A length adjusting mechanism of slitter rewinder, comprising a feeding device, a slitting device, a rewinding device, and a control device, the slitting device and the rewinding device including a length adjusting device therebetween which enables simultaneous completion of rewinding strips of material of multiple winding drums installed on this invention.

A core box with interchangeable rails for holding a variety of sizes of cores.

The present invention provides a long separator roll. A method according to the present invention for producing a battery separator roll includes a connecting step of connecting two or more separators (12b and 12c) to each other along a lengthwise direction so that the battery separator roll is produced.

The coiled foil rolls are reinforced in their edge region by folding. The coiled foil rolls are made by supplying a foil to coiling devices; cutting the foil in a conveying direction with a knife so that at least two foil sections are created which extend in a conveying direction; folding the edge regions of the foil sections by a folding device and laying the folded sections and the remaining part of the foil section on each other; and coiling the foil sections with the coiling devices. The knife or the folding device are moved simultaneous oscillating back and forth in a direction transversal to the conveying direction during the coiling of the foil sections.

Provided is an adhesive film production apparatus for producing an adhesive film having an adhesive layer on a base material layer, the adhesive film production apparatus including: a feeding roller that continuously feeds a raw film of the adhesive film; a cutting part that cuts the raw film of the adhesive film into a plurality of adhesive films having predetermined widths; and a plurality of winding cores that wind each of the plurality of adhesive films, wherein each of the plurality of winding cores has a width larger than a width of the adhesive film as an object of winding.