Patent Publication Number: US-8523008-B2

Title: Insulation sleeve for cup

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is based on and claims priority from Korean Patent Application No. KR20-2009-0001420, KR10-2009-0012943 and KR20-2009-0002108, each filed on 10 Feb. 2009, 17 Feb. 2009 and 25 Feb. 2009 in the Korean Intellectual Property Office and International Application No. PCT/KR2009/004038, filed on 13 Aug. 2009 in the World Intellectual Property Organization, the disclosure of which is incorporated herein in its entirety by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an insulation sleeve holding a cup, and more particularly, to an insulation sleeve including a protrusion formed on a sidewall of the cup which is caught by a finger of a user&#39;s hand, so that, in a case where the cup is filled with a hot content, the user can easily and safely grip the cup, without slippage, at movement with the cup. 
     2. Description of the Prior Art 
     A disposable paper cup is usually used at, for example, a take-out coffee shop as a container filling a drink. The paper cup is generally made of thin paper, because of its disposable property. 
     If the paper cup is filled with a hot drink such as coffee, the temperature of the drink is quickly transmitted to the surface of the paper cup, the paper cup itself is very hot, and thus it is inconvenient for the user to grip the hot paper cup. 
     In addition, if the user holds the cup with his or her finger by a narrow margin so as to avoid the hot, the user may drop the paper cup, and the user may suffer scald due to spilled coffee. 
     In order to solve the above problem, a holder (sleeve)  11  holding a sidewall of the cup  10  is used, as shown in  FIG. 1 . The sleeve  11  forms an insulating layer on the sidewall of the cup  10  to eliminate somewhat the hot of the cup. 
     The sleeve  11  is usually made of paper, and the sleeve  11  has a smooth surface so as to form a printing surface for advertisement. 
     The sleeve  11  has a little insulation function, but the sleeve  11  is easily slipped on the user&#39;s hand because of the smooth surface thereof. 
     In addition, the sleeve  11  made of the paper has a hygroscopic property, but the outer surface is dried due to the high temperature of the content filled in the cup  10 . Therefore, the outer surface is further smooth, and thus the sleeve may be more easily slipped on the hand. 
     As a result, the user strongly holds the sleeve so that the cup is not slipped on the hand. Thus, even though the sleeve is used, the high temperature of the cup is transmitted to the sleeve intact, the difficult in the gripping exists still. 
     There is another problem in that the sleeve is easily slipped down. For example, when the cup filled with hot coffee or cold drink is laid on a table for the purpose of conversation, the sleeve holding the cup on the table is frequently slipped down. Consequently, in a case where the user wants to drink the coffee or drink, the user has to raise the sleeve slipped down. 
     SUMMARY OF THE INVENTION 
     Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art while advantages achieved by the prior art are maintained intact. 
     One object of the present invention is to provide an insulation sleeve including an anti-slip means naturally protruding from the sleeve in an outward direction when a cup is accommodated in the insulation sleeve, so that the anti-slip means is caught by a finger of a hand gripping the cup. 
     Another object of the present invention is to provide an insulation sleeve which can allow a user to fully grip the sleeve without slippage, when the user moves with the cup filled with contents. 
     Still another object of the present invention is to provide an insulation sleeve which is not easily slipped down after the cup is worn with the insulation sleeve. 
     Still another object of the present invention is to provide an insulation sleeve capable of preventing an anti-slip means when the insulation sleeve is manufactured or is shipped. 
     Still another object of the present invention is to provide an insulation sleeve capable of representing characters or symbols at a predetermined temperature when a cup is filled with hot coffee. 
     In order to accomplish these objects, there is provided an insulation sleeve for a cup, according to an embodiment of the present invention, which includes a sleeve body having a hollow portion which is formed when a force is applied both corners of the folded sleeve body so as to accommodate and support the cup therein; and a pair of protrusions formed by a  -shaped cut line provided on the sleeve body, and protruding from the sleeve body in an outward direction when the hollow portion is provided, so that the protrusions are caught by a an upper portion of a finger of a hand gripping the sleeve body. 
     According to another aspect of the present invention, there is provided an insulation sleeve for a cup, which includes a sleeve body having a hollow portion which is formed when a force is applied both corners of the folded sleeve body so as to accommodate and support the cup therein; and a pair of protrusions formed by a ⊥-shaped cut line provided on the sleeve body, and protruding from the sleeve body in an outward direction when the hollow portion is provided, so that the protrusions are caught by a an upper portion of a finger of a hand gripping the sleeve body. 
     According to still another aspect of the present invention, there is provided an insulation sleeve for a cup, which includes a sleeve body having a hollow portion which is formed when a force is applied both corners of the folded sleeve body so as to accommodate and support the cup therein; and a pair of protrusions formed by a ⊂-shaped cut line provided on the sleeve body, and protruding from the sleeve body in an outward direction when the hollow portion is provided, so that the protrusions are caught by a an upper portion of a finger of a hand gripping the sleeve body. 
     According to still another aspect of the present invention, there is provided an insulation sleeve for a cup, which includes a sleeve body having a hollow portion which is formed when a force is applied both corners of the folded sleeve body so as to accommodate and support the cup therein; and a pair of protrusions formed by a L-shaped cut line provided on the sleeve body, and protruding from the sleeve body in an outward direction when the hollow portion is provided, so that the protrusions are caught by a an upper portion of a finger of a hand gripping the sleeve body. 
     The insulation sleeve further includes a  -shaped or ⊂-shaped cut line on a portion of the sleeve body which is spaced apart from the cut line in a downward direction by at least a width of the finger, in which a support portion protrudes from the sleeve body in an outward direction when the hollow portion is provided. 
     An outer wall of the insulation sleeve for the cup may be printed with a character or symbol which can be represented according to a variation of temperature. 
     The cut line may be formed by cutting at least one joint portion which is formed on the cut line. 
     An end of the cut line is provided with an extension cut line. 
     With the above description, according to the insulation sleeve for the cup of the present invention, since the sleeve body is provided with the protrusions protruding from the sidewall thereof, the protrusions are caught by the fingers of the hand gripping the sleeve body to prevent the slippage. 
     Further, since the protrusions naturally protrude from the sleeve body in the outward direction in the process of opening the folded sleeve body, it is not necessary for separate manipulation to bring the protrusion to protrude. 
     Since the protrusions formed integrally with the sleeve body can be resiliently bent in view of its material property, the user can grip the sleeve body with the protrusions. 
     Further, since the cut line is formed by a simple cutting manner, a manufacturing cost or manufacturing process is not complicated, as compared with a conventional sleeve. 
     Since the protrusions do not protrude from the sleeve body in the outward direction in a stat in which the sleeve body is folded, the packaging convenience or packaging volume is not different from the conventional sleeve, even though the cut line is formed. 
     In addition, the protrusions protruding from the sidewall of the sleeve body occupies an area which is required for the finger gripping the upper portion of the sleeve body, so that it does not obstruct the formation of the printed surface for advertisement on the sidewall of the sleeve body. 
     Further, since the user can smoothly grip the cup by the protrusions, the gripping is easy and the movement of the held cup is safe. Also, the heat conduction to the hand is minimized. 
     In the case in which the uncut joint portion is formed on the cut line, it is possible to prevent the protrusions from being moved at the packaging, carrying, or keeping and thus prevent the deformation or damage of the protrusions. 
     Further, in the case in which the support portion is provided, in addition to the protrusion, the fingers gripping the sleeve body are supported at upper and lower sides, it is possible to reliably hold the cup. 
     In addition, since the characters or symbols printed on the outer wall of the cup sleeve are represented at a predetermined temperature, it is possible to allow the consumer to predict the temperature of the coffee when he or she grips the sleeve holding the cup, thereby preventing the consumer from scalding. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  is a perspective view of a cup sleeve of a related art; 
         FIG. 2  is a perspective view illustrating a state in which a cup is accommodated in a sleeve according to a first embodiment of the present invention; 
         FIG. 3  is a deployment view of the sleeve in  FIG. 2 ; 
         FIG. 4  is a perspective view illustrating a state in which a sleeve body of the sleeve in  FIG. 2  is folded; 
         FIG. 5  is a perspective view illustrating a state in which protrusions protrude as the sleeve body in  FIG. 4  is opened wide; 
         FIG. 6  is a view illustrating a use state of the sleeve shown in  FIG. 2 ; 
         FIG. 7  is a deployment view of a sleeve according to a second embodiment of the present invention; 
         FIG. 8  is a perspective view illustrating a state in which the sleeve body in  FIG. 7  is folded; 
         FIG. 9  is a perspective view illustrating a state in which protrusions protrude as the sleeve body in  FIG. 7  is opened wide; 
         FIG. 10  is a perspective view illustrating a state in which a cup is accommodated in an insulation sleeve according to a third embodiment of the present invention; 
         FIG. 11  is a perspective view illustrating another example of the protrusion in  FIG. 10 ; 
         FIGS. 12 to 14  are cross-sectional views illustrating various protruding directions of the protrusions in  FIG. 10 ; 
         FIG. 15  is a view illustrating a use state of the sleeve in  FIG. 10 ; 
         FIG. 16  is a perspective view illustrating a state in which a cup is accommodated in an insulation sleeve according to a fourth embodiment of the present invention; 
         FIG. 17  is a perspective view illustrating another example of the protrusions in  FIG. 16 ; 
         FIG. 18  is a perspective view illustrating a state in which the sleeve body in  FIG. 16  is folded; 
         FIG. 19  is a perspective view illustrating a sleeve according to a fifth embodiment of the present invention; 
         FIG. 20  is a deployment view of the sleeve in  FIG. 19 ; 
         FIG. 21  is a perspective view illustrating a state in which a cup is accommodated in a sleeve according to a sixth embodiment of the present invention; 
         FIG. 22  is a deployment view of the sleeve in  FIG. 21 ; 
         FIG. 23  is a perspective view illustrating a state in which a cup is accommodated in a sleeve according to a seventh embodiment of the present invention; 
         FIG. 24  is a deployment view of the sleeve in  FIG. 23 ; 
         FIG. 25  is a perspective view illustrating a state in which a cup is accommodated in a sleeve according to an eighth embodiment of the present invention; 
         FIG. 26  is a deployment view of the sleeve in  FIG. 25 ; and 
         FIG. 27  is a view illustrating a use state of the sleeve in  FIG. 25 . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The matters defined in the description, such as the detailed construction and elements, are nothing but specific details provided to assist those of ordinary skill in the art in a comprehensive understanding of the invention, and thus the present invention is not limited thereto. 
       FIGS. 2 to 6  illustrate an insulation sleeve according to a first embodiment of the present invention.  FIG. 2  is a perspective view illustrating a state in which a cup is accommodated in the sleeve according to the first embodiment of the present invention.  FIG. 3  is a deployment view of the sleeve in  FIG. 2 .  FIG. 4  is a perspective view illustrating a state in which the sleeve body of the sleeve in  FIG. 2  is folded.  FIG. 5  is a perspective view illustrating a state in which protrusions protrude from the sleeve body as the sleeve body in  FIG. 4  is opened wide.  FIG. 6  is a view illustrating a use state of the sleeve shown in  FIG. 2 . 
     A sleeve  1  according to the first embodiment of the present invention includes a sleeve body  100  and a pair of protrusions  210 , as shown in  FIGS. 2 to 6 . 
     The holder (sleeve) body  100  is made of any material such as plastic or paper, and is preferably made of paper, in particular, a corrugated cardboard, in view of a manufacturing cost. 
     The corrugated cardboard is a paper-based material consisting of a fluted corrugated sheet and one or two flat linerboards adhered to the fluted corrugated sheet by an adhesive. 
     If the sleeve body  100  is formed of a corrugated cardboard, there is an advantage of enhancing a heat insulating function due to an air layer formed between valleys of the corrugated sheet. 
     As shown in  FIGS. 3 to 5 , the sleeve body  100  is formed in a flat shape in such a manner that both ends are overlapped with each other. 
     A hollow portion  101  is formed in the sleeve body  100  so as to hold the cup  10  therein, when a force is applied to both corners in a state in which the sleeve body  100  is folded. 
     So as to hold the cup  10  in the hollow portion  101 , the hollow portion  101  has a diameter which is gradually decreased from the upper portion toward the lower portion. 
     In this embodiment, the sidewall of the sleeve body  100  is provided with a I-shaped (corresponding to an H shape which is rotated at right angle)  110 , as shown in  FIG. 3 . 
     As the cut line  110  is formed, a pair of opposite protrusions  210  are formed on an inside of the cut line  110 . 
     The pair of protrusions  210  protrude in an outward direction from the sleeve body  100  in a process of accommodating the cup  10 . 
     Fingers of the hand gripping the sleeve body  100  are caught by the pair of protrusions  210 , thereby preventing the sleeve body  100  from sliding in the hand. 
     Taking the gripping of the sleeve body  100  with a user&#39;s hand into consideration, it is preferable to form the cut line  110  on the upper portion of the sleeve body  100 . In this embodiment, the cut line  110  is formed at a position spaced apart from the uppermost end of the sleeve body  100  at a predetermined distance. 
     The pair of protrusions  210  protrudes in an outward direction from the sleeve body  100  in a state in which the hollow portion  101  is formed in the sleeve body  100 . More specifically, the protrusion  210  is gradually away from the sidewall of the sleeve body  100  toward a free end thereof. 
     As shown in  FIGS. 3 and 4 , the outer wall of the sleeve body  100  may be printed with characters or symbols  117  (e.g., heart-shaped symbol or hot) by using thermochromic ink. This allows a consumer preferring a hot coffee to figure out proper temperature of the hot coffee in a case where any coffee heated by proper temperature has good taste and redolence, and allows the consumer to predict the temperature of the coffee when he or she grips the sleeve holding the cup, thereby preventing the consumer from scalding. 
     Further, the characters or symbols specially printed (by using the thermochromic ink) may be represented above or under predetermined temperature (when cold drink is filled therein). 
     The printed characters or symbols  117  are provided so as not to overlap with other printings (e.g., company&#39;s logo) of the cup sleeve, and the company&#39;s logo may be specially printed. 
     Although not shown, characters or symbols may be printed on a predetermined position of the cup (a portion which is not covered by the cup sleeve), so that the consumer recognizes the temperature of the coffee or drink to enjoy the taste and redolence. 
     The thermochromic ink is well known in the art, and the detailed description is omitted herein. However, in this embodiment, color representing temperature of the cup is set to about 90 degrees, and a color temperature variation of the cup sleeve is set to about 50 to 70 degrees. Of course, the temperature set can be adjusted depending upon a component ratio of the ink, and the color represented by the cold drink and the temperature set of the changed color can be selected. 
     The formation of the cut line  110  will be described in detail. 
     As shown in  FIG. 3 , upper and lower cut lines  111  and  113  are formed in a horizontal direction on the sleeve body  100  at a predetermined interval in a vertical direction. In this instance, the cut lines  111  and  112  are not necessarily parallel with each other, and the direction of the cut lines  111  and  112  is not necessarily formed in the horizontal direction. The cut line  113  is formed in a vertical direction on the sleeve body from the upper end to the lower end between the cut lines  111  and  112 . 
     The cut line  110  formed by the cut lines  111 ,  112  and  113  forms the I shape (corresponding to an H shape which is rotated at right angle), and the portion which is divided into two parts by the cut line  113  formed in the vertical direction forms the pair of protrusions  210 . 
     It is preferable that the cut lines  111  and  112  formed in the horizontal direction have a predetermined width so as not to cause friction between the protrusions  210  when the protrusions  210  protrude. The cut line  113  formed in the vertical direction may have a predetermined width. 
     That is, the cut line  110  is formed to have the minimum width so as not to cause the friction in a process of protruding the protrusions  210 , and this feature is similar to cut lines  120 ,  130  and  140  which will be described below in the following embodiments. 
     In order to further protrude the protrusions  210 , the end portion of the cut lines  111  and  112  formed in the horizontal direction may be provided with extension cut line  900 . More specifically, as shown in the figure, the extended cut line  900  extended in the length of 0.5 mm to 3 mm may be formed on the both ends of the upper cut line  111 , and the extension cut line  900  having the same length may be formed on both ends of the lower cut line  112 . In this instance, the extension cut line  900  may be inclined at both ends of the cut lines  111  and  112  at an angle of about 20 to 50 degrees. The number, length and direction of the extension cut line  900  are not limited to the shown and described embodiment, and those may be altered if necessary. Further, the extension cut line  900  may be formed in cut lines  120 ,  130 ,  140 ,  160  and  170  of the following embodiments, as the cut line  110  of this embodiment. 
     According to the cut line  110  formed as described above, as shown in  FIG. 5 , when the sleeve body  100  is opened wide so as to form the hollow portion  101 , the cut line  110  is bent. In this instance, the pair of protrusions  210  are not bent, but protrude in the outward direction from the sleeve body  100 . 
     One cut line  110  may be formed on the sidewall of the sleeve body  100 . Alternatively, another cut line  110  may be formed at a position opposite to the sidewall of the sleeve body  100 . In this instance, the protrusions  210  are formed on both sides of the sleeve body  100 , so that the protrusions  210  formed at both sides of the sleeve body  100  are caught by the fingers of the hand gripping the sleeve body  100 . Further, it is reasonable that the opposite protrusion  210  may be installed at different position in view of a difference in length of fingers of westerners and Asians or a difference in length of fingers of individual. 
     The feature of the protrusions  210  formed on both sides of the sleeve body  100  may be applied to protrusions  210  and  220  of the following embodiments which will be described below. 
     Opposite folding lines  102  may be formed on both sides of the sleeve body  100 , as shown in  FIGS. 3 to 5 . 
     The folding lines  102  are provided to fold the sleeve body  100  in a flat form so that a space occupied by the respective sleeves  1  is minimized when the sleeves  1  are manufactured and packed with packaging or the sleeves  1  are carried. 
     If the folding line  102  is formed, as shown in  FIG. 4 , the sleeve body  100  is folded in such a manner that the front surface and the rear surface are close to each other. In this instance, the front surface and the rear surface of the sleeve body  100  are formed in a flat form, in which the pair of protrusions  210  are formed in the same plane as the sleeve body  100 . 
     Since the pair of protrusions  210  are formed integrally with the sleeve body  100 , if the sleeve body  100  is not bent, but folded in a flat form, the pair of protrusions  210  also form the same plane with the sleeve body  100 . 
     In this instance, if the sleeve body  100  is opened wide, as shown in  FIG. 5 , that is, if a force is applied to both corners of the sleeve body  100  formed with the folding lines  102  to approach each other, the sleeve body  100  is bent to form a curved surface, and the cut line  110  is also bent. In this instance, since the pair of protrusions  210  are not bent unless other external force acts on the protrusions, the protrusions are away from the sidewall of the sleeve body  100  toward the free end. As a result, the protrusions protrude in the outward direction from the sleeve body  100 . 
     Accordingly, the protrusions  210  naturally protrude in the process in which the folded sleeve body  100  is opened wide to form the hollow portion  101 . If the cup  10  is retracted from the sleeve  1  and then the sleeve body  100  is again folded, the protrusions  210  are on the same plane as the sleeve body  100 . 
     Since the protrusions  210  can be bent by the external force, the user can grasp the sleeve body together with the protrusions  210 , if necessary, in a case in which the protrusions  210  protrude from the sleeve body  100 . 
     The cut line may be formed at any position of the sleeve body  100 . The cut line  110  may be formed on the sleeve body  100  formed with the folding line  102 , and as shown in  FIGS. 3 to 5 , be divided into both sides on the basis of the folding line  12 . 
     In this instance, each of the pair of protrusions  210  is positioned on the front and rear surfaces of the sleeve body  100  in a state in which the sleeve body  100  is folded, as shown in  FIG. 4 . It is preferable that each end portion of the protrusions  210  coincides with an extension line of the folding line  102  so as not to protrude the protrusion  210  from the sleeve body  100  in a lateral direction. It is possible by bringing the longitudinal direction of the cut line  113  formed in the vertical direction and the longitudinal direction of the folding line  102  to coincide with each other. 
     It is preferable that the folding line  102  is formed on both sides of the sleeve body  100  on the basis of the portion  103  to which both ends of the sleeve body  100  are connected. 
     Since both ends of the sleeve body  100  are overlapped and connected, the thickness of the connected portion  103  is twice as much as the other portion of the sleeve body  100 . Accordingly, the connected portion  103  is less bent than other portion. 
     Therefore, if the folding line  102  is roughly equidistant from the connected portion  103 , the hollow portion  101  is not biased when the sleeve body  100  is opened wide. 
     In addition, in the pair of protrusions  210 , one protrusion (referred to as a first protrusion) which is farther far from the connected portion  103  may be formed in long length relative to another protrusion (referred to as a second protrusion) which is closer to the connected portion. 
     This is considered that the connected portion  103  is less bent. Since the sleeve body farther far from the connected portion  103  is relatively less bent than the sleeve body closer to the connected portion, the first protrusion which is farther far from the connected portion  103  may protrude from the sidewall of the sleeve body  100  in a narrow interval in comparison to the second protrusion) which is closer to the connected portion. Accordingly, the first protrusion  211  is formed more long than a length of the second protrusion  212  so as to generally match the protruding amount of the first and second protrusions  211  and  212 . 
     Although not shown, the folding line  102  may be provided with a plurality of cut lines (now shown) spaced apart from each other at a predetermined interval along a longitudinal direction of the folding line  102 . The front and rear surfaces of the sleeve body  100  are completely in contact with each other in  FIG. 4  by the cut lines, thereby easily folding the sleeve body. 
       FIG. 6  shows the use state of the first embodiment. Since the protrusions  210  are caught by upper portions of the fingers, as shown in the figure, the user can gently grip the sleeve  1  without slippage, thereby reliably gripping the sleeve  1  in spite of the heat transmitted from the cup  10 . 
       FIGS. 7 to 9  show an insulating sleeve  2  for a cup according to a second embodiment of the present invention.  FIG. 7  is a deployment view of the sleeve according to the second embodiment of the present invention.  FIG. 8  is a perspective view illustrating a state in which the sleeve body in  FIG. 7  is folded.  FIG. 9  is a perspective view illustrating a state in which protrusions protrude as the sleeve body in  FIG. 7  is opened wide; 
     In this embodiment, the cut line  120  is formed on an upper sidewall of the sleeve body  100 . 
     In this embodiment, a cut line is formed in a horizontal direction on a position spaced apart from the uppermost end of the sleeve body  100  at a predetermined distance, and a cut line  122  is formed in a vertical direction on the sleeve body  100  positioned over the cut line  121 , thereby the ⊥-shaped cut line  120 . A pair of protrusions  210  are divided into two parts by the cut lines  122  of the vertical direction. 
     In this embodiment, the extension cut line  900  of the first embodiment may be formed in a downward inclined manner on the end portion of the cut line  120 , that is, the end portion of the cut line  121  of the horizontal direction. In this embodiment, the extension cut line  900  is to enhance the protruding property of the protrusion  210  and to bring the sleeve body in contact with the cup. 
     Further, as shown in the figure, a cut portion  118  is formed on the outer wall of the insulation sleeve body  100  to represent the symbol or character printed on the cup. 
       FIGS. 10 to 15  show an insulating sleeve for a cup according to a third embodiment of the present invention.  FIG. 10  is a perspective view illustrating a state in which a cup is accommodated in an insulation sleeve according to the third embodiment of the present invention.  FIG. 11  is a perspective view illustrating another example of the protrusion in  FIG. 10 .  FIGS. 12 to 14  are cross-sectional views illustrating various protruding directions of the protrusions in  FIG. 10 .  FIG. 15  is a view illustrating a use state of the sleeve in  FIG. 10 . 
     A cut line  130  is formed on a sleeve body  100  of an insulation sleeve  3 , and thus protrusions  220  protrude from the sleeve body  100  in an outward direction. 
     As shown in  FIG. 10 , the cut line  130  is formed in a ⊂-shape, and may be formed in a reverse direction. Alternatively, although not shown, the cut line may be formed in a ⊃-shape, and may be formed in a forward direction. 
     Since the sidewall of the sleeve body  100  is provided with the ⊂-shaped cut line  130  in a forward direction or a reverse direction, a protrusion  220  of a substantially rectangular shape is formed on the inside of the cut portion. 
     One end portion of the protrusion  220  is formed integrally with the sleeve body  100 , and the other end portion of the protrusion  220  is extended in a horizontal direction to form a free end. 
     Accordingly, in the state in which the sleeve body  100  is folded, the protrusions  220  are laid on the substantially same plane as the sleeve body  100 . When the sleeve body  100  is opened wide so as to accommodate the cup in the sleeve body  100 , that is, form a hollow portion  101 , the other end portion of the protrusion  220  protrudes from the sleeve body  100  in the outward direction, with the other end portion being away from the sidewall of the sleeve body  100 . 
     Since the protrusions  220  protruding in the outward direction are caught by upper portions of the fingers, the user can gently grip the sleeve body  100 , thereby reliably gripping the sleeve body  100  without slippage of the sleeve body. 
     It is preferable that considering that the sleeve body  100  is gripped, the cut line  130  and the protrusions  220  are formed at the upper portion of the sleeve body  100 .  FIG. 10  shows an example in which the cut line  130  and the protrusions  220  are formed at a position spaced apart from the uppermost end of the sleeve body  100  at a predetermined distance. 
       FIG. 11  shows another example of the protrusion  220  shown in  FIG. 10 . As shown in the figure, a lower portion of the protrusion  220  may be provided with a curved portion  201  corresponding to the shape of an upper surface of a finger catching the protrusion  220 . 
     Since the curved portion  201  of the protrusion comes in contact with the upper surface of the finger in a wrapping manner, the hand can grip the sleeve body  100  more reliably. The curved portion  201  may be applied to the protrusion  210  shown and described in the first and second embodiments and the protrusion  220  of other embodiments which will be described below. 
     In this instance, the protrusions  220  may be formed on both sides of the sleeve body  100 , as described in the first and second embodiments. In this instance, the extending direction of the protrusion  220  from the sleeve body  100  may be selected in various sizes by taking a size of the user&#39;s hand or a cup holding habit into consideration. Further, the protrusions  220  may be installed at different position by taking a length of the user&#39;s finger into consideration. 
     More specifically,  FIG. 12  shows an example in which any one of the protrusions  220  is formed in a clockwise direction, and the other is formed in counterclockwise direction. 
       FIG. 13  shows an example in which both protrusions  220  are formed in a clockwise direction, and  FIG. 14  shows an example in which both protrusions are formed in a counterclockwise direction. 
       FIG. 15  shows an example of a use state of the insulation sleeve  3  according to this embodiment. 
     As shown in the figure, the protrusions  220  are caught by the hand gripping the sleeve body  100  to prevent the slippage, so that the user can easily grip the sleeve body  100 . In the example in which the curved portion  201  is formed, the curved portion comes in contact with the upper surface of the finger in a wrapping manner, so that the hand can grip the sleeve body  100  more reliably. 
       FIGS. 16 and 18  show an insulation sleeve according to a fourth embodiment of the present invention.  FIG. 16  is a perspective view illustrating a state in which a cup is accommodated in the insulation sleeve according to the fourth embodiment of the present invention.  FIG. 17  is a perspective view illustrating another example of the protrusions in  FIG. 16 .  FIG. 18  is a perspective view illustrating a state in which the sleeve body in  FIG. 16  is folded. 
     According to the insulation sleeve  4  of this embodiment, a cut line  140  is formed on the upper end of a sidewall of the sleeve body  100 . 
     More specifically, as shown in  FIG. 16 , the cut line  140  is formed in a forward L-shape on the upper end of the sidewall of the sleeve body  100 , and may be formed in a reverse L-shape which is not shown. 
     Since the sidewall of the sleeve body  100  is provided with the cut line  140 , a protrusion  220  of a substantially rectangular shape is formed on the inside of the cut portion, similar to the first embodiment. 
       FIG. 17  shows an example in which the lower portion of the protrusion  220  shown in  FIG. 16  is provided with a curved portion  201 . 
     As shown in  FIG. 18 , it is preferable that the end of the protrusion  220  does not protrude in a lateral direction of the sleeve body  100  in a state in which the sleeve body  100  is folded along the fold line  102 . This is similar to the case of the third embodiment. 
       FIGS. 19 and 20  show an insulation sleeve according to a fifth embodiment of the present invention.  FIG. 19  is a perspective view illustrating the sleeve according to the fifth embodiment of the present invention.  FIG. 20  is a deployment view of the sleeve in  FIG. 19 . 
     The insulation sleeve is packaged or carried in a state in which the front and rear surfaces of the sleeve body  100  are closely folded, before the insulation sleeve holds the cup  10 , that is, the insulation sleeve is used by a user at a take-out shop. 
     In this instance, since the protrusion  220  does not protrude from the sleeve body  100 , but is flush with the sleeve body  100 , even though a plurality of insulation sleeves are stacked and packaged, there is no problem in the packaging process or carrying process in comparison with a conventional sleeve with no protrusion  220 . 
     The protrusion  220  may be deformed or damaged due to friction or collision with neighboring objects in the packaging or carrying process of the insulation sleeve  1 , in a keeping process before it is used in a shop such as take-out shop. 
     Accordingly, this embodiment provides a means for protecting the protrusion  220  from being damaged. 
     In this embodiment, a joint portion  190  is formed on the cut line  140  in the case of the insulation sleeve  4  of the fourth embodiment. 
     In this embodiment, the cut line  140  is not cut, and the joint portion  190  is formed on the cut line  140  integrally with the sleeve body  100 . The protrusion  220  does not protrude from the sleeve body  100  by the joint portion  190 , and is flush with the sleeve body  100 . 
     Consequently, the movement of the protrusion  220  is prevented by the joint portion  190 , so that the protrusion  220  is not damaged even though it fractionizes or collides with other object when packaging, carrying or keeping. 
     When the joint portion  190  is cut, the complete cut line  140  is formed, and thus the protrusion  220  protrudes from the sleeve body  100  in an outward direction. It is preferable that the joint portion  190  is easily cut by an external force. Accordingly, the joint portion  191  may be provided with a groove  191  on outer and inner surfaces (in the figure, the groove is formed on the outer surface) so as to minimize the vertical width or the thickness of the joint portion  190 . 
     In this instance, the external force may be an artificial force of the user. That is, in a state in which the sleeve body  100  is opened wide so as to accommodate the cup  10  in the sleeve body  100 , that is, the sleeve body  100  is opened wide so as to provide the hollow portion  101 , the user cuts the joint portion  190 , so that the protruding of the protrusion  220  can be guided. 
     In the process of accommodating the cup  10  in the sleeve body  100 , the joint portion  190  can be naturally cut. In this instance, the sleeve body  100  is moved from the lower side to the upward side by an indirect external force applied from the user so as to accommodate the cup  10  in the sleeve body  100 . When the sleeve body  100  is moved upward along the sidewall of the cup  10  to hold the cup  10 , the upper end of the sleeve body  100  reaching the sidewall of the cup  10  at a predetermined position is further widened by a direction external force which is generated by a diameter difference between the sidewall of the cut  10  at the predetermined position and the inner periphery of the sleeve body  100  at the upper end thereof. 
     One or more joint portion  190  may be provided, and in this embodiment, one joint portion is formed. A preferred position, at which the joint portion  190  is formed, is on the cut line  140  which is the end of the protrusion  220  in the horizontal direction and the uppermost portion thereof. Although not shown, at least two joint portions  190  may be formed on the cut line  110  in a spaced manner. 
       FIGS. 21 and 22  show the insulation sleeve for a cup according to a sixth embodiment of the present invention.  FIG. 21  is a perspective view illustrating a state in which the cup is accommodated in the sleeve according to the sixth embodiment of the present invention.  FIG. 22  is a deployment view of the sleeve in  FIG. 21 . 
     In this embodiment, an insulation sleeve  6  with the joint portion  190  formed on the cut line  120  is provided, as an alternative example of the insulation sleeve  2  according to the second embodiment. 
     The cut line  120  of this embodiment consists of a horizontal cut line  121  and a vertical cut line  122  to form a ⊥ shape, as described in the second embodiment. The joint portion  190  is formed on the cut line  120 , and the joint portion  190 , and the joint portion  190  is cut to form the complete cut line  120 . 
     In this embodiment, one joint portion  190  is formed on the vertical cut line  122  so as to easy cut the joint portion  190 . The present invention is not limited thereto, and two or more joint portion  190  may be formed on the cut line  120 , similarly to the fifth embodiment. 
     The joint portion  190  described and shown in  FIGS. 5 and 6  may not only be formed on the cut lies  120  and  140  of the second and fourth embodiments, but also be formed on the cut lines  110  and  130  of the first and third embodiments. 
       FIGS. 23 and 24  show the insulation sleeve for a cup according to a seventh embodiment of the present invention.  FIG. 23  is a perspective view illustrating a state in which the cup is accommodated in the sleeve according to the seventh embodiment of the present invention.  FIG. 24  is a deployment view of the sleeve in  FIG. 23 . 
     The insulation sleeve  7  of this embodiment is provided with a protrusion  210  similar to the protrusion  210  of the second embodiment, and a support portion  310  protruding from the lower portion of the protrusion  210 . 
     In recent years, low-volume cups, such as 6 ounces, generally used in a take-out coffee shop can be sufficiently applied to the heat sleeves  1 ,  2 ,  3 ,  4 ,  5 , and  6  shown in Embodiments 1 to 6. For high-volume cups, such as 13 ounces or more, however, the insulation sleeves of the first to sixth embodiments is not stable due to the weight of the cup including the content carried therein or the size of the cup itself. 
     If the sleeve body is provided with a support portion  310  so as to position a finger between the support portion and the protrusion  210 , the upper portion of the finger comes in contact with the protrusion  210  formed at the upper portion, the lower portion of the finger comes in contact with the support portion  310  formed at the lower portion, thereby reliably holding the sleeve body with the fingers. In the case of the high-volume cup of 13 ounces or more, since the upper and lower portions of the finger are supported, the user can reliably grip the cup when moving with the cup. 
     In this embodiment, it can be effectively applied to the cup of 13 ounces or more. 
     The support portion  310  will now be described in detail. 
     In this embodiment, the protrusion  210  similar to the protrusion  210  of the second embodiment is formed, and the sleeve body is further provided with the support portion  310  at a position below the protrusion  210 . The support portion  310  is spaced apart from the protrusion  210  by a width of a finger and protrudes from the sleeve body  100  in an outward direction. 
     In this instance, since the  -shaped cut line  160  is formed on the sleeve body  100  below the cut line  120  and is spaced apart from the cut line  120  by at least the width of a finger, the opposite support portions  310  are provided in pair. Similar to the protrusion  210 , when the sleeve body  100  is opened wide so as to form the hollow portion  101 , the support portions protrude from the sleeve body in an outward direction. 
     The support portion  310  has preferably a width so as not to cause friction in the process of protruding the support portions  310 . Similar to the protrusion  210 , the support portion  310  may be provided on both sides of the sleeve body  100 . Further, a joint portion  190  may be formed on the cut line  160  forming the support portion  310 . The feature of the support portion  310  may be applied to the support portion  320  according to the eighth embodiment which will be described below. 
     The above-described support portion  310  may be provided on the sleeve body  100  of the first embodiment, as well as the second embodiment. 
       FIGS. 25 to 27  show an insulation sleeve according to an eighth embodiment of the present invention.  FIG. 25  is a perspective view illustrating a state in which the cup is accommodated in the sleeve according to the eighth embodiment of the present invention.  FIG. 26  is a deployment view of the sleeve in  FIG. 25 .  FIG. 27  is a view illustrating a use state of the sleeve in  FIG. 25 . 
     The insulation sleeve  8  of this embodiment is provided with a support portion  320  having the same function as the above-described support portion  310 . 
     The support portion  320  of this embodiment is provided with a ⊂-shaped cut line  170  at a portion of the sleeve body  100  which is spaced apart from the cut line  140  by at least the width of a finger. Therefore, similar to the protrusion  220 , when the sleeve body  100  is opened wide so as to form the hollow portion  101 , the support portions protrude from the sleeve body in an outward direction. 
     The ⊂-shaped cut line  170  is formed in a forward direction, as shown in  FIG. 25 , and may be formed in a reverse direction. 
     An upper portion of the support portion  320  may be provided with a curved portion  301  corresponding to the shape of a lower surface of a finger. The curved portion  301  may be formed on the support portion  310  according to the seventh embodiment. 
     As shown in  FIG. 27 , the user can reliably grip the sleeve body  100 , with the finger being positioned between the protrusion  220  and the support portion  320 . 
     The support portion  320  may be formed on the sleeve body  100  of the third embodiment, as well as the sleeve body of the fourth embodiment. 
     In addition, in order to further protrude the protrusions  210  and  220  and the support portions  310  and  320 , the end portion of the cut lines may be provided with inclined extension cut line  900  of about 0.5 mm to about 3 mm, and the inclined angle is about 20 degrees to about 50 degrees. 
     Although it is described on the basis of the case in which the content filled in the cup  10  is hot, the present invention is not limited thereto. The present invention may be applied to a cold drink. In addition to the corrugated cardboard, paper having a predetermined thickness can be applied to the sleeve body. 
     With the above description, since the sleeve body is provided with the protrusions protruding from the sidewall thereof, the protrusions are caught by the fingers of the hand gripping the sleeve body to prevent the slippage. 
     Further, since the protrusions naturally protrude from the sleeve body in the outward direction in the process of opening the folded sleeve body, it is not necessary for separate manipulation to bring the protrusion to protrude. 
     Since the protrusions formed integrally with the sleeve body can be resiliently bent in view of its material property, the user can grip the sleeve body with the protrusions. 
     Further, since the cut line is formed by a simple cutting manner, a manufacturing cost or manufacturing process is not complicated, as compared with a conventional sleeve. 
     Since the protrusions do not protrude from the sleeve body in the outward direction in a stat in which the sleeve body is folded, the packaging convenience or packaging volume is not different from the conventional sleeve, even though the cut line is formed. 
     In addition, the protrusions protruding from the sidewall of the sleeve body occupies an area which is required for the finger gripping the upper portion of the sleeve body, so that it does not obstruct the formation of the printed surface for advertisement on the sidewall of the sleeve body. 
     Further, since the user can smoothly grip the cup by the protrusions, the gripping is easy and the movement of the held cup is safe. Also, the heat conduction to the hand is minimized. 
     In the case in which the uncut joint portion is formed on the cut line, it is possible to prevent the protrusions from being moved at the packaging, carrying, or keeping and thus prevent the deformation or damage of the protrusions. 
     Further, in the case in which the support portion is provided, in addition to the protrusion, the fingers gripping the sleeve body are supported at upper and lower sides, it is possible to reliably hold the cup. 
     In addition, since the characters or symbols printed on the outer wall of the cup sleeve are represented at a predetermined temperature, it is possible to allow the consumer to predict the temperature of the coffee when he or she grips the sleeve holding the cup, thereby preventing the consumer from scalding. 
     Although preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.