Container end forming system
AssigneeDayton Systems Group, Inc.
InventorsStephen T. Cook, Dale R. Conley, Mark F. Broerman
Life of this patent
Estimating the term…
Abstract
Thread lug forming systems form thread lugs (36) on container necks or necked end domes. A continuously rotating cam system (100) has multiple sets of thread lug forming tools (135) which are driven to recirculate about stationary cams (130). The cams actuate inner and outer forming tools (150, 152) of the tool sets as they progress around the cams to form the thread lugs. A second system uses generally the same tool sets in a multiple-station reciprocating press (203), and the container bodies are indexed through the tool stations (252) in which the thread lugs are formed.
Claims11
A method of forming multiple thread lugs around and protruding outward from a neck for a container, the neck having a pour opening for container contents, comprising:
- entering thread lug punches into the neck through said openings;
- locating thread lug dies about the exterior of the neck aligned with said thread lug punches inside the neck;
- pivoting the thread lug dies by the thread lug punches about respective pivot axes;
- and,
- pressing the thread lug punches and the thread lug dies toward each other and against the neck to reform portions of the wall of the neck into a plurality of circumferentially extending and circumferentially spaced apart thread lugs projecting outwardly from the neck in predetermined alignment about the neck and at a predetermined spacing from the pour opening.
Apparatus for forming thread lugs on a neck for a container end, the neck having a curl defining a pour opening for container contents, comprising:
- cooperating punch and die tooling means configured for forming more than two, circumferentially spaced multiple thread lugs around and protruding outward from said neck by reforming portions of the wall of said neck into more than two circumferentially extending, circumferentially spaced apart lugs projecting outwardly from said neck in predetermined alignment about said neck and at a predetermined spacing from said curl;
- said punch and die tooling means being operatively supported in a tool holder having a central opening;
- a set of arms suspended in said central opening on respective pivots defining inward and outward motion of said punch and die tooling means between a retracted position surrounding the neck and a forming position pressing together against opposite side of the neck to reform the neck material into predetermined thread lug configuration;
- means for supporting said container neck in a predetermined position;
- and,
- cooperating thread lug forming means for locating said tool holder around the neck, bringing the punch and die tooling means into contact with the neck at a predetermined distance from said curl, and retracting the punch and die tooling means upon formation of a set of thread lugs in the neck.
Dependencies are inferred from the claim text.