A Zanesville company is closing its doors. Custom Coil and Transformer company on Newark road will close August 2nd. Company president Marty Lucas says the operation is being consolidated into a Cleveland company called Transformer Engineering Corporation. Lucas says Custom Coil has 10 employees and a temporary worker. The comany manufactures transformers and serves many different markets including elevators, cable t-v, audio products and airport lighting. One of its bigger customers is Cooper Industries which had a plant in Zanesville. The company has been in operation since 1963 and has gone through three ownership changes.