| 摘要 |
PCT No. PCT/SE84/00180 Sec. 371 Date Jan. 7, 1985 Sec. 102(e) Date Jan. 7, 1985 PCT Filed May 19, 1984 PCT Pub. No. WO84/04507 PCT Pub. Date Nov. 22, 1984.An apparatus for inserting an internal lid (6, 7) in a tubular formed container (1) and for sealed connections of the lid to the inner of the container tube by constant heat welding, high frequency welding or ultrasonic welding and comprising a carrier (8) for holding the container tube (1) while introducing and weld connection the lid (6, 7), a support provided above the carrier (8) for positioning a plane punched out lid blank having a larger outer periphery than the inner periphery of the container tube, a piston means (16) pressing the lid blank into the container tube while folding a narrow edge rim (7) upwards from the lid plane (6) and in which the piston means comprises a lower piston part (18) and an upper piston part (20) which are axially movable in relation to each other and an expandable means (19) between said two piston parts (18, 20) which expandable means is pressed radially outwards when the two piston parts (18, 20) are compressed. The bottom of the lower piston part (18) is formed with a thin press edge (21) having an outwards-downwards sloping surface (24) which at the inner part thereof is directly succeeded by a flute (22). The upper piston part (20) which at the bottom is cup-shaped (25) is axially movable on the lower piston part (18) into and from contact with the expandable means (19). The expandable means preferably is a rubber ring (23) the form of which is changed when the upper piston part and the lower piston part are compressed, whereby the rubber ring is formed with a radially outwards directed pressure line (26) engaging the fold up lid rim (7) adjacent the very lid plane (6). The carrier (8) and the press piston (16) has substantially parallel cylindrical sides, whereby the weld pressure practically solely is provided by the expandable means (19) within area of the means (10) of the carrier for providing welding heat. |
