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. 20, 1984
Filed:
May. 13, 1982
Richard J Zelinka, Circle Pines, MN (US);
Carl W Sims, St. Paul, MN (US);
Sys-Tec, Inc., Minneapolis, MN (US);
Abstract
A temperature control system for a liquid chromatographic column includes a thin film heater/sensor comprising a foil-like patterned heating element adhesively mounted between a pair of flexible electrically insulative layers. A patterned foil-like temperature sensing element is also coextensively adhesively mounted between the insulative layers in temperature sensing relationship to the heating element. The thin film heater/sensor is wrapped around the chromatographic column and is uniformly compressively secured in contact therewith by a spirally tubularly wound length of flexible wrapping. A remote temperature sensing element controls the heat output of the heating element a linear proportional fashion, thereby maintaining a predetermined temperature gradient over the length of the column. A pre and post-column heaters may be similarly wrapped with a thin film heater/sensors so as to appropriately control the temperature of the liquid entering or leaving the column. The heater/sensor may include a plurality of foil-like patterned heating elements and sensors displaced along the length of the column to define a plurality of heating zones controlled by a patterned foil-like temperature sensing element in sensing relation to respective one of the zones.