US10536A - Machine for scraping and toothing veneer - Google Patents

Description

' yscraping or UNITED sTATEs PATENT oEEioE.v

ALLEN GOODMAN AND LYMAN WHEELER, OF DANA, MASSACHUSETTS.

MACHINE FOR SCRAPINGr AND TOOTI-IING VIEJNElilt.`

Specification of Letters Patent No.

T0 all whom t may concern Be it nknown that we, ALLEN GOODMAN and LYMAN WHEELER, both of Dana, in the county of Worcester and State of Massachusetts, have invented a new and useful Machine for Scraping and Toothing Veneer, and that the following description, t-aken in connection with the accompanying drawings hereinafter referred to, fO-rms a full and eX act specification of the same, wherein we have set forth the nature and principles of our said invention by which it may be distinguished from others of a similar class, together with such parts as we claim and desire to have secured to us by Letters Patent.

The figures of the accompanying plate of drawings represent our improvements.

Figure 1 is a plan or top view of our machine. Fig. 2 is a side elevation of the same. Fig. 3 is a central longitudinal vertical section of the machine.

The Ioperations of scraping and toothing veneer, after it has been cut Or sawed out, have hitherto been done by hand, and are necessarily attended with considerable expense, as the work can be done but slowly in this manner.

By our improvements veneer can be scraped on one side, and toothed or roughened on the other, with much greater rapidity and with less expense, whilethe work is much more evenly and accurately performed.

The most essential parts of our machine consist of a revolving cylinder in which the toothing knives are placed in a peculiar' position, that is bac-k of the axis of the said cylinder, and inclined from the same, and a large bed roll around which the veneer is bent and held, the veneer being fed along and kept in proper position, by suitable mechanical devices as will be hereinafter explained.

a a a in the drawings, represents Ithe framework Of the machine.

b is the driving shaft from which motion is communicated by pulleys c, c and the belt cl d to the knife cylinder, f f, which-revolves upon journals in the movable framey g g g, the fulcra of which are placed at 71 7L.

z' z' is a large bed roll to which motion is imparted as follows: On the end of the driving shaft b Zi is placed a drum lo which gives motion, by a hand Z Z, to the drum on the shaft of which is the pinion a, Fig. 3. This pinion engages with the gear wheel o on the 10,536, dated February 14, 1854.

cross shaft p, which gives motion to t-he bed roll z' z', through the drums g, q and hand r 7'. The veneer is fed in on the bed roll i and bent around the same by hand, so as to rest upon a circular bed, and passes to the toothed knives s, s on the revolving cylinder f These knives are placed a little back' of the l axis Of the cylinder f f, and areinclined from the saine at a small angle, giving them a scraping instead of a cutting position, so as to prevent them from tearing the veneer, which result would happen if the knives were ot-herwise placed. The veneer in passing to the knives is held upon the bedroll by an adjustable spring plate t t, turning upon journals in the movable frame g g, and after being toothed by the knivesvs, s is held by another spring plate u and fed along by a notched roll c which has motion imparted to it by the drums w, w and the belt a. The Opposite side of the veneer can then be scraped or smoothed, by substituting smoothing tools for the toothed knives in the cylinder f f or by arranging the smoothing tools on a separate cylinder for the purpose.

By the above described arrangement of devices, the veneer can be scraped and toothed and also reduced to a uniform thickness, in `much less ytime and with much greater accuracy than by hand, while the expense attendant upon the operation is materially diminished.

It will readily be seen thatthe large feeding bed roll around which the veneer is bent Y vand held, is an essential feature of our machine, as t-he veneer without such a bearing as this roll affords, would be liableto be torn and split bythe toothing tools.

Having tlius described Oulr improvements,

we shall state our claims as follows.

What we claim as our invention is@ A machine for scraping s and toothing veneer which has a large feeding bed roll around a portion of which the veneer is -bent and held, .and a revolving cylinder with scraping or toothing tools Or knives,inclined back from the axis of the vsaid cylinder, yso

as to have a scraping instead of a cutting position, substantially as herein above de-` scribed. m

ALLEN GOODMAN. LYMAN WHEELER. Witnesses: s

DANIEL STONE, NELSON BLANTON.

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