A core insert (103) for insertion into a core (700) of a roll (500, 600) of material and a hand tool using the core insert for applying the material to a surface (1100). The insert (103) includes a gripper sleeve bearing (7) rotatably connected to a spindle hub (101) attached to an axle shaft (1). The bearing (7) has tapered axial splines (104) extending away from center of the bearing (7) configured to grip the inner surface of the core (700). The hand tool includes the core insert (103) and an axle shaft (1), a handle shaft (2) and a shaft connector (9). The axle shaft (1) is insertable into the core (700) with the bearing (7) inserted into the (700) core to releasably and frictionally engage the core (700) so that the roll (500, 600) is rotatable about the axle shaft (1) along with the bearing (7).

A core insert (103) for insertion into a core (700) of a roll (500, 600) of material and a hand tool using the core insert for applying the material to a surface (1100). The insert (103) includes a gripper sleeve bearing (7) rotatably connected to a spindle hub (101) attached to an axle shaft (1). The bearing (7) has tapered axial splines (104) extending away from center of the bearing (7) configured to grip the inner surface of the core (700). The hand tool includes the core insert (103) and an axle shaft (1), a handle shaft (2) and a shaft connector (9). The axle shaft (1) is insertable into the core (700) with the bearing (7) inserted into the (700) core to releasably and frictionally engage the core (700) so that the roll (500, 600) is rotatable about the axle shaft (1) along with the bearing (7).

A multi-layer flexible film includes a first polymeric layer. A functional layer is disposed over a first major surface of the first polymeric layer. A barrier layer is disposed over a second major surface of the first polymeric layer. The first polymeric layer separates the barrier layer from the functional layer. An adhesive layer is disposed over the barrier layer. The adhesive layer defines a first outer surface of the multi-layer flexible film.

A multi-layer flexible film includes a first polymeric layer. A functional layer is disposed over a first major surface of the first polymeric layer. A barrier layer is disposed over a second major surface of the first polymeric layer. The first polymeric layer separates the barrier layer from the functional layer. An adhesive layer is disposed over the barrier layer. The adhesive layer defines a first outer surface of the multi-layer flexible film.

A rolling device for a secondary battery includes a mandrel to roll a first electrode plate, a second electrode plate, and a separator interposed between the first electrode plate and the second electrode plate, the mandrel having a pair of clamps at a center of the mandrel, a blade surrounding the clamps while being spaced apart from the clamps, the blade having an elliptical cross-section and being divided into four sections, the first electrode plate, second electrode plate, and separator being rolled on the blade, and a rotating body coupled to an interior side of the blade, the rotating body being between the clamps and the blade.

A rolling device for a secondary battery includes a mandrel to roll a first electrode plate, a second electrode plate, and a separator interposed between the first electrode plate and the second electrode plate, the mandrel having a pair of clamps at a center of the mandrel, a blade surrounding the clamps while being spaced apart from the clamps, the blade having an elliptical cross-section and being divided into four sections, the first electrode plate, second electrode plate, and separator being rolled on the blade, and a rotating body coupled to an interior side of the blade, the rotating body being between the clamps and the blade.

A tarp deploying apparatus for use on a trailer includes a fiberglass tarp roller. The fiberglass tarp roller is constructed from two fiberglass tubes. A splined joint is used to join the two tubes together. Each end of the tarp roller also includes a female socket with grooves to engage splines on a motor shaft that drives the tarp roller or to connect the roller tube to a universal joint. A pin or bold may also be used at the splined joint to securely hold the tarp roller together without the need for a welding operation.

The invention has purposes of increasing length of a wound body in a roll by efficiently using a space formed in a container and of improving strength as a unit by reducing the space.

In a roll (1) in which a wound body (2) is wound around a specified axis for plural times, a spacer (3) is provided in a portion of a region between turns of the wound body (2).

The invention has purposes of increasing length of a wound body in a roll by efficiently using a space formed in a container and of improving strength as a unit by reducing the space.

In a roll (1) in which a wound body (2) is wound around a specified axis for plural times, a spacer (3) is provided in a portion of a region between turns of the wound body (2).

A wire spool structure for facilitated wire winding includes: at least one wire winding portion; a plurality of wire exit portions, each including a channel, which penetrates the wire exit portion, and includes at least one exit and a bridge pin integrally extended and formed from the wire exit portion and located at the exit of the channel to allow a wire to be wound thereon; and a plurality of conductive pins, disposed correspondingly to the wire exit portions, respectively, each including an installation section and a wire connecting section connected to the wire installation section. After an end of the wire is wound on the bridge pin, each conductive pin is inserted into the channel such that the wire connecting section protrudes from the exit and is welded with the wire by a welding material to form an electrical connection.