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The first manhole machine type "TORNADO" |
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A further milestone in PRINZING's history was the development in 1976 of the first manhole machine type TORNADO which is today one of the most sold machines of it's type.
Due to following developments the TORNADO manhole machine today is of a highly technical standard and can be delivered according to the requirements of customers in various countries:
| 1981 |
Automatic cast-in-place of step elements
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| 1984 |
Automatic step feeder and step magazine
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| 1987 |
Efficient production of manhole base units of a high standard by "curing them on the steel spigot pallet" |
| 1987 |
Program controlled infinitely variable adjustment of the height |
| 1987 |
Improvement of quality for the production of manholes by using a steel keeper ring on the spigot during curing
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| 1989 |
Production of palisades |
| 1990 |
Improved vibro-compaction process for exact length (GEBA-process) |
| 1993 |
Completely automatic plant for manhole products |
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