Manufacture of metallic containers

Abstract

A process for securing bases in the ends of metallic container bodies by .[.upsetting.]. .Iadd.rolling by a seaming roll .Iaddend.contiguous peripheral portions of the bases and container ends, in which overlapping bent-over peripheral base and container end portions are .[.knurled to roll them over.]. .Iadd.rolled together by a seaming roll .Iaddend.to produce a joint having seven superposed thicknesses of the base and the container body. .[.At the end of.]. .Iadd.During .Iaddend.the roll-over movement, a .[.polymerized.]. .Iadd.polymerizable .Iaddend.liquid is injected between at least some of the thicknesses of the metal of the base and container body.

I claim:  .[.1. A process of securing bases in the ends of metallic container bodies by upsetting contiguous peripheral portions of the bases and container ends, comprising supporting a container body, inserting a recessed base portion within the container body end with overlapping bent-over peripheral base and container end portions, said base peripheral portion extending beyond the container end peripheral portion, moving a knurling tool radially towards said edge portions and effecting continuous relative rotary movement between said container and contiguous base on the one hand and said tool on the other hand about the longitudinal axis of said container body to upset said base peripheral portion on itself in a continuous roll-over movement, and effecting further movement of said tool radially with respect to said base and container body successively to roll said base and body edge portions together over each other until a roll-over joint between said base and body edge sections is formed which consists of seven superposed thicknesses of said base and container 
     
        body..]. 2. A process according to claim .[.1.]. .Iadd.5 .Iaddend.wherein at the end of said roll over movements said joint is .[.crushed.]. 
     
     
        .Iadd.flattened.Iaddend.. 3. A process according to claim .[.1.]. .Iadd.5 .Iaddend.wherein .[.at the end of.]. .Iadd.during .Iaddend.said roll over movement a .[.polymerised.]. .Iadd.polymerisable .Iaddend.liquid product is injected between at least some of the thicknesses of the metal of said base and container body.  .[.4. A process of securing bases in the ends of metallic container bodies by upsetting contiguous peripheral portions of the bases and container ends, comprising supporting a container body, inserting a recessed base portion within the container body end with overlapping bent-over peripheral base and container end portions, said base peripheral portion extending beyond the container end peripheral portion, moving a knurling tool radially towards said edge portions and effecting continuous relative rotary movement between said container and contiguous base on the one hand and said tool on the other hand about the longitudinal axis of said container body to upset said base peripheral portion on itself in a continuous roll-over movement, and effecting further movement of said tool radially with respect to said base and container body successively to roll said base and body edge portions together over each other until a roll-over joint between said base and body edge sections is produced, and at the end of said roll-over movement injecting a polymerized liquid product between at least some of the thicknesses of the metal of said base and container body..]..Iadd. 5. A process of connecting bases in the ends of metal container bodies by seaming together contiguous peripheral portions of the bases and the container body ends, comprising supporting a container body, inserting a recessed portion of a base within one end of the container body, a bent over peripheral portion of the base and a bent over peripheral portion of the container body end freely overlying each other with the base peripheral portion extending radially beyond the container end peripheral portion, moving a seaming tool radially towards the still free edges of said peripheral portions while effecting continuous rotary movement of said container body and base relative to said tool about the longitudinal axis of said container body to force said base peripheral portion alone on itself in a continuous roll-over movement around the edge of the container end peripheral portion until the outer extremity of the base peripheral portion faces said container end peripheral portion, and effecting further movement of said tool radially inwardly with respect to said base and container body progressively to roll said base peripheral portion and said container end peripheral portion together over each other during which further movement said outer extremity of said base peripheral portion is displaced relative to its position facing said container end peripheral portion and continuing said further movement until a roll-over joint between said base and container end peripheral portions is formed which consists of seven superposed alternating thicknesses of said base and container body peripheral portions. .Iaddend. .Iadd. 6. A process of connecting bases in the ends of metal container bodies by seaming together contiguous peripheral portions of the bases and the container body ends, comprising supporting a container body, inserting a recessed portion of a base within one end of the container body, a bent over peripheral portion of the base and a bent over peripheral portion of the container body end overlying each other with the base peripheral portion extending radially beyond the container end peripheral portion, moving a seaming tool radially towards the edges of said peripheral portions while effecting continuous rotary movement of said container body and base relative to said tool about the longitudinal axis of said container body to force said base peripheral portion on itself in a continuous roll-over movement around the edge of the container end peripheral portion until the edge of the base peripheral portion faces said container end peripheral portion, thereafter driving the edge of the base peripheral portion radially outwardly along the container peripheral portion, and effecting further movement of said tool radially inwardly with respect to said base and container body progressively to roll said base peripheral portion and said container end peripheral portion together over each other until a roll-over joint between said base and container end peripheral portions is formed which consists of seven superposed thicknesses of said base and container body peripheral portions. .Iaddend..Iadd. 7. A process of connecting bases in the ends of metal container bodies by seaming together contiguous peripheral portions of the bases and the container body ends, comprising supporting a container body, inserting a recessed portion of a base within one end of the container body, a bent over peripheral portion of the base and a bent over peripheral portion of the container body end overlying each other with the base peripheral portion extending radially beyond the container end peripheral portion, moving a seaming tool radially towards the edges of said peripheral portions while effecting continuous rotary movement of said container body and base relative to said tool about the longitudinal axis of said container body to force said base peripheral portion on itself in a continuous roll-over movement around the edge of the container end peripheral portion until the base peripheral portion forms an initial rolled section with its outer edge disposed along a line spaced from said container body, and effecting further movement of said tool radially inwardly with respect to said base and container body progressively and causing said base peripheral portion and said container end peripheral portion to roll together over each other while the outer edge face of said base peripheral portion is displaced along said container end peripheral portion relative to its position upon the completion of the initial rolled section until said edges of said peripheral portion interengage thus forming a roll-over joint between said base and container end peripheral portions which consists of seven superposed thicknesses of said base and container body peripheral portions. .Iaddend..Iadd. 8. A process of connecting bases in the ends of metal container bodies by seaming together contiguous peripheral portions of the bases and the container body ends, comprising supporting a container body, inserting a recessed portion of a base within one end of the container body, a bent over peripheral portion of the base and a bent over peripheral portion of the container body end overlying each other with the base peripheral portion extending radially beyond the container end peripheral portion, moving a seaming tool radially towards the edges of said peripheral portions while effecting continuous rotary movement of said container body and base relative to said tool about the longitudinal axis of the container body (a) initially to roll the outer edge of said base peripheral portion through substantially 270° around the outer edge of the container peripheral portion until said outer edge of the base peripheral portion comes into substantially immediate facing relation with the container peripheral portion along a line spaced inwardly from the edge of the container peripheral portion on the surface thereof which is continuous with the outside surface of the container, and (b) then to roll both the base and container body peripheral portions together while allowing relative displacement over one another until the container body portion has been rolled through substantially 270°, and then continuing deformation of the resulting rolled, interengaged base and container body peripheral portions thereby forming a seam consisting of seven superposed thicknesses of alternate base and container body. .Iaddend.