| 摘要 |
1,088,678. Plastics bags; seams. PLASTIC-SERVICE. Dec. 17, 1964 [Dec. 17, 1963], No. 51460/64. Heading B8K. [Also in Division B5] Plastics bags made by a machine (see Division B5) have two end seams A, B, the seam A in contact with the product being made at a lower temperature than seam B located near the edge of the bag. |
