U.S. patent application number 13/447778 was filed with the patent office on 2012-08-09 for heat-insulating paper cup.
Invention is credited to Albert HSIEH.
Application Number | 20120199641 13/447778 |
Document ID | / |
Family ID | 46599986 |
Filed Date | 2012-08-09 |
United States Patent
Application |
20120199641 |
Kind Code |
A1 |
HSIEH; Albert |
August 9, 2012 |
HEAT-INSULATING PAPER CUP
Abstract
A heat-insulating paper cup allows the glued external wall of
the heat-insulating tube to be formed with a smooth surface, and
the raised lines on the inner wall of the heat-insulating tube are
mated closely with the conical cylindrical wall of the cup body.
This can facilitate advertisement printing and fabrication on the
surface of heat-insulating paper cup. Moreover, the raised lines on
the inner wall of the heat-insulating tube can support the ribs,
thus enhancing the structural strength and robustness of the
heat-insulating tube and avoiding squashing during manual
holding.
Inventors: |
HSIEH; Albert; (Lugang
Township, TW) |
Family ID: |
46599986 |
Appl. No.: |
13/447778 |
Filed: |
April 16, 2012 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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12691381 |
Jan 21, 2010 |
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13447778 |
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Current U.S.
Class: |
229/403 |
Current CPC
Class: |
B65D 81/3874 20130101;
B65D 81/3869 20130101; B65D 3/14 20130101 |
Class at
Publication: |
229/403 |
International
Class: |
B65D 3/00 20060101
B65D003/00 |
Claims
1. A heat-insulating paper cup, which comprising: a cup body, which
consists of a conical cylindrical wall, a cup bottom and a cup rim;
of which a downward protruding annular underframe is formed at the
joint of the cup bottom and the bottom of the conical cylindrical
wall; a glued heat-insulating tube made of paper material; the
inner wall of the heat-insulating tube is sleeved onto the exterior
of the conical cylindrical wall of the cup body, and the
heat-insulating tube and the conical cylindrical wall of the cup
body are adhered securely by glue W; the heat-insulating tube is of
conical cylindrical shape and mated with the conical cylindrical
wall; moreover, the external wall of the heat-insulating tube is
designed with a smooth surface; multiple raised lines, protruded at
interval onto the inner wall of the heat-insulating tube at an
oblique angle, and mated with the conical cylindrical wall of the
cup body; multiple hollow ducts, set into the heat-insulating tube
at interval and at an oblique angle in tune with the raised lines;
a second cup bottom, located at the bottom of annular underframe of
the cup bottom, so that an interval space is formed between second
cup bottom and cup bottom; and an annular side frame folded
downwards is set on the periphery of the second cup bottom, and
also located below the annular underframe of the cup bottom; a
bottom extension folded edge, extended downwards from the bottom of
the heat-insulating sleeve; said bottom extension folded edge is
also located beyond the annular underframe of the cup body and the
annular side frame of the second cup bottom; and the lower end of
bottom extension folded edge is folded inwards and upwards to form
a folded flange, which is abutted to the inner side of annular side
frame of the second cup bottom.
2. The device defined in claim 1, wherein the heat-insulating tube
is made of corrugated paper, so the corrugated inner layer of the
corrugated paper is defined to form said raised line and hollow
duct.
3. The device defined in claim 1, wherein the raised lines are
protruded at interval onto the inner wall of the heat-insulating
tube at an oblique angle, and said hollow ducts are also designed
with an oblique angle in tune with the raised lines.
4. The device defined in claim 3, wherein said raised line is
extended obliquely from the top to the bottom of the
heat-insulating tube.
5. The device defined in claim 3, wherein said raised line is
extended transversely into a wavy pattern between the top and
bottom of the heat-insulating tube.
6. The device defined in claim 1, wherein a curved retracted
segment is formed on the upper part of the annular side frame of
the second cup bottom, and also abutted to the inner side of
annular underframe of the cup body.
Description
CROSS-REFERENCE TO RELATED U.S. APPLICATIONS
[0001] The present application is a continuation-in-part of U.S.
application Ser. No. 12/691,381, filed on Jan. 21, 2010, and
entitled HEAT-INSULATING PAPER CUP", presently pending.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] Not applicable.
NAMES OF PARTIES TO A JOINT RESEARCH AGREEMENT
[0003] Not applicable.
REFERENCE TO AN APPENDIX SUBMITTED ON COMPACT DISC
[0004] Not applicable.
BACKGROUND OF THE INVENTION
[0005] 1. Field of the Invention
[0006] The present invention relates generally to a heat-insulating
paper cup, and more particularly to an innovative one which allows
raised lines to be set on the inner wall of the heat-insulating
tube and mated closely with the cup body.
[0007] 2. Description of Related Art Including Information
Disclosed Under 37 CFR 1.97 and 37 CFR 1.98
[0008] Since conventional a single-layer paper cup filled with hot
drink or water makes it difficult to hold manually, a
heat-insulating paper cup has been developed in the industry. Said
heat-insulating paper cup is structurally designed in such a manner
that an external paper tube is generally sleeved onto exterior of
original cup body, so a two-layer wall is employed for heat
insulation. Yet, there still exist the following shortcomings
against conventional heat-insulating paper cup.
[0009] As for the typical structure wherein the external paper tube
is made of corrugated paper and spaced ribs are set on the external
wall, the heat-insulating effect can be enhanced by the bigger
thickness of the external paper tube with spaced ribs, but the
irregular surface formed by the spaced ribs leads to difficult
advertisement printing and fabrication on the surface of the
heat-insulating paper cup.
[0010] Moreover, upper and lower flanges of the external paper tube
are designed into an incurved shape to form an annular space of
better insulation effect between the external paper tube and cup
body of conventional heat-insulating paper cup. Yet, it is observed
during actual application that, only incurved portions of the upper
and lower flanges of external paper tube are used as a support, a
vacant shell is formed between the intermediate region of the
external paper tube and the cup body, so the external paper tube is
easily squashed when it is held manually.
[0011] There still exists another shortcoming against conventional
heat-insulating paper cup: when these paper cups are overlapped,
the conical cylindrical wall of two heat-insulating paper cups
usually enters into a pressing state, abutting cannot be realized
due to spacing between the bottoms of the cups, so the overlapped
paper cups will enter into a tighter pressing state with the
overlapping time, leading to inconvenient use by the users. As for
heat-insulating paper cups with spaced ribs made of corrugated
paper, the spaced ribs on the external paper tube will be squashed
and deformed by excessive pressing, and the heat-insulating space
will be reduced, affecting the heat-insulating effect directly.
[0012] Moreover, notwithstanding the insulation effect of
conventional heat-insulating paper cup is achieved by said external
paper tube, the original single-layer paper wall for the bottom
structure is still maintained without any change of the design. So,
when a hot or warm drink is filled, the cup bottom is a relatively
weak part of the overall cup structure for heat insulation and
preservation, requiring for breakthrough improvement.
[0013] Thus, to overcome the aforementioned problems of the prior
art, it would be an advancement if the art to provide an improved
structure that can significantly improve the efficacy.
[0014] Therefore, the inventor has provided the present invention
of practicability after deliberate design and evaluation based on
years of experience in the production, development and design of
related products.
BRIEF SUMMARY OF THE INVENTION
[0015] The enhanced efficacy of the present invention is as
follows:
[0016] Based on the unique design of the present invention wherein
the "heat-insulating paper cup" allows the glued external wall of
heat-insulating tube to be designed with a smooth surface, and the
raised lines on the inner wall of the heat-insulating tube are
mated closely with the conical cylindrical wall of the cup body,
this can facilitate advertisement printing and fabrication on the
surface of heat-insulating paper cup. Moreover, the raised lines on
the inner wall of the heat-insulating tube can support the ribs,
thus enhancing the structural strength and robustness of the
heat-insulating tube and avoiding squashing during manual
holding.
[0017] The improvements brought about by this invention are as
follows:
[0018] Based on the structural design wherein the raised line is
designed into an oblique angle, the flow speed of glue can be
delayed to prevent dripping of the glue.
[0019] Based on the structural characteristics of the second cup
bottom and bottom extension folded edge, an extended strengthening
structure is formed at the bottom of the annular underframe of the
cup bottom. When cup bodies are overlapped, the bottom extension
folded edge on the cup body is abutted onto the cup bottom of the
cup body before the conical cylindrical walls of two cup bodies are
abutted to each other. In this case, the cup body will not continue
to fall, thus preventing excessive pressing of the conical
cylindrical walls of the cup bodies and facilitating the use of the
paper cups. Besides, raised lines on the inner wall of the
heat-insulating sleeve can also be prevented from deformation by
extruding to ensure the expected and best heat-insulating
effect.
[0020] With the setting of the second cup bottom, another bottom
structure could be formed at interval at the cup bottom of the cup
body, helping to make up the shortcomings of the original cup
bottom such as: single-layer structure and week heat preservation
effect, and significantly improve the bottom's structural strength
and heat-insulating effect of the heat-insulating paper cups.
[0021] Although the invention has been explained in relation to its
preferred embodiment, it is to be understood that many other
possible modifications and variations can be made without departing
from the spirit and scope of the invention as hereinafter
claimed.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0022] FIG. 1 shows an assembled perspective view of a preferred
embodiment of the present invention.
[0023] FIG. 2 shows an exploded perspective view of a preferred
embodiment of the present invention.
[0024] FIG. 3 shows an unfolded view of the heat-insulating tube of
the present invention.
[0025] FIG. 4 shows a plane top view of a preferred embodiment of
the present invention.
[0026] FIG. 5 shows a flow process diagram of the present
invention.
[0027] FIG. 6 shows a schematic view of the present invention that
the raised line is of a wavy pattern.
[0028] FIG. 7 shows an assembled sectional view of the preferred
embodiment of the present invention.
[0029] FIG. 8 shows an enlarged view of part B shown in FIG. 7.
[0030] FIG. 9 shows a plan view of two overlapped paper cup bodies
of the present invention.
[0031] FIG. 10 shows an application view of the present invention
wherein a curved retracted section is formed on the upper part of
the second cup bottom's annular side frame.
DETAILED DESCRIPTION OF THE INVENTION
[0032] FIGS. 1-4 and 7-8 depict preferred embodiments of a
heat-insulating paper cup of the present invention, which, however,
are provided for only explanatory objective for patent claims.
[0033] Said heat-insulating paper cup comprises a cup body 10,
which comprises a conical cylindrical wall 11, a cup bottom 12 and
a cup rim 13. Of which a downward protruding annular underframe 121
is formed at the joint of the cup bottom 12 and the bottom of the
conical cylindrical wall 11.
[0034] A glued heat-insulating tube 20 is made of paper material.
The inner wall 21 of the heat-insulating tube 20 is sleeved onto
the exterior of the conical cylindrical wall 11 of the cup body 10,
and the heat-insulating tube 20 and the conical cylindrical wall 11
of the cup body 10 are adhered securely by glue W (shown in FIG.
4). The heat-insulating tube 20 is of conical cylindrical shape and
mated with the conical cylindrical wall 11. Moreover, the external
wall 22 of the heat-insulating tube 20 is designed with a smooth
surface, so this can facilitate advertisement printing and
fabrication on the surface of heat-insulating paper cup, thus
increasing the visibility of the business performance and improving
the value of the products. Meanwhile, the users are allowed to hold
stably the heat-insulating tube 20 which can prevent efficiently
heat transfer and avoid the scalding of hot liquid stored in the
cup body 10 to ensure the safety of utilization.
[0035] Multiple raised lines 23 are protruded at interval onto the
inner wall 21 of the heat-insulating tube 20 at an oblique angle,
and mated with the conical cylindrical wall 11 of the cup body 10.
Said raised line 23 permits to reduce the contact area with the cup
body 10, helping to cut down efficiently the heat transfer.
[0036] Multiple hollow ducts 24, set into the heat-insulating tube
20 at interval and at an oblique angle in tune with the raised
lines 23.
[0037] Referring to FIGS. 2, 7 and 8, a second cup bottom 30 is
located at the bottom of annular underframe 121 of the cup bottom
12, so that an interval space 40 is formed between second cup
bottom 30 and cup bottom 12; and an annular side frame 31 folded
downwards is set on the periphery of the second cup bottom 30, and
also located below the annular underframe 121 of the cup bottom
12.
[0038] Referring to FIGS. 2, 7 and 8, a bottom extension folded
edge 50 is extended downwards from the bottom of the
heat-insulating sleeve 20; said bottom extension folded edge 50 is
also located beyond the annular underframe 121 of the cup body 10
and the annular side frame 31 of the second cup bottom 30. The
lower end of bottom extension folded edge 50 is folded inwards and
upwards to form a folded flange 51, which is abutted to the inner
side of annular side frame 31 of the second cup bottom 30.
[0039] Of which, the heat-insulating tube 20 is made of corrugated
paper, so the corrugated inner layer of the corrugated paper is
defined to form said raised line 23 and hollow duct 24. Said hollow
duct 24 will then be ventilated to avoid vacuum suction due to
tight sleeving between annular space of heat-insulating paper cup,
and enable easier removal of the closely overlapped heat-insulating
paper cups.
[0040] Of which, said raised line 23 is available with multiple
patterns. Referring to FIGS. 2 and 3, said raised line 23 is
extended obliquely from the top to the bottom of the
heat-insulating tube 20. Or, referring to FIG. 6, said raised line
23 is extended transversely into a wavy pattern between the top and
bottom of the heat-insulating tube 20.
[0041] Based on above-specified structural design, said
heat-insulating paper cup is formed by the steps in FIG. 5, wherein
the unfolded heat-insulating tube 20 is folded into a conical
cylindrical pattern in tune with the cup body 10, and the inner
wall 21 of the conical cylindrical heat-insulating tube 20 is
coated with glue W. Next, the cup body 10 is sleeved onto it such
that the heat-insulating tube 20 and the conical cylindrical wall
11 of the cup body 10 are adhered by glue W (in conjunction with
FIG. 4).
[0042] Referring also to FIG. 8, the second cup bottom 30 is
abutted to the bottom of the annular underframe 121 of cup bottom
12, and then the bottom extension folded edge 50 is folded. Based
on the structural characteristics of said second cup bottom 30 and
the bottom extension folded edge 50, an extended strengthening
structure is formed at the bottom of the annular underframe 121 of
the cup bottom 12. Therefore, referring to FIG. 9, when another cup
body 10B is overlapped onto the cup body 10, since the bottom of
the cup body 10B is higher than the conventional paper cup (marked
by W), the bottom extension folded edge 50 on the cup body 10B is
abutted onto the cup bottom 12 of the cup body 10 before the
conical cylindrical walls 11 of two cup bodies 10, 10B are abutted
to each other. In this case, the cup body 10B will not continue to
fall, thus preventing excessive pressing of the conical cylindrical
walls 11 of the cup bodies 10 and 10B. And multiple raised lines 23
set on the inner wall 21 of the heat-insulating sleeve 20 can also
be prevented from deformation by extruding to ensure the expected
and best heat-insulating effect. With the setting of the second cup
bottom 30, another bottom structure could be formed at interval at
the cup bottom 12 of the cup body 10, helping to make up the
shortcomings of the original cup bottom 12 such as: single-layer
structure and week heat preservation effect, and significantly
improve the bottom's structural strength and heat preservation
effect of the heat-insulating paper cups.
[0043] Referring also to FIG. 10, a curved retracted segment 315 is
formed on the upper part of the annular side frame 31 of the second
cup bottom 30, and also abutted to the inner side of annular
underframe 121 at the cup bottom 12 of the cup body 10. In the
preferred embodiment, outer diameter difference exists at the upper
and lower parts of the annular side frame 31 of the second cup
bottom 30 with the setting of the curved retracted segment 315, so
that the mating of the second cup bottom 30 and the annular
underframe 121 has embedded positioning effect, which is more
conducive to stability and smoothness in the mating process.
* * * * *