Method of applying closures to containers

In a method of applying a deformable cup-shaped metal closure to a bottle, wherein said closure has a top and a dependent plain cylindrical skirt with a lower bead free margin and a flexible sealing gasket inside of said top, said closure being arranged to be applied to said bottle neck having an upper cylindrical sealing surface above the bottle thread, the improved method comprising placing said closure over said threaded bottle neck, applying pressure to said closure top pressing said gasket firmly against the top and surface of said bottle neck and, while said closure is so held down, reducing the diameter of the upper end of said skirt at angularly spaced intervals to press said gasket into sealing relationship with said cylindrical sealing surface on said bottle neck above said bottle threads and simultaneously forming a band of knurling for manual grasping, and rolling thread in said skirt of said closure by applying a radially inward force to the portion of said closure skirt overlying said bottle thread and simultaneously restraining said lower margin of said closure skirt against billowing during the formation of thread therein by means of plain cylindrical rollers engaging the part of the skirt being threaded.

In a method of applying a deformable cup-shaped closure blank to a bottle, wherein said closure blank has a top and a dependent plain cylindrical skirt and a flexible sealing gasket inside of said top, said closure being arranged to be applied to said bottle neck having an upper cylindrical sealing surface above the bottle thread and a mouth defined by the top end surface of said neck, the improved method comprising placing over the mouth of said bottle said closure, pressing said top of said blank down on to said top of said bottle and simultaneously deforming inwardly, at a multiplicity of circumferentially spaced locations only those radially outer cylindrical surface portions of said blank immediately adjoining said mouth of the bottle to seal said bottle and, whilst maintaining said downward pressure on said top of said blank, using thread rollers to roll said skirt of said closure blank into conformity with said screw-thread on said bottle neck.

In a method of applying a deformable cup-shaped metal closure to a bottle, wherein said closure has a top and a dependent plain cylindrical skirt and a flexible sealing gasket on the underneath surface of said top, said closure beig arranged to be applied to said bottle neck having an upper cylindrical sealing surface above the bottle thread, and a mouth defined by the top end surface of said neck, the improved method comprising placing said closure over said bottle mouth pressing said top of said blank down on to said bottle and simultaneously deforming inwardly, at a multiplicity of circumferentially spaced locations only those radially outer cylindrical surface portions of said blank immediately adjoining said mouth of said bottle to seal said bottle and, whilst maintaining said downward pressing on said top of said blank, using thread rollers to roll said skirt of said closure blank into conformity with the screw-thread on said bottle neck and rolling said skirt in a manner non-deforming to the skirt against said bottle neck by means of plain cylindrical rollers disposed at the location where the screw-thread is being formed and circumferentially intermediate said thread rollers, thereby to restrain billowing of the skirt between the thread rollers.

In a method of applying a deformable cup-shaped metal closure to a bottle, wherein said closure has a top and joined thereto in a radiused corner, a dependent plain cylindrical skirt and a flexible sealing gasket inside of said top having a thickened region in the angle between the cylindrical skirt and the top, said closure being arranged to be applied to said bottle neck having an upper cylindrical sealing surface above the bottle thread and a mouth defined by the top end surface of said neck, the improved method comprising placing said closure blank over said neck of said bottle pressing said top of said blank down on to said top of said bottle and simultaneously deforming inwardly, at a multiplicity of circumferentially spaced locations only those radially outer cylindrical surface portions of the blank immediately adjoining said mouth of the bottle to seal said bottle and, whilst maintaining said downward pressure on said top of said blank, using thread rollers to roll said skirt of said closure blank into conformity with the screw-thread on the bottle neck.

In a method of applying a deformable cup-shaped metal closure to a bottle, wherein said closure has a top and a dependent plain cylindrical skirt with a lower bead free margin and a flexible sealing gasket on the underneath surface of said top, said closure being arranged to be applied to said bottle neck having a upper cylindrical sealing surface above the bottle thread and a top defining a mouth, the improved method comprising placing said closure over said mouth of said bottle, pressing said top of said blank down on to said top of said bottle and simultaneously deforming inwardly, at a multiplicity of circumferentially spaced locations, only those outer cylindrical surface portions of the blank immediately adjoining said mouth of said bottle to seal said bottle, and whilst maintaining said downward pressure on the top of the blank using thread rollers to roll said skirt of said closure blank into conformity with said screw-thread on said bottle neck and simultaneously rolling said skirt against said bottle neck in a manner non-deforming to the skirt by means of plain cylindrical rollers disposed at the location where the screw-thread is being formed and circumferentially intermediate said thread rollers, thereby to restrain billowing of said skirt between said thread rollers.