Damon Corporation

Lester A Sodickson

Franklin Lim

Disclosed is an apparatus for producing capsules of the type which are formed by immersing liquid droplets in a gelling agent. The apparatus comprises a rotor disposed about a central axis of rotation which houses a reservoir for holding the liquid to be formed into capsules, and conduits which lead to ports spaced uniformly on the circumference of a circle. When the rotor is actuated, spheroidal droplets of the capsule-forming material take shape at the ports and are propelled radially outwardly into a gelling agent contained in a reservoir which comprises an annular surface spaced radially apart from the ports.

Apparatus for producing capsules

Chemical analysis of a sample with reagents spotted on a fibrous or porous medium employs a medium pretreated both with reagents and with conditioning agent. The conditioning agent increases the degree to which the liquid reactants wet the medium. One form of pretreated medium has different reagents located predominantly within different selected zones. Liquid is applied to the medium, typically as diluted sample, at a rate selected to enhance formation of repeatable spots. In one embodiment the liquid is applied by flowing it onto a wick element seated on the medium. The wick is disc-like and small relative to the spot which the reactants form on the medium. The disc can be pretreated to carry reagent, which the liquid transfers to the medium.

Method and apparatus for chemical spot test analysis

Chemical analysis of a sample with reagents spotted on a fibrous or porous medium employs a medium pretreated both with reagents and with conditioning agent. The conditioning agent increases the degree to which the liquid reactants wet the medium. One form of pretreated medium has different reagents located predominantly within different selected zones. Liquid is applied to the medium, typically as diluted sample, at a rate selected to enhance formation of repeatable spots. In one embodiment the liquid is applied by flowing it onto a wick element seated on the medium. The wick is disc-like and small relative to the spot which the reactants form on the medium. The disc can be pretreated to carry reagent, which the liquid transfers to the medium. The analysis instrument receives a reaction medium between selectively recessed upper and lower surfaces aligned in opposition at the reaction spot being analyzed. The analysis can, depending on the analytical reaction, the medium and the precision required, proceed while the reactants are wet or can measure a reaction product after the reactants are dry. A single point analysis can also be made.

An optically-thin preparation of a sample solution and chemical reagents produces a constituent-manifesting reaction product that can be measured in linear relation to the concentration of the constituent of interest. A fibrous sheet contains the sample and the reagents for both the reaction and the measurement. The same site on the fibrous sheet which bears the reacting materials serves as a blank to produce a reference signal for the measurement.

Method and apparatus for analysis of constituent carried in fibrous

A press for compressing a liquid-bearing absorbent article to transfer a portion of the liquid materials to a contiguous article has two concentric pressure feet. One is an outer foot member that bears against the liquid-bearing article along the periphery of the pressure area, and the other is an inner, deformable and contoured foot member that applies pressure to the liquid-bearing article progressively along the pressure area. A photometer can be combined with the press to measure constituents or other properties of the liquid materials being transferred.

Growing community of inventors

Newton, MA, United States of America

Lester A Sodickson