Cradle type multi-stem delimber

Multi-stem delinibing devices ma! rationalise processing of small-sized trees. Different tqpes of delimbing device are reviewed. Some basic feat~lreso f cradle delimbin %ere studied experiment a l l ) for Scots pine iPinus s~lvesirisL .) and Norila) spruce IPiceo tihs (Li ~arstsie parate- I). As standard for delimbing qualit). the proportion of branches cut hhorter than a specified value is proposed. Acceptable delimbing qualit! was detinrd in the \tudq as 75 per cent of tlie branches cut shorter than 25 mni. Efficienc! was nlrasured as the time required to achiexe the defined delimbing qualit!. Loss of steniwood mas mea5ured simultaneousl) with delimbing cffic~encq.T he delinibing process follo\\ed a n 3-shaped funct~on.h 'hen a bunch of trees first enters the cradle. little delmbing takes place. A period of fa~rlqr ap~dd eliniblng follo!vs. succeeded bq a period of decreasing efficiencq in the final atages. Acthe delimbing devtces.