Penicillin was being mass-produced and advertised by 1944. That antibiotic mold turned out to be the fungus Penicillium, and over the next two decades, chemists purified it and developed the drug penicillin, which fights a huge number of bacterial infections in humans without harming the humans themselves. The sample had become contaminated with a mold, and everywhere the mold was, the bacteria was dead. In 1928, the Scottish scientist Alexander Fleming noticed a bacteria-filled Petri dish in his laboratory with its lid accidentally ajar. It's one of the most famous discovery stories in history. John Hackney is an IMAGINiT Technologies Mechanical Application Engineer with 25 years design expreinece in various manufacturing disciplines including converting and high speed pick and place machinery.Alexander Fleming pictured in his laboratory (Image credit: Bettmann / Contributor) Sure does beat using a calculator and drawing board!įor more Inventor tips and tricks, check out IMAGINiT Manufacturing Solutions Blog. The next step is to use the Inventor sheet metal “Rip” command to add a gap to the duct.įinally, select the side of the duct you desire to be on the outside of the flat pattern, and pick the “Create Flat Pattern” tool. It this value is not exact, the creation of a flat pattern will fail. The next step is to set the sheet metal default to match the thickness used in the Thicken/Offset command.

Please note that I have made the surface model invisible in the second screen shot. In my example, I am using 0.075″ (14 GA Mild Steel).

Next you need to use the Inventor “Thicken/Offset” command to add the desired sheet meal thickness to the inside of the branch duct surface.

Inventor steel