US Patent: 4,828,474
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| Hydraulic cylinder device for platen spacing indication and control
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Patentee:
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| Ronald Ballantyne (exact or similar names) - Burlington, ON Canada |
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Patent Dates:
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| Applied: |
Sep. 24, 1987 |
| Granted: |
May 09, 1989 |
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Jeff Joslin
Vintage Machinery entry for John T. Hepburn, Ltd.
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Description: |
| "A press has upper and lower platens which can be moved towards and away from one another. Four hydraulic leveling cylinders are mounted in a vertical orientation on the lower platen for purposes of platen parallelism control..." |
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