US3212468A - Container sealing method - Google Patents

Container sealing method Download PDF

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Publication number
US3212468A
US3212468A US285518A US28551863A US3212468A US 3212468 A US3212468 A US 3212468A US 285518 A US285518 A US 285518A US 28551863 A US28551863 A US 28551863A US 3212468 A US3212468 A US 3212468A
Authority
US
United States
Prior art keywords
flange
flange portion
container
foil
annular
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
US285518A
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English (en)
Inventor
Rychiger Hans
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.)
ALUPAK AG
Original Assignee
ALUPAK AG
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 ALUPAK AG filed Critical ALUPAK AG
Application granted granted Critical
Publication of US3212468A publication Critical patent/US3212468A/en
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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers

Definitions

  • This invention relates to a method for closing or sealing containers and in particular containers having a filling hole for .the commodity to be packed, the hole" having a rirn flange which can be covered by a closing material such as foil or film, preferably of a thin sheet material, such as light metal foil which may be saucer shaped or in ⁇ the form of a hollow shell.
  • a closing material such as foil or film, preferably of a thin sheet material, such as light metal foil which may be saucer shaped or in ⁇ the form of a hollow shell.
  • Such containers are frequently used for the preparation, transportation and display for sale of foodstuffs, e.g. rations ready for consumpti-on, cheesecake -or fruitcake ⁇ and the like, as well as presenting the food for eating.
  • the filling hole is frequently covered or sealed with a covering foil, e.g. of transparent synthetic material Ior light metal. Since several such containers are stacke-d one on top
  • a covering foil e.g. of transparent synthetic material Ior light metal.
  • covering foils may be anchored more easily to the rim flange of the container, if they a-re not very th-in. Since the material in questi-on is intended to be expendable, the thinnest possible covering materials are the most suitable economically.
  • -Th-e main object of the present invention is to provide .a reliable closure of containers even with very thin covering foils, e.g. of less than 0.05 mm. thickness, without adhesive, the covering foil for this purpose initially being set down firmly on the flat inner area of the rim flange.
  • a method for closing or sealing a filling perennial of a container made of thin sheet material along a rim flange extending around the orifice by means of a covering foil which .is initially laid firmly on a flat inner area of the flange the outer area of which forms an upright surround for the inner ilange area, characterised in that the outer flange area is swaged over inwards towards the covering foil and is then, with the edge of ⁇ the foil between itself and the .inner flange area bent downwards together with the two latter .and upset along the bending line in the form of a groove or channel, whereupon the still downwardly directed outer edge of the flange is upset by the comp-ression of material against the part of the flange exhibiting the fold.
  • the container is made of thin sheet material, whereof the filling hole is closed off by a covering foil sealed along a rim flange extending around said hole, the edge of the covering foil being held fast between two flange areas which together with the edge of the foil exhibit a surr-ounding fold in the form of a groove or channel, its outer edge being upset by the compression or squeezing together of material.
  • FIGURE 1 shows a cross section through a container sealing apparatus
  • FIGURES 2 to 5 show parts of the sealing elements of the apparatus in four different stages of the sealing operation
  • FIGURES 6 to 9 'sh-ow parts of the sealing elements of another construction of apparatus in four stages of the sealing operation.
  • a cup-like round container 1 preferably made of thin aluminium sheet, has an upper circular aperture 2 surrounded by a projecting rim flange, having an outer annular area 3 bent upwards initially at right angles around the remaining part of the flange forming a flat inner rim area 3", on which is placed a plane cove-ring f-oil 5 made of transparent synthetic material for example or light metal of less than 0.05 mm. thickness for example, and fitting into t-he surround 3.
  • the container 1 ready for sealing is moved over a table 6 on a carrying plate 7 of the sealing mechanism shown in FIGURE 1.
  • a push-rod 9 or the like guided in the lower part 8 of the mechanism is raised to lift a plate 10 replace- :ably secured thereto.
  • On the plate is disposed a co-axial thrust ring 11 urged to move axially with respect to the plate by compression springs 12 (FIGURE 2) so that its end face 113 engages against the underside of the flange area 3 simultaneously centring the container 1 by means of its inner tapered face 14.
  • the container 1 is lifted off the carrying plate 7 by the thrust rin-g 11 until the upper s-ide of the flange area 3" with the edge of a covering foil 5 resting thereon, engages .an annular edge 15 of an upper plate 16 which is repl-aceably secured co-axially to the lower plate 10 to a rod 18 axially guided in a sleeve 17 on the upper part 18 of the apparatus.
  • the covering foil 5 is held fast on the flange area 3 and the upright flange area 3 is raised into the pat-h of at least two beading or llanging rollers 21 which are each rotatably mounted in a bracket 23 with their axes of r-ot-ation 22 extending radially of the plate 16, the two brackets being secured radially displaceably in corresponding radial slots 24 of a V-belt pulley 25 mounted co-.axially with the sleeve 17 in the upper part 18 of the apparatus, t-o allow adjustment to different container sizes.
  • th-e beading rollers 21 circle around the plate 16 in diametrical disposition relative to each other.
  • the flange yarea 3 coming into contact with the revolving beading rollers 21, is inclined inwards (FIGURE 2) towards the covering foil S by the tapering peripheral faces 28 and 29 of said rollers.
  • the lower part of the flange .are-a 3 together with the edge lof the covering foil 5 and a part of the flange area 3, is bent over downwards, initially by the tapered faces 28 and 29 of the rollers 21 and subsequently, along the outer side of the thrust ring 11, by the end face 31 of the rollers roll-ing along the flange of the container, said end face extending radially beyond an annular projection 30 on the beading rollers 21, the edge of the covering foil thereby being clamped between the two flanges areas 3 and 3".
  • the flange part 3' is set upright again in doing so, and extends Iapproximately up to the roller projection 30 (FIG- URE 3), which now comes into operation wit-h Aits taperingly undercut peripheral surface 32 along the bending line of Ithe container flange and partially presses the latter into an annular groove 33 Ibeneath the bending line on the thrust ring 11, and simultaneously upsetting the upper edge of the flange part 3 thereby forming a groove or channel fold 34 (FIGURE 4) extending circumferentially in the flange of the container.
  • the plate 16 has now reached in top dead centre position, in which the upper end face 35 of the rod 19 bears against an axially adjustable abutment screw 36 (FIGURE 1).
  • the sealed c-ontainer is lowered lon to the carrying plate 7 and drawn out of the mechanism.
  • a -switch-ing system may be employed which keeps the motor in operati-on for a single stroke and return str-oke, after it has been switched on manually.
  • the plates yand 16 and the aforesaid components therewith are exchangeable in order to allow containers of different size to be sealed by means of the said apparatus.
  • Sealing the container 1 with the covering foil 5 may be effected by means of press rams instead of the beading rollers 21.
  • the two thrust rings 41 and 46 are retained wi-thout change the former being supported by spr-ings 42 on the machine bed 40.
  • the upper thrust ring 46 is surrounded by a co-axial .annular press ram 43 for example, opposed axially by a counter ring 49 supported res-iliently on springs 48 4and the upsetting ring 47, which co-axially to each other and to the lower thrust ring 41 surround the ring 41, Ion which the upsetting ring 47 is rigidly secured.
  • a method of sealing a lling opening of a container made of thin sheet material and having a flange surrounding the lopening and including an inner annular radially outwardly extending flange portion and an outer annular flange portion substantially normal thereto comprising the step-s of placing a covering foil over said opening and said inner tflange portion; swaging said outer flange portion inwardly towards said covering foil; bending said flange portions with 4a peripheral portion -of said foil located therebetween downwardly; ups-etting at least said inner flange portion and said peripheral portion of said foil into ⁇ an annular flange of substantially N-shaped cross section having an annular groove open at the top and an outer leg portion extending downwardly beyond the bottom of the groove; and compressing said outer leg portion and the outer ⁇ flange portion connected thereto in axial direction while pressing the free edge of said outer flange portion into said grooove.
  • a method of sealing a filling opening of a container made of thin sheet material and having a flange surrounding the opening and including an inner, flat, annular radially outwardly extending flange portion and an outer annular flange portion projecting from the outer periphery of said inner flange portion substantially normal thereto said method comprising the steps of placing a flat cover foil over -said opening and said inner flange portion with the outer periphery of said foil engaging said outer flange portion; clamping said inner flange portion in the region of the inner periphery thereof against said foil; swaging said outer flange portion inwardly towards said covering foil; bending said flange portions with a peripheral portion of said foil located vtherebetween downwardly; upsetting at least said inner flange portion and said peripheral portion of said foil int-o an annular flange of sub- 1 stantially N-shaped cross section having an annular groove open at the top and an outer leg portion extending downwardly beyond the bottom of the groove; and

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closing Of Containers (AREA)
US285518A 1962-06-05 1963-06-04 Container sealing method Expired - Lifetime US3212468A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH677862A CH403604A (de) 1962-06-05 1962-06-05 Verfahren und Vorrichtung zum Verschliessen eines aus Folienmaterial bestehenden Behälters sowie nach dem Verfahren geschlossener Behälter

Publications (1)

Publication Number Publication Date
US3212468A true US3212468A (en) 1965-10-19

Family

ID=4314877

Family Applications (1)

Application Number Title Priority Date Filing Date
US285518A Expired - Lifetime US3212468A (en) 1962-06-05 1963-06-04 Container sealing method

Country Status (5)

Country Link
US (1) US3212468A (de)
AT (1) AT250253B (de)
CH (1) CH403604A (de)
DK (1) DK108067C (de)
SE (1) SE314023B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3403649A (en) * 1963-11-29 1968-10-01 Fmc Corp Method of seaming metallic containers
US20080253863A1 (en) * 2004-01-16 2008-10-16 Heyn William M Angled Sealing Surface For Container End Panel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1995860A (en) * 1933-01-25 1935-03-26 C T Small Mfg Company Capping head
US2104224A (en) * 1935-01-31 1938-01-04 Int Patents Dev Co Can heading machine
US3070058A (en) * 1957-04-01 1962-12-25 Bendix Corp Process of manufacture for master cylinder filler caps
US3073480A (en) * 1960-11-02 1963-01-15 Continental Can Co Light weight metal double seam having easy opening features
US3083663A (en) * 1958-06-23 1963-04-02 Metal Box Co Ltd Manufacture of cans
US3108710A (en) * 1957-06-11 1963-10-29 Lange Karl Erwin Food can of synthetic material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1995860A (en) * 1933-01-25 1935-03-26 C T Small Mfg Company Capping head
US2104224A (en) * 1935-01-31 1938-01-04 Int Patents Dev Co Can heading machine
US3070058A (en) * 1957-04-01 1962-12-25 Bendix Corp Process of manufacture for master cylinder filler caps
US3108710A (en) * 1957-06-11 1963-10-29 Lange Karl Erwin Food can of synthetic material
US3083663A (en) * 1958-06-23 1963-04-02 Metal Box Co Ltd Manufacture of cans
US3073480A (en) * 1960-11-02 1963-01-15 Continental Can Co Light weight metal double seam having easy opening features

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3403649A (en) * 1963-11-29 1968-10-01 Fmc Corp Method of seaming metallic containers
US20080253863A1 (en) * 2004-01-16 2008-10-16 Heyn William M Angled Sealing Surface For Container End Panel
US8052367B2 (en) * 2004-01-16 2011-11-08 Heyn William M Angled sealing surface for container end panel

Also Published As

Publication number Publication date
SE314023B (de) 1969-08-25
AT250253B (de) 1966-11-10
CH403604A (de) 1965-11-30
DK108067C (da) 1967-08-14

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