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|국가/구분||United States(US) Patent 등록|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 3 인용 특허 : 5|
A side gusseted poly bag with a filling valve and its method of manufacture including a tubular body with opposed side gussets defining front and rear panels, and a filling valve formed by folding the front and rear panels with the interconnecting gusset portion at one corner of the bag inwardly into the bag forming a filling panel, and simultaneously heat sealing the top edges of the front and rear panels with the top edges of the filling panel forming a filling tube and valve that closes itself under the force of material as it rises in the bag.
What is claimed is: 1. A side gusseted poly bag with a filling valve, comprising: a tubular body constructed of a thermoplastic material having side gussets one on each side defining forward and rear main panels, said forward and rear panels being heat sealed together with the gussets along a top portion and a bottom portion of the poly bag except at one corner of the poly bag where the front panel is not connected to the rear panel defining a filling opening in the poly bag, a filling tube attached to the front and rear panels at the opening and extend...