US Patent: 5,156,782 - Maintaining press platens in parallel relationship


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US Patent: 5,156,782

Maintaining press platens in parallel relationship

Patentee:

Ronald Ballantyne (exact or similar names) - Burlington, ON Canada

USPTO Classifications:

100/258A, 100/46, 264/320, 264/40.5, 425/149, 425/150

Tool Categories:

metalworking machines : metalworking presses : hydraulic metalworking presses

Assignees:

John T. Hepburn, Ltd. - Mississauga, ON Canada

Manufacturer:

John T. Hepburn, Ltd. - Mississauga, ON Canada

Witnesses:

Unknown

Patent Dates:
Applied:	Oct. 02, 1991
Granted:	Oct. 20, 1992

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for John T. Hepburn, Ltd.

Description:

"Press platens are maintained parallel in critical central regions proximate to a mold between the platens. Leveling cylinders acting between the platens to resist downward action of a central ram on a movable platen..."