US3832824A - Apparatus and method for evacuating packages - Google Patents

Apparatus and method for evacuating packages Download PDF

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Publication number
US3832824A
US3832824A US00375300A US37530073A US3832824A US 3832824 A US3832824 A US 3832824A US 00375300 A US00375300 A US 00375300A US 37530073 A US37530073 A US 37530073A US 3832824 A US3832824 A US 3832824A
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United States
Prior art keywords
chamber
bag
receptacle
evacuating
vacuum
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.)
Expired - Lifetime
Application number
US00375300A
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English (en)
Inventor
W Burrell
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.)
WR Grace and Co Conn
Original Assignee
WR Grace and Co
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
Application filed by WR Grace and Co filed Critical WR Grace and Co
Priority to US00375300A priority Critical patent/US3832824A/en
Priority to CA187,872A priority patent/CA980238A/en
Priority to GB133474A priority patent/GB1436471A/en
Priority to AR251944A priority patent/AR200902A1/es
Priority to ZA740320A priority patent/ZA74320B/xx
Priority to NLAANVRAGE7400964,A priority patent/NL173730C/xx
Priority to DE2404038A priority patent/DE2404038C2/de
Priority to CH128374A priority patent/CH570901A5/xx
Priority to BE140731A priority patent/BE810814A/xx
Priority to AU65563/74A priority patent/AU474917B2/en
Priority to IT48952/74A priority patent/IT1015830B/it
Priority to BR1671/74A priority patent/BR7401671A/pt
Priority to SE7403541-1A priority patent/SE414481B/xx
Priority to JP3108074A priority patent/JPS5414989B2/ja
Priority to DK219774AA priority patent/DK142491B/da
Priority to US480907A priority patent/US3928938A/en
Priority to FR7422716A priority patent/FR2235056B1/fr
Application granted granted Critical
Publication of US3832824A publication Critical patent/US3832824A/en
Assigned to W.R. GRACE & CO.-CONN, A CORP. OF CT reassignment W.R. GRACE & CO.-CONN, A CORP. OF CT MERGER (SEE DOCUMENT FOR DETAILS). MAY 25, 1988 Assignors: GRACE MERGER CORPORATION, W.R. GRACE & CO.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02—Filling, 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
    • B65B31/024—Filling, 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

Definitions

  • This invention relates to a method and apparatus for evacuating receptacles, especially impervious, flexible receptacles such as thermoplastic bags and pouces.
  • the invention has particular application in the vacuum packaging of fresh and frozen food products such as beef, poultry, ham, cheese, etc.
  • the present invention is a process of evacuating filled receptacles such as thermoplastic bags, pouches, and the like by placing the filled portion of the bag in a first vacuum chamber, extending the neck of the bag into a second and adjacent vacuum chamber, evacuating the first chamber thereby causing the bag to balloon outwardly away from the product; and, while said first chamber is being evacuated, evacuating the second chamber and, consequently, evacuating the interior of the ballooned bag; thereafter when evacuation of the bag is complete, elevating the pressure in the first chamber to collapse the bag firmly around the product and immediately closing the bag thereby making an evacuated package.
  • filled receptacles such as thermoplastic bags, pouches, and the like
  • the present invention is a process of evacuating and closing flexible, impervious receptacles such as pouches, bags, and the like which have at least one opening and certain at least one product, the process comprising the steps of confining the product containing a portion of the receptacle within a first region, confining a portion of the receptacle which contains the opening in a second region so that the interior of said receptacle is in communication with the second region through said opening of the receptacle, reducing the pressure within said first region and, subsequently, reducing the pressure within said second region so that the interior of the receptacle is evacuated, elevating the pressure in the first region, and, thereafter, closing the opening to make an evacuated package.
  • the present invention is an apparatus for evacuating and closing flexible, impervious receptacles such as pouches, bags, and the like which have at least one opening and contain at least one product and the apparatus comprises a first vacuum chamber with a second vacuum chamber adjacent to it and an aperture connecting the two chambers for passing the portion of the receptacle containing an opening therethrough.
  • Means to evacuate the first and second chambers and means to close the package when its evacuation is completed are included in the apparatus.
  • the closing means for the apparatus may be either a clip applying device or a heat seal apparatus located within one of the vacuum chambers.
  • FIG. 1 is a side elevational representation of a preferred apparatus according to the present invention in which the vacuum chambers of the apparatus are closed and a chamber wall is removed to show the interior arrangement;
  • FIG. 2 is a top plan view of the apparatus shown in FIG. 1 with both of said vacuum chambers open;
  • FIG. 3 is an isometric representation of a section of the lower portion of both of said vacuum chambers showing a filled package ready to be evacuated;
  • FIG. 4 is a representation in partial section showing the gathering arms of the preferred closing means of the preferred apparatus
  • FIG. 5 shows in partial section a clip being applied to a bag neck which has been gathered by the gathering arms shown in FIG. 4;
  • FIG. 6 shows the clip of FIG. being closed around the gathered bag neck as the clip is forced into the clip anvil
  • FIG. 7 is a sectional schematic side representation of the base of the vacuum chambers of the preferred embodiment showing the clip magazine and the clip punch and driving wheel;
  • FIG. 8 is a front elevational representation of the drive and timing wheel shown in FIG. 7.
  • Receptacle means any container for receiving an article or product to be packaged in the receptacle and includes bags and pouches.
  • Bag means a receptacle or container constructed from tubular stock by sealing one end of the tube.
  • a bag may be pleated or gusseted.
  • Pouch means a receptacle or container constructed from sheet stock.
  • a single or multiple sheets may be used; and, commonly a pouch may be made by folding a single sheet and sealing the free edges of the sheet together.
  • Aperture means a hole in a wall that may be of any shape and includes slot, oval, circular, rectangular, and irregular shaped holes.
  • An aperture may be formed by joining two wall sections that have indentations in, one or both of the surfaces so joined.
  • Vacuum means a pressure level lower than atmospheric pressure and may be expressed in 'lbs./sq.in. or in inches of Hg.
  • a high vacuum means a very low pressure level.
  • Heat shrinkable means that the particular material referred to will shrink upon the application of heat.
  • Heat scalable means that the particular material referred to can be welded to itself under the influence of temperature and pressure.
  • Opening in a receptacle means a passageway from the exterior of the receptacle to the interior; and, in the tus 1 receives the bag 9 filled with a product 8 and places the bag on the conveyor 14 and brings the neck of the bag down through the bag neck guide 13 and excase of a bag, the opening can be the bags mouth and the part of the bag containing the opening would -be the bags neck.
  • FIG. 1 is a side elevational representation with the side wall of the apparatus cut away so that the interior arrangement may be clearly seen.
  • FIG. 2 which is a top plan view of the apparatus of FIG. 1 with the hinged cover or head 3 being open.
  • the cover 3 is hinged to base member 2 which is divided by lower chamber divider wall 12 which cooperates with the upper divider wall 11 to separate apparatus 1 into the two chambers or regions 4 and 5.
  • the first and larger region or chamber 4 is the product chamber in which the portion of a bag or receptacle 9 containing a product 8 is placed on product conveyor 14.
  • the receptacle opening or bag neck is extended into the second and smaller region 5 which serves as the receptacle or bag evacuation chamber.
  • the second chamber 5 is evacuated through vacuum port 7 and the first chamber 4 is evacuated through vacuum port 6.
  • FIG. 3 the extension of the neck of bag 9 from the first chamber 4 into the second chamber 5 can be more clearly seen.
  • the recess 12a in the wall 12 forms the lower half of the aperture in the wall which divides chambers 4 and 5 and this aperture and wall is completed when the cover 3 is rotated into the position shown in FIG. 1 so that a corresponding recess in wall 11 forms the upper half of the divider wall aperture.
  • chamber 4 begins through vacuum port 6. Any conventional vacuum pump which is well known in the art may be used and be connected to vacuum port 6 to evacuate chamber 4. As vacuum is applied the chamber will be evacuated very rapidly, in the order of 2 to 3 seconds to a low level of pressure or around 27 inches of Hg. and further reduction in pressure takes a significantly longer period of time.
  • the bag neck sufficiently fills the aperture between chambers 4 and 5 so that very little air is leaked from the second region 5 into the first region 4 during this phase of evacuation. In this initial phase, the bag 9 will balloon outwardly as shown by dotted lines 10 because of the difference in pressure between the interior of the bag 9 and the chamber 4.
  • FIG. 4 is a view in partial section looking along the direction of lines 4-4 of FIG. 3. This view is from between walls 18a and 18b of the lower gathering arm guide track 18 and between walls 17a and 17b of the upper gathering arm track 17.
  • bag neck 9a is shown partially compressed between the bag neck guide 13 and walls 17a and 18a. Gathering arms move inwardly towards each other to further compress the bag neck 8 into the shape shown in FIG. 5. As the gathering arms 25 have moved more closely together to wedge the bag neck 9a into a smaller space, plunger 24 drives clip 37 up around the gathered bag neck9a and forces the clip towards anvil 19.
  • Cutter arm 26 is driven upwardly through cutter housing 22 to sever the excess bag neck material and the drive means for cutter arm 26 is not shown but may be a pneumatically operated cylinder or an electrically driven solenoid, both of which drive means are well known in the art.
  • An alternate method and means for closing a package or bag after evacuation is toremove the bag neck guide 13 shown in FIG. 3 and widen the aperture opening 12a to correspond to the width of the flattened bag neck.
  • the clip applying means may be eliminated in this alternate closure means and a sealing bar may be substituted for the blade 27 with the sealing bar being the same width as the aperture 12a.
  • Bar 27 may be electrically resistance heated and a pressure backing member may be substituted for the cutter track 38 as shown in FIG. 6 so that when the arm 26 is driven upwardly after the evacuation of the bag the heated bar 27 will contact the flattened bag neck 9a and press same against the pressure backing member 38.
  • the bar would dwell sufficiently long in its position of pressing the bag neck against the backing member 38 until the bag is sealed to itself.
  • the bag material must be of a type that will weld to itself under the influence of heat and the thermoplastic material such as polyethylene, ethylene vinyl acetate copolymers, saran, and the like with the appropriate coatings and surface treatments are suitable for this purpose.
  • FIG. 8 is a frontal view of the plunger drive wheel 28 which is driven by pinion 36 which, in turn, is driven by a conventional electrical motor which is not shown.
  • Crank pin is connected to plunger crank 29 and at the beginning of each cycle crank pin 35 is at bottom dead center of the wheel. The time represented by t, is
  • timing cams may be placed on shaft 31 on which wheel 28 is mounted and these cams can be used to control such functions as the venting of the chambers to atmosphere as the clipping and cutting cycle is completed.
  • FIGS. 1-8 a semi-automatic operation of the foregoing described apparatus according to the process of the present invention will be described.
  • valves, cams, a timer, vacuum pump, pressure sensor, etc. are mentioned. None of these are shown in the drawings and each is a conventional item whose use and application is familiar to those skilled in the packaging machinery arts.
  • the packaging cycle begins when the operator manually places a filled bag into first chamber 4 and extends the neck into second chamber 5. The operator then closes the chambers with cover 3 and the closing actuates a microswitch which starts a timer and opens the valve to port 6 so that a vacuum pump can evacuate chamber 4.
  • the evacuation of the second chamber is started by the timer opening the valve connecting port 7 with the vacuum pump. During this time ballooning of the bag 9 to shape 10 will have occurred.
  • a preset level preferably about 26 or 27 in. Hg., a pressure sensor .in the first chamber shuts off the vacuum in the first chamber and simultaneously sends a signal through a delay timer to the electric drive motor for pinion 36.
  • the timing and drive wheel 28 is at the position shown in FIG. 8 with the crank pin at bottom dead center.
  • the timed signal can be preset for any given duration and is preferably about 1% seconds which means that wheel 28 will start to make one complete revolution at the end of that preset period'of time.
  • Timing cams are located on the supporting shaft or axle 31 of wheel 28 and as wheel 28 rotates in a counterclockwise manner (FIG. 8) one of the cams will actuate a valve causing the first chamber to vent to atmosphere prior to reaching time span Venting the first chamber to atmosphere causes the bag 9 to collapse or, rather, be violently pushed against the product since the bag interior is at the pressure level of the second chamber which now will have reached lower than 28 in. Hg. This violent collapsing of the bag drives out any residual air in.
  • the present invention is not limited to bags and pouches but can be applied generally to any receptacle whose walls will flex outwardly under the influence of a pressure differential and will conform to a wall aperture.
  • the shape of the wall aperture may be made to conform to the shape of the receptacle opening and to the closing and sealing method desired.
  • One particularly desirable package results from the process and apparatus of this invention when a meat or poultry product is enclosed in a heat shrinkable, essentially gas impervious, thermoplastic bag.
  • the package is passed through either a hot water bath or through a hot air tunnel to shrink and further tighten the bag material around the product.
  • Te tight grip of the shrunken material protects 'the product from pinhole leakage because the material is so firmly pressed against the product that even when a hole or cut occurs the hole is essentially sealed by the adjacent or exposed portion of the product so that no air can enter the package.
  • a process of evacuating and closing flexible, impervious receptacles such as pouches, bags and the like which have at least one opening and contain at least one product comprising the steps of:
  • thermoplastic bag having a neck and a mouth which is the single opening to said bag and including the steps of:
  • An apparatus for evacuating and closing flexible, impervious receptacles such as pouches, bags and the like which have at least one opening and contain at least one product comprising:
  • aperture means connecting said chambers for passing the portion of said package containing an opening therethrough;
  • e. means to close said receptacle when its evacuation is completed.
  • the apparatus of claim S including means to vent said chambers to atmosphere independent of each other.
  • An apparatus for evacuating receptacles into which a product has been loaded comprising:
  • closing and sealing means includes gathering means and clip applying means.
  • An apparatus for evacuating filled receptacles such as bags, pouches, and the like comprising:
  • a base member divided into first and second chamber bases by a lower wall, said first chamber base being larger than said second;
  • thermoplastic bag and said package closure means includes:
  • clip applying means to apply a clip to said gathered bag neck

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vacuum Packaging (AREA)
  • Package Closures (AREA)
  • Packages (AREA)
US00375300A 1973-06-29 1973-06-29 Apparatus and method for evacuating packages Expired - Lifetime US3832824A (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
US00375300A US3832824A (en) 1973-06-29 1973-06-29 Apparatus and method for evacuating packages
CA187,872A CA980238A (en) 1973-06-29 1973-12-11 Apparatus and method for evacuating packages
GB133474A GB1436471A (en) 1973-06-29 1974-01-11 Evacuation method and apparatus and evacuated package
AR251944A AR200902A1 (es) 1973-06-29 1974-01-15 Procedimiento para evacuar y cerrar un receptaculo flexible impermeable, y un aparato para llevar a la practica dicho procedimiento
ZA740320A ZA74320B (en) 1973-06-29 1974-01-16 Evacuation method and apparatus
NLAANVRAGE7400964,A NL173730C (nl) 1973-06-29 1974-01-24 Apparaat voor het vacuuemverpakken van een voorwerp.
DE2404038A DE2404038C2 (de) 1973-06-29 1974-01-29 Vorrichtung zum Vakuumverpacken eines Produkts in einem flexiblen Behälter
CH128374A CH570901A5 (de) 1973-06-29 1974-01-30
BE140731A BE810814A (fr) 1973-06-29 1974-02-08 Procede et appareil a faire le vide
AU65563/74A AU474917B2 (en) 1973-06-29 1974-02-13 Evacuation method and apparatus and evacuated package
IT48952/74A IT1015830B (it) 1973-06-29 1974-03-04 Metodo ed apparecchiatura di evacuazione di contenitori in particolare contenitori imper meabili e flessibili
BR1671/74A BR7401671A (pt) 1973-06-29 1974-03-07 Processo e aparelho para evacuacao e fechamento de um receptaculo flexivel impermeavel
SE7403541-1A SE414481B (sv) 1973-06-29 1974-03-15 Foerfarande och anordning foer vakuumpaketering av en produkt i en flexibel behallars
JP3108074A JPS5414989B2 (de) 1973-06-29 1974-03-20
DK219774AA DK142491B (da) 1973-06-29 1974-04-22 Fremgangsmåde og apparat til vakuumemballering af et produkt i en fleksibel beholder.
US480907A US3928938A (en) 1973-06-29 1974-06-19 Method for evacuating packages
FR7422716A FR2235056B1 (de) 1973-06-29 1974-06-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00375300A US3832824A (en) 1973-06-29 1973-06-29 Apparatus and method for evacuating packages

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US3832824A true US3832824A (en) 1974-09-03

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US00375300A Expired - Lifetime US3832824A (en) 1973-06-29 1973-06-29 Apparatus and method for evacuating packages

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US (1) US3832824A (de)
JP (1) JPS5414989B2 (de)
AR (1) AR200902A1 (de)
AU (1) AU474917B2 (de)
BE (1) BE810814A (de)
BR (1) BR7401671A (de)
CA (1) CA980238A (de)
CH (1) CH570901A5 (de)
DE (1) DE2404038C2 (de)
DK (1) DK142491B (de)
FR (1) FR2235056B1 (de)
GB (1) GB1436471A (de)
IT (1) IT1015830B (de)
NL (1) NL173730C (de)
SE (1) SE414481B (de)
ZA (1) ZA74320B (de)

Cited By (31)

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US3928938A (en) * 1973-06-29 1975-12-30 Grace W R & Co Method for evacuating packages
US3965646A (en) * 1975-02-26 1976-06-29 W. R. Grace & Co. Adjustable sealing device
US4085231A (en) * 1976-10-08 1978-04-18 W. R. Grace & Co. Container evacuation process
US4132048A (en) * 1976-03-29 1979-01-02 Day Timothy T Vacuum packaging bulk commodities
US4189897A (en) * 1978-11-01 1980-02-26 Acraloc Corporation High speed evacuation chamber packaging and clipping machine
US4335559A (en) * 1979-12-04 1982-06-22 Union Carbide Corporation Dual pressure closure clipping system for chamber evacuator
EP0077458A1 (de) * 1981-10-16 1983-04-27 W.R. Grace & Co. Verfahren und Vorrichtung zum Vakuumverpacken
US4478025A (en) * 1981-08-31 1984-10-23 Scanlan Gregory P Vacuum packing device
US4534984A (en) * 1983-08-16 1985-08-13 W. R. Grace & Co., Cryovac Div. Puncture-resistant bag and method for vacuum packaging bone-in meat
US4583347A (en) * 1982-10-07 1986-04-22 W. R. Grace & Co., Cryovac Div. Vacuum packaging apparatus and process
US4600927A (en) * 1984-03-30 1986-07-15 Canon Kabushiki Kaisha Method of preserving ink jet recording head
US4926614A (en) * 1986-11-05 1990-05-22 Rmf Steel Products Co. Packaging method and apparatus
US5056292A (en) * 1989-05-18 1991-10-15 Multivac Sepp Haggenmuller Kg Vacuum chamber packaging machine
US5062252A (en) * 1990-08-08 1991-11-05 Viskase Corporation Vacuum packaging method and apparatus
US5692360A (en) * 1995-01-13 1997-12-02 W. R. Grace & Co.-Conn. System and method for packaging products
US5784862A (en) * 1995-01-27 1998-07-28 Germano; Maina Device for the packing under vacuum of products contained in flexible bags
US6430901B1 (en) * 1998-09-16 2002-08-13 Philippe Domansky Method and device for opening and filling pre-manufactured bag packages
US20040139701A1 (en) * 2003-01-16 2004-07-22 Cady Derril R. Bag sealing system and method
US20040144063A1 (en) * 2003-01-28 2004-07-29 Countz John W Positive pressure fresh meat packaging system
US20050022473A1 (en) * 2003-07-31 2005-02-03 Small Steven D. Removable drip trays and bag clamps for vacuum packaging appliances
US20050050855A1 (en) * 2003-02-27 2005-03-10 Baptista Alexandre A. N. Vacuum packaging appliance with removable trough
EP1564147A1 (de) * 2004-02-13 2005-08-17 Cryovac, Inc. Verfahren und Vorrichtung zum Vakuumverpacken
US20080095902A1 (en) * 2006-10-18 2008-04-24 George Cheung Marinating device
US7464522B2 (en) 2003-07-31 2008-12-16 Sunbeam Products, Inc. Vacuum packaging appliance
US7478516B2 (en) 2003-07-31 2009-01-20 Sunbeam Products, Inc. Vacuum packaging appliance
US20090260326A1 (en) * 2008-04-18 2009-10-22 Multivac Sepp Haggenmueller Gmbh & Co. Kg Method and device for packaging of bulk goods in bags
DE102010055438A1 (de) * 2010-12-21 2012-06-21 Multivac Sepp Haggenmüller Gmbh & Co. Kg Verpackungsmaschine und Verfahren zum Erzeugen einer Vakuumverpackung
US20140123599A1 (en) * 2011-07-12 2014-05-08 Thomas Gustafsson Packaging apparatus and method of expelling gas
WO2018091655A1 (en) * 2016-11-18 2018-05-24 Cryovac, Inc. Process and apparatus for evacuation of packages
CN108869297A (zh) * 2018-07-20 2018-11-23 北京电子工程总体研究所 一种大型多环柔性囊体的折叠收纳装置
EP3771651A1 (de) * 2019-08-01 2021-02-03 Immobles del Segria, S.L. Detektionssystem und detektionsverfahren zur detektion der betätigung eines deckels in einer vakuumverpackungmaschine

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EP0039120B1 (de) * 1980-04-29 1984-03-07 Brdr. Schur International A/S Verfahren und Vorrichtung zum Schliessen von Verpackungsbeuteln für geschlachtetes Geflügel
ZA813186B (en) * 1980-06-25 1982-05-26 Grace W R & Co Packaging process and apparatus
IE52224B1 (en) * 1981-03-18 1987-08-19 Grace W R & Co Packaging process and apparatus
IE52250B1 (en) * 1981-03-18 1987-08-19 Grace W R & Co Process and apparatus for providing a sealing package
US4578928A (en) * 1983-07-06 1986-04-01 Acraloc Corporation High speed evacuation chamber packaging machine and method
DE3411917A1 (de) * 1984-03-30 1985-10-03 Multivac Sepp Haggenmüller KG, 8941 Wolfertschwenden Verfahren und vorrichtung zum verpacken von gegenstaenden
DE8916006U1 (de) * 1989-06-29 1992-12-17 Fahr-Bucher Gmbh, 7702 Gottmadingen Vorrichtung zum Lösen von Verpackungsfolie von klebrigen Massen
JPH0370712A (ja) * 1989-08-09 1991-03-26 Toshiomi Suzuki 交通利用カード及び交通利用システム
CN107985694B (zh) * 2017-12-30 2023-11-10 浙江圣利机械设备有限公司 一种包装机的封切装置
DE102020122101A1 (de) * 2020-08-25 2022-03-03 Miele & Cie. Kg Vakuumiergerät zum Verschließen eines flexiblen Behälters sowie flexibler Behälter mit Verschlusselement sowie Verfahren zum Betreiben eines Vakuumiergeräts

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Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928938A (en) * 1973-06-29 1975-12-30 Grace W R & Co Method for evacuating packages
US3965646A (en) * 1975-02-26 1976-06-29 W. R. Grace & Co. Adjustable sealing device
DE2558733A1 (de) * 1975-02-26 1976-09-09 Grace W R & Co Einstellbare dichtungsvorrichtung sowie verbessertes verfahren und vorrichtung zum evakuieren von gefaessen
US4132048A (en) * 1976-03-29 1979-01-02 Day Timothy T Vacuum packaging bulk commodities
US4085231A (en) * 1976-10-08 1978-04-18 W. R. Grace & Co. Container evacuation process
US4189897A (en) * 1978-11-01 1980-02-26 Acraloc Corporation High speed evacuation chamber packaging and clipping machine
US4335559A (en) * 1979-12-04 1982-06-22 Union Carbide Corporation Dual pressure closure clipping system for chamber evacuator
US4478025A (en) * 1981-08-31 1984-10-23 Scanlan Gregory P Vacuum packing device
US4922686A (en) * 1981-10-16 1990-05-08 W. R. Grace & Co. Vacuum packaging method
EP0077458A1 (de) * 1981-10-16 1983-04-27 W.R. Grace & Co. Verfahren und Vorrichtung zum Vakuumverpacken
US4583347A (en) * 1982-10-07 1986-04-22 W. R. Grace & Co., Cryovac Div. Vacuum packaging apparatus and process
US4534984A (en) * 1983-08-16 1985-08-13 W. R. Grace & Co., Cryovac Div. Puncture-resistant bag and method for vacuum packaging bone-in meat
US4600927A (en) * 1984-03-30 1986-07-15 Canon Kabushiki Kaisha Method of preserving ink jet recording head
US4926614A (en) * 1986-11-05 1990-05-22 Rmf Steel Products Co. Packaging method and apparatus
US5056292A (en) * 1989-05-18 1991-10-15 Multivac Sepp Haggenmuller Kg Vacuum chamber packaging machine
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ZA74320B (en) 1974-11-27
DK142491B (da) 1980-11-10
DE2404038A1 (de) 1975-01-23
NL173730B (nl) 1983-10-03
AR200902A1 (es) 1974-12-27
DE2404038C2 (de) 1987-03-26
FR2235056B1 (de) 1980-04-11
AU6556374A (en) 1975-08-14
GB1436471A (en) 1976-05-19
FR2235056A1 (de) 1975-01-24
NL173730C (nl) 1984-03-01
SE414481B (sv) 1980-08-04
BE810814A (fr) 1974-05-29
BR7401671A (pt) 1975-11-11
CH570901A5 (de) 1975-12-31
JPS5414989B2 (de) 1979-06-11
AU474917B2 (en) 1976-08-05
JPS5021880A (de) 1975-03-08
CA980238A (en) 1975-12-23
IT1015830B (it) 1977-05-20
SE7403541L (de) 1974-12-30
DK142491C (de) 1981-07-20
DK219774A (de) 1975-02-10
NL7400964A (de) 1974-12-31

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