A contact roller according to one embodiment includes a cylindrical rubber roll main body, two spiral groove groups provided in a surface of the rubber roll main body, spiral rubber layers which is provided in the groove groups and hardness of which is lower than the rubber roll main body, and a surface rubber layer which covers a surface of the rubber roll main body and hardness of which is lower than that of the rubber roll main body. Nip pressure of the surface rubber layer corresponding to the rubber roll main body is higher than that of the surface rubber layer corresponding to the spiral rubber layers.

To prevent wear powder from adhering to a film, an expander roller (21) is used that extends in the width direction of a porous film (F) and that is configured to apply a tension to the porous film (F) in the width direction, and foreign matter adhering to the expander roller (21) is removed from a portion of the outer peripheral surface of the expander roller (21) at which portion the expander roller (21) is in no contact with the porous film (F).

A web tensioner, a web slitter, a method of tensioning a web, and a method of slitting a web are provided. A corrugated edge nip is used in the tensioner, the slitter, and the methods of tensioning and slitting. The corrugated edge nip can provide a crossweb tension to a suspended web or film in a web line. The corrugated edge nip can be used in conjunction with, for example, a rotary shear slitter to improve slit edge quality.

The present invention relates to a film wrinkle removing roller in which pattern rolls coated with rubber are positioned at both ends of a cylindrical roll made of Teflon, and a porous film comes into contact with the roll and the pattern rolls, such that the film may be prevented from wrinkling and a surface of the film may be prevented from being abraded due to friction between the film and surfaces of the rolls.

A contact roller according to one embodiment includes a cylindrical rubber roll main body, two spiral groove groups provided in a surface of the rubber roll main body, spiral rubber layers which is provided in the groove groups and hardness of which is lower than the rubber roll main body, and a surface rubber layer which covers a surface of the rubber roll main body and hardness of which is lower than that of the rubber roll main body. Nip pressure of the surface rubber layer corresponding to the rubber roll main body is higher than that of the surface rubber layer corresponding to the spiral rubber layers.

A medium transport apparatus includes a transport section configured to support a medium and transport the medium in a transport direction, and a wrinkle reducing section configured to come into contact with the medium to reduce the formation of wrinkles in the medium. The wrinkle reducing section can change surfaces to come into contact with the medium. The medium transport apparatus having such a structure enables to reduce the formation of wrinkles in the medium.

Aspects involve systems and methods for producing an electrode laminate for a battery that includes a tension device to maintain tension on an electrode stack as the stack is cut into a shape. The tension device may include a first roller and a second. The upper roller may rotate in a counterclockwise direction as the lower roller rotates in a clockwise direction to pull or otherwise draw a skeleton of a cut stack through the tension device. A collection of spaced flexible and resilient flaps may be connected to the upper roller and may rotate with the upper roller. A contacting edge of each of the flaps may contact the skeleton of the stack and gently pull the skeleton through the tension device providing a relatively continuous pull on the stack as it proceeds through a cutting station.

A medium transport apparatus includes a transport section configured to support a medium and transport the medium in a transport direction, and a wrinkle reducing section configured to come into contact with the medium to reduce the formation of wrinkles in the medium. The wrinkle reducing section can change surfaces to come into contact with the medium. The medium transport apparatus having such a structure enables to reduce the formation of wrinkles in the medium.