Method for reforming a portion of a plastic container to include a transferable element, and the resulting container

• US 8,257,636 B2
• Filed: 09/10/2009
• Issued: 09/04/2012
• Est. Priority Date: 12/02/2004
• Status: Expired due to Fees

• Current Assignee: Graham Packaging Company LP (Graeme Richard Hart, MBA)
• Original Assignee: Graham Packaging Company LP (Graeme Richard Hart, MBA)
• Inventors: Oconnell, Patrick Matthew, Chisholm, Brian J.
• Primary Examiner(s): Davis, Robert B
• Application Number:
  US12/556,709
• Publication Number:
  US 20100000959A1
• Time in Patent Office: 1,090 Days
• Field of Search: 264/296, 264/327, 264/339, 264/509, 264/516
• US Class Current: 264/339
• CPC Class Codes: B29B 13/025 Tube ends
• CPC Class Codes: B29C 35/0805 using electromagnetic radiation
• CPC Class Codes: B29C 49/00 Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
• CPC Class Codes: B29C 57/00 Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor , e.g. collapsible mandrels
• CPC Class Codes: B29C 57/12 Rim rolling
• CPC Class Codes: B29C 59/021 of profiled articles, e.g. hollow or tubular articles, beams
• CPC Class Codes: Y10T 428/1352 Polymer or resin containing [i.e., natural or synthetic]

Abstract

A method and apparatus for reforming a portion of a blow molded plastic container includes directing energy from a heater onto the portion of the container so as to heat the portion while leaving the remainder of the container relatively unheated. The heated portion of the container is then engaged by a reforming tool having an embossed or imprinted characteristic on a contact surface of the reforming tool so as to reform the portion of the container and form a three-dimensional feature thereon which is not reproducible without using the method and/or apparatus of the present invention. Alternatively, the heated portion of the container is engaged by a reforming tool having a transferable element on a contact surface of the reforming tool so as to reform the portion of the container and transfer the transferable element to the portion of the container.

Claims

1. A method of reforming a portion of a plastic container, comprising:

providing a previously formed and cooled plastic container having a smaller upper portion and a larger remainder;

directing energy from a heater onto only the upper portion of the container to heat the upper portion, the remainder of the container remaining relatively unheated;

contacting the upper portion of the container with a contact surface of first and second reforming tools, the contact surface having at least one embossed or imprinted characteristic or at least one transferable element and the first and second reforming tools being spaced apart from the heater and defining a cavity receiving the upper portion of the container after the upper portion has been heated;

only the heated upper portion between the first and second reforming tools to eliminate manufacturing imperfections on the upper portion of the container, to reform the upper portion of the container, and to transfer to the upper portion of the container the at least one embossed or imprinted characteristic or at least one transferable element; and

removing the reforming tools from the upper portion of the container, wherein manufacturing imperfections have been eliminated from the upper portion of the container, the upper portion of the container has been reformed, and the upper portion of the container includes the at least one embossed or imprinted characteristic or at least one transferable element.

2. The method set forth in claim 1, wherein the energy from the heater heats the upper portion of the container to its softening temperature.

3. The method set forth in claim 1, wherein the heater is a non-contact heater such that the heater heats the upper portion of the container via one or both of radiation and convection heating, and not by physical contact with the upper portion.

4. The method set forth in claim 1, wherein the reforming tools are substantially unheated to simultaneously reform and cool the upper portion of the container upon contact.

5. The method set forth in claim 1, wherein the at least one transferable element is a design, a pattern, a series of letters, or a series of numbers.

6. The method set forth in claim 1, wherein the upper portion of the container is a neck finish end portion.

7. The method set forth in claim 1, wherein the at least one transferable element is a radio frequency identification device.

8. The method set forth in claim 1, wherein the at least one transferable element is a decorative particle.

9. The method set forth in claim 1, further comprising the step of controlling the intensity of the heater.

10. The method set forth in claim 1, further comprising the step of controlling the dwell time of the container adjacent to the heater.

11. The method set forth in claim 7, further comprising the step of tracking the container having the radio frequency identification device.

12. The method set forth in claim 1, further comprising the step of providing an air gap extending from the contact surface to vent air from between the contact surface and the upper portion of the container.

13. The method set forth in claim 1, further comprising the step of providing a chiller coupled to the reforming tools for cooling the contact surface of the reforming tools.

14. The method set forth in claim 13, further comprising the step of providing a pump for circulating liquid coolant through the reforming tools.

15. The method set forth in claim 3, further comprising the step of providing a heater selected from the group consisting of an infrared lamp, a radiant heater, a quartz lamp, focused light energy, laser energy, and a heated tool.

16. A method of reforming a portion of a plastic container, comprising:

providing a previously formed and cooled plastic container having a smaller upper portion and a larger remainder;

directing energy from a heater onto only the upper portion of the container to heat the upper portion, the remainder of the container remaining relatively unheated;

contacting the upper portion of the container with a contact surface of first and second reforming tools, the contact surface having at least one embossed or imprinted characteristic or at least one transferable element and the first and second reforming tools being spaced apart from the heater and defining a cavity receiving the upper portion of the container after the upper portion has been heated;

cooling the contact surface of the reforming tools;

compressing only the heated upper portion between the first and second reforming tools to eliminate manufacturing imperfections on the upper portion of the container, to reform the upper portion of the container, and to transfer to the upper portion of the container the at least one embossed or imprinted characteristic or at least one transferable element;

venting air from between the contact surface and the upper portion of the container via an air gap extending from the contact surface; and

removing the reforming tools from the upper portion of the container, wherein manufacturing imperfections have been eliminated from the upper portion of the container, the upper portion of the container has been reformed, and the upper portion of the container includes the at least one embossed or imprinted characteristic or at least one transferable element.

17. A method of reforming a portion of a plastic container, comprising:

providing a previously formed and cooled plastic container having a smaller upper portion and a larger remainder;

directing energy from a heater onto only the upper portion of the container to heat the upper portion, the remainder of the container remaining relatively unheated;

contacting the upper portion of the container with a contact surface of first and second reforming tools, the contact surface having at least one embossed or imprinted characteristic or at least one transferable element and the first and second reforming tools being spaced apart from the heater and defining a cavity receiving the upper portion of the container after the upper portion has been heated;

cooling the contact surface of the reforming tools using a chiller reducing the temperature of a coolant and a pump circulating the coolant through the chiller and to the reforming tools;

controlling the coolant temperature;

compressing only the heated upper portion between the first and second reforming tools to eliminate manufacturing imperfections on the upper portion of the container, to reform the upper portion of the container, and to transfer to the upper portion of the container the at least one embossed or imprinted characteristic or at least one transferable element;

venting air from between the contact surface and the upper portion of the container via an air gap extending from the contact surface; and

removing the reforming tools from the upper portion of the container, wherein manufacturing imperfections have been eliminated from the upper portion of the container, the upper portion of the container has been reformed, and the upper portion of the container includes the at least one embossed or imprinted characteristic or at least one transferable element.