Patent Publication Number: US-2010108752-A1

Title: quick open envelope

Description:
FIELD OF THE INVENTION 
     The present invention is one envelope, not the least of which is an easily-opened envelope. 
     BACKGROUND OF THE INVENTION 
     As shown in  FIG. 1 , one well-known envelope  1  with its cover  11  developing one tearing line  12  which defines one zipper-pattern splinter  13  equipped with one puller  131  for a user opening the envelope  1  by applying force to remove the splinter  13  from the envelope  1 . Using two auxiliary tearing lines  14  which extend to both laterals of the envelope  1  from two reversed directions of the tearing line  12 , a letter receiver after removing the splinter  13  can open the envelope  1  along auxiliary tearing lines  14  to develop a larger opening in favor of this receiver taking letters held inside the envelope  1 . Still, a receiver has a two-stage action to tear the tearing line  12  as well as auxiliary lines  14  sequentially for development of one larger opening on the envelope  1  that is not an ideal model in use. 
     SUMMARY OF THE INVENTION 
     Against this background, the present invention aims to supply one easily-sealed quick open envelope without articles which are held inside damaged. 
     As a result, this new quick open envelope comprises one polygonal hollow envelope body and one flap wherein the former owns one surface, and one opening edge as well as plural seal edges to form the surface&#39;s boundaries, and the latter connected to the envelope body is used for sealing the opening edge. One tearing line designed on the surface has both ends linking edges of an identical seal or different seals. When this tearing line is torn down, an area surrounded by the tearing line will be lifted. 
     The effect of the present invention is to form the envelope body&#39;s opening which a letter receiver can take articles held inside the envelope by using one tearing line designed on the envelope body&#39;s surface wherein the tearing line is linked to edges of the envelope body&#39;s identical seal or different seals and an area surrounded by this tearing line will be lifted when the tearing line is torn down. 
     With the following detailed descriptions and attached figures, advantages and essences correlated with this invention can be further realized. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a lateral view indicating a well-known envelope; 
         FIG. 2  is a top view interpreting one first preferred embodiment of this invention; 
         FIG. 3  is a bottom view interpreting the first preferred embodiment; 
         FIG. 4  is a stretched-out view interpreting the first preferred embodiment before assembly; and 
         FIG. 5  is one view similar to  FIG. 3  and interpreting one second preferred embodiment of this invention of a new quick open envelope. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Correlated with the present invention, the technical contents, properties, and effects, previously-mentioned or unmentioned, will be completely described with two preferred embodiments clearly shown in the following diagrams. 
     The present invention of one quick open envelope is not restricted in one letter envelope but applied to one document envelope (or bag), western-style, Chinese-style, big or small. Refer to  FIG. 2  and  FIG. 3  with one letter envelope as an example. One envelope  3  comprises one polygonal hollow envelope body  4  and one flap  5 . The envelope body  4  used for holding documents such as letters has two surfaces  41  and  42 , two opening edges  43  and  44 , and three seal edges  45 ,  46 , and  47 . The opening edge  43  and three seal edges  45 ,  46 , and  47  collectively constitute boundaries of the surface  41 ; the opening edge  44  and three seal edges  45 ,  46 , and  47  collectively constitute boundaries of the surface  42 . With one flap  5  linked to the envelope body  4 , two opening edges  43  and  44  can be sealed. One window  48  designed on the surface  41  is used for exposing some words written on one letter, for instance, a receiver&#39;s address, name, etc. for convenient reading. 
     One tearing line  61  prepared on the surface  41  has both ends connected to the identical seal edge  45 . When the tearing line  61  is torn down, an area on the surface  41  surrounded by the tearing line  61  can be lifted. Another tearing line  62  prepared on the surface  42  has both ends connected to the identical seal edge  46 . When the tearing line  62  is torn down, an area on the surface  42  surrounded by the tearing line  62  can be also lifted. 
     Two curve-shaped tearing lines  61  and  62  have different curve sizes because two tearing lines  61  and  62  are designed to match widths and lengths of general letters held inside the envelope  3  and folded to become a rectangular shape. When one of two tearing lines is torn down by a receiver, an area surrounded by this tearing line can be lifted to develop one proper-size opening on the envelope body  4  from which a receiver is able to take unfolded letters. 
     Refer to  FIG. 4  showing the envelope  3  fabricated with one single paper cut to separate different areas such as one central piece  71 , three lateral pieces  72 ,  73 , and  74 , and one flap  5  along four folding lines wherein the flap  5  and three lateral pieces  72 ,  73 , and  74  connected to the central piece  71  are separated from the central piece  71  with folding lines, and the central piece  71  is equipped with one window  48  and one tearing line  61 . Another tearing line  62  is designed at another edge of the lateral piece  72  connected to the central piece  71 . When three lateral pieces  72 ,  73 , and  74  are folded at one edge of the central piece  71  to make the lateral piece  72  stacked over lateral pieces  73  and  74 , their overlapped areas stuck with adhesive can develop one envelope body  4  with two surfaces  41  and  42 . Simultaneously, the flap  5  is also folded over the surface  42  along another folding line to develop the envelope  3 . Fabricated with one method similar to the method manufacturing one traditional envelope generally, the envelope  3  has a different design with two tearing lines  61  and  62  printed on surfaces  41  and  42  through a simple processing step to reach an effect of easily opening one envelope. 
     In this embodiment with both ends of the tearing line  61  connected to the identical side edge  45  and both ends of the tearing line  62  connected to the identical side edge  46 , a practical application is not limited in this case but one tearing line&#39;s both ends are designed to link different seal edges. Furthermore, a tearing line can be prepared on one of two surfaces  41  and  42  only, or plural tearing lines are designed on one identical surface. In addition, instead of one window  48  opened on the surface  41  in this embodiment, the envelope  3  can be designed to another style without the window  48 . 
     Refer to  FIG. 5  for the second preferred embodiment of this new quick open envelope. Having a whole structure similar to the first preferred embodiment in general, the second preferred embodiment has a difference with one broken line designed for the tearing line  62  on the surface  42  or another tearing line design with another shape such as polygon without being restricted in the case exposed in this embodiment. 
     According to descriptions mentioned above for one tearing line designed on a envelope body&#39;s surface and with both ends linked to one identical seal edge or different seal edges, an area surrounded by the tearing line torn down by one receiver can be lifted to develop one opening from which a letter receiver is able to take articles held inside one easily-opened envelope with all articles kept completely during unsealing and the objective of this invention substantially materialized. 
     Although the present invention is disclosed through a better embodiment as above, yet it is not used to limit the present invention, anyone that is familiar with this art, without deviating the spirit and scope of the present invention, can make any kinds of change, revision and finishing; therefore, the protection scope of the present invention should be based on the scope as defined by the following attached “what is claimed”.