Receptacles – Closures – With closure opening arrangements for means
Patent
1991-02-21
1992-06-30
Marcus, Stephen
Receptacles
Closures
With closure opening arrangements for means
220359, 215232, 215305, 215298, 2291232, 22912535, B65D 1734
Patent
active
051255294
DESCRIPTION:
BRIEF SUMMARY
FIELD AND BACKGROUND OF THE INVENTION
The present invention relates to a multi-layered thermoplastic container opened by partially peeling back a multi-layered top heat-sealed to the edge of said container and comprising, from bottom to top, a tear-off, simple or complex, internal sheet permanently heat-sealed on the edge of said container, a simple or complex intermediate sheet provided with an opening for access or a curved line for incision or weakening for opening and firmly adhering to said internal sheet at least outside the zone defined by said access opening or at least partially closed curved incision line, as well as a simple or complex outer sheet adhering, on the one hand, in peelable manner, to the intermediate sheet outside said zone defined by the access opening or the curved incision line made in this intermediate sheet and, on the other hand, in firm and non-peelable manner, either directly to a part of the internal sheet traversing said access opening, or to the intermediate sheet inside the zone defined by said incision line, said container further comprising a peeling tab in order to facilitate grip of the outer sheet on the edge of said recipient thermoformed from a multi-layered thermoplastic band.
In the case of known containers of this type, the internal sheet of the multi-layered top is hermetically heat-sealed on the layer of thermoplastic material of same nature of the edge of the container with complex wall, with the result that it is not easy, if not difficult, and even impossible to grip the edge of said top in order to peel the outer sheet and reveal the opening giving access to the container.
In order to facilitate grip of the outer sheet, and the beginning of the peeling thereof, it has already been proposed (FR 2 503 036) to make in a corner of the edge of the container provided with its top, from the lower face of said edge, a notch for weakening making it possible to break, by folding, said corner up to the outer sheet and to peel the latter from the intermediate sheet of said top. This modus operandi does not make it possible easily to provide the start of peeling at any point whatsoever of the edge of the container and, in addition, the operation of partial cutout or incision for making the notch can only be effected separately from the cutout of the containers and independently thereof.
Another known proposition for making a start of peeling (FR 2 551 031) consists in forming on an edge of the top between the intermediate sheet and the outer sheet thereof, a zone of non-adherence by a special treatment of non-adherence of one or the other of these two sheets. This treatment of non-adherence is expensive and the desired effects thereof are often destroyed during heat-sealing of the top on the edge of the container.
The edge of the top is crimped by the effect of cutout punches, in particular with the sharp profile necessary for the multi-layers.
SUMMARY OF THE INVENTION
One object of the present invention is to eliminate or at least attenuate these drawbacks and to propose a container of the type mentioned at the beginning, of which the outer sheet of the top may be easily gripped and peeled off.
This object is attained according to the invention in that the peeling tab comprises at least one shallow scalloping made either in the multi-layered top or in the edge of the container from the plane of heat-seal of the top on said edge, so as to define between the latter and the internal sheet of the top a narrow grip cavity open on the superposed edges of the top and of the edge and defined by the internal sheet of the top and an internal layer of the container constituted by a thermoplastic material firmly adhering by heat-seal to the internal sheet of the top and, facing the area where the internal sheet of the top and the internal layer of the container meet, the intermediate sheet of the top presents a tearing edge facilitating tear of the internal sheet of the top in the zone of the peeling tab, and peeling of the outer sheet of said top in order to reveal the open
REFERENCES:
patent: 3547338 (1970-12-01), Hemmes
patent: 3632004 (1972-01-01), Grimes et al.
patent: 3663240 (1972-05-01), Seiferth et al.
patent: 4381848 (1983-05-01), Kahn
patent: 4673601 (1987-06-01), Lamping et al.
patent: 4735335 (1988-04-01), Torterotot
patent: 4913307 (1990-04-01), Takata et al.
patent: 5004111 (1991-04-01), McCarthy
ERCA Holding
Marcus Stephen
Schwarz Paul A.
LandOfFree
Thermoplastic container opened by partially peeling back a multi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermoplastic container opened by partially peeling back a multi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermoplastic container opened by partially peeling back a multi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1857718