Snap-on, screw-off cap with tamper-evidencing skirt and container neck

  • US 5,975,321 A
  • Filed: 05/01/1998
  • Issued: 11/02/1999
  • Est. Priority Date: 08/09/1990
  • Status: Expired due to Fees
First Claim
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1. In combination, a container having a neck and a container closure,said neck having an upper opening, a lip surrounding said opening, a downward extending neck stretch below said lip, said neck stretch having an exterior, multiple neck helical engagement means on said exterior of said neck stretch, a locking wall below said neck stretch, and a plurality of external teeth on said locking wall,said closure having a top, a downward extending upper skirt depending from said top adapted to fit over said neck stretch, said upper skirt having an interior, multiple closure helical engagement means on said interior of said upper skirt shaped to engage said neck helical engagement means, a tamper-evidencing band frangibly attached to said upper skirt, a plurality of internal teeth on said tamper-evidencing band interengaging said external teeth to prevent unscrewing of said closure from said neck so long as said tamper-evidencing band is intact,said neck and closure helical engagement means being shaped and said closure being resilient so that upon application of force to accomplish direct, axial movement of said closure relative to said container without externally imposed relative rotation of said closure and said neck, said neck and closure helical engagement means slip past each other and then interengage and said closure seats on said neck so that said closure cannot be removed from said neck without unscrewing said closure,said external teeth having a bevel slanted downwardly and outwardly from said locking wall, said bevel guiding said internal teeth and said external teeth into side-by-side interengagement upon contact between at least one of said internal teeth and said bevel of at least one of said external teeth during said direct, axial movement of said closure relative to said neck.

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