May 25, 1917 



Hardwood Record — Veneer & Panel Section 



29 



of import duties on veneers and panels. 



L. P. Groffman of the St. Louis Basket & Box Company, St. 

 Louis, will read a paper with the title "How To Order Veneers 

 and Panels." 



Clark Washburne of the Federal Reserve Bank of Chicago 

 will give a talk on "Trade Acceptances and Their Advantages as 

 Commercial Paper.*' 



I 



Letters from a Panel User 



ABOUT SANDING 

 Monroe, Mich., May 21. One of the most important opera- 

 tions in the panel and veneer plant is the sanding of the stock. 

 The operation of the sanding machine is too often regarded as 

 not being a scientific job, therefore every John, Bill or Hank who 

 happens to run out of work is put at running the machine. A 

 good sander operator will always get the best in quantity and 

 quality from his machine; but it is plain that he cannot get the 

 best unless a modern machine is used. Time saving, output rais- 

 ing, and accident preventing devices are embodied in the up-to- 

 date machines. 



Sanding is mostly a complication of adjustments. Get your 

 adjustments right and keep them so and you will get excellent 

 results. Of course, any operator of average intelligence can 

 learn how to make adjustments, but the point is to know^ w^hat 

 adjustments to make and when to make them. For instance, a 

 sander is not expected to do the work of the planer, though many 

 operators seem to think so. It is not uncommon to find panels 

 where the face veneer in spots has been sanded through to the 

 core stock. Good sanding can be obtained only \vhen the cut of 

 the drum and the pressure applied are well within the limits of 

 the possible cutting qualities of the paper. .Another important 

 point in regard to obtaining a smooth, even surface is to be 

 sure that the pressure on the idle rolls is never so hard but that 

 the roll can easily be held from revolving by holding with the 

 hand. 



Different woods require different sanding treatment. Very 

 hard, hard, medium, soft and very soft woods require peculiar 

 treatment. Again, hardness and weight vary together to a very 

 great extent. 



The dryness of the core stock, cross banding, face veneers, etc., 

 is an important factor in sanding. Every machine operator and 

 panel manufacturer knovi's or should know that stock that has not 

 been thoroughly dried will sand with fuzzy grain. 



Pressure rolls that are down too heavy will cause hollow^ places. 

 Rolls should be adjusted evenly, but this is not always easy, as 

 sometimes when new they catch. After running awhile they are 

 all right. If they are old the pressure locks may become worn, 

 and then the screws under the bottom lock should be tightened up. 

 The first roll on the feeding end of the machine should be ad- 

 justed first, and when this has been accomplished, proceed with 

 the next, and so on. 



There is a very aggravating defect which presents itself in panel 

 factories commonly called "snake." This is usually caused by 

 particles of dust, or other foreign matter, between the paper and 

 the felt. The paper should be kept tight, and in order to do this 

 the canvas must also be tight. 



Garnet is, of course, the best abrasive to be used in most panel 

 factories, especially on hardwoods. It seems to possess just the 

 right degree of strength, haidness and brittleness to cut the wood 

 fiber and to produce a good, smooth finish. 



Sandpaper has advanced in price. It seems to the writer, there- 

 fore, that every manufacturer should test his paper and choose 

 the best he can buy, quality and prices considered. There are 

 many makes of sandpaper, made out of different combinations of 

 materials, most of which are good. Low price does not alw^ays 

 determine a bargain. The wearing quality and grit will deter- 

 mine that. If there is evidence of moisture in the sandpaper, it 

 is a good idea to subject it to a comparatively high temperature 

 and dry it out. A. T. DEINZER. ( 



All Three of Us Will Be Benefited if You 



MAHOGANY 

 LUMBER 



About ten carloads 1" Xo. 1 Com., 

 also other thicknesses and grades of 



MEXICAN & HONDURAS 



MAHOGANY 



dry enough to put in a kiln 

 with safety. 



If at any time we can 

 serve you better by 

 telegraphing kindly 

 wire at our expense. 



We are carrying a nice stock of 

 SAWED \'EXEER, 1/8", 3/16" 

 and 1/4" ^Mexican : also several 

 MILLION feet of SLICED 

 1/24" and 1/28" Mahogan)-, and 

 AMERICAN WALNUT veneer 

 ranging from plain to highly 

 figured. May we send samples 

 to you? 



Huddleston-Marsh 

 Mahogany Company 



2254 Lumber Street 33 West 42nd Street 



CHICAGO NEW YORK CITY 



/ 



Mention HARDWOOD RECORD 



