REXHAM <RXH> GETS TAKEOVER OFFER Rexham Corp, a maker of packaging materials and machinery, said it received an unsolicited offer of 43 dlrs a share from Nortek Inc <NTK>. Nortek, a Providence, R.I., textile manufacturer, has disclosed it holds 381,050 Rexham shares, or about 9.1 pct of the outstanding, the company said. Rexham said it does not welcome the proposal but added its board will study the offer and respond in due course. Nortek has proposed paying half cash and half Nortek convertible preferred stock for Rexham, which has about 4.2 mln shares outstanding. The cash portion would include the amount previously paid for the Rexham stake and the terms of the convertible preferred stock would be negotiated, the company said. Rexham said it received the takeover offer in a letter from Nortek.