Flexible, asbestos-free gasket material
First Claim
1. Non-asbestos flexible sheet material made by dewatering on a water-permeable conveyor a layer of aqueous slurry and compressing and drying the dewatering layer, the aqueous slurry employed being one that contains the following ingredients in the following proportions by dry weight:
- ball clay;
25-44%mica or chlorite;
25-40%graphite;
10-30%cellulose fibers;
3-15%synthetic nitrile rubber;
1-10%starch;
1-5%.
1 Assignment
0 Petitions
Accused Products
Abstract
Non-asbestos flexible sheet material suitable for use in gaskets for the exhaust manifold of an internal combustion engine is made by dewatering on a water-permeable conveyor a layer of aqueous slurry and compressing and drying the dewatered layer, the aqueous slurry employed being one that contains the following ingredients in the following proportions by dry weight:
ball clay: 25-44%
non-fibrous layer silicate: 25-40%
graphite: 10-30%
cellulose fibres: 3-15%
synthetic rubber: 1-10%
starch: 1-5%.
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Citations
3 Claims
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1. Non-asbestos flexible sheet material made by dewatering on a water-permeable conveyor a layer of aqueous slurry and compressing and drying the dewatering layer, the aqueous slurry employed being one that contains the following ingredients in the following proportions by dry weight:
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ball clay;
25-44%mica or chlorite;
25-40%graphite;
10-30%cellulose fibers;
3-15%synthetic nitrile rubber;
1-10%starch;
1-5%. - View Dependent Claims (2, 3)
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Specification
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- Resources
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Current AssigneeT&N Materials Research Limited
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Original AssigneeT&N Materials Research Limited
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InventorsMcKenzie, Noel C., Lancaster, Robert A., Hargreaves, Brian, Crabtree, John D.
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Primary Examiner(s)Schofer, Joseph L.
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Assistant Examiner(s)TESKIN, FRED M
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Application NumberUS06/549,441Time in Patent Office617 DaysField of Search524/35, 524/445, 524/47, 524/447, 524/449, 524/492, 524/606, 106/DIG. 3, 106/DIG. 4, 106/204, 501/95, 428/237, 428/283, 428/450, 428/454, 428/463, 428/464, 428/457, 277/227, 277/233, 277/234, 277/DIG. 6, 162/142, 162/164.1, 162/177, 162/181.7, 162/181.8, 162/181.9US Class Current428/450CPC Class CodesD21H 17/68 siliceous, e.g. claysF16J 15/122 generally parallel to the s...Y10S 106/03 MicaY10S 277/936 CompositeY10T 428/31699 Ester, halide or nitrile of...Y10T 428/31703 Next to cellulosic
