Abstract:
A pocket for holding media is disclosed, comprising two sheets of clear archival material fused on three sides to form a pocket and including attachment means, such as a coating of adhesive, to attach the holder to a book or other media.

Description:
FIELD OF THE INVENTION  
         [0001]    This invention relates to media which are cataloged, for example by a library, and therefore require a pocket to hold a card containing cataloging information. For example, books, tapes and compact discs lent out by libraries typically contain a pocket in which a card can be maintained with cataloging information such as the book or disc&#39;s due date.  
         BACKGROUND OF THE INVENTION  
         [0002]    Prior art pockets, such as those disclosed in U.S. Pat. No. 6,129,387 to Chess and U.S. Pat. No. 5,318,324 to Lombardo, are made of paper or paper-like material. As a result, one cannot see through the pocket to view information that is recorded on the card or, if no card is in the pocket, one cannot see through the pocket to view information or images recorded on the surface to which the card is attached. In the case of music compact disks, a great deal of information is typically visible on the compact disc case, some or all of which would be obscured by an opaque pocket.  
           [0003]    Further, such pockets experience substantial stress at the corners where the front panel and rear panel join, mostly from insertion and removal of the cataloging card. The prior art methods of reinforcing stress points on such a pocket include using heavier paper stock or folding the paper at a stress point to create a double sheet. In either case, the reinforcement causes the paper pocket to become thicker and more bulky.  
           [0004]    In addition, the pockets disclosed in Chess and Lombardo require preparation and folding before they are ready for use in a book or on other media. Specifically, such pockets require selective removal of strips to expose adhesive, folding the intermediates into a suitable pocket shape and applying the formed pocket to the book or other media. The folding of such pockets increases the bulk of the pockets, causing them to fit poorly in some books. In addition, the necessity of folding and preparing the pockets for use makes them inconvenient to use.  
           [0005]    Other prior art pockets, such as those disclosed in U.S. Pat. Nos. 3,592,381 and 3,372,858, both to Brody, adhere to the book or other media over only a portion of their back surface and use the media surface to form one portion of the pocket. As a result, such pockets are not securely attached to the book or other media. In addition, because the adhesive that is used to form the sides of such a pocket is also the adhesive that attaches the pocket to the book, it is possible for a card contained in such a pocket to contact the adhesive, thereby marring the card and weakening the adhesive.  
           [0006]    What is needed is a pocket that is made of clear, archival material and that is thin, durable and easily mounted to a wide variety of cataloged media.  
         SUMMARY OF THE INVENTION  
         [0007]    It is an object of the present invention to provide a pocket for cataloging various media that is made of clear material.  
           [0008]    It is a further object of the present invention to provide a pocket for cataloging various media that is made of archival material.  
           [0009]    It is yet another object of the present invention to provide a pocket for cataloging various media that is thin and durable.  
           [0010]    Finally, it is another object of the present invention to provide a pocket that is easily mounted to a wide variety of cataloged media.  
           [0011]    These and other objectives are accomplished by a pocket formed from two sheets of clear, archival material, such as sheets of polypropylene. Such a pocket comprises two sheets of such material, substantially similar in size and shape, except that preferably, the top sheet is shorter in its vertical dimension than the bottom sheet. The two sheets are fused together along their coextensive bottom edges and the co-extensive portion of their side edges, preferably using sonic welding techniques. The bottom sheet has on its back surface a coating of adhesive, preferably temporarily repositionable adhesive. Finally, the adhesive is covered by a releasable sheet of coated paper or similar material that allows the pocket to be handled without exposing the adhesive. Prior to affixing the pocket to the book or other media, the releasable sheet is removed to expose the adhesive and is then discarded. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0012]    [0012]FIG. 1 is a view of a typical prior art pocket.  
         [0013]    [0013]FIG. 2 is an exploded view of one embodiment of the present invention.  
         [0014]    [0014]FIG. 3 is an oblique view of the preferred embodiment of the present invention.  
         [0015]    [0015]FIG. 4 is an exploded side view of the preferred embodiment of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0016]    Shown at FIG. 1 is a typical pocket  10  used to store a cataloging card  11  in a book or on other media in a library or similar institution. Such a pocket  10  is typically placed on an inner surface of a book or on an exterior surface of a compact disc case, record album or other media case. A typical pocket  10  is made of paper and is therefore opaque. If there is indicia or an image on the surface to which the card  11  is attached, the indicia or image is obscured when the pocket  10  is placed over it. Further, also as shown at FIG. 1, indicia on the lower portion of the card  11  are obscured by the lower front portion of the pocket  10 , one must remove the card  11  from the pocket  10  to view data on the lower part of the card, or to confirm that no data has been entered on the lower part of the card.  
         [0017]    A pocket  20  according to the present invention is comprised of a first sheet of clear material  21  and a second sheet of clear material  25 . In the preferred embodiment, the sheets  21  and  25  are made of polypropylene, preferably 2.5 mils in thickness; however, polypropylene in the range of 2 to 5 mils is acceptable. Polypropylene is the preferred material for the sheets. Polypropylene is archival, meaning that it is stable and non-acidic and, as a result, it does not cause the deterioration of paper or other materials with which it comes in contact. Polypropylene is also clear and, unlike vinyl, does not become yellow as it ages. In addition to polypropylene, other clear, archival and non-yellowing plastic materials are also acceptable.  
         [0018]    In the preferred embodiment, the sheets  21  and  25  are substantially rectangular in shape. Each sheet  21  and  25  has a top edge  22 ,  26 , a bottom edge  23 ,  27  and two side edges  24 ,  28 . However, the size and shape of the sheets  21  and  25  can be adapted depending on the needs of a particular application. For example, to hold a library card dimensioned 3″ by 5″, rectangular sheets of approximately 3.5″ by 5.25″ would be desirable.  
         [0019]    Preferably, the first sheet bottom edge  23  and the second sheet bottom edge  27  are the same length and are positioned such that they are co-extensive along their entire respective lengths. In the preferred embodiment, the side edges  28  of the second sheet  25  are approximately 80% of the length of the side edges  24  of the first sheet  22 . The side edges  28  of the second sheet  25  are co-extensive along their entire length with the side edges  24  of the first sheet  21 . The first sheet top edge  22  is the same length as the second sheet top edge  26 . The first sheet top edge  22  is parallel to the second sheet top edge  26 , but the respective top edges  22  and  26  are not co-extensive.  
         [0020]    The first sheet  21  has a front surface  21   a  and a back surface  21   b . The back surface  21   b  has means for attaching the pocket to the book or other media. In the preferred embodiment, the attachment means is adhesive  29  to allow the pocket  20  to be affixed to a book or other media. Other means such as static attraction, mechanical attachment, such as by stapling, or cohesive may be substituted for adhesive. The adhesive  29  may be permanent or repositionable. In the preferred embodiment the adhesive  29  is a temporarily repositionable adhesive, such that the pocket  20  can be repositioned for only approximately 5 minutes after it is first affixed to the book or other media. The adhesive  29  may cover some or all of the back surface  21   b . As is known to those skilled in the art, the amount of adhesive  29  must be sufficient to securely attach the pocket  20  to a book or other media. In the preferred embodiment, the adhesive  29  covers all of the back surface  21   b . A covering  30  comprised of coated paper or similar material known to those skilled in the art is co-extensive with the back surface  21   b  of the first sheet  21  and is releasably secured by the adhesive  29  to the back surface  21   b  of the first sheet  21 . Prior to affixing the pocket  20  to a book or other media, the covering  30  is removed to expose the adhesive  29 . The covering  30  is disposable and, as is known to those skilled in the art, the covering may be perforated or cut to make it more easily removable.  
         [0021]    In the preferred embodiment, the top edge  26  of the second sheet  25  is folded in toward the front surface  21  a of the first sheet  21 , as seen in FIG. 4, a side view of the preferred embodiment. In this embodiment, the second sheet  25  is approximately 90% of the length of the first sheet  21 , and the portion of the second sheet  25  that is folded over is approximately 10% of the length of the second sheet  25 . Folding over the top edge  26  of the second sheet  25  increases the durability of the pocket  20 .  
         [0022]    The first sheet bottom edge  23  and second sheet bottom edge  27  are fused together. In addition, the second sheet side edges  28  are fused to the first sheet side edges  24 . Preferably, the edges are fused together using ultrasonic welding; however, other acceptable techniques will be known by those skilled in the art.