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:
Oct. 04, 1977
Filed:
Sep. 03, 1976
Jan-Olof Johansson, Hoganas, SW;
Karel Spacek, Morarp, SW;
Gullfiber AB, Billesholm, SW;
Abstract
An automatic-tensioning arrangement for roller driven belts of a cellular plastic forming machine is described. Sensor means are provided for detecting lateral movement of the belts on the support or drive rollers thereof and for generating a control signal in response thereto. The control signal from the sensor means is applied to a hydraulic tensioning device which displaces the drive rollers longitudinally of the belts to automatically tension the belts in response to detected lateral belt movement. A hydraulic tensioning device is provided for each end of each drive roller so the respective ends can be moved separately from one another. Accordingly, by selective movement of the respective ends of the rollers the belts can be guided back to normal desired position in response to a control signal from the respective sensor means.