Jointing Veneers

The trimming and jointing of narrow veneers to form larger panels is done by special saws or power-operated guillotines in production-work, but knife cutting by hand is rarely satisfactory and the veneers should be worked as in jointing narrow boards. Single leaves can be planed up on the shooting-board (293:1) if adequately supported as shown, or a pack of veneers can be cramped/clamped between two wood straight-edges and either held in the vice (288) or passed over the jointer. If the veneer edges tend to splinter out or crumble they can be supported with strips of adhesive tape while they are being planed. After planing, the edges

288 Planing edges of veneers

289 Taping veneers

289 Taping veneers are taped together with adhesive tape, with a final strip along the entire length of the joint (289), and while gummed paper tape is normally used, clear cellulose tape has very definite advantages, even though it is more expensive, for the joints can be examined for tightness against the light and the tape is more easily peeled off after pressing. Tape-splicers in production-work apply mechanical methods to the same principle, and the two leaves of veneer are pushed together by angled rollers while a continuous strip of gummed paper tape is wetted and pressed down by a front roller. With tapeless splicers the veneer edges are first coated with a mixture of hide glue and formaldehyde and allowed to dry. A heated roller in the splicer then liquefies and sets the glue as the two edges are fed together, with sufficient strength of bond which enables the veneers to be handled as a single sheet.

Homemade Mechanical Guillotine
290 Hand-operated veneer-guillotine. (By courtesy of Interwood Ltd)
291 Automatic veneer-splicer. (By courtesy of Interwood Ltd)
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