Abstract: Methods and apparatus for supplying a clip to a clip window associated with a closure attachment mechanism having a closure punch path for attaching a single clip or two clips to a target tubular work piece in a closure zone include: (a) forcing a plurality of clips to travel in a first predetermined clip travel path having a forward direction toward a first punch path in a closure zone at a first point in time; (b) selectively retracting the plurality of clips so that the clips travel in a reverse direction along the first predetermined clip travel path; and then (c) forcing the plurality of clips to again travel in the forward direction along the first predetermined clip travel path at a second point in time.

Abstract: An apparatus for enclosing a product in a covering material includes a product feed and covering system, a clipper mechanism and a tensioning system. The product feed and covering system is configured to apply the covering material over the product. The clipper mechanism is disposed downstream of the product feed and covering system along a flow path of the covering material. The clipper mechanism is adapted to receive the covering material and to secure a clip to the covering material received therein. The tensioning system is adapted to introduce a tensioning load to the covering material after and while the covering material is received in the clipper mechanism.