USA HISTORY

Detailed explanation-1: -The initial protective hats were worn by high scalers-workers that were suspended from cables and used jackhammers to remove rocks from the cliffs. High scalers created their own head protection by taking a cloth hat, dipping it into tar and letting it harden in the sun.

Detailed explanation-2: -In the 1920’s, the first industrial hard hats went into mass production, made from steamed canvas, black paint and glue. These were the first protective caps developed specifically for industrial purposes, and were widely used on shipyards across the United States.

Detailed explanation-3: -Edward W. Bullard invented the hard hat, the first commercially available industrial head protection device. Bullard’s lightweight, non-conducting hard hat design was sturdy enough to withstand many falling objects.

Detailed explanation-4: -Edward W. Bullard actually began working on a concept for protective headgear in 1915. But it wasn’t until after his experiences in World War I that his design finally took shape. He opted to use a heavy duck canvas, which was then formed to fit the human head with steam, hence the name Hard Boiled Hat.

Detailed explanation-5: -Within the press, the pellets are heated to melt them. The molten plastic is injected into the mold to form the hard hat shell. The press opens the mold and ejects the shell onto a conveyor belt. A worker picks the shell up and cuts off the sprue (a lump formed where the molten plastic entered the mold).