| 摘要 |
FIELD: packaging industry.SUBSTANCE: re-closable opening device (3, 3') for packages (1) for fluid food products. The opening device comprises a housing (10) mounted around the pierceable part (4) of the package and limiting the through water outlet (11), a removable threaded cover (12) which is screwed to the housing for closing the water outlet, a tubular cutting element (15) engaging the water outlet, having at one axial end the cutting means (31) which interacts with the pierceable part for opening the package; the first connecting means (13) attaching the cover to the cutting element which when the cover is unscrewed from the housing pushes the cutting element towards the pierceable part, the second connecting means (14) attaching the housing to the cutting element, which when used supplies the cutting element in the pierceable part along the given path (P) of piercing in response to unscrewing the cover; and the path (P) of piercing of the cutting element when unscrewing the cover from the housing has a first part (P) of only axial movement, followed by a second part (P) having both an axial component and a rotational component of the movement (dwg. 3).EFFECT: development of the re-closable opening device.10 cl, 12 dwg |
