APPARATUS AND METHOD FOR INTERLEAVING POLYMERIC ROLL FOR GAS IMPREGNATION AND SOLID-STATE FOAM PROCESSING
First Claim
1. An interleaving apparatus for making an interleaved cylindrical roll, comprising:
- a first rotatable platform for unwinding a first cylindrical roll of a first sheet material, the first rotatable platform being rotatable about a first central axis;
a second rotatable platform for unwinding a second cylindrical roll of a second sheet material, the second rotatable platform being rotatable about a second central axis; and
a third rotatable platform for winding, while the first and second sheet materials are unwinding, the first sheet material together with the second sheet material to yield the interleaved cylindrical roll, the third rotatable platform being rotatable about a third vertically-oriented axis and proximate to the first and second rotatable platforms.
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Accused Products
Abstract
The present invention relates to apparatuses and methods for making interleaved cylindrical rolls from a polymer roll and a porous roll. The interleaved rolls disclosed herein are useful for subsequent high pressure gas impregnation and solid-state foam processing. In one embodiment, an interleaving apparatus comprises: a first rotatable platform for unwinding a first cylindrical roll of a first sheet material, the first rotatable platform being rotatable about a first central axis; a second rotatable platform for unwinding a second cylindrical roll of a second sheet material, the second rotatable platform being rotatable about a second central axis; and a third rotatable platform for winding, while the first and second materials are unwinding, the first sheet material together with the second sheet material to yield the interleaved cylindrical roll, the third rotatable platform being rotatable about a third axis and proximate to the first and second rotatable platforms.
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Citations
20 Claims
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1. An interleaving apparatus for making an interleaved cylindrical roll, comprising:
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a first rotatable platform for unwinding a first cylindrical roll of a first sheet material, the first rotatable platform being rotatable about a first central axis; a second rotatable platform for unwinding a second cylindrical roll of a second sheet material, the second rotatable platform being rotatable about a second central axis; and a third rotatable platform for winding, while the first and second sheet materials are unwinding, the first sheet material together with the second sheet material to yield the interleaved cylindrical roll, the third rotatable platform being rotatable about a third vertically-oriented axis and proximate to the first and second rotatable platforms. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for making an interleaved cylindrical roll, comprising at least the steps of:
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unwinding a first cylindrical roll of a first polymer film material; unwinding a second cylindrical roll of a second porous gas permeable sheet material; and interleaving together the first polymer film material with the second porous gas permeable sheet material under zero or near tension, while the first and second sheet materials are unwinding, to yield the interleaved cylindrical roll. - View Dependent Claims (9, 10, 11, 12)
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13. An interleaved cylindrical roll, comprising:
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a first polymer film evenly wound about a central axis defining a first Archimedean spiral having a plurality of first spiral turns; and a second porous gas permeable material sheet evenly wound about the central axis and interleaved with the first polymer film thereby defining a second Archimedean spiral having a plurality of second spiral turns; characterized in that the spacing between each of the plurality of first and second turns is essentially constant across all diameters of the interleaved cylindrical roll. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification