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:
Jul. 14, 1998
Filed:
Oct. 18, 1996
Eric De Smedt, Opwijk, BE;
Wim Verbeiren, Lede, BE;
FMC Corporation, Chicago, IL (US);
Abstract
In a winder for winding webs from a bag-making machine into rolls, a winding turret mounts four winding spindles, each having a web-winding portion and a pulley-mounting portion, which mounts a conjointly rotatable pulley and an independently rotatable pulley. A first timing belt and a second timing belt are arranged to be independently driven. The winding turret is indexable so that, in any indexed position, a first timing belt interengages the conjointly rotatable pulley mounted on the given winding spindle and interengages the independently rotatable pulley mounted on the next winding spindle and a second timing belt interengages the independently rotatable pulley mounted on the given winding spindle and interengages the conjointly rotatable pulley mounted on the next winding spindle. The rotational speeds of a motor driving a given winding spindle, whichever is being used to complete winding of a roll, and the rotational speed of a motor driving a web conveyor are measured. The motor driving the same winding spindle is adjusted so as to maintain a generally constant winding tension on a web being wound. A pair of infeeding rollers and a pair of separating rollers are operated so as to apply a generally constant winding tension to a web, except during intervals during which the surface speed of the separating rollers exceeds the surface speed of the infeeding rollers so as to separate the web at cross perforations.