Methods of manufacturing tamper-resistant and tamper evident containers

  • US 9,527,640 B2
  • Filed: 06/20/2014
  • Issued: 12/27/2016
  • Est. Priority Date: 07/21/2003
  • Status: Active Grant
First Claim
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1. A method of thermoforming a tamper-resistant/tamper-evident container comprising:

  • forming a cover portion from a portion of a single sheet of at least partially transparent plastic material, wherein the cover portion includes an outwardly extending peripheral flange;

    forming a base portion from a portion of the single sheet including an upper peripheral rim and a skirt depending downwardly therefrom, wherein, when the container is closed, the outwardly extending peripheral flange of the cover portion abuts the upper peripheral rim of the base portion and the upper peripheral rim of the base portion extends beyond an outer edge of the outwardly extending peripheral flange of the cover portion substantially about the perimeter of the container;

    forming a hinge from a portion of the single sheet joining the cover portion and the base portion such that the vertical height of the hinge correlates with the height of the skirt that depends downwardly from the base portion when the height of the skirt is substantially uniform around the perimeter of the container; and

    forming at least one line of weakness in the hinge, and wherein the at least one line of weakness is formed in a manner that the line of weakness is severed to facilitate removal of the cover portion from the base portion to open the container, wherein the cover portion, base portion, hinge and at least one line of weakness are formed from the single sheet of at least partially transparent plastic material.

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