Cooling sealed packages after hot filing and sealing
A method of sealing a foil liner to a hot-filled container includes the steps of aligning a liner engagement surface of a seal head with a liner sealing surface of the container when the container is in a first position, wherein at least a peripheral margin of the foil liner is disposed between the liner engagement and sealing surfaces of the seal head and the container, respectively; applying heat between the seal head and the container to heat and attach the foil liner and the sealing surface of the container, resulting in a sealed package; rotating the sealed package from the first position to a second position; and applying fluid onto at least a portion of the sealed package to cool a head space of the sealed package. The head space is disposed between an inner surface of the container and a product packaged in the sealed package.
1 . A method of sealing a foil liner to a hot-filled glass container, comprising:
aligning a liner engagement surface of a seal head with a liner sealing surface of the container when the container is in an upright position, wherein the liner sealing surface of the container is located above the base of the container, and wherein at least a peripheral margin of the foil liner is disposed between the liner engagement and sealing surfaces of the seal head and the container, respectively, wherein the liner engagement surface contacts the foil liner;
applying heat between the seal head and the container to heat and attach the foil liner and the liner sealing surface of the container, which results in a sealed package;
inverting the sealed package from the upright position to an inverted position, wherein the liner sealing surface of the container is below a base of the container prior to application of fluid onto an outer surface of the base of the container; and
applying fluid onto the outer surface of the base of the container to establish a vacuum within the sealed package and to cool a head space of the sealed package that is disposed between an inner surface of the base of the container and a product packaged in the sealed package.
2 . The method of claim 1 , wherein following the aligning step and before the step of applying heat, the method further comprises passing the fluid through one or more fluid paths in the seal head, out of the seal head, and towards the foil liner.
3 . The method of claim 1 , wherein following the step of applying heat and before the step of inverting the sealed package, the method further comprises separating the seal head from the sealed package.
4 . The method of claim 1 , wherein following the step of applying heat and before the step of inverting the sealed package, the method comprises applying the fluid to the foil liner to cool the foil liner and the head space of the sealed package that is disposed between the foil liner and the product packaged in the sealed package.
5 . The method of claim 4 , wherein the step of applying the fluid to the foil liner comprises applying the fluid for a period of 5 to 30 seconds.
6 . The method of claim 1 , wherein following the inverting step, the method further comprises pasteurizing an interior of the foil liner with the product packaged in the sealed package.
7 . The method of claim 6 , wherein the pasteurizing temperature is in a range of 60° C.-81° C.
8 . The method of claim 1 , wherein the step of applying fluid comprises applying the fluid for a period of 5 to 120 seconds to establish a vacuum within the sealed package.
9 . The method of claim 1 , wherein following the step of applying fluid, the method further comprises disposing the sealed package in a cooler.
10 . The method of claim 1 , wherein the applying heat step further comprises forming a bond between the foil liner and the liner sealing surface.
11 . The method of claim 1 , wherein the seal head applies a force to the foil liner, thereby creating a pressure on the foil liner.
12 . The method of claim 11 , wherein the seal head applies a force to the foil liner, thereby creating a pressure of 25-80 psi on the foil liner.
13 . The method of claim 1 , wherein the fluid applied to the outer surface of the base of the container is at a temperature of 1° C.-38° C. and at a flow rate of 0.1-1.0 gallons per minute.
14 . The method of claim 1 , further comprising:
hot-filling the container with a product at a temperature of 82° C.-93° C., prior to the aligning step.
15 . A method of sealing a foil liner to a hot-filled glass container, comprising:
aligning a liner engagement surface of a seal head with a liner sealing surface of the container when the container is in an upright position, wherein the liner sealing surface of the container is located above the base of the container, and wherein at least a peripheral margin of the foil liner is disposed between the liner engagement and sealing surfaces of the seal head and the container, respectively, wherein the liner engagement surface contacts the foil liner;
applying heat between the seal head and the container to heat and attach the foil liner and the liner sealing surface of the container, resulting in a sealed package;
separating the seal head from the sealed package;
applying fluid to the foil liner to cool the foil liner and a head space of the sealed package that is between the foil liner and a product packaged in the sealed package;
inverting the sealed package from the upright position to an inverted position prior to application of fluid onto an outer surface of the base of the container, wherein the inverted position comprises the liner sealing surface of the container being located below a base of the container; and
applying the fluid onto the outer surface of the base of the container to establish a vacuum within the sealed package and to cool the head space of the sealed package that is disposed between an inner surface of a base of the container and the product packaged in the sealed package.
16 . The method of claim 15 , wherein following the step of inverting the sealed package from the upright position to the inverted position and before the step of applying the fluid onto the base of the container to cool the head space of the container, the method further comprises pasteurizing an interior of the foil liner with the product packaged in the sealed package.
17 . The method of claim 15 , further comprising:
inverting the sealed package from the inverted position to the upright position; and
applying the fluid to the foil liner to cool the foil liner and the head space of the sealed package that is between the foil liner and the product packaged in the sealed package.
18 . The method of claim 17 , wherein the three steps of applying the fluid include applying the fluid for a period of 5 to 120 seconds, respectively.
19 . The method of claim 15 , wherein the applying heat step further comprises forming a bond between the foil liner and the liner sealing surface.
20 . A method of cooling a hot-filled, sealed package, including a foil liner sealed to a glass container, the method comprising the steps of:
a) applying a cooling fluid to the foil liner;
b) inverting the sealed package from an upright position to an inverted position prior to applying the cooling fluid step c); and
c) applying the cooling fluid to an outer surface of a base of the container to establish a vacuum within the sealed package and cool a head space of the sealed package that is disposed between an inner surface of the base of the container and a product packaged in the sealed package.
21 . The method of claim 20 , further comprising:
d) refrigerating the sealed package.
22 . The method of claim 20 , wherein step b) inverting the sealed package includes pasteurizing an interior of the foil liner with a product packaged in the sealed package.
23 . The method of claim 20 , wherein the method further includes a bond between the glass container and the foil liner.