FIELD: packing. SUBSTANCE: invention relates to opening device made of plastic material which is formed directly on sheet by injection moulding. Proposed opening device 2 is secured on hole 4 in upper wall part 16 of packing container 12, being located adjacent to container bending line 14. Device has part 8 consisting of base and cover 10. Projection 11 - opening indicator is used also as cover opening lip. Tearoff edge 28a is found between part forming the base and over part. Hinge 9 has two stable positions and it displaces cover part to keep it stable in opened position to preclude interference when pouring out product. Base forming part is provided with upper ring part 30, and cover part is provided with lower ring part 32. parts 30 and 32, after separating cover and base parts, can be mated, in lock and release manner, for re-sealing of opening device. EFFECT: improved convenience in use. 8 cl, 5 dwg
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