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:
Jun. 29, 1993
Filed:
Jun. 03, 1992
Lutz Beckmann, Munich, DE;
Agfa-Gevaert Aktiengesellschaft, Leverkusen, DE;
Abstract
A tank for wet treatment of a running web of photosensitive material has a set of upper pulleys and a set of lower pulleys mounted on a common support and movable up and down toward and away from the upper pulleys. The web is alternatingly trained over the upper and lower pulleys to advance along a meandering portion of its path from a first drive at the inlet into the body of liquid in the tank to a computer-controlled second drive at the locus of emergence of the web from the body of liquid. At least one additional drive is provided for one or more median upper pulleys to thus reduce the tensional stress upon the repeatedly looped running web. The additional drive can employ a capacitor motor, a d-c motor, a hysteresis motor or clutch, a pneumatic motor or a hydraulic motor. Such additional drive can rotate the respective upper pulley at a constant speed or at a speed which varies as a function of changes in the speed of advancement of the web through the body of liquid. The web is tensioned solely by the weight of the lower pulleys and of the common support for the lower pulleys.