Method of making plywood and a product thereof

Claim 1

IN THE MANUFACTURE OF STABLE PATTERNED PLYWOOD PANEL MAKING USE OF A PRESS HAVING A HEATED CAUL PLATE THE OPERATING FACE OF WHICH IS PROVIDED WITH A PLURALITY OF SERIES OF SHORT, SPACED-PARALLEL, WEDGE-SHAPED TEETH, EACH OF SAID SERIES BEING SEPARATED FROM ADJACENT SERIES BY CHANNELS IN THE CAUL PLATE HAVING A DEPTH GREATER THAN THAT OF THE VALLEY PORTIONS BETWEEN THE TEETH AND EXTENDING ACROSS THE FACE OF THE CAUL PLATE SO AS TO COMMUNICATE WITH THE ATMOSPHERE EVEN WHEN THE TEETH OF THE CAUL PLATE ARE PRESSED INTO A VENEER SUFFICIENTLY TO OBSTRUCT THE VALLEYS BETWEEN THE TEETH; THE PROCESS WHICH COMPRISES ASSEMBLING A PLURALITY OF SUPERPOSED SHEETS OF VENEER, ONE FACING SHEET OF THE ASSEMBLY BEING A WET WOOD VENEER, WITH AN ADHESIVE INTERPOSED BETWEEN THE SHEETS, PRESSING SAID HEATED CAUL PLATE AGAINST SAID WET FACING VENEER WITH SUFFICIENT PRESSURE COMPLETELY TO EMBED THE TEETH OF THE CAUL PLATE IN THE WET VENEER AND TO PRESS SAID VALLEY PORTIONS BETWEEN THE TEETH DIRECTLY AGAINST THE FACE OF THE VENEER SO AS TO COMPRESS THE VENEER BENEATH THE VALLEY PORTIONS THEREBY TO CLOSE AND CAUSE THE DISAPPEARANCE OF ANY CHECKS AND SPLITS IN THE VENEER, RETAINING SAID HEAT AND PRESSURE UNTIL THE MOISTURE IN THE VENEER HAS VENTED ITSELF THROUGH THE CHANNELS IN THE CAUL PLATE AND THE ADHESIVE HAS SET, THEN RELEASING THE PRESSURE.