IP Library Granted Patent US 9,522,508
Granted Patent B2
US 9,522,508 · App. 14/358,122 · Granted Dec 20, 2016

Plural blow utilization of counter stretch rod and/or base pushup

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Quick Facts
Patent No.
US 9,522,508
App. No.
14/358,122
Granted
Dec 20, 2016
Kind
B2
Abstract

A molding system for molding a container includes a first blow mold operable for blow molding a first form of the container and a second blow mold operable for blow molding a second form of the container. The system further includes a counter stretch rod and/or a base pushup operable for reducing a height of the first form of the container before blow molding the second form of the container. A corresponding method of forming a container is also disclosed.

Claims (33)

1. A method of forming a container comprising:

blow molding a first form of the container to have a first height;

blow molding a second form of the container to have a second height that is less than the first height after blow molding the first form; and

reducing a height of the first form of the container before blow molding the second form of the container, reducing the height includes reducing the height of the first form from the first height to an intermediate height, the intermediate height being less than the first height and less than the second height;

wherein:

reducing the height of the first form includes reducing the height using at least one of a counter stretch rod and a base pushup that pushes a base of the first form toward an upper end of the first form;

blow molding the first form includes blow molding the first form in a first mold;

blow molding the second form includes blow molding the second form in a second mold; and

reducing the height of the first form occurs inside the first mold.

2. The method of claim 1 , wherein reducing the height of the first form includes reducing the height using both the counter stretch rod and the base pushup.

3. The method of claim 1 , further comprising heating the at least one of the counter stretch rod and the base pushup and wherein reducing the height of the first form includes reducing the height using the at least one of the heated counter stretch rod and the heated base pushup.

4. The method of claim 1 , wherein reducing the height of the first form includes reducing the height using the at least one of the counter stretch rod and the base pushup to form a surface of a base of the second form.

5. The method of claim 1 , wherein the second height is between approximately one percent to thirty percent (1%-30%) shorter than the first height.

6. The method of claim 1 , wherein the third height is at least two millimeters shorter than the second height.

7. The method of claim 1 , further comprising cooperatively holding a base of the container between a stretch rod and the counter stretch rod.

8. A molding system for molding a container comprising:

a first blow mold operable for blow molding a first form of the container;

a second blow mold operable for blow molding a second form of the container; and

at least one of a counter stretch rod and a base pushup operable for reducing a height of the first form of the container before blow molding the second form of the container by pushing a base of the first form towards an upper end of the first form;

wherein:

the first blow mold has a first height for forming the first form to the first height;

the second blow mold has a second height for forming the second form to the second height;

the at least one of the counter stretch rod and the base pushup is operable to reduce the height of the first form from the first height to an intermediate height, the intermediate height being less than the first height and less than the second height; and

the height of the first form is reduced from the first height to the intermediate height inside the first mold.

9. The molding system of claim 8 , further comprising a heater that heats the at least one of the counter stretch rod and the base pushup for heating the first form of the container while reducing the height of the first form of the container.

10. The molding system of claim 8 , wherein the at least one of the counter stretch rod and the base pushup is operable to form a surface of a base of the second form.

11. The molding system of claim 8 , wherein the at least one of the counter stretch rod and the base pushup is operable to reduce the height of the first form while the first form is located within the first mold.

12. The molding system of claim 8 , further comprising a stretch rod, the stretch rod and the counter stretch rod operable to cooperatively hold a base of the container therebetween.

13. A molding system for molding a container comprising:

a first blow mold configured for blow molding a first form of the container, the first blow mold has a first height for forming the first form to the first height;

a second blow mold configured for blow molding a second form of the container, the second blow mold has a second height for forming the second form to the second height; and

at least one of a counter stretch rod and a base pushup configured to push a base of the first form towards an upper end of the first form to reduce a height of the first form of the container to an intermediate height before blow molding the second form of the container, the intermediate height is less than the first height and less than the second height;

wherein the at least one of the counter stretch rod and the base pushup is configured to reduce the height of the first form while the first form is located within the first mold.

Assignments (4)
CHANGE OF NAME Recorded Mar 24, 2020
From: AMCOR RIGID PLASTICS USA, LLC
To: AMCOR RIGID PACKAGING USA, LLC
Reel/Frame 052217/0418 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 11, 2018
From: AMCOR GROUP GMBH
To: AMCOR RIGID PLASTICS USA, LLC
Reel/Frame 047215/0173 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 18, 2017
From: AMCOR LIMITED
To: AMCOR GROUP GMBH
Reel/Frame 043595/0444 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 16, 2014
From: WILSON, BRADLEY; BATES, PETER; BEUERLE, FREDERICK C.; LISCH, GEORGE DAVID; LUCHIES, REINHARD C.J.; MAST, LUKE A.
To: AMCOR LIMITED
Reel/Frame 032913/0232 →