Self-opening can lid with improved contour of score

Details Self-opening can lid with improved contour of score Self-opening can lid with improved contour of score

1990-11-21

1991-11-12

Marcus, Stephen

Receptacles

Closures

With closure opening arrangements for means

220270, B65D 1732

Patent

active

050640879

ABSTRACT:
An easy-open container end includes a displaceable panel defined by a score line having curved tails which is in parallel relationship with adjacent means for reinforcing, thereby reducing opening failures, while controlling tearing. A score die and anvil is further provided wherein a four bolt pattern provides greater resistance to distortion and more even mounting stress distribution, resulting in more even score line residuals and reduced opening failures.

REFERENCES:
patent: 4084721 (1978-04-01), Perry
patent: 4148410 (1979-04-01), Brown
patent: 4184607 (1980-01-01), Potts
patent: 4210257 (1980-07-01), Radtke
patent: 4211335 (1980-07-01), Langseder
patent: 4219127 (1980-08-01), Bielicki
patent: 4276993 (1981-07-01), Hasegawa
patent: 4286728 (1981-09-01), Fraze et al.
patent: 4465204 (1984-08-01), Kaminski et al.

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