Patent ID: 7459045
Filing Date: 2008-12-02
Classification: B65B

Abstract:
1. A machine for sealing a cryotube with a film, wherein the cryotube comprises a tube body, a cap threadedly engaging with an open end of the tube body, and a tubular thermoplastic film received at the joint of the cap and the tube body, the machine for sealing a cryotube with a film comprising: a holder adapted to hold the cryotube, wherein a bottom opposite to the open end of the tube body is to be held in the holder while the cap and the thermoplastic film extend out from the holder; a rotation mechanism for driving the holder to rotate around a longitudinal axis of the cryotube held in the holder; a heating mechanism for heating the thermoplastic film of the cryotube held in the holder, so that the thermoplastic film shrinks; a conveying mechanism that conveys the holder and the rotation mechanism from a working position to a heating position and from the heating position to the working position, wherein at the heating position, the cryotube held in the holder is positioned such that the thermoplastic film is heated by the heating mechanism; and a control unit for controlling a start of the rotation mechanism, a start of the heating mechanism and a start of the conveving mechanism, so that the holder and the rotation mechanism are conveyed from the working position to the heating position by the conveying mechanism, the thermoplastic film of the crvotube held in the holder is heated for a predetermined time by the heating mechanism while the holder is rotating, and then the holder and the rotation mechanism are conveyed from the heating position to the working position by the conveying mechanism after the heating is finished.