Opening device for a package and package therewith

Abstract

An opening device for a package has a collar delimiting a flow channel extending between an inlet opening of the collar configured to allow for an inflow of the pourable product into the flow channel and a pouring outlet of the collar configured to allow for an outflow of the pourable product from the flow channel and a cutter arranged within the flow channel. The collar comprises an inner surface facing the flow channel. The opening device further comprises a retaining device configured to block movement of the cutter out of the flow channel and through the pouring outlet. The retaining device comprises a retaining group protruding from the inner surface of the collar and an interaction group connected to the cutter. The retaining group and the interaction group are configured to interact with one another so as to block movement of the cutter out of the flow channel and through the pouring outlet. The retaining group comprises one or more hollow retaining elements.

1 . An opening device for a package having a designated pour opening covered with a separation membrane and filled with a pourable product;
 the opening device comprises at least:
 a collar delimiting a flow channel extending between an inlet opening of the collar configured to allow for an inflow of the pourable product into the flow channel and a pouring outlet of the collar configured to allow for an outflow of the pourable product from the flow channel; and 
 a cutter configured to break the separation membrane and being at least partially arranged within the flow channel; 
   wherein the collar comprises an inner surface facing the flow channel;   wherein the opening device further comprises a retaining device configured to block movement of the cutter out of the flow channel and through the pouring outlet;   wherein the retaining device comprises a retaining group protruding from the inner surface of the collar and an interaction group connected to the cutter;   wherein the retaining group and the interaction group are configured to interact with one another so as to block movement of the cutter out of the flow channel and through the pouring outlet;   wherein the retaining group comprises one or more hollow retaining elements.   
     
     
         2 . The opening device according to  claim 1 , wherein each retaining element is formed as a hollow protuberance and/or each retaining element comprises a respective cavity. 
     
     
         3 . The opening device according to  claim 1 , wherein each retaining element comprises a curved solid wall;
 wherein the solid wall protrudes towards a center of the collar;   wherein each curved solid wall defines a hollow protuberance and/or delimits a cavity.   
     
     
         4 . The opening device according to  claim 3 , wherein each solid wall is integral to an inner surface of the collar. 
     
     
         5 . The opening device according to  claim 3 , wherein each solid wall has a thickness, which corresponds to a thickness of at least a portion of the collar. 
     
     
         6 . The opening device according to  claim 1 , wherein each retaining element is convexly shaped towards a center of the collar. 
     
     
         7 . The opening device according to  claim 1 , wherein each retaining element defines a respective indentation and/or within an outer surface of the collar. 
     
     
         8 . The opening device according to  claim 1 , wherein each retaining element is arc-shaped. 
     
     
         9 . The opening device according to  claim 1 , wherein the interaction group comprises at least one interaction element radially protruding from the cutter. 
     
     
         10 . The opening device according to  claim 1 , wherein the retaining group comprises at least two retaining elements being angularly displaced from one another about a central axis of the collar. 
     
     
         11 . The opening device according to  claim 1 , wherein the retaining group comprises an abutment surface and the interaction group comprises an engagement surface;
 wherein the engagement surface is configured to abut against the abutment surface so as to block the movement of the cutter out of the flow channel and through the pouring outlet.   
     
     
         12 . The opening device according to  claim 1 , wherein the retaining group is integrally connected to the collar and/or the interaction group is integrally connected to the cutter. 
     
     
         13 . The opening device according to  claim 1 , wherein the cutter is arrangeable in a rest position in which the cutter is detached from the separation membrane and an active position in which the cutter is configured to break the separation membrane;
 the opening device further comprises an actuation device configured to actuate movement of the cutter from the rest position to the active position.   
     
     
         14 . The opening device according to  claim 1 , and further comprising:
 a base frame configured to be fitted and/or being fitted on the main body and about the designated pour opening and carrying collar; and   a closure configured to selectively open and close the pouring outlet.   
     
     
         15 . A package comprising:
 a main body filled with a pourable product and having a designated pour opening covered with a separation membrane; and   an opening device according to  claim 1  fitted about the designated pour opening.