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US 4,007,838 AGranted
Flexible sealed liquid containing packet
OwnerNagi M. Awadinventor
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OwnerNagi M. Awadinventor
Estimating the term…
This packet is so constructed as to prevent formation of liquid blisters at sealing areas, which are potential break points and which reduces the shelf life of the packet and does not look good and can cause loss of sterility. The packet has opposed walls which are sealed together at opposite sides and at one end, leaving the other end open for injection of liquid. The open end is lastly sealed. Capillary action of the liquid along the insides of the side seams of the packet can often reach the lastly sealed open end before sealing is accomplished, to cause a blister or weak point which can rupture. The present packet is provided with breaks in the side seams and below the top seam to delay capillary action of the liquid along the inside of the side seams from reaching the open end of the packet before said open end can be sealed, thus preventing formation of liquid blisters at the last sealed area of the packet.
A packet comprising front and rear walls, sealed at its lower end by a lower seam, at its sides by side seams, at its upper end by a top seam, liquid in the packet, and said side seam each having inner edges inside said packet, one extending upwardly from the lower seam and one extending down from the top seam, and a U-shaped edge interconnecting said upwardly and downwardly extending inner edges, and disposed transversely of said upwardly and downwardly extending edges, said U-shaped edges serving to delay flow of liquid in the packet by capillary action along the insides of said side seams from reaching the upper ends of said side seams, to facilitate effectuating seaming of the upper end of the packet to form said top seam before said liquid in the packet flows to the upper ends of said side seams by capillary action and reaches the portions of said front and rear walls that form the top seam when sealed.
Dependencies are inferred from the claim text.