Abstract: An apparatus for sizing bulk sandpaper to produce individual sandpaper sheets suitable for use in hand and powered sanders. A planar member, typically made of clear plastic is provided with a number of marked indicia indicating standard sizes for sander sheets. One or more sides of the planar member may be provided with a cutting edge whether attached to or molded onto the planar member. A handle is provided attached to the planar member to hold sandpaper in place for sizing. In use, a user places the device over a sheet of sandpaper on a workbench or the like and aligns the sandpaper to the desired size indicia. Applying mild pressure to the handle, the user may then tear or cut the sandpaper to the desired size. The apparatus may be economically made without multiple or moving parts and may be readily transported in a tool box, pail or the like.

Abstract: The present invention relates to improved blades for severing sheet materials such as polymeric sheets, metallic foils, and other sheet materials, particularly those suitable for use in the containment and protection of various items including perishable materials. The present invention provides an improved blade for severing sheet materials wherein design parameters for the design of the blade teeth have been tailored for improved severing performance. The blade comprises a blade body and a plurality of individual teeth extending outwardly from the blade body. The teeth each have a finite tooth radius and at least one tooth parameter selected from the group of optimized tooth parameters consisting of a tooth radius less than about 0.005 inches, a tooth pitch of less than about 0.050 inches, and a tooth thickness of less than about 0.006 inches.

Abstract: A device for guarding against the placement of paint in unwanted areas during painting, including an elastomeric body having a butt edge and a feather edge opposite the butt edge for cutting in a line defining the boundary of a painted area. A handle is formed integrally with, or attached at one of its ends to, the butt edge of the elastomeric body, and projects from the body. Embedded within the elastomeric body are a plurality of flexible reinforcing elements, which elements can be bent, along with the elastomeric body, to retain the elastomeric body in a curved configuration so that the feather edge thereof, in conforming to such curvature, can be used for cutting in an area lying in a curved geometric surface. The flexible reinforcing elements preferably extend transversely across the elastomeric body, as well as lengthwise therein.