UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 4)*

                           Paragon Technologies, Inc.
                                (Name of Issuer)

                          Common Stock, Par Value $1.00
                         (Title of Class of Securities)

                                    69912T108
                                 (CUSIP Number)

                                December 31, 2004
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

      |X|   Rule 13d-1(b)

      |_|   Rule 13d-1(c)

      |_|   Rule 13d-1(d)

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).


                                  SCHEDULE 13G

--------------------------------------------------------------------------------
CUSIP No.                             69912T108                Page 2 of 4 Pages
--------------------------------------------------------------------------------
1     NAME OF REPORTING PERSON
      SS. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Emerald Advisers, Inc.
--------------------------------------------------------------------------------

2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
      (a) |_|
      (b) |_|

--------------------------------------------------------------------------------
3     SEC USE ONLY

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

4     CITIZENSHIP OR PLACE OF ORGANIZATION

      Pennsylvania
--------------------------------------------------------------------------------
                       5     SOLE VOTING POWER
  NUMBER OF SHARES
 BENEFICIALLY OWNED          773,290 shares
 BY EACH REPORTING     ---------------------------------------------------------
    PERSON WITH        6     SHARED VOTING POWER

                             0 shares
                       ---------------------------------------------------------
                       7     SOLE DISPOSITIVE POWER

                             1,290,140 shares
                       ---------------------------------------------------------
                       8     SHARED DISPOSITIVE POWER

                             0 shares
--------------------------------------------------------------------------------
9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      1,290,140 shares
--------------------------------------------------------------------------------

10    CHECK IF THE  AGGREGATE  AMOUNT IN ROW (9)  EXCLUDES  CERTAIN  SHARES
      (See Instructions)

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

11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      30.29%
--------------------------------------------------------------------------------

12    TYPE OF REPORTING PERSON (See Instructions)

      IA
--------------------------------------------------------------------------------

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SCHEDULE 13G                                                         PAGE 3 OF 4

ITEM 1.

(a)      The name of the issuer is Paragon Technologies, Inc.

(b)      The address of the issuer's  principal  executive office is 600 Kuebler
         Road, Easton, Pennsylvania 18040.

ITEM 2.

(a)      The name of the person filing is Emerald Advisers, Inc.

(b)      The address of the principal office of the person filing is 1703 Oregon
         Pike, Suite 101, Lancaster, Pennsylvania 17601.

(c)      The state of organization is Pennsylvania.

(d)      The title of class of security is common stock, par value $1.00.

(e)      The CUSIP number is 69912T108.

ITEM 3.

The person filing is an Investment  Adviser  registered under Section 203 of the
Investment Advisers Act of 1940.

ITEM 4.

(a)      The amount beneficially owned is 1,290,140 shares.

(b)      The percent of class is 30.29%  based on  4,260,360  shares  issued and
         outstanding  as of November 5, 2004 as  reported in the  Issuer's  Form
         10-Q for the period ended September 30, 2004.

(c)(i)   The number of shares as to which Emerald Advisers, Inc. has sole voting
         power is 773,290.

(c)(ii)  The  number of shares as to which  Emerald  Advisers,  Inc.  has shared
         voting power is 0.

(c)(iii) The  number of  shares  as to which  Emerald  Advisers,  Inc.  has sole
         dispositive power is 1,290,140.

(c)(iv)  The  number of shares as to which  Emerald  Advisers,  Inc.  has shared
         dispositive power is 0.

ITEM 5.

This  statement is NOT being filed to report the fact that as of the date hereof
the  reporting  person has ceased to be the  beneficial  owner of more than five
percent of the class of securities. [CONFIRM]


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SCHEDULE 13G                                                         PAGE 4 OF 4

ITEM 6.

Other  persons have the right to receive  and/or the power to direct the receipt
of dividends from, or the proceeds from the sale of, such securities.

ITEM 7.

Not applicable. [CONFIRM]

ITEM 8.

Not applicable. [CONFIRM]

ITEM 9.

Not applicable. [CONFIRM]

ITEM 10.

By signing  below,  I certify that, to the best of my knowledge and belief,  the
securities  referred to above were acquired and are held in the ordinary  course
of business  and were not  acquired  and are not held for the purpose of or with
the  effect  of  changing  or  influencing  the  control  of the  issuer of such
securities  and were not  acquired and are not held in  connection  with or as a
participant in any transaction having that purpose or effect.

                                   SIGNATURE

After  reasonable  inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

                                        January 11, 2005
                                        ------------------------------
                                        Date

                                        /s/ Kenneth G. Mertz II
                                        ------------------------------
                                        Signature

                                        Kenneth G. Mertz II, President
                                        ------------------------------
                                        Name/Title


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