METHOD AND APPARATUS FOR SEALING CARDBOARD CONTAINERS AND A CONTAINER COMPRISING A CARDBOARD BOTTOM AND A CARDBOARD TOP

摘要

Method and apparatus for sealing plastic or synthetic coated sealing surfaces of cardboard containers to each other. One feature of the invention resides in preheating (by 15) of at least one (48) of the plastic or synthetic layers and then sealig (station 16) by the simultaneous application of heat and pressure. Another feature of the invention resides in the fact that the pressure is applied at spaced intervals (by 40) and in such a manner that one (47) of the plastic or synthetic sealing layers remains with the top of the box upon removal thereof. A container sealed in such a manner is also taught.