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. 19, 1981
Filed:
Feb. 19, 1980
Graham A Byrt, Bristol, GB;
Kenneth Chandler, Bristol, GB;
Masson Scott Thrissell Engineering, Bristol, GB;
Abstract
A paper sheeter for cutting two or more webs simultaneously into sheets has a rotary knife to make the cuts in desired register with marks (e.g. watermarks) carried by the web. A sensor is provided for detecting the marks on each web and a further sensor monitors the knife rotation; signals from the several sensors are fed to a control unit in which the signals from each mark sensor are compared with signals from the knife sensor to produce feed control signals for the respective web. These control signals may be applied to brakes associated with the web supply reels to vary the tension in each web; alternatively one web may be controlled by using the control signals to vary the speed ratio between the knife and pull rolls feeding the webs to the knife.