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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

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.

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A machine 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, said closure member having an upstanding tubular inner wall conforming to the inn

A machine 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, said 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 said folded-over, reinforced portion, thereby forming a closure assembly comprising a tubular channel in which said folded-over, reinforced portion is seated in frictional engagement, which machine comprises: pincer-like means for pinching together selected portions of said closure assembly comprising punching-point means and anvil means disposed on axially opposed portions of the jaws of said pincer-like means; container-positioning means for positioning said closure assembly with said tubular channel disposed between the jaws of said pincer-like means and said anvil means, with the upstanding wall thereof opposed to one of the said punching-point means and the downstanding wall thereof opposed to the other; and, pinching means for moving said jaws to pinching position, comprising wedging means acting on said pincer-like means to close said jaws and to cause the wall portions of the tubular channel at said selected portions of said closure assembly to be pinched into the folded-over, reinforced portion in said channel and pressure-applying means acting on said wedging means to cause it to exert pressure on said pinching means and through the same on the pinched-in portions of said closure assembly.