US83179A - Improvement in manufacture of card-clothhjg - Google Patents

Description

N. PETERS. PHOTO-L) NNNNNNNNNNNNNNNNNNNNNN C.

EDWIN S. LAWRENCE, OF WORCESTER, MASSACHUSETTS.

LenersPamNo. 83,179, daad octobeff 20,1868. i

The Schedule referred to in these Letters Patent and making part o( the same.

.Know all men by these presents:

That I, Enwir.Y S. LAWRENCE, of the city and county of VVorGeSter, and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Card-Clothing; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and in which- Figure l represents a perspective view of so lunch of a piece of eard-clothingand holding-plates as is necessary to illustrate my present improvements, and

Figure 2 represents, upon an enlarged scale, a section of a piece of card-clothing, showing the relative positions of the back and teeth when 'the latter are set in thick-paper backs, as will be hereafter' explained.

To enable those skilled in the art to which my invention belongs to make and use the same, l will proceed to describe it more in detail.

The nature of my invention consists--v First, in setting the card-teeth in paper backs, while the latter are satmated or in a moistened state. as

hereafter explained;

Second, in setting the teeth in moistened-paper backs, in which the holes are not punched entirely through the backs by the pnnctru'ing-illstrument, previous to the entering of the points of the teeth, as hereafter explained; and

Third, in subjecting the sides of the strips of cardclothing to pressure dining the process of drying, for the purposes hereafter stated.

ln the drawings, iig. l represents a piece of a paper back, A, which is composed of a series of -layers or thicknesses of paper pressed closely together, andwhich is usually made in long pieces rolled up.

These pieces I cut up into the desired lengths, which depends upon the particular use to which they are to.

be applied.

After cutting up the pieces, they are placed in-wat'er for some six hours, after which they are removed and covered up with a clotlror other proper covering, and allowed to remani from eight to twelve hours, to. even up, that is, to allow.time for the moisture to penetrate through the entire back.

The pieces are now taken and the teeth set while the paperbacks are in a moistened state, when the strips are taken and placed between guide or supporting-pieces, B B, which are to be forced 'against the sides of the strips A, for the purpose of preventing 'the strips from contracting or drawing out of line or slhape as they dry, or the moisture is evaporated there- The guide-pieces are to be forced up against the sides of the strips as they dry, which operation may be performed by mechanism arranged to operate antomatically, if preferred.

In the operation of setting the card-teeth, the paper back is not pierced entirely through, prior to the enter ing of the pointed ends a a of the teeth, consequently when the teeth are forced through the back, in completing the puncture, a portion, l), of the moistened libre is elevated or forced out with the teeth, as shown in the drawings, especially in g. 2, which is made upon an enlarged scale, to illustrate more fully this feature.

As the backs dry, the extended or elevated parts b of the fibre dry and contract about the base of the teeth, and thus forinsupporting-gums, as it were, which add Very much to the firmness of the teeth, as will be apparent to those skilled in the art, or to those not skilled in the alt, by reference -to lig. 2 of the drawings.'

The thick-paper back, when dry, is far superior to leather or wood for holding the teeth.

It is not affected by heat, as leather is, when the clothing is used for tentering cloth in drying-machines.

Its superiority is also shown when the clothing is used in the construction of cards or machines for working flax, wool, woollen rags, and other fibrous material. The teeth do not work loose, norare they so liable to spring or twist out of place.

A paper back can be made for light work, in which the teeth can be .set when the back is dry, but it is impossible to set the teeth in thick-paper backs, without first wetting or moistening the material, as before explained.

In some cases, where wooden backs are used, the latter are necessarily made in curved form, to fit the cylinder upon which they are to be fastened, whereas, wheuthick-paper backs are used, they can be bent with ease to lit any-sized or shaped cylinder or workingsurface.

In fig. 2, one of the holes, as made in the paper-back before the teeth are set, is shown at c, upon an enlarged scale.

Haidng described my improved clothing for carding and other machines,

What I claim therein as new and of mypinvention, and desire to secure by Letters Patent, is

l. Gard-clothing, made or composed of a series of teeth set in paper backs, A, in a moistened state, and

4then dried, substantially as and for the purposes set forth.

2. Gard-clothing, made or composed of a series of teeth set in wet or moistened-paper backs, and then the sides of the backs subjected topressure while the drying-operation is completed, substantially as and for the purposes set forth.

3. Gard-clothing, made or composed ofa series of teeth, C, set in moistened or wet-paper backs, in the manner above described, whereby the teeth are supported by elevations or gums, b, substantially as shown in the drawings.

'EDWIN S. LAWRENCE. Witnesses:

Tnos. H. Dones, Gino. H. MILLER.

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