| 摘要 |
<p>299,442. Sprucolite Corporation, ;Assignees of Ollesheimer, L. J.). Oct. 28, 1927, [Convention date]. Veneers.-In the production of laminated articles by submitting lavers of fibrous material such as wood coated with a binder, and preferably arranged with the grain of adjacent layers crossing, to pressure, the article is submitted to a pressure greater than that required to compress it to the desired extent until the binder has acquired an initial set : the pressure is reduced to the extent necessary to allow the article to expand to the desired size, and the pressure is maintained until the binder is permanently set. A stack of spruce boards P coated with a casein glue is mounted between metal beams B in a hydraulic press H. Pressure is applied to compress the stack from say 37 in. to 24 in., as shown in dotted lines. When the glue is partially set, the pressure is released to allow the stack to expand to 26 in. Clamps are put on the beams B and tightened to maintain this pressure, and the stack is removed from the press. By this process, the binder is said to penetrate into the pores of the wood, and the tendency to " spring back " is largely eliminated. Specification 299,441 is referred to.</p> |
