Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
  • B65D77/10—Container closures formed after filling
  • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
  • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
  • B65D77/2068—Means for reclosing the cover after its first opening
  • B65D77/2072—Mechanical means
  • B65D77/2076—Mechanical means provided by the cover itself
  • B65D77/2084—Mechanical means provided by the cover itself the cover being maintained reclosed by a part folded over the container rim
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
  • B65D77/10—Container closures formed after filling
  • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
  • B65D77/2004—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being maintained on the container by mechanical means, e.g. crimping, clamping, riveting
  • B65D77/2012—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being maintained on the container by mechanical means, e.g. crimping, clamping, riveting the cover being crimped or folded over the container flange

Definitions

• the invention relates essentially to a device for manufacturing covers and attaching them to attached trays.
• the main object of the present invention is to solve the new technical problem consisting in the supply of a solution which makes it possible to produce and manufacture a device forming a cover intended to come to cover in a substantially complete way an opening of a packaging container.
• thermoformer base 3 o products such as food products, on a packaging machine, more particularly on a thermoformer base
• the present invention relates to a cover device intended to come to cover substantially completely an opening of a container for packaging products such as food products, characterized in that said device is made of thermoformable material and manufactured by thermoforming with securing means comprising at least one lateral zone intended to be secured with a corresponding lateral zone of an edge of said container in order to constitute a pivot hinge of the device forming a lid for opening or closing the opening of the container.
• the invention relates to a device characterized in that the aforementioned securing means comprise at least on certain edges of the device forming a cover, one or more latches or gadroons radially projecting inside the device forming a cover , so as to lock the closed device 5 on the packaging container in the closed position
• the invention relates to a device characterized in that the aforementioned lateral zone comprises a tongue projecting outwards relative to the edge of the cover device; this tongue being preferably of sufficient length to be able to be folded down and applied to the corresponding lateral zone of the container opposite the cover device, thereby facilitating the pivoting of the cover device on said container.
• the aforementioned tongue may extend over all or part of the width of said cover device. 5
• this device is characterized in that it comprises a fold line at the junction between said tongue and the body of said device.
• the invention relates to a device characterized in that the lateral zone for securing the preform o, when it is not provided with a tongue, can also comprise a fold line thus facilitating pivoting of the device forming a lid on said container
• this device is characterized in that it is manufactured by thermoforming, then undergoes a precut, then fixing on container and finally cutting and this from a film of thermoformable material, preferably of thermoformable plastic material.
• the invention provides a method of manufacturing a cover device intended to cover substantially
• thermoforming means more particularly preferably on a thermoforming frame, a) the unwinding of a film of thermoformable material from a reserve or roll of film b) the production of preforms of devices forming a cover, with or without a tongue, with or without a fold line, by means of thermoforming so as to produce successive preforms on said film intended to constitute said cover devices with transverse separation zones
• thermoforming film being of width greater than the intended width of the cover devices, so as to constitute longitudinal areas of junction between the various preforms and serving to hold and advancement of the film, said devices being preformed by thermoforming with means of
• thermoform preforms of devices forming a container or tray provided or not with a fixing or securing tab and benefiting from all the characteristics and advantages of the preforms of devices forming covers. described further on and in this case the covers would be attached either with or without a tab.
• thermoform a zone or folding means of fixing or joining such as the tongue, not to cut the assembly lateral side and longitudinal side of the preforms of said device forming a cover, that at the outlet of
• the invention it is possible to cover substantially completely any opening of a container for packaging products, more particularly food products, in a simple, inexpensive and usable on an industrial and commercial scale.
• the invention allows to obtain on the container-cover assembly a more or less perfect seal as required and at the same time protection of the assembly and a new and better presentation.
• thermoforming machine specially adapted and modified to produce and manufacture cover devices according to the invention provided with attached and fixed trays;
• FIG. 2 shows a top view of a film of thermoformable material in the machine of Figure 1, provided with i o thermoforming means, after thermoforming of successive preforms;
• FIG. 3 shows a top view of successive preforms whose transverse areas of separation between the preformed devices have been cut
• FIG. 4 shows a top view of the preforms obtained 1 after precut of Figure 3 and on which were embedded the product packaging containers, preferably containing food products;
• FIG. 5 shows a sectional view along the section line V-V of Figure 4.
• FIG. 6 represents a top view of the preforms, the cover forming devices of which are embedded and secured to the containers and showing the operation of cutting, by the dotted lines 48, the longitudinal zones 26 serving for maintaining and advancing the film 14, therefore devices;
• FIG. 8 shows the packaging containers A finished, but whose zones or means for fixing the device forming covers without tabs benefit from a fold line 47, thus allowing it to pivot during opening;
• FIG. 9 shows the packaging containers A finished, but fixed and secured to the devices forming covers by their own folding tab 49 with a fold line 50 intended to form the hinge 51 naturally and bagged in the devices 22 forming covers which do not therefore have a folding tongue 32.
• thermoformer chassis transformed and adapted according to the invention represented by the general reference number 10 comprising:
• thermoforming station 20 for unwinding a film 14 of thermoformable material, for example of a thermoformable plastic material such as PVC, polyethylene, polypropylene, or composite films combining several layers of films of different nature, from a reserve or a roll of film 16, 0 - a station 20 for thermoforming of preforms 22a of the devices forming covers 22 which can be seen clearly from FIG. 2, with transverse zones 24 of separation, precut 24 and longitudinal areas 26 of junction used to maintain and advance the film maintained by the drive chains 28 and to maintain the film 14 5 -
• the thermoforming station 20 produces preforms 22a of the devices 22 by thermoforming with zones or means 30 for securing with a container that can be seen clearly from FIG. 4, such as a tray A
• these securing means 30 o comprise at least one lateral zone 32 intended to allow securing with a corresponding lateral zone 40, clearly visible in FIG. 5, of an edge 42 of the container A, to constitute a pivot hinge of the device forming a cover 22 for opening or closing the opening 44 of the container A, as is well conceived from the preform 22a in FIG. 5.
• a tab can also be avoided if the edge 23 is of width sufficient, to allow a solid and durable connection with a corresponding edge of the container possibly with a fold zone 34,47 on this edge so as to constitute a pivoting hinge.
• a station 90 for evacuating the containers A provided with lids 22, and for eliminating cutting residues.
• the preforms 22a here preferably comprise a tongue 32 projecting outwards relative to the edge 23 concerned of the device forming a cover 22.
• This tab or rim may be substantially of the same dimension as the corresponding lateral zone 40 provided on an edge 42 of the container A so as to directly constitute a hinge 46 for pivoting the device forming cover making it possible to open or close the opening 44 of the container with a fold line 34,
• the tongue 32 is of sufficient length to be radially projecting outwards relative to the lateral zone concerned 40 of the container A in order to be able to be folded down on the other side of this zone 40, as this is understandable from the consideration of figure 5
• thermoforming station 20 can also provide during thermoforming in the thermoforming station 20 a fold line 34, clearly visible in Figure 2, at the junction between the lateral zone 30, preferably the tongue 32, and the body of the defined device by the edge 23.
• the lateral zone preferably the tongue 32, extends only over a part of the width of the device forming a cover, as clearly visible in Figures 2.3.4.
• this lateral joining zone 30, preferably the tongue 32 can extend over the entire width of the device forming a cover.
• thermoforming station 20 also realizes as securing means, at least on some of the edges of the device forming the cover 22, one or more cleats or gadroons 36, advantageously in the vicinity of the edges on the sides other than those reserved for the securing zones 30 with the container A, the arrangement shown of the tabs or gadroons 36, on the adjacent edges of the sides opposite to the hinge, is an integral part of the present invention, but is not limiting.
• the preforms 22a having been produced by thermoforming in the thermoforming station 20, it then arrives by advancing the film 14 at the pre-cutting station 50 transverse between the preforms 22a and FIG. 3 represents the only transverse zones precut 24 hatched, which keeps the preforms 22a still secured to each other by the lateral holding and joining zones 26.
• the film 14 advances to the station for loading the receptacles A on 0, the cover device still in the form of a preform 22a, precut, shown in FIG. 4, where they are embedded and held together by the tabs or gadroons 33.
• FIG. 6 represents the containers A or trays of bagged products which are secured to the preforms 22a of the devices forming a cover 22 after leaving the station 70 for securing.
• FIG. 6 also shows the realization of the longitudinal cutting of the longitudinal junction zones 26 in the cutting station 80, this longitudinal cutting being shown in dotted lines 48.
• the station 90 for evacuating the receptacles A provided with the lids 22 makes it possible to evacuate these, shown in the finished state in FIG. 7-8 -9, on an evacuation conveyor towards stacking stations and storage, and also o ensure the elimination of cutting residues.
• the joining or fixing of the lateral zone 30 with the corresponding lateral zone 40 of the container A can be carried out by any 5 fixing means making it possible to fix or weld the cover device 22 by its lateral zone, preferably a tongue 32 on container A.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
• Closures For Containers (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=9497700

Family Applications (1)

Country Status (3)

Family Cites Families (6)

• 1996
  • 1996-11-18 FR FR9614009A patent/FR2755952B3/fr not_active Expired - Lifetime
• 1997
  • 1997-11-13 WO PCT/FR1997/002045 patent/WO1998022366A1/fr not_active Ceased
  • 1997-11-13 EP EP97945924A patent/EP1007439A1/de not_active Withdrawn

Non-Patent Citations (1)

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