Abstract: A rotary impulse sealer includes a roller having a roller body and a plurality of seal bars extending radially outwardly from the roller and spaced apart around the roller body. At least one of the seal bars has a body and a selectively heatable heating element extending along at least a part of a length of the seal bar body. The roller is rotatable through a pre-heating pressure application region in which the at least one seal bar is adapted to apply pressure to a bond area of the bondable material, followed by a heating region in which the at least one seal bar is adapted to heat the bond area, wherein the at least one seal bar and tensioned belt are configured to sandwich the bondable material directly between the at least one seal bar and tensioned belt during the pre-heating pressure application region and the heating region.

Abstract: A carrier (10) for an air tube conveyor comprises a cylindrical body (11) of flexible material with accelerator rings (25) attached to either end of the body. The accelerator rings (25) comprise a plurality of circular sheets of flexible material secured together across the end of the body. The diameter of the accelerator rings (25) is slightly greater than the internal diameter of he air tube conveyor. Reinforcement is provided by longitudinal ribs (140, 141).

Abstract: A clutch assembly for an accumulating roller conveyer such that torque transmission is accomplished by using clutch plates of deformable material which in association engage with the conveyer drive and conveyer rollers to allow the bearings to deform the surfaces of the clutch plates in transmitting the torque from the drive to the rollers.

Abstract: A jet pump which is used in dredging situations and includes a series of water nozzles which create a slurry in a sand mass by erosion thereof, the slurry being conveyed to a receiving station.

Abstract: A feeder comprising in combination a vessel (10) of substantially circular cross section that contains an en-masse conveyor (11) that is constrained to pass through a trough (16.sub.1, 16.sub.2) spaced from the internal wall of said vessel so that material being conveyed from an inlet (10.sub.1) in said vessel (10) to an outlet (14.sub.2) in said vessel (10) by said conveyor does not come into rubbing contact with said wall.

Abstract: A disposable, or one-time-use microsurgical knife has a slidable shroud that can be moved into a forward position to protect the blade, and can be moved rearwardly to allow use of the knife. The shroud, as well as other parts of the knife, are made of plastic, and a phosphorescent material is included to render the knife luminescent during steps taken in a darkened operating room. The extremely sharp razor chip blade includes a shank selectively wedged into the knife body so blades are interchangeable.