Package making – Methods – Wrapping contents including cover forming
Patent
1987-03-09
1988-11-15
Culver, Horace M.
Package making
Methods
Wrapping contents including cover forming
53466, 53 66, 53 75, 53 76, 53228, 53557, B65B 1108, B65B 5114, B65B 5306, B65B 5902
Patent
active
047839503
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a machine capable of automatically forming a wrapping of heat-shrinkable plastic protective film over objects having different sizes, in particular when said objects are containers such as luggage, packages, bags, etc. used as baggage. In the passenger transport field, be it by air, rail, road or sea, the passenger is obligated many times to consign his baggage to the carrier who later returns it to the passenger at the destination.
With regard to the air transport of passengers, in particular, the safety of the baggage is not at present assured in any way as far as tampering and damage is concerned.
The baggage may consist of luggage or similar of a certain quality or, in the contrary case, it can be a package or sack which may be of poor quality and may or may not be properly closed. In both cases it would be useful if the baggage were consigned and protected by means of a sealed protective lining.
The following advantages would be derived thereby:
a tight seal making tampering by unauthorized persons impossible, particularly with respect to suitcases closed by means of zippers;
safety against accidental opening through breakage of hinges or latches, during various stages of transport;
protection against damage caused by scratching and cuts to the lining material during all transport stages, especially air transport;
impermeability to condensates and liquids, as well as protection of baggage during loading and unloading operations outdoors, under adverse weather conditions such as rain or snow.
BACKGROUND ART
Wrapping machines using the heat-shrinkable film technique already exist, but have the drawback that they are able only to wrap a series of objects that all have the same dimensions.
DISCLOSURE OF THE INVENTION
Therefore, it is an object of this invention to provide a machine for the automatic protective wrapping, using heat-shrinkable plastic film, of objects fed to it in succession.
A more particular object of this invention is, by means of an automatic system, to obtain the protective wrapping of suitcases, handbags, sacks, packages and similar, of varying dimensions, by means of heat-shrinkable plastic film.
According to the invention, the machine is for the automatic protection of pieces of baggage having differing dimensions which includes, combination:
first conveyor means for moving forward, in succession, single pieces of baggage of different dimensions from the point of departure;
automatic bundling machine fed with the foregoing pieces of baggage coming from said first conveyor means, in a given direction of travel, and having a working surface with an input side;
second conveyor means associated to said working surface for said pieces of baggage;
tunnel-type oven equipped with a third conveyor means onto which said objects are transferred from the second conveyor means;
reception means, for said baggage pieces enclosed in said shrunk plastic film after having passed through said tunnel- type oven, situated at output side of said third conveyor means.
The bundling machine comprises: a sealing unit having a first transverse sealing bar and a respective counterbar situated on the input side of said working surface perpendicular to the direction of travel of said baggage and by a second, longitudinal sealing bar seat at right angles to the first, and a respective sealing counterbar situated on said working surface parallel to the direction of travel of said baggage; stand supporting a lower roll and an upper roll of heat-shrinkable plastic film, said film having a free end; a sheet consisting of said two films sealed at their free ends and positioned vertically through the slot between said first sealing bar and the input side of said working surface; first optic sensors for the detection of the longitudinal dimensions of the individual pieces of baggage for controlling the operation of said first sealing bar to carry out the seal at the rear of said wrapper, followed by the separation of the wrapper from the two free ends of said film and the
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Baggage Pack Italia S.p.A.
Culver Horace M.
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