Container having a rolled rim, and method of making the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-001/02
B65D-001/26
B32B-001/08
출원번호
US-0410359
(2009-03-24)
등록번호
US-8920892
(2014-12-30)
발명자
/ 주소
Hernandez, Jeffery J.
출원인 / 주소
Pactiv LLC
대리인 / 주소
Baker Botts LLP
인용정보
피인용 횟수 :
2인용 특허 :
13
초록▼
A blank for a container having a rolled rim, comprising a hollow body of polyolefin material, having an open first end and an opposite second end with a sidewall extending between the first end and the second end, and a rim formed at the first end of the hollow body. The rim includes a flange extend
A blank for a container having a rolled rim, comprising a hollow body of polyolefin material, having an open first end and an opposite second end with a sidewall extending between the first end and the second end, and a rim formed at the first end of the hollow body. The rim includes a flange extending outwardly from the sidewall, the flange defining a flange thickness and having an inner portion proximate the sidewall and an outer portion opposite the inner portion. The rim further includes a skirt extending downwardly from the outer portion of the flange, the skirt defining a skirt thickness and having an upper portion proximate the flange and a lower portion opposite the upper portion, the flange thickness being greater than the skirt thickness.
대표청구항▼
1. A container having a rolled rim, comprising: a hollow body of a thermoformed sheet consisting essentially of unfoamed polyolefin material, having an open first end and an opposite second end with a sidewall extending between the first end and the second end;a rigid rolled rim formed of the unfoam
1. A container having a rolled rim, comprising: a hollow body of a thermoformed sheet consisting essentially of unfoamed polyolefin material, having an open first end and an opposite second end with a sidewall extending between the first end and the second end;a rigid rolled rim formed of the unfoamed polyolefin material at the first end of the hollow body, the rigid rolled rim including a flange extending outwardly from the sidewall, the flange defining a flange thickness and having an inner portion proximate the sidewall and an outer portion opposite the inner portion, the rigid rolled rim further including a skirt extending downwardly from the outer portion of the flange toward the sidewall, the skirt defining a skirt thickness and having an upper portion proximate the flange and a lower portion opposite the upper portion, the flange thickness being greater than the skirt thickness. 2. The container of claim 1, wherein the flange thickness is at least about twice the skirt thickness prior to being rolled. 3. The container of claim 1, wherein the skirt thickness varies between the upper portion and the lower portion prior to being rolled. 4. The container of claim 3, wherein the skirt thickness decreases from the upper portion to the lower portion. 5. The container of claim 4, wherein the skirt thickness decreases from the upper portion to the lower portion defining a taper, the taper is approximately 3 degrees from normal. 6. The container of claim 1, wherein the outer portion of the flange and the upper portion of the skirt form a joint therebetween prior to being rolled. 7. The container of claim 6, wherein the joint includes an upper surface having an outer radius and a lower surface having an inner radius, the outer radius being at least about twice the inner radius. 8. The container of claim 7, wherein the outer radius is approximately 0.033 inches and the inner radius is approximately 0.016 inches. 9. The container of claim 6, wherein the joint defines a hinge point between the skirt and the flange. 10. The container of claim 6, wherein the joint defines a joint thickness, the joint thickness is less than the flange thickness. 11. The container of claim 1, wherein the flange extends outward from the sidewall at approximately 90 degrees from the sidewall. 12. The container of claim 1, wherein the skirt extends at an angle of approximately 90 degrees from the flange prior to being rolled. 13. The container of claim 1, wherein the flange has a width between the inner portion and the outer portion of at least approximately 0.165 inches. 14. The container of claim 1, wherein the container is selected from: a cup, a plate, a bowl, and a lid. 15. The container of claim 1, wherein the second end is closed to define a bottom wall. 16. The container of claim 1, wherein the hollow body is a single piece. 17. A method for forming a container having a rolled rim, comprising: providing a thermoformable sheet consisting essentially of unfoamed polyolefin material;thermoforming the sheet of unfoamed polyolefin material to form a hollow body having an open first end and an opposite second end with a sidewall extending between the first end and the second end, and a rim formed at the first end of the hollow body, the rim including a flange extending outwardly from the sidewall, the flange defining a flange thickness and having an inner portion proximate the sidewall and an outer portion opposite the inner portion, the rim further including a skirt extending downwardly from the outer portion of the flange, the skirt defining a skirt thickness and having an upper portion proximate the flange and a lower portion opposite the upper portion, the flange thickness being greater than the skirt thickness; androlling the rim to form a rigid rolled rim along the open first end of the hollow body, wherein the skirt extends toward the sidewall after being rolled. 18. The method of claim 17, wherein the flange thickness is at least about twice the skirt thickness prior to being rolled. 19. The method of claim 17, wherein the skirt thickness varies between the upper portion and the lower portion prior to being rolled. 20. The method of claim 19, wherein the skirt thickness decreases from the upper portion to the lower portion. 21. The method of claim 20, wherein the skirt thickness decreases from the upper portion to the lower portion defining a taper, the taper is approximately 3 degrees from normal. 22. The method of claim 17, wherein the outer portion of the flange and the upper portion of the skirt form a joint therebetween prior to being rolled. 23. The method of claim 22, wherein the joint includes an upper surface having an outer radius and a lower surface having an inner radius, the outer fadius being at least about twice the inner radius. 24. The method of claim 23, wherein the outer radius is approximately 0.033 inches and the inner radius is approximately 0.016 inches. 25. The method of claim 22, wherein the joint defines a hinge point between the skirt and the flange. 26. The method of claim 22, wherein the joint defines a joint thickness, the joint thickness is less than the flange thickness. 27. The method of claim 17, wherein the flange extends outward from the sidewall at approximately 90 degrees from the sidewall. 28. The method of claim 17, wherein the skirt extends at an angle of approximately 90 degrees from the flange prior to being rolled. 29. The method of claim 17, wherein the flange has a width between the inner portion and the outer portion of at least approximately 0.165 inches. 30. The method of claim 17, wherein the container is selected from: a cup, a plate, a bowl, and a lid. 31. The method of claim 17, wherein the second end is closed to define a bottom wall. 32. The method of claim 17, wherein the hollow body is a single piece. 33. The container of claim 1, wherein the polyolefin material is selected from: polypropylene, high-density polyethylene, or blends thereof. 34. The method of claim 17, wherein the polyolefin material is selected from: polypropylene, high-density polyethylene, or blends thereof. 35. The container of claim 1, wherein the polyolefin material includes at least one of filler or additive. 36. The method of claim 17, wherein the polyolefin material includes at least one of filler or additive. 37. The container of claim 1, wherein the container is formed from a blank.
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이 특허에 인용된 특허 (13)
Edwards Bryant (Clarendon Hills IL), Apparatus for forming non-nestable containers.
Tang, Jainsheng; Cowan, David Allen; Piispanen, Dennis H.; Williams, Michael T., Foam containers and articles from coated thermoplastic resin particles and methods for forming.
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