US Patent: 3,170,735 - Insulated die set


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US Patent: 3,170,735

Insulated die set

Patentee:

Harland H. Coffin (exact or similar names) - Bridgeport, CT

USPTO Classifications:

174/138D, 174/152R, 384/30, 403/230, 403/365, 403/404, 72/467, 76/107.1

Tool Categories:

trade specific : tool and die maker

metalworking machines : metalworking presses : punch presses : dies for punch presses

metalworking machines : electrical discharge machining

Assignees:

Producto Machine Co. - Bridgeport, CT

Manufacturer:

Producto Machine Co. - Bridgeport, CT

Witnesses:

Unknown

Patent Dates:
Applied:	Nov. 17, 1960
Granted:	Feb. 23, 1965

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Producto Machine Co.

Description:

This die set has the upper and lower plates insulated from one another, as needed for EDM. The die set can still be used "in punch press production runs."