US3693823A - Repairable plastic and wire crate - Google Patents

Repairable plastic and wire crate Download PDF

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Publication number
US3693823A
US3693823A US31497A US3693823DA US3693823A US 3693823 A US3693823 A US 3693823A US 31497 A US31497 A US 31497A US 3693823D A US3693823D A US 3693823DA US 3693823 A US3693823 A US 3693823A
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Prior art keywords
crate
apertures
tray
extending
body portion
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US31497A
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English (en)
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Houston Rehrig
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D15/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, sections made of different materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
    • B65D7/12—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls
    • B65D7/14—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls of skeleton or like apertured construction, e.g. baskets or carriers formed of wire mesh, of interconnected bands, bars, or rods, or of perforated sheet metal
    • B65D7/20—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls of skeleton or like apertured construction, e.g. baskets or carriers formed of wire mesh, of interconnected bands, bars, or rods, or of perforated sheet metal made of wire

Definitions

  • ABSTRACT A material handling crate having a molded plastic bottom panel portion and a body portion formed from n plurality of rod-like metallic members rigidly joined in fixed relation with an improved means for securing the References Cited UNITED STATES PATENTS bottom portion and the body portion together to per- 't assembly and disassembly of the structure to 3,428,204 Wilson................. «220/4 R 2997,55 8/l96l Muckler ........220/
  • SHEET 1 [1F 3 INVENTOR HOUSTON REHRIG BY gap/1A g 321 GM ATTORNEYS PATENTED SEP26 I972 SHEET 2 BF 3 INVENTOR HOUSTON REHRIG BY i '91 ATTORNEYS PATENTED SEP 26 m2 SHEET 3 OF 3 iNVENTOR HOUSTON mm ATTORNEYS REPAIRABLE PLASTIC AND WIRE CRATE FIELD OF THE INVENTION
  • This invention relates to material handling crates, and more particularly to an improved repairable material handling crate having separable bottom and side portions constructed of dissimilar materials.
  • the rigidly welded structure interconnecting the wire frame and plastic components of the prior art crates did not readily lend itself to disassembly of the component parts so that a crate having only one portion damaged would normally have to be scrapped or returned to the manufacturer for repair at considerable cost.
  • the plastic bottom portion of a new crate might be damaged, as by a nail or rough joint in a pallet, while the wire frame portion of the crate remains completely undamaged. Yet, it might well be more economical to scrap the undamaged portion than to return it to the manufacturer for repairs.
  • Another object of the invention is to provide such a material handling crate in which the bottom portion of the crate is formed from a molded plastic material and the body portion of the crate is formed as a rigid wire frame structure, with the body portion being releasably mounted on the bottom portion to form a rigidly assembled crate.
  • Another object of the invention is to provide an improved connection means for releasably connecting separately formed bottom and body portions of a crate into a rigid assembly.
  • Another object is to provide a repairable material handling crate having portions of molded plastic and other portions of welded wire frame construction.
  • a material handling crate in which the bottom portion is injection molded from a synthetic resin material in the form of a shallow tray including a bottom panel and an integrally molded skirt or flange extending upwardly along the edges of the bottom panel to define the side panels of the shallow tray.
  • the body portion of the crate is made of a plurality of upwardly extending metallic rod or wire members arranged to define the side walls of the crate.
  • the side walls are joined at spaced intervals along their length by a plurality of endless horizontal rod members extending around the outer peripheral surface of the body portion and rigidly joining the side walls at the comers of the crate.
  • a plurality of apertures are formed at spaced intervals around the top of the skirt and the vertical wire members of the side walls have reversely bent tab portions on their lower ends which are disposed within and project through the apertures.
  • An elongated wire pin member positioned along the outer surface of each side wall of the skirt'extends through the reversely bent tab portions to rigidly retain the wire frame and the plastic portions of the crate in rigidly assembled relation.
  • the elongated wire pin members may be forcibly withdrawn to permit the tab elements to be withdrawn from the apertures when it is desired to disassemble the plastic and wire frame portions.
  • the user of the crate may disassemble the structure, replace the damaged portion, and realize a very substantial saving over the price of a new crate or the cost of returning the crate to the manufacturer for possible repair.
  • one of the endless horizontal rod members is located adjacent the bottom edge of the wire frame body in position to be seated on a ledge formed adjacent the top of the plastic skirt.
  • a plurality of removable retainer members project through apertures in the plastic skirt and releasably engage the rod member to rigidly clamp the rod in firm engagement with the ledge.
  • FIG. I is a perspective view of a wire frame and plastic crate embodying my invention.
  • FIG. 2 is an exploded perspective view illustrating the manner of assembly of the components of the crate shown in FIG. 1;
  • FIG. 3 is an enlarged, fragmentary sectional view taken on line 3-3 of FIG. 1',
  • FIG. 4 is an exploded view similar to FIG. 3 illustrating the assembly of the components
  • FIG. 5 is a view similar to FIG. 3 taken on line 5-5 of FIG. I;
  • FIG. 6 is a fragmentary sectional view taken on line 6-6 of FIG. I, with portions broken away to more clearly illustrate other portions;
  • FIG. 7 is a fragmentary exploded view, in perspective illustrating the manner of assembling the components of an alternate embodiment of the invention.
  • FIG. 8 is a sectional view, in elevation, showing the components of FIG. 7 in assembled relation;
  • FIG. 9 is a fragmentary view taken on line 9-9 of FIG. 8;
  • FIG. I0 is a perspective view of a tool suitable for use in disassembly of the assembly shown in FIGS. 7-9;
  • FIG. 11 is a fragmentary sectional view similar to FIG. 8 and illustrating a further embodiment of the inventiomand
  • FIG. 12 is a side elevation view of the structure shown in FIG. 11.
  • a generally rectangular material handling crate embodying the invention is indicated generally by the reference 10. and illustrated as including a molded plastic bottom, or tray portion 12 and an upwardly extending wire frame body portion 14.
  • the body portion 14 includes perpendicularly arranged side walls, each made up of a plurality of generally vertically extending rod-like metallic wire members 16 rigidly retained in their respective positions by welding to a plurality of horizontal endless rod members 18 disposed around the outer periphery of the body portion 14.
  • a sheet metal corner guard 20 may be mounted between adjacent wire members 16 at each corner of the body portion, if desired.
  • Each of the vertical wire members 16 terminate in a downwardly depending cantilevered lower end portion with a reversely bent, substantially V-shaped connecting tab 22 adjacent its distal end.
  • the vertex portion of the respective V-shaped connecting tabs 22 are all directed outwardly from the side panels for the purpose to be described more fully herein below.
  • the lowermost endless rod member 18 is spaced substantially above the connecting tabs 22 to permit the respective rod members 16 to be resiliently deflected inwardly from their normal vertical position.
  • the molded plastic bottom portion 12 is in the form of a shallow tray and includes a rectangular bottom panel 26, preferably of an open grid construction defined by a plurality of perpendicularly arranged web members 28, 30, 32. Also, bottom panel 26 preferably has an integrally molded stacking ring 34 extending around its bottom peripheral edge.
  • a bottom panel structure of this general type is described in detail in U. S. Pat. No. 3,351,228, assigned to the assignee of the present invention, and reference to this prior patent may be had for a more complete understanding of the construction.
  • Bottom portion 12 includes a skirt 36 integrally molded with the bottom panel 26 and projecting upwardly from the peripheral edges thereof to define the side walls of the tray.
  • the tray is relatively shallow when compared to the overall depth of the crate.
  • the skirt 36 has a smooth vertical inner surface 38 and terminates at its top edge in a first outwardly directed flange 42.
  • a second flange 44 is integrally formed on and projects outwardly from the outer surface of skirt 36 in vertically spaced parallel relation to flange 42.
  • Flanges 42 and 44 are of relatively heavy cross section and extend completely around the periphery of the tray to add strength and rigidity to the top of the skirt 36.
  • a pair of parallel webs 46, 48 Positioned between flanges 42 and 44 are a pair of parallel webs 46, 48 which project outwardly from the outer surface of skirt 36 to define a channel, or groove 50 along each side wall of the tray.
  • a plurality of apertures 52 are formed in skirt 36 at spaced intervals around the entire periphery thereof.
  • Apertures 52 are in the form of elongated notches extending downwardly from the top edge of skirt 36, terminating at a position approximately adjacent the top edge of flange 44. These notches extend laterally into flange 42 only to a depth approximately equal to the diameter of vertical rod members 16, but extend completely through webs 46 and 48, as seen in FIG. 4 and 6. Also, as seen in FIG. I, the webs 46, 48 do not extend completely to the corners of the tray but rather terminate a slight distance therefrom for the purpose more fully'explained herein below.
  • the wire frame body portion 14 is assembled 'onto the molded plastic tray, or bottom portion 12, by placing the tray on a support surface and positioning the inclined lower outer surface 54 on each tab 22 into the top of one of the notches 52. Vertical pressure is then applied to the top of the wire frame section, camming the downwardly depending lower portion of the vertical wire element 16 inwardly until each tab 22 snaps past the flange 42 and projects outwardly through an aperture 52 as seen in FIG. 3.
  • An elongated wire pin 56 is then inserted in the channel 50 between webs 46 and 48 and threaded therealong passing through the vertex of the tabs 22.
  • the ends 58 of the pins 56 are tapered, or slightly sharpened as indicated at 57 in FIG.
  • Pin 56 fits snugly between webs 46 and 48, and firmly engages the vertex portion of tabs 22 to rigidly retain the wire frame and molded plastic components in assembled relation without use of the welded joints employed in the prior art wire frame and plastic crates mentioned above. Elimination of the welded joints greatly facilitates assembly and substantially reduces the manufacturing cost of the crate.
  • the webs 46, 48 do not extend the full length of the side walls of the tray, whereby the pin normally projects outwardly therefrom as illustrated at 58 in FIG. 1. Retaining web 59 prevents the pin from working out of position during prolonged use of the crate.
  • the construction of the connection is such that vertical loads applied to the crate are not concentrated at the juncture of the vertical rod members and the plastic bottom, but instead this load is distributed through the pins 56 and webs 46, 48 along a substantial portion of the side panels.
  • the tests have shown that a vertical load of up to 3,000 pounds applied to the top of such a crate will not damage or in any way adversely affect this rigid connection.
  • the molded plastic bottom tray portion 112 includes a rectangular bottom panel 126 identical to that employed in the plastic tray 12 described above.
  • the vertically extending side wall, or skirt 136 has a smooth inner surface 138, and terminates at its top edge in an outwardly directed flange 140 having an integrally formed vertically extending flange 142 formed around its outer periphery to define a substantially L-shaped ledge 144 extending around the top of the plastic tray.
  • a second outwardly directed flange 146 is integrally formed on the outer surface of the skirt 136 and extends around the peripheral surface thereof in vertically spaced relation to the top flange 140.
  • a plurality of apertures 152 are formed in the plastic skirt 136 at spaced intervals around the entire periphery thereof.
  • the apertures 152 are in the form of notches extending downwardly through the top horizontal surface of ledge 144 and the wall 136 to a position adjacent the top surface of flange 146.
  • the wire frame body portion employed in this embodiment is similar to that illustrated in FIG. 1 of the drawings and differs therefrom only in that the vertical wire members 116 do not have the V-shaped connecting tabs formed on their bottom end, but instead have an endless rod member 118 rigidly welded, as at 122, adjacent their bottom ends.
  • endless rod member 118, and the bottom end portions 120 of vertical wire 116 normally rest on the top surface of ledge 144, with the rod member 118 engaging the vertical inner surface of the flange 142 so that the inner surface 138 of skirt 136 is positioned in the same vertical plane with the inner surface of the vertical wires 116.
  • the wire frame portion is releasably secured on the plastic tray 112 by elongated wire connecting members 154 positioned between flanges 140 and 146.
  • Connecting members 154 each have a plurality'of reversely bent, hook-shaped tab portions 156 formed therein in position to project one through each of the openings 152 along each side of the plastic tray.
  • the wire fastener 154 is inserted into the space between flanges 140 and 146 by first inserting the hooked end portions 158 of the tabs 156 through apertures 152.
  • the hooked ends of tabs 156 are then turned upward and forced to snap over the horizontal rod member 118 to rigidly clamp the flange 138 between the horizontal portion of wire connector 154 and the endless rod member 118.
  • the tabs 156 may be forced over the rod 118 by a suitable clamping tool such as a pair of pliers, or the like, or alternatively the crate may be turned on its side so that the outer surface of flange 142 rests on a support surface, then striking the individual tabs 156 with a hammer to snap the tabs one-at-a-time over the rod 1 18.
  • a suitable clamping tool such as a pair of pliers, or the like
  • the crate may be turned on its side so that the outer surface of flange 142 rests on a support surface, then striking the individual tabs 156 with a hammer to snap the tabs one-at-a-time over the rod 1 18.
  • a suitable tool such as that illustrated in FIG. 10 is employed to book under the outwardly directed end portion 158 of the tabs 156 to force the tab up and inward over the endless rod 118.
  • this tool may include an elongated lever member 160 having an outwardly projecting hook 162 formed thereon, with a heel, or base 164 adapted to rest against the inner peripheral surface of the plastic skirt 136.
  • the heel 164 has an enlarged portion 166 adapted to fit within the aperture 152 to engage the base of the connecting tabs 156 so that, as force is applied to the handle 168, the hook 162 engaging the tab end 158 will apply a rotating motion to the tab 156 to lift and turn the tab off the endless rod 118. This in no way damages the connecting wire 154 so that it may be repeatedly installed and removed.
  • FIGS. 11 and 12 of the drawings there is illustrated a further embodiment of the invention, which differs only slightly from that shown in FIGS. 7 through 9.
  • This embodiment employs the same wire frame portion of the crate as that illustrated in FIGS. 7 through 9, and the plastic tray portion 212 differs from tray 112 primarily in that the apertures 252 extend vertically from the top of ledge 242 throughout the full height of the skirt 236 and through a horizontal flange 244 extending around the peripheral edge of the bottom panel 226.
  • the wire frame and plastic tray portions are retained in assembled relation by a welded wire connector assembly positioned along each side of the plastic crate to resiliently clamp the endless horizontal bar 1 18 onto the ledge 240.
  • the welded connector assembly includes a horizontal bar member 254, which extends beneath and engages the bottom surface of the horizontal flange 244, and a plurality of upwardly extending clamping elements 256.
  • the clamping elements 256 are in the form of vertical rod members each terminating at its upper end in a reversely bent or hooked portion 258 adapted to snap over and resiliently retain the horizontal bar 118 in the same manner as that described with respect to the embodiment illustrated in FIGS. 7-9.
  • the components of this embodiment are assembled in much the same manner, inserting the hook members through the elongated slottype apertures 252 until the rod member 254 firmly engages the bottom surface of flange 244 beneath skirt 236. The hook portion 258 is then snapped over the horizontal rod 1 18 as described above.
  • the inner surface of the crate walls may readily be maintained as a planar surface, thereby eliminating any protrusions into the crate which might interfere with filling the crate.
  • a further and important advantage is the ability of the user of the crate to apply appropriate markings, names, or the like, to the outer surface of the panels of the tray.
  • a repairable material handling crate comprising a bottom portion in the form of a shallow tray molded from a plastic material and including a rectangular bottom panel and upwardly directed side panels at each side edge of said bottom panel, an upwardly extending body portion formed from a plurality of elongated rodlike metal members rigidly welded in fixed relation, connecting means releasably mounting said body portion on said bottom portion to form a rigidly assembled structure, said connecting means including a plurality of apertures formed in and extending through said side panels at positions spaced above said bottom panel, anchoring tab means formed on said rod-like metal members and projecting through said apertures, and removable pin means engaging said tab means and said bottom portion to form a high strength interlocking connection between said body and said bottom portions, said connecting means being operable to permit disassembly and reassembly of said body and bottom portions whereby a damaged crate may be repaired by disassembling the crate and replacing a damaged portion thereof.
  • connecting means further comprises means defining an outwardly directed channel along an outer surface of each said side panel, said pin means being disposed within said channel.
  • a high strength material handling crate comprising a tray molded from a plastic material defining the bottom portion of the crate, said tray including a bottom panel and an integrally molded upwardly extending skirt defining the side panels of the tray, a body portion defined by a plurality of side walls rigidly joined along contiguous edges, said body portion being formed from a plurality of elongated rod-like metal members rigidly welded in fixed relation to define an open framework, and connecting means releasably joining the lower edge portion of said side walls one to each side panel of said tray to form a rigidly assembled crate with said side panels and said side walls cooperating to define the sides of said crate, said connecting means forming a high strength load carrying joint between said body and bottom portions and including a plurality of apertures formed in said skirt at spaced intervals therearound, a plurality of connector tabs integrally formed on said body portion and extending through said apertures, and elongated connector wire means releasably connecting said panels and said side walls to rigid
  • said tab means comprise a plurality of individual tabs formed one on at least selected ones of said rod-like metal members at spaced intervals around the periphery of said crate, and wherein said wire means comprises an elongated wire pin adapted to engage said tabs projecting through said apertures.
  • said wire means comprises an elongated wire-like pin member extending along substantially the full length of each said side panel, each said pin extending between one of said side panels and the associated tabs to retain said tab against withdrawal from said apertures, said pins being adapted to be withdrawn longitudinally of themselves to permit said tabs to be withdrawn from said apertures.
  • stop means comprises a channel extending horizontally along the outer surface of said side panels adjacent said apertures.
  • a high strength material handling crate comprising a tray molded from a plastic material defining the bottom portion of the crate, said tray including a bottom panel and an integrally molded upwardly extending skirt defining the side panels of the tray, a body portion defined by a plurality of side walls rigidly joined along contiguous edges, said body portion being formed from a plurality of elongated rod-like metal members rigidly welded in fixed relation to define an open framework, and connecting means releasably joining the lower edge portion of said side walls one to each side panel of said tray to form a rigidly assembled crate with said side panels and said side walls cooperating to define the side of said crate, said connecting means forming a high strength load carrying joint between said body and bottom portions and including a plurality of apertures formed in said side panel at spaced intervals around said skirt, a removable elongated wire connector member extending along each side panel adjacent said apertures formed therein, and a plurality of connector tabs integrally formed on said elongated wire members
  • said elongated metal rod member comprises an endless rod extending around and rigidly welded to said body portion adjacent the bottom thereof, and wherein said connector tabs are integrally formed with said elongated wire members, said connector tabs being in the form of offset, generally U-shaped loops having their closed ends bent laterally into the shape of a shallow hook adapted

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
US31497A 1970-04-24 1970-04-24 Repairable plastic and wire crate Expired - Lifetime US3693823A (en)

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US3149770A 1970-04-24 1970-04-24

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US3693823A true US3693823A (en) 1972-09-26

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US31497A Expired - Lifetime US3693823A (en) 1970-04-24 1970-04-24 Repairable plastic and wire crate

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US (1) US3693823A (enrdf_load_stackoverflow)
CA (1) CA942693A (enrdf_load_stackoverflow)
DE (1) DE2063889A1 (enrdf_load_stackoverflow)
FR (1) FR2092318A5 (enrdf_load_stackoverflow)
GB (1) GB1301508A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4723679A (en) * 1986-02-28 1988-02-09 Sinchok John D Tray or tote box collar extension
US20160320120A1 (en) * 2010-12-08 2016-11-03 Ssw Holding Company, Inc. Multi-material basket for refrigerator or freezer
US10426315B2 (en) * 2017-02-21 2019-10-01 Whirlpool Corporation Dishwasher

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU116941A (en) * 1941-04-22 1942-12-17 John Williams William A vertical rotary moulding machine
GB563322A (en) * 1943-04-02 1944-08-09 John Edmund Leslie Marshall Improvements in or relating to the construction of cases or containers
US2804227A (en) * 1956-02-09 1957-08-27 Ernest T Elfgren Wire container structure
US2949207A (en) * 1958-09-22 1960-08-16 Rehrig Pacific Co Milk crate
US2997155A (en) * 1959-06-11 1961-08-22 Southern Hotel And Restaurant Rack construction for dishwashing machines
US3428204A (en) * 1967-10-11 1969-02-18 Banner Metals Inc Receptacle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU116941A (en) * 1941-04-22 1942-12-17 John Williams William A vertical rotary moulding machine
GB563322A (en) * 1943-04-02 1944-08-09 John Edmund Leslie Marshall Improvements in or relating to the construction of cases or containers
US2804227A (en) * 1956-02-09 1957-08-27 Ernest T Elfgren Wire container structure
US2949207A (en) * 1958-09-22 1960-08-16 Rehrig Pacific Co Milk crate
US2997155A (en) * 1959-06-11 1961-08-22 Southern Hotel And Restaurant Rack construction for dishwashing machines
US3428204A (en) * 1967-10-11 1969-02-18 Banner Metals Inc Receptacle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4723679A (en) * 1986-02-28 1988-02-09 Sinchok John D Tray or tote box collar extension
US20160320120A1 (en) * 2010-12-08 2016-11-03 Ssw Holding Company, Inc. Multi-material basket for refrigerator or freezer
US10281198B2 (en) * 2010-12-08 2019-05-07 Ssw Holding Company, Llc Multi-material basket for refrigerator or freezer
US11262122B2 (en) 2010-12-08 2022-03-01 Ssw Advanced Technologies, Llc Multi-lateral basket for refrigerator or freezer
US10426315B2 (en) * 2017-02-21 2019-10-01 Whirlpool Corporation Dishwasher

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Publication number Publication date
DE2063889A1 (de) 1971-11-11
CA942693A (en) 1974-02-26
FR2092318A5 (enrdf_load_stackoverflow) 1971-01-21
GB1301508A (enrdf_load_stackoverflow) 1972-12-29

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