PAIL

• US 3,759,415 A
• Filed: 06/13/1972
• Issued: 09/18/1973
• Est. Priority Date: 06/13/1972
• Status: Expired due to Term

• Current Assignee: Harold S. Cloyd
• Original Assignee: Harold S. Cloyd
• Inventors: Cloyd, Harold S.
• Primary Examiner(s): Ross, Herbert F.
• Assistant Examiner(s): Pollard, Steven M.
• Application Number:
  US05/262,934
• Time in Patent Office: 462 Days
• Field of Search: 220/60 150/.5 215/40
• US Class Current: 220/784
• CPC Class Codes: B65D 2543/00194 square or rectangular
• CPC Class Codes: B65D 2543/00296 Plastic
• CPC Class Codes: B65D 2543/005 both cup and skirt
• CPC Class Codes: B65D 2543/00537 on the outside, or a part turned to the outside of the mouth of the container
• CPC Class Codes: B65D 2543/00555 on both the inside and the outside
• CPC Class Codes: B65D 2543/00574 secured locally, i.e. a lot less than half the periphery
• CPC Class Codes: B65D 2543/00583 Means for limiting the axial insertion of the lid on the container
• CPC Class Codes: B65D 2543/00657 U-shaped or inverted U
• CPC Class Codes: B65D 2543/00685 Totality
• CPC Class Codes: B65D 2543/00759 Flange or lip
• CPC Class Codes: B65D 2543/00768 U-shaped or inverted U
• CPC Class Codes: B65D 2543/00805 Segments
• CPC Class Codes: B65D 2543/0099 Integral supplemental sealing lips
• CPC Class Codes: B65D 43/0212 only on the outside, or a part turned to the outside, of the mouth B65D43/0206 takes precedence

Abstract

A plastic pail having a rim with integral, upwardly diverging peripheral lips received in and compressed by a downwardly presented peripheral groove in a cover to make a fluid tight seal.

Claims

1. A plastic pail having a rim with integral peripheral lips diverging upwardly from the rim, a cover having a downwardly presented peripheral groove telescoped over the upper edges of the lips, said groove having inner wall surfaces spaced closer together than the unstressed spacing of the uppermost outer edges of the lips which are compressed by said wall surfaces to effect a fluid tight seal between the cover and pail by static deflection of the lips, and said groove having a bottom wall spaced above said edges of the lips whereby the pressure of fluid trapped between said lips and said bottom wall aids in effecting said fluid tight seal by exerting a spreading force on the lips in the direction to move the lips into tighter engagement with said wall surfaces.

2. The pail of claim 1 in which the lips and groove in plan view consist of alternate straight and curved sections joined end to end around the periphery of the rim.

3. The pail of claim 1 in which the rim of the pail has at its outer edge a vertical peripheral flange with the lips diverging upwardly from the upper edge of said vertical flange.

4. The pail of claim 3 in which the rim of the pail has an outwardly extending horizontal flange and the vertical peripheral flange is at the outer edge of said horizontal flange.

5. The pail of claim 2 in which the cover has hold down members and the pail has detent means both located on said straight sections.

6. The pail of claim 5 in which the hold down members are hinged to the cover.

7. The pail of claim 2 in which at least one of the straight sections has an inwardly extending vertical convolution at its mid section.