B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
93/22, 220/6
B65D 33/02 (2006.01) B31B 39/00 (2006.01) B65D 75/26 (2006.01) B65D 75/38 (2006.01) B65D 75/68 (2006.01)
Patent
CA 1056346
ABSTRACT OF THE DISCLOSURE Multiwall open mouth pouch bags for seal-in, detached pouch packaging of commodities have an inner tube of heat sealable plastic material and a contiguous outer tube comprising one or more plies of non-heat sealable material. These plies have thermal transmission properties and flexibility such that said inner tube may be heat sealed to closure and severed by compressive heat and creasing pressure applied to said outer tube. The inner tube is sealed closed at one end and circumferentially bonded to said outer tube at said open bag end and is otherwise detached therefrom to form a pouch within said outer tube. The outer tube is sealed to closure at said closed bag end beyond said inner tube closure. The bag after commodity charging, is closeable at its open end by heat sealing to closure and severing said inner tube adjacent said end and thence sealing to closure said outer tube beyond said sealed closure of said inner tube. The commodity containing inner tube is sealed closed at both ends and sealed within said outer tube but com- pleley detached from said outer tube, and may be withdrawn therefrom intact on subsequent opening of said outer tube. Method and means for producing said bags and packaging commodities therein are also disclosed.
275617
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