| 摘要 |
<p>A wooden frame for window or door leaves is composed of frame pieces (3'), each one of which comprising a first part (8) facing outwards in a wall opening and a second part (9) facing inwards. The outer, first part (8) of the individual frame piece is delimited by two surfaces (13, 16) converging outwardly and at an acute angle relative to each other, said surfaces emanating from dividing cuts made in an initial log, said cuts extending radially from the area of the centre of the log. In that way, the annual rings in the wood material are orientated in such a way that imagined tangents to individual annual rings cut through said surfaces (13, 16) substantially perpendicularly to the planes of the surfaces and older annual rings being situated closest to the free, narrow edge of the part (8).</p> |
