Envelopes – wrappers – and paperboard boxes – Wrapper – Bottle
Patent
1983-06-07
1985-08-06
Moy, Joseph Man-Fu
Envelopes, wrappers, and paperboard boxes
Wrapper
Bottle
229 37E, B65D 524
Patent
active
045330794
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a tray, particularly for foodstuffs, said tray being produced from a stamped and creased blank made from carton or the like stiff material, said tray consisting of a bottom and four side walls, the latter being connected to each other in pairs by a corner structure consisting of at least two substantially triangular areas in contact with adjacent side walls having extensions in the form of folded-out flanges, which lie in a plane parallel to the bottom of the tray and form a continuous frame for coaction with a separate lid with which the tray may be closed.
Trays of this type are used for foodstuffs, and then often for ready-cooked food, which is usually warmed up directly in the tray, e.g. with the aid of a microwave oven or a hot air oven. In the known trays the side walls are provided with folded-out, outstanding edge flanges forming a frame against which a lid is intended to be fixed, e.g. by hot-melt sealing, after the tray has been filled. During the packing of these trays the outstanding edge flanges have caused quite a few problems. From the handling aspect, the flanges result in that the trays cannot be put on their side edges during packing, and that hooking together or flange collisions occur, with the result that there is tray leakage. Furthermore, the flanges take up space, since a gap corresponding to the flange width occurs between the trays when they are packed side by side.
The drawbacks of this known type of tray have been eliminated by the invention, which proposes the provision of a tray of the kind mentioned in the introduction, which can be stacked both side by side and on a side edge during packing without any outstanding flanges catching in each other or forming air gaps between the trays. Essentially distinguishing for the invention is that each of the side walls is inclined at an acute angle to the bottom plane of the tray in the area above a crease line extending round the periphery of the tray and at a given distance from the bottom plane thereof, so that the continuous frame formed by the edge flanges is substantially inside the outer contour of the side walls. There is accordingly provided a tray, which, in spite of its being provided with an edge flange running round its opening, for coaction with a lid tightly sealing the tray, does not have any parts projecting outside the contour of the side walls.
The invention will now be described below with reference to some embodiments illustrated by way of example on the appended drawings.
FIG. 1 is a perspective view of a first embodiment of a tray in accordance with the invention,
FIG. 2 is an end view of the tray illustrated in FIG. 1,
FIG. 3 is a plan view of the blank to the tray illustrated in FIGS. 1 and 2,
FIG. 4 is a perspective view of a second embodiment of the tray in accordance with the invention, in which the fastening flaps are fixed to the inside of the short side walls,
FIG. 5 is an end view of the tray illustrated in FIG. 4,
FIG. 6 is a plan view of the blank to the tray illustrated in FIGS. 4 and 5,
FIG. 7 is a side view of a third embodiment of the tray in accordance with the invention and
FIG. 8 is a plan view of the blank to the tray illustrated in FIG. 7.
The tray 1 illustrated on the drawings is preferably manufactured from carton or the like stiff material, having at least on the side facing towards its interior a liquid-proof, sealable, high temperature-resistant coating such as polyester. The tray 1 has a bottom 2 and four side walls 3, 4, 5, 6 connected in pairs to each other by a corner structure 7 including a fastening flap 8, which is either attached to the outside or inside of the adjacent side wall. The side walls 3, 4, 5, 6 have an upper portion 9 inclining at an acute angle to the bottom 2 of the tray 1 from a crease line 10 round the tray 1. The side walls 3, 4, 5, 6 have an extension in the form of an edge flange 11, folded out in a plane parallel to the bottom of the tray 1 from the upper inclined portion 9, and forming a frame running round the opening of the tr
REFERENCES:
patent: 2330262 (1943-09-01), Biggs
patent: 2434756 (1948-01-01), Brooks
patent: 3034697 (1962-05-01), Frankenstein
patent: 3178093 (1965-04-01), Wasyluka
patent: 4199097 (1980-04-01), Christensson
patent: 4260098 (1981-04-01), Manizza et al.
patent: 4343428 (1982-08-01), Persson
Man-Fu Moy Joseph
Sprinter System AB
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