Patent ID: 7846534

Claim:
A cleaning card for the use in cleaning internal surfaces of machine components, said cleaning card including a substrate having a central plane between opposed surfaces thereof, a machine direction dimension defined between opposed end edges and a transverse direction dimension defined between opposed side edges, said substrate including an angled embossment forming angled, elongate raised ridges in said opposed surfaces of said cleaning card substrate and being continuously joined to said substrate, said raised ridges being elongate at an angle other than 90 degrees to both the machine direction and transverse direction to incrementally wipe transversely across said internal surfaces to be cleaned, said opposed surfaces of said substrate each including a plurality of discrete, raised working areas having an apparent working thickness for engaging and cleaning internal surfaces to be cleaned, said plurality of raised working areas being joined to said substrate at opposed ends that are spaced-apart locations, said discrete raised working areas each including a peak intermediate said opposed ends, and a sloping peripheral wall, said peripheral wall having sloping sections in opposite directions from opposed sides of said peak to said opposed ends of the working areas, said peak of each raised working area being further from the central plan of the substrate than the opposed ends that are spaced-apart in the machine direction, said elongate raised ridges of the angled embossment having an apparent thickness less than the apparent working thickness of the raised working areas, said raised working areas being more easily collapsible than said elongate raised ridges.