Likewise, it may employ the compaction shoe device (90, 92) for precompacting edge, seam or rut portions of a roadway.

As well as the pre-compaction, Michael Hahmann and his team also kept a constant eye on the evenness.

Compensating adjustments for powder flow between columns and for density gradients are made during the pre-compression and shock compression.

To achieve optimum pre-compaction, all three pavers were fitted with a high compaction screed.

In a prior art method of filling containers such as paper bags, the material (13) to be introduced into the bags is first compacted in a compaction chamber (1).

Compaction is carried out either by means of vibrators inserted in the material or by means of suction heads which, after each suction operation, must be blown free of material.

The apparatus also includes a precompaction unit (34) for squeezing air out of the fiber web and a resin mixture paste dispenser (36) for applying paste to the fiber web.

Very high precompaction of the binder course prevents the binder course material mixing with that of the surface course and ensures clear separation of the layers as well as an optimum surface seal.