초록 ▼

This relates to the double seaming of an end unit to a metal can body where the end unit is of the full opening, easy opening type incorporating a pull tab for the purpose of initiating a rupture followed by pull out of an end panel of the end unit. Most specifically, the end unit is of an oblong re

This relates to the double seaming of an end unit to a metal can body where the end unit is of the full opening, easy opening type incorporating a pull tab for the purpose of initiating a rupture followed by pull out of an end panel of the end unit. Most specifically, the end unit is of an oblong rectangular or generally other than round outline so as to have a fixed orientation with respect to a double seam forming double seaming chuck. By having a fixed relationship between each end unit and the double seaming chuck and the pull tab with respect to the configuration of the end unit, it is possible to form a notch in the underside of the double seaming chuck to clear the pull tab. This permits the pull tab to have a force applying nose thereof positioned closely adjacent to a chuck wall of the end unit so that it may overlie a score line or weakening line formed in the chuck wall radius between the chuck wall and the end panel.

대표청구항 ▼

A seaming chuck for use in a double seaming operation for securing an end unit to a can body wherein said end unit carries a pull tab in a preselected position relative to said end unit, said seaming chuck having means for assuming a predetermined orientation relative to an associated end unit, said

A seaming chuck for use in a double seaming operation for securing an end unit to a can body wherein said end unit carries a pull tab in a preselected position relative to said end unit, said seaming chuck having means for assuming a predetermined orientation relative to an associated end unit, said seaming chuck having an exterior wall for engaging and backing up an end unit chuck wall during a double seaming operation, and said seaming chuck having a notch through said exterior wall in alignment with the preselected position of the pull tab to automatically clear the pull tab.