Specification of John Henry Johnson : capsules.

  • Johnson, John Henry
Date:
1875
Catalogue details

Licence: Public Domain Mark

Credit: Specification of John Henry Johnson : capsules. Source: Wellcome Collection.

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    Provisional Johnson's Improvements in the Manufacture of Capsules, be introduced into the stomach without having any action upon the organs of taste, and it consists in forming the capsules of a peculiar composition of substances, and of an improved mode of and apparatus for producing such capsules. The capsules are composed of a mixture of the following substances 5 in about the under mentioned proportions, vizt.,— about 1 part of best gelatine, „ 1| „ chemically pure glycerine, „ 2J „ distilled water. The before-mentioned substances are melted in a water bath and 10 carefully stirred in order to obtain a liquid of the consistence of syrup, and then clarified. The moulds may be composed of any suitable material adapted to the liquid they are subsequently intended to receive. In manufacturing the capsules the operator lays hold of the mould 15 by its handle and dips it into the semi-liquid mass, care been taken by a quick and dexterous turning of the mould to spread the last drop equally over the whole surface in such a manner as to cause the part where the handle is situate to be covered to a somewrhat greater thickness ? - * *■ ■. than the other portions. 20 0 * ._ In order to effect the removal of the capsules from the moulds (which • , _ * may take place from l/2 to 1 hour after the operation of dipping) the capsule is cut round with a cutting tool close to the handle, the portion of the composition which may remain on the handle is cleaned away, and the capsule now prepared is drawn down from the mould by a quick 25 but uniform rolling, care being taken that the capsule be not completely turned down. The closing of the filled up capsules is effected with the same com¬ position by the employment for this purpose of a round horn in the form of a ring made, say, for example, of silver wire corresponding with 30 the aperture to be closed. The wired horn is dipped into the semi¬ liquid, its opening being covered therewith, and then placed upon the capsule, which is in this manner perfectly closed up, care being taken to maintain the semi-liquid mass at a suitable warm temperature.
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