Replacement cheekstrip apparatus for use with cutting cylinder knives

Claim 1

In a roll-fed printing press, a knife box assembly comprising a hollow, elongated knife box of generally rectangular cross-section and including a pair of channels, each channel having a web and a pair of flanges extending in the same direction from opposite edges of said web, one pair of corresponding flanges of the respective channels extending toward each other and supporting therebetween the base of a knife that bisects the knife box and projects therefrom through an opening between the other pair of corresponding flanges of the respective channels, and a pair of elongated cheekstrips extending longitudinally within the knife box at opposite sides of the knife, each cheekstrip comprising two elongated strip pieces that are contiguous along their length, one of said pieces being disposed adjacent to a flange of said one pair of flanges and the other of said pieces being disposed adjacent to a flange of said other pair of flanges, having a flat face juxtaposed with an opposed face of said knife, with the height of said face of said other piece in a direction extending away from said one piece being coextensive with a substantial portion of the corresponding height of said opposed face of said knife in the interior of said knife box, and having a portion that projects from the knife box through said opening between the last-mentioned flange and the knife, said other piece of said cheekstrip having a base portion adjacent to said one piece that is substantially rectangular in cross-section, said one piece being substantially rectangular in cross-section, said one piece being formed of a relatively soft, resilient sponge rubber material and said other piece being formed of a relatively hard polyurethane material, said two pieces of each cheekstrip being bonded to each other throughout their length, said cheekstrips filling substantially the entire hollow interior of said knife box at opposite sides of the knife.