Stand-up bag
Patent 4887912 Issued on December 19, 1989. Estimated Expiration Date: 
January 19, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 19, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1509137 1607314 1769259 2687158 2777490 3108732 3604491 Flexible container with resealable opening Laminates and laminated articles Flexible container with internal filling chute Patent #: 4672688 InventorAssigneeApplicationNo. 298956 filed on 01/19/1989US Classes:383/66, For access opening in sidewall383/80Cap-typeExaminersPrimary: Marcus, StephenAssistant: Stemann, Kathryn M. Attorney, Agent or FirmForeign Patent References
International ClassB65D 039/08Foreign Application Priority Data1988-01-19 DEAbstractA bag for containing liquid products, for example, is made of a heat-weldable sheet material. The sheet material may suitably be a compound sheet material which provides a rear face, a front face and an insert bottom. Disposed at an upper portion of the front or rear face is a threaded closure comprising a screw-threaded pipe socket and a screw cap. The pipe socket penetrates one face of the bag and is bonded to the interior surface of the bag with the aid of a welding flange having a larger diameter. The welding flange has a chamfered outer rim cooperating with the sheet material to form a V-shaped circumferential groove which is at least partially filled with the molten plastic material of the sheet during the welding operation. The threaded closure permits the bag to be repeatedly opened and closed for piecemeal dispensing its contents. | |
