Apparatus and method for making capsules with filter
AssigneeSarong Societa' Per Azioni
InventorsAndrea Bartoli, Flavio Traldi
Life of this patent
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Abstract
An apparatus for making a capsule provided with a shell containing a filtering element suitable for receiving a product for preparing a beverage or the like includes a superimposing assembly for applying a film of filtering material to at least one shell with a cavity in order to cover an opening of the cavity. The shell is moved along a first advancement direction and the apparatus further includes a locking assembly to lock the film to the shell, and a first stretching device included in a first stretching station for heating and stretching a portion of the film facing the cavity in order to obtain a filtering element.
Claims18
Apparatus for making a capsule provided with a shell containing a cavity and a filtering element suitable for receiving a product, comprising
- a) a superimposing assembly for applying a film of filtering material to a flange rim extending from an edge of at least one shell around an opening of said cavity, said shell and said superimposed film being moved along a first advancement direction;
- b) a first welding locking assembly to lock a first portion of said film to said shell flange rim adjacent the cavity opening, a second portion of said film extending over said cavity opening, and
- c) a first stretching assembly in a first stretching station for heating said second portion of said film and stretching said second portion of said film into said cavity in an axial direction of said shell in order to form a filtering element within said shell cavity.
A method for making a capsule provided with a shell containing a filtering element suitable for receiving a product comprising the steps of
- a) applying a film of filtering material to a flange rim of a shell containing a cavity to cover an opening of said cavity;
- b) locking a first portion of said film to said shell flange rim adjacent said cavity opening, a second portion of said film extending over said cavity opening;
- c) heating the second portion of said film extending over said cavity opening and stretching the second portion of said film into said cavity in an axial direction of said shell in order to form and obtain a filtering element.
Dependencies are inferred from the claim text.