In forming batches of town refuse into bales in order to prevent the formation of compressed air pockets within the bale which would tend to cause the bale to increase in dimension or perhaps disintegrate, the batch of material while in the bale chamber is treated with steam so that this steam at least partially fills the pockets an upon cooling forms partial vacuums in the pockets, whereby the inherent compressive forces of compressed air pockets are avoided.
展开▼