Paper cup of dual structure and method for manufacturing same

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.

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.

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.