A package structure of a roll-shaped thin film includes a thin film roll and a buffer layer. The thin film roll includes a winding core and a thin film wound around the winding core, and the buffer layer is wound around an outer circumference of the thin film. An end portion of the buffer layer is covered with an inner surface of an end portion of the thin film, and the thickness of the buffer layer is in a range of 1-20 mm.

The present invention relates to a device used to aid the rolling up and storage of a water mat or similar material.

A package structure of a roll-shaped thin film includes a thin film roll and a buffer layer. The thin film roll includes a winding core and a thin film wound around the winding core, and the buffer layer is wound around an outer circumference of the thin film. An end portion of the buffer layer is covered with an inner surface of an end portion of the thin film, and the thickness of the buffer layer is in a range of 1-20 mm.

The present disclosure relates to a metal foil core including a winding member around which a metal foil is wound, a first protrusion member protruding from the winding member in a first direction (direction of arrow FD) of a first axis direction (X-axis direction), a second protrusion member protruding from the winding member in a second direction (direction of arrow SD) opposite to the first direction (direction of arrow FD) of the first axis direction (X-axis direction), and a first inducing groove formed in the first protrusion member to be disposed between both ends of the first protrusion member in the first axis direction (X-axis direction).

Described is a device for automatically connecting a continuously manufactured material, the device including a fixed roller rotatably fixed, the fixed roller being rotatable about the shaft of the fixed roller, a swing roller connected to the fixed roller and rotatable by the rotation of the fixed roller, the swing roller being rotatable about the shaft of the swing roller, and a holder plate, connected to the fixed roller, rotatable together with the fixed roller, and configured to hold the material. Also described are a system and a method for manufacturing a material.

The present disclosure relates to a metal foil core including a winding member around which a metal foil is wound, a first protrusion member protruding from the winding member in a first direction (direction of arrow FD) of a first axis direction (X-axis direction), a second protrusion member protruding from the winding member in a second direction (direction of arrow SD) opposite to the first direction (direction of arrow FD) of the first axis direction (X-axis direction), and a first inducing groove formed in the first protrusion member to be disposed between both ends of the first protrusion member in the first axis direction (X-axis direction).