Abstract: A keyboard may be provided that has keys overlapped by a touch sensor. The keyboard may have key sensor circuitry for monitoring switching in the keys for key press input. The keyboard may also have touch sensor circuitry such as capacitive touch sensor circuitry that monitors capacitive electrodes in the touch sensor for touch sensor input such as multitouch gesture input. The keyboard may include an outer layer of fabric that overlaps the keys. The fabric may have openings that are arranged to form alphanumeric characters. Light sources may emit light that passes through the openings and illuminates the alphanumeric characters. The touch sensor may have signal lines that are not visible through the openings. The signal lines may be transparent, may be covered by a diffuser, or may circumvent the openings so that they do not overlap.

Abstract: Commercially available solid rubber modified acrylic multipolymers and polycarbonate polymer are tumble blended and melted and extruded through an extruder. Resulting alloys comprise an unsaturated rubber such as polybutadiene grafted with methylmethacrylate and styrene; a multipolymer comprising methylmethacrylate and styrene, and acrylonitrile, ethylacrylate, or methylacrylate; and polycarbonate. The ratio of rubber to graft monomers ranges from about 1:1 to about 6:1 and is preferably about 3:1. Graft monomers comprise from about 60 to about 85 parts methylmethacrylate, about 15 to about 30 parts styrene, and up to about 15 parts methylacrylate, ethylacrylate, or acrylonitrile. The multipolymer comprises from about 60 to about 80 parts of methylmethacrylate, about 15 to about 30 parts of styrene, and up to 15 parts of methylacrylate, ethylacrylate, or acrylonitrile. The ratio of graft rubber to multipolymer ranges from about 5:95 to about 25:75.

Abstract: Modified rubber compositions comprise, by weight, about 15-60% of a highly saturated aliphatic rubber, such as ethylene-propylene-diene rubber, about 25-80% of preferably non-nitrogenous acrylate monomer units; and less than about 5% multi-functional monomer units. The compositions exist as amorphous heterogeneously dispersed phases. The first phase comprises the copolymer rubber, to which polymers of at least 10%, preferably 20%, and more preferably 30% of the other monomer units are grafted. The second phase comprises the other monomers polymerized as homo and copolymers, not grafted to the rubber.The modified rubber composition, preferably non-nitrogenous polyacrylate polymer, and another polymer are mixed together to form a polymer blend having higher impact strength and other important properties.

Abstract: A method and apparatus for sealing packages, e.g., microelectronics packages containing heat sensitive elements, by applying heat to melt solder on the peripheries thereof. At the same time heat is being applied to a package heat sinks are simultaneously engaged with the top and bottom portions thereof to carry off excess heat and thus protect the heat sensitive elements from damage.