| 摘要 |
903,278. Seaming non-metallic sheet material. OTT, K., [trading as HABRA-WERK W. F. OTT]. May 11, 1960 [June 2, 1959; Jan. 23, 1960], No. 16615/60. Class 42 (1). [Also in Group XVII] Relates to the making of paper and like bags and especially to a process (see Group XVII) in which the openings of bags formed of heatsealable material or material coated with a heatsealable layer, are closed, during which process flaps 12, Fig. 6, are sealed between heated jaws 24, 25. A seaming operation results from a construction of the jaws whereby a groove 12a, Fig. 6a, is pressed into the flaps. |
