Test pouch
AssigneeEastman Kodak Company
InventorsJohn B. Chemelli, Walter J. Bernecker, Craig A. Caprio
Life of this patent
Estimating the term…
Abstract
Method and an apparatus for measuring the development parameter of a light-sensitive fluid in a white-light environment. The apparatus comprises first and second flexible light-impervious sheets superimposed and sealed together to form a pouch containing a plurality of chambers having flow paths therebetween, wherein the chambers are sealed with burstable seals allowing fluid communication between the chambers upon the application of a predetermined pressure.
Claims3
A method of measuring a development parameter of a light-sensitive fluid in a white-light environment comprising:
- introducing a predetermined amount of the light-sensitive fluid into a first chamber of a light-impervious containment apparatus;
- heating the light-sensitive fluid to a temperature above 100.degree. F.;
- applying a predetermined pressure along a flow path between said first chamber and a mixing chamber of said containment apparatus;
- bursting a seal positioned across said flow path between said first chamber and said mixing chamber;
- transferring the light-sensitive fluid from said first chamber to said mixing chamber;
- mixing the light-sensitive fluid with a sufficient amount of developer in said mixing chamber to develop the light-sensitive fluid to a light-insensitive mixture;
- transferring the light-insensitive mixture to a detection site in communication with said mixing chamber and disposed in the white-light environment;
- and
- measuring said development parameter in the white-light environment.
A method for measuring the development of a photographic emulsion having silver particles therein in a white-light environment using a pouch, the pouch having first, second, third, fourth and fifth contiguous chambers sealed by burstable seals and connected by channels, the method comprising the steps of:
- (a) pre-filling the first chamber with a measured amount of a developer;
- (b) pre-filling the fourth chamber with a measured amount of a fixer;
- (c) adding a measured amount of the emulsion to be tested to the second chamber;
- (d) heating the pouch to a temperature above about 100.degree. F.;
- (e) bursting the developer seal and transferring the developer by external pressure means into the second chamber;
- (f) flowing the content of the second chamber into the third chamber by exerting an external pressure onto the second chamber and allowing the mixture a dwell time of about 30 seconds to allow for the reaction of the developer and the emulsion;
- (g) exerting an external pressure simultaneously on the third and fourth chambers thereby transferring their contents into the fifth chamber and allowing them to mix to obtain a final, reacted emulsion;
- (h) transferring the reacted emulsion into a detachable vial attached to the fifth chamber by exerting an external pressure onto the fifth chamber;
- and
- (i) taking a photometric reading of the filled vial using an infrared device to determine the amount of silver particles in the reacted emulsion .
Dependencies are inferred from the claim text.