Filling valve for a bag or other container
Patent 4364510 Issued on December 21, 1982. Estimated Expiration Date: 
July 18, 2000. 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.
July 18, 2000. 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 1946995 3065899 3191850 3904107 InventorAssigneeApplicationNo. 06/170159 filed on 07/18/1980US Classes:383/48, With supplemental closing feature383/54Including separate closure elementExaminersPrimary: Garbe, Stephen P.Attorney, Agent or FirmInternational ClassB65D 30/24 (20060101)Foreign Application Priority Data1980-05-02 GBAbstractA leak-proof filling valve for a paper sack is formed by folding a composite sheet formed from Kraft paper 1 on top of which is laid relatively flexible polythene 2. The folded sheet is secured between end flaps 10A, 12 of a paper sack. The sack is charged with material 16 through a mouth 15 and passes through a short inner channel between parts 1C, 1D, and a longer outer channel between parts 2A, 2B. Reverse flow between parts 2A, 2B is prevented by material which percolates into pocket 17, assisted by the different flexibilities of the parts 1A, 2A. Any material which nevertheless does pass into space 18 is prevented from escaping between parts 1C, 1D by accumulation of material in pocket 19 this being assisted by the different flexibilities of parts 1C, 2C. | |
