US938366A - Process of bending wood. - Google Patents

Description

E i i J. T. BREBCE.

PROCESS OF BBND'ING WOOD.

APPLICATION FILED MAY 9, 190s.

9385366, Patented 0@t.26,19o9.

SHEET MET/IAN marrnn sfrn'rns rafrnn'r orme f,

TOCESS OF BENDING WOOD. 935,366. speciation of Mmmm ratentefioet. 2e, ieee.

y this, they may be passed through a machine for this purpose, or it might be done by hand. Then the rim thus built-up is placed on the bending band 5 'of the machine. s the width of this bending band admits of it, er it is customary to place three of these bui tup rims thereon, side by side. Then o ver Appmauoxt'siea nay e, isos. v senti No. 431,321.

To all whom tt may concern:

Be it known that l, JOHN T. Bannon, a citizen of the United States, residing at Portsmouth, in the county of Scioto' an 5 State of Ohio, have invented certain new and useful Improvements in Processes o Bending Wood, of which the-following is a s ecification.

My invention relates to an improved processor method of bending wood, and it consists in an improved method or process o bending solid and built-up rims simultaneously by superimposing them and bending them around a common form with an interposed flexible medium or layer between the l solid and built-up rims.

My invention still further consists in an im roved method or process whereby a soli and a built-up rim are bent simultaneously with an interposed layer of material whic or lgalvanized iron, for instance.. On top, 65

7 are placed. These solid rims areffirst steamed for perhaps twenty or thirty minutes until they become thoroughly hotan saturated after the usual manner of pre- 7o The purpose of the lie'xible layer 6 is twofold. Primarily it is to prevent the moisture of the steamed rims passing to the built- `up rim as it is desirable to prevent any of 75 the moisture passing through the veneers. The secondary functionl of the flexible medium is to distribute and equalize strain upon the built-up rims w ich would not. be as erfectly distributed if the pressure were so a plied solely through the solid rims. hus aced together, the levers or bending arms 10, l0, of the machine are set in motion, an the layers are bent around the form ll, a ter which they are temporaril fastened in the S5 customary manner, and le t in this position for the usual length of time until the parts shall have taken a permanent set, when the rims are released and they are rea. y for the market. lhile it is perfectly feasible to 90 bend two superimposed solid rims in this fashion, and my improved method or procprevents moisture passing vfrom the solid rim to the built-up rim, which interpose layer has the secondary function of distributing and equalizing the strain an heat.

My invention still furthe'r consists in certain novel procedure, which will be hereinafter described and pointed out in the claims. In the accompanying drawings :,F'igure l is a diagrammatic view in side elevation illustrating the machine in hich theben ing is accomplished just prior to the be Fig. 2 is a similar view showing the arts bent around the form, and ig. 3 is an enlarged transverse sectional view through the rims and veneers, the sheet metal layer, and a portion of the bending band.

My improved method is especially adapted for bending built-up and solid table rims, 40 although, of course, its application mig e extended indefinitely. ln carrying out my improved method or process in the manufacture'of rims -for example, itis my purpose to proceed somewhat as follows. The builtu rim is preferably composed of two layers o veneer of the variety of wood ofwhioh the table is to be made, as for instance, oak, one layer 1, of veneer being o t e best quality,'and the second inside layer, 2, might be of an inferior qua ity, although of the same variety o woo Then the two inside layers,.3 and 4, are of poplar or other so' t and inexpensive wood capable of being easily bent. These strips are coated on their inside surfaces with glue and to accomplis ess contemplates that, it is impossible to bend the built-up rims alone without the ai ofthe solidrim because of the fact that the end pressure applied ,upon these rims at tie conclusion of the bending operation, coming directly upon the ends of the. veneers wou ,be too great for them to withstand, and it would result in crushing and splitting them, whereas with the solid rim'to withstand this strain, the integrity of the endsl or the veneery composing the built-up. rim l is preserved, and the strain is ,sustained upon the inner solid rim, and furthermore thi end ressure results in an equalize an distributed outer or radial pressure throughout the entire length of the solid rim, which is applied directly upon the built-up rimv so that every point of the latter is subjected to to permanently adhere at every point of conof the ta'ble rims per day, on one bending equal compression, the solid rim pressing l tributed throughout the entire area of the outward and the bending band pressing inbiiilt-up rim. 55 ward with the built-up rim compressed 3. The herei described method or (process therebetween. Thus the layers of the builtl which consists in bending a solid an builtup rim are-brought tight together, and made up rim simultaneously, one superimposed tact throughout their entire area. There is layer of material which prevents moisture this additional advantage; the heat of theI passing from one rim to the other, which solid rim which has been previously steamed l layer has the secondary function of disand saturated with moisture is gradually and evenly conducted through the interposed lai'cr 6 offlexible material to the uprim. built-up rim, thus evenly drying and hardenl- 4. The herein described method or rocess ing the glue and resulting in a forward and l which consists in bending a. solid an builtpermanent adhesion in the shortest possible up-.rim simultaneously, one superimposed period of time, the glue in this Way quickly l upon the other, the solidl rim having been setting, and soon becoming hard and solid. l preyiously saturated with moisture, and 7o l' ith this improved 'method or process, I having a layer of flexible material interposed am enabled to complete as high as 1500 pairs between said solid and builtup rims Which the other, Which layer has the seconda h remaining half built-up, thus making the function of distributing and equalizing the cost in labor and time between one-fifth and strain upon and throughout the entire area one-sixth of the expense of doing the same l ofthe built-up rim. work heretofore.l Three pairsor six vrims vTheherein described process or method, are usually bent in each operation of the which consists in simultaneously bending machine., superimposed solid rim blanks, which have More or less slight. variations might be een previously steamed, over abuilt up rim resorted to' in the method pursued without composed of veneers having adhesive madeparturc'f'rom the spiritand scope of my terial between them, and with an interinvention, and hence I do not Wish to limit mediate layer of flexible material impermyself' to the precise steps herein specified, vious to moisture interposed between the 85 but r steamed solid rim and the rim built up of Having fully described my invention, veneers.` what I claim as new and desire to secure l G. The herein described method of bendby Letters Patent, is ing Wood which consists in applying adl 1e herein descr hesive to a plurality of strips of veneer, ythen 90 of bending Wood which consists in supersuperiinposing them, then placing said imposing a solid and a built-up rim and superimposed veneer strips with adhesive simultaneously bending them concentricallv applied on the bending band of a bending about a common form, with an interposed machine, then placing a layer offlexible nonflexible medium which prevents moisture porous material thereon, superimposing anpassing fromone rim to the other. other layer of bendable material on said non-porous layer, and t en simultaneously A and coiicentrically bending said layers posing two rims, one solid and the other around a common form.

' In testimony whereof I aliix m signature 100 in presence of two Witnesses.

JOHN T. BREECE.

simultaneously bending them from the centen toward both ends, around a common iorm, lfVitnesses:

and finally applying endivise pressure to the l FRANK W7. MoULToN, solid or inner rim which is equally dis-1 C. S. MILLER.

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