CA1324342C - Disposable cup lid with tear tab and gripping means for the tear tab - Google Patents
Disposable cup lid with tear tab and gripping means for the tear tabInfo
- Publication number
- CA1324342C CA1324342C CA000589179A CA589179A CA1324342C CA 1324342 C CA1324342 C CA 1324342C CA 000589179 A CA000589179 A CA 000589179A CA 589179 A CA589179 A CA 589179A CA 1324342 C CA1324342 C CA 1324342C
- Authority
- CA
- Canada
- Prior art keywords
- lid
- lip
- groove
- tear
- tab
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D47/00—Closures with filling and discharging, or with discharging, devices
- B65D47/04—Closures with discharging devices other than pumps
- B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
- B65D47/10—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having frangible closures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D43/00—Lids or covers for rigid or semi-rigid containers
- B65D43/14—Non-removable lids or covers
- B65D43/24—Devices for retaining in open position
Abstract
ABSTRACT
The invention concerns lids for disposable drinking cups. A circular cup lid having a peripheral lip to engage a rim of a drinking cup has a minor section forming a tear back strip. That portion of the lip in the tear back sector which is arcuate in form is engagable in a generally straight groove in the lid to hold the tear back strip in open position. The engagement of an arcuate lip portion in a straight groove may provide extra gripping force in the groove. The tear tab need not have perforated or other physically formed tear lines but may be defined only by orientation lines in the plastic material of the lid.
The invention concerns lids for disposable drinking cups. A circular cup lid having a peripheral lip to engage a rim of a drinking cup has a minor section forming a tear back strip. That portion of the lip in the tear back sector which is arcuate in form is engagable in a generally straight groove in the lid to hold the tear back strip in open position. The engagement of an arcuate lip portion in a straight groove may provide extra gripping force in the groove. The tear tab need not have perforated or other physically formed tear lines but may be defined only by orientation lines in the plastic material of the lid.
Description
132~3 ~2 This invention relates to disposable lids for disposable drinking vessels, which lids may be secured to the rim of a corresponding drinking vessel to prevent spills and/or to retain heat.
Disposable cup lids are usually made of plastics material and are produced in very large numbers from a die to form a lip on the lid which mates with a rim of the cup or glass with which it is to be used. Advantageously, such covers have openable and reclosable tabs to permit access to the cup or glass for drinking from it. A desirable cup lid is one of which the tab may be opened, retained open so that it does not interfere with the use of the cup for drinking purposes, does not have to be disposed of separately, and may also be reclosable.
Various attempts have been made in the past to produce such lids. For example, U.S. Patent Nos. 3,977,559 (LOMBARDI), August 31st 1976, and 4,473,167 ~BAILEY) September 25th 1984, disclose stamped out tabs in drinking cup lids, which tabs hinge with respect to the lid to open and close. No means is shown for securing the tabs in the open position and they are apparantly free to flap against the user's face in use. U.S. Patent No.
4,502,608 (MILLS) March 5th 1985, discloses a somewhat similar tab but this tab is not hinged but wholly removable. Thus the container is not reclosable but the nuisance of a flapping tab is not present. U.S. Patent No. 3,994,411 ((ELFELT et al) November 30th 1976, discloses a hingable tab which may be retained in the open position by slotting a portion of the tab into a slit through the lid. U.S. patent No7 4,629, 088 (DURGIN) December 16th 1986, discloses a tear strip which may be hinged back to latch into a shallow tab shaped nest. Overhanging detents are provided at the edges of the socket to hold the tab.
U.S. Patent No. 4,460,103 (RAMA et al) July 17th 1984, discloses a hingable tab which does not extend to the edge of the lid but 1324~
comprises a hingable panel in the plane of the lid. The panel is provided with a peg which fits into a socket in the lid to hold the panel in open position by friction. U.S. Patent No.
4,202,459 (DEPARA~ES) May 13th 1980, and-U.S. Des. Patent No.
259,403 (FRAZIER) June 2nd 1981, disclose a lid having a hingable tab. That part of the lip of the lip which lifts with the tab lodges in a similarly shaped groove to hold the tab open.
All the tabs mentioned are formed by cuts into the plastics material of the lid either as full lines or broken lines.
It is desirable that there should, at least initially before any tear strip is first opened, be an integral lip around the lid for mating with a corresponding rim of the cup or glass.
Such an integral lip when mated with the rim of the cup may exert some tension in the resulting band around the rim thereby resulting in good sealing with the rim. Cuts through this band to define a tear strip may at least weaken the band and, hence, are undesirable. Some of the previous lids are provided with radial strengthening ribs to mitigate this.
Moreover, a curved section of lid lodged in a similarly curved socket therefor, may be lodged mainly by friction. It may be desirable to improve such lodgement.
However, it is important that details of the die should be as simple as possible and that extra steps of manufacture, such as stamping cuts defining tear strips should be minimised or even eliminated.
According to the present invention there is provided a disposable substantially circular lid for a drinking vessel comprising;
~ 32~3~
a generally planar cover formed from resiliently deformable, oriented, plastics sheet material and having a peripheral lip comprising in a lower surface of the cover to engage a corresponding rim of the vessel;
a tear strip in the lid comprising a minor portion of the lip and a corresponding section of the cover, the strip being adapted to tear inwardly from the periphery of the lid in the direction of orientation of the plastics sheet material;
a manually grippable tab of the strip extending outwardly of the lid having side edges joining the lid at an angle thereto and defining, in the apex of each angle, starting points for tearing; and a groove located on a chord of the circular lid and diametrically opposite said minor portion of the lip and adapted to receive said minor portion of lip, the minor portion of the lip being manually resiliently deformable and the groove being shaped such that some deformation of the lip portion is necessary for it to fit into the groove whereby the lip portion is biased against the sides of the groove in gripping relation.
The starting points for tearing may be defined only by the apex of each angle, but there~is no objection to providing a cut or "nick" in the relevant apex to facilitate tearing even more.
Preferably the minor portion of the lip is manually resiliently deformable and the groove is shaped such that some deformation of the lip portion is necessary for it to fit into the groove. The resulting bias of the lip portion against the sides of the groove may increase the holding force between them.
Suitably the groove is substantially straight. However, if a straight groove is made during forming, the resulting groove tends to be slightly off-straight due to deformation in cooling.
It is preferred that any such deformation is calculated to counter the curve of the minor portion of lip.
~32~3~2 Preferably a stop is provided to reduce the possibility of the tear strip being torn too far back and possibly being entirely torn away from the lid in error.
Conveniently, such a stop may be a chordal groove extending across the tear strip perpendicular to a radius of the lid bisecting the tab. Such a groove may also act as a hinge for the tear strip.
The groove to receive the minor portion of lip is suitably of similar length and width to that portion of lip. The portion of lip, since it formed part of the periphery of the circular lid, is arcuate and thus requires some deformation to squeeze it into a straight groove or another shape of groove other than its exact complement. Once located in the groove, the lip is biased to return to its arcuate form and its ends may bear against a wall of the groove, thus providing more than the frictional grip of exactly similarly shaped parts.
Channels or strengthening ribs may be provided on either surface of the cover.
A lid according to the invention may be formed from extruded oriented plastics material sheet. If the plastics material is orientable, the direction of orientation is in the direction of extrusion and is imposed on the sheet during extrusion. In this case, the tear strip itself may be integral with the cover with no provision being made for marking the tear lines with perforations or full or broken cuts if the direction of desired tearing is aligned with the direction of orientation of the extruded plastic sheet.
An embodiment of the invention will now be described by way of example with reference to the drawings, in which Figure 1 is a perspective view of an embodiment of the invention;
13243~2 Figure 2 is a plan view of the lid shown in Figure l;
Figure 3 is a section on the line III-III of Figure 2 but with the tear strip lifted;
Figure 4 is a sketch similar to that of Figure 3 but showing a section of a slightly different lid;
Figure 5 is a diagrammatic sketch showing latching mechanism in the unlatched position; and Figure 6 is a similar diagrammatic sketch to that of Figure 4 but showing the latching mechanism in the latched position.
Referring to the drawings, a lid 11 covers a cup 10 which has a rim 15. The rim 15 mates with peripheral lip 13 of the lid 11.
The cup 10 may be of any convenient material, for example, of polystyrene foam for hot drinks and of waxed paper with a rolled rim 15 for cold drinks or of molded plastics material.
The lid 11 may be formed from resiliently deformable plastics sheet material, conveniently extruded plastics sheet material having an orientation in the direction of extrusion.
Such orientation tends to happen naturally and, in most cases, is more difficult to avoid than to provide.
Provision of a tear strip 40 without the necessity of perforations or full or broken cuts to define its edges, makes use of the almost inevitable property of orientation possessed by the sheet from which the lid 11 is formed. A manually grippable tab 42 extends outwardly of the periphery of the lid 132~ 2 11 from the edge of the lip 13. Preferably, the tab 42 connects with the lip through angles each having a sharp apex 44.
Convenien~ly each angle may be about 90 .
When tab 42 is gripped and pulled upwardly and backwardly in the general direction of arrow 14, the stresses at the apices 44 of the angles at which the tab 42 joins the lip may be sufficient to initiate tearing. However, if desired, cuts or nicks may be provided at these apices to help facilitate tearing. Thereafter, the line of tearing generally follows the direction of orientation of the plastics material with the result that the tear strip 40 is formed as a segment of the lid without any especial provision of tear lines. If non-oriented plastics material is used, such tear lines should be provided.
It is an preferable feature of the present invention to provide a lid having a lip 13 mating with a rim 15 of the drinking vessel without perforated or cut lines for defining and lifting an access strip to the vessel. Perforated or cut lines in the lip area represent areas of weakness and may detract from the band strength and resulting sealing of the lip with the rim.
A short chordal groove 22 is provided across the tear strip vertically to the direction of tear. This groove 22 may be formed in the forming operation. It acts as both a hinge for bending back tear strip 40 and as at least a partial stop to reduce any tendency of the tear strip to tear too far. When tearing reaches groove 22, the operator is at least aware of an irregularity in the smoothness of tearing and should exert no further tearing force.
The tear strip 40 may be bent back about the groove 22 so that a minor arcuate portion 46 of lip 13 moves towards the upper surface of the lid 11 in the direction of arrow 14 in Figure 1. A latching groove 19 is located to receive the arcuate 132~3~
portion 46 of lip 13. Groove l9 has a length sufficient to receive portion 46 and its shape is such that the arcuate portion 46 must be deformed slightly in order to fit into it, and possibly the groove 19 itself deforms slightly fitted when the available portion 46 is fitted into it. As shown groove l9 is substantially straight and its width is such as to receive the slightly deformed portion 46.
Groove 19 is normally formed to be straight but deformation during cooling usually results in lack of straightness. It may be an advantage if such lack of straightness slightly counters the curve of arcuate portion 46.
This is best seen in Figure 5.
Once portion 46 is located in groove l9 it is biased to return to its undeformed state and thus the groove l9 confines it firmly in its lodged position. Figure 5 shows a diagrammatic sketch of the undeformed portion 46 superimposed upon the groove 19 with a counter curve to arcuate portion 46 which is shown in broken lines. Figure 6 shows a similar view but with the portion 46 lodged in groove 19. Arrows 48 show the direction of forces between the portion 46 and the groove l9 which result in rim securement of the portion 46 in groove 19.
When it is desired to close the tab it may be manually disengaged from groove 19 and moved in the direction of the arrow 31 shown in Figure 3 to re-engage the rim 15.
Conventional reinforcing ribs, for example, ribs 2 may be provided.
Although the invention has been described with reference to specific embodiments, it will be appreciated that modifications and changes may be made without departing from the spirit and scope of the claims.
Disposable cup lids are usually made of plastics material and are produced in very large numbers from a die to form a lip on the lid which mates with a rim of the cup or glass with which it is to be used. Advantageously, such covers have openable and reclosable tabs to permit access to the cup or glass for drinking from it. A desirable cup lid is one of which the tab may be opened, retained open so that it does not interfere with the use of the cup for drinking purposes, does not have to be disposed of separately, and may also be reclosable.
Various attempts have been made in the past to produce such lids. For example, U.S. Patent Nos. 3,977,559 (LOMBARDI), August 31st 1976, and 4,473,167 ~BAILEY) September 25th 1984, disclose stamped out tabs in drinking cup lids, which tabs hinge with respect to the lid to open and close. No means is shown for securing the tabs in the open position and they are apparantly free to flap against the user's face in use. U.S. Patent No.
4,502,608 (MILLS) March 5th 1985, discloses a somewhat similar tab but this tab is not hinged but wholly removable. Thus the container is not reclosable but the nuisance of a flapping tab is not present. U.S. Patent No. 3,994,411 ((ELFELT et al) November 30th 1976, discloses a hingable tab which may be retained in the open position by slotting a portion of the tab into a slit through the lid. U.S. patent No7 4,629, 088 (DURGIN) December 16th 1986, discloses a tear strip which may be hinged back to latch into a shallow tab shaped nest. Overhanging detents are provided at the edges of the socket to hold the tab.
U.S. Patent No. 4,460,103 (RAMA et al) July 17th 1984, discloses a hingable tab which does not extend to the edge of the lid but 1324~
comprises a hingable panel in the plane of the lid. The panel is provided with a peg which fits into a socket in the lid to hold the panel in open position by friction. U.S. Patent No.
4,202,459 (DEPARA~ES) May 13th 1980, and-U.S. Des. Patent No.
259,403 (FRAZIER) June 2nd 1981, disclose a lid having a hingable tab. That part of the lip of the lip which lifts with the tab lodges in a similarly shaped groove to hold the tab open.
All the tabs mentioned are formed by cuts into the plastics material of the lid either as full lines or broken lines.
It is desirable that there should, at least initially before any tear strip is first opened, be an integral lip around the lid for mating with a corresponding rim of the cup or glass.
Such an integral lip when mated with the rim of the cup may exert some tension in the resulting band around the rim thereby resulting in good sealing with the rim. Cuts through this band to define a tear strip may at least weaken the band and, hence, are undesirable. Some of the previous lids are provided with radial strengthening ribs to mitigate this.
Moreover, a curved section of lid lodged in a similarly curved socket therefor, may be lodged mainly by friction. It may be desirable to improve such lodgement.
However, it is important that details of the die should be as simple as possible and that extra steps of manufacture, such as stamping cuts defining tear strips should be minimised or even eliminated.
According to the present invention there is provided a disposable substantially circular lid for a drinking vessel comprising;
~ 32~3~
a generally planar cover formed from resiliently deformable, oriented, plastics sheet material and having a peripheral lip comprising in a lower surface of the cover to engage a corresponding rim of the vessel;
a tear strip in the lid comprising a minor portion of the lip and a corresponding section of the cover, the strip being adapted to tear inwardly from the periphery of the lid in the direction of orientation of the plastics sheet material;
a manually grippable tab of the strip extending outwardly of the lid having side edges joining the lid at an angle thereto and defining, in the apex of each angle, starting points for tearing; and a groove located on a chord of the circular lid and diametrically opposite said minor portion of the lip and adapted to receive said minor portion of lip, the minor portion of the lip being manually resiliently deformable and the groove being shaped such that some deformation of the lip portion is necessary for it to fit into the groove whereby the lip portion is biased against the sides of the groove in gripping relation.
The starting points for tearing may be defined only by the apex of each angle, but there~is no objection to providing a cut or "nick" in the relevant apex to facilitate tearing even more.
Preferably the minor portion of the lip is manually resiliently deformable and the groove is shaped such that some deformation of the lip portion is necessary for it to fit into the groove. The resulting bias of the lip portion against the sides of the groove may increase the holding force between them.
Suitably the groove is substantially straight. However, if a straight groove is made during forming, the resulting groove tends to be slightly off-straight due to deformation in cooling.
It is preferred that any such deformation is calculated to counter the curve of the minor portion of lip.
~32~3~2 Preferably a stop is provided to reduce the possibility of the tear strip being torn too far back and possibly being entirely torn away from the lid in error.
Conveniently, such a stop may be a chordal groove extending across the tear strip perpendicular to a radius of the lid bisecting the tab. Such a groove may also act as a hinge for the tear strip.
The groove to receive the minor portion of lip is suitably of similar length and width to that portion of lip. The portion of lip, since it formed part of the periphery of the circular lid, is arcuate and thus requires some deformation to squeeze it into a straight groove or another shape of groove other than its exact complement. Once located in the groove, the lip is biased to return to its arcuate form and its ends may bear against a wall of the groove, thus providing more than the frictional grip of exactly similarly shaped parts.
Channels or strengthening ribs may be provided on either surface of the cover.
A lid according to the invention may be formed from extruded oriented plastics material sheet. If the plastics material is orientable, the direction of orientation is in the direction of extrusion and is imposed on the sheet during extrusion. In this case, the tear strip itself may be integral with the cover with no provision being made for marking the tear lines with perforations or full or broken cuts if the direction of desired tearing is aligned with the direction of orientation of the extruded plastic sheet.
An embodiment of the invention will now be described by way of example with reference to the drawings, in which Figure 1 is a perspective view of an embodiment of the invention;
13243~2 Figure 2 is a plan view of the lid shown in Figure l;
Figure 3 is a section on the line III-III of Figure 2 but with the tear strip lifted;
Figure 4 is a sketch similar to that of Figure 3 but showing a section of a slightly different lid;
Figure 5 is a diagrammatic sketch showing latching mechanism in the unlatched position; and Figure 6 is a similar diagrammatic sketch to that of Figure 4 but showing the latching mechanism in the latched position.
Referring to the drawings, a lid 11 covers a cup 10 which has a rim 15. The rim 15 mates with peripheral lip 13 of the lid 11.
The cup 10 may be of any convenient material, for example, of polystyrene foam for hot drinks and of waxed paper with a rolled rim 15 for cold drinks or of molded plastics material.
The lid 11 may be formed from resiliently deformable plastics sheet material, conveniently extruded plastics sheet material having an orientation in the direction of extrusion.
Such orientation tends to happen naturally and, in most cases, is more difficult to avoid than to provide.
Provision of a tear strip 40 without the necessity of perforations or full or broken cuts to define its edges, makes use of the almost inevitable property of orientation possessed by the sheet from which the lid 11 is formed. A manually grippable tab 42 extends outwardly of the periphery of the lid 132~ 2 11 from the edge of the lip 13. Preferably, the tab 42 connects with the lip through angles each having a sharp apex 44.
Convenien~ly each angle may be about 90 .
When tab 42 is gripped and pulled upwardly and backwardly in the general direction of arrow 14, the stresses at the apices 44 of the angles at which the tab 42 joins the lip may be sufficient to initiate tearing. However, if desired, cuts or nicks may be provided at these apices to help facilitate tearing. Thereafter, the line of tearing generally follows the direction of orientation of the plastics material with the result that the tear strip 40 is formed as a segment of the lid without any especial provision of tear lines. If non-oriented plastics material is used, such tear lines should be provided.
It is an preferable feature of the present invention to provide a lid having a lip 13 mating with a rim 15 of the drinking vessel without perforated or cut lines for defining and lifting an access strip to the vessel. Perforated or cut lines in the lip area represent areas of weakness and may detract from the band strength and resulting sealing of the lip with the rim.
A short chordal groove 22 is provided across the tear strip vertically to the direction of tear. This groove 22 may be formed in the forming operation. It acts as both a hinge for bending back tear strip 40 and as at least a partial stop to reduce any tendency of the tear strip to tear too far. When tearing reaches groove 22, the operator is at least aware of an irregularity in the smoothness of tearing and should exert no further tearing force.
The tear strip 40 may be bent back about the groove 22 so that a minor arcuate portion 46 of lip 13 moves towards the upper surface of the lid 11 in the direction of arrow 14 in Figure 1. A latching groove 19 is located to receive the arcuate 132~3~
portion 46 of lip 13. Groove l9 has a length sufficient to receive portion 46 and its shape is such that the arcuate portion 46 must be deformed slightly in order to fit into it, and possibly the groove 19 itself deforms slightly fitted when the available portion 46 is fitted into it. As shown groove l9 is substantially straight and its width is such as to receive the slightly deformed portion 46.
Groove 19 is normally formed to be straight but deformation during cooling usually results in lack of straightness. It may be an advantage if such lack of straightness slightly counters the curve of arcuate portion 46.
This is best seen in Figure 5.
Once portion 46 is located in groove l9 it is biased to return to its undeformed state and thus the groove l9 confines it firmly in its lodged position. Figure 5 shows a diagrammatic sketch of the undeformed portion 46 superimposed upon the groove 19 with a counter curve to arcuate portion 46 which is shown in broken lines. Figure 6 shows a similar view but with the portion 46 lodged in groove 19. Arrows 48 show the direction of forces between the portion 46 and the groove l9 which result in rim securement of the portion 46 in groove 19.
When it is desired to close the tab it may be manually disengaged from groove 19 and moved in the direction of the arrow 31 shown in Figure 3 to re-engage the rim 15.
Conventional reinforcing ribs, for example, ribs 2 may be provided.
Although the invention has been described with reference to specific embodiments, it will be appreciated that modifications and changes may be made without departing from the spirit and scope of the claims.
Claims (7)
1. A disposable substantially circular lid for a drinking vessel comprising;
a substantially planar cover formed from resiliently deformable, oriented, plastics sheet material and having a peripheral lip to engage a corresponding rim of the vessel;
a tear strip in the lid comprising a minor portion of the lip and a corresponding part of the cover, the strip being adapted to tear inwardly from the periphery of the lid along tear lines;
a manually grippable tab of the tear strip extending outwardly of the lid having side edges joining the lid at an angle thereto and defining, in the apex of each angle, starting points for tearing;
a groove located on a chord of the circular lid and diametrically opposite said minor portion of the lip and adapated to receive said minor portion of the lip, the minor portion of the lip being manually resiliently deformable and the groove being shaped such that some deformation of the lip portion is necessary for it to fit into the groove whereby the lip portion is biased against the sides of the groove in gripping relation.
a substantially planar cover formed from resiliently deformable, oriented, plastics sheet material and having a peripheral lip to engage a corresponding rim of the vessel;
a tear strip in the lid comprising a minor portion of the lip and a corresponding part of the cover, the strip being adapted to tear inwardly from the periphery of the lid along tear lines;
a manually grippable tab of the tear strip extending outwardly of the lid having side edges joining the lid at an angle thereto and defining, in the apex of each angle, starting points for tearing;
a groove located on a chord of the circular lid and diametrically opposite said minor portion of the lip and adapated to receive said minor portion of the lip, the minor portion of the lip being manually resiliently deformable and the groove being shaped such that some deformation of the lip portion is necessary for it to fit into the groove whereby the lip portion is biased against the sides of the groove in gripping relation.
2. A lid as claimed in claim 1, in which the tear strips are defined only by the direction of the orientation of the plastics sheet material.
3. A lid as claimed in claim 1, in which the groove is substantially straight.
4. A lid as claimed in claim 1 in which a chordal groove extends across the tear strip perpendicular to a radius of the lid bisecting the tab.
5. A disposable substantially circular lid for a drinking vessel comprising:
a substantially planar cover formed from resiliently deformable, plastics sheet material and having a peripheral lip to engage a corresponding rim of the vessel;
a tear strip in the lid comprising a minor resiliently deformable portion of the lip and a corresponding part of the cover, the strip being adapted to tear nwardly from the periphery of the lid;
a manually grippable tab of the tear strip extending outwardly of the lid having side edges joining the lid at an angle thereto and defining, in the apex of each angle, starting points for tearing; and a groove located on a chord of the circular lid and diametrically opposite said minor portion of lip and adapted to receive said lip portion in a resiliently deformed condition and releasably grip said minor portion of lip.
a substantially planar cover formed from resiliently deformable, plastics sheet material and having a peripheral lip to engage a corresponding rim of the vessel;
a tear strip in the lid comprising a minor resiliently deformable portion of the lip and a corresponding part of the cover, the strip being adapted to tear nwardly from the periphery of the lid;
a manually grippable tab of the tear strip extending outwardly of the lid having side edges joining the lid at an angle thereto and defining, in the apex of each angle, starting points for tearing; and a groove located on a chord of the circular lid and diametrically opposite said minor portion of lip and adapted to receive said lip portion in a resiliently deformed condition and releasably grip said minor portion of lip.
6. A lid as claimed in claim 5, in which the groove is substantially straight.
7. A lid as claimed in claim 5 in wihich a chordal groove extends across the tear strip perpendicular to a radius of the lid bisecting the tab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000589179A CA1324342C (en) | 1989-01-25 | 1989-01-25 | Disposable cup lid with tear tab and gripping means for the tear tab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000589179A CA1324342C (en) | 1989-01-25 | 1989-01-25 | Disposable cup lid with tear tab and gripping means for the tear tab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1324342C true CA1324342C (en) | 1993-11-16 |
Family
ID=4139518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000589179A Expired - Lifetime CA1324342C (en) | 1989-01-25 | 1989-01-25 | Disposable cup lid with tear tab and gripping means for the tear tab |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1324342C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7845514B2 (en) | 2007-03-06 | 2010-12-07 | Dixie Consumer Products Llc | Filled polystyrene tear back container lids |
| US8881938B2 (en) | 2012-08-08 | 2014-11-11 | Harl-Bella Holdings, Llc | Lid for beverage container |
| USD736623S1 (en) | 2013-08-08 | 2015-08-18 | Harl-Bella Holdings, Llc | Lid with egg shaped basin |
| USD737142S1 (en) | 2013-08-08 | 2015-08-25 | Harl-Bella Holdings, Llc | Lid with triangular shaped basin |
| USD739729S1 (en) | 2013-08-08 | 2015-09-29 | Harl-Bella Holdings, Llc | Lid for beverage container |
| USD756773S1 (en) | 2013-08-08 | 2016-05-24 | Harl-Bella Holdings, Llc | Lid with tear line |
| US9751666B2 (en) | 2012-08-08 | 2017-09-05 | Harl-Bella Holdings, Llc | Lid for container |
| US10433664B2 (en) | 2012-08-08 | 2019-10-08 | Harl-Bella Holdings, Llc | Lid for container |
-
1989
- 1989-01-25 CA CA000589179A patent/CA1324342C/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7845514B2 (en) | 2007-03-06 | 2010-12-07 | Dixie Consumer Products Llc | Filled polystyrene tear back container lids |
| US10676253B2 (en) | 2012-08-08 | 2020-06-09 | Harl-Bella Holdings, Llc | Lid for beverage container |
| US9751666B2 (en) | 2012-08-08 | 2017-09-05 | Harl-Bella Holdings, Llc | Lid for container |
| US10351318B2 (en) | 2012-08-08 | 2019-07-16 | Harl-Bella Holdings, Llc | Lid for container |
| US10433664B2 (en) | 2012-08-08 | 2019-10-08 | Harl-Bella Holdings, Llc | Lid for container |
| US8881938B2 (en) | 2012-08-08 | 2014-11-11 | Harl-Bella Holdings, Llc | Lid for beverage container |
| US10815037B2 (en) | 2012-08-08 | 2020-10-27 | Harl-Bella Holdings, Llc | Lid for container |
| US11136172B2 (en) | 2012-08-08 | 2021-10-05 | Harl-Bella Holdings, Llc | Lid for container |
| US11297963B2 (en) | 2012-08-08 | 2022-04-12 | Harl-Bella Holdings, Llc | Lid for container |
| USD736623S1 (en) | 2013-08-08 | 2015-08-18 | Harl-Bella Holdings, Llc | Lid with egg shaped basin |
| USD737142S1 (en) | 2013-08-08 | 2015-08-25 | Harl-Bella Holdings, Llc | Lid with triangular shaped basin |
| USD739729S1 (en) | 2013-08-08 | 2015-09-29 | Harl-Bella Holdings, Llc | Lid for beverage container |
| USD756773S1 (en) | 2013-08-08 | 2016-05-24 | Harl-Bella Holdings, Llc | Lid with tear line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |
Effective date: 20101116 |