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:
May. 28, 1991
Filed:
Sep. 15, 1989
Richard P Bolger, Schaumburg, IL (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
A position sensor system for controlling accurately the movement of a print head so that printing occurs on a series of products at the same location independent of product speed, changes in speed and mechanical delays includes a product or product mark sensor, a speed sensor, an integrator, and a comparator. The product mark sensor detects the presence of a product mark on each product to be printed upon to generate sensed signals. The speed sensor detects the speed of the product to be printed upon to generate a speed signal. The integrator is responsive to the speed signal and the sensed signals for generating a ramp signal indicative of the actual position of the product to be printed upon. The comparator compares the ramp signal with a reference signal compensating for mechanical delays and generates a clutch-on signal to activate a print head clutch to cause movement of the print head into a printing position.