The sheet conveyance apparatus includes first and second rollers, the second roller coming into contact with the first roller and thereby forming a nip portion, the second rotation axis being inclined with respect to the first rotation axis, wherein the second roller includes a first outer circumferential portion having a first outside diameter, a second outer circumferential portion arranged on one side of the first outer circumferential portion in an axial direction of the second rotation axis and having a second outside diameter larger than the first outside diameter, and a third outer circumferential portion arranged on the other side of the first outer circumferential portion, and wherein an outer circumferential surface of the first roller contacts with at least the first, second and third outer circumferential portions of the second roller, to form the nip portion.

A ridged paper ejection roller according to the present invention conveys a paper sheet in cooperation with a plurality of star wheels disposed apart from each other in a width direction of the paper sheet, and includes a rigid main shaft body and a resin body coated on the main shaft body. The resin body integrally includes a plurality of large diameter-regions that work in conjunction with the respective star wheels to hold therebetween and convey the paper sheet, and small-diameter regions other than the large-diameter regions.

A pipe stop and stored energy dampening apparatus comprising a main body, a plurality of rollers connected to the main body, a gear connected to a first roller of the plurality of rollers, a gear lever connected to the main body and adapted to engage with the gear, a gear handle connected to the gear lever, and a clamp connected to the main body. Methods related to dispensing pipe or conduit or hosing from a spool or other device on which a pipe or conduit is wound or otherwise stored, controlling stored energy of the pipe or conduit in preventing injuries, and eliminating wasted pipe or conduit.