Abstract: A modular display fixture which is strong and portable, yet easy to assemble and disassemble without the use of tools. A novel securement tab for securely connecting a plurality of display fixtures together to form a multi-fixture display system is also provided. The display fixture includes a support frame including a pair of parallel, spaced-apart support posts connected by a cross member, and a planar display panel removably mounted between the spaced-apart support posts. The support frame and the removable panel include novel connecting structure which allow the display fixture to be assembled and disassembled without the use of tools.

Abstract: A wall-mounted shelving system provides for easy installation and adjustment in any number of configurations. The system includes at least one pair of vertical standards adapted to be mounted on a wall or similar supporting surface. Each standard is generally U-shaped with a backwall member adapted to be placed flush against a wall and two opposed arms extending outwardly from the backwall member. The backwall member is secured to the wall by rivets or any other suitable fastener. A ceiling mounting plate provides additional support for the standard. A plurality of keyhole slots are spaced along the pair of standard arms to receive shelf support brackets at any number of desired locations along the standard. The brackets are provided with shoulder rivets for removable engagement with the keyhole slots. The shelves are designed to snap fit over the front and back portions of the brackets to provide a secure engagement against accidental dislodgement.

Abstract: A support structure of the kind used in supermarkets and other self-service shops comprises a series of slotted upright members 12 and brackets 16 which are connected to the upright members by having teeth which enter into the slots. Conductor tracks 36 extend along passages 32 in the upright members, and electrical contact with conductors carried by the conductor tracks is established by means of electrical connectors 48 having tongues 50 which enter into the passages through slots which are unoccupied by teeth.

Abstract: An encapsulated shelf assembly has a shelf support supporting a panel. The panel has an edge and a one piece member encapsulates the panel edge and a substantial majority of the shelf support. The encapsulated shelf assembly may be formed in a mold apparatus which defines a mold cavity and uses a spacing plug to position the shelf support in a mold cavity of the mold apparatus in a location spaced from the sides of the mold cavity.

Abstract: An apparatus for constructing a gondola canopy comprising an outrigger arm with means for adjusting the length of such arm, an adapting plate attached to the outrigger arm, a fascia board removably attached to the adapting plate, means for removably attaching the adapting plate to the fascia board, and means for adjusting the height of the fascia board.

Abstract: A mobile workstation for preparation of skewered meat products comprising a mobile food preparation cart, a skewer bracket and a rack member. The cart has a work surface or horizontal supports supported by a plurality of leg supports on wheels and rails for supporting a removable seasoning lug positioned below said work surface. The skewer bracket is mounted on the food preparation cart and receives and positions a skewer in a substantially vertical position for effecting skewering of a meat product thereon. The rack member, which also supports a plurality of skewers or skewers and skewered meat products, is also mounted on the food preparation cart.

Abstract: A simplified filing system which can be mounted on a stand-alone support structure, or mounted on a support structure that attaches directly to a wall in a storage area. The filing system comprises rows of support carriages for storage with all but the bottom row capable of lateral movement via a roller assembly to permit access to lower rows of storage areas. The support carriages contain hanging files or storage baskets to store a variety of documents or other items for storage.

Abstract: An improved bracket construction for the storage and display of cylindrically and dish-shaped products in an orientation in which the top thereof is oriented generally vertically includes a pair of horizontal hanging bar units adapted to mount to the vertical standards utilized in conjunction with conventional gondola displays. The hanging bar units include a hanging bar and attachable brackets, the brackets being positionable along the length of the hanging bar and having hooks for engaging the vertical gondola standards. Vertical uprights are mounted to the hanging bars, and support at least one cradle assembly for support of the products. In a preferred embodiment, the cradle assembly includes a horizontal bar which is mounted to the vertical uprights, and at least one product cradle, extending forwardly therefrom.

Abstract: A rack system for mounting, displaying and dispensing of spooled cable, wire, chain, rope and the like including a longitudinally extending mounting bar to receive dual reel axle ends for mounting of a reel therebetween or receiving a continuous, multiple or individual axles for mounting a number of reels, at least one spring brake arranged to mount on the mounting bar to work and brake against the spooled material, an adjustable stop bar independently carried to prevent natural spring uncoiling despooling of the material from the reel and a display panel integral with the mounting bar for material identification. The rack provides a unit which allows for ease of individual reel removal, service or replacement; a compact, inherently neat and safe display area and a unit that may be free standing or wall mounted.

Abstract: A framework mounting structure is disclosed including a post made from an aluminum profile having at least one longitudinal groove through its length; a connecting frame having a hook member hooked in either of the at least one longitudinal groove, a stop member stopped against the post on the outside, and a presser member stopped against the inside surface of the longitudinal groove on which the hook member hooks; and a supporting frame adjustably connected to the connecting frame by pins for supporting a carrying board.

Abstract: A printed circuit board mounting apparatus for securing a printed circuit board within a chassis includes a track affixable to the chassis and a locking mechanism affixable to the printed circuit board. The track, which includes a plurality of locking points, is slidably received within the locking mechanism, which engages the track at any of the several locking points to secure the track within the locking mechanism. The mounting apparatus described herein enables the chassis to accommodate printed circuit boards of different sizes without mechanical modification of the chassis.

Abstract: Adjustable refrigerator shelving includes a shelf rail for supporting a partial width shelf within a refrigerated compartment on first and second, spaced shelf tracks vertically oriented in the compartment. The tracks releasably engage with a number of support brackets for cantilevered support of one or more shelves at a plurality of vertically spaced locations. The shelf rail is adapted for releasable engagement with the shelf tracks and is interposed between the partial shelf and the shelf tracks for horizontally adjustable support of the partial shelf. The shelf rail includes rearwardly projecting hooks at each of two opposing ends for releasable engagement with the shelf tracks. Locking tabs may be included on the hooks to retain the shelf rail on the tracks, while a rub strip is provided between the partial shelf and the shelf rail, along a top edge of the shelf rail.

Abstract: A utility holder for storing and carrying a plurality of tools and the like. In the preferred embodiment, the utility holder includes a frame having a plurality of compartments. Removably stored within these compartments is a plurality of drawers for receiving the tools and other articles to be stored. A jacket substantially covers, and is removable from, the frame. This jacket is configured to form a cavity for placement upon the apex of a ladder or similar structure. The exterior surface of the jacket is mateable with each of the drawers. When the jacket is placed upon the apex of a ladder or similar structure, there is minimal danger that the jacket and the tools can fall to the ground. For further safety and convenience, a plurality of tool holders are attachable to the hanging device so that individual tools may be displayed and accessed.

Abstract: Disclosed is a merchandise display rack also known as a "gondola", in which each post has a bottom and from which two flat tabs horizontally extend away in the same direction as hookable half-bases used to hold the post vertical. A retaining pin is rigidly connected to each half-base or tab is in such a manner as to engage and fit into a corresponding hole made in the corresponding tab or half-base when this half-base is rigidly connected to the post. As a result, most of the shearing force that usually applies to the lower hooks of the half-bases when the rack is loaded with merchandise onto one size only, is transferred to the tabs by the retaining pins, thereby making it possible for the rack to receive a heavier load on this one size.

Abstract: An apparatus for displaying goods in a retail environment includes a frame having sideboards, a rear board and a plurality of upright standards, each standard having a plurality of apertures spaced therealong, and a plurality of supports having knife brackets and crosswise-extending bars. Each support is affixed to two of the standards by insertion of its knife brackets into apertures of the standards and each includes forwardly-extending rails. A plurality of trays each include a plurality of location means across a width of the tray and is supported on the rails of one of the supports. The trays have first and second protrusions from their undersides, the first protrusion adapted to engage the crosswise-extending bar to support the tray in a first, retracted package-displaying position, and the second protrusion adapted to engage the bar to support the tray in a second, extended, package-loading position.

Abstract: A cooler display rack for use in a walk-in refrigerated cooler. The cooler display rack consists of a series of L-shaped frame sections formed from generally upright posts secured at their bottom end by an elongated shoe to form the individual frame sections. The frame sections are joined to adjacent frame sections by spacer panels and by a plurality of shelves supported in a cantilevered manner between a pair of adjacent posts. The individual shelves are supported between the posts by shelf support brackets and can be selectively positioned vertically along the height of the post, horizontally forward and backward relative to the post, and angularly with a gravity feed inclination between an approximate 8.degree. forward slope and approximate 1.degree. back slope. Bumper wires are inserted through holes in the shelves at the front edge thereof for retaining merchandise contained on the shelves.

Abstract: An improved cantilever rack storage system having a number of vertically spaced, horizontal load supporting surfaces wherein the front and rear beams are releasably secured to the cantilever arms without the use of bolts or similar fasteners and where each load supporting surface is further stabilized by the use of cross arms which also do not require bolts and fasteners.

Abstract: A plurality of racking systems are adapted to store palletized cartons in a refrigeration unit or the like prior to shipment of the cartons to market. Each racking system comprises laterally spaced overhead support platforms having their inner ends suitably spaced apart to provide a clearance accommodating the entrance of an extended mast of a lift truck therein. Upper groups of palletized cartons are loaded and stored on the platforms, next followed by the depositing of lower groups of palletized cartons within a lower storage space located at ground level.

Abstract: Shelving apparatus includes a base member with upright supports. A frame member is telescopically inserted on the base supports, and includes horizontal slide supports for receiving slide mounting members of a shelf. Pairs of shelves may be mounted on a single slide support to provide flexibility in configuring the shelving apparatus.

Abstract: The present invention teaches a modular fixture (also sometimes in the trade referred to as fixture-ware) system, the features of which include and are characterized by the user's ability to set the system up and "knock it" down without the need of tools. This attractive and unique fixture system includes one or more lockable bracket assemblies which may be lockably positioned at any one or more of several locking positions, while at the same time facilitating locking at any of a substantially infinite number of positions. At least one vertical support member is formed with what may to some look like an I-type beam configuration. The differences between this configuration and an actual conventionally used I-beam, however, are apparent. The bracket assemblies include non-vertical portions adapted to support hanging articles, such as by way of example only, clothing, which may be on hangers.

Abstract: An installation shelf arrangement or like storage arrangement comprising cantilever arms projecting substantially horizontally from substantially vertical uprights, in particular for the storage of long material, wherein the cantilever arms are each connected to the respective upright by a bolt-like member which passes through openings in the cantilever arm and apertures in the upright is to be simplified and made suitable for use for higher loads. For that purpose the upright (14) which carries the cantilever arms (16) has two channel-like profiles (24) which face towards each other with their open sides, and at least one transverse member (26, 27) which connects the profiles at a spacing (a) and which is fixed at both ends to a pair of substantially aligned profile limbs (38).

Abstract: Disclosed is a bracket or adapter for a shelving system using slotted mounting supports, in which the bracket has a single tab to provide a universal fit; a shelving system using such bracket; and a method for creating a shelving system with such a bracket to eliminate the need for inventorying a wide variety of brackets to fit the mounting supports of different manufacturers. The bracket has a notch between a main body of the bracket and the tab, with the lower end of a slot to be accommodated in the notch, the tab being passed into the slot. The tab has a supporting surface to provide against an inside face of the mounting support over a wide variety of slot sizes, and the main body has an elongated rearwardly facing surface to abut against an outside face of the mounting support. The tab is configured to facilitate insertion into slots of various lengths and various depths. A flange on the bracket is provided with elongated slots to compensaate for different shelving lengths.

Abstract: A heavy-duty, non-conductive support system for one or more electrical conduits and the like comprises a substantially uprightly positionable support structure and at least one bracket removably interlockable with the support structure. Both elements of the support system are preferably composed of a polymerized, non-conductive material. The bracket includes a conduit receiving portion and an interlocking portion. The interlocking portion includes two spaced apart fingers disposed in a side by side relationship. The support structure includes a central rib having two sides, each of the sides having finger-receiving slots defined therein.

Abstract: Showroom furniture construction system, composed of: a in mounted situation vertical stand, consisting of two vertical profile beams (1), which, on the top and bottom, are connected by cross beams (2), whereby the two vertical profile beams (1) are fitted with a groove (3) in longitudinal direction, in the bottom of which at desired distances a number of pin holes (4) is fixed: distance blocks (6) of which the pins (5) fit into the holes (4) of the groove (3): place-tray at one side and at one end fitted with protruding pins or pin holes (9): place-tray (8) supporting beams (12), at the top fitted with pin holes of protruding pins (10): place-tray supports (11), at one end fitted with two protruding pins (10) at the side planes and the bottom of the side planes fitted with a rectangular recess: vertical, compound supporting beam, at the inner surfaces of two parallel vertical beams, fitted with grooves at regular distances and starting from the long sides: locking blocks (13 ), fitted with protruding pins at

Abstract: An assembly for cantilevered connection of a display header to a gondola display rack includes two uprights braced to the gondola display rack in vertical spaced relation. Each upright rigidly supports a cantilevered arm that includes a lower section and an upper section hingedly raisable with respect to the lower section. Brackets located at the free ends of the upper sections are adapted to support the sides of a triangularly shaped display header. The upper sections may be hingedly raised with respect to the lower sections to independently vary the vertical level of the ends of the mounted display header. By providing two brackets on the hingedly raisable upper sections, the assembly accommodates quick and easy connection and disconnection of two display headers located side-by-side in a row at the desired vertical height.

Abstract: A cantilever racking system comprises vertical pillars formed of two metal sections of steel strip rolled to a cross-section comprising a central web portion bounded by two channel portions. The web portions are secured in facing relationship so that the juxtaposed channel portions form T-shaped slots having inturned marginal edges. Cantilever arms may be clamped in place against the end surfaces defined by channel portions for example by bolts engaging captive nuts engaging with the inturned edges of the metal strips.

Abstract: A fixture for displaying merchandise has telescoping structural members. A vertically extending tubular member adjustably supports an elongated member having a generally horizontal arm for displaying the merchandise and a vertical arm telescopingly received in the vertical tubular member. The telescoping vertical arm has a peripheral surface and a distal end with circumferentially spaced protuberances about the peripheral surface near the distal end for maintaining a spaced relationship between the peripheral surface of the telescoping vertical arm and the vertical tubular member. A collar or hub mounted on the upper end of the vertical tubular member has circumferentially spaced fingers for maintaining the peripheral surface of the telescoping vertical arm and the upper end of the vertical tubular member in spaced relationship.

Abstract: The present invention is directed to an adjustable merchandise display rack and, more particularly, to a display rack having a base structure, vertical standards extending upwardly at spaced positions along the base structure, and angled legs fixed to the base structure outwardly of the vertical standards at their lower end and which at their upper end are attached to the vertical standards in a manner accommodating some lateral misalignment of the leg with respect to the standard.

Abstract: A cantilevered shelf support for installation on a vertically extending channel having a face containing a longitudinally extending slot bordered by inwardly projecting flanges. The shelf support has a mounting bracket which is aligned and bolted to the vertical channel. A support bracket having a horizontally shelf engaging surface is aligned and assembled to the mounting plate without further hardware.

Abstract: The retailing display assembly is of the upright channel and slidably positionable and releasably anchorable type. The upright channel has an upright rear-wall provided with two columnar arrays of rearwardly struck lanced openings therethrough. The bracket includes a conventional horizontal hanger bar extending rigidly forwardly from an upright web member. The web member is provided with a pair of forwardly extending wings abuttable against the channel member front-walls and is further provided with a pair of downwardly and rearwardly extending tabs that are releasably anchorably protrudable through selectable co-elevational openings of the channel rear-wall.

Abstract: A display post, combination of display post and display arm and/or connecting member, and an assembly is provided wherein the display post comprises a hollow elongate support member, a series of spaced apertures in a wall of said support member and cover members removably mounted on said support member so as to leave exposed at least said series of spaced apertures.

Abstract: A shelf mounting system (100) is provided for releasably coupling a display shelf (10) to a substantially vertical planar surface (44) of a vertical support (40). The shelf mounting system (100) includes a bracket member (30) having a substantially vertically directed slot (38) at a first end (37). The bracket member (30) is adapted for coupling to a slotted standard (40) by a pair of hook shaped projections (32and 34) on a second end (39). Shelf mounting system (100) further includes an adaptor assembly (20) wherein an adaptor (22) is fixedly coupled on a first end (21) to a display shelf (10) and releasably coupled to the bracket member (30). The adaptor (20) further includes a pin (28) fixedly coupled within a pair of aligned poles (25 and 27) which engages the slot (38) of mounting bracket (30).

Abstract: A brace for a shelf support extending outwardly from an upright includes an elongated member having first and second ends, a first means on the first end of the elongated member for releasably securing the brace to an upright at a position below the shelf support, a second means on the second end of the elongated member for releasably securing the brace to the shelf support, the second means being pivotally connected to the elongated member so as to provide adjustablility of the angle between the elongated member and the second means.

Abstract: A shelf support system comprises a bracket member which is snapped into a vertical channel by means of a head portion which has asymmetrical recesses which co-act with asymmetrical jaws of the channel. One recess is placed over one of the jaws which then serves as a pivot while the other recess snaps over the other jaw. To assist in retaining a shelf on the bracket member, an integral spike is provided.

Abstract: A retainer for securing a shelf support to a wall. The retainer comprises a base having a first side for facing a wall and an oppositely facing second side. First and second spaced, generally parallel projections, extend generally perpendicularly outwardly from the second side of the base. A recess-engaging section extends generally perpendicularly outwardly from the second side of the base, between and generally parallel to the projections, and is adapted to be received within a recess in an end of a shelf support when the end of the shelf support is received between the projections. Means are disposed on the base for variably spacing the retainer from a wall. When the shelf support is disposed between the projections of the retainer, and the wall engaging means of the shelf support is inserted within a groove in the planar surface of the wall and engages a vertical member disposed within the wall, the projections inhibit lateral movement of the shelf support.

Abstract: An integrated modular store fixture system provided with a plurality of C-shaped rigid frame members, each having two horizontal arms and a vertical spine connecting the two arms and disposed at a rear portion of the unit and a plurality of rigid spacer elements connecting the frame members together in a spaced apart parallel relationship. A plurality of trays for holding merchandise to be displayed are releasably mounted between successive spines.

Abstract: A gravity feed shelf includes a plurality of chutes mounted on a rectangular frame having front and rear cross supports interconnected at their ends with a pair of side supports, the corner junctions between adjacent ends of the rear cross support and the side supports being formed by a lost motion connection in which front and back tabs on a support panel integral with each side support slide in slots formed in downwardly projecting elements of the rear cross support to accommodate sidewise motion of the side supports relative to the rear cross support so that variations in the horizontal spacing between vertical support posts on which the shelf is mounted due to manufacturing or installation procedures may be accommodated since the interconnection between these support posts and the shelf is via the rear ends of the side supports.

Abstract: In a sheet metal shelving unit with adjustable telescoping slotted uprights, the upper part of each upright has its slots in a recessed surface so that the upper part does not interfere with shelf bracket tabs projecting rearwardly through slots in the lower part of the upright.

Abstract: An integrated modular store fixture system has at least two spaced apart parallel vertical members at the rear of the system with side surfaces facing each other and having a series of aligned holes therein. A display assembly or a pull-out tray assembly is engageable with holes into members for holding merchandise to be displayed at the front of the system. The assemblies include two side support elements, each extending from the rear to the front of the system when in the mounted position with one end at the rear having members projecting transverse to the support elements and each projecting member inserted into one hole in one vertical member. The side support elements are releasably retained in the mounted position by a horizontal elongated stretcher member having downwardly depending pins and which are slidably received in tubular members on each support element. A tray or J-hook is mounted on the support elements for holding merchandise to be displayed.

Abstract: A cantilever arm assembly and its associated structure for modular furniture systems, such as laboratory and office furniture systems, in which such cantilever support arms may be connected to slotted standards at selected elevations to support worktops, cabinet units, shelving, and the like. Each arm is rigidly joined to a vertically-elongated mounting member equipped at its upper end with a series of hooks receivable in the slots of the standard. At its lower end, the mounting member is equipped with a locking element movable between extended and retracted positions and, when extended, projects into one of the slots of the standard to secure the mounting member against upward movement that might result in unintentional unlatching of the hooks. In addition, the locking element, when extended, causes slight pivotal movement of the mounting member to force hooks of the vertical series into tight wedging engagement with the slotted standard as well as to adjust the support arm into level condition.

Abstract: A knockdown rack comprising three vertical posts having diverging legs at their lower ends for stably supporting the rack and a pair of supports fastened between the posts at vertically spaced locations for rigidly interconnecting the posts in a formation wherein the posts lie generally on a first circle with the posts spaced at about 120 degree intervals on the circle and the lower ends of said legs lie generally on a second circle larger in diameter than the first circle. Each support comprises a relatively flat horizontal member having three peripheral recesses therein for receiving the posts. Each recess has a mouth for insertion of a respective post inwardly through the mouth into the recess and a wall structure formed and configured for contact by the post at three separate locations on the circumference of the post. The wall structure has a height not substantially less than the diameter of a respective post for engagement with a substantial length of the post at spaced lines of contact.

Abstract: A cooking device, having a base on which a pan or the like may rest; vertical standard collapsibly secured to the base; and a housing removably mounted on the standard for holding a heating element horizontally in opposition to the base; the housing is provided with a removable concave cover and removable flaps depending lengthwise from its sides to enclose the space between the heating element and the base, preventing the escape or splattering of food, juices, fats, and concentrating the heat inwardly thereof.

Abstract: A pair of L-shaped support members each include integrally connected vertical and horizontal channel members on which a shelf member and back member are supported. The horizontal channel member tapers rearwardly and the vertical channel member tapers upwardly. Uprights are bolted to the vertical channel members and carry brackets for supporting shelves. The lowest shelf is positioned directly above the floor on the horizontal channel members.

Abstract: A storage rack comprising a series of columns for supporting shelves with each column having slots at vertically spaced intervals corresponding to locations for supporting shelves, the slots on one column being horizontally aligned with the slots on the column adjacent thereto, shelf supports each supported by at least the slots on the associated column with each of the supports extending horizontally across the columns both forwardly and rearwardly of the columns thereby supporting shelves on opposite sides of the columns, fastener means fixedly locking the shelf supports in a fixed position relative to the columns, shelves mounted at opposite ends of the shelf supports on opposite sides of the columns with the columns being positioned centrally of the shelves as opposed to an outside location insuring maximum available shelf space with unimpaired access to the shelves, and shelf fastener means securing the shelves in fixed unitary assembly relative to the shelf supports.

Abstract: A cantilever rack construction for holding material in which there is a base with a generally vertical column having a generally vertically extending web and flange, a cantilever arm, and a pair of connectors for mounting the cantilever arm on the flange of the vertical column, each of the connectors being secured to the cantilever arm and adapted to be mounted on said column at a flange portion. The connectors are constructed and arranged to contact the flange portions at a medial location between the tip and the web thereof.

Abstract: A linking means is disclosed for releasably connecting and quickly disconnecting two relatively discrete members in longitudinally aligned load bearing or load transmitting relationship to each other. The discrete members are connected by the coaction of hook-like flanges strategically disposed upon one member with angularly disposed retainer flanges disposed upon the other discrete member and the containment of a portion of one member between spaced outreaching flange members integrally formed upon said second member while a portion of the confronting edges of both members engage.By disengaging the confronting edges of the member and vertically moving the first member relative to said second member, a quick disconnect is achieved.

Abstract: A merchandise support assembly consists of firstly a coupling with two siamesed sockets, one for engaging the vertical column of a display stand, the other being directed obliquely downwards, and an integral hook for the alternative support of the coupling, such hook being adapted to engage a horizontal rail or rails; secondly, a bar which is supported by the oblique socket and thirdly, a set of sleeves each capable of being slid end to end over the bar. The sleeves each have lugs which form a spaced series for determining the spacing between clothes-hangers or other display aids.

Abstract: A load support system including a plurality of cantilever shelf elements each having a selectively shaped and oriented bracket assembly at one end thereof for conjointly permitting vertical displacement of the cantilever shelf elements relative to a vertical standard and locking thereof in selected load-bearing location in response to angular disposition of said shelf element relative to said standard.

Abstract: For use in adjustable cantilever rack systems having upright support columns connected to brackets having cantilever arms, a retaining means is provided for securing the bracket to a column member against accidental disconnection, said retaining means including a retaining pin arranged to fit within an aperture located substantially on the neutral axis of a load bearing surface of the column to restrict upward movement of the bracket relative to the column and prevent accidental disengagement caused by upwards, sideways or oblique torsional blows. The retaining pin can be resiliently biased by a flat spring to snap into place once the bracket and column are connected, and the retaining means can also be provided with a thumb latch to provide simple disengagement.

Abstract: A shelf bracket for removably attaching shelves to a display panel. The bracket is of unitary construction and particularly adaptable to be formed by extrusion of aluminum, or the like. The bracket comprises a back portion adapted to grip the panel and having two parallel portions extending horizontally therefrom. The parallel portions are spaced apart the thickness of the shelf. The lower parallel portion has a front edge with a high coefficient of friction and extends outward from the back portion a distance sufficient that the weight of the shelf extending therebeyond causes a rotational force against the gripping front edge sufficient to prevent the shelf from pulling out from between the two parallel portions in normal use.