COURT ENJOINS TENDER FOR BANCROFT <BTV> Bancroft Convertible Fund said the U.S. District Court for the District of New Jersey issued a preliminary injunction, enjoining <Zico Investment Holding Inc's> tender offer for Bancroft. It said the Court order prevents Zico from buying any shares tendered to them during the offer, which began on Feb. 17, 1987. In the tender offer blocked by the Court, Zico offered to buy 500,000 shares, or about 22 pct of Bancroft's outstanding stock, for 30 dlrs a share. Previously, Zico had bought 965,000 Bancroft shares for 31 dlrs a share, giving it about 28 pct of the company. If the recent offer had gone through, the Zico would have owned slightly more than 50 pct of Bancroft's outstanding shares.