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Principles of Operation
Shrink sleeve labels are supplied from a roll in the form of a continuous web (1), unlabeled containers are transported via an infeed conveyor and then metered via a rotating feedscrew (2). As the containers enter the labeler, the labels in web form are opened and formed into a tube by a mandrel (3), fed in precise registration with a printed graphic (4), cut in precise registration (5), applied to a container (6) which is then transported via conveyor to a steam tunnel where controlled steam heat shrinks the sleeve tightly onto the container in an enclosed steam tunnel (7). During this process, containers enter the sleeve applicator via an infeed conveyor and are precisely metered and separated using a rotating feed screw. After the sleeve label is registered and cut from the web, it is applied to the container. The containers then exit the applicator via a discharge conveyor which immediately transports them into a steam heat shrink tunnel which exposes the container and the label to controlled steam generated heat which causes the label material to shrink and tightly adhere and conform to the container. Containers then exit the shrink tunnel via a discharge conveyor (8).
