<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000

<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   6-MOS                   9-MOS                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996             DEC-31-1996             DEC-31-1996
<PERIOD-END>                               JUN-30-1996             SEP-30-1996             DEC-31-1996
<CASH>                                          13,256                   6,004                   8,072
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                   26,558                  32,608                  34,120
<ALLOWANCES>                                     1,012                   1,074                   1,016
<INVENTORY>                                     14,161                  15,556                  13,302
<CURRENT-ASSETS>                                56,663                  57,227                  58,326
<PP&E>                                          75,164                  80,657                  82,843
<DEPRECIATION>                                  40,439                  41,678                  43,430
<TOTAL-ASSETS>                                 111,429                 120,091                 123,967
<CURRENT-LIABILITIES>                           28,638                  32,846                  31,137
<BONDS>                                         21,929                  19,139                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                           119                     119                     119
<OTHER-SE>                                      55,241                  62,302                  67,144
<TOTAL-LIABILITY-AND-EQUITY>                   111,429                 120,091                 123,967
<SALES>                                         82,661                 133,949                 190,939
<TOTAL-REVENUES>                                82,661                 133,949                 190,939
<CGS>                                           51,565                  82,484                 117,284
<TOTAL-COSTS>                                   21,077                  31,953                 162,222
<OTHER-EXPENSES>                                   106                     206                     700
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               1,138                   1,682                   2,139
<INCOME-PRETAX>                                  9,057                  18,040                  26,405
<INCOME-TAX>                                     3,464                   6,805                   9,937
<INCOME-CONTINUING>                              5,593                  11,235                  16,468
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     5,593                  11,235                  16,468
<EPS-PRIMARY>                                      .49                     .98                    1.44
<EPS-DILUTED>                                      .48                     .96                    1.40


</TABLE>