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:
Aug. 07, 2007
Filed:
Sep. 02, 2005
Detlev Gertitschke, Laupheim, DE;
Bernd Zoller, Laupheim, DE;
Jörg Knüppel, Schwendi, DE;
Uhlmann Pac-Systeme GmbH & Co. KG, Laupheim, DE;
Abstract
A base sheet is spanned over a lower roller, and an upper roller pulls a cover sheet along a path and presses it against the base sheet at the lower roller. A preheater housing along the path upstream of the rollers is formed with a chamber open toward the path. A radiant heater in the chamber is directed transversely at the path so as to heat the cover sheet passing along the path. A sensor along the path adjacent the chamber detects atmosphere around the chamber and generates an output when the detected atmosphere indicates an unsafe hot condition of the cover sheet. A shutter can shift between a retracted position offset from the chamber and an advanced position closing the chamber. A controller connected to the sensor shifts the shutter from the retracted position to the advanced position when the output is generated by the sensor.