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US 4,301,039 AGranted
Method of making a metal catalyst support
OwnerWilliam B. Retallickinventor
Life of this patent
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Abstract
The catalyst support is a spiral formed by winding a single strip of metal upon itself. Indentations in the strip maintain a uniform spacing between the layers in the spiral. The indentations are displayed along the strip in at least two different patterns. Different patterns are wound onto successive layers in the spiral so that the indentations in successive layers cannot coincide and nest together.
Claims12
A method of making a metal catalyst support, comprising the steps of:
- impressing a first pattern of indentations on a moving strip of metal while winding the strip on a rotating receiving means, the indentations being of uniform height so that the spacing between layers is equal to this height, and,
- intermittently impressing a second pattern of indentations on a portion of the strip which has not yet been wound on the receiving means, the indentation of the second pattern being of uniform height, whereby different patterns are wound onto successive layers of the catalyst support so that the indentations in successive layers cannot coincide and nest together.
A method of making a metal catalyst support, comprising the steps of:
- impressing a first pattern of indentations on a moving strip of metal while winding the strip on a rotating receiving means, the indentations being positioned such that there is a wider border along one side of the strip and a narrower border on the other side of the strip, and
- impressing a second pattern of indentations on the other side of the strip, such that the wide border of the first pattern corresponds to the narrow border of the second pattern, and the narrow border of the first pattern corresponds to the wide border of the second pattern, the indentations of both the first and second patterns being of uniform height so that the spacing between layers is equal to this height, and whereby different patterns are wound onto successive layers of the catalyst support so that the indentations in successive layers cannot coincide and nest together.
A method of making a metal catalyst support comprising the steps of:
- impressing a first pattern of indentations on a moving strip of metal while winding the strip on a rotating receiving means, the impressing being performed by passing the strip through a pair of intermeshing die wheels, the indentations being of uniform height so that the spacing between layers is equal to this height,
- stopping the strip,
- replacing the die wheels with a second set of die wheels, the second set of die wheels defining a second pattern, different from the first pattern, of indentations of uniform height, and
- re-starting the movement of the strip, whereby different patterns are wound onto successive layers of the catalyst support so that the indentations in successive layers cannot coincide and nest together.
1 more element
Dependencies are inferred from the claim text.