The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 14, 1978
Filed:
Jul. 05, 1977
Robert M Stahl, Indianapolis, IN (US);
Bio-Dynamics Inc., Indianapolis, IN (US);
Abstract
A method for making fluid release bags having a particular use to disperse reagents into a reaction chamber during centrifugation and as burst bags for manually dispersing reagents. The bags are made by scoring a flexible film material with a laser to form a uniform and predetermined linear depression along approximately the entire length of the film. The film is folded along the linear depression such that there are two sides of approximately equal dimensions and such that the bottom edge of the folded film is the laser scored linear depression. Portions of the two sides of the film are sealed together at predetermined intervals to form a continuous film of attached bags having one open end. A substance is injected into each bag through the open end. The open end edges are sealed together, and the bags are separated from one another into individual bags or groups of bags by suitable cutting means. These bags can then be used individually or in centrifuges and will suddenly and fully rupture at a predetermined level of pressure or centrifugal force which depends on the depth of the linear depression scored by the laser.