초록 ▼

A method for simultaneously sealing and creating a thermal perforation between two thermoplastic layers that comprises providing two thermoplastic layers. A drum is provided that has at least one sealbar and perforation assembly. The two thermoplastic layers are contacted to the sealbar and perforat

A method for simultaneously sealing and creating a thermal perforation between two thermoplastic layers that comprises providing two thermoplastic layers. A drum is provided that has at least one sealbar and perforation assembly. The two thermoplastic layers are contacted to the sealbar and perforation assembly. The thermoplastic layers are sealed with two generally opposing parallel seals and simultaneously create a thermal perforation in the thermoplastic layers generally parallel to the opposing seals. The thermal perforation is located between the two opposing seals.

대표청구항 ▼

A method for simultaneously sealing and creating a thermal perforation between two thermoplastic layers that comprises providing two thermoplastic layers. A drum is provided that has at least one sealbar and perforation assembly. The two thermoplastic layers are contacted to the sealbar and perforat

A method for simultaneously sealing and creating a thermal perforation between two thermoplastic layers that comprises providing two thermoplastic layers. A drum is provided that has at least one sealbar and perforation assembly. The two thermoplastic layers are contacted to the sealbar and perforation assembly. The thermoplastic layers are sealed with two generally opposing parallel seals and simultaneously create a thermal perforation in the thermoplastic layers generally parallel to the opposing seals. The thermal perforation is located between the two opposing seals. 487 407, FR; 2 568 295, FR; 2 630 149, FR; 2 691 491, FR; 2 697 275, FR; 424 057, GB; 463 190, GB; 614 394, GB; 1 381 986, GB; 1 430 423, GB; 2 117 813, GB; 2 243 381, GB; 2 256 023, GB; 1979-065528, JP; 1981-088825, JP; 1982-119056, JP; 1989-014838, JP; 1989-035858, JP; 1990-009243, JP; 1991-046645, JP; 1991-107056, JP; 1991-169967, JP; 1992-297654, JP; 1993-025916, JP; 1994-146553, JP; 1994-200611, JP; 1994-056310, JP; 1994-320510, JP; 1995-013967, JP; 1995-180333, JP; 1995-292944, JP; 1996-109734, JP; 1997-013631, JP; 1997-256604, JP; WO84/002155, WO; WO87/007667, WO; WO93/013280, WO; WO94/001628, WO; WO94/004773, WO; WO94/026999, WO; WO95/006176, WO; WO96/006248, WO; WO96/018782, WO; WO96/023942, WO; WO96/027719, WO; WO96/027721, WO; WO97/047834, WO; WO98/021428, WO; WO98/022677, WO; WO98/024995, WO; WO98/040583, WO; WO98/058142, WO; WO99/014452, WO; WO99/040273, WO; WO99/066151, WO; WO99/066152, WO; 01/66875, WO; 01/66876, WO