A sharpening apparatus for sharpening the blades of a forage harvester chopper drum includes a carriage to which is mounted a grindstone carrier that holds a grindstone that is moved across the chopper drum during sharpening operation. The grindstone carrier includes an element which is mounted to the carriage for movement towards the chopper drum in order to advance the grindstone. The carrier element contains a threaded bore in which is received a threaded shaft that has a ratchet wheel fixed ...

A sharpener includes a motor driven shaft with at least one slidably mounted sharpening assembly consisting of a supporting hub structure mounted by its central bore hole on the shaft. The hub structure supports a symmetrically shaped rotating surface containing an ultra fine abrasive material. The rotating surface is pressed with a force of less than 0.2 lb. by a spring action to make sustained rotating abrading contact with a facet of a knife positioned by a knife guide to align the facet into...

The invention relates to a sharpening device for sharpening cutting edge tools and the like, comprising two sharpening elements arranged, at a distance from each other in the axial direction, for rotation on a shaft extending along a center axis common to the sharpening elements. The sharpening elements have arms extending radically outwards from the shaft, said device being characterized in that the sharpening elements are arranged relative to each other in such a way, that their respective arm...

An abrasive material contains abrasive particles in the range of 50 to 80% by weight in an olefinic thermalplastic resin system which is based on ethylene copolymer. The material may be incorporated on a substrate structure to be used as a stropping or honing material or may be shaped by an injection molding process or may be injection molded over a rigid insert or molded over a rigid wheel or disk inserted in the mold. The material may be used for polishing and finishing of crystalline material...

The sharpening apparatus of the present invention preferably comprises a hand sharpener that may be assembled or mounted on the knife (e.g., sold mounted on the knife by the knife manufacturer or purchased separately and mounted on the knife by the end-user), and which may remain on the knife after sharpening.

A sharpening apparatus (16) for a blade-like cutting implement. The sharpening apparatus has an elongate body (18) and a cutting edge extending widthwise across one end of the body (11) at a predetermined angle relative to the longitudinal axis of the body (11). The cutting edge is formed by an inclined face formed on one side face of the body. The apparatus includes a cradle (26) for holding a blade-like implement to be sharpened and a mounting body for mounting the cradle (26) relative to a gr...

A support device for facilitating the sharpening of a knife blade or the like is provided. The device is a solid block of rigid material having a flat lower surface to rest on a stable surface and an upper surface parallel to the lower surface. The upper surface has an elongated arcuate channel therein which extends the length of the block. Two spaced apart lips extend horizontally along the upper edges of the channel and extend slightly inwardly of the upper edges of the channel towards each ot...

A sharpener assembly for a rotating circular knife blade on a food product slicing machine has an elongate frame mounted at one of its ends for pivotal movement about an axis being substantially in the plane of the knife blade. The elongate frame has mounted for rotation thereon a grinding stone and a deburring stone. The grinding face of the grinding stone is inclined to the knife blade at an angle so as to grind a required angle on the edge of the obverse face of the knife blade. The grinding ...

According to one aspect, there is provided a method of determining if pixel level values of a digital picture image can benefit from an adjustment in levels to enhance the edge appearance of the image. The method involves: (1) locating edges within the image; (2) determining pixel level values across found edges; (3) determining existing overshoot from the pixel level values found at step 2; and (4) determining, based on the overshoot magnitude, if an adjustment in pixel level values will be ben...

A sharpening apparatus for sharpening blades of tools and other implements such as spatulas and grill scrapers. The sharpening apparatus includes a base member on which a sharpening stone is positioned. A slidable blade guide member is slidably connected to the base member. The slidable blade guide member includes a guide surface that is disposed at an angle relative to the upper surface of the sharpening stone, and a mounting mechanism for removably mounting a spatula against the guide surface ...