Abstract: A cleaning card for use in cleaning internal surfaces of a machine-reading mechanism includes a substrate having plurality of discrete raised areas in opposed surfaces thereof. The discrete raised areas each include a peak and a peripheral wall having an edge remote from the peak, and the peak of each raised area is farther from a central plane of the card than the edge of the peripheral wall remote from the peak. Relief means are provided in the substrate for preventing the peaks of at least some of the discrete raised areas from flattening toward the central plane to an extent that such peaks will not effectively engage and clean desired internal surfaces of a machine-reading mechanism when the cleaning card moves in the machine direction in other than a single, substantially linear plane.

Abstract: The invention relates to a various methods of adding a liquid additive to a foam whereby the location of the additive within the foam can be precisely controlled. It also describes embodiments of a foam wherein the additive has been localized at particular areas of the foam.

Abstract: A cleaning card for use in cleaning internal surfaces of machine components includes 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. The substrate includes an embossment forming angled, substantially non-collapsible, elongate raised ridges on opposite sides of the cleaning card substrate, with the raised ridges being oriented at an angle to the machine direction for incrementally wiping transversely across the internal surfaces to be cleaned, which can include peripheral surfaces of idler rolls. Preferably the opposed surfaces of the substrate each have a plurality of discrete, raised and collapsible working areas for engaging and cleaning internal surfaces of machine components.

Abstract: A cleaning card for use in cleaning internal surfaces of machine components includes a substrate having a central plane between opposed outer surfaces, a machine direction dimension defined between opposed end edges and a transverse direction dimension defined between opposed side edges. The opposed surfaces have a plurality of discrete raised working areas for engaging and cleaning internal surfaces of the machine components. The working areas each include a peak and a peripheral wall having an edge remote from the peak and the peak of each raised working area is further from the central plane than the edge of the peripheral wall remote from the peak. The cleaning card substrate has an effective working thickness that is greater than the nominal thickness between the opposed surfaces.