Sheet material assemblages each having a jacket section enclosing a plurality of inner sections are formed by sequentially moving a circular array of upwardly opening pockets through an arcuate array of feed stations. A jacket section feed mechanism at a first one of the stations feeds a jacket section into each of the pockets in turn. A plurality of single inner section feed mechanisms feed inner sections one at a time into an open jacket section in each of the pockets in turn. A plural inner section feed mechanism is operable to feed a plurality of inner sections at a time into a jacket section in each of the pockets in turn.