GB2113646A - Apparatus for evacuating and sealing bags, sealable wrappers or similar items of packaging material with articles therein in a substantially gastight manner - Google Patents

Apparatus for evacuating and sealing bags, sealable wrappers or similar items of packaging material with articles therein in a substantially gastight manner Download PDF

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Publication number
GB2113646A
GB2113646A GB8301182A GB8301182A GB2113646A GB 2113646 A GB2113646 A GB 2113646A GB 8301182 A GB8301182 A GB 8301182A GB 8301182 A GB8301182 A GB 8301182A GB 2113646 A GB2113646 A GB 2113646A
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GB
Grant status
Application
Patent type
Prior art keywords
envelope
apparatus
chamber
packaging material
cover
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Withdrawn
Application number
GB8301182A
Other versions
GB8301182D0 (en )
Inventor
Wilhelm Kieteubl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
* SUPERVAC VERTRIEBSGESELLSCHAFT MBH KIETEUBL AND ASSLER oHG
SUPERVAC VERTRIEB GmbH
Original Assignee
SUPERVAC VERTRIEB GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING; SHOP CONVEYOR SYSTEMS; PNEUMATIC TUBE CONVEYORS
    • B65G69/00Auxiliary measures taken, or devices used, in connection with loading or unloading
    • B65G69/18Preventing escape of dust
    • B65G69/181Preventing escape of dust by means of sealed systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B31/00Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
    • B65B31/024Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for wrappers or bags

Abstract

Apparatus for evacuating and sealing bags 4 with articles 5 therein in a substantially gastight manner, comprises an evacuable chamber 8 for receiving a bag or bags or with an article therein, a device 10 for sealing the bag or bags, and a flexible envelope 12 located in the chamber. The envelope is filled with a gaseous medium such as air and expands when the surrounding pressure in the chamber is reduced thereby reducing the residual space within the chamber needing to be evacuated. <IMAGE>

Description

SPECIFICATION Apparatus for evacuating and sealing bags, sealable wrappers or similar items of packaging material with ar ticles therein in a substantially gastight manner The invention relates to apparatus for evacuating and sealing bags, sealable wrappers or similar items of packaging material with articles, for example foodstuffs, therein in a substantially gastight manner.

Foodstuffs, such as meat products, cheese, or similar products, and other articles, such as machine-components or industrial items, which are to be packaged in bags, sealable wrappers or similar items of packaging material in a substantially gastight manner, are conventionally placed in a chamber which is capable of being evacuated to, for example, approximately 99.8% of a pure vacuum whereupon the bags etc. are weld-sealed. Air is then admitted into the chamber and the hermetically packaged articles removed therefrom.

The expenditure of time required for one working cycle amounts to approximately 40 to 50 seconds, around 5 to 10 seconds being required for placing the open bags in the chamber and for removing the weld-sealed bags from the chamber, around 20 to 35 seconds for evacuating the chamber, and around 5 seconds for the remaining operations. Since a very high vacuum must be achieved, the time required for one working cycle, on the one hand, and its effectiveness, on the other hand, depend on the capability of a vacuum pump used to evacuate the chamber.

Since, however, the capability of the vacuum pump cannot be increased at will, since it would otherwise become too expensive in comparison with the entire apparatus, there is consequently an upper limit to the capability of the vacuum pump in relation to the apparatus in question.

In order to be able to reduce the space which must be evacuated and thereby to reduce the evacuation time and/or the necessary capacity of the vacuum pump, it is known to insert filler-bodies into the space in the chamber around the bags etc. which are filled with articles, especially foodstuffs. However, the use of filler-bodies is disadvantageous insofar as they need to be manipulated into place, even if the provision of other and/or different filler bodies is not necessary in the case of each evacuating operation, but only in the event of a change in the size of the article to be packaged.

The present invention seeks to provide an apparatus for evacuating and sealing bags, sealable wrappers or similar items of packaging material with articles therein in a substantially gastight manner, whereby, by substantially filling a space around the bags, sealable wrappers or similar items of packaging material, the effectiveness of a vacuum pump during an evacuating operation of the space is increased, without any requirement for manual effort.

According to the present invention there is provided an apparatus for evacuating and sealing bags, sealable wrappers or similar items of packaging material with articles therein in a substantially gastight manner, the apparatus comprising: an evacuable chamber for receiving at least one bag, sealable wrapper or similar item of packaging material with an article therein; means for sealing the at least one bag, sealable wrapper or similar item of packaging material; and an envelope located in the chamber, the envelope being filled with a gaseous medium and being expandable when the surrounding pressure in the chamber is reduced.

The mode of operation of the envelope located in the chamber is such that, as the chamber is evacuated, the gaseous medium contained in the envelope expands, as a result of which only the residual space inside the chamber which is not filled by the at least one bag, sealable wrapper or similar item of packaging material or by the expanded envelope need be evacuated, this residual space being markedly reduced by the expansion of the envelope. As a result a given vacuum pump can effect the evacuation of the residual space inside the chamber much more rapidly, or much more powerful evacuation can be achieved for the same effort.

In one embodiment, the chamber is defined by a supporting surface for the at least one bag, sealable wrapper or similar item of packaging material and by a cover which can be moved relative to the supporting surface, the envelope being retained by the cover.

The envelope may be formed by two approximately flat walls which are joined together along their outer edge.

In plan view, the envelope and cover may be approximately identical, the envelope being attached to the cover along a portion of its peripheral edge.

In one embodiment a body made of a resiliently deformable, porous material is located inside the envelope the space inside the envelope being connected to atmosphere by means of a valve. Thus, if the volume of gaseous medium contained in the envelope declines, as result of diffusion through the walls of the envelope, a predetermined volume of gaseous medium can be restored periodically. This is achieved by the body made of resiliently deformable porous material expanding to the size of the envelope when the interior space of the envelope is connected to the open atmosphere by the valve, thereby restoring the predetermined volume of air in the envelope.

In another embodiment, the envelope has approximately the shape and extent of the chamber, and contains a volume of gaseous medium which is significantly smaller than its volume in the expanded but substantially unstretched condition. Preferably the volume of gaseous medium contained in the envelope amounts to approximately 0.5% to 1% of the volume of air which is contained in the chamber at atmospheric pressure.

The invention is illustrated, merely by way of example, in the accompanying drawings, in which: Figure 1 shows, in section, one embodiment of an apparatus according to the present invention prior to the beginning of an evacuating operation; Figure2isaviewsimilarto Figure 1, ofthe apparatus at the end of the evacuating operation; Figure 3 shows a plan view of a gas-filled envelope of the apparatus; Figure 4 is an enlarged section along the line IV-IV in Figure 3; Figure 5shows, in section, another embodiment of an apparatus according to the present invention, priorto.the beginning of an evacuating operation; and Figure 6 is a view similar to Figure 5 of the apparatus at the end of the evacuating operation.

Throughout the drawings like parts have been designated by the same reference numerals.

Referring first to Figures 1 to 3, there is illustrated one embodiment of an apparatus 1 according to the present invention. The apparatus comprises a supporting surface 2 for holding articles or goods 5, especially foodstuffs, which are inserted into bags 4.

A cap or cover 3 is located above the supporting surface 2, this cover being movable relative to the - supporting surface 2. The cover 3 together with the supporting surface 2 define an evacuable chamber.

A line A indicates the plane along which the cover 3 can be raised clear of the remaining portion of the apparatus 1. Inside the cover 3 is a space 8 which is capable of being evacuated via a line 9 leading to a vacuum pump (not shown). Welding devices 10 are located in the space 8, for sealing, especialiy weldsealing, the bags 4 containing the goods 5, as soon as these bags have been evacuated.

A double-layer envelope 12 is located, by means of an attachment device 7, in the upper region of the cover 3, this envelope enclosing a plate or insert 13 manufactured from a foamed material, and thereby containing a predetermined volume of air. The envelope 12 and cover are approximately identical in plan view and the envelope is attached to an upper region of the cover 3 along a portion of its peripheral edge.

The mode of operation of the apparatus is as follows: After lifting off the cover 3, a plurality of bags 4, containing the goods 5, are placed on the supporting surface 2 with the open ends of the bags 4 on the lower beams of the welding devices 10. As soon as the apparatus has been filled, the cover 3 is placed in position, thereby closing the space 8, and the vacuum pump is set into operation. The space 8 is thus evacuated via the line 9. As a result of this evacuation, the envelope 12, which encloses a predetermined volume of air, expands, a substantial ly flat upper wall 15 of the envelope bearing against an inner surface 6 of the cover 3, and a substantially flat lower wall 16 coming into conformal contact with the bags 4, which are filled with the goods 5, and/or with the supporting surface 2.As a result of this expansion of the envelope, that part of the space 8 which must be evacuated is considerably reduced in size, thus enabling, in the case of given dimen sions of the chamber, the capacity of the vacuum pump to be reduced, and/or its effectiveness to be increased, and thus enabling the evacuating opera tion to be carried out in a shorter time.

Since the volume of air contained in the envelope 12 can decrease as a result of diffusion through the walls 15, 16 of the envelope 12, due to which effect it can no longer fulfil its assigned function with the regularity which is required, a simple measure is additionally taken, whereby the predetermined volume of air in the envelope can be restored. For this purpose, as can be seen from Figure 4, the envelope 12 has a valve 20. As soon as the volume of air contained in the envelope 12 requires replenishing, the valve 20 is opened, as a result of which the insert 13 expands and draws air into the envelope through the valve 20 thus ensuring that the predetermined volume of air is contained in the envelope. After closing of the valve 20, the apparatus is again completely serviceable.

As is evident from the above, an important feature resides in the fact that the envelope encloses a predetermined volume of air, as a result of which, although the envelope expands as the space 8 is evacuated, the pressure which the envelope exerts on the goods is limited, this being necessary in order to prevent the goods 5 contained in the bags 4 from being compressed too powerfully and/or to avoid any impediment to the evacuation of the bags.

Figures 5 and 6 illustrate another embodiment of apparatus according to the present invention. In this embodiment an envelope 22 possesses a shape and size approximating to the space 8. An accuratelymetered quantity of air is introduced into the envelope 22, by means of a graduated cylinder (not shown). The envelope 22, which is made from a completely gastight material, for example latex, is designed without a valve. In order to stabilise the envelope 22 when the cover 3 is removed, the envelope is provided, in its inner region, with a four-cornered frame 23. In addition, it has two rods 17, by means of which it is attached to the inner surface 6 of the cover 3 in a manner permitting easy removal.

When the cover 3 is removed, or prior to the beginning of the evacuating operation, the pressure of the air crumples or compresses the envelope 22.

As soon as the evacuating operation commences, the quantity of air contained in the envelope 22 becomes effective, thereby expanding the envelope 22. Thus an upper wall 25 of the envelope bears against the inner surface 6 of the cover 3, and a lower wall 26 comes into conformal contact with the bags 4 which are filled with goods 5 and/or against the supporting surface 2. As a result, that part of the space 8 which must be evacuated is considerably reduced in size. Since the quantity of air contained in the envelope 22 is accurately metered, pressure exerted by the envelope 22 on the bags 4 which might impede the evacuation of the bags 4, is reliably avoided. The envelope 22 has approximately the shape and extent of the chamber and contains a volume of air which is significantly smaller than its volume in its unstretched or substantially unstretch ed condition. The volume of air which is introduced into the envelope amounts to approximately 0.5% to 1% of the volume of the space 8 at atmospheric pressure.

Claims (8)

1. Apparatus for evacuating and sealing bags, sealable wrappers or similar items of packaging material with articles therein in a substantially gastight manner, the apparatus comprising: an evacuable chamber for receiving at least one bag, sealable wrapper or similar item of packing material with an article therein; means for sealing the at least one bag, sealable wrapper or similar item of packaging material; and an envelope located in the cham berth envelope being filled with a gaseous medium and being expandable when the surrounding pressure in the chamber is reduced.
2. Apparatus as claimed in claim 1 in which the chamber is defined by a supporting surface for the at least one bag, sealable wrapper or similar item of packaging material and by a cover which can be moved relative to the supporting surface, the envelope being retained by the cover.
3. Apparatus as claimed in claim 1 or 2 in which the envelope is formed by two approximately flat walls which are joined together along their outer edge.
4. Apparatus as claimed in claim 2 or claim 3 when dependent thereon in which in plan view, the envelope and cover are approximately identical, the envelope being attached to the cover along a portion of its peripheral edge.
5. Apparatus as claimed in any preceding claim in which a body made of a resiliently deformable, porous material is located inside the envelope the space inside the envelope being connected to atmosphere by means of a valve.
6. Apparatus as claimed in any of claims 1 to 4 in which the envelope has approximately the shape and extent of the chamber, and contains a volume of gaseous medium which is significantly smaller than its volume in the expanded but substantially unstretched condition.
7. Apparatus as claimed in claim 6 in which the volume of gaseous medium contained in the envelope amounts to approximately 0.5% to 1% of the volume of air which is contained in the chamber at atmospheric pressure.
8. Apparatus for evacuating and sealing bags, sealable wrappers or similar items of packaging material with articles therein in a substantially gastight manner substantially as herein described with reference to and as shown in the accompanying drawings.
GB8301182A 1982-01-22 1983-01-17 Apparatus for evacuating and sealing bags Withdrawn GB8301182D0 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT23082 1982-01-22
AT455082 1982-12-15

Publications (2)

Publication Number Publication Date
GB8301182D0 GB8301182D0 (en) 1983-02-16
GB2113646A true true GB2113646A (en) 1983-08-10

Family

ID=25591953

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8301182A Withdrawn GB8301182D0 (en) 1982-01-22 1983-01-17 Apparatus for evacuating and sealing bags

Country Status (4)

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DE (2) DE3300900A1 (en)
FR (1) FR2520324A1 (en)
GB (1) GB8301182D0 (en)
NL (1) NL8300145A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0434221A1 (en) * 1989-12-22 1991-06-26 W.R. Grace &amp; Co.-Conn. Vacuum packaging apparatus
ES2166656A1 (en) * 1999-04-08 2002-04-16 Univ Vigo System of air extraction for non-hermetically closed bags
WO2004067384A1 (en) * 2003-01-28 2004-08-12 Excel Corporation Positive-pressure fresh meat packaging system
WO2016135277A1 (en) * 2015-02-26 2016-09-01 Cryovac, Inc. Packaging apparatus with evacuation assembly and packaging process
EP3115304A1 (en) * 2015-07-10 2017-01-11 V-Zug AG Vacuum device with welded beam cover

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29500637U1 (en) * 1995-01-17 1995-02-23 Heymann Hans Helmut Apparatus for pressing material
EP3141487B1 (en) * 2015-09-14 2018-03-21 Miele & Cie. KG Vacuuming device and method and kitchen appliance and drawer device with a vacuuming device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1212492A (en) * 1958-10-17 1960-03-24 Soplaril Sa Improvements to machines for welding vacuo plastic packaging
CA934717A (en) * 1970-12-14 1973-10-02 W.R. Grace And Co. Vacuumizing and closing system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0434221A1 (en) * 1989-12-22 1991-06-26 W.R. Grace &amp; Co.-Conn. Vacuum packaging apparatus
US5088268A (en) * 1989-12-22 1992-02-18 W. R. Grace & Co.-Conn. Vacuum packaging apparatus
ES2166656A1 (en) * 1999-04-08 2002-04-16 Univ Vigo System of air extraction for non-hermetically closed bags
WO2004067384A1 (en) * 2003-01-28 2004-08-12 Excel Corporation Positive-pressure fresh meat packaging system
US7140167B2 (en) 2003-01-28 2006-11-28 Cargill, Incorporated Positive pressure fresh meat packaging system
WO2016135277A1 (en) * 2015-02-26 2016-09-01 Cryovac, Inc. Packaging apparatus with evacuation assembly and packaging process
EP3115304A1 (en) * 2015-07-10 2017-01-11 V-Zug AG Vacuum device with welded beam cover

Also Published As

Publication number Publication date Type
NL8300145A (en) 1983-08-16 application
DE8300736U1 (en) 1985-05-23 grant
DE3300900A1 (en) 1983-08-04 application
FR2520324A1 (en) 1983-07-29 application
GB8301182D0 (en) 1983-02-16 grant

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)