U.S. patent application number 11/480635 was filed with the patent office on 2007-08-09 for internally fitted cellulose draft matching lid.
This patent application is currently assigned to Seanet Group, Inc.. Invention is credited to David Pierce, Edward Urquhart.
Application Number | 20070181591 11/480635 |
Document ID | / |
Family ID | 38332972 |
Filed Date | 2007-08-09 |
United States Patent
Application |
20070181591 |
Kind Code |
A1 |
Pierce; David ; et
al. |
August 9, 2007 |
Internally fitted cellulose draft matching lid
Abstract
A biodegradable and recyclable paper internally fitted lid or
closure which improves on current lids or closures. Embodiments of
this invention provide an arrangement easier for the consumer to
use as it is self "seating" and requires very little if any
pressure to affix as gravity does most of the work. The internally
fitted lid of one embodiment seals a larger area of the beverage
container opening by relying on the matching the draft angle of
wall of the internally fitted lid with the draft angle of the
beverage container.
Inventors: |
Pierce; David; (Renton,
WA) ; Urquhart; Edward; (Bellevue, WA) |
Correspondence
Address: |
PERKINS COIE LLP;PATENT-SEA
P.O. BOX 1247
SEATTLE
WA
98111-1247
US
|
Assignee: |
Seanet Group, Inc.
Bellevue
WA
98004
|
Family ID: |
38332972 |
Appl. No.: |
11/480635 |
Filed: |
June 30, 2006 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60696139 |
Jul 1, 2005 |
|
|
|
Current U.S.
Class: |
220/801 ;
220/719 |
Current CPC
Class: |
B65D 2543/005 20130101;
B65D 43/022 20130101; Y02W 90/10 20150501; B65D 65/466 20130101;
Y02W 90/13 20150501; B65D 2543/00268 20130101; B65D 2543/00092
20130101 |
Class at
Publication: |
220/801 ;
220/719 |
International
Class: |
B65D 43/04 20060101
B65D043/04; A47G 19/22 20060101 A47G019/22 |
Claims
1. A beverage container and an internally fitted lid assembly,
comprising: a beverage container having a closed end and first
sidewalls that defines an interior area, the sidewalls have an
upper portion that has a first draft angle and that defines an
opening to the interior area, the upper portion has in interior
surface in communication with the interior area; an internally
fitted lid having a top portions and second sidewalls having a
second draft angle that substantially matches the first draft angle
and being configured to fit into the opening and sealably engage
the interior surface of the upper portion of the first
sidewalls.
2. The beverage container of claim 1 wherein the beverage container
and the internally fitted lid are constructed of one or more
recyclable materials.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This non-provisional patent application claims priority to
U.S. Provisional Patent Application No. 60/696,139 entitled
INTERNALLY FITTED CELLULOSE DRAFT MATCHING LID, filed Jul. 1, 2005,
and which is incorporated herein in its entirety by reference
thereto.
DESCRIPTION OF PRIOR ART
[0002] Take out disposable beverage containers have a manifest need
for lids or closures which prevent the liquid in the container from
spilling out of the opening used for filling and or drinking during
the movement inherent in transportation. These lids or closures
also provide varying degrees of insulation from temperature
change.
[0003] The current traditional methods to achieve this spill
protection and insulation have been plastic thermoformed lids which
snap over the top and exterior of the beverage container, taking
advantage pliability and memory of the plastic lid and the paper
cup to achieve a snap lock through out the circumference of the lip
of the beverage container opening.
[0004] Another variation of this is to create an debossment in the
internal wall of the container below the lip of the container which
runs the circumference or is in place at parts of the circumference
which when the lid or closure is fitted internally to the container
have a matching embossment which snap seals using a similar
principle to the external snap lip mentioned above.
[0005] Other means to secure a lid or closure to the beverage
container will include flexible gaskets and threaded screw closure
mechanisms.
SUMMARY AND BACKGROUND
[0006] This invention provides a biodegradable and recyclable paper
internally fitted lid or closure which improves on current lids or
closures through the application on several techniques and
principles.
[0007] Embodiments of this invention provide an arrangement that is
easier for the consumer to use as it is self "seating" and requires
very little if any pressure to affix as gravity does most of the
work.(FIGS. 1, 3, 14, 15 & 16)
[0008] The internally fitted lid described seals a larger area of
the beverage container opening by relying on the matching the draft
angle of wall of the internally fitted lid with the draft angle of
the beverage container. (FIGS. 4, 5, 6A & 6B)
[0009] This arrangement accomplishes a number of beneficial and
desirable results.
[0010] This larger paper to paper surface area (a band 1/4'' to 1''
wide around the upper circumference of the beverage container) will
through close association with the contained liquid and or ambient
moisture through steam or wicking result in surface tension and
thereby create a seal as a result of the pressure differential
between the outside of the container the moisture trapped in the
band of the seal area.(Fig 6B)
[0011] When the base of the lid is placed into the beverage
container it at times may come into contact with the liquid inside
and displacement of the liquid will occur. The displacement will
serve to moisten the material of the lid (which beneficial effect
will be described in the following paragraph) and the area and
shape of the lids "roof" or horizontal top will allow the liquid o
displace internally as well as allowing the vertical wall of the
lid to, in effect, "squeegee" the liquid down into the container
and not upward out of and over the sides of the container.
[0012] This is further enhanced by the natural wicking and moisture
absorption of paper or cellulose which results in expansion or
swelling of the paper of both container and internally fitted lid
(internally and externally) thereby tightening the seal and
increasing friction.
[0013] Another way of stating this is: Any moisture which wicks
into the seal serves to enhance the seal through the properties of
surface tension, pressure differential induced suction and a global
expansion of the paper fibers from the slight saturation resulting
from ambient atmospheric moisture from such close proximity to heat
and water from hot beverage or condensation resulting from close
proximity to a cold beverage.
[0014] This can be accomplished as a result of an additional
feature of the embodiments; the use of a biodegradable and
re-pulpable (in common paper recycling systems) coated paper which
is very resistant on its surface to moisture while allowing the
internal fibers to absorb small amounts of atmospheric ambient
moisture. This uses the same principal used historically in canteen
and liquid containers whose leather gaskets and or seal need to be
moistened to achieve a consistent seal and whose seal was
maintained through the wicking action of the leather over time.
[0015] In addition to the robust closure provided by the above
characteristics; the internally fitted lid can also be further
augmented by the inclusion of a flexible and malleable gasket which
can be added on to the exterior circumference of the internally
fitted lid at any point between the rolled lip and the bottom of
the lid. The manner of producing this gasket and adhering it to the
exterior surface of the lid is through printing of the gasket on
the lid's outer surface while the paper is flat, before it has been
formed into the lid configuration. (This would be very similar to
the process whereby cup walls are printed before being formed into
frusto-conical shape).
[0016] This gasket would by it malleable nature serves as a further
moisture barrier and would augment the "seating" of the lid inside
the beverage container (FIGS. 7 & 8).
[0017] Another benefit of the internally fitted lid which seals and
"seats" in the above described manners is the safety improvement
gained as the internally fitted lid with a sealing area as great as
the wide circumferential band described in this invention greatly
increases the radial strength of the container and prevents
container compression and lid popover associated with snap on
plastic exterior lids when the consumer picks up the container and
applies natural pressure to the side walls and inadvertently
collapses the container.
[0018] This internally fitted lid augments the strength of the
container when subjected to heat and moisture. This is a problem in
existing beverage containers. The internally fitted lid is not
subject to lid pop off as compression only serves to make the seal
tighter and more firmly "seats" the lid.
[0019] Another benefit of the internally fitted lid in accordance
with one or more embodiments includes the chosen cellulose material
that allows the exterior surface as well to be printed prior to
formation as a lid, when the lid it is in flat form on standard
high speed machinery with information and/or advertising. This is
difficult in the existing plastic lids.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] FIG. 1. Demonstration of the internally fitted lid and
beverage container together with various preferred lid shapes and
treatments
[0021] FIG. 2. Sketches and wire frame of internally fitted lid
demonstrating different upper or outside configurations or
treatments, Reliefs, angled lids, domes, etc
[0022] FIG. 3. Another demonstration of the internally fitted lid
and beverage container together
[0023] FIG. 4. Isometric and cut away side view of internally
fitted lid and container with lid unseated in cup
[0024] FIG. 5. Isometric and cut away side view of internally
fitted lid and container with lid partially seated in cup
[0025] FIG. 6A. Isometric and cut away side view of internally
fitted lid and container with lid fully seated in cup
[0026] FIG. 6B. Magnified cut away side view of internally fitted
lid and container with lid seated in cup demonstrating the
resulting surface tension and pressure differential seal of
moisture in the seal.
[0027] FIG. 7. Demonstration of the possible placements of a
printed malleable gasket
[0028] FIG. 8. Magnified view of compression of gasket in use.
[0029] FIGS. 9 through 16. Further views and examples of lid and
beverage container interaction.
[0030] From the foregoing, it will be appreciated that specific
embodiments of the invention have been described herein for
purposes of illustration, but that various modifications may be
made without deviating from the spirit and scope of the invention.
Accordingly, the invention is not limited except as by the appended
claims.
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