| 摘要 |
A method and apparatus for providing a fin-type back seal on packages produced in a vertical form and fill machine utilizes a web having cohesive coating stripes on the edges thereof which are juxtapositioned by forming and then guided to a cold sealing zone. A cold seal assembly with a pressure-biased grooved roller and complementary platen apply rolling pressure to the cohesively striped area without the application of external heat to provide a good seal. The unit is adjustable universally so as provided adaptation to various styles and types of existing machines.
|
