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AssigneesSensormatic Electronics Corporation, Vacuumschmelse GmbH
InventorsGiselher Herzer, Thomas Hartmann, Ming-Ren Lian
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A thin metallic ferromagnetic alloy ribbon is annealed by continuously transporting it through an oven in order to induce specific magnetic characteristics and in order to remove a production-inherent longitudinal curvature of the ribbon. While the heat-treatment occurs, the ribbon is guided by a channel in a substantially straight annealing fixture. The channel is characterized by slight curvatures along portions of its length, in particular where the ribbon enters into the annealing oven. The curved channel provides an improved thermal contact between the ribbon and the heat reservoir. As a consequence the process can be conducted at particularly high annealing speeds without degrading the desired characteristics.
A method of annealing a thin metallic ribbon by passing the ribbon lengthwise on a path through a channel in a heat treatment fixture, in which along at least part of the channel protrusions extending transversely of the path cause the ribbon to wriggle and make multiple contacts with the heat treatment fixture, thereby making improved thermal contact with the heat treatment fixture.
A method of annealing a thin metallic ribbon by passing the ribbon lengthwise on a path through a lengthwise channel in a heat treatment fixture, in which the path curves along a curved section of the channel urging the ribbon into contact with the heat treatment fixture, thereby making improved thermal contact with the heat treatment fixture.
A heat treatment fixture for apparatus for annealing a thin metallic ribbon, comprising:
A heat treatment fixture for apparatus for annealing a thin metallic ribbon, comprising a lengthwise channel defining a path to receive ribbon lengthwise, the channel comprising at least one curved section in the channel such that the path is curved along at least part of its length.
A method of annealing a thin metallic ribbon by passing the ribbon lengthwise on a path through a channel in a heat treatment fixture, in which the path curves in one direction, followed by a curve in an opposed direction along at least a portion of the channel, urging the ribbon into contact with the heat treatment fixture, thereby making improved thermal contact with the heat treatment fixture.
A heat treatment fixture for apparatus for annealing a thin metallic ribbon, comprising:
A heat treatment fixture for apparatus for annealing a thin metallic ribbon, comprising a channel defining a path to receive ribbon lengthwise, the channel comprising at least one curved section in the channel such that the path is curved along at least part of its length;
Dependencies are inferred from the claim text.