| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 1 | Bag bottomer | US4882048 | 1948-09-11 | US2570047A | 1951-10-02 | BURROUGHS EDWIN E |
| 2 | Manufacture of valve bags | US3548722D | 1968-08-16 | US3548722A | 1970-12-22 | JONES ELWYN DAVID; ROWLEY EDWARD KENNETH; SHEPHERD DOUGLAS REYNOLDS |
| 3 | Installation for manufacturing block bags | US3473445D | 1968-05-13 | US3473445A | 1969-10-21 | MEULEN LEONARD VAN DER |
| 4 | Pocket valve for valved bags made of plastics material sheeting and having crossed end closures | US3680770D | 1970-04-03 | US3680770A | 1972-08-01 | MULLER REINER; ACHELPOHL FRITZ |
| The pocket valve for a bag consists of a tube of plastics material sheeting, which tube is open in a portion of its length at its inner end along the two side edges. The lower of the two resulting flaps is backfolded and adhered to the corner tuck of the valve corner of the bag.
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| 5 | Process and apparatus for manufacturing a flexible container | US17046462 | 1962-02-01 | US3103856A | 1963-09-17 | MARTIN RAWE; WALTER KERKMANN |
| 6 | Method of manufacturing crossed bottom bags with tubular sleeve inserts | US63954757 | 1957-02-11 | US2955517A | 1960-10-11 | CARL HONSEL |
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