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. 16, 1999
Filed:
Jan. 06, 1998
Bruce E Hyllberg, Gurnee, IL (US);
Gary S Butters, Greenfield, WI (US);
Thomas S Smith, Spring Grove, IL (US);
Randy L Mittelstaedt, Muskego, WI (US);
American Roller Company, Union Grove, WI (US);
Abstract
A heat transfer roller in a machine for coating, printing, copying or heating a web, has a hollow cylindrical roller core and a metal sleeve for conducting heat to or from an object contacting an outer surface of the roller. A ring-shaped cavity for receiving a heat transfer medium is formed between the cylindrical roller core and the sleeve (15) and extends the length of the roller excluding portions on respective ends. Cartridge heaters are provided for heating the outer wall of the core to further heat the heat transfer medium in the heat pipe cavity. The ring-shaped cavity is divided into sector compartments by longitudinally extending barriers. Wicking material is disposed in respective compartments. The wicking material and flow restriction elements hold a portion of the heat transfer medium in the compartments while also allowing a portion of the heat transfer medium to move circumferentially around the roller to make temperature more consistent across the outer surface of the roller.