Shielded non-metallic container

• US 4,227,037 A
• Filed: 05/29/1979
• Issued: 10/07/1980
• Est. Priority Date: 05/29/1979
• Status: Expired due to Term

• Current Assignee: Wickes Manufacturing Co.
• Original Assignee: Gulf & Western Manufacturing Company
• Inventors: Layton, Paul L.
• Primary Examiner(s): Reynolds, B. A.
• Assistant Examiner(s): Tone, D. A.
• Application Number:
  US06/043,206
• Time in Patent Office: 497 Days
• Field of Search: 174/35 R, 174/35 MS, 174/50, 361/424, 264/104, 264/105, 220/72, 220/DIG. 11, 220/DIG. 12, 220/DIG. 21, 336/84 C, 219/10.55 D
• US Class Current: 174/386
• CPC Class Codes: B29C 70/08 comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
• CPC Class Codes: B29C 70/882 partly or totally electrically conductive, e.g. for EMI shielding conductive floors or floor coverings H05F3/025; EMI shielding in general H05K9/00
• CPC Class Codes: B29K 2105/0854 in the form of a non-woven mat
• CPC Class Codes: B29K 2277/00 Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as reinforcement
• CPC Class Codes: B29K 2707/04 Carbon
• CPC Class Codes: B29K 2709/08 Glass
• CPC Class Codes: B29K 2995/0005 Conductive
• CPC Class Codes: B29L 2031/712 Containers; Packaging elements or accessories, Packages closures therefor B29L2031/56; ink or toner cartridges B29L2031/7678; squeeze tubes B29L2023/20; suitcases B29L2031/7418
• CPC Class Codes: H05K 9/0045 being rigid plastic containers having a coating of shielding material

Abstract

A shielded, non-metallic container is provided including complementary upper and lower portions adapted to mate and engage in order to define an enclosed chamber. The upper and lower portions are laminated with a non-metallic, electrically conductive inner layer integrally molded to and bonded between at least two outer non-metallic reinforcing layers. This construction permits shielding of the chamber from electromagnetic and radio frequency interference. A method for manufacturing the container is further provided.

Claims

1. A container including complementary upper and lower portions, each portion adapted to mate with and engage to define an enclosed inner chamber, said upper and lower portions each having laminated outer casings wherein a non-metallic, electrically conductive, inner layer is integrally molded with and bonded to and between at least two outer non-metallic reinforcing layers to shield said inner chamber from electromagnetic and radio frequency interference.

2. The container of claim 1 wherein said non-metallic, electrically conductive inner layer is a high strength, high modulus long fiber carbon filament mat.

3. The container of claim 2 wherein said carbon fibers are greater than one inch in length.

4. The container of claim 1 wherein said non-metallic reinforcing layers are selected from the group consisting of chopped strand fiberglass, continuous strand fiberglass and aramid fiber mats.

5. The container of claim 1 wherein said layers are molded together using thermosetting resins selected from the group consisting of polyesters, epoxys, silicones and phenolics.

6. The container of claim 1 wherein said layers are molded together using thermoplastic resins selected from the group consisting of vinyl esters, urethanes, acrylics, polycarbonates and ABS copolymers.

7. A container including complementary upper and lower portions adapted to mate and engage to define an enclosed inner chamber, said upper and lower portions each having laminated outer casings wherein a non-metallic, electrically conductive, inner layer of a high strength, high modulus, long fiber, carbon filament mat is integrally molded with and bonded to and between at least two outer, reinforcing layers of chopped strand fiberglass mat with a thermosetting polyester resin, said inner, electrically conductive layer adapted to shield said inner chamber from electromagnetic and radio frequency interference.

8. The container of claim 7 wherein said carbon fibers are greater than about one inch in length.