Sheet material for cleaning the head of a magnetic storage disc drive, comprising a sheet of head-cleaner material which serves to clean such a head, the head-cleaner material being laminated to a backing sheet of stiffening material. This composite sheet material may be cut to the shape of a magnetic storage disc and contained within a protective cassette housing.

A cleaning card particularly for a time recorder which is formed with a large number of cleaning protrusions over the front and rear surfaces thereof, said cleaning protrusions being adapted to clean the front faces of the protective glasses for both the card detecting and code reading photoelectric sending and receiving elements which are located opposite to each other on the both sides of the cars passage in the time recorder.

Disclosed is a cleaning system for flexible disk equipment or the like. The system includes a cleaning disk made of an absorbent and porous fibrous material which has an area substantially saturated with a liquid cleaning solution. The cleaning disk is rotatably supported within a flat jacket. The jacket includes opposed openings on either side so as to expose a portion of the cleaning disk to enable the disk to come into contact with a magnetic head or heads and its associated pressure pad if one is used. At least one of the openings is enlarged to expose a relatively large portion of the surface of the cleaning disk, so as to facilitate complete saturation of an area of the cleaning disk with a liquid cleaning solution while leaving a portion of the cleaning disk dry. The jacket containing the disk is placed within a flexible disk system which rotates the saturated disk, thus causing the magnetic head(s) and the pressure pad to be cleaned in a non-abrasive fashion with a wet, dry, wet action.

A cleaning disc cartridge capable of concurrently cleaning both a magnetic head of a magneto-optical disc apparatus and an optical lens thereof without causing any error in reading of a signal. A rotating disc is provided on one surface thereof opposite to a magnetic head of the apparatus with a head cleaning member and on the other surface thereof opposite to an objective lens of the apparatus with lens cleaning members. The rotating disc includes a disc body which is provided with an inventory region defined on an inner peripheral side of a lens cleaning member arrangement region, a reproduction-only region defined on an outer peripheral side of the lens cleaning member arrangement region, and an information recording and reproducing region outside the reproduction-only region.

A cleaning device for the heads of a Personal Computer is in the form of a diskette insertable in a disk drive of the computer. The diskette is provided with a pair of superimposed abrasive disks each of which rubs against one head of the computer when the diskette is in the disk drive and the latter is activated.