| 摘要 |
A machine and process useful for fastening a closure member to a container with an upstanding tubular wall, an end edge of which is folded over onto itself to form a folded-over, reinforced portion of double thickness at that end, the closure member having an upstanding tubular inner wall conforming to the inner surface of the folded-over, reinforced portion and a downstanding tubular outer wall connected thereto and conforming to the outer surface of the folded-over, reinforced portion, thereby forming a tubular channel in which the folded over, reinforced portion is seated in frictional engagement, which comprises a dish-shaped fastening head adapted to be positioned around the closed end of the container between the jaws of a pincer, one end of which comprises a punching point and the other of which comprises an anvil, and a wedge or a wedging toggle arranged to wedge a plurality of said punching points into selected portions of the upstanding tubular inner wall of the channel into the inner surface of the folded-over, reinforced portion against the anvils on the opposed jaws. The wedge or toggle is designed to give a mechanical advantage of at least two and to engender a pressure on the selected portions pinched-in by the jaws sufficient to cause hot melt adhesive to flow in or through cut areas in the folded-over portion and to seal the cover thereto without application of extraneous heat. |
