Device for cutting according to a saw tooth pattern the extremities of veneer tapes between two pairs of upper and under knives

A device for cutting, according to a saw tooth pattern, the extremities of veneer tapes between two pairs of upper and under knives and for gluing those extremities under pressure by using a sledge which pulls an adhesive tape transversely with respect to the extremities of the veneer tapes, a pressure beam over which the extremities of the veneer tapes and the adhesive layers are disposed and on which the necessary pressure is applied by a hammer of an oscillable press and which, for that purpose, is beared in a vertically displaceable bridge, which is movable with respect to a fixed ground plate by the action of two pairs of arms which are kinematically connected to each other, one of the said arms being driven by a pneumatic cylinder, characterized in that the device comprises the following elements:

• (a) a means for locking the hammer of said press with respect to said bridge in such a manner that by a downward movement of the bridge the hammer comes into contact with the extremities of the veneer tapes and the adhesive tape resting on the pressure beam;
• (b) under and upper knives, the upper knives being attached to the vertically displaceable bridge wherein one of the upper knives extends below the bridge to a greater extent than the other upper knife such that the upper knives cut the veneer tapes at slightly different times, and wherein the upper knives are adjusted at different heights so that they do not come into contact with the under knives when said hammer pushes on the veneer tapes to be glued;
• (c) means for bringing said hammer to its resting position when it is unlocked with respect to said bridge;
• (d) a hydraulic cylinder for pulling down said bridge;
• (e) means for overcoming the pressure exerted by springs on the under knives.