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 machine-actuating mechanism cleaning card includes a substrate having a central plane between opposed surfaces, a machine direction dimension between opposed end edges and a transverse direction dimension between opposed side edges. The opposed surfaces each have a plurality of discrete raised areas arranged in transversely extending rows. At least some of the discrete raised areas in at least some of the transversely extending rows extend outwardly on each side of the central plane. The discrete raised areas each include a peak and a peripheral wall joined at one edge to the peak and having an opposed edge that is closer to the central plane than the peak. The cleaning substrate has an effective thickness that is greater than the nominal thickness. Methods of making cleaning cards also are part of the invention.

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 leading and trailing end edges and a transverse direction dimension defined between opposed side edges. The opposed surfaces each have a plurality of discrete raised areas, each including a peak and an inclined peripheral leading wall including an edge remote from the peak. The peak of each raised area is further from the central plane than the edge of the inclined peripheral leading wall remote from the peak and leading walls of a plurality of discrete raised areas have edges defining openings therein for assisting in removing debris from the machine components.