SACK FOR FLOWING MATERIALS Russian patent published in 1997 - IPC

FIELD: packing. SUBSTANCE: sack is made of pair of flat walls made of sheet elastic material, for instance, plastic film. Walls are tightly connected to form storage chamber between opposite walls designed for keeping flowing materials. Flowing material discharge channel is connected with material keeping chamber. Channel is arranged beyond the limits of chamber. Sack or bag are made so that parts of opposite walls forming discharge channel can be shifted to form relatively sealing joint at least in one place when filling the chamber with flowing material. Chamber passes beyond the limits of joint in direction to output end of discharge channel. It means that angle α is acute angle. At least one tapering, preferably in place of sealing or close to this place can be made as alternative or additionally in discharge channel. EFFECT: improved storing of flowing materials. 35 cl, 31 dwg , 1 tbl