Method for forming a shell for a can type container

Details Method for forming a shell for a can type container Method for forming a shell for a can type container

1988-02-05

1989-09-05

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72348, 72329, B21D 5144, B21D 2802

Patent

active

048627224

ABSTRACT:
The disclosure relates to a novel shell such as used in the manufacture of can ends, and to a method and tools for making such a shell. A non-circular blank having rounded corners is cut from thin metal. The blank is oblong in a direction transverse to the grain of the metal. A first set of tools separates the blanks and forms a substantially flat central panel and an upward-extending chuck wall about the edge of the panel to produce a partially formed shell. The junction area between the panel and the chuck wall has a relatively large radius of curvature at this time. A second set of tools forms in the blank a lip extending outward from the upper end of the chuck wall and generally parallel to the panel; then the panel and the chuck wall are separately gripped, followed by relative movement between the panel and the chuck wall while wrapping the junction area around a forming punch to form a panel wall in the junction area extending upward from the inner part of the chuck wall. Then the lip is formed into a curl edge section which ends in an inner curl diameter that is round and concentric with the chuck wall, and has progressively lesser radii of curvature from upper end of the chuck wall to the inner curl diameter. The resulting shell is characterized by a curl diameter being round and concentric with the chuck wall and essentially uniformly spaced therefrom, and by having an essentially constant thickness throughout the central panel, the panel wall and chuck wall and the curved section therebetween.

REFERENCES:
patent: Re29645 (1978-05-01), Kaminski
patent: 2166501 (1939-07-01), MacCordy
patent: 2291243 (1942-07-01), Levy
patent: 2801884 (1957-08-01), Friedman
patent: 2820542 (1958-01-01), Oswald
patent: 2840026 (1958-06-01), Eggert
patent: 3080983 (1963-03-01), Blatt
patent: 3367533 (1968-02-01), Baker
patent: 3387543 (1968-06-01), Beckers
patent: 3391590 (1968-07-01), Stein
patent: 3409168 (1968-11-01), Chmielowiec
patent: 3434325 (1969-03-01), Podesta et al.
patent: 3537291 (1970-11-01), Hawkins
patent: 3593552 (1971-07-01), Froze
patent: 3683665 (1972-08-01), Bradke
patent: 3704618 (1972-12-01), Cvacka et al.
patent: 3715054 (1973-02-01), Gedde
patent: 3768295 (1973-10-01), Cudzik
patent: 3866471 (1975-02-01), Carroll et al.
patent: 3874740 (1975-04-01), Hurd
patent: 3911719 (1975-10-01), Degenkardt et al.
patent: 3948162 (1976-04-01), Numba
patent: 3952677 (1976-04-01), Hartman et al.
patent: 3953076 (1976-04-01), Hurd
patent: 3957005 (1976-05-01), Heffner
patent: 3998174 (1976-12-01), Saunders
patent: 4005665 (1977-02-01), Nichihara et al.
patent: 4026226 (1977-05-01), Hahn et al.
patent: 4030432 (1977-06-01), Miller et al.
patent: 4037550 (1977-07-01), Zofko
patent: 4040282 (1977-08-01), Saunders
patent: 4062213 (1977-12-01), Schneider et al.
patent: 4093102 (1978-06-01), Krasaka
patent: 4096731 (1978-06-01), Uehlinger et al.
patent: 4120185 (1978-10-01), Schneider et al.
patent: 4157693 (1979-06-01), Openclowski et al.
patent: 4215795 (1980-08-01), Elser
patent: 4254886 (1981-03-01), VanDoren
patent: 4289014 (1981-09-01), Maeder et al.
patent: 4291567 (1981-09-01), Musayama
patent: 4364255 (1982-12-01), Byrd
patent: 4382737 (1983-05-01), Jensen et al.
patent: 4425778 (1984-01-01), Franek et al.
patent: 4446714 (1984-05-01), Cvacho
patent: 4448322 (1984-05-01), Kraska
patent: 4516420 (1985-05-01), Bulso, Jr. et al.
patent: 4516420 (1985-05-01), Bulso et al.
patent: 4554814 (1985-11-01), Grow et al.
patent: 4561280 (1985-12-01), Bachmann et al.
patent: 4571987 (1986-02-01), Taube et al.
patent: 4587825 (1986-05-01), Bulso et al.
patent: 4603571 (1986-08-01), Wessels
patent: 4606472 (1986-08-01), Taube et al.
patent: 4641761 (1987-02-01), Smith et al.

Affiliated with

Also associated with

Rating

Method for forming a shell for a can type container does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for forming a shell for a can type container, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for forming a shell for a can type container will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-233999