US Patent: 1,620,534


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Press

Patentee:

Charles R. Gabriel (exact or similar names) - Brooklyn, NY

USPTO Classifications:

72/263, 72/271, 72/30.1, 72/443

Tool Categories:

metalworking machines : metalworking presses : punch presses

Assignees:

E. W. Bliss Co. - Brooklyn, NY

Manufacturer:

E. W. Bliss Co. - Brooklyn, NY

Witnesses:

Unknown

Patent Dates:
Applied:	Apr. 14, 1926
Granted:	Mar. 08, 1927

Patent Pictures:

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Vintage Machinery entry for E. W. Bliss Co.

Description:

This improvement is particularly applicable to presses used for extruding where the start of the extrusion portion of the press stroke causes a serious shock force, which limits the speed at which the press can be run. This improvement provides a variable stroke that slows down the initial part of the extruding process and then speeds up.