CA3115491A1 - Lid with sealing protuberances - Google Patents

Abstract

A pail includes a container and a lid. The container includes a base, a container sidewall extending upwardly from the base to an upper rim, and a sealing rib extending from the container sidewall adjacent to the upper rim. The lid includes a channel for receiving the upper rim of the container, the channel includes a channel base, a plurality of protuberances arranged spaced apart on an inner surface of the channel base and extending downwardly therefrom, a first channel sidewall, and a sealing shoulder that projects inwardly from the first channel sidewall. When the upper rim of the container is received by the channel of the lid, the protuberances abut the upper rim and the sealing rib engages the first channel sidewall and the sealing shoulder. The protuberances can urge the sealing rib downwardly against the sealing shoulder, to thereby form a seal.

Description

TITLE: LID WITH SEALING PROTUBERANCES
FIELD
[1] The present disclosure relates generally to lids for sealing the open end of a container, and, more specifically, to gasketless lids.
BACKGROUND

[2] The following paragraphs are not an admission that anything discussed in them is prior art or part of the knowledge of persons skilled in the art.

[3] U.S. Patent No. 4,887,736 describes a container assembly that has a lid for closing and sealing the open end of the container. The container includes an outwardly curled sealing lip at its upper most periphery. The lid includes a rim having inner and out legs, and a bridge or web connecting the legs. The legs and the bridge define a downwardly opening channel proportioned to fit over the lip of the container. The legs, bridge and the lip cooperatively define therebetween a sealant cavity or the cavity may be formed only in the bridge. The sealant cavity includes a sealing material received therein. The lid further includes contact surface means. The contact surface means selectively contact the container lip to limit the minimum size of the cavity when the lid is pressed onto the container.
By limiting the minimum size of the cavity, over compression of the sealing material is avoided during application of an excessive load on the container lid.

[4] U.S. Patent No. 6,126,027 discloses a self-centering container closure including a locator annulus which extends downwardly from the undersurface of the crown, radially inwardly from a resilient fin. The annulus extends downwardly by a distance greater than the fin and has an outer diameter slightly smaller than that of the inner diameter of the neck of the container with which it is to be used.
The annulus assists with centering the closure on the container as the closure is screwed onto the container.

Date Recue/Date Received 2021-04-16

[5] U.S. Patent No. 7,090,088 discloses a combination molded plastic bucket and lid that includes a series of outwardly extending ribs on the top edge of the bucket and inwardly extending flanges on a depending outer skirt of the lid which engaged with the bucket ribs to provide a wedging action that holds the lid tightly in a sealing position on the top of the bucket. A zig-zag tear strip permits removal of a portion of the lowermost lid flange. The top of the bucket includes a groove adapted to receive a projection or tongue seal.

[6] U.S. Patent No. 9,738,423 discloses a cap for closing a container, the container having a neck with an upper edge defining a discharge opening. The cap comprises a lid and a seal gasket for sealingly engaging the neck of the container. The lid has at least one inwardly extending projection for supporting the seal gasket.
SUMMARY

[7] The following summary is intended to introduce the reader to various aspects of the present disclosure, but not to define any invention.

[8] According to some aspects, a pail is disclosed. The pail can include: a container including a base, a container sidewall extending upwardly from the base to an upper rim, and a sealing rib extending from the container sidewall adjacent to the upper rim; and a lid including a channel for receiving the upper rim of the container, the channel including a channel base, a plurality of protuberances arranged spaced apart on an inner surface of the channel base and extending downwardly therefrom, a first channel sidewall, and a sealing shoulder that projects inwardly from the first channel sidewall, wherein, when the upper rim of the container is received by the channel of the lid, the protuberances abut the upper rim and the sealing rib engages the first channel sidewall and the sealing shoulder.

Date Recue/Date Received 2021-04-16

[9] In some examples, the protuberances urge the sealing rib downwardly against the sealing shoulder, to thereby form a seal. The channel base can include an inner end and an outer end, and the first channel sidewall can extend downwardly from the outer end of the channel base. The sealing rib can extend outwardly from the container sidewall. The sealing rib can include an upper rib surface, a lower rib surface, and a distal rib surface that extends between upper and lower rib surfaces. When the upper rim of the container is received by the channel of the lid, the lower rib surface can abut the sealing shoulder and the distal rib surface can abut the first channel sidewall, to thereby form the seal. The upper rib surface can define a topmost surface of the upper rim. The protuberances can bear against upper rib surface, which can thereby urges the lower rib surface downwardly against the sealing shoulder. The channel can include a second channel sidewall, and the second channel sidewall can extend downwardly from the inner end the channel base. The second channel sidewall can urge the distal rib surface outwardly against the first channel sidewall.
A
channel width can be smaller than a rib dimension so that there is an interference fit therebetween. The second channel sidewall can include at least one wiper element that projects outwardly to cause the distal rib surface to bear outwardly against the first channel sidewall.

[10] In some examples, the protuberances are spaced apart regularly within the channel so that a pitch distance between adjacent protuberances is generally uniform about a perimeter of the lid. The lid can have between 50 to 250 of the protuberances disposed within the channel. The lid can have between 150 to 180 of the protuberances disposed within the channel. Each of the protuberances can have a height of between about 0.05 inches to 0.07 inches from the inner surface of the channel base. Each of the protuberances can be generally circular in cross section and can have a diameter of between about 0.04 inches to 0.051 inches.
Each of the protuberances can be generally cylindrical in shape and can have a generally hemispherical outer end.

Date Recue/Date Received 2021-04-16

[11] In some examples, the lid does not include a gasket.

[12] According to some aspects, a lid for sealing an open end of a container is disclosed, the container including an upper rim and a sealing rib. The lid can include: a channel including a channel base, a plurality of protuberances arranged spaced apart on an inner surface of the channel base and extending downwardly therefrom, a first channel sidewall, and a sealing shoulder that projects inwardly from the first channel sidewall, wherein, when the upper rim of the container is received by the channel of the lid, the protuberances abut the upper rim and the sealing rib engages the first channel sidewall and the sealing shoulder.

[13] In some examples, the channel base includes an inner end and an outer end, and the first channel sidewall extends downwardly from the outer end of the channel base. The channel can include a second channel sidewall, and the second channel sidewall can extend downwardly from the inner end the channel base. The second channel sidewall can include at least one wiper element that projects outwardly. The protuberances can be spaced apart regularly within the channel so that a pitch distance between adjacent protuberances is generally uniform about a perimeter of the lid. The lid can have between 50 to 250 of the protuberances disposed within the channel. The lid can have between 150 to 180 of the protuberances disposed within the channel. Each of the protuberances can have a height of between about 0.05 inches to 0.07 inches from the inner surface of the channel base. Each of the protuberances can be generally circular in cross section and can have a diameter of between about 0.04 inches to 0.051 inches.
Each of the protuberances can be generally cylindrical in shape and can have a generally hemispherical outer end.

[14] In some examples, the lid does not include a gasket.

Date Recue/Date Received 2021-04-16 BRIEF DESCRIPTION OF THE DRAWINGS

[15] The drawings included herewith are for illustrating various examples of apparatuses of the present disclosure and are not intended to limit the scope of what is taught in any way. In the drawings:
Figure 1 is top perspective view of an example lid;
Figure 2 is a bottom perspective view of the lid of Figure 1;
Figure 3 is a bottom view of the lid of Figure 1;
Figure 4 is an enlarged partial view of the lid of Figure 3 taken at area 4;
Figure 5 is a partial sectional view of the lid of Figure 3 taken along line 5-5;
Figure 6 is a sectional view of a pail, including the lid of Figure 3 (taken along line 6-6) and a container;
Figure 7 is a sectional view of the pail of Figure 6, in which the lid is shown connected to the container;
Figure 8 is an enlarged partial view of the pail of Figure 7 taken at area 8;
Figure 9 is a top view of another example lid;
Figure 10 is a bottom view of the lid of Figure 9;
Figure 11 is a sectional view of the lid of Figure 9 taken along line 11-11;
Figure 12 is an enlarged partial view of the lid of Figure 11 taken at area 12;

Date Recue/Date Received 2021-04-16 Figure 13 is a sectional view of another example of a pail, including the lid of Figure 9 (taken along line 11-11) connected to a container, the pail shown stacked on top of another lid; and Figure 14 is an enlarged partial view of the pail of Figure 13 taken at area 14.
DESCRIPTION OF EXEMPLARY EMBODIMENTS

[16] Various apparatuses will be described below to provide an example of an embodiment of each claimed invention. No embodiment described below limits any claimed invention and any claimed invention may cover apparatuses that differ from those described below. The claimed inventions are not limited to apparatuses having all of the features of any one apparatus described below or to features common to multiple or all of the apparatuses described below. It is possible that an apparatus described below is not an embodiment of any claimed invention. Any invention disclosed in an apparatus described below that is not claimed in this document may be the subject matter of another protective instrument, for example, a continuing patent application, and the applicants, inventors, or owners do not intend to abandon, disclaim, or dedicate to the public any such invention by its disclosure in this document.

[17] A pail typically includes a container and a removable lid that can be used to close an open end of the container. Pails can be used to ship and store a variety of materials, including fluids and flowable materials. Some pails have a fluid tight seal between the container and the lid. The structure and components of the pail can affect the quality of seal that is formed between the container and the lid. Some pails use a gasket to form a seal between the container and the lid.

[18] The present disclosure relates to lids for closing an open end of a container. The lids, when used to cover the open end of a container, may provide a fluid tight seal without the use of a gasket.

Date Recue/Date Received 2021-04-16

[19] Referring to Figures 1 and 2, an example of a lid is shown generally at reference numeral 100. In the example illustrated, the lid 100 includes a panel 102 and a channel 104. The channel 104 is open from the bottom side of the lid 100, and extends about the panel 102 along a perimeter of the lid 100.

[20] Referring to Figure 3, the lid 100 includes a plurality of protuberances 106.
In the example illustrated, the protuberances 106 are disposed within the channel 104 and are spaced apart along the perimeter of the lid 100. In the example illustrated, the lid 100 and the channel 104 are each generally circular in shape;
however, other shapes are possible.

[21] Referring to Figure 4, the protuberances 106 can be spaced apart regularly within the channel 104 so that a pitch distance 108 between adjacent protuberances, e.g. 106a and 106b, can be generally uniform about the perimeter of the lid 100. In other examples, the distance 108 between adjacent protuberances can vary.

[22] Referring to Figure 5, the channel 104 can be defined by a plurality of molded walls 110. In the example illustrated, the channel 104 includes a channel base 112 and a first channel sidewall 114. As shown, the protuberances 106 are arranged on an inner surface of the channel base 112 and extend downwardly therefrom. The channel base 112 as shown has an inner end 116 and an outer end 118. In the example illustrated, the first channel sidewall 114 extends downwardly from the outer end 118 of the channel base 112. In the example illustrated, a hook or sealing shoulder 122 projects inwardly from the first channel sidewall 114. In the example illustrated, the channel 104 further includes a second channel sidewall 120, which extends from the inner end 116 of the channel base 112.

[23] Referring to Figure 6, an example of a container is shown generally at reference numeral 124. In the example illustrated, the container 124 includes a base 126 and a container sidewall 128 that extends upwardly from the base 126 Date Recue/Date Received 2021-04-16 to an upper rim 130. The upper rim 130 defines an open end 132 of the container 124. The channel 104 of the lid 100 is configured to receive the upper rim 130 of the container 124 so that the lid 100 covers the open end 132 of the container 124. In the example illustrated, the container sidewall 128 is generally cylindrical in shape; however, other shapes are possible.

[24] In the example illustrated, the container 124 further includes a sealing rib 134 that extends from the container sidewall 128. In the example illustrated, the sealing rib 134 extends outwardly from the container sidewall 128, adjacent to the upper rim 130.

[25] Referring to Figure 7, in a closed position, the lid 100 and the container 124 together form a pail 136.

[26] Referring to Figure 8, when the upper rim 130 of the container 124 is received by the channel 104, the protuberances 106 abut the upper rim 130 and the sealing rib 134 engages the first channel sidewall 114 and the sealing shoulder 122. In the example illustrated, the protuberances 106 urge the sealing rib 134 downwardly against the sealing shoulder 122, which can thereby form a seal.

[27] In the example illustrated, the sealing rib 134 includes an upper rib surface 138, a lower rib surface 140, and a distal rib surface 142 that extends between the surfaces 138, 140. In the example illustrated, the upper rib surface 138 defines a topmost surface of the upper rim 130. In the example illustrated, the protuberances 106 bear against upper rib surface 138, which thereby urges the lower rib surface 140 downwardly against the sealing shoulder 122.

[28] In the example illustrated, the second channel sidewall 120 urges the distal rib surface 142 outwardly against the first channel sidewall 114. A
channel width 144 (see Figure 5) can be selected to be smaller than a rib dimension (see Figure 6) so that there is an interference fit between these components.
An Date Recue/Date Received 2021-04-16 interference dimension 148 is shown in Figure 8. For example, and not intended to be limiting, the dimension 148 can be about 0.005 inches.

[29] In the example illustrated, the second channel sidewall 120 includes wiper elements 150, 152 that project outwardly and further cause the distal rib surface 142 to bear outwardly against the first channel sidewall 114. In the example illustrated, the wiper elements 150, 152 are spaced apart and offset downwardly from the sealing shoulder 122.

[30] Accordingly, with the upper rim 130 received by the channel 104, the lower rib surface 140 abuts the sealing shoulder 122 and the distal rib surface 142 abuts the first channel sidewall 114. As illustrated, this arrangement can result in an effective seal between the lid 100 and the container 124 when in the closed position. In some examples, the seal between the lid 100 and the container 124 can be fluid tight.

[31] Referring again to Figures 3 and 4, because the protuberances 106 do not form a continuous rib about the perimeter of the lid 100, the lid 100 can generally maintain its flexibility, which can reduce the amount of force that is required to close the lid 100 onto the container 124 and/or open it again. Although fewer protuberances 106 can increase flexibility of the lid 100, the number of protuberances 106 must not be so few that engagement between the protuberances 106 and the upper rim 130 is insufficient to promote a desired seal.

[32] The number of protuberances can vary and can depend on the size of the lid. For example, a lid for covering a large container can require more protuberances than a lid for covering a small container. Moreover, the number of protuberances can depend on the size and shape of each of the protuberances, which can also determine the surface area of each protuberance contacting the upper rim of the container.

Date Recue/Date Received 2021-04-16

[33] For example, and not intended to be limiting, for lids having a diameter between 7 inches and 13 inches, the number of the protuberances can range between 50 and 250. In the specific example illustrated, the lid 100 has a bottom edge diameter 154 (see Figure 3) of about 8.352 inches and there are 150 of the protuberances 106 spaced about the perimeter of the lid 100. In the specific example illustrated, the pitch distance 108 (see Figure 4) is about 0.125 inches, and each of the protuberances 106 has a diameter 156 (see Figure 4) of about 0.04 inches and a height 158 (see Figure 5, measured from the inner surface of the channel base 112) of about 0.05 inches. Therefore, in the example illustrated, the space between the protuberances is about 3 times the diameter of each.

[34] It should also be appreciated that the shape of the protuberances can vary. In the example illustrated, each of the protuberances 106 consists of a cylinder with a hemispherical outer end. In some examples, not shown, the protuberances can be block-shaped, or pyramidal. In some examples, not shown, the protuberances can be connected by a web of material that extends between adjacent protuberances so that, when viewed from the side, the protuberances and the web can take the form of a wave. Various configurations are possible.

[35] Referring to Figures 9 and 10, another example of a lid is shown generally at reference numeral 200. In the example illustrated, the lid 200 includes a panel 202 and a channel 204. The channel 204 is open from the bottom side of the lid 200, and extends about the panel 202 along a perimeter of the lid 200. The lid 200 includes a plurality of protuberances 206. In the example illustrated, the protuberances 206 are disposed within the channel 204 and are spaced apart along the perimeter of the lid 200. In the example illustrated, the lid 200 and the channel 204 are each generally circular in shape; however, other shapes are possible.

[36] Referring to Figures 11 and 12, the channel 204 includes a channel base 212 and a first channel sidewall 214. As shown, the protuberances 206 are Date Recue/Date Received 2021-04-16 arranged on an inner surface of the channel base 212 and extend downwardly therefrom. In the example illustrated, the first channel sidewall 214 extends downwardly from an outer end of the channel base 212. In the example illustrated, a hook or sealing shoulder 222 projects inwardly from the first channel sidewall 214.

[37] Referring to Figure 13, an example of a container is shown generally at reference numeral 224. In the example illustrated, the container 224 has a sidewall that is generally cylindrical in shape; however, other shapes are possible. In a closed position, the lid 200 and the container 224 together form a pail 236. In the example illustrated, the container 224 has a base that is received by the top side of the lid 200. Thus, a plurality of the pails 236 can be stored in a stacked arrangement.

[38] Referring to Figure 14, the protuberances 206 abut an upper rim 230 and a sealing rib 234 engages the first channel sidewall 214 and the sealing shoulder 222. As illustrated, there can be interference fit between various components.
As illustrated, this arrangement can result in an effective seal between the lid and the container 224 when in the closed position. In some examples, the seal between the lid 200 and the container 224 can be fluid tight.

[39] In the specific example illustrated, the lid 200 has a bottom edge diameter 254 (see Figure 10) of about 12.388 inches and there are 180 of the protuberances 206 spaced about the perimeter of the lid 200. In the specific example illustrated, each of the protuberances 206 has a diameter 256 (see Figure 12) of about 0.051 inches and a height 258 (see Figure 12, measured from the inner surface of the channel base 212) of about 0.07 inches.

[40] Again, the present disclosure relates to lids for closing an open end of a container, without the use of a gasket. However, in alternative examples, the lids disclosed herein may include a flow-in gasket to improve the seal between it and Date Recue/Date Received 2021-04-16 the container. In such examples, the protuberances can help receive the gasket material and maintain its position during manufacture and use.

[41] While the above description provides examples of one or more apparatuses and/or methods, it will be appreciated that other apparatuses and/or methods may be within the scope of the accompanying claims.

Date Recue/Date Received 2021-04-16

Claims (30)

- 13 -We claim:

1. A pail, comprising:
a container comprising a base, a container sidewall extending upwardly from the base to an upper rim, and a sealing rib extending from the container sidewall adjacent to the upper rim; and a lid comprising a channel for receiving the upper rim of the container, the channel comprising a channel base, a plurality of protuberances arranged spaced apart on an inner surface of the channel base and extending downwardly therefrom, a first channel sidewall, and a sealing shoulder that projects inwardly from the first channel sidewall, wherein, when the upper rim of the container is received by the channel of the lid, the protuberances abut the upper rim and the sealing rib engages the first channel sidewall and the sealing shoulder.

2. The pail of claim 1, wherein the protuberances urge the sealing rib downwardly against the sealing shoulder, to thereby form a seal.

3. The pail of claim 2, wherein the channel base comprises an inner end and an outer end, and the first channel sidewall extends downwardly from the outer end of the channel base.

4. The pail of claim 3, wherein the sealing rib extends outwardly from the container sidewall.

5. The pail of claim 4, wherein the sealing rib comprises an upper rib surface, a lower rib surface, and a distal rib surface that extends between upper and lower rib surfaces.

Date Recue/Date Received 2021-04-16

6. The pail of claim 5, wherein, when the upper rim of the container is received by the channel of the lid, the lower rib surface abuts the sealing shoulder and the distal rib surface abuts the first channel sidewall, to thereby form the seal.

7. The pail of claim 6, wherein the upper rib surface defines a topmost surface of the upper rim.

8. The pail of claim 6 or 7, wherein the protuberances bear against upper rib surface, which thereby urges the lower rib surface downwardly against the sealing shoulder.

9. The pail of claim 8, wherein the channel comprises a second channel sidewall, and the second channel sidewall extends downwardly from the inner end the channel base.

10. The pail of claim 9, wherein the second channel sidewall urges the distal rib surface outwardly against the first channel sidewall.

11. The pail of claim 10, wherein a channel width is smaller than a rib dimension so that there is an interference fit therebetween.

12. The pail of claim 10 or 11, wherein the second channel sidewall includes at least one wiper element that projects outwardly to cause the distal rib surface to bear outwardly against the first channel sidewall.

13. The pail of any one of claims 1 to 12, wherein the protuberances are spaced apart regularly within the channel so that a pitch distance between adjacent protuberances is generally uniform about a perimeter of the lid.

14. The pail of any one of claims 1 to 13, wherein the lid has between 50 to 250 of the protuberances disposed within the channel.

Date Recue/Date Received 2021-04-16

15. The pail of any one of claims 1 to 14, wherein the lid has between 150 to 180 of the protuberances disposed within the channel.

16. The pail of any one of claims 1 to 15, wherein each of the protuberances has a height of between about 0.05 inches to 0.07 inches from the inner surface of the channel base.

17. The pail of any one of claims 1 to 16, wherein each of the protuberances is generally circular in cross section and has a diameter of between about 0.04 inches to 0.051 inches.

18. The pail of any one of claims 1 to 17, wherein each of the protuberances is generally cylindrical in shape and has a generally hemispherical outer end.

19. The pail of any one of claims 1 to 18, wherein the lid does not comprise a gasket.

20. A lid for sealing an open end of a container, the container comprising an upper rim and a sealing rib, the lid comprising:
a channel comprising a channel base, a plurality of protuberances arranged spaced apart on an inner surface of the channel base and extending downwardly therefrom, a first channel sidewall, and a sealing shoulder that projects inwardly from the first channel sidewall, wherein, when the upper rim of the container is received by the channel of the lid, the protuberances abut the upper rim and the sealing rib engages the first channel sidewall and the sealing shoulder.

21. The lid of claim 20, wherein the channel base comprises an inner end and an outer end, and the first channel sidewall extends downwardly from the outer end of the channel base.

Date Recue/Date Received 2021-04-16

22. The lid of claim 21, wherein the channel comprises a second channel sidewall, and the second channel sidewall extends downwardly from the inner end the channel base.

23. The lid of claim 22, wherein the second channel sidewall includes at least one wiper element that projects outwardly.

24. The lid of any one of claims 20 to 23, wherein the protuberances are spaced apart regularly within the channel so that a pitch distance between adjacent protuberances is generally uniform about a perimeter of the lid.

25. The lid of any one of claims 20 to 24, wherein the lid has between 50 to 250 of the protuberances disposed within the channel.

26. The lid of any one of claims 20 to 25, wherein the lid has between 150 to 180 of the protuberances disposed within the channel.

27. The lid of any one of claims 20 to 26, wherein each of the protuberances has a height of between about 0.05 inches to 0.07 inches from the inner surface of the channel base.

28. The lid of any one of claims 20 to 27, wherein each of the protuberances is generally circular in cross section and has a diameter of between about 0.04 inches to 0.051 inches.

29. The lid of any one of claims 20 to 28, wherein each of the protuberances is generally cylindrical in shape and has a generally hemispherical outer end.

30. The lid of any one of claims 20 to 29, wherein the lid does not comprise a gasket.

Date Recue/Date Received 2021-04-16