Abstract: A scale holder is provided for securely retaining a scale to permit various measurements to be made. The scale holder includes orthogonally disposed major and minor planar walls on which the scale holder can be securely supported. The scale holder further includes a nonplanar support defined by intersecting generally planar support surfaces to permit the scale holder to be supported on an arcuate or irregular surface. A plurality of scale guides and slots are provided to selectively position a scale in orthogonal or parallel relationship to one or more of the walls of the scale holder. Clamps further are provided to retain the scale in selected position relative to the scale holder.

Abstract: A wrench for removing and installing cylindrical retainers, particular sight glass retainers comprises a base member, a guide member and a pair of projections. The base member has a planar stop surface on one axial end. The guide member is fixed to the base member and extends perpendicularly from the stop surface. The projections extend in opposite directions from the guide member parallel to and over the stop surface. When coupled to a sight glass retainer, the stop surface engages an exposed axial end portion of the retainer, the guide member engages the retainer inner cylindrical surface, and the projections are received within diametrically opposite recesses in the retainer end portion.

Abstract: A case for carrying and storing a web slitting blade includes a rubber padded circular platform having a central post extending upwardly therefrom for receiving the hub of a web slitter blade. A cylindrical cover is threadedly connected to the central post to enclose the slitter blade and complete the carrying case. The threaded member connecting the cover to the post includes a key-shaped opening to provide a handle for ease of carrying of the case.