US3882661A - Apparatus for bending the edge of a foil around the edge of a tray - Google Patents

Apparatus for bending the edge of a foil around the edge of a tray Download PDF

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Publication number
US3882661A
US3882661A US408111A US40811173A US3882661A US 3882661 A US3882661 A US 3882661A US 408111 A US408111 A US 408111A US 40811173 A US40811173 A US 40811173A US 3882661 A US3882661 A US 3882661A
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US
United States
Prior art keywords
tray
edge
foil
slide
stop plate
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
US408111A
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English (en)
Inventor
Eugen Schierle
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Individual
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Individual
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Filing date
Publication date
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Publication of US3882661A publication Critical patent/US3882661A/en
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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
    • B65B7/2842—Securing closures on containers
    • B65B7/285—Securing closures on containers by deformation of the closure

Definitions

  • ABSTRACT An apparatus for sealing trays with an aluminium foil, having a carrier plate for the tray which can be lifted and lowered with the tray and folding tools for bending that portion of the aluminium foil extending beyond the edges of the trays under the bent edge of the tray.
  • the folding tools comprise slides which can be moved against the tray from the outside and which are mounted or designed, and operate conjointly with closing brackets or other actuation means, in such a manner that, during the bending operation, the edges of the aluminium foil are first pressed against the tray from the outside and, during the final phase, are pressed into the hollow behind the edge of the tray from below. This ensures an especially secure, tight closure between foil and tray in one step.
  • the present invention relates to an apparatus for bending the edge of a foil of aluminium or a similar material around the edge of a tray, having a centering basket and a stop plate, which hold the tray and the foil between them and which can be advanced one toward the other, and further having slides which contact the edge of the foil from the outside as it bends during the advancing movement.
  • the object of the invention is to create an apparatus of the type indicated at the outset which ensures a dripproof sealing of the tray by means of the lid foil.
  • the centering basket has a closing bracket which is movable in the direction of advance and which contacts the slides, which are movable in the direction of advance, in the final position of the centering basket and the stop plate. This presses the slides against the stop plate to complete the sealing operation and tension the edge of the lid foil and the tray with one another to form a tight sea].
  • the slides are pivotally arranged about shafts which extend parallel to the edges of the tray.
  • This pivotal arrangement of the slides whose swivel shaft is located above the stop plate, has a favourable effect on the operation of bending the edges of the lid foil against the side walls of the tray, as the edges are pressed from the top to the bottom.
  • levers between a base plate and the stop plate which is in a movable supporting relationship with the base plate against the effect of one or more springs, with the levers supporting the slides by means of rod-like attachments located laterally next to the stop plate.
  • the plate-shaped slides In order to prevent the edge of the tray, which usually has an annular bead, from being destroyed during sealing, it is advantageous if the plate-shaped slides have a stem which engages behind an annular bead of the edge of the tray, thereby limiting pressing between the edges of the lid foil and the tray to a certain area.
  • the centering basket is kept in a supporting relationship with the closing bracket by means of one or more springs which are stronger than the springs which retain the stop plate. This ensures that the closing bracket is not moved until the centering basket and the stop plate have moved to their final position.
  • the stop plate In order to bend the edge of the lid foil as the tray and the lid foil which are held in the centering basket are pressed against the stop plate, it is advantageous if the stop plate has a recess corresponding to the size of the lid to be created.
  • FIGS. 1a and lb show a vertical section through an embodiment according to the invention in the initial position and in the closed position;
  • FIGS. 2a and 2b show a top view of lateral slides in the initial position and in the closed position.
  • trays 1 which are preferably of aluminium foil or a similar metallic foil, are to be sealed automatically with a foil 2, which is also an aluminium foil or another metallic foil.
  • Tray 1 and foil 2 are represented by dash-dotted lines.
  • Tray 1 has an outwardly projecting edge, which has an annular bead 3 on the outside.
  • Foil 2 is bent around annular bead 3 of this edge, whereby a dripproof closure should be achieved, as trays of this type are employed especially for the storage of prepared foods.
  • Filled tray 1 is placed in a centering basket 4 automatically by means of an unillustrated apparatus; the inclination of the side walls of centering basket 4 correspond to the inclination of the side walls of tray 1.
  • the corners of centering basket 4 have extensions 5, which are in a contacting relationship with the edge of tray 1 "mm the bottom.
  • Foil 2 is also placed on tray I auto: rnatically in an unillustrated manner.
  • the centering basket is lifted by means of a piston 6,
  • stop plate 7 has a recess S corresponding generally with the lid to be produced, so that the edge of foil 2 is bent :lownward around annular bead 3 when centering basket 4, containing tray 1, is pressed against stop plate 7.
  • Stop plate 7 is slidably arranged in a base plate 11 by means of a piston 9 against the effect of a spring 10,.
  • stop plate 7 can yield a given distance until it contacts its stop 12. This movement is transmitted to slides 14 in a lateral movement by means of levers 13 arranged between base plate 11 and stop plate 7.
  • Levers 13 which must be inclined relative to the direction of advance of centering basket 4, are mounted between stop plate 7 and base plate 11 in bearing blocks 15 and 16, with a slot guide being provided in bearing blocks 16 of base plate 11. Swivel shaft 17 of bearing blocks 15 extends vertically above the edges of tray 1 and parallel thereto.
  • Rod-like attachments 18 protrude downward from le- Slides 14 are movably attached to rod-like attach-.
  • section 26 is'set back relative to section with respect to the side walls of tray 1. Furthermore, only section 25 has a stemf21..,
  • slides 14 can be moved upward by means of a closing bracket 20 when centering basket 4 and stop plate 7 have reachedtheir end positions.
  • this swivels slides 14 upward above rod-like attachments 18. They engage behind bead 3 of the edge of tray 1 with a stem 21, and press the edge of foil 2, which is bent around bead 3, upward, thus producing a secure connection which is at least dripproof.
  • centering basket 4 is movably supported against piston 6 by means of bolts 22 and springs 23, while closing bracket 20 is connected directly with piston 6.
  • springs 23 must be at least so strong that they will only compress when spring 10 has compressed so far that stop 12 contacts stop plate 7. This can be ensured in a simple manner through the selection of suitable pre-tensions.
  • Closing bracket 20 is cross-shaped, so that it only contacts the center areas of slides 14 from below.
  • Base plate 11 is supported on rods 24. Of course, it is also quite possible to reverse the direction of travel, and to design centering basket 4 and closing bracket 20 stationary with base plate 11 and the other components of this assembly being advanceable.
  • FIGS. 2a and 217 there are four slides 14, which are associated to the side walls of tray 1.
  • the slides are divided into two independent sections 25 and 26, with section 25 associated to the straight area of the edges of tray 1 and each section '26 associatedtoa half corner areaonlysection 25 isimovably retained against rod-like attachments 18, in accordance with the representation according toFlGS. 1a and 1b, while section 26 is fixedly connected with rod-
  • sections 26 of the neighbouring slides 14 contact one another when the apparatus is. closed. They leave sufficient clearance to the corner of tray 1 for extensions, 5 of,
  • lid foil 2 can also be left on lid foil 2 in the corner areasythis permits advantageous opening of the trays by pulling these.
  • claim is: g 1.
  • stop plate means to permit limited displacement means in the first direction being effectedby the limited displacement of said stop plate means by saidcentering basket means, and a closing bracket means mov able with said centering basket means forcontacting said slide means to effect movement of said slide means I I in the. second direction after'said centering basketm means contacts said stop plate means.
  • said: means for mounting said slide means includes'lever means disposed at respective lateral edges of said stop plate means, said lever means extending between said base plate means and a respective lateral edge ofsaid stop plate means, and at least a pair of spaced shaft means for pivotally .mounting'the respective ends of said lever means, one of said pair of spaced shaft means being mounted at said stop plate member and the other a I of said pair of shaft means being mounted at said base.
  • each of said shaft means extending parallel to the edges of thetray.
  • said slide means includes a slide member
  • said attachment means includes a rod member mounted on said lever means, a stop shoulder provided at one end of said rod member, and spring means for normally urging said slide member toward said stop shoulder.
  • each of said slide means includes a first member extending substantially parallel to the straight edge portion of the tray and a second member contoured to a portion of the corner portions of the tray, said first member of each of said slide means being mounted to effect the successive movement in the first and second directions and said second member being fixedly mounted with respect to said first member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closing Of Containers (AREA)
  • Closures For Containers (AREA)
  • Basic Packing Technique (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
US408111A 1972-10-27 1973-10-19 Apparatus for bending the edge of a foil around the edge of a tray Expired - Lifetime US3882661A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2252927A DE2252927C2 (de) 1972-10-27 1972-10-27 Vorrichtung zum Verschließen von Schalen mit Aluminiumfolie o.dgl

Publications (1)

Publication Number Publication Date
US3882661A true US3882661A (en) 1975-05-13

Family

ID=5860284

Family Applications (1)

Application Number Title Priority Date Filing Date
US408111A Expired - Lifetime US3882661A (en) 1972-10-27 1973-10-19 Apparatus for bending the edge of a foil around the edge of a tray

Country Status (9)

Country Link
US (1) US3882661A (de)
AT (1) AT334828B (de)
BE (1) BE806591A (de)
CH (1) CH556768A (de)
DE (1) DE2252927C2 (de)
ES (1) ES196937Y (de)
FR (1) FR2204534B1 (de)
GB (1) GB1413567A (de)
IT (1) IT995985B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090133364A1 (en) * 2007-11-27 2009-05-28 William Michael Oliver Sealer and Interchangeable Tooling Therefor

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2511218C2 (de) * 1975-03-14 1982-12-09 Hunter Douglas International N.V., Willemstad, Curacao(Niederländische Antillen) Vorrichtung zum Verschließen eines mit einem waagerechten Randstreifen versehenen Behälters mit einem Deckel
US4293354A (en) * 1979-08-30 1981-10-06 Brown Company Process and machine for fastening a closure member to a container
US4301640A (en) * 1979-11-09 1981-11-24 Brown Company Container closing means and process
DE3263125D1 (en) * 1981-07-31 1985-05-23 Helmut Seidel Tool for closing one-way receptacles
DE3337683A1 (de) * 1983-10-17 1985-05-02 Alcan Ohler GmbH, 5970 Plettenberg Verfahren einer vorrichtung zum verschliessen eines durch ziehen einer plastisch verformbaren folie hergestellten behaelters mit einem deckel
ATE39894T1 (de) * 1985-07-23 1989-01-15 Wagner Wilhelm Wiwa Vorrichtung zum verschliessen von behaeltern.
DE102019218756A1 (de) * 2019-12-03 2021-06-10 Multivac Sepp Haggenmüller Se & Co. Kg Tiefziehverpackungsmaschine und Verfahren zum Betreiben einer Tiefziehverpackungsmaschine
DE102021126743A1 (de) * 2021-10-15 2023-04-20 BVM Brunner GmbH & Co. KG Seitenrandfalteinrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704628A (en) * 1955-03-22 stanton
US3036416A (en) * 1959-06-10 1962-05-29 Reynolds Metals Co Machine for wrapping a cover over a receptacle
US3224163A (en) * 1962-01-15 1965-12-21 Schjeldahl Co G T Package sealer
US3253380A (en) * 1961-12-20 1966-05-31 Reynolds Metals Co Machine and method for covering trays and the like
US3261144A (en) * 1962-01-31 1966-07-19 Reynolds Metals Co Apparatus for crimping a cover to an open end of a container or the like

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704628A (en) * 1955-03-22 stanton
US3036416A (en) * 1959-06-10 1962-05-29 Reynolds Metals Co Machine for wrapping a cover over a receptacle
US3253380A (en) * 1961-12-20 1966-05-31 Reynolds Metals Co Machine and method for covering trays and the like
US3224163A (en) * 1962-01-15 1965-12-21 Schjeldahl Co G T Package sealer
US3261144A (en) * 1962-01-31 1966-07-19 Reynolds Metals Co Apparatus for crimping a cover to an open end of a container or the like

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090133364A1 (en) * 2007-11-27 2009-05-28 William Michael Oliver Sealer and Interchangeable Tooling Therefor
US7614202B2 (en) * 2007-11-27 2009-11-10 Atlas Vac Machine Co., Llc Sealer and interchangeable tooling therefor

Also Published As

Publication number Publication date
IT995985B (it) 1975-11-20
FR2204534B1 (de) 1977-03-11
DE2252927C2 (de) 1974-10-31
DE2252927B1 (de) 1974-03-21
CH556768A (de) 1974-12-13
AT334828B (de) 1976-02-10
ES196937Y (es) 1975-08-16
DE2252927A1 (de) 1974-03-21
FR2204534A1 (de) 1974-05-24
GB1413567A (en) 1975-11-12
ES196937U (es) 1975-04-01
BE806591A (fr) 1974-02-15
ATA901473A (de) 1976-05-15

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