Roberts Everett, 85, who was executive vice president of the Dairy and Food Industries Supply Association for 41 years before retiring in 1960, died of pneumonia Monday at Holy Cross Hospital in Silver Spring.

He became chief staff officer of the association, a trade group of firms that sell supplies and equipment to dairy processing industries, in 1919 when it was located in New York City. The Association moved to Washington in 1942.

Mr. Everett also helped organize some 50 machine tool and dairy industry expositions and trade shows over the years, held from Chicago to Atlantic City.

During World War II he helped coordinate the flow of stainless steel to the milk processing industry.

Following the war, he was a cofounder of Dairy Society International, which helped distribute dairy products overseas as part of the Food For Peace program.

He was a founding member of the National Association of Exhibition Managers, a life member of the American Society of Association Executives, and was a recipient of the Distinguished Service Award of the American Dairy Association.

Mr. Everett was born in Merrill, Mich., and reared in Kansas. He attended Oberlin College and was a 1915 graduate of Columbia University, where he earned a bachelor's degree in journalism.

He was a reporter with the Old New York Tribune and old New York World, was a magazine editor, served in the Army during World War I, and operated his own public relations firm before joining the Dairy and Food industries Supply Association.

His marriage to the former Evelyn Clay ended in divorce.

A former resident of the District, Mr. Everett had lived in Silver Spring since 1964.

He was a member of the National Press Club.

Survivors include his wife, Frieda Wyandt Everett of Silver Spring; a daughter of his first marriage, Helen E. Seaman of New York City; six grandchildren; eight great-grandchildren, and one great-great-grandchild.

The family suggests that expressions of sympathy be in the form of contributions to the Dairy Remembrance Scholarship Fund, 5530 Wisconsin Ave. Washington, D.C. 20015.