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. 02, 1993
Filed:
Dec. 12, 1991
George D Rhoades, LaGrange, IL (US);
Roger F Gyger, Naperville, IL (US);
Jose M Anaya Izquierdo, Mexico City, MX;
Emilio A Fernandez, Mexico City, MX;
Liquid Carbonic Corporation, , DE (US);
Abstract
A method and apparatus to automatically produce blocks of solid CO.sub.2 at low pressure. The apparatus includes at least one closed mold coupled to a liquid CO.sub.2 conditioner and a CO.sub.2 gas recovery system, and a control panel for automatic operation. The method consists in supplying liquid CO.sub.2 to this mold at a low pressure in order to fill the mold with CO.sub.2 snow of low density during a definite period of time, to then raise the pressure inside the mold to an intermediate pressure by supplying liquid CO.sub.2 at this pressure (and at a temperature of approximately -40.degree. C.) to form a dense mass of solid CO.sub.2 which after a definite time will block the admission of CO.sub.2 to the mold, causing a significant pressure drop that is used to create a signal to automatically close off the supply of liquid CO.sub.2 and finalize the production cycle of the block.