Apparatus and method for making form-fitted molded protective cases for products

• US 20060255493A1
• Filed: 05/11/2005
• Published: 11/16/2006
• Est. Priority Date: 05/11/2005
• Status: Abandoned Application

• Current Assignee: SIK Incorporated
• Original Assignee: SIK Incorporated
• Inventors: Fouladpour, Afshin
• Application Number:
  US11/127,402
• Publication Number:
  US 20060255493A1
• Time in Patent Office: Days
• US Class Current: 264/161
• CPC Class Codes: B29C 2791/006 Using vacuum
• CPC Class Codes: B29C 51/10 Forming by pressure difference, e.g. vacuum
• CPC Class Codes: B29C 51/28 for applying pressure through the wall of an inflated bag or diaphragm
• CPC Class Codes: B29K 2023/12 PP, i.e. polypropylene
• CPC Class Codes: B29K 2027/06 PVC, i.e. polyvinylchloride
• CPC Class Codes: B29K 2055/02 ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
• CPC Class Codes: B29K 2069/00 Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
• CPC Class Codes: B29K 2995/002 Coloured
• CPC Class Codes: B29K 2995/0025 Opaque
• CPC Class Codes: B29K 2995/0026 Transparent

Abstract

A method and apparatus for making inexpensive, form-fitted, protective cases of thermal plastic or polycarbonate material that can be easily printed with decorative imagery and/or electronic circuitry for a variety of products, such as portable music players or radios, cell phones, lap-top computers, and the like. The method involves creating a tool having substantially the same surface dimensions of a product. An element is then molded from bulk film of thermoplastic material using the tool. Once the element is molded, it is trimmed from the bulk film. The resulting apparatus is a protective case intended to form-fit over the surface features and dimensions of the actual product used to define the tool.

Claims

18. An apparatus, comprising a protective case intend to form-fit over the surface features and dimensions of a product, the protective case made from a molded thermoplastic material excised from a bulk sheet of the thermoplastic material.

1. A method, comprising:

creating a tool having substantially the same surface dimensions of a product;

molding an element from bulk film material using the tool, the element configured to form-fit the product; and

trimming the element from the bulk film material.

2. The method of claim 1, further comprising printing a decorative image onto the bulk film material prior to molding the bulk film material so that the decorative image appears on the element after it has been molded.

3. The method of claim 1, further comprising printing the decorative image using one of the following printing methods:

a digital press;

silk screening, or a color press.

4. The method of claim 1, further comprising printing an electronic circuit onto the bulk film material prior to molding the bulk film material so that the electronic circuit appears on the element after it has been molded.

5. The method of claim 4, further comprising printing a conductive metal onto the bulk film material to form the electronic circuit.

6. The method of claim 4, further comprising printing a conductive ink onto the bulk film material to form the electronic circuit.

7. The method of claim 1, wherein molding the element from the bulk film material further comprises heating the bulk film material so that it conforms to the shape of the tool.

8. The method of claim 1, wherein molding the element from the bulk film material further comprises using a vacuum to pull the bulk film material onto the tool so that it conforms to the shape of the tool.

9. The method of claim 1, wherein molding the element from the bulk film material further comprises squeezing the bulk film between a male and a female tool to mold the bulk film material.

10. The method of claim 1, wherein molding the element from the bulk film material further comprises clamping the bulk film material over the tool to assist the bulk film material in conforming to the shape of the tool.

11. The method of claim 1, wherein molding the element from the bulk film material further comprises applying air pressure onto the bulk film material so that it conforms to the shape of the tool.

12. The method of claim 1, wherein molding the element from the bulk film material further comprises applying a pressurized bladder onto the bulk film material so that it conforms to the shape of the tool.

13. The method of claim 1, wherein molding the element from the bulk film further comprises:

inserting the bulk film material and tool into a chamber;

heating the bulk film material adjacent the tool; and

pressurizing the chamber to compensate for any sag of the bulk film material caused by heating the bulk film material.

14. The method of claim 1, wherein trimming the element from the bulk film material further comprises cutting the bulk film material along the X and Y directions to excise the element from the bulk film material after molding.

15. The method of claim 1, wherein trimming the element from the bulk film material further comprises cutting the bulk film material along the Z direction to excise the element from the bulk film material after molding.

16. The method of claim 1, wherein trimming the element from the bulk film material further comprises using one of the following trimming techniques:

steel rule die cutting;

matched metal die cutting;

or laser cutting.

17. The method of claim 1, further comprising:

receiving an image over a computer network;

providing the image to a digital printer;

printing the image onto the bulk film material prior to molding the bulk film material.

19. The apparatus of claim 18, wherein the thermoplastic material comprises but is not limited to of one of the following:

a polycarbonate, acrylonitrile butadiene styrene, polyvinyl chloride (PVC), polypropylene, acrylic, celluloid,

20. The apparatus of claim 18, wherein the molded thermoplastic material has one or more of the following aesthetic characteristics:

clear, opaque, or colored.

21. The apparatus of claim 20, wherein the molded thermoplastic material has electronic circuitry printed thereon.

22. The apparatus of claim 18, wherein the protective case has a first member intended to cover and protect the first side of the product and a second member intended to cover and protect the second side of the product.

23. The apparatus of claim 21, wherein further comprising a second member, made of molded thermoplastic material, and designed to form-fit over the molded thermoplastic material having the electronic circuitry printed thereon for the purpose of protecting the electronic circuitry.