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                                State of Delaware

                                [STATE INSIGNIA]

                          Office of Secretary of State

                          -----------------------------

      I, MICHAEL HARKINS, SECRETARY OF STATE OF THE STATE OF DELAWARE DO HEREBY
CERTIFY THAT THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF
INCORPORATION OF RAMESOR, INC. FILED IN THIS OFFICE ON THE TWENTIETH DAY OF
JULY, A.D. 1990, AT 9 O'CLOCK A.M.

                              | | | | | | | | | |


                                       /s/ Michael Harkins
                                       ------------------------------------
                                       Michael Harkins, Secretary of State

                                                      AUTHENTICATION: | 2735489
                                                                DATE: 07/23/1990

  [SEAL OF DEPARTMENT OF STATE
OFFICE OF THE SECRETARY OF STATE
            DELAWARE]

      750201077               RECEIVED FOR RECORD
                               July 25 A.D. 1990
                              /s/ Michael T. Scuse
                                    RECORDER
                         $3.00 STATE DOCUMENT FEE PAID


                          CERTIFICATE OF INCORPORATION
                                       OF
                                  RAMESOR, INC.

                                   ----------

            The undersigned, a natural person, for the purpose of organizing a
corporation for conducting the business and promoting the purposes hereinafter
stated, under the provisions and subject to the requirements of the laws of the
State of Delaware (particularly Chapter 1, Title 8 of the Delaware Code and the
acts amendatory thereof and supplemental thereto, and known, identified and
referred to as the "General Corporation Law of the State of Delaware"), hereby
certifies that:

            FIRST: The name of the corporation (hereinafter called the
"corporation") is

                                  RAMESOR, INC.

            SECOND: The address, including street, number, city, and county, of
the registered office of the corporation in the State of Delaware is 32
Loockerman Square, Suite L-100, City of Dover, County of Kent; and the name of
the registered agent of the corporation in the State of Delaware is The
Prentice-Hall Corporation System, Inc.

            THIRD: The purpose of the corporation is to engage in any lawful act
or activity for which corporations may be organized under the General
Corporation Law of the State of Delaware.

            FOURTH: The total number of shares of stock which the corporation
shall have authority to issue is One Thousand (1,000). The par value of each of
such shares is One Dollar ($1.00). All such shares are of one class and are
shares of Common Stock.

            FIFTH: The name and the mailing address of the incorporator are as
follows:

     NAME                                MAILING ADDRESS

T. M. Bonovich                   32 Loockerman Square, Suite L-100 
                                 Dover, Delaware 19901

            SIXTH: The corporation is to have perpetual existence.

    STATE OF DELAWARE
   SECRETARY OF STATE
DIVISION OF CORPORATIONS
FILED 09:00 AM 07/20/1990
   150201077 - 2236587


            SEVENTH: Whenever a compromise or arrangement is proposed between
this corporation and its creditors or any class of them and/or between this
corporation and its stockholders or any class of them, any court of equitable
jurisdiction within the State of Delaware may, on the application in a summary
way of this corporation or of any creditor or stockholder thereof or on the
application of any receiver or receivers appointed for this corporation under
the provisions of section 291 of Title 8 of the Delaware Code order a meeting of
the creditors or class of creditors, and/or of the stockholders or class of
stockholders of this corporation, as the case may be, to be summoned in such
manner as the said court directs. If a majority in number representing
three-fourths in value of the creditors or class of creditors, and/or of the
stockholders or class of stockholders of this corporation, as the case may be,
agree to any compromise or arrangement and to any reorganization of this
corporation as consequence of such compromise or arrangement, the said
compromise or arrangement and the said reorganization shall, if sanctioned by
the court to which the said application has been made, be binding on all the
creditors or class of creditors, and/or on all the stockholders or class of
stockholders, of this corporation, as the case may be, and also on this
corporation.

            EIGHTH: For the management of the business and for the conduct of
the affairs of the corporation, and in further definition, limitation and
regulation of the powers of the corporation and of its directors and of its
stockholders or any class thereof, as the case may be, it is further provided:

            1. The management of the business and the conduct of the affairs of
      the corporation shall be vested in its Board of Directors. The number of
      directors which shall constitute the whole Board of Directors shall be
      fixed by, or in the manner provided in, the By-Laws. The phrase "whole
      Board" and the phrase "total number of directors" shall be deemed to have
      the same meaning, to wit, the total number of directors which the
      corporation would have if there were no vacancies. No election of
      directors need be by written ballot.

            2. After the original or other By-Laws of the corporation have been
      adopted, amended, or repealed, as the case may be, in accordance with the
      provisions of Section 109 of the General Corporation Law of the State of
      Delaware, and, after the corporation has received


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      any payment for any of its stock, the power to adopt, amend, or repeal the
      By-Laws of the corporation may be exercised by the Board of Directors of
      the corporation; provided, however, that any provision for the
      classification of directors of the corporation for staggered terms
      pursuant to the provisions of subsection (d) of Section 141 of the General
      Corporation Law of the State of Delaware shall be set forth in an initial
      By-Law or in a By-Law adopted by the stockholders entitled to vote of the
      corporation unless provisions for such classification shall be set forth
      in this certificate of incorporation.

            3. Whenever the corporation shall be authorized to issue only one
      class of stock, each outstanding share shall entitle the holder thereof to
      notice of, and the right to vote at, any meeting of stockholders. Whenever
      the corporation shall be authorized to issue more than one class of stock,
      no outstanding share of any class of stock which is denied voting power
      under the provisions of the certificate of incorporation shall entitle the
      holder thereof to the right to vote at any meeting of stockholders except
      as the provisions of paragraph (2) of subsection (b) of section 242 of the
      General Corporation Law of the State of Delaware shall otherwise require;
      provided, that no share of any such class which is otherwise denied voting
      power shall entitle the holder thereof to vote upon the increase or
      decrease in the number of authorized shares of said class.

            NINTH: The personal liability of the directors of the corporation is
hereby eliminated to the fullest extent permitted by paragraph (7) of subsection
(b) of Section 102 of the General Corporation Law of the State of Delaware, as
the same may be amended and supplemented.

            TENTH: The corporation shall, to the fullest extent permitted by
Section 145 of the General Corporation Law of the State of Delaware, as the same
may be amended and supplemented, indemnify any and all persons whom it shall
have power to indemnify under said section from and against any and all of the
expenses, liabilities or other matters referred to in or covered by said
section, and the indemnification provided for herein shall not be deemed
exclusive of any other rights to which those indemnified may be entitled under
any By-Law, agreement, vote of stockholders or disinterested directors or
otherwise, both as to action in his official capacity and as to action in


                                       -3-


another capacity while holding such office, and shall continue as to a person
who has ceased to be a director, officer, employee or agent and shall inure to
the benefit of the heirs, executors and administrators of such a person.

            ELEVENTH: From time to time any of the provisions of this
certificate of incorporation may be amended, altered or repealed, and other
provisions authorized by the laws of the State of Delaware at the time in force
may be added or inserted in the manner and at the time prescribed by said laws,
and all rights at any time conferred upon the stockholders of the corporation by
this certificate of incorporation are granted subject to the provisions of this
Article ELEVENTH.

Signed on July 20, 1990.


                                       /s/ T. M. Bonovich
                                       ----------------------------------
                                               T. M. Bonovich
                                               Incorporator


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