Abrasive wheels
AssigneeEli Sandman Company
InventorsMichael A. Sandman, Bernard T. Loughlin
Life of this patent
Estimating the term…
Abstract
This invention relates to improved fabrics used in the reinforcement of resin-bonded abrasive wheels. The fabrics are characterized by a coating of a novolak resin essentially free of added crosslinking agents.
Claims19
A material or shape cut from said material used for the reinforcement of a resin-bonded abrasive wheel, said material or shape of a fabric coated or impregnated with a non-abrasive composition comprising a novolak phenolic resin essentially free of crosslinking agent.
A material or shape used for the reinforcement of a resin-bonded abrasive wheel, said material or shape comprising open-weave glass fabric having been coated or impregnated with a non-abrasive composition of a novolak phenolic resin essentially free of added crosslinking agent.
A process for making a material or shape useful for the reinforcement of a resin-bonded abrasive wheel, said process comprising the steps of coating a fabric with a varnish comprising a non-abrasive composition of a novolak phenolic resin dissolved in a solvent essentially free of added crosslinking agent and drying said varnish to remove said solvent.
A resin-bonded abrasive wheel comprising a reinforcing layer of a fabric coated or impregnated with a non-abrasive composition of a novolak phenolic resin essentially free of crosslinking agent and an abrasive layer comprised of abrasive material and a resinous binder.
A process for making a resin-bonded abrasive wheel, said process comprising:
- coating a fabric with a varnish comprising a non-abrasive composition of a novolak phenolic resin essentially free of added crosslinking agent dissolved in a solvent;
- drying the varnish coated fabric to remove said solvent;
- placing a layer of the dried varnish coated fabric in a mold;
- placing a layer comprised of abrasive material and a resinous binder in the mold;
- pressing the layers in the mold under sufficient pressure to form a composite;
- and
- curing the composite to form said abrasive wheel.
Dependencies are inferred from the claim text.