Pail and plastic lid comprising non-linear, flexible ribs

A plastic lid for a pail, said lid having a substantially planar central section and a peripheral channel, said channel fitting over the pail to effect closure thereof, said central section being spaced from the channel by a groove and a ridge, each of which extend around the lid juxtaposed to the channel, with the groove being adjacent to the channel, said groove having a plurality of sinusoidal flexible ribs therein extending across the width of the groove.

A plastic lid for a pail, said lid having a substantially planar central section and a peripheral channel, said channel fitting over the pail to effect closure thereof, said central section being spaced from the channel by a groove and a ridge, each of which extend around the lid juxtaposed to the channel, with the groove being adjacent to the channel, said groove having a plurality of S-shaped flexible ribs therein extending across the width of the groove.

A plastic pail with a plastic lid, said lid having a substantially planar central section and a peripheral channel, said channel fitting over the pail to effect closure thereof, said central section being spaced from the channel by a groove and a ridge, each of which extend around the lid juxtaposed to the channel, with the groove being adjacent to the channel, said groove having a plurality of U-shaped flexible ribs therein extending across the width of the groove.

A plastic pail with a plastic lid, said lid having a substantially planar central section and a peripheral channel, said channel fitting over the pail to effect closure thereof, said central section being spaced from the channel by a groove and a ridge, each of which extend around the lid juxtaposed to the channel, with the groove being adjacent to the channel, said groove having a plurality of sinusoidal flexible ribs therein extending across the width of the groove.

A plastic pail with a plastic lid, said lid having a substantially planar central section and a peripheral channel, said channel fitting over the pail to effect closure thereof, said central section being spaced from the channel by a groove and a ridge, each of which extend around the lid juxtaposed to the channel, with the groove being adjacent to the channel, said groove having a plurality of S-shaped flexible ribs therein extending across the width of the groove.

A plastic lid for a pail, said lid having a substantially planar central section and a peripheral channel, said channel fitting over the pail to effect closure thereof, said central section being spaced from the channel by a groove and a ridge, each of which extend around the lid juxtaposed to the channel, with the groove being adjacent to the channel,

• said groove having a plurality of non-linear flexible ribs therein extending across the width of the groove, said non-linear flexible ribs being U-shaped and undergoing flexing when subjected to compression and exerting a force opposing said compression.

A plastic lid for a pail, said lid having a substantially planar central section and a peripheral channel, said channel fitting over the pail to effect closure thereof, said central section being spaced from the channel by a groove and a ridge, each of which extend around the lid juxtaposed to the channel, with the groove being adjacent to the channel,

• said groove having a plurality of non-linear flexible ribs therein extending across the width of the groove, said non-linear flexible ribs being sinusoidal and undergoing flexing when subjected to compression and exerting a force opposing said compression.

A plastic lid for a pail, said lid having a substantially planar central section and a peripheral channel, said channel fitting over the pail to effect closure thereof, said central section being spaced from the channel by a groove and a ridge, each of which extend around the lid juxtaposed to the channel, with the groove being adjacent to the channel,

• said groove having a plurality of non-linear flexible ribs therein extending across the width of the groove, said non-linear flexible ribs being S-shaped and undergoing flexing when subjected to compression and exerting a force opposing said compression.

A plastic pail with a plastic lid, said lid having a substantially planar central section and a peripheral channel, said channel fitting over the pail to effect closure thereof, said central section being spaced from the channel by a groove and a ridge, each of which extend around the lid juxtaposed to the channel, with the groove being adjacent to the channel,

• said groove having a plurality of non-linear flexible ribs therein extending across the width of the groove, said non-linear flexible ribs being U-shaped and undergoing flexing when subjected to compression and exerting a force opposing said compression.

A plastic pail with a plastic lid, said lid having a substantially planar central section and a peripheral channel, said channel fitting over the pail to effect closure thereof, said central section being spaced from the channel by a groove and a ridge, each of which extend around the lid juxtaposed to the channel, with the groove being adjacent to the channel,

• said groove having a plurality of non-linear flexible ribs therein extending across the width of the groove, said non-linear flexible ribs being sinusoidal and undergoing flexing when subjected to compression and exerting a force opposing said compression.

A plastic pail with a plastic lid, said lid having a substantially planar central section and a peripheral channel, said channel fitting over the pail to effect closure thereof, said central section being spaced from the channel by a groove and a ridge, each of which extend around the lid juxtaposed to the channel, with the groove being adjacent to the channel,

• said groove having a plurality of non-linear flexible ribs therein extending across the width of the groove, said non-linear flexible ribs being S-shaped and undergoing flexing when subjected to compression and exerting a force opposing said compression.