Apparatus and method for formation of sealed packages

摘要

An apparatus and method are disclosed for evacuating and sealing a bag (133) made of a sealable material and containing charge (134) of a comminuted or other flowable product, such as roasted and ground coffee. The bag (133) is positioned with its open upper end around a sleeve (12) through which a hollow probe (14) can be extended. A pair of upper jaw members (UJ) close to form an outer temporary seal about an upper region of the bag above an intermediate region of the bag which is also above the level of the surface of the charge (134) in the bag (133) where a permanent seal is to be formed. A pair of lower jaw members (LJ) close to form an inner temporary seal about a lower region of the bag below the upper and intermediate regions and above the surface of the charge (134) in the bag (133). With the probe (14) extended through the sleeve (12) into the bag (133), the bag (133) is evacuated through the probe (14). After evacuation is completed and after withdrawal of the hollow probe (14) a pair of sealing member (HJ) close against the intermediate region of the bag (133) in order to form a permanent seal for the bag (133). The bag (133) can be lifted, prior to forming the permanent seal, in order to press the charge (134) and bag material against the underside of the lower jaw members (LJ) to form a neatly squared off top to the package.