US1031935A - Cutter. - Google Patents

Description

W. F. HUTCHINSON.

GUTTER.

APPLICATION IILED AUG. 9, 1911.

1,031,935. Patented July 9,1912.

COLUMBIA PLANOGRAPH 60.. WASHINGTON, I). c.

UNEPED %TATE% WILLIAIVI F. HUTCI-IINSON, 0F VALA'IIE, NEW YORK, ASSIGNOB TO IVIATCI-I fiUPPLY COMPANY, OF VALATIE, NEW YORK, A CORPORATION OF NEW YURK.

CUTTER.

Application filed August 9,

To all QU/LOWZ 2'25 may concern Be it known that 1, WILLIAM F. Huron- INSON, of Valatie, Columbia county, New York, have invented a new and useful lmprovement in Cutters, of which the following is a full, clear, and exact description.

My invention relates to improvements in cutters such as are adapted for use in cutting cylindrical or semi-cylindrical devices from sheet stock, and especially to cutters which are adapted to cut so-called round match splints from strips of veneer, paper or the like.

The object of my invention is to produce a simple form of cutter in which the initial cuts are made by thin dividing cutters which pierce the stock without giving it its complete shape, and in which shaving or plan ing cutters are used between the dividing cutters to form the complete cutter head, these second cutters serving to give to the stock its desired shape. By constructing the cutter in this way I am enabled to work the stock nicely without slivering it, and to easily, rapidly, and perfectly shape the stock, as the dividing cutters or knives are very thin and are slightly beveled, while the secondary cutters are shaped to form a generally semi-cylindrical cut, and their edges coincide with the ends of the beveled portions of the dividing cutters or knives. In this way I can build up a cutter head very simply which is etficient, and moreover the parts are readily separable so that they can be easily ground and assembled or replaced in case of accident to any of the parts.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar reference characters indicate corresponding parts in all the views.

Figure 1 is a side elevation of one of the circular cutters or knives. Fig. 2 is an edge view of the same. Fig. 3 is a broken side elevation partly in section, of one of the secondary cutters which lies between two of the circular knives, and Fig. 1' is a plan view showing several of the knives and secondary cutters assembled on a shaft.

In making up a cutter head I use a series of thin circular knives 10 which in practice are very thin circular sheets of steel, thinner than the drawing shows, as it is neces- Specification of Letters Patent.

sary to exaggerate the drawing somewhat Patented Julyfi, 1912.

1911. Serial NO. 643,228.

to make the construction clear. These circular knives are provided with thin cutting edges 1O termed by rinding the said edge. to a bevel on each side, and the knives are preferably provided w'th keyways 11 so that they may be keyed to a shaft 12. although they may be otherwise secured it de sired. Alternating with the circular knives 10 are the cutters 13 which are also of a generally circular shape, and provided with keyways 13 or equivalent means of fastening them to the shaft. he cutters 13 are of less diameter than the knives 10, and are provided at frequent intervals with clearance spaces 14, thus forming shoulders 15 which do the cutting on the stock, while the edge faces of the cutters 13 are concaved as shown at 15 in Fig. t so as to enable them to make a semi-circular cut. The parts immediately behind the shoulders 15 are of the full diameter of the cutters, so that the latter when dull may be ground by simply grinding across the face of the shoulders 15 until the clearance spaces 1 are reached, and thus the cutters can be used until worn out. When the parts are as sembled on a shaft as 12, the outer perimeter of the cutting edges or shoulders 15 coincide with the inner ends of the bevel forming the edges of the knives 10, so that the parts 10 and 13 are required to make a complete cut, and in operation the edges of the knives 10 enter and divide the stock and partly form it as it is squeezed between the beveled portions of adjacent knives, while the cutting portions 15 of the cutter 13 complete the cut, and as the cutter head is rapidly rotated against the stock it will be seen that the stock is divided into a series of semicylindrical parts. Obviously any desired number of these knives and cutters can be combined to form a complete cutter head, and in practice two sets of cutter heads are used, one cutting part way through the stock on one side, and an opposed cutter cutting through from the other side to form a cylindrical article.

I am aware that it is not new to use thin circular saws to divide a strip o1 stock into narrower strips, and to employ shaping devices between the saws, but this arrangement does not produce the effect which I achieve by my improved cutter, because it wastes a good deal of material and does not produce a perfectly smooth article. With a cutter such as I have shown and described it will be seen that not a particle of stock is wasted. The smooth outer edges or the disks 10 simply enter and divide the stock, squeezing each splint member slightly, while the cutter 13 continues the shaping, and when the stock is shaped it comes back to a normal condition and is perfectly formed. For example, it is common to cut a strip of stock afoot wide in machines of this class into splints or the like, which are one-tenth of an inch in diameter. By my improved cutter I get from a width of stock a foot in diameter, one hundred and twenty splints. Now in actual practice it has been found impossible to make saws less than one-six tieth of an inch in diameter, and such saws are not stiff enough to be of practical value, but assuming that such saws are used, it will be seen that in such a strip of stock they would waste in saw kerfs, one hundred and twenty-sixtieths of an inch, or two inches of the stock. lVhile it is considered that these lengths are usually cut into splints two inches long, it will be readily seen that I effect a great saving in working upon astripof stock of any considerable length. Moreover, I get a more perfect splint, and to insure this it is my practice to have a grinding tool which will enter bet-ween two adjacent disks and grind the bevel of the disks and the face of the cutter 13 at one operation, so as to make certain that there is no roughness 0r imperfection in the splints due to an imperfect junction of the cutting portion of the cutter 13 and the bevel of the disk 10. There is nothing new broadly in forming cylindrical articles by cutting first on one side of the stock and then on the other in this way, and for this reason I have not shown the scheme more fully, as I do not here claim anything eX- cept the cutter head illustrated and described.

VVhile I have shown and described a cutter head designed to cut cylindrical or semicylindrical articles, it will of course be understood that I am not confined to cutting articles or" this shape, and that the cutting portions of the cutters 13 can be shaped to cut other forms without in the least afiecting the invention.

I claim A cutter head comprising a series of thin circular knives having smooth, peripheral cutting edges, and cutters of less diameter than the knives and alternating therewith, the said cutters having, curved peripheral cutting portions the outer parts of which meet and form continuations of the bevel of the aforesaid circular knives.

WILLIAM F. HUTGHINSON.

lVitnesses IVARREN B. I-IUToI-IINsoN, THOMAS T. SEELYE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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