1890

The first framesaws delivered by Ahlström in Karhula

1930-1970

Framesaws dominate

1966

Plan-Sell Oy engineering works was established in Heinola

1966-1980

In addition to domestic deliveries eg over 100 sticker-stackers
and over 30 drysorters to the then USSR

the 1980's

Optimizing edgers become more common in the Finnish sawmills.
Plan-Sell and Ahlström united in sawmill machinery business.
Valmet’s lumber handling business and Bioneer's chipper business were acquired.

early 1990's

Several new saw lines to the Finnish sawmills at  the beginning of the decade. 1995 Troponor, later on Sorb Industri Ab acquired the company. Late 1990's market share of almost 100 % in sawmill chippers at the end of the decade.

The 21st century

Considerable plant deliveries to Russia, numerous plant modernisations in Finland; energy chippers playing a more significant role.