Heat shrink apparatus and device for packaging, and packaging line and process using said heat shrink apparatus and device
AssigneeCryovac, Inc.
InventorsRiccardo Palumbo, Giulio Benedetti, Silvia Bottini, Stefan Landolt, Peter Thurig
Life of this patent
Estimating the term…
Abstract
A package comprises a plastic bag delimiting a seat sealingly housing a product. The plastic bag has plastic film walls (4) and at least one sealing band connecting together opposed wall portions of the plastic film walls at a connecting zone. A tab is coupled with the connecting zone of the plastic bag. The tab includes an easy opening feature at one or more of its perimeter edges.
Claims20
A heat shrink device for processing containers that include heat shrinkable plastic film, the containers each having a main portion in which a product is housed, a terminal portion that is not occupied by the product, and an intermediate portion connecting the main portion and the terminal portion, wherein the device comprises:
- first and second shrink belts that are opposed to each other, wherein the first shrink belt has a first operative stretch facing a second operative stretch of the second shrink belt, wherein the first and second operative stretches have external surfaces defining a gap therebetween, wherein the gap is configured to receive the terminal portion of each container to be processed;
- a first belt heater associated with the first shrink belt, the first belt heater configured to bring the external surface of the first operative stretch at least to a shrink temperature such that the terminal portion of each processed container passing through the gap is heat shrunk;
- a sealer configured to form a heat sealing band on the terminal portion of each processed container thereby sealing each processed container;
- and
- a pair of rollers located downstream of the first and second shrink belts with respect to a direction of movement imparted by the first and second shrink belts to the processed containers, wherein the pair of rollers define a nip therebetween for receiving the terminal portion of each processed container;
- wherein the sealer includes a heated circumferential feature on an external surface of one of the pair of rollers.
A heat shrink device for processing containers that include heat shrinkable plastic film, the containers each having a main portion in which a product is housed, a terminal portion that is not occupied by the product, and an intermediate portion connecting the main portion and the terminal portion, wherein the device comprises:
- first and second shrink belts that are opposed to each other, wherein the first shrink belt has a first operative stretch facing a second operative stretch of the second shrink belt, wherein the first and second operative stretches have external surfaces defining a gap therebetween, wherein the gap is configured to receive the terminal portion of each container to be processed
- a first belt heater associated with the first shrink belt, the first belt heater configured to bring the external surface of the first operative stretch at least to a shrink temperature such that the terminal portion of each processed container passing through the gap is heat shrunk;
- a sealer configured to form a heat sealing band on the terminal portion of each processed container thereby sealing each processed container;
- and
- a pair of rollers located downstream of the first and second shrink belts with respect to a direction of movement imparted by the first and second shrink belts to the processed containers, wherein the pair of rollers define a nip therebetween for receiving the terminal portion of each processed container;
- wherein the sealer includes a heated feature on an external surface of one of the first and second shrink belts.
Dependencies are inferred from the claim text.