Monday, May 23, 2016

stencil manufacturing 4

Stencil Manufacturing ( part 4)

I (Mr. Gumbinner) invented and patented a stencil with a yellow top coat and a heavier black coat on the underside. These stencils were sold to Weber Addressing and Sten-C-Label who made a small device to mark shipping cartons. They mounted the stencils to a backing sheet, which when the address was typed could be kept in the office and the stencil be sent to the shipping department to mark the packages. This reduced the possibility of shipping errors as well as saving the time of making a Marsh stencil. We used Marsh stencils to mark our shipping cartons. In the 1940s, much of Polychromes production was for the armed forces. An inspector would check the shipments before it was released. They always accepted our test results. When a new inspector came, he would make us remark the cartons. The inspectors weren’t consistent.
We were not patent conscious in the forties, so we did not patent several other of my stencil inventions. Two other products that we produced on the stencil coating machine were a clear stencilizing coating on a heavy tissue for strain gauges. This was for a company in Eddystone, Pennsylvania and a heat sensitive paper which was used in cardiograph machines and similar marking applications. The black tracing was made by a heated sapphire stylus.