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. 15, 1994
Filed:
Jul. 01, 1993
Hans-Peter Zimmermann, Karlsbad, DE;
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
An apparatus for performing capillary electrophoresis comprises a housing (37) to which a sealing and electrode arrangement (36) is fastened and a removable cassette (22) which accommodates a capillary (1) in which electrophoretic separation of a sample takes place when an electric field is applied. When performing an electrophoretic separation, the end of the capillary (1) and a tube-shaped electrode (39) surrounding the capillary (1) dip into a liquid vial containing electrolyte or sample liquid. Liquid is injected into the capillary (1) by applying pressure on the liquid in the vial. An elastomeric seal (40) around the capillary (1) is provided to prevent escaping of the pressure during injection. The end of the capillary (1) depending from the cassette (20) is introduced through a funnel (41) and a central bore in the seal (40). When the cassette (20) is pressed downwards onto the funnel (41), the elastomeric seal (40) is squeezed so that the capillary (1) is sealed off. Since the seal ( 40) is arranged in the housing (37), no sealing is required in the cassette, resulting in a simpler construction of the cassette and facilitating replacement of the capillary in the cassette. (FIG. 4)