Abstract: A system for cleaning a substrate comprising bringing a contact cleaning web into moving synchronous contact with the surface of a member to be cleaned to clean the surface.

Abstract: A sheet stripping device for electrostatographic systems includes a frame, a member having movable surface for conveying a receiving sheet, and a sheet stripping element for separating the receiving sheet from the movable surface, the sheet stripping element including a stripping element having a leading edge adapted to contact the movable surface and strip the sheet from the movable surface, the leading edge coated with a material including an electrically conductive material comprising a film forming polymer and an electrically conductive additive. The leading edge may include a thermally resistant polymer of cross-linked siloxane-silica hybrid material, a polyimide or a poly(amide-imide). The sheet stripping means may be prepared by coating the leading edges of preformed stripping elements.

Abstract: A back and stomach supporting belt has an unpadded central panel of 1/4 inch leather which is placed in the small of the back to cover the five lumbar vertebra and the sacrospinalis muscles on both sides of the lumbar vertebra, but not over the large lower portions of the latissimus dorsi muscles. The ends of the belt extend from the central panel so that when fastened together around the user's abdominal muscles, the central panel bears against the lumbar area, pressing forward into a position restricting the sacrospinalis muscles and the lumbar vertebra from relaxing into a position which may cause pain to the lower part of the spine.

Abstract: A puzzle that includes a transparent box having a small cup mounted upon its floor and a small bead suspended on a thread from a ceiling of the box, the box being shaken manually by a player in attempting to get the bead into the cup, and in a modified design the cup and the thread being fastened on manually rotatable platforms.

Abstract: A system for measuring, storing, and analyzing excavator parameters in order to classify excavator activity. A rotary position sensor is coupled to the drag drum, the hoist drum, and the center pindle of an excavator in order to generate analog signals that are a function of the drag cable length, the hoist cable length, and the swing angle, respectively. Shunts are placed in circuit with the drag motor armature and the hoist motor armature in order to generate signals proportional to the drag motor current and the hoist motor current, respectively. A watts transducer connected to the power input generates a signal that is proportional to the amount of power being consumed by the excavator. A control panel is provided whereby an operator can set in the month, day, and the shift, and codes identifying the excavator, the operator and any delay or special activities. The six excavator signals are converted into digital form and recorded along with time and the control panel data on a magnetic tape.