| 摘要 |
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 indep endently rotatable pulley. A first timing belt and a second timing belt are arranged to b e independently driven. The winding turret is indexable so that, in any indexed po sition, a first timing belt interengages the conjointly rotatable pulley mounted on the given winding spindle and interengages the independently rotatable pulley mounted on t he next winding spindle and a second timing belt interengages the independently rot atable pulley mounted on the given winding spindle and interengages the conjointly rota table pulley mounted on the next winding spindle. The rotational speeds of a motor dri ving 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 const ant 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 tens ion 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. |
