Dunnage bag |
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| 申请号 | US42479673 | 申请日 | 1973-12-14 | 公开(公告)号 | US3868026A | 公开(公告)日 | 1975-02-25 |
| 申请人 | INT PAPER CO; | 发明人 | BAXTER ROBERT O; | ||||
| 摘要 | A dunnage bag provided with two sheets of flexible material interposed between the walls of the bladder adjacent the air inlet to the bladder. The sheets of flexible material protect the bladder from tearing during inflation. | ||||||
| 权利要求 | 1. In a dunnage bag having a substantially air tight bladder encased within a plurality of reinforcing sheets and including a valve mounted through said plurality of reinforcing sheets and providing fluid communication to the interior of said bladder, the improvement which comprises two unconnected flexible sheets of material interposed between the walls of said bladder, one of said flexible sheets of material i. having an aperture aligned with said valve and ii. secured to the valve containing wall of said bladder peripherally of said aperture, and the other of said two sheets of flexible material being secured to said opposite wall of said bladder so as to flutter while said bag is being inflated. 2. The dunnage bag of claim 1 wherein said bladder is a thermoplastic material. 3. The dunnage bag of claim 2 wherein said plurality of reinforcing sheets are paper. 4. The dunnage bag of claim 3 wherein there are at least six paper reinforcing sheets. 5. The dunnage bag of claim 2 wherein said flexible sheets of material are paper. 6. The dunnage bag of claIm 5 wherein said plurality of reinforcing sheets are paper. 7. The dunnage bag of claim 6 wherein said flexible sheets of paper are coated with a thermoplastic material on at least one side and are heat sealed to said thermoplastic bladder. 8. The dunnage bag of claim 7 wherein there are at least six paper reinforcing sheets. 9. In a dunnage bag having a substantially air tight bladder encased within a plurality of reinforcing sheets and including a valve mounted through said plurality of reinforcing sheets and providing fluid communication to the interior of said bladder, the improvement which comprises a sheet of flexible material interposed between the walls of said bladder and folded to form two overlapping sheets, one of said overlapping sheets: a. having an aperture adjacent to and coaxially aligned with the valve inlet to said bladder; and b. secured to the valve containing wall of said bladder peripherally of said aperture, the other of said two overlapping sheets being unconnected to the walls of said bladder, said flexible sheet of material being thereby disposed within said bladder so as to flutter while said bag is being inflated. 10. The dunnage bag of claim 9 wherein said bladder is a thermoplastic material. 11. The dunnage bag of claim 10 wherein said sheet of flexible material is paper. 12. The dunnage bag of claim 11 wherein said plurality of reinforcing sheets are paper. 13. In a dunnage bag having a substantially air tight bladder encased within at least one reinforcing sheet and including an inflating valve operatively mounted in one wall of said bag, the improvement which comprises a sheet of flexible material disposed within said bladder between said valve and the wall of said bladder opposite thereto, said sheet of flexible material being secured to said bladder so as to flutter while said bag is being inflated through said valve whereby the fluttering of said sheet of flexible material dissipates the energy of the inflating air stream and thereby protects said bladder from the destructive force of an inflating air stream. |
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| 说明书全文 | |||||||
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