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| Portable room divider |
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Timber element and procedure for manufacturing a timber element
| Details |
Inventors: Saarelainen, Reino;
Assignee: Honkarakenne Oy (Jarvenpaa, FI)
Primary Examiner: Bray; W. Donald
Assistant Examiner:
Attorney, Agent or Firm: Merchant, Gould, Smith, Edell, Welter & Schmidt
The invention concerns a timber element and a procedure for manufacturing such a timber element. The timber element (14b) is composed of at least two heavy wooden blanks (2) fitted one upon the other and glued to each other by their substantially horizontal faces. As taught by the invention, each wooden blank (2) is provided on at least on horizontal face with a guiding recess (6; 6a, 6b) longitudinal to the wooden blank and vertical, for guiding the crackling to occur vertically. |
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DETAILED DESCRIPTION The object of the present invention is to disclose a novel timber element and a novel procedure for manufacturing such a timber element in which the drawbacks and problems discussed above can be substantially avoided.
The object of the invention is, in particular, to provide a timber element which is favourable in manufacturing cost and the manufacturing process of which is, furthermore, simple and reliable.
The timber element of the invention is composed of at least two heavy wooden blanks, or deals, fitted one upon the other and joined to each other by gluing at their substantially horizontal faces.
As taught by the invention, each wooden blank is provided on at least one horizontal face with a guiding recess, longitudinal to the wooden blank and substantially vertically directed, to the purpose of guiding the cracking to take place in a vertical direction.
The direction of any cracks that may appear in the wooden blank is likely to run towards said guiding recess because the crack distance is shortest in this particular direction, and this is therefore the direction in which the deformation stresses produced in the wood when it dries out are most advantageously discharged.
There may be just one guiding recess longitudinal to the wooden blank, or there may be several recesses side by side.
In an embodiment of the invention, said recess is formed of a plurality of short recesses disposed with a spacing on one line.
It is thus understood that the guiding recess may either be one coherent, straight recess with a length substantially equalling the length of the wooden blank, or a number of consecutive, short recesses in a line.
In an embodiment of the invention, the recess has a wedge-shaped cross-section.
Such a wedge-shaped, or conical, recess tapering in the inward direction from the surface of the wooden blank is a natural starting point for any crack which may come into being, whereby its guiding effect is likely to be better than that of any other shape of recess, e
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Screen Walls 
