Patent ID: 8011169
Filing Date: 2011-09-06
Classification: B29C,B29L,B65B

Abstract:
1. A jaw for use in sealing of an end fin of a packaging carton, which fin comprises first and second outer sealing panels and first and second inner sealing panels which are sandwiched between said outer sealing panels and each folded upon itself and which are so disposed between said outer sealing panels as to produce a central incipient channel bounded by said outer sealing panels and inwardly folded edges of the respective inner sealing panels, said jaw comprising a sealing rib extending longitudinally of an active face of said jaw and comprising respective opposite end portions extending longitudinally of said active face and, between said end portions adapted to seal said central incipient channel transversely, a bowed middle portion, the arrangement being such that, during the sealing, the bowing of said middle portion is away from the middle of the carton, there being substantially no sealing protrusions to that side of said rib which, during the sealing, is towards the middle of the carton.