Self-adjusting storage rack
BACKGROUND OF THE INVENTION 
     (a) Field of Invention 
     The present invention relates to a self-adjusting storage rack for holding in position stationery, envelopes, letters, file folders, cards, photos, magazines and similar flat articles. 
     (b) Description of Prior Art 
     U.S. Pat. No. 3,844,415 describes an adjustable rack without any separate supports between the articles so that the articles are placed together. U.S. Pat. No. 4,801,022 describes a rack that&#39;s not extendable and is of a fixed size; and within the limits of said rack, the vertical supports are not self-adjusting. The lower support rod for mail or similar articles requires a hole to be punched through the article, large enough to slide the article on a rod. Said rod must be pulled out on one side to slide punctured mail, etc. onto it. 
     My invention accepts all previously mentioned articles between the self-adjusting elastic supports, either individually or collectively. Such articles are easily inserted and removed. The rack itself may be manually lengthened to twice its size or any convenient size between the end-plates and the elastic supports self-adjust to the new length. 
     U.S. Pat. No. 1,750,576 has a rack which is adjustable and has rigid upright supports which must be placed in slots between the end-plates, such supports are obviously not self-adjusting and, not being flexible, maintain a fixed position so space between vertical supports does not conform to the size of article inserted or removed. 
     All storage racks have rigid vertical or horizontal supports in which articles filed are placed together or, if filed separately, leaves too much wasted space between the fixed vertical supports. Where articles are filed within the same vertical uprights, it is not easy to see or select one article without removing the others. This also holds true when files are placed horizontally one on top of the other in filing racks. 
     Present adjustable racks do not have flexible, multiple self adjusting vertical uprights for individually filing the previously mentioned articles nor do the retaining uprights automatically adjust for individual files when the end-plates are extended to lengthen the rack. 
     Most storage racks or desk top organizers appear bulky and even when not in use require the same amount of desk space whereas my device is small and compact in comparison and yet can hold numerous articles, providing easy accessibility with immediate insertion and removal of individual items. 
     In order to provide background information so that the invention may be completely understood and appreciated in its proper context, reference is made to a number of prior art patents and publications as follows; 
     
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U.S. PATENT DOCUMENTS                                                     
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1682060       8/1928   Banks 211/43                                       
1739545       12/1929  Cubberley 211/51X                                  
1750576       3/1930   Cubberley 211/43X                                  
1772438       8/1930   Cubberley 211/11                                   
3425565       2/1969   Sprenger 211/43                                    
3844415       10/1974  Heimann 211/43                                     
3850303       11/1974  Franklin 211/43                                    
4801022       1/1989   Colby 211/11                                       
5121681       6/1992   Chang 211/42                                       
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     SUMMARY OF THE INVENTION 
     Object of this invention is to get away from the rigid fixed vertical supports of present storage racks or desk organizers. 
     Another object is to have an efficient, simpler and compact storage rack or desk organizer. 
     Another object is to have such flexibility and adaptability in vertical supports to allow easy individual insertion and removal of flat surface articles such as mail, filing cards, folders, etc. 
     Another object of this invention is to allow even multiple insertions between the elastic upright supports which will adapt to width of the article inserted, leaving no wasted space between supports. 
     Another object is to have an easily extendable storage rack with a self adjusting vertical support area that can hold numerous articles either singularly or collectively. 
     According to the above objects, the present invention provides a storage or desk organizer for incoming or out going mail, filing folders, reference cards, photos and any article of substantially two-dimensional shape. The elastic supports require no individual adjustment and will readily adapt to the size of article or articles inserted, leaving no unused space between such articles. The rack itself may be easily extended to double its size or any convenient size in between. 
     Other and further objects, advantages and features of the present invention will be understood by reference to the following specifications in conjunction with the annexed drawings wherein like parts have been given like numbers: 
     10 COIL 
     11 END-PLATE 
     12 PUNCH-OUT TAB 
     13 FEMALE FLAT TUBULAR ROD 
     14 MALE FLAT TUBULAR ROD 
     15 TOP FLAT SOLID SLIDING ROD 
     16 BOTTOM FLAT SOLID SLIDING ROD 
     17 PUNCH-OUT TAB STOP 
     18 FLANGE 
     19 FEMALE RAIL 
     20 MALE RAIL 
     21 SIDE OF FEMALE FLAT TUBULAR ROD 
     22 SIDE OF MALE FLAT TUBULAR ROD 
     23 ENTIRE FEMALE SECTION 
     24 ENTIRE MALE SECTION 
     25 INNER RIM OF FEMALE SECTION 
     26 INNER RIM OF MALE SECTION 
     27 END COIL OF ELASTIC COILS 
     28 TUBULAR HOLDER 
     29 TUBULAR BACK FEMALE ROD 
     30 TUBULAR BACK MALE ROD 
     31 ARTICLE INSERTS 
    
    
     BRIEF DESCRIPTION OF DRAWINGS 
     In accompanying seven drawings: 
     FIG. 1 is a perspective view of self-adjusting storage rack. 
     FIG. 2 shows the exploded two sections of support frame, male and female, without the coil attached to the end-plates; 
     FIG. 3 is a perspective view of support rack, partly extended, without the coil, showing telescopic effect of male section in female section; 
     FIG. 4 is a transverse view, line 2--2 in FIG. 1, showing the coil&#39;s position in relationship to the three telescopic rods. 
     FIG. 5 shows assembled coil storage rack in use with several stored articles; 
     FIG. 6 is a prospective view of a curved adjustable storage rack partly extended; 
     FIG. 7 is a perspective view of a tilted adjustable storage rack with several articles inserted. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to FIG. 1 and FIG. 2, this device comprises three parts: the flexible, expandable, elastic coil 10 and the left and right male and female support sections, female section 11, 13 and 15, entire female section henceforth number 23, and the male section 11, 14 and 16, entire male section henceforth number 24. The female section 23 comprises a vertical end-plate 11, two outer flat tubular rods 13 and one inner top sliding flat solid rod 15. The male section 24 comprises a vertical end-plate 11, two outer flat tubular rods 14 that can be inserted into 13, completing the telescopic rod 13-14, and one inner bottom sliding flat solid rod 16 which slides beneath top sliding rod 15 to form complete center telescopic rod 15-16. Rod 16 is connected to rod 15 by its side flanges 18. Each section has a vertical plate 11 at 90 degree angle to its telescopic rods: one 15, two 13 for the female and one 16 and two 14 for the male. The coil 10 between end-plates 11 has its end coils 27 attached to inner side plate by the punch-out tabs 12. When section 24 is inserted into section 23 and said elastic coils attached to end plates, the elastic self-adjusting supports adjust themselves when the storage rack is manually expanded and shortened. 
     Referring to FIG. 4, the inner telescopic rod 15-16 runs through lower part of coil just above the bottom coils, keeping extended coil in center, preventing coil from moving upward and holding lower part of coil between the inner rims 25 and 26 when telescopic rods 13-14 are manually extended. As shown in FIG. 4, in this specific illustrative embodiment of the invention, telescopic rods 13-14, as well as telescopic rod 15-16, have flat coplanar tops which serve to support the articles in the manner shown in FIG. 5. The base female telescopic rods 13 have inner rails 19 which accept the inner male rails 20. The right angle sides of the female flat telescopic rods 21 extend downward at a 90 degree angle and are of such width as to prevent lower part of coil from touching the surface of the platform on which it is placed so coils can slide freely back and forth. 
     The assembled device is compact and suitable for placing on desk tops or any convenient flat surface. The telescopic rods even when extended will hold their position since the flexible, expandable, elastic coils 10 exert negligible tension between the end-plates 11. FIG. 3 shows the punch-out tab stops 17 on center rod 15 which will engage flanges 18 on center rod 16 and prevent sections from being pulled completely apart. 
     The coil spring 10 automatically will adjust itself to whatever length or size the device is set. The spacing between the elastic adjacent coils will hold vertically any of the aforementioned items or articles 31, such articles being easily inserted or removed and each occupying an individual space between adjacent coils. Even where numerous articles are placed between two coils, the other coils are not affected in their functioning capacity as shown in FIG. 5. 
     The simplest version of this device would be a none expandable rack comprising two end-plates, a base and the elastic coil. The device&#39;s length and the coil&#39;s diameter may be of any convenient size to place on top of a desk or any other chosen flat surface. The material of the rack may be composed of metal, plastic or wood or any suitable material. The support rack 13, 14, 15 and 16 which is straight may also be designed with a curve or arc as shown in FIG. 6. 
     Also, the base of rack may be tilted at a suitable angle by having the front perpendicular sides of 21-22 wider than the back perpendicular sides 21-22. Back side has a telescopic rod comprising a tubular back female rod 29 and a back male rod 30, the ends of which bend at a 90 degree angle to fit into the tubular holders 28 and prevent articles from sliding backward as shown in FIG. 7.