Disclosed herein are drum shells and methods of forming drum shells with plies that are individually scarfed, or with combinations of plies that are scarfed separately from one or more other plies. In some embodiments, the radial location of the joints of the plies can be varied around the drum shell, resulting in the removal of an inherent weak point in traditionally formed drum shells where all plies have a joint at approximately the same radial position.

Disclosed herein are drum shells and methods of forming drum shells with plies that are individually scarfed, or with combinations of plies that are scarfed separately from one or more other plies. In some embodiments, the radial location of the joints of the plies can be varied around the drum shell, resulting in the removal of an inherent weak point in traditionally formed drum shells where all plies have a joint at approximately the same radial position.

Supporting tables 8, 9 for supporting both edges 90a, 90b of a veneer 90 are arranged when both edges 90a, 90b are scarfed using circular saws 40a, 41a. Supporting tables 8, 9 include pressing units 56, 57 for pressing both edges 90a, 90b, circular saw contacting sections 54, 55 for receiving the circular saws 40a, 41a, and auxiliary conveyors 60, 62 for transporting both edges 90a, 90b in a transporting direction TD. Pressing units 56, 57 are configured to press both edges 90a, 90b against at least the auxiliary conveyors 60, 62. Auxiliary conveyors 60, 62 are arranged adjacent to the circular saw contacting sections 54, 55. Both edges 90a, 90b transported in the transporting direction TD are pressed by the pressing units 56, 57, reducing a friction acting on both edges 90a, 90b in the direction opposite to the transporting direction TD.

Supporting tables 8, 9 for supporting both edges 90a, 90b of a veneer 90 are arranged when both edges 90a, 90b are scarfed using circular saws 40a, 41a. Supporting tables 8, 9 include pressing units 56, 57 for pressing both edges 90a, 90b, circular saw contacting sections 54, 55 for receiving the circular saws 40a, 41a, and auxiliary conveyors 60, 62 for transporting both edges 90a, 90b in a transporting direction TD. Pressing units 56, 57 are configured to press both edges 90a, 90b against at least the auxiliary conveyors 60, 62. Auxiliary conveyors 60, 62 are arranged adjacent to the circular saw contacting sections 54, 55. Both edges 90a, 90b transported in the transporting direction TD are pressed by the pressing units 56, 57, reducing a friction acting on both edges 90a, 90b in the direction opposite to the transporting direction TD.

The invention relates to a method and apparatus for activating an adhesive for composing veneers. A method for activating an adhesive for composing veneers according to an aspect of the invention comprises providing the adhesive on a surface of a veneer, and radiating the adhesive on the surface of the veneer. The method may comprise providing a reinforcing material on the adhesive; or providing an adhesive tape on the surface of the veneer, wherein the adhesive tape comprises adhesive coated or impregnated with a reinforcing material. The method may further comprise radiating the adhesive between the surface of the veneer and the reinforcing material.

A veneer peeling apparatus includes a bearing frame (10) for rotatably supporting a round wood (20), a peeling blade (24) which can be placed against the periphery of the round wood, and at least one milling head (40) for scarfing at least one edge of the veneer, wherein the milling head (40) includes a groove milling cutter (44) for trimming the veneer.

A veneer peeling apparatus includes a bearing frame (10) for rotatably supporting a round wood (20), a peeling blade (24) which can be placed against the periphery of the round wood, and at least one milling head (40) for scarfing at least one edge of the veneer, wherein the milling head (40) includes a groove milling cutter (44) for trimming the veneer.

An embryo loading device for receiving and rolling first and second veneer sheets and joining the first and second veneer sheets to each other each other, including: a sliding table (2); a guide bar (2.1) provided on a top surface of the sliding table (2); a clutch gear wheel part (3) provided under the sliding table (2); a rolling wheel part (4) provided over the guide bar (2.1); and a pair of box-shaped frames (3T, 3P) housing the clutch gear wheel part (3).

An embryo loading device for receiving and rolling first and second veneer sheets and joining the first and second veneer sheets to each other each other, including: a sliding table (2); a guide bar (2.1) provided on a top surface of the sliding table (2); a clutch gear wheel part (3) provided under the sliding table (2); a rolling wheel part (4) provided over the guide bar (2.1); and a pair of box-shaped frames (3T, 3P) housing the clutch gear wheel part (3).

The present invention relates to an adhesive thread device for producing an adhesive thread, comprising a supply means for supplying an adhesive-free crude thread, an adhesive tank for receiving and storing an adhesive granulate, a main heater arranged at a lower portion of the adhesive tank to define an activation zone of the adhesive tank in which the adhesive granulate is surface-melted, a closed receptacle substantially horizontally arranged, which is arranged at the activation zone of the adhesive tank with a first end, wherein the closed receptacle comprises at least one inlet opening for supplying, and at least one outlet opening for withdrawing the crude thread, and wherein, when passing the crude thread through the closed receptacle, the crude thread is wetted with adhesive on its entire outer surface in an oxidation-free manner. Furthermore, the present invention relates to a device for joining workpieces as well as a method for producing an adhesive thread and a method for joining workpieces.