US2172905A - Wood sectional block - Google Patents

Description

J. J. CURTIN woon SECTIONAL B51001 Filed Jud is,

sew; '12.: 1939 J0 iuv Jo aep&

Patented Sept. 12, 1939 UNITED STATES PATENT OFFICE 1 Claim.

My invention relates to wood sectional blocks used for the purpose of cutting upper and sole leather, paper, cloth and rubber sheeting; it also relates to a clicking machine block.

The object of my invention is to secure a larger cutting surface than the beveled or tapered edge blocks; also to provide a novel corrugation or furrowing of the edge portion of the block to prevent splitting or chipping of the edges of the block.

It is also an object of my invention to provide a block which does not require any special set of irons as it can be made to fit any type of clamping iron in use.

I attain these and other objects of my invention by the mechanism illustrated in the accompanying drawing; in which- Figure 1 is a side elevation of my block;

Fig. 2 is a top plan view of same;

Fig. 3 is a detail side elevational view showing one form of corrugation;

Fig. 4 is a similar view showing a third form of corrugation; and

Fig. 5 is a. similar view showing another form of corrugation.

Like numerals designate like parts in each of the several views. 7

Referring to the accompanying drawing, I provide a block B as shown in the drawing consisting of a group of sections of non-metallic substance joined together as shown to form the complete block, section strips l. The block has its sides and ends corrugated or furrowed at 2 leaving parallel ridges or projecting strips 3. A suitable clamping iron 4 encircles a suitable portion of the block, preferably the bottom, and is secured thereto by the bolts 5 and nuts 6, as shown in Fig. 2 of the drawing.

Most clicking and dinking machine blocks are formed with square top and bottom corners and are clamped or ironed in the middle to prevent the joints from separating. After the surface of this type of cutting blocks becomes worn or dug out, it is resurfaced by a planing machine that can be attached to said machine or a stationary planar. When it is resurfaced, it is apt to chip or tear out the edges of the block.

My purpose is to groove out furrows from any fraction of an inch to one-fourth of an inch deep ever so many fractions of an inch so that when a segment begins to rip, it will carry to the nearest furrow and then break off. It is the nature of 5 hardwood to do this. My invention will prevent having a ragged edge which might scratch a highly glossed leather which might catch on a piece of cloth or other material which the operator is moving.

I have tried my idea on this furrow or corrugator and it has proven successful. A block that has a bevel must lose about two inches of cutting surface, both on the length and the width. My blocks will not need a bevel to alleviate or lessen the splintering or chipping of edges if I apply my furrowing process to its sides and ends.

Any block can be made for any type of irons. All that is necessary is to have the measurement of said block and then bore bolt holes according to the iron. Practically all block construction has been the same for over a half century. The base block is a square-cornered group of sections of Wood or non-metallic substances. Some people bevel the top of a block; some the top and bottom. My idea is to save this most valuable cutting surface for the operator. The advantage of this furrowing is, if a splinter should catch on the sleeve of an operated as he pulled his hand away from the die he would not, if he were using my block, get his hand jammed or cut as he often does at the present time. The depth of the incision should be from any fraction of an inch to onefourth of an inch in a horizontal manner. The corrugation should be from one-eighth of an inch to one-fourth of an inch apart.

What I claim is:

A cutting block of the type described of substantially rectangular shape, and having a clamping iron engaging the bottom of the block, said block having a series of parallel furrows extending around its sides and ends of the block for the purpose of preventing splitting.

JOHN JOSEPH CURTIN.

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