EP1520790A1 - Combined apparatus for sealed overwrapping, with tip-up flap shields - Google Patents
Combined apparatus for sealed overwrapping, with tip-up flap shields Download PDFInfo
- Publication number
- EP1520790A1 EP1520790A1 EP04104825A EP04104825A EP1520790A1 EP 1520790 A1 EP1520790 A1 EP 1520790A1 EP 04104825 A EP04104825 A EP 04104825A EP 04104825 A EP04104825 A EP 04104825A EP 1520790 A1 EP1520790 A1 EP 1520790A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring structure
- load
- hot
- operational position
- hood
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
- B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
- B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
- B65B53/066—Mobile frames, hoods, posts or the like
Definitions
- the present invention relates to an apparatus for the overwrapping of a load for the packaging industry, in particular a combined apparatus for the overwrapping of a load, i.e. wherein there are provided both means for picking up, opening and force-fitting an upturned bag or hood of heat-shrinkable plastic material on a load placed on a pallet, and also heating means to cause the heat-shrinking of said hood of plastic material.
- Such heating means are essentially hot-air generators (such as gas burners, or electric heaters installed along the perimeter of a quadrilateral ring structure, sized so as to encircle the load to be overwrapped and so as to be able to slide vertically therealong, thus evenly applying the heat sufficient to cause shrinking of the hood.
- hot-air generators such as gas burners, or electric heaters installed along the perimeter of a quadrilateral ring structure, sized so as to encircle the load to be overwrapped and so as to be able to slide vertically therealong, thus evenly applying the heat sufficient to cause shrinking of the hood.
- the ring of burners moves down to the bottom of the load, where the open edge of the hood is arranged, and it begins to heat (blowing out air as hot as 300°C) while slowly rising back up to the top of the hood.
- This procedure allows to achieve the best results: in fact, at the beginning, the free edge of the hood is heated which, shrinking, strongly adheres to the pallet lying underneath the load, thereby creating a fastening point for the hood itself; successively, also the upper portion of the hood progressively shrinks around the load and evenly stiffens it.
- the size of the combined overwrapping apparatus is suitably adjusted to the size of the largest load to be handled; this implies, in particular, that the ring structure carrying the hot-air generators be sized so that the outlet of such generators is at a distance, from the surface of the largest load to be overwrapped, which is sufficient to avoid the heat-shrinkable film of the wrapping hood being damaged by the hot air; on the other hand, such distance is to be fairly short in order to ensure correct heat-shrinking of the film even when a small-sized load is handled, the surface of which is at a certain distance from the generators.
- the perimeter size of the load may be subject to sensible variations. Should free flame burners be installed instead, only modest changes of the load perimeter size may be acceptable; the same can be said in case electric hot-air heaters are employed.
- the solution identified by the invention hence provides the use of deflector shields, which are capable of taking up at least two positions:
- the solution proposed by the invention may be used indifferently both when the ring structure is equipped with electric air heaters, and in the case that gas burners are provided; for this reason, reference is always made in the following of the description to hot-air generators, meaning by this term either one of the types indicated above.
- the ring structure consists of a quadrangular frame 1 and, on each of the four sides thereof, of a hot-air generator assembly 2.
- Each of these assemblies 2 comprises, in the illustrated case, a gas burner 3 fitted to one end and a blower 4 fitted to the other end to generate mixing air and to push said air towards the outlet nozzles 5 (see figures 2 to 4).
- deflector shields 7 are hinged onto shafts 6 running parallel to walls 2A of assemblies 2.
- Such shields 7 may be tipped from a non-operational position, visible in figures 3a and 3b, wherein they are arranged vertically, parallel to the vertical walls of the corresponding assemblies 2 (see better in fig. 3b), to a normal operational position, visible in figures 2a and 2b, wherein they are tipped down, in a sub-horizontal position, for example by about 105° to the vertical position, for the function better illustrated in the following.
- Figures 4a and 4b illustrate an intermediate operational position, wherein the shields are oriented horizontally, i.e. at 90° to the position of figures 2a and 2b.
- the tipping down movement of deflector shields 7 is preferably positively controlled by motor means (not shown in detail in the drawings) generally controlled by the apparatus; by this system it is possible to control tipping down of the deflector shields 7 in relation to the size of each load arriving at the wrapping station.
- motor means not shown in detail in the drawings
- such motor drive - which would increase costs - may be avoided by manually providing to tip down the deflector shields at the beginning of each sequence.
- the deflector shields 7 When the deflector shields 7 are tipped into an operational position (see figures 2 and 4), they intercept a peripheral area of the inner headroom of the ring structure, i.e. they resize such inner headroom proportionally to the minimum size of the loads to be overwrapped. More specifically, the distance between the opposite inner ends of the shields, in an operational position, is shown by (b) in figures 2 and 4, which is remarkably shorter than the distance (a), but in any case still greater than the plan size of minimum loads or loads slightly larger than minimum loads.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI20031892 ITMI20031892A1 (it) | 2003-10-02 | 2003-10-02 | Apparecchiatura incappucciatrice combinata, con scudi deflettori a ribaltamento. |
ITMI20031892 | 2003-10-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1520790A1 true EP1520790A1 (en) | 2005-04-06 |
Family
ID=34308117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04104825A Withdrawn EP1520790A1 (en) | 2003-10-02 | 2004-10-01 | Combined apparatus for sealed overwrapping, with tip-up flap shields |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1520790A1 (it) |
IT (1) | ITMI20031892A1 (it) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2082861A5 (en) * | 1970-03-25 | 1971-12-10 | Hurdequint Louis | Shrink-wrapping oven - drops over a pack to shrink the bag mouth uniformly using directional hot air jets |
DE8612337U1 (de) * | 1986-05-06 | 1987-08-13 | Möllers Maschinenfabrik GmbH, 4720 Beckum | Vorrichtung zum Heißschrumpfen einer Folie um einen zu verpackenden Gegenstand |
DE3732272A1 (de) * | 1987-09-25 | 1989-04-13 | Moellers Maschf Gmbh | Vorrichtung zum heissgasschrumpfen einer folie mit gasbrennern |
US5111528A (en) * | 1989-03-10 | 1992-05-05 | Msk-Verpackungs-Systems Gesellschaft Mit Beschrankter Haftung | Apparatus for heat shrinking wrapping using electrical air heating |
-
2003
- 2003-10-02 IT ITMI20031892 patent/ITMI20031892A1/it unknown
-
2004
- 2004-10-01 EP EP04104825A patent/EP1520790A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2082861A5 (en) * | 1970-03-25 | 1971-12-10 | Hurdequint Louis | Shrink-wrapping oven - drops over a pack to shrink the bag mouth uniformly using directional hot air jets |
DE8612337U1 (de) * | 1986-05-06 | 1987-08-13 | Möllers Maschinenfabrik GmbH, 4720 Beckum | Vorrichtung zum Heißschrumpfen einer Folie um einen zu verpackenden Gegenstand |
DE3732272A1 (de) * | 1987-09-25 | 1989-04-13 | Moellers Maschf Gmbh | Vorrichtung zum heissgasschrumpfen einer folie mit gasbrennern |
US5111528A (en) * | 1989-03-10 | 1992-05-05 | Msk-Verpackungs-Systems Gesellschaft Mit Beschrankter Haftung | Apparatus for heat shrinking wrapping using electrical air heating |
Also Published As
Publication number | Publication date |
---|---|
ITMI20031892A1 (it) | 2005-04-03 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
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AX | Request for extension of the european patent |
Extension state: AL HR LT LV MK |
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AKX | Designation fees paid | ||
REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20051007 |