Patent ID: RE41347

Claim:
A method of joining veneers, in which a number of veneers to be joined are sequentially carried with intervals therebetween in a perpendicular direction to joining edges of the veneers such that said veneers are fed to pass a predetermined edge approaching position, each veneer having an upstream end edge and a downstream end edge, said veneers including a given veneer and preceding veneers on the downstream side of said given veneer, said method including the steps of: halting said feed of the veneers the moment when the upstream end edge of said given veneer reaches said predetermined edge approaching position, said veneers further including a succeeding veneer on the upstream of said predetermined edge approaching position; resuming the feed of said veneers when the downstream end edge of said succeeding veneer reaches said predetermined edge approaching position to abut against the upstream end edge of said given veneer; halting the feed of said veneers when the upstream end edge of said succeeding veneer reaches said predetermined edge approaching position; repeating the preceding steps whenever a further succeeding veneer is fed from the upstream side of said edge approaching position such that a group of such veneers having joining edges of adjoining veneers kept in close abutment against each other are subjected to an alternate halt and resumption of the feed; supplying an appropriate amount of adhesive material to a limited area between the joining edges of said adjoining veneers or on part of at least either one of upper and lower sides of the respective veneers at an appropriate period from the time when any one of said veneers starts to be carried from upstream of said predetermined edge approaching position to the time when the respective adjoining veneers are brought into the close abutment ; and applying an adhesion enhancing action to said adhesive material on each member of the group of veneers by adhesion enhancing means, wherein at least said step of applying the adhesion enhancing action is performed in an adhesion enhancing zone having a predetermined length and established on the downstream side of said edge approaching position, said adhesion enhancing means is moved to a position due above said joining edges of the adjoining veneers kept in close abutment against each other to come into synchronization with the feed and the halt thereof of said group of veneers to keep a positional relationship corresponding to said adhesive material for a predetermined period whether said group of veneers are being in motion or at a halt, said adhesion enhancing action is performed first on said joining edges of the adjoining veneers kept in close abutment against each other and thereafter, by moving said adhesion enhancing means in an upstream direction to work on next upstream ones sequentially, whereby said adhesion enhancing action is capable of being performed both while said veneers are being fed and the feed thereof is halted, wherein the veneers to be joined have different dimensions.