Abstract:
A tape body having an adhesive layer includes a tape center to be affixed to an object and a tape outer periphery continuous to an outer periphery of the tape center and separable therefrom. A release paper includes a release paper center laminated on the tape center except at the outer periphery of the tape center, and a release paper outer periphery at least partially continuous to an outer periphery of the release paper center and separable therefrom. Thus, when the release paper center is separated from the tape center, opposite ends of the tape center adhere to the release paper outer periphery. Therefore, after a part of the tape center is affixed to the object, the tape outer periphery and the release paper outer periphery are separated from the tape center, and the remaining parts of the tape center are affixed to the object, thereby completing the adhesion operation.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present invention claims priority under 35 USC 119 based on Japanese patent application No. 2006-146309, filed on May 26, 2006. The entirety of the subject matter of this priority document is incorporated by reference herein. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an adhesive tape comprising a tape body having an adhesive layer on one side, and a release paper for protecting the adhesive layer of the tape body, the release paper being laminated on the tape body. 
     2. Description of the Related Art 
     Japanese Patent Application Laid-open No. 5-92022 discloses an adhesive plaster comprising a large number of adhesive plaster bodies arranged on a band-shaped (elongate rectangular shaped) release paper (separation paper) at predetermined intervals, the release paper being longitudinally bisected by a cut (slit) in order to facilitate removal of each adhesive plaster body. The one half of the release paper is removed from an adhesive layer of the adhesive plaster, the adhesive plaster body is pinched at a portion on the side where the adhesive layer is exposed, and the adhesive plaster body is peeled off from the other half of the release paper. 
     However, in this conventional art, a user is required to pinch the adhesive layer of the adhesive plaster body when removing the adhesive plaster body remaining on the other half of the release paper, leading to a possibility that the adhesive layer is stained and its adhesion ability is reduced. 
     SUMMARY OF THE INVENTION 
     The present invention has been achieved in view of the above circumstances, and has as an object to provide an adhesive tape where adhesion work can be performed without an adhesive layer of a tape being touched with fingers when a tape body is removed from a release paper and affixed to an object. 
     In order to achieve the above object, according to a first feature of the present invention, there is provided an adhesive tape comprising a tape body having an adhesive layer on one side, and a release paper for protecting the adhesive layer of the tape body. The release paper is laminated on the tape body. The tape body includes a tape center portion to be affixed to an object, and a tape outer periphery portion continuous to an outer periphery of the tape center portion so that the tape outer periphery portion can be separated therefrom. In addition, the release paper includes a release paper center portion laminated on the tape center portion except at least a part of the outer periphery of the tape center portion, and a release paper outer periphery portion at least partially continuous to an outer periphery of the release paper center portion so that the release paper center portion can be separated therefrom. 
     With this arrangement, the tape body comprises the tape center portion to be affixed to the object, and the tape outer periphery portion separatably continuous to the outer periphery of the tape center portion; and the release paper comprises the release paper center portion laminated on the tape center portion except at least a part of the outer periphery of the tape center portion, and the release paper outer periphery portion at least partially continuous to the outer periphery of the release paper center portion. Thus, even if the release paper center portion is separated from the tape center portion, the tape center portion adheres to the release paper outer periphery portion at a part of the outer periphery and is retained integrally with the release paper outer periphery portion. Therefore, after a part of the tape center portion, whose adhesive layer is exposed at such a part, is affixed to the object while holding the tape outer periphery portion and the release paper outer periphery portion with fingers, then the tape outer periphery portion and the release paper outer periphery portion are separated from the tape center portion, and a part of the outer periphery of the tape center portion is affixed to the object, thereby completing the adhesion operation. In this process, since there is no need to touch the adhesive layer of the tape center portion with fingers, formation of a stain on the adhesive layer is prevented and its adhesion ability is improved. Moreover, clean finishing of the adhered portion is ensured. 
     According to a second feature of the present invention, in addition to the first feature, the release paper center portion and the release paper outer periphery portion are partially continuous along a perforated line. 
     With this arrangement, since the release paper center portion and the release paper outer periphery portion are partially continuous to each other via the perforated line, the adhesion work of the tape center portion is facilitated by folding the release paper center portion, separated from the tape center portion, along the perforated line. Moreover, since the release paper center portion and the release paper outer periphery portion are connected by the perforated line after removal from the tape center portion, the number of waste pieces including the release papers to be disposed is reduced. 
     According to a third feature of the present invention, in addition to the second feature, a slit formed between the tape center portion and the tape outer periphery portion is displaced from the perforated line formed between the release paper center portion and the release paper outer periphery portion, and the tape center portion is covered by the release paper outer periphery portion between the slit and the perforated line. 
     With this arrangement, the slit on the tape body and the perforated line on the release paper are displaced from each other so that the tape center portion is covered by the release paper outer periphery portion between the slit and the perforated line, whereby the tape center portion is reliably retained on the release paper. 
     According to a fourth feature of the present invention, in addition to the first feature, when the release paper center portion is separated from the tape so as to expose a part of the tape center portion, pinch portions where the tape outer periphery portion and the release paper outer periphery portion remain laminated are formed on opposite sides of the tape center portion. 
     With this arrangement, when the release paper center portion is separated from the tape body to expose a part of the tape center portion, the pinch portions are formed on the opposite sides of the tape center portion where the tape outer periphery portion and the release paper outer periphery portion remain laminated. Thus, the tape center portion can be easily affixed to the object by holding the pinch portions. 
     According to a fifth feature of the present invention, in addition to the first feature, each pinch portion has an L-shape. 
     With this arrangement, the pinch portions in the tape and the release paper are in the L-shape, such that the pinch portions are easily held. 
     According to a sixth feature of the present invention, in addition to the first feature, the tape center portion has a silhouette corresponding to a silhouette of the object. 
     With this arrangement, since the tape center portion is provided with the outline corresponding to the outline of the object, the tape center portion can be affixed at an appropriate position by positioning the outline of the tape center portion along the outline of the object. 
     According to a seventh feature of the present invention, in addition to the first feature, the tape center portion has a band (elongate, substantially rectangular) shape. 
     With this arrangement, even if the tape center portion has the band-shape and is easy to be twisted upon adhesion, the tape center portion can be appropriately affixed. 
     A side sill S of a vehicle body in embodiments described below corresponds to the object in the present invention. 
     The above-mentioned object, other objects, characteristics, and advantages of the present invention will become apparent from a preferred embodiment, which will be described in detail below by reference to the attached drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of an automobile showing a chipping prevention adhesive tape according to a first embodiment of the present invention, in which the chipping prevention adhesive tape is affixed to a side sill of the automobile. 
         FIG. 2A  is a perspective view of the adhesive tape. 
         FIG. 2B  is an exploded perspective view of the adhesive tape. 
         FIG. 3  is a plan view of the adhesive tape as seen in the direction of an arrow  3  in  FIG. 2A , including three enlarged, sectional views of portions of the adhesive tape. 
         FIGS. 4A and 4B  are views showing a first step of affixing process of the adhesive tape. 
         FIG. 5  is a sectional view of the adhesive tape taken along a line  5 - 5  in  FIG. 4B . 
         FIGS. 6A and 6B  are views showing a second step of the affixing process of the adhesive tape. 
         FIG. 7A  is a diagram illustrating an adhesive tape according to a second embodiment of the present invention. 
         FIG. 7B  is a diagram illustrating an adhesive tape according to a third embodiment of the present invention. 
         FIG. 7C  is a diagram illustrating an adhesive tape according to a fourth embodiment of the present invention. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     A first embodiment of the present invention will be described below with reference to  FIGS. 1 to 6B . 
     As shown in  FIG. 1 , a tape (a tape center portion  11   a  which will be described later) is affixed to a side face of a side sill S of an automobile in order to prevent damage to a painted surface by a stone or the like hitting thereon after being splashed up by a front wheel. 
     As shown in  FIGS. 2A ,  2 B and  3 , an adhesive tape T including the tape center portion  11   a  comprises a tape body  11  made of a synthetic resin on which an adhesive layer  13  is formed on one side, and a release paper  12  of the same dimension laminated on the tape body  11  so as to protect the adhesive layer  13  of the tape body  11 . The release paper  12  is subjected to a surface treatment so that the adhesive layer  13  of the tape body  11  is difficult to adhere to the release paper  12 . Therefore, the tape body  11  lightly adheres to the release paper  12  so that although they are joined to each other, the release paper  12  can be easily separated from the tape body  11 . 
     The tape body  11  is divided into the tape center portion  11   a  and a tape outer periphery portion  11   b  by slits a, b, c which form a U-shape. In use, the tape center portion  11   a  is affixed to the side sill S, while the tape outer periphery portion  11   b  is eventually disposed of along with the release paper  12 . The release paper  12  is divided into a release paper center portion  12   a  and a release paper outer periphery portion  12   b  by two slits d, e and a single perforated line f which generally form a U-shape. During application of the tape T to an object such as the sill S, the release paper center portion  12   a  is separated from the tape center portion  11   a  in an initial part of the application process, but the release paper outer periphery portion  12   b  is not separated from the tape outer periphery portion  11   b  until the end. 
     The slit a of the tape body  11  lies parallel to a side edge  14  of the tape body  11 , and the slits b, c, provided at opposed ends of the slit a, extend between the side edge  14  and the slit a. Similarly, the slit d of the release paper  12  lies parallel to a side edge  15  of the release paper  12 , and the slits e, f, provided at opposed ends of the slit d, extend between the side edge  15  and the slit d. The slit a of the tape body  11  is positioned so as to overlap the slit d of the release paper  12 , but the slits b, c of the tape body  11  are located outside the slit e and the perforated line f of the release paper  12  relative to a center of the tape body  11 . Therefore, the tape center portion  11   a  is larger than the release paper center portion  12   a  by two parts shown by shadows in  FIG. 3 . The slits a to e completely cut the tape body  11  or the release paper  12 . In addition, the release paper  12  folds easily along the perforated line f. 
     Next, the operation of the first embodiment of the present invention having the above arrangement will be described. 
     First, as shown in  FIG. 4A , when the adhesive tape T is bent in the vicinity of the slits b, e so as to curve to the tape body  11  side (see an arrow A 1 ), the release paper center portion  12   a  is separated from the release paper outer periphery portion  12   b  along the slit e and floated from the tape center portion  11   a . Thus, grasping and pulling the floated portion (see an arrow A 2 ) easily separates the release paper center portion  12   a  from the tape body  11  along the slit d, whereby the tape center portion  11   a  is exposed. 
     At this time, since the release paper center portion  12   a  is slightly smaller than the tape center portion  11   a , the opposite ends of the tape center portion  11   a  in the longitudinal direction are still covered by the release paper outer periphery portion  12   b . At this covered portion, the tape center portion  11   a  adheres to the release paper outer periphery portion  12   b , and thus the tape center portion  11   a  is prevented from being removed from the release paper  12 . Since the release paper center portion  12   a  is connected to the release paper outer periphery portion  12   b  by the perforated line f, the release paper center portion  12   a  can be folded along the perforated line f. As a result, the release paper center portion  12   a  is folded back over, and superposed on the release paper outer periphery portion  12   b . Also, since the release paper center portion  12   a  and the release paper outer periphery portion  12   b  are connected by the perforated line f and not separated, the number of waste pieces is not increased when the release paper  12  is disposed of after completion of the adhesion operation. 
     Subsequently, as shown in  FIGS. 4B and 5 , the opposite ends of the adhesive tape T, that is, at portions where the tape outer periphery portion  11   b  and the release paper outer periphery portion  12   b  are laminated, in other words, a pair of L-shaped left and right pinch portions  16 ,  17  are held by the hands, and the tape center portion  11   a  is positioned at a predetermined position of the side sill S and affixed thereto. In this process, since there is no need to touch the adhesive layer  13  of the tape center portion  11   a  with fingers, adhesion of dust or fingerprints to the adhesive layer  13  is prevented, whereby an excellent finish is obtained, and moreover, the outline of the tape center portion  11   a  is aligned with the outline of the side sill S to improve workability and facilitate positioning of the tape center portion  11   a  on the side sill S. 
     Even when the tape center portion  11   a  is affixed to the side sill S as described above, the opposite ends of the tape center portion  11   a  remain covered by the release paper outer periphery portion  12   b , and are still not affixed to the side sill S. Then, as shown in  FIG. 6A , if the ends on the slits b, e sides of the adhesive tape T are pulled in the direction away from the side sill S (see an arrow A 3 ), one end of the tape center portion  11   a  not yet affixed to the side sill S is separated from the release paper outer periphery portion  12   b . Further as shown in  FIG. 6B , the other end of the tape center portion  11   a , not yet affixed to the side sill S, is separated from the release paper outer periphery portion  12   b , whereby the tape outer periphery portion  11   b  and the release paper  12  are completely separated from the tape center portion  11   a , a part of which is affixed to the side sill S. 
     Finally, pressing and affixing the opposite ends of the tape center portion  11   a  to the side sill S complete the adhesion operation of the tape center portion  11   a . Since the tape outer periphery portion  11   b  and the release paper  12 , separated from the tape center portion  11   a , are still integral, the number of waste pieces is minimized. 
     Particularly, the band-shaped elongated tape body  11  is easily twisted upon adhesion, but according to this embodiment, the tape body  11  can be affixed at an appropriate position with a good appearance while preventing twisting. 
     As described above, even when the release paper center portion  12   a  is separated from the tape center portion  11   a , the adhesive layer  13  of the tape center portion  11   a  is not totally exposed, because the release paper center portion  12   a  is formed to be slightly smaller than the tape center portion  11   a . The adhesive layer  13  is adhered to the release paper outer periphery portion  12   b  at the opposite ends of the tape center portion  11   a , so that the tape center portion  11   a  is retained on the release paper  12 . Therefore, the adhesion operation of the tape center portion  11   a  can be performed by grasping the opposite ends of the adhesive tape T, thereby eliminating the need to touch the adhesive layer  13  of the exposed tape center portion  11   a . Thus, it is possible to prevent stains on the adhesive layer  13  so as to improve adhesion ability and provide excellent finishing of the adhered portion. 
     Next, other embodiments of the present invention will be described referring to  FIGS. 7A to 7C . 
     In a second embodiment shown in  FIG. 7A , the slit c of the tape body  11  is repositioned so as to overlie the perforated line f of the release paper  12 , which remains in its previous position. Even with this arrangement, there is no fear that the tape center portion  11   a  drops off when the release paper center portion  12   a  is separated from the tape center portion  11   a , because one end of the tape center portion  11   a  is affixed to the release paper outer periphery portion  12   b  (see the shaded portion). 
     In the first and second embodiments, the tape center portion  11   a  is formed along the upper edge of the tape body  11 , but in a third embodiment shown in  FIG. 7B , the tape center portion  11   a  is spaced apart from the peripheral edges of the tape body  11  and is formed entirely inside the peripheral edges. Also, in a fourth embodiment shown in  FIG. 7C , the tape center portion  11   a  has semi-spherical shaped opposite ends formed by rounding the opposite ends of the rectangular-shaped tape center portion  11   a  of the third embodiment. Also the third and the fourth embodiments provide the same effects as those of the first and the second embodiments. 
     The embodiments of the present invention have been described above, but various changes in design may be made without departing from the subject matter of the present invention. 
     The side sill S of an automobile is illustrated, for example, as the object in the embodiments, but the adhesive tape T of the present invention may be applied to any object. 
     Also, the adhesive tape T in the embodiments is used for prevention of chipping, but the adhesive tape T may be applied for any purpose. 
     Also, in the embodiments, the release paper center portion  12   a  of the release paper  12  and a part of the release paper outer periphery portion  12   b  are connected by the perforated line f, but the perforated line f portion may be completely cut to provide a slit such as the slit d or e. 
     Also, the material of the tape body  11  is not limited to a synthetic resin, and the material of the release paper  12  is not limited to paper in a narrow sense and encompasses a synthetic resin and the like.