Papermakers' felt
First Claim
Patent Images
1. A papermaker'"'"'s felt for use with a paper-making machine comprising:
- a base layer of fabric formed into a belt, anda batt layer having a major portion of a discontinuous phase which includes fibers having a relatively high melting point, and a minor portion of a continuous phase which includes fusible material, said continuous phase also defining channels for the drainage of water, said fusible material having a melting point lower than the melting point of the fibers of said discontinuous phase and higher than the highest expected operating temperature of the papermaking machine, said fusible material fused to said fibers and said base layer.
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Accused Products
Abstract
A papermaker'"'"'s felt is formed by needling a compressible batt layer onto one or both sides of a base layer woven fabric. The batt layer is formed from a mixture of at least two types of fibers. A first type is present in much smaller quantities than the remainder and has a melting point at a temperature below the melting point of the remainder. The felt is heated to a temperature between the melting point of the first type of fibers and the remainder, so as to melt the first type such that it bonds the remainder together and to the base fabric. The felt is then formed into an endless belt.
61 Citations
13 Claims
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1. A papermaker'"'"'s felt for use with a paper-making machine comprising:
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a base layer of fabric formed into a belt, and a batt layer having a major portion of a discontinuous phase which includes fibers having a relatively high melting point, and a minor portion of a continuous phase which includes fusible material, said continuous phase also defining channels for the drainage of water, said fusible material having a melting point lower than the melting point of the fibers of said discontinuous phase and higher than the highest expected operating temperature of the papermaking machine, said fusible material fused to said fibers and said base layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. The method of making a papermaker'"'"'s felt for use with a papermaking machine comprising the steps of
forming a base layer from a fabric, forming a batt layer by utilizing a major portion of fibers having a relatively high melting point in combination with a minor portion of fusible material having a relatively low melting point, where said relatively low melting point is greater than the highest expected operating temperature of the papermaking machine, said fusible material being present in an amount sufficient to form a continuous phase, joining said batt layer to said base layer, heating said joined layers to a temperature below the melting point of said fibers and above the melting point of said fusible material, said fusible material fusing to itself, and fusing to said fibers and said base layer, thereby resulting in a batt layer having a fused continuous phase and a discontinuous fiber phase, said fused continuous phase also defining channels for the drainage of water, and forming the felt into a belt.
Specification