Michael Molitch-Hou for Engineering.com: Although it’s possible that patents have existed since the time of the Ancient Greeks, the Venetian Patent Statute is more widely recognized as the first official patent system. Established in 1474, the statute declared that 10-year patents could be granted to "any new and ingenious device, not previously made.”
Along with all of society’s rules and mores, patent law and intellectual property (IP) have changed over time. We are now living in the post-Internet era, in which ideas and files are exchanged all around the world on a regular basis. It is now possible to download Phil Collins’ entire discography, whether it’s legal or not. It’s also possible to download 3D printable guns, legal or not. Full article:
EXAIR's compressed air operated Line Vac connects to standard hose or tube to create a powerful in-line conveyor. The compact design features large throat diameters for maximum throughput capability. Eleven sizes in aluminum and ten in stainless steel are suited to a wide variety of transfer applications.
Line Vac conveyors are ideal for moving large volumes of material over long distances. A small amount of compressed air is injected through directed nozzles to produce a vacuum on one end and high output flows on the other, with instantaneous response. The material flow rate is easily controlled with a pressure regulator. An optional bracket permits easy mounting. No moving parts or electricity assures maintenance free operation.
Line Vacs are available in a number of styles, materials, and sizes, including Line Vac, Threaded Line Vac, Heavy Duty Line Vac, Sanitary Flange Line Vac and Light Duty Line Vac. See the Line Vac in action at https://exair.co/watchlinevac?pub=184