Abstract: This invention is a method for manufacturing an electrophotographic developer for use in electrophotography or electrostatic recording processes. The developer comprises polymer particles by suspension polymerizing, in an aqueous phase, a polymerization liquid comprising at least one polymerizable vinyltype monomer, a polymerization initiator, and a finely divided dispersion stabilizer either sparingly soluble or insoluble in water and said monomer. Said polymerization liquid is blended prior to suspension polymerization. The improvement includes adding to said liquid, a resinous substance, as a fluidizer which is soluble in the monomer and having a solubility parameter in the range of from 7.8 to 16.1. During the blending, the dispersion stabilizer is uniformly dispersed throughout said polymerization liquid.

Abstract: Costume jewelry is manufactured through photofabrication processes from flat metal sheets to form items such as earrings and small pendants. A standard photo-fabrication operation includes covering a metal sheet with a layer of photosensitive, chemically resistive material commonly referred to as a photoresist. Portions of the covered sheet are exposed to light to outline the earrings and pendants on the sheet. The sheet is then developed and the exosed metal surface portions are chemically etched to remove excess metal and form the earrings and pendants. Thereafter, surface treatments involve supplementary photofabrication operations to provide different colors and finishes on the earrings and pendants by etching, plating and staining the exposed metal surfaces, all of which are supplemented by the retention of portons of photoresist layers of selected colors.

Abstract: Alkaline etching baths for aluminum are claimed in which oxidizing agents at low concentration replace chromates and fluorides in the control of galvanizing. Etching processes using these new baths are also disclosed and claimed.

Abstract: An apparatus for splicing together two large sheets of material, e.g., seismic sections, where one operator can carry out the splicing operation. The apparatus is comprised of a work surface onto which the material is positioned and held in place by vacuum and mechanical means. A carriage, mounted on guide means which extend across the work surface, has a knife which cuts the material along a desired line as the carriage moves in a first direction and adhesive dispensing means to apply tape to the material along said desired line as the carriage moves in the opposite direction.

Abstract: A ceramic green sheet material is metallized by laminating a thin organic material, preferably MYLAR, to a ceramic green sheet surface, and then employing an electron beam to define a predetermined pattern of openings extending through the organic material and selectively into and through the green sheet. The resulting channels and via holes are then filled with a metal paste. The organic mask is removed by peeling subsequent to the metal paste deposition step.

Abstract: Improvement in the process and apparatus of Application Ser. No. 236,766 filed Mar. 21 1971, now U.S. Pat. No. 3,769,124. There is described a technique for butt welding a trailing end of one roll of thermoplastic film or sheet material to the leading edge of another roll of such material by vertically superimposing the trailing and leading portions of the two rolls, aligning the lateral edges of such portions over a significant distance sufficient to insure angular alignment of the two rolls at the butt weld. Severing the two portions along a coincident transverse line, heating the severed portions to an extent sufficient to weld such together, and bringing the heated transverse edges of the two portions together while maintaining lateral edge alignment of said portions, whereby butt welding such into a continuous sheet.

Abstract: A process for the production of multiple-layer sheets, panels, shaped articles, or the like laminates having at least one layer of polyurethane foam material wherein at least one side of the polyurethane foam layer is bonded under the action of heat to a layer of cross-linked polyethylene foam material.

Abstract: Artificial leather having a crepe pattern is produced by a process comprising preparing a base cloth material at least a part of which is composed of highly heat shrinkable yarn and less heat shrinkable yarn, said highly heat shrinkable yarn having a heat shrinkage rate of at least 10 percent at a temperature within the range at 80.degree. to 230.degree.C and the difference in the heat shrinkage rate between said highly heat shrinkable yarn and said less heat shrinkable yarn being at least 5 percent within the same temperature range, forming a synthetic resin film layer on said base cloth material to obtain an artificial leather material having a smooth synthetic resin surface, and subjecting said artificial leather material to a heat treatment to form a crepe pattern on said synthetic resin film layer due to the heat shrinkage difference between said highly heat shrinkable yarn and said less heat shrinkable yarn of said part of said base cloth material.

Abstract: A glass or other dielectric backed transducer structure is formed by utilizing a series of processes including at least one electrostatic bond. The processes enable one to bond a semiconductor wafer to a dielectric as a glass wafer. Then by selectively removing certain conductively semiconductor, one obtains a "thin ribbon" piezoresistive bridge secured to a thin glass wafer. The resultant structure is entirely unanticipated by the prior art.A glass part is also formed by electrostatically bonding a glass wafer to a semiconductor wafer, polishing the glass to a desired depth, masking the polished glass layer according to a desired pattern representative of the glass part, etching away all the glass except the desired pattern, and thence removing all the semiconductor.

Abstract: A process step and material for use in the manufacture of semiconductor photomasks. To facilitate the etching of unmasked chromium, gold, and other metals capable of forming oxychloride derivatives on preselected portions of a substrate material, the material is exposed to a low pressure rf generated "cold" plasma (under 300.degree.C) produced from a homogeneous gaseous mixture of oxygen and a halogen containing compound.

Abstract: A process for the preparation of unsaturated polyester resin based sheet moulding compounds in which the compound is matured by including a gelling agent for the copolymerisable monomer in the resin matrix and subjecting the sheet moulding compound to a temperature sufficient to cause the gelling agent to gel the copolymerisable monomer without activating the polymerisation initiator.

Abstract: A method of and apparatus for applying and securing mirror mounts to the inboard surfaces of windshields. The apparatus includes means for optically scanning the surface of the windshield and detecting the presence of antenna wires or other markings therein to be used as reference points for the placement of a mirror mount on the windshield. The apparatus also includes means responsive to such detecting means for placing and affixing a mirror mount on the windshield in a desired region thereon.

Abstract: As a laminated film formed by continuously melt extruding an .alpha.-olefin polymer as a covering film on a traveling, continuous substrate film of an .alpha.-olefin polymer is being cooled by means of a cooling roll contacting the covering film side, pressing rolls are pressed against the laminated film on the substrate film side, along the lateral edge parts thereof, and toward the cooling roll thereby to cause local plastic deformation and thinning of the cover film, which has not fully solidified, due to elastic deflection without appreciably thinning the substrate film, and then the pressing rolls are retracted away from the laminated film, whereby thin-film regions for ensuring positive gripping by tentering clips for lateral stretching are formed along the lateral edge parts.

Abstract: A method of joining pieces of fabric wherein a high temperature-resistant shrinkable film is placed between the overlapping or on the abutting ends of fabric, after these have been impregnated with a highly volatile solvent for the film, and the ends of the fabric are joined by subsequent pressing.

Abstract: Compositions are disclosed for making thermoplastic adhesives and coatings. The compositions include coal tar pitch and two copolymers of ethylene in which the copolymers are cross-linked with dicumyl peroxide.

Abstract: Metal foil is applied to sheet metal by a film of polythene adhering to both and separating the two from direct contact, for improving the heat-insulating qualities of the sheet metal, by superimposing the film on the sheet metal, superimposing the foil on said film, and drawing the laminated assembly under tension along a convex curved surface, said foil next to said surface, and simultaneously heating said sheet metal to heat, by conduction, said film, heat and pressure on said foil causing it to bond to said foil and said film.

Abstract: The invention is a simplified roller-type apparatus for laminating articles in sheet form with transparent plastic laminating film. It comprises a heating station for heating the work and a pair of pressure rolls for bonding the film to one or both sides of each article. The heating station comprises a pair of vertically opposed flat plates that are separable to permit the work to be inserted between them, and means for heating the plates so that they act as sources of heat for activating the adhesive layer of the laminating film. In the preferred embodiment, the lower plate is fixed and the upper plate is mounted for vertical movement relative to the lower plate. The two plates also act as guides for directing the heated work into the nip formed by the pressure rolls.

Abstract: A method of making thin diaphragms having an accurately controllable thickness for semiconductor pressure responsive devices. An oxide coating is thermally grown in selected regions on the front side of a silicon wafer. The oxide extends into the wafer at an extremely accurate and controllable depth to form a groove in the wafer front side defined by the selected regions. Portions of the wafer are then etched from the back side until the bottom of the groove is reached thereby providing a diaphragm having a thickness equal to the accurately reproducible depth of the groove.

Abstract: A method for constructing a relief sculptured sound grill comprising the steps of soaking a strip of flexible material in a starch solution and thereafter securing the flexible material between a male and female mold member so that the mold members form the desired relief sculpture on the flexible material. The strip of material is then dried and paint is applied to the relief sculpture and dried thereby permanently forming the relief sculpture on the strip of material. A frame is then secured around the periphery of the strip of material and the mold members are removed so that a hardener may be applied to the entire strip of material. The strip of material with the attached frame is then dried thus completing the relief sculptured sound grill of the present invention.

Abstract: A device for butt splicing a succeeding web to a preceding web comprisingA rotatable cutting drum provided with a cutting member,A rotatable cutting and splicing drum provided with a cutting member and means for holding the leading end of the succeeding web after cutting, andA rotatable splicing drum provided with means for holding a piece of a splicing tape, characterized in that rotation of the drums causes the cutting drum and the cutting and splicing drum to cut at least the preceding web of the succeeding and preceding webs, and the leading end of the succeeding web after cutting, while being held by the cutting and splicing drum, is fed into a splicing zone, whereby the cutting and splicing drum cooperates with the splicing drum to butt splice the succeeding web on the preceding web by applying the splicing tape thereto.