Abstract: A cleaning disk is described that is made of a pair of layers of head-cleaning material which are translucent to light produced by a light source in a magnetic disk-reading machine. The layers are adhered with an adhesive having sufficient opacity caused by the addition of pigment to reduce the light transmitted through the layers from the light source enough to prevent sensing of the light by the corresponding light sensor. Fibers of the layers, when made of fabric, may extend through the adhesive to provide for permeation of a solvent from one layer to the other. The layers are preferably adhered by heat plastified thermoplastic polymeric adhesive which is compressed between non-heat-plastified layers and which is formed to have solvent-transmitting holes extending through it.

Abstract: A card is provided for cleaning transducer heads of magnetically-encoded card reading machines. The card includes a surface region disposed for contacting such a transducer head and releasably holds a head cleaning solvent adjacent the surface region. The material forming the surface region may be visually distinguishable when it is holding solvent as compared to when it is not. Further, this material may be translucent when holding solvent. If so, the material immediately next to the solvent-holding material is a color which is visible through the material. Also, the card may have layers which are joined by heat-bonding. The side of the card opposite from the surface region then preferably is another color.

Abstract: A material and method of forming it into tubular wall structures for product dispensing tubes is described. The material is a continuous web which is printed on one side with a succession of two different advertisement messages it is desired to appear on two different dispensing tubes. Such messages are printed in alternately repeating sequence along the length of the material so that the material can be thought of as being divided lengthwise into repeating sections, each one of which includes both advertising messages. Each of such sections is generally twice as long as the outer circumference desired for the dispensing tube, with each portion having a different message thereon taking up one-half of the section so that each of such portions has a length generally equal to such desired outer circumference. The method includes the steps of separating one of such sections from the remainder of the material when it is desired to form a tubular structure for a dispensing tube.