Reinforced plastic pallet

• US 5,791,262 A
• Filed: 06/10/1994
• Issued: 08/11/1998
• Est. Priority Date: 02/14/1994
• Status: Expired due to Term

• Current Assignee: The Fabri-Form Company
• Original Assignee: The Fabri-Form Company
• Inventors: Mullock, Daniel Clark, Baker, Paul W., Jones, David Paul, Knight, John W.
• Primary Examiner(s): Chen, Jose V.
• Application Number:
  US08/258,433
• Time in Patent Office: 1,523 Days
• Field of Search: 100/901, 100/902, 100/55.3, 100/55.1, 100/51.1, 100/51.11
• US Class Current: 108/57.25
• CPC Class Codes: B65D 19/0012 forming a continuous plane contact surface
• CPC Class Codes: B65D 19/0018 and each contact surface having a discrete foot-like shape
• CPC Class Codes: B65D 2519/00034 Plastic
• CPC Class Codes: B65D 2519/00069 Plastic
• CPC Class Codes: B65D 2519/00268 made of one piece
• CPC Class Codes: B65D 2519/00288 made of one piece
• CPC Class Codes: B65D 2519/00318 made of one piece
• CPC Class Codes: B65D 2519/00338 contact surface having a discrete foot-like shape
• CPC Class Codes: B65D 2519/00407 on the load supporting surface
• CPC Class Codes: B65D 2519/00412 on the base surface
• CPC Class Codes: B65D 2519/00432 Non-integral, e.g. inserts B65D2519/00462 takes precedence
• CPC Class Codes: B65D 2519/00437 on the load supporting surface
• CPC Class Codes: B65D 2519/00557 without separate auxiliary elements
• CPC Class Codes: B65D 2519/00562 chemical connection, e.g. glued, welded, sealed
• CPC Class Codes: Y10S 108/901 Synthetic plastic industrial platform, e.g. pallet

Abstract

A reinforced pallet (10) includes an upper surface (11) and a pair of opposing support sides (14, 15). The pallet (10) also includes at least one reinforcing bar channel (50) and a reinforcing bar (40) received within reinforcing bar channel (50). A twin-sheet pallet (10) is formed vacuum-forming a first plastic sheet (33a) to a first mold section (30) and a second plastic sheet (33b) to a second mold sheet (31), wherein a preselected portion of the second mold section (31) is sealed such that the second plastic sheet (33b) is not vacuum-formed. The mold sections (30, 31) are then moved together and the sheets (33a, 33b) are compressed together at preselected locations. A thermoformed, plastic pallet (10) for bearing and positioning a load, also includes and a retaining wall assembly (90) carried by the upper surface (11); the retaining wall assembly (90) including a wall-receiving slot (91) in the upper surface (11) and a retaining wall (92) received and positioned within the slot (91).

Claims

1. A thermoformed, plastic pallet for bearing and positioning a load, comprising a generally rectilinear body having an upper surface and a lower surface and at least one side surface, a retaining wall assembly carried by said upper surface;

and an edge protrusion integrally formed in said upper surface having a longitudinal dimension substantially greater than its width such that the useful surface area of said upper surface is substantially unobstructed by said edge protrusion, said edge protrusion positioned approximate to at least one side surface, said edge protrusion extending upwardly from said upper surface so as to cooperate with said retaining wall assembly to position the load;

said retaining wall assembly including a wall-receiving slot in said upper surface, said slot having a profile, and a wall positioned within said slot, said wall having a profile substantially similar to said profile of said slot such that the entire profile of said wall extends into said slot between said upper surface and said lower surface.

2. A pallet as set forth in claim 1, wherein said wall means is at least partially held in place within said slot by friction.

3. A pallet as set forth in claim 1, wherein said slot is L-shaped.

4. A pallet as set forth in claim 1, wherein said slot is downwardly and inwardly tapered.

5. A pallet as set forth in claim 1, further comprising reinforcing protrusions extending between said upper and lower surfaces.

6. A pallet as set firth in claim 1, wherein said wall is fabricated from a material selected from the group consisting of cardboard, wood, metal and plastic.

7. A pallet as set forth in claim 1, wherein said retaining wall assembly is centrally positioned within said upper surface.

8. A pallet as set forth in claim 1, wherein the pallet comprises a plurality of said retaining wall assemblies.

9. A reinforced, thermoformed, plastic pallet for bearing a load, comprising a generally rectilinear body having an upper surface and a lower surface and a pair of opposing support sides;

at least one reinforcing bar-receiving channel extending substantially longitudinally between said at least one pair of opposing sides;

reinforcing bar means received within said at least one reinforcing bar-receiving channel, said reinforcing bar means being of a thin-steel construction having a height dimension substantially greater than a width dimension, said bar positioned in the pallet such that said height dimension is substantially normal to said upper and lower surfaces;

a retaining wall assembly carried by said upper surface; and

at least one reinforcing protrusion extending between said upper and lower surfaces adjacent said retaining wall assembly, said upper surface and said lower surface contacting each other at said reinforcing protrusions;

said retaining wall assembly including a wall-receiving slot in said upper surface and a retaining wall positioned within said slot to extend upwardly from said upper surface.

10. A pallet as set forth in claim 9, wherein said retaining wall assembly further comprises an edge protrusion positioned proximate to at least one said support side, such that said edge protrusion extends upwardly from said upper surface so as to cooperate with said retaining wall assembly to position the load.

11. A pallet as set forth in claim 9, wherein said wall means is at least partially held in place within said slot by friction.

12. A pallet as set forth in claim 9, wherein said slot is L-shaped.

13. A pallet as set forth in claim 9, wherein said slot is downwardly and inwardly tapered.

14. A pallet as set forth in claim 9, wherein said wall is fabricated from a material selected from cardboard, wood, metal and plastic.

15. A pallet as set forth in claim 9, wherein said retaining wall assembly is centrally positioned within said upper surface.