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. 29, 1994
Filed:
Aug. 16, 1993
Applicant:
Inventor:
Nicholas M Nanos, Morton Grove, IL (US);
Assignee:
General Binding Corporation, Northbrook, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F27B / ;
U.S. Cl.
CPC ...
219388 ; 219505 ; 219497 ; 219506 ; 156322 ; 1563809 ;
Abstract
A laminator temperature control includes a control circuit having a sensing amplifier that drives a triac to control power to PTC heating elements. A temperature sensor at an input of the sensing amplifier causes power to be inhibited to the heating elements when a predetermined adjustable temperature is reached by heating plates positioned between two pairs of rollers. When the heating plate temperature is below the predetermined temperature, proportioned control of the power supply duty cycle is provided. Indicators display the power supply status and temperature ready status of the laminator.