| 摘要 |
The hot-melt glue application procedure consists of delivering the molten glue through a nozzle through a nozzle (15) to the surface (13a) of a transfer roller (13), and from it to the closing flap (10a) of an envelope (1a). Variants of the design can use a cylindrical roller to which narrow strips of glue are applied for transfer to a series of envelopes moved parallel to the roller's axis, or a roller with surface projections, each receiving a layer of glue to transfer. A cold air flow can be used to set the glue after application. |
