| 摘要 |
1,070,320. Packaging-machines. AKERLUND & RAUSING A.B. Dec. 8, 1965 [Jan. 2, 1965], No. 52091/65. Heading B8C. Coffee beans are ground and packaged in an inert atmosphere such as carbon dioxide or nitrogen, the ground coffee being passed into a tube of the packaging material, which is then successively sealed to form individual unit packages. As described (Fig. 1, not shown), a web 6 of the packaging material is formed into a tube (7) around a filling pipe 4. Air is first removed from the apparatus by passing the inert gas, via a valve 9, through a conduit 11, which is introduced into the open end of the tube (7) to cause the gas to pass through the tube (7), filling pipe 4, dispensing means 3, grinding mill 2 and finally to atmosphere through a hopper 1. Sampling conduits 18 provide means for measuring the residual oxygen content. After air removal, the end of the tube (7) is closed by sealing means 12 (Fig. 2) and the valve 9 reversed to cause the gas to flow through a conduit 10 directly to the filling pipe 4. The conduit 10 may alternatively be connected at other positions such as at the mill 2 or the hopper 1. The mill 2 and the web 6 feed is started, whereupon ground coffee 16 passes into the tube (7) and together with some carbon dioxide is enclosed in packages 15 formed by successive operation of the sealing means 12. Excess gas is removed from the packages 15 by compression between plates 13 during sealing. A cut-off device may be combined with the sealing means to detach the individual packages. |
