug material is forced around a radially symmetrical core.

Abstract: The disclosure relates to patterning of platinum effectively and then removing the mask from the platinum without attacking the chromium metal beneath the platinum. If tantalum is used on top, which metal can be patterned with CF.sub.4, the tantalum can be patterned and the platinum can then be patterned quite readily and the tantalum can then be removed with the CF.sub.4 again and then the gold can be plated up onto the platinum patterns and the chromium can then be etched out using conventional chromium etch which will not attack any of the other metals.This solves the problem of high yield patterning with a metal mask and process for patterning and removal of that metal mask that is compatible with the chromium-platinum metal system. The advantage of the chromium-platinum system over the titanium-platinum system is the resistance of the chromium to silicon etch. Therefore, the principal application of this invention would be in the fabrication of mesa devices.

Abstract: A nylon-base adhesive composition for metals is composed of 100 parts by weight of a mixture of nylon 11 and nylon 12 and about 2-40 parts by weight of nylon 6-12. The adhesive composition has excellent heat resistance and water resistance and is particularly useful for making cans. The properties of the adhesive composition can be further improved by adding thereto polyethylene, an ionomer, or a mixture thereof.A process for bonding steel sheets using the adhesive is also disclosed.

Abstract: The present invention relates to a magnetic patch attaching device wherein a continuous roll or reel of adhesively backed magnetic stripes are arranged so that introduction of a document into the machine by means of which the stripe is to be attached permits the reel of tape to be advanced in such manner that an individual stripe is peeled away from the backing tape and applied to the document while the latter is simultaneously withdrawn from the apparatus, the tape being pressure bonded to the surface of the document during withdrawal of the document, leaving the apparatus available for the introduction of the next document.

Abstract: Graphic reproductions are achieved by the image-wise modification of the triboelectric charging capability of a surface followed by the triboelectric charging of the modified surface to produce a charge pattern corresponding to an image. The charge pattern may be developed with finely divided colored electroscopic particles and the resulting colored image either fixed on the surface of the insulating member or transferred to a receiving surface and fixed thereon.