US9455A - Improvement - Google Patents

Description

E. A. POND.

Pill Machine.

No. 9,455. Patented Dec. 7,1852.

UNITED STATES PATENT" OFFICE.

ERASMUS A. POND, or RUTLAND, VERMONT.

IMPROVEMENT m PILL-MAKING MACHINES.

Specification forming partpf Letters Patent No. 9,455, dated December 7 185 To all whom it may concern:

Be it known that I, ERASMUS A. POND, of

Rutland, in. the county of Rutland and Stateof Vermont, have invented certain new and. useful Improvements in Machinery for Making Pills; 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 part of this specification, in which- Figure l is a side elevation of one of my improved pill-making machines. Fig. 2 is a vertical-section of the same. Fig. 3 exhibits one of the mold-rollersdetached from the machine. Fig. 4 is a section'of the parts of the two mold-rollers which arein contact.

Similar letters of reference indicate corresponding 'parts in each'ot' the several figures. v This invention consists in the employment of two cylinders having a number of recesses in their peripheries, the said recesses beingv of hemispherical form or of theform of half the pills, and at corresponding distances apart 'in each. cylinder, and the cylinders being placed parallel with each other with their peripheries nearlytouching, and being geared together in such a manner that the recesses in each match onregister with the recesses in the other, and that they will revolve'in opposite directions. Thetpill mass is fed in between thecylinders by a pair'o'f feed-rolls, and, beingpressed into therecesses, is formed into pills. In order to prevent the pills remaining in the recesses and to insure their being disengaged from the cylinders, a small roller'is placed parallel with each cylinder, and an endless band of thin india-rubb'er or other elastic material of sufficient width to cover all therecesses' passes round the cylinder andsmall roller. This band moves with the revolution of the cylinder, and is pressed into the recesses by the pill mass as it is formed into pills; but after the molds'pass each other and the pressure is removed, the band springs out of the molds and expels or delivers the pills.

To enable others skilled in the art to make and use my invention, I will proceed. to describe its construction and operation.

A is the frame of the machine.

B B are the mold-cylinders, whose journals 1) b are fitted to suitable bearings in the frame.

The two cylinders shown are just alike, each having the same numberof recesses a a, similarly arranged. It is intended that the recesses shall be as close as possible together, so as to have the greatest number possible in one pair-of cylinders. The toothed wheels 'L L, by which the cylinders are geared, have each the same number of teeth, so that they revolve at the same speed.

0 G are the feed-rolls, which are placed at ders faster than the feed rolls.

The elastic bands I I are .shown in Figs. 1

and 2, and also in Fig. 4, in red color, for the sake of ciearer'identilication. The rollers J J round which they pass have their axes fitted in suitable hearings in the framing. 'the mold-cylinders there is an inclined trough "or' chute, K,.into which the pieces fall and Under down which they are conducted intd any suitable receptacle. The pill mass is placed above the-feed-rollers and is drawn through them,

by which it is reduced to sheets of suitable thickness to make the pills, and pressed down to the mold-cylinders. By the revolution of the cylinders the matching-recesses are placed,

and as they come in contact each matching pair forms a perfect mold and form one pill.

Themanner in which the elastic band operates is shown in Fig. 2, where it is shown at e pressed into the recesses a a, and entirely surrounding or incasing the pill. At f the mold is shown open, and the pill is just be-. ing expelled from the recess. The recesses and band are shown in the last place in dotted lines, as the mold there represented is not in line with the one above it. The molds are out of line circumferentially for the purpose of using the whole width of the sheet or" p'ill mass. Fig. 4 shows a whole row of molds filled. What I claim as my invention, and desire to secure by Letters Patent, is-- The mold-cylinders and feed-rollers are 1. Molding or forming pills by'means of. two cylinders, B B,'havi-ng. each a number of recesses, a w, in its periphery, the recesses in one cylinder matching with those in theother, and each matching pair forming a mold of the required form of the pilL-the said'cylinders revolving in opposite directions, and the pill mass being conducted between them, substantially as herein described.

2; The bands I I, of indie-rubber or" any sufiiciently elastic material. passing round or partlyround the mold-cylinders, for the'purpose of expellingthe pills from the recesses a a after ifs he molds are open, substantially as herein set orth.

ER'AsMUs A. from).

Witnesses:

W. H. SMITH, L. B. PHILBRIOK.

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