Method and apparatus for forming containers
View Patent ↗A method and apparatus are disclosed for forming containers. The containers may be cans, including composite cans. The apparatus may include a cylindrical mandrel and a blank may be formed into a cylindrical tube around the mandrel. Rotational apparatuses may engage portions of a blank that may be in a flat configuration and may rotate the portions around the outward cylindrical surface of the mandrel. Free edges of the tubular blank may be sealed by a sealing strip that may be T-shaped in cross section. A cup may be installed in an end opening, such as a bottom end, of the cylindrical tube. The cup may be sealed in the end opening by a seaming process using a seaming apparatus.
1 . A system for forming a container from a re-configurable blank, said system comprising:
(a) a blank support device having a generally cylindrical outward facing surface, said blank support device being positioned such that during operation, said outward facing surface of said blank support device is located proximate said blank while said blank is in a first configuration;
(b) a rotating sub-system operable to rotate said blank around the outward facing surface of said blank support device to form a generally cylindrical tubular side wall configuration around said outward surface of said blank support device;
(c) a bottom forming subsystem and a blank support movement subsystem;
wherein in operation, after said blank is formed into said generally cylindrical tubular side wall configuration by said rotating sub-system, said blank support movement subsystem is operable to move said blank on said case blank support device to a bottom forming station, where said bottom forming subsystem is located, and said bottom forming sub-system is operable for forming a bottom portion of said container by installing a circular bottom cup in a circular bottom opening of said tubular side wall configuration of said blank.
2 . A system as claimed in claim 1 wherein said bottom forming subsystem comprises a seaming apparatus, and wherein in operation, said bottom cup is installed in said bottom opening by said seaming apparatus that is operable to perform a seaming process to create a seam between a bottom circumferential edge of said tubular side wall configuration of said blank and a circumferential edge region of said bottom cup.
3 . A system as claimed in claim 1 wherein during said movement of said blank with said case blank support device to said bottom forming station, said sealing strip is moved therewith and said supply of sealing material delivers another sealing strip for use with a subsequent blank to be formed.
4 . A system as claimed in claim 3 wherein said rotating subsystem is further operable to interconnect the first and second portions of the blank to secure said blank in said generally cylindrical tubular side wall configuration; wherein in operation, said rotating subsystem brings a free edge of the first portion and a free edge of the second portion of said blank into close proximity with each other and interconnecting the free edges of the first and second portions of the blank to thereby form said blank to provide a generally tubular cylindrical side wall configuration around said outward facing surface of said blank support device.
5 . A system as claimed in claim 4 , wherein said free edges of said first and second portions of said blank are interconnected by a sealing strip that is interconnected to both said first and second portions.
6 . A system as claimed in claim 5 wherein said sealing strip has a generally T-shape in cross section and comprises a first top portion that bonds to inner surfaces of first and second portions of said blank and across a joint between the first and second portions of the blank, and said sealing strip comprises a base portion that is received between and bonds opposing edge faces of said first and second portions of said blank.
7 . A system as claimed in claim 6 wherein said top of said sealing strip is positioned against inner surface regions of said first and second portions of said blank.
8 . A system as claimed in claim 7 wherein in operation, during the rotation of said blank around the outward facing surface of said blank support device to form a generally cylindrical tubular side wall configuration, said top of said sealing strip is positioned within a slot of said blank support device.
9 . A system as claimed in claim 1 , wherein said container is a composite can.