fig1 shows my counter display 1 in folded form , as it would be when being shipped . fig2 and 3 show it set up in its narrow form and in its expanded form , respectively . counter display 1 includes a base 3 and two hinged back sections 5 . base 3 is formed of a central member 7 , running fore and aft , having spaced fingers 9 extending laterally out each side , and two end pieces 11 , one on each side of the central member 7 , the end pieces each having spaced fingers 13 extending laterally toward the central member 7 . an end cap 17 may be positioned on the front edge of central member 7 for displaying price or other information . all parts can be molded of any suitable plastic material . fingers 9 are dimensioned to interfit in the spaces between fingers 13 , and fingers 13 are dimensioned to interfit in the spaces between fingers 9 . the fingers and the spaces between them are complementary to one another . this interfitting is best seen in fig4 and 8 to 10 . where they interfit , the two sets of fingers can , if desired , provide a substantially continuous upper surface . this surface is used to hold goods for display . alternatively , the fingers may be present only adjacent the front and back of the base , to provide structural integrity for the base , with gaps 22 in the middle . preferably , all of the fingers have a cross - section made up of a base 15 and an upper &# 34 ; cantilevered &# 34 ; shelf 16 , having what i call a z - shaped cross - section . this cantilevering results in the shelf of one finger projecting over a portion of the base of an adjacent finger . this gives the unit more integrity , with no vertical slot between fingers that runs from the top to the bottom of the fingers . it also prevents the fingers 9 from getting out of parallelism with fingers 13 which would be undesirable because this could result in an uneven surface . in fig2 the fingers 13 of the end pieces 11 have been interfitted with fingers 9 of the central member 7 to the maximum extent , that is , end pieces 11 and fingers 13 have been pressed inwardly toward central member 7 as far as they can go . this provides the minimum width counter display 1 and also provides the most uniform upper surface 21 . backs 5 are close together , so they can hold a commensurately narrow display card 25 in card holder 23 . in fig3 by contrast , fingers 13 have not been interfitted as much , resulting in a wider counter display . as can be seen , backs 5 are more removed from one another , allowing for a display card 25 of similarly greater width . the counter display can , of course , be given any width intermediate the narrowest width of fig2 and the widest width of fig3 by suitable adjustment . the display cards have several lugs 26 extending from their side edges . these lugs fit within slots 24 in card holders 23 to hold the display cards in position . to the extent that the fingers are not all the way interfitted ( i . e ., in the wider versions ), there will be gaps in surface 21 representing the spaces between adjacent fingers 9 near the central member7 and the spaces between adjacent fingers 13 adjacent the end pieces 11 of the counter display . accordingly , unless the goods are held on a merchandise holder 27 , the shelves 16 of the fingers 9 and 13 should be dimensioned with a width ( transverse of their longitudinal direction ) such that the gaps are not objectionably wide . they should be narrower than the narrowest dimension of any items to be displayed . i have found that one satisfactory dimension is to have the width of the fingers 16 about 0 . 100 inch ± 0 . 005 inch . the bases 15 of the fingers should have the same width , with the shelves cantilevered out from the bases for about half of their width . to allow for axial movement of both sets of fingers relative to one another , adjacent fingers 9 should be separated from one another by slightly more than their widths , approximately 0 . 009 inch more . the spacing of fingers 13 should be similar . the side surfaces of each of the fingers may be angled slightly , about 5 degrees ( see fig9 ), to provide additional clearance . this dimensioning will provide structural integrity between the central member 7 and the end pieces 11 . accordingly , the same counter display 1 can be used in different widths at different times , depending upon the items to be displayed and the dealer &# 39 ; s desires . goods can be carried by the display itself or on a merchandise holder 27 , which may have separate openings or compartments 28 for the goods . if the display has been designed with gaps 22 , a tray should be used . backs 5 are hinged on hinge mounts 19 at the back of end pieces 11 , one to each end piece . these hinges are used to fold the display for shipping or storage , but are designed to lock the back sections 5 in their upright , vertical position when the counter display is assembled for use . the structure of the hinges is best seen in fig4 , 10 , and 11 . two hinge mounts 19 are molded along the back edges of end sections 11 . two complementary hinge brackets 31 are formed at the back of each back section 5 toward the bottom , brackets 31 each carrying a hinge pin 33 to fit within an opening 32 on each hinge mount 19 . pins 33 face away from each other and opening 32 face each other so that the pins 33 will be held in place in openings 32 . this structure permits the back to swing from its shipping and storage position ( fig1 ) to its assembled position ( fig2 and 3 ). a spring - pressed locking arm 35 , with a locking detent 37 at its lower end , extends downwardly at the lower end of back section 5 . it is positioned such that detent locks with shoulder 39 on the back of end section 11 . thus , when the back is moved from its folded position under the end section to its upright , vertical position , locking detent 37 will engage with shoulder 39 and hold the back in position . when it is desired to fold the stand , detent 37 can , of course , be released by applying disengaging pressure to it . different positions of hinge 29 can be seen in dotted outline in fig1 . alternatively , the locking detent can be on the end piece and the complementary shoulder on the back . if desired , my counter display can be made using only two end pieces 11 with the fingers 13 of the two sections being so dimensioned and spaced as to be able to interengage in a manner similar to the interengagement of fingers 9 and 13 . fig1 to 20 show a modification of my invention in which the base is used as a shelf extender for store displays . only the base 3 is used , since it is unnecessary to have backs 5 . the base has a structure like that in the previously - described unit for changing its width , including a central member 7 and end pieces 11 , the same type of interengaging fingers , and preferably no gap 22 . in this instance the fingers are used to vary the width of the display , so that it will be the same width as the depth of the shelf end to which it is attached . however , it does not have any of the hinge structure , but has an extension 49 extending outwardly from the back of the central section 7 . this extension is bolted with bolts 51 to a u - shaped mounting bracket 45 , which in turn fits about a shelf 43 and is held in place with thumb screw 47 .
an expandable display including a central member and two end pieces , the central member including fingers extending laterally from each side , the end pieces each having fingers extending laterally towards the central member , the fingers of the end pieces slidingly engaging the fingers of the central member , permitting the width of the display to be varied by relative sliding movement between the central member fingers and the end piece fingers . each of the end pieces may include a hinged back for receiving and holding a display card . the central member may include a clamp at the rear for securing the display to another structure .