FIELD: packaging industry.
SUBSTANCE: invention relates to sealing devices tightly closing the necks of containers for liquid food products. Element facilitating welding and intended for opening device is made with possibility of insertion into cover of opening device for its connection to closing element, which closes pouring opening of opening device. Welding promoting element comprises sheet element (31) made with layer (32) of electroconductive material, with first layer (33) of heat-sealable plastic and with second layer (34) of heat-sealable plastic, located on opposite sides of said layer (32), wherein said layer (32) has thickness in range of 5–15 mcm, and each of said first layer (33) and second layer (34) has thickness in range of 10–50 mcm.
EFFECT: improved sealing of container neck and exclusion of unauthorized disconnection of cover from container neck.
15 cl, 9 dwg
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