Thursday, September 10, 2009

Reinforcing Laps

After Jacob Davis patented his rivets overalls improvement there was an influx of similarly-minded patents. With all these patent requests you would think seam reinforcements was suddenly fashionable after 1873. Rivets and cloth material used to strengthen a seam was of course a utilitarian idea at the time and patent would have been a great marketing tool for workwear brands and manufacturers.

Below is a drawing from an 1874 patent granted to Jacob Greenbaum, apparently for the Greenebaum Brothers outfit in San Francisco. The idea is to reinforce stress points on seams that tend to rip using a material "of any desired fabric." I wonder if using leather, as some vintage overalls have, would have infringed upon this patent.


Anonymous Anonymous said...

As long as the corners of the pockets were not strengthened with overlapping pieces of material of any kind, you would not be infringing on the patent. Greenbaum sometime used denim instead of leather, I have only seen this when they teamed up with Sachs and Freeman in 1878.

1/12/2010 09:34:00 PM  

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