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06 July, 2005


Thursday, July 6, 2005                                     Rich Sheffer      (952) 887-3753




MINNEAPOLIS, MN – July 6, 2005 – Donaldson Company, Inc. (NYSE:DCI), a leading worldwide manufacturer of filtration systems, and Hollingsworth & Vose ("H&V"), a global supplier of filtration media and specialty paper products based in East Walpole, MA, announced today that they have entered into a global patent license agreement covering Donaldson's Ultra-Web® nanofiber media technology for use in pleated on-road filters.


"H&V's global access to other filter manufacturers, combined with our patents, will accelerate the market acceptance of nanofiber filtration products," said Bill Cook, Donaldson's President and Chief Executive Officer.  "Donaldson now has more than 80 issued and pending U.S. and international patents covering our nanofiber technology, and we are pleased that H&V will be able take advantage of several of these patents."


"We know from several years of technical development and commercial experience that nanofiber filter products can provide increased filtration efficiency and extended filter life, with almost no loss of airflow compared to conventional filters," commented Cary Olson, Donaldson's General Manager of Air Filtration.  "This performance provides customers with better engine protection and longer filter life.  We're excited to license these patents to H&V so they can commercialize these products in markets that Donaldson doesn't fully serve."



About Donaldson Company

Donaldson is a leading worldwide provider of filtration systems and replacement parts.  Donaldson is a technology-driven company committed to satisfying customer needs for filtration solutions through innovative research and development.  Donaldson serves customers in the industrial and diesel engine markets including in-plant air cleaning, compressed air and gas purification, power generation, disk drive filtration, off-road equipment and trucks.  Our 10,000 employees contribute to the company's success at over 30 manufacturing locations around the world.  Donaldson is a member of the S&P MidCap 400 Index and Donaldson shares are traded on the NYSE under the symbol DCI.  Additional company information is available at



Donaldson's Safe Harbor Statement

The company desires to take advantage of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995 (the "Act") and is making this cautionary statement in connection with such safe harbor legislation.  This earnings release, the Annual Report to Shareholders, any Form 10-K, 10-Q or Form 8-K of the company or any other written or oral statements made by or on behalf of the company may include forward-looking statements, forecasts and projections which reflect the company's current views with respect to future events and financial performance but involve uncertainties that could significantly impact results.  The words "believe," "expect," "anticipate," "intends," "estimate," "forecast," "outlook," "plan," "promises," "project," "should," "will be" and similar expressions are intended to identify "forward-looking statements" within the meaning of the Act.


The company wishes to caution investors that any forward-looking statements are subject to uncertainties and other risk factors that could cause actual results to differ materially from such statements, including but not limited to risks associated with:  currency fluctuations, commodity prices, world economic factors, political factors, the company's substantial international operations, including production facilities in China, highly competitive markets, changes in capital spending levels by customers, changes in product demand, cancellations of orders, litigation, integration of acquisitions, facility and product line rationalization, research and development expenditures, including ongoing information technology improvements, and governmental laws and regulations, including diesel emissions controls.  For a more detailed explanation, see the company's 2004 Form 10-K filed with the Securities and Exchange Commission.  The company wishes to caution investors that new factors emerge from time to time, and it is not possible for management to predict all such factors, nor can it assess the impact of each such factor on the business or the extent to which any factor, or a combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements.  Investors are further cautioned not to place undue reliance on such forward-looking statements as they speak only to the company's views as of the date the statement is made.  The company undertakes no obligation to publicly update or revise any forward-looking statements.


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