# US 12,151,852 B2 · Paper cup of dual structure and method for manufacturing same

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- Number: US 12,151,852 B2
- Document ID: US12151852B2
- Status: Granted
- Kind: B2
- Application number: 17/273,336
- Filed: 2019-09-06
- Published: 2021-10-21
- Granted: 2024-11-26
- Earliest claimed: 2018-09-07
- Applicants: Bong Yoon Woo; Ji Youn Woo
- Inventors: Bong Yoon Woo; Ji Youn Woo
- Web page: https://patentgrep.com/patent/US12151852B2

## CPC

- B65D 3/22: with double walls; with walls incorporating air-chambers; with walls made of laminated material {(for thermal insulating purposes B65D81/3818)}
- A47G 19/2205: {Drinking glasses or vessels (A47G19/23 takes precedence)}
- B31B 50/28: around mandrels, e.g. for forming bottoms
- B31B 50/62: by adhesives
- B31C 7/02: Forming truncated cones
- B65D 3/14: Discs fitting within container end and secured by bending, rolling, or folding operations
- B65D 43/0208: {on both the inside and the outside of the mouth of the container (B65D43/0206 takes precedence)}
- B65D 43/0212: {only on the outside, or a part turned to the outside, of the mouth (B65D43/0206 takes precedence)}
- B65D 47/043: {with pouring baffles, e.g. for controlling the flow}
- B65D 81/3869: {formed with double walls, i.e. hollow}
- B31B 2105/00: Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
- B31B 2110/10: having a cross section of varying size or shape, e.g. conical or pyramidal
- B31B 2110/20: having a curved cross section, e.g. circular
- B31B 2120/10: provided with covers, e.g. lids
- B65D 3/06: essentially conical or frusto-conical
- B65D 81/3818: {formed with double walls, i.e. hollow}
- B65D 2543/00046: Drinking-through lids
- B65D 2543/00092: circular
- B65D 2543/00222: Hollow and made of one piece
- B65D 2543/00351: Dome-like
- B65D 2543/00518: Skirt
- B65D 2543/00527: NO contact
- B65D 2543/00537: on the outside, or a part turned to the outside of the mouth of the container
- B65D 2543/00555: on both the inside and the outside
- B65D 2543/00638: Rolled edge
- B65D 2543/00685: Totality
- B65D 2543/00759: Flange or lip
- B65D 2543/00796: Totality
- 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
- A47G: HOUSEHOLD OR TABLE EQUIPMENT (book-ends A47B5/00; knives B26B)
- B31B: MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER (making wound articles, e.g. wound tubes, B31C; combined making and filling B65B)
- B31C: MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER

## Abstract

A paper cup of a dual structure according to one embodiment of the present invention comprises: an inner paper part having a plurality of diameter adjusting portions formed at predetermined angle intervals on one surface; a drink receiving part formed extending from one end of the inner paper part and bending formed into the inner portion of the inner paper part; and a drinking part formed at a boundary between the inner paper part and the drink receiving part and curled in a radially outward direction of the drink receiving part.

## Claims

### Claim 1

A paper cup having a dual structure, comprising:
an inner paper part having a plurality of diameter adjusting portions formed at predetermined angular intervals on one surface thereof;
a grip part configured to cover an outer surface of the inner paper part and is coupled to the plurality of diameter adjusting portions;
a drink receiving part formed to extend from one end of the inner paper part and to be bent towards an inner portion of the inner paper part;
a drinking part formed at a boundary between the inner paper part and the drink receiving part and rolled in a radially outward direction of the drink receiving part;
a first bottom part formed at one end of the drink receiving part and adhesively coupled to the end of the drink receiving part so as to alternate with the end of the drink receiving part; and
a second bottom part formed at one end of the inner paper part and adhesively coupled to the end of the inner paper part so as to alternate with the end of the inner paper part,
wherein a space between the inner paper part and the drink receiving part is sealed by the first bottom part and the second bottom part so as to form an adiabatic space,
wherein the plurality of diameter adjusting portions are formed to protrude to the outside of the inner paper part, the grip part is coupled to protruding regions of the plurality of diameter adjusting portions so as to cover the outer surface of the inner paper part, the plurality of diameter adjusting portions forms an adiabatic space between the inner paper part and the grip part.

### Claim 2 (depends on 1)

The paper cup according to claim 1, further comprising a lid part comprising a first protrusion fitted on the drinking part, a second protrusion connected to the first protrusion through a recess so as to be formed consecutively with the first protrusion and configured to have a through hole formed through an upper surface thereof, and an adiabatic part having a regular thickness and formed on a lower surface of the lid part so as to form a lid adiabatic space.

### Claim 3

A method for manufacturing a paper cup having a dual structure, the method comprising:
rolling one paper member configured such that an inner paper part and a drink receiving part are connected, into a truncated conical shape;
folding the drink receiving part towards an inner portion of the inner paper part along a boundary at which the inner paper part and the drink receiving part come into linear contact with each other;
adjusting a diameter of the inner paper part by forming a plurality of diameter adjusting portions at predetermined angular intervals on one surface of the inner paper part so as to protrude in a radially outward direction of a lower end of the inner paper part;
forming a drinking part by rolling a region between the inner paper part and the drink receiving part in a radially outward direction of the drink receiving part;
forming a first bottom part at one end of the drink receiving part to be adhesively coupled to the end of the drink receiving part so as to alternate with the end of the drink receiving part; and
forming a second bottom part at one end of the inner paper part to be adhesively coupled to the end of the inner paper part so as to alternate with the end of the inner paper part.

### Claim 4 (depends on 3)

The method according to claim 3, further comprising:
adhesively coupling a grip part to the inner paper part so as to cover an outer surface of the inner paper part.

### Claim 5 (depends on 4)

The method according to claim 4, further comprising:
coupling a lid part, comprising a first protrusion fitted on the drinking part, a second protrusion connected to the first protrusion through a recess so as to be formed consecutively with the first protrusion and configured to have a through hole formed through an upper surface thereof, and an adiabatic part having a regular thickness and formed on a lower surface of the lid part so as to form a lid adiabatic space, to the drinking part.

### Claim 6 (depends on 4)

The method according to claim 4, wherein, in the adhesively coupling the grip part to the inner paper part, the grip part is coupled to protruding regions of the diameter adjusting portions, formed to protrude in a radially outward direction of the inner paper part, so as to cover the outer surface of the inner paper part.

### Claim 7 (depends on 3)

The method according to claim 3, wherein, in the forming the first bottom part and in the forming the second bottom part, a space between the inner paper part and the drink receiving part is sealed by the first bottom part and the second bottom part so as to form an adiabatic space.

### Claim 8 (depends on 7)

The method according to claim 7, wherein the adiabatic space is formed to have a uniform thickness.

### Claim 9

A method for manufacturing a paper cup having a dual structure, the method comprising:
adjusting a diameter of an outer cup configured to constitute an inner paper part by forming a plurality of diameter adjusting portions at predetermined angular intervals on one surface of the outer cup so as to protrude in a radially outward direction of a lower end of the outer cup;
inserting an inner cup into the outer cup;
forming a drinking part by rolling outer circumferences of the outer cup and the inner cup in the radially outward direction; and
adhesively coupling a grip part to the protruding regions of the plurality of diameter adjusting portions to cover the outer surface of the outer cup,
wherein the plurality of diameter adjusting portions forms an adiabatic space between the inner paper part and the grip part, and the width of the adiabatic space is adjusted by adjusting the length of the protrusion of the plurality of diameter adjusting portions.

### Claim 10 (depends on 9)

The method according to claim 9, further comprising:
coupling a lid part, comprising a first protrusion fitted on the drinking part, a second protrusion connected to the first protrusion through a recess so as to be formed consecutively with the first protrusion and configured to have a through hole formed through an upper surface thereof, and an adiabatic part having a regular thickness and formed on a lower surface of the lid part so as to form a lid adiabatic space, to the drinking part.

### Claim 11

A paper cup having a dual structure, comprising:
an inner paper part having a plurality of diameter adjusting portions formed at predetermined angular intervals on one surface thereof;
a grip part configured to cover an outer surface of the inner paper part and is coupled to the plurality of diameter adjusting portions;
a drink receiving part formed to extend from one end of the inner paper part and to be bent towards an inner portion of the inner paper part so as to contain a drink within the inner paper part;
a drinking part formed at a boundary between the inner paper part and the drink receiving part and rolled in a radially outward direction of the drink receiving part;
a first protrusion fitted on the drinking part;
a second protrusion connected to the first protrusion through a recess to be formed consecutively with the first protrusion and configured to have a through hole formed through an upper surface thereof and an inner receiving part formed therein;
a first bottom part formed at one end of the drink receiving part and adhesively coupled to the end of the drink receiving part so as to alternate with the end of the drink receiving part;
a second bottom part formed at one end of the inner paper part and adhesively coupled to the end of the inner paper part so as to alternate with the end of the inner paper part, wherein a space between the inner paper part and the drink receiving part is sealed by the first bottom part and the second bottom part so as to form an adiabatic space; and
a lower lid part comprising an outer circumferential wall coupled to an inner surface of an inner circumference of the second protrusion, an adiabatic member configured to extend from the outer circumferential wall and separated from an inner upper surface of the second protrusion so as to form an adiabatic space, and a drinking path part configured to enable the drink receiving part and the through hole to communicate with each other;
wherein the plurality of diameter adjusting portions are formed to protrude to the outside of the inner paper part, the grip part is coupled to protruding regions of the plurality of diameter adjusting portions so as to cover the outer surface of the inner paper part, the diameter adjusting portions forms an adiabatic space between the inner paper part and the grip part.

### Claim 12 (depends on 11)

The paper cup according to claim 11, wherein the drinking path part is formed to be sealed in the adiabatic space, and comprises at least one guide member formed in a direction perpendicular to a space of a drinking path configured to connect the drink receiving part and the through hole, and coupled to the drinking path so as to enable a drink in the drink receiving part to flow therein.

### Claim 13 (depends on 12)

The paper cup according to claim 12, wherein the drinking path part is configured such that one side wall and a remaining side wall disposed opposite the one side wall are coupled to be mutually sealed to form the space of the drinking path, and the at least one guide member comprises a first guide member configured to extend the one side wall in a direction towards the remaining side wall so as to be separated from the remaining side wall and a second guide member configured to extend the remaining side wall in a direction towards the one side wall so as to be separated from the one side wall, the first guide member and the second guide member being formed so as to alternate with each other in a length direction of the space of the drinking path.

### Claim 14 (depends on 13)

The paper cup according to claim 13, wherein one end of the first guide member in the direction towards the remaining side wall and one end of the second guide member in the direction towards the one side wall are located so as to overlap each other in the length direction of the space of the drinking path.

### Claim 15 (depends on 14)

The paper cup according to claim 14, wherein the one end of the first guide member in the direction towards the remaining side wall and the one end of the second guide member in the direction towards the one side wall are located at positions coinciding with each other in the length direction of the space of the drinking path.