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:
Dec. 10, 1996
Filed:
Jan. 25, 1995
Manfred Eigen, Gottingen, DE;
Wolfgang Simm, Rosdorf, DE;
Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V., Gottingen, DE;
Abstract
A plate having wells therein for receiving chemical substances is provided with a coverplate covering said filled wells. The process for sealing the wells by providing a joining seam running around the wells provides the joining seam such that it has a profiled cross-section in order to increase the contact surface between the plate and the coverplate. To this end a welding die has a front surface provided with projecting profiled regions and being heated to a temperature in the region of the melting point of the coverplate. The welding die is placed on the coverplate means and remains there for a fixed first period. Then the welding die is pressed down through a fixed path and remains in this position for a fixed second period. Removing the welding die from the coverplate is the last step in the process.