| 摘要 |
PURPOSE: A feed sack capable of economically manufacturing is provided to fill more feed in the sack compare to conventional feed sacks, and to decrease the length of the sack after filling. CONSTITUTION: A feed sack comprises the following: a first junction unit(110) formed on the lower side of a bag(101) for inserting and packaging feed; a second junction unit(120) surrounding a vent unit(130) for exposing a central unit(110b) except for both ends of the first junction unit to the feed inside the bag; a horizontal sealing unit(121) with one end separated from the side surface(101a) of the bag for forming an air passage(121a); and a vertical sealing unit(122) with a crossing point(122a) with the first junction unit, extended from the other end of the horizontal sealing unit.
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